Motor support structure and sound wave motor

Abstract

The utility model discloses a motor support structure, which comprises a stator support, a rotor support and two axial end covers, the stator support is provided with two axial end faces, and the two axial end covers are respectively arranged on the two axial end faces of the stator support; at least one axial end face of the stator support is detachably connected with the axial end cover corresponding to the axial end face through a clamping structure. According to the motor support structure, the assembly process can be simplified, the jig cost is saved, the stress is uniform after assembly, and each part can be detached for recycling. The utility model further discloses a sound wave motor which comprises the motor support structure.

Description

Technical Field

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

[0002] As people's living standards continue to improve, their awareness of oral health has gradually increased. Compared with ordinary toothbrushes, electric toothbrushes have better oral cleaning effects, can reduce gingivitis, and can more thoroughly remove dental plaque, etc. Therefore, more and more people choose electric toothbrushes.

[0003] The sonic motor is the core component of an electric toothbrush, which drives the brush head to generate high-frequency vibrations to achieve efficient cleaning of teeth. Existing sonic motors are equipped with front and rear end covers on the front and rear end surfaces of the stator bracket, which are used to connect and install the rotor bracket inside the stator bracket, and also seal the rotor assembly cavity inside the rotor bracket to prevent dust from entering.

[0004] At present, the front and rear end covers and the rotor bracket are fixed by screws or riveting the casing. Not only is the assembly process relatively complicated, but there are at least the following problems:

[0005] 1) For the screw fixing process, a jig is required to fix the relative position between the front and rear end covers and the stator bracket during assembly. The cost of the jig is high, and the screws are fixed in batches, resulting in uneven force. The ultrasonic motor has a rotor eccentricity problem after assembly;

[0006] 2) For the riveting casing process, various equipment and jigs are required for riveting installation to ensure the strength of the riveting position and the pressing size. There is also the problem of jig cost. In addition, if there is an abnormality in the equipment and jigs during the production process, it will directly affect the riveting strength and dimensional stability of the product. Moreover, riveting is an integrated fixation. After the front and rear end covers and the stator bracket are fixed through the riveting casing process, an integrated structure will be formed, causing the entire stator assembly to become a disposable product. If a component is defective, the entire stator assembly cannot be recycled. Utility Model Content

[0007] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a motor bracket structure, which can simplify the assembly process, save the cost of jigs, and evenly bear the force after assembly, and each part can be disassembled for recycling.

[0008] The utility model also provides a sonic wave motor, comprising the motor support structure.

[0009] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0010] A motor support structure comprises a stator support, a rotor support and two axial end covers, wherein the stator support has two axial end faces, and the two axial end covers are respectively arranged on the two axial end faces of the stator support; a snap-fit ​​structure is used to realize a detachable connection between at least one axial end face of the stator support and the corresponding axial end cover.

[0011] Furthermore, the snap-fit ​​structure includes a plurality of snaps and a plurality of snap holes, one snap corresponds to one snap hole; one of the corresponding snaps and snap holes is arranged on the axial end face of the stator bracket, and the other is arranged on the axial end cover corresponding to the axial end face; when the axial end face of the stator bracket is snapped with the axial end cover, the snap is snapped into the snap hole.

[0012] Furthermore, a positioning structure is used between at least one axial end face of the stator support and the corresponding axial end cover to achieve connection and positioning.

[0013] Furthermore, the positioning structure includes a plurality of positioning posts and a plurality of positioning holes, one positioning post corresponds to one positioning hole; one of the corresponding positioning posts and positioning holes is arranged on the axial end face of the stator bracket, and the other is arranged on the axial end cover corresponding to the axial end face; when the axial end face of the stator bracket is snap-fitted with the axial end cover, the positioning post is embedded in the positioning hole.

[0014] Furthermore, each buckle and each clamping hole are evenly distributed on the first circumference, each positioning column and each positioning hole are evenly distributed on the second circumference, and the first circumference and the second circumference are both centered on the axis of the stator bracket and the axial end cover; the diameter of the first circumference is greater than the diameter of the second circumference.

[0015] Furthermore, the stator bracket includes at least two bracket parts separated around the axial direction, and at least one axial end face of each bracket part is provided with at least one clip or clip hole. Each bracket part is clipped with a clip hole or clip on at least one axial end cover through the clip or clip hole on at least one axial end face thereof, so that each bracket part abuts against each other to form the stator bracket.

[0016] Furthermore, a limiting structure is used between two abutting bracket parts to achieve abutment limiting.

[0017] Furthermore, the limiting structure includes a limiting groove and a limiting block, one of the limiting groove and the limiting block is arranged on the abutment surface of one of the bracket parts, and the other is arranged on the abutment surface of the other bracket part; when the two bracket parts abut against each other, the limiting block is embedded in the limiting groove.

[0018] Furthermore, a rotor assembly cavity is provided at the center of the stator bracket, the rotor bracket is rotatably arranged in the rotor assembly cavity of the stator bracket, and the axial ends of the rotor bracket are rotatably connected to two axial end covers respectively.

[0019] A sonic wave motor comprises a plurality of coil windings, a plurality of magnet groups and the above-mentioned motor support structure, wherein each coil winding is evenly arranged on the stator support in an axial direction, and each magnet group is evenly arranged on the rotor support in an axial direction.

[0020] The utility model has the following beneficial effects: the motor bracket structure of the utility model adopts a clamping structure to realize a detachable connection between the stator bracket and the two axial end covers, thereby simplifying the assembly process; the stator bracket and the two axial end covers are subjected to uniform force when clamped; and the stator bracket and the two axial end covers are detachable, thereby facilitating the disassembly and recycling of the stator bracket and the two axial end covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of the motor bracket structure provided by the utility model.

[0022] Figure 2 This is a schematic diagram of the separation of the stator bracket in the motor bracket structure provided by the utility model.

[0023] Figure 3 This is a structural schematic diagram of the sonic motor provided by the utility model. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Embodiment 1

[0029] like Figure 1 As shown, a motor support structure includes a stator support 11, a rotor support 12 and two axial end covers 13, wherein the stator support 11 has two axial end faces 110, and the two axial end covers 13 are respectively arranged on the two axial end faces 110 of the stator support 11; a snap-fit ​​structure is used to realize a detachable connection between at least one axial end face 110 of the stator support 11 and the corresponding axial end cover 13.

[0030] The motor bracket structure of the utility model adopts a clamping structure to realize a detachable connection between the stator bracket 11 and the two axial end covers 13, thereby simplifying the assembly process. The stator bracket 11 and the two axial end covers 13 are subjected to uniform force when clamped, and the stator bracket 11 and the two axial end covers 13 are detachable, which facilitates the disassembly and recycling of the stator bracket 11 and the two axial end covers 13.

[0031] Preferably, a snap-fit ​​structure is used between the two axial end faces 110 of the stator bracket 11 and the two axial end covers 13 to achieve a detachable connection.

[0032] The snap-fit ​​structure includes a plurality of snaps 111 and a plurality of snap holes 131, one snap 111 corresponds to one snap hole 131; one of the corresponding snaps 111 and snap holes 131 is arranged on the axial end face 110 of the stator bracket 11, and the other is arranged on the axial end cover 13 corresponding to the axial end face 110; when the axial end face of the stator bracket 11 is snapped with the axial end cover 13, the snap 111 is snapped into the snap hole 131.

[0033] During assembly, the axial end cover 13 only needs to be pressed axially toward the axial end surface 110 of the stator bracket 11 , and each buckle 111 can be simultaneously snapped into each corresponding snap hole 131 to ensure that the stator bracket 11 and the two axial end covers 13 are evenly stressed when snapped together.

[0034] In this embodiment, each buckle 111 is respectively disposed on two axial end surfaces 110 of the stator bracket 11 , and each clamping hole 131 is respectively disposed on two axial end covers 13 .

[0035] Preferably, each buckle 111 and each clamping hole 131 are evenly distributed on a first circumference, and the first circumference takes the axis of the stator bracket 11 and the axial end cover 13 as the center.

[0036] In this embodiment, four buckles 111 are provided on each axial end face 110 of the stator bracket 11, and the four buckles 111 are evenly spaced at a certain angle around the axis of the stator bracket 11; similarly, four buckle holes 131 are provided on each axial end cover 13, and the four buckle holes 131 are evenly spaced at a certain angle around the axis of the axial end cover 13.

[0037] The center of the stator bracket 11 is provided with a rotor assembly cavity, and the rotor bracket 12 is rotatably arranged in the rotor assembly cavity of the stator bracket 11 . The axial ends of the rotor bracket 12 are rotatably connected to two axial end covers 13 respectively.

[0038] Embodiment 2

[0039] As an optimization solution of the first embodiment, in this embodiment, if Figure 1 As shown, a positioning structure is used between at least one axial end face 110 of the stator support 11 and the corresponding axial end cover 13 to achieve connection and positioning.

[0040] The motor bracket structure of the utility model adopts a positioning structure to realize the connection and positioning between the stator bracket 11 and the two axial end covers 13. During the snap-fit ​​assembly, there is no need to use a positioning fixture to position the stator bracket 11 and the two axial end covers 13, which can save the fixture cost.

[0041] Preferably, a positioning structure is used between the two axial end faces 110 of the stator support 11 and the two axial end covers 13 to achieve connection and positioning.

[0042] The positioning structure includes a plurality of positioning posts 112 and a plurality of positioning holes 132, one positioning post 112 corresponds to one positioning hole 132; one of the corresponding positioning posts 112 and positioning holes 132 is arranged on the axial end face 110 of the stator bracket 11, and the other is arranged on the axial end cover 13 corresponding to the axial end face 110; when the axial end face of the stator bracket 11 is snap-fitted with the axial end cover 13, the positioning post 112 is embedded in the positioning hole 132.

[0043] In this embodiment, each positioning column 112 is respectively disposed on two axial end surfaces 110 of the stator support 11 , and each positioning hole 132 is respectively disposed on two axial end covers 13 .

[0044] Preferably, each positioning column 112 and each positioning hole 132 are evenly distributed on the second circumference, and the second circumference takes the axis of the stator support 11 and the axial end cover 13 as the center.

[0045] In this embodiment, four positioning columns 112 are provided on each axial end face 110 of the stator bracket 11, and the four positioning columns 112 are evenly spaced around the axis of the stator bracket 11 at a certain angle; similarly, four positioning holes 132 are provided on each axial end cover 13, and the four positioning holes 132 are evenly spaced around the axis of the axial end cover 13 at a certain angle; of course, the offset angle between two adjacent positioning columns 112 or positioning holes 132 depends on the actual number of the positioning columns 112 or positioning holes 132, and is not specifically limited.

[0046] Preferably, the diameter of the first circle is greater than the diameter of the second circle.

[0047] That is, on the axial end surface 110 of the stator support 11, there is a first distance between the four positioning columns 112 and the axis of the stator support 11, and on the axial end cover 13, there is also a first distance between the four positioning holes 132 and the axis of the axial end cover 13. On the axial end surface 110 of the stator support 11, there is a second distance between the four buckles 111 and the axis of the stator support 11, and on the axial end cover 13, there is also a second distance between the four clamping holes 131 and the axis of the axial end cover 13, and the first distance is smaller than the second distance.

[0048] A group of positioning posts 112 and positioning holes 132 corresponds to a group of buckles 111 and locking holes 131 , and each group of positioning posts 112 and positioning holes 132 is located beside a corresponding group of buckles 111 and locking holes 131 .

[0049] In this embodiment, on the axial end surface 110 of the stator bracket 11, one positioning column 112 corresponds to one buckle 111, and each positioning column 112 is located next to each corresponding buckle 111; on the axial end cover 13, one positioning hole 132 corresponds to one buckle hole 131, and each positioning hole 132 is located next to each corresponding buckle 111.

[0050] Embodiment 3

[0051] As an optimization solution of Embodiment 1 or Embodiment 2, in this embodiment, if Figure 2 As shown, the stator support 11 includes at least two support parts 11a separated from each other in the axial direction, and at least one axial end face 110 of each support part 11a is provided with at least one buckle 111 or a buckle hole 131. Each support part 11a is buckled with a buckle hole 131 or a buckle 111 on at least one axial end cover 13 through the buckle 111 or the buckle hole 131 on at least one axial end face thereof, so that each support part 11a is abutted against each other to form the stator support 11.

[0052] The stator bracket 11 of the utility model adopts a split structure to facilitate the winding of the coil winding before assembly. During assembly, the clamping force of the axial end cover 13 is used to make the bracket parts 11a abut against each other to form the stator bracket 11.

[0053] Preferably, a limiting structure is used between two abutting bracket parts 11a to achieve abutment limiting.

[0054] The motor bracket structure of the utility model adopts a limiting structure to achieve the abutment limit between the two abutting bracket parts 11 a, so as to avoid positional deviation between the two abutting bracket parts 11 a.

[0055] The limiting structure includes a limiting groove 113 and a limiting block 114, one of the limiting groove 113 and the limiting block 114 is arranged on the abutting surface of one of the bracket parts 11a, and the other is arranged on the abutting surface of the other bracket part 11a. When the two bracket parts 11a are abutted, the limiting block 114 is embedded in the limiting groove 113.

[0056] Preferably, one abutting surface of each bracket portion 11 a is provided with the limiting groove 113 , and the other abutting surface is provided with the limiting block 114 .

[0057] Embodiment 4

[0058] like Figure 3As shown, a sonic wave motor comprises a plurality of coil windings 20, a plurality of magnet groups 30 and the motor support structure 10 described in Embodiment 1, Embodiment 2 or Embodiment 3, wherein each coil winding 20 is evenly arranged on the stator support 11 around the axial direction, and each magnet group 30 is evenly arranged on the rotor support 12 around the axial direction.

[0059] The sonic wave motor also includes an output shaft 40, one end of which is rotatably connected to the axis of one of the axial end covers 13, and is coaxially connected to the rotor bracket 12 after passing through the axial end cover 13. The rotor bracket 12 is provided with a plug hole on one end of the output shaft 40, and a plug-in portion is provided on one end of the output shaft 40 facing the rotor bracket 12. The plug-in portion is inserted into the plug hole to realize the connection between the output shaft 40 and the rotor bracket 12.

[0060] One end of the rotor support 12 is rotatably connected to one axial end cover 13 via the output shaft 40 , and the other end is provided with a rotating shaft and is rotatably connected to the other axial end cover 13 via the rotating shaft.

[0061] 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 motor support structure, comprising a stator support, a rotor support and two axial end covers, wherein the stator support has two axial end faces, and the two axial end covers are respectively arranged on the two axial end faces of the stator support; characterized in that: A snap-fit ​​structure is used between at least one axial end face of the stator support and the corresponding axial end cover to achieve detachable connection.

2. The motor support structure according to claim 1, characterized in that: The clamping structure includes a plurality of clamps and a plurality of clamping holes, one clamp corresponds to one clamping hole; one of the corresponding clamps and clamping holes is arranged on the axial end face of the stator bracket, and the other is arranged on the axial end cover corresponding to the axial end face; when the axial end face of the stator bracket is clamped with the axial end cover, the clamp is clamped into the clamping hole.

3. The motor support structure according to claim 1 or 2, characterized in that: A positioning structure is used between at least one axial end face of the stator support and the corresponding axial end cover to achieve connection and positioning.

4. The motor support structure according to claim 3, characterized in that: The positioning structure includes a plurality of positioning posts and a plurality of positioning holes, wherein one positioning post corresponds to one positioning hole; one of the corresponding positioning posts and positioning holes is arranged on the axial end face of the stator bracket, and the other is arranged on the axial end cover corresponding to the axial end face; when the axial end face of the stator bracket is engaged with the axial end cover, the positioning post is embedded in the positioning hole.

5. The motor support structure according to claim 4, characterized in that: Each buckle and each clamping hole is evenly distributed on the first circumference, each positioning column and each positioning hole is evenly distributed on the second circumference, and the first circumference and the second circumference are both centered on the axis of the stator bracket and the axial end cover; the diameter of the first circumference is greater than the diameter of the second circumference.

6. The motor support structure according to claim 2, characterized in that: The stator bracket includes at least two bracket parts separated around the axial direction, and at least one axial end face of each bracket part is provided with at least one buckle or buckle hole. Each bracket part is buckled with a buckle hole or buckle on at least one axial end cover through the buckle or buckle on at least one axial end face thereof, so that each bracket part abuts against each other to form the stator bracket.

7. The motor support structure according to claim 6, characterized in that: A limiting structure is used between two abutting bracket parts to achieve abutment limiting.

8. The motor support structure according to claim 7, characterized in that: The limiting structure includes a limiting groove and a limiting block, one of the limiting groove and the limiting block is arranged on the abutting surface of one of the bracket parts, and the other is arranged on the abutting surface of the other bracket part; when the two bracket parts are abutted, the limiting block is embedded in the limiting groove.

9. The motor support structure according to claim 1, characterized in that: A rotor assembly cavity is provided at the center of the stator bracket, and the rotor bracket is rotatably arranged in the rotor assembly cavity of the stator bracket. The axial ends of the rotor bracket are rotatably connected to two axial end covers respectively.

10. A sonic motor, characterized in that: It comprises a plurality of coil windings, a plurality of magnet groups and the motor support structure as claimed in claim 1, wherein each coil winding is evenly arranged on the stator support in the axial direction, and each magnet group is evenly arranged on the rotor support in the axial direction.

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