Oscillation linear motor

Abstract

The utility model relates to an oscillation linear motor, comprising a housing; the stator assembly is fixed in the shell; the two first elastic pieces are arranged in the shell, are distributed at intervals in the first direction and are located on the two sides of the stator assembly, and the first elastic pieces can generate elastic deformation in the first direction; the two ends of the mover assembly are connected to the first elastic pieces respectively, and the mover assembly corresponds to the stator assembly in the second direction; the output shaft is fixedly connected to one of the two first elastic pieces and extends in the first direction; the two second elastic pieces are distributed in the first direction at intervals and located on the sides, away from the output shaft, of the first elastic pieces, and the second elastic pieces can generate elastic deformation in the first direction; the balancing weight is mounted between the two second elastic sheets through a mounting shaft; the stator assembly and the rotor assembly can interact to drive the output shaft to reciprocate in the first direction. The utility model has the advantages of simple structure, large torque, easy heat dissipation, easy assembly and small vibration amplitude of the shell.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to an oscillating linear motor. Background Technology

[0002] Miniature motors are widely used in various electric products, such as electric toothbrushes and electric toys. However, existing miniature motors have some shortcomings. First, their complex structure hinders assembly efficiency and production cost control. Second, most miniature motors use a closed structure, resulting in poor heat dissipation. In high-frequency vibration operation, inadequate heat dissipation directly affects product performance; therefore, heat dissipation urgently needs improvement. Furthermore, the casing of miniature motors is prone to vibration along with the actuator, and the vibration amplitude is relatively large, which degrades the user experience.

[0003] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an oscillating linear motor, which has a simple structure, large torque, easy heat dissipation, easy assembly, and small vibration amplitude of the housing.

[0005] To address the aforementioned problems, this utility model provides an oscillating linear motor, comprising: a housing extending along a first direction; a stator assembly fixed within the housing; two first spring plates disposed within the housing, spaced apart along the first direction and located on opposite sides of the stator assembly, the first spring plates capable of elastic deformation along the first direction; a mover assembly connected at both ends to the first spring plates and corresponding to the stator assembly in a second direction; an output shaft fixed to one of the two first spring plates, extending along the first direction and passing through the housing; two second spring plates disposed within the housing, spaced apart along the first direction and located on the side of the first spring plate away from the output shaft, the second spring plates capable of elastic deformation along the first direction; and a counterweight mounted between the two second spring plates via a mounting shaft; wherein the stator assembly and the mover assembly interact to drive the output shaft to reciprocate along the first direction.

[0006] Preferably, the plane on which the second spring is located is perpendicular to the first direction and is spiral-shaped. A portion of the outer edge of the second spring is fixed to the housing. The inner end of the second spring has a second spring mounting hole for mounting the mounting shaft.

[0007] Preferably, the plane containing the first spring is perpendicular to the first direction and is spiral-shaped, a portion of the outer edge of the first spring is fixed to the housing, and the inner end of the first spring is used to be mounted on the output shaft and the actuator assembly.

[0008] Preferably, the outer edges of the first spring and the second spring each have a first protrusion and a second protrusion, the first protrusion extending along a second direction and the second protrusion extending along a third direction; the second direction is perpendicular to the third direction and to the first direction respectively; the housing has a first slot and a second slot, the first protrusion engaging with the first slot and the second protrusion engaging with the second slot.

[0009] Preferably, the mover assembly includes: a mover core, with both ends connected to the first spring piece; and a plurality of magnets, which are spaced apart on the mover core along a first direction and facing the stator assembly.

[0010] Preferably, the mover core includes an integrally formed: a support portion, two connecting portions, and two sets of positioning portions; the two connecting portions extend from the two ends of the support portion along a first direction in a direction away from each other and are inclined towards the stator assembly; the two sets of positioning portions extend from their respective corresponding connecting portions along the first direction in a direction away from each other; wherein, the inner end of the first spring has a positioning hole corresponding to the positioning portion, and the positioning portion of the mover core is engaged with the positioning hole.

[0011] Preferably, the end of the connecting portion away from the bearing portion has a matching plane that fits with the first spring sheet, and the positioning portion extends outward from the matching plane along a first direction.

[0012] Preferably, the support portion has a plurality of mounting slots distributed along a first direction, the openings of the mounting slots facing the stator assembly, and the mounting slots are used to mount the magnets; the magnetic poles of two adjacent magnets along the first direction facing the stator assembly are opposite.

[0013] Preferably, the stator assembly includes: a stator core fixed inside the housing, the stator core having a magnetic shoe portion facing the mover core, the magnetic shoe portion being perpendicular to the first direction; and a coil sleeved on the magnetic shoe portion.

