Stator assembly and sound wave motor

Abstract

The utility model discloses a stator assembly, which comprises a stator support and a plurality of coil windings wound on the stator support, each coil winding is uniformly distributed around the axis of the stator support, and two adjacent coil windings are connected in parallel through a connecting line; the stator support is provided with two axial end faces, at least one axial end face is provided with an end face groove between two adjacent coil windings, and a connecting line between the two adjacent coil windings is arranged in the corresponding end face groove. The stator assembly can prevent the connecting wire from being exposed outside. The utility model further discloses a sound wave motor and an electric toothbrush. The sound wave motor and the electric toothbrush comprise the stator assembly.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a stator assembly and a sonic motor. Background Art

[0002] As people's living standards continue to improve, their awareness of oral health care has gradually increased. Compared with ordinary toothbrushes, electric toothbrushes have better oral cleaning effects, can reduce gingival inflammation and remove dental plaque more thoroughly, so more and more people choose electric toothbrushes. The sonic motor is the core component of the electric toothbrush, which drives the brush head to generate mechanical vibrations within the ultrasonic frequency domain to achieve efficient cleaning of teeth.

[0003] The sonic motor is mainly composed of a stator assembly and a rotor assembly. The stator assembly includes a stator bracket and a plurality of coil windings wound on the stator bracket. Two adjacent coil windings are connected in parallel through connecting wires.

[0004] The existing connecting wires are routed directly from the end face of the stator bracket, or a wire passing post is set on the end face of the stator bracket, and then the connecting wires are wrapped around the wire passing post for routing. In short, the connecting wires are exposed outside the stator bracket when routing, without any protection measures, and are extremely easy to be hung or broken during the motor assembly process. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a stator assembly, which can prevent the connecting wires from being exposed.

[0006] The utility model also provides a sonic motor, comprising the stator assembly.

[0007] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0008] A stator assembly comprises a stator support and a plurality of coil windings wound on the stator support, wherein the coil windings are evenly distributed around the axis of the stator support, and two adjacent coil windings are connected in parallel via a connecting wire; the stator support has two axial end faces, at least one axial end face is provided with an end face groove between two adjacent coil windings, and the connecting wire between the two adjacent coil windings is built into the corresponding end face groove.

[0009] Furthermore, the depth of the end surface groove is greater than the diameter of the connecting wire.

[0010] Furthermore, the connecting wire between two adjacent coil windings includes a positive connecting wire and a negative connecting wire, and there are two end surface grooves between the two adjacent coil windings, the positive connecting wire is built into one of the end surface grooves, and the negative connecting wire is built into the other end surface groove.

[0011] Furthermore, two end surface grooves between two adjacent coil windings are respectively arranged on two axial end surfaces of the stator bracket.

[0012] Furthermore, the outer side wall of the end surface groove protrudes into the groove at least at one place to form at least one first abutment portion, and the connecting line abuts against the first abutment portion.

[0013] Furthermore, the inner side wall of the end surface groove protrudes into the groove at least at one place to form at least one second abutment portion, and the connecting line abuts against the second abutment portion.

[0014] Furthermore, the stator assembly also includes two axial end covers, which are respectively arranged on two axial end faces of the stator bracket to cover and close an end face groove on at least one axial end face.

[0015] Furthermore, the stator support includes a plurality of winding parts, one winding part corresponds to one coil winding, and each coil winding is wound on the corresponding winding part.

[0016] Furthermore, each winding part is provided with a plurality of core cavities, and each core cavity is provided with a stator core.

[0017] A sonic wave motor comprises a rotor assembly, an output shaft and the above-mentioned stator assembly, wherein an axial cavity is provided at the center of the stator bracket, the rotor assembly is rotatably arranged in the axial cavity of the stator bracket, and one end of the output shaft is axially connected to the rotor assembly.

[0018] The utility model has the following beneficial effects: the stator assembly of the utility model arranges the end face groove on at least one axial end face of the stator bracket so that the connecting wire between two adjacent coil windings is built into the corresponding end face groove, thereby preventing the connecting wire from being exposed outside the axial end face of the stator bracket, thereby preventing the connecting wire from being hung or broken during the motor assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model provides a schematic structural diagram of an axial end surface on one side of the sonic motor.

[0020] Figure 2 This is a schematic structural diagram of the other axial end surface of the sonic motor provided by the utility model.

[0021] Figure 3 This is a schematic structural diagram of the end surface groove and connecting wires of the sonic motor provided by the utility model.

[0022] Figure 4This is a schematic structural diagram of a stator bracket in the sonic motor provided by the utility model.

[0023] Figure 5 This is a schematic structural diagram of another sonic motor provided by the utility model.

[0024] Figure 6 This is a schematic structural diagram of a rotor assembly in the sonic motor provided by the utility model. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Embodiment 1

[0030] like Figure 1-3As shown, a stator assembly 10 includes a stator support 11 and a plurality of coil windings 12 wound on the stator support 11, wherein each coil winding 12 is evenly distributed around the axis of the stator support 11, and two adjacent coil windings 12 are connected in parallel via a connecting wire 13; the stator support 11 has two axial end faces, at least one axial end face is provided with an end face groove 111 between two adjacent coil windings 12, and the connecting wire 13 between two adjacent coil windings 12 is built into the corresponding end face groove 111.

[0031] The stator assembly 10 of the present invention is provided with the end face groove 111 on at least one axial end face of the stator bracket 11 so that the connecting wire 13 between two adjacent coil windings 12 is built into the corresponding end face groove 111, thereby preventing the connecting wire 13 from being exposed outside the axial end face of the stator bracket 11, thereby preventing the connecting wire 13 from being hung or broken during the motor assembly process.

[0032] Among them, the connecting wire 13 between two adjacent coil windings 12 includes a positive connecting wire 13 and a negative connecting wire 13, the positive connecting wire 13 connects the positive poles between the two adjacent coil windings 12, and the negative connecting wire 13 connects the negative poles between the two adjacent coil windings 12; the positive connecting wire 13 and the negative connecting wire 13 are respectively built into different end surface grooves 111, that is, there are two end surface grooves 111 between the two adjacent coil windings 12, the positive connecting wire 13 is built into one of the end surface grooves 111, and the negative connecting wire 13 is built into the other end surface groove 111.

[0033] Preferably, the two end surface grooves 111 between two adjacent coil windings 12 are respectively arranged on the two axial end surfaces of the stator bracket 11. That is, a plurality of end surface grooves 111 are arranged on one axial end surface of the stator bracket 11, each end surface groove 111 extends between two adjacent coil windings 12, and a plurality of end surface grooves 111 are also arranged on the other axial end surface of the stator bracket 11, each end surface groove 111 also extends between two adjacent coil windings 12, so that between two adjacent coil windings 12, there is an axial groove on one axial end surface of the stator bracket 11 for embedding one of the positive electrode connection line 13 and the negative electrode connection line 13, and there is also an axial groove on the other axial end surface of the stator bracket 11 for embedding the other of the positive electrode connection line 13 and the negative electrode connection line 13.

[0034] The depth of the end surface groove 111 is greater than the diameter of the connecting wire 13 , so that the connecting wire 13 can be completely hidden in the end surface groove 111 without being exposed from the end surface groove 111 .

[0035] like Figure 3 As shown, the outer side wall of the end face groove 111 protrudes into the groove at least at one place to form at least one first abutment portion 11f, and the inner side wall of the end face groove 111 protrudes into the groove at least at one place to form at least one second abutment portion 11g; the connecting line 13 abuts against the first abutment portion 11f and the second abutment portion 11g respectively.

[0036] The stator assembly 10 of the utility model forms a first abutment portion 11f and a second abutment portion 11g which abut against the connecting wire 13 by protruding on the inner and outer side walls of the end face groove 111, so as to increase the friction between the connecting wire 13 and the inner and outer side walls of the end face groove 111, thereby preventing the connecting wire 13 from slipping out of the end face groove 111 under high-frequency vibration of the motor.

[0037] In this embodiment, the end surface groove 111 includes a first wiring groove 11a, a second wiring groove 11b, a third wiring groove 11c, a fourth wiring groove 11d and a fifth wiring groove 11e connected in sequence, the outer wall connection between the first wiring groove 11a and the second wiring groove 11b protrudes into the groove to form a first abutment portion 11f, the outer wall connection between the fourth wiring groove 11d and the fifth wiring groove 11e protrudes into the groove to form another first abutment portion 11f, the first wiring groove 11a and the second wiring groove 11b protrude ... The inner wall connection between the second wiring groove 11b and the third wiring groove 11c protrudes into the groove to form a second abutment portion 11g, and the inner wall connection between the third wiring groove 11c and the fourth wiring groove 11d protrudes into the groove to form another second abutment portion 11g; wherein, the other end of the first wiring groove 11a extends to the side of one of the two adjacent coil windings 12, and the other end of the fifth wiring groove 11e extends to the side of the other of the two adjacent coil windings 12.

[0038] The inner side wall refers to a side wall of the end surface groove 111 facing the axis of the stator support 11 , and the outer side wall refers to a side wall of the end surface groove 111 facing away from the axis of the stator support 11 .

[0039] like Figure 4 As shown, the stator support 11 includes a plurality of winding parts 112, one winding part 112 corresponds to a coil winding 12, and each coil winding 12 is wound on the corresponding winding part 112; each winding part 112 is provided with a plurality of core cavities, and each core cavity is provided with a stator core 113.

[0040] Preferably, Figure 5As shown, the stator assembly further includes two axial end covers 14, which are respectively arranged on the two axial end faces of the stator bracket 11 to cover and close the end face groove 111 on at least one axial end face to prevent the connecting wire 13 from escaping from the end face groove 111.

[0041] Embodiment 2

[0042] like Figure 1 and 2 As shown, a sonic wave motor includes a rotor assembly 20, an output shaft 30 and the above-mentioned stator assembly 10, wherein an axial cavity is provided at the center of the stator bracket 11, the rotor assembly 20 is rotatably arranged in the axial cavity of the stator bracket 11, and one end of the output shaft 30 is axially connected to the rotor assembly 20.

[0043] In this embodiment, Figure 6 As shown, the rotor assembly 20 includes a rotor support 21 and a plurality of magnet groups 22 arranged on the rotor support, and each magnet group 22 is evenly distributed around the axis of the rotor support 21 .

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A stator assembly, comprising a stator support and a plurality of coil windings wound on the stator support, wherein each coil winding is evenly distributed around the axis of the stator support, and two adjacent coil windings are connected in parallel via a connecting wire; characterized in that: The stator support has two axial end faces, at least one of the axial end faces is provided with an end face groove between two adjacent coil windings, and the connecting wire between the two adjacent coil windings is built into the corresponding end face groove.

2. The stator assembly according to claim 1, characterized in that The depth of the end surface groove is greater than the diameter of the connecting wire.

3. The stator assembly according to claim 1, characterized in that: The connecting wire between two adjacent coil windings includes a positive connecting wire and a negative connecting wire. There are two end surface grooves between the two adjacent coil windings. The positive connecting wire is built into one of the end surface grooves, and the negative connecting wire is built into the other end surface groove.

4. The stator assembly according to claim 3, characterized in that: Two end surface grooves between two adjacent coil windings are respectively arranged on two axial end surfaces of the stator bracket.

5. The stator assembly according to claim 1, characterized in that The outer side wall of the end surface groove protrudes into the groove at least at one place to form at least one first abutment portion, and the connecting line abuts against the first abutment portion.

6. The stator assembly according to claim 1 or 5, characterized in that: The inner side wall of the end surface groove protrudes into the groove at least at one place to form at least one second abutment portion, and the connecting line abuts against the second abutment portion.

7. The stator assembly according to claim 1, characterized in that The stator assembly further comprises two axial end covers, which are respectively arranged on two axial end faces of the stator bracket to cover and seal an end face groove on at least one axial end face.

8. The stator assembly according to claim 1, characterized in that The stator support includes a plurality of winding parts, one winding part corresponds to one coil winding, and each coil winding is wound on the corresponding winding part.

9. The stator assembly according to claim 8, characterized in that A plurality of iron core cavities are arranged in each winding part, and a stator iron core is arranged in each iron core cavity.

10. A sonic motor, characterized in that: It comprises a rotor assembly, an output shaft and the stator assembly as claimed in claim 1, wherein an axial cavity is provided at the center of the stator support, the rotor assembly is rotatably arranged in the axial cavity of the stator support, and one end of the output shaft is axially connected to the rotor assembly.

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