[0014] Preferably, the housing includes a first plate and a second plate connected to each other and perpendicular to each other; the first plate has a heat dissipation vent and a third slot located on both sides of the heat dissipation vent; the stator assembly has a third protrusion that engages with the third slot.

[0015] This invention relates to an oscillating linear motor in which the mover assembly and output shaft are mounted on a first spring plate. The first spring plate is capable of elastic deformation along a first direction, enabling the mover assembly and output shaft to vibrate at high frequency in that direction. Under the action of the first spring plate, the mover assembly and output shaft can easily reverse direction, thereby improving the torque of the motor. Furthermore, the placement of the mover assembly and output shaft on the first spring plate reduces noise during reciprocating movement, thus reducing the noise of the motor. A second spring plate is also capable of elastic deformation along the first direction, and a counterweight is mounted on the two second spring plates, which reduces the vibration amplitude of the housing, effectively mitigating housing vibration.

[0016] The device of this invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the particular principles of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the oscillating linear motor according to the embodiment of this utility model;

[0018] Figure 2 A schematic diagram of an oscillating linear motor without its housing;

[0019] Figure 3 An exploded 3D view of an oscillating linear motor;

[0020] Figure 4 This is a schematic diagram of the shell structure;

[0021] Figure 5 This is a schematic diagram of the structure of the first fragment;

[0022] Figure 6 This is a schematic diagram of the second spring;

[0023] Figure 7 This is a schematic diagram of the moving core structure.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Housing; 101. First slot; 102. Second slot; 103. Heat dissipation vent; 104. Third slot; 110. First plate; 120. Second plate;

[0026] 200. Stator assembly; 210. Stator core; 211. Magnetic shoe section; 212. Third protrusion; 220. Coil; 230. Coil frame; 231. Coil frame body; 232. Baffle;

[0027] 300, First spring clip; 301, First protrusion; 302, Second protrusion; 303, Positioning hole; 304, First spring clip mounting hole; 310, Inner ring; 320, Outer ring;

[0028] 400. Mover assembly; 410. Mover core; 411. Bearing part; 412. Connecting part; 413. Positioning part; 414. Matching plane; 415. Mounting slot; 416. Tip; 417. Notch; 420. Magnet;

[0029] 500, Output shaft;

[0030] 600, Second spring clip; 601, Second spring clip mounting hole; 610, Inner ring; 620, Outer ring;

[0031] 700, counterweight;

[0032] 800. Install the shaft;

[0033] 900, end plate.

[0034] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.

[0035] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation

[0036] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.

[0037] The following is combined Figures 1 to 7 The oscillating linear motor of this utility model will be described.

[0038] like Figures 1 to 3 As shown, the oscillating linear motor of this utility model includes: a housing 100, a stator assembly 200, two first spring plates 300, a mover assembly 400, an output shaft 500, two second spring plates 600, and a counterweight 700.

[0039] The length of the housing 100 extends along a first direction and is used to support the stator assembly 200, two first springs 300, the mover assembly 400, the output shaft 500, two second springs 600, and the counterweight 700.

[0040] The stator assembly 200 is fixed inside the housing 100.

[0041] Two first spring plates 300 are disposed inside the housing 100 and are spaced apart along the first direction, and are located on both sides of the stator assembly 200. The first spring plates 300 can generate elastic deformation along the first direction, thereby satisfying the reciprocating movement of the output shaft 500 in the first direction.

[0042] The two ends of the mover assembly 400 are respectively connected to the first spring 300 and can reciprocate along the first direction, and correspond to the stator assembly 200 in the second direction.

[0043] The output shaft 500 is fixed to one of the two first springs 300, extends along a first direction, and protrudes from the housing 100.

[0044] Two second springs 600 are disposed inside the housing 100 and are spaced apart along the first direction, and are located on the side of the first spring 300 away from the output shaft 500. The second springs 600 are capable of elastic deformation along the first direction.

[0045] The counterweight 700 is mounted between the two second spring plates 600 via the mounting shaft 800.

[0046] The stator assembly 200 and the mover assembly 400 interact to drive the output shaft 500 to reciprocate along a first direction. When powered on, the mover assembly 400 and the stator assembly 200 interact, causing the mover assembly 400 to reciprocate along the first direction, which in turn drives the output shaft 500 to reciprocate along the first direction.

[0047] Since the mover assembly 400 and the output shaft 500 are mounted on the first spring 300, the first spring 300 can elastically deform along the first direction, allowing the mover assembly 400 and the output shaft 500 to vibrate at high frequency in the first direction. Under the action of the first spring 300, the mover assembly 400 and the output shaft 500 can easily reverse direction, which helps to increase the torque of the motor device. In addition, since the mover assembly 400 and the output shaft 500 are mounted on the first spring 300, they are less likely to generate noise during reciprocating movement, which helps to reduce the noise of the motor device. The second spring 600 can elastically deform along the first direction, and the counterweight 700 is mounted on the two second springs 600, which can reduce the vibration amplitude of the housing 100, thereby effectively mitigating the vibration of the housing 100.

[0048] In an exemplary implementation, such as Figures 1 to 3 As shown, the plane containing the second spring 600 is perpendicular to the first direction and is spiral-shaped. A portion of the outer edge of the second spring 600 is fixed to the housing 100, and the inner end of the second spring 600 has a second spring mounting hole 601 (see...). Figure 6 The second spring plate mounting hole 601 is used to install the mounting shaft 800.

[0049] The second shrapnel 600 is sheet-shaped, and the material used to make the second shrapnel 600 is not limited. As a preferred option, it can be made of metal.

[0050] like Figure 6 As shown, a hollow space is formed between the inner ring 610 and the outer ring 620 of the second spring 600, thus giving it elastic deformation capability.

[0051] In an exemplary implementation, such as Figures 1 to 3 As shown, the plane of the first spring 300 is perpendicular to the first direction and is spiral-shaped. A portion of the outer edge of the first spring 300 is fixed to the housing 100, and the inner end of the first spring 300 is used to be installed on the output shaft 500 and the mover assembly 400.

[0052] The first shrapnel 300 is in the shape of a sheet, and the material used to make the first shrapnel 300 is not limited. As a preferred option, it can be made of metal.

[0053] like Figure 5 As shown, a hollow space is formed between the inner ring 310 and the outer ring 320 of the first spring piece 300, thus giving it the ability to deform elastically.

[0054] In an exemplary implementation, such as Figure 5 and Figure 6 As shown, the outer edge of the first spring 300 and the outer edge of the second spring 600 both have a first protrusion 301 and a second protrusion 302. The first protrusion 301 extends along a second direction, and the second protrusion 302 extends along a third direction.

[0055] The second direction is perpendicular to the third direction and to the first direction respectively.

[0056] like Figure 4 As shown, the housing 100 has a first slot 101 and a second slot 102. The first protrusion 301 is engaged in the first slot 101, and the second protrusion 302 is engaged in the second slot 102, so that a portion of the outer edge of the first spring 300 is fixed to the housing 100, and a portion of the outer edge of the second spring 600 is fixed to the housing 100.

[0057] The first protrusion 301 and the second protrusion 302 extend in different directions, so that the first spring 300 can be more stable by engaging it from different sides.

[0058] In an exemplary implementation, such as Figure 5 As shown, the inner end of the first spring plate 300 is provided with a first spring plate mounting hole 304, and the end of the output shaft 500 is mounted in the first spring plate mounting hole 304, thereby connecting the output shaft 500 and the first spring plate 300 together. Preferably, the output shaft 500 and the first spring plate mounting hole 304 are interference-fitted, so that the output shaft 500 and the first spring plate 300 can move together in a first direction.

[0059] In an exemplary implementation, such as Figure 3 As shown, the mover assembly 400 includes: a mover core 410 and a plurality of magnets 420.

[0060] The two ends of the moving iron core 410 are respectively connected to the first spring 300.

[0061] Multiple magnets 420 are spaced apart on the mover core 410 along a first direction and face the stator assembly 200.

[0062] In an exemplary implementation, such as Figure 7 As shown, the moving core 410 includes, integrally formed, a bearing portion 411, two connecting portions 412, and two sets of positioning portions 413.

[0063] The two connecting portions 412 extend from the two ends of the support portion 411 along the first direction away from each other and tilt toward the stator assembly 200.

[0064] Two sets of positioning parts 413 extend from their respective corresponding connecting parts 412 along a first direction in a direction away from each other. Figure 7 In the implementation scheme, each group of positioning units 413 includes two positioning units.

[0065] Among them, such as Figure 5 As shown, the inner end of the first spring 300 has a positioning hole 303 corresponding to the positioning part 413. The positioning part 413 of the moving iron core 410 is engaged in the positioning hole 303, so that the moving iron core 410 is connected to the first spring 300 and is not easy to separate along the first direction.

[0066] In an exemplary implementation, such as Figure 7 As shown, the positioning part 413 is provided with relatively spaced tips 416, and a notch 417 that gradually narrows from the outside to the inside is formed between the two tips 416, so that the positioning part 413 can be inserted into the positioning hole 303.

[0067] In an exemplary implementation, such as Figure 7 As shown, the end of the connecting part 412 away from the bearing part 411 has a matching plane 414 that fits against the first spring piece 300, and the positioning part 413 extends outward from the matching plane 414 along the first direction.

[0068] In an exemplary implementation, such as Figure 7 As shown, the support portion 411 has a plurality of mounting slots 415 distributed along a first direction, the openings of the mounting slots 415 facing the stator assembly 200, and the mounting slots 415 are used to mount magnets 420.

[0069] The magnetic poles of two adjacent magnets 420 facing the stator assembly 200 are opposite along the first direction. When the direction of the current flowing through the coil 220 changes, the coil 220 can interact with different magnets 420 to drive the magnets 420 to move, thereby driving the entire mover assembly 400 to reciprocate.

[0070] The number of mounting slots 415 is related to the number of magnets 420. The shape of the mounting slots 415 matches the shape of the magnets 420.

[0071] In an exemplary implementation, such as Figure 3 As shown, the stator assembly 200 includes a stator core 210 and a coil 220.

[0072] The stator core 210 is fixed inside the housing 100. The stator core 210 is provided with a magnetic shoe portion 211 facing the mover core 410. The magnetic shoe portion 211 is perpendicular to the first direction.

[0073] The coil 220 is mounted on the magnetic shoe section 211.

[0074] In an exemplary implementation, such as Figure 3 As shown, a coil frame 230 is also provided between the coil 220 and the magnetic shoe portion 211. The coil frame 230 is used to insulate and isolate the coil 220 and the magnetic shoe portion 211. In addition, the coil frame 230 can also prevent the coil 220 from becoming loose.

[0075] In an exemplary implementation, such as Figure 3 As shown, the coil frame 230 includes a cylindrical coil frame body 231 and baffles 232 located at both ends of the coil frame body 231. The internal cavity of the coil frame body 231 passes through the baffles 232. The coil frame body 231 is fitted onto the magnetic boot portion 211, and the baffles 232 are flush with the ends of the magnetic boot portion 211. The coil 220 is fitted onto the coil frame body 231 and is constrained by the baffles 232.

[0076] To maximize heat dissipation and ensure the secure mounting of the first spring contact 300 and the second spring contact 600, the housing 100 is open and includes a first plate 110 and a second plate 120 that are connected to each other and perpendicular to each other (see...). Figure 4 The vertical here includes 90° vertical and near 90° vertical.

[0077] The first plate 110 and the second plate 120 can be flat or non-flat, depending on the specific requirements. Preferably, they can be planar or near-planar.

[0078] The first plate 110 has a heat dissipation vent 103 and third slots 104 located on both sides of the heat dissipation vent 103. The first slot 101 is disposed on the first plate 110, and the second slot 102 is disposed on the second plate 120.

[0079] like Figure 3 As shown, the stator assembly 200 has a third protrusion 212, which is engaged with the third slot 104. Specifically, the third protrusion 212 is disposed on the stator core 210.

[0080] When the stator core 210 is mounted on the first plate 110, the heat dissipation vent 103 corresponds to the stator core 210, thereby facilitating heat dissipation.

[0081] For ease of installation, the second slot 102 is located at the edge of the second plate 120, thus making the second slot 102 open.

[0082] In an exemplary implementation, such as Figure 1 and Figure 3 As shown, end plates 900 are provided at both ends of the housing 100 in the first direction.

[0083] Thus, the oscillating linear motor of this utility model is formed, and its working principle is as follows:

[0084] When coil 220 is energized, a virtual magnetic pole is generated on magnetic shoe 211. This virtual magnetic pole interacts with magnet 420 in mover assembly 400: like poles attract and unlike poles repel, thereby driving magnet 420 to move along the first direction. When the current in coil 220 changes alternately, the polarity of the virtual magnetic pole changes alternately, thereby driving magnet 420 to reciprocate. In this way, mover assembly 400 can be driven to reciprocate along the first direction, which in turn drives output shaft 500 to reciprocate along the first direction.

[0085] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “above,” “below,” “upward,” “downward,” “front,” “back,” “behind,” “inner side,” “outer side,” “inward,” “outer,” “internal,” “external,” “inner,” “external,” “forward,” and “backward” are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0086] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A resonant linear motor, characterized by, Comprising: a housing, a length of which extends along a first direction; a stator assembly fixed in the housing; two first elastic sheets arranged in the housing and spaced apart along the first direction and located on two sides of the stator assembly, the first elastic sheets being capable of elastically deforming along the first direction; a mover assembly connected to the first elastic sheets at two ends thereof and corresponding to the stator assembly in a second direction; an output shaft fixed to one of the two first elastic sheets and extending along the first direction and protruding out of the housing; two second elastic sheets arranged in the housing and spaced apart along the first direction and located on a side of the first elastic sheets away from the output shaft, the second elastic sheets being capable of elastically deforming along the first direction; and a counterweight mounted between the two second elastic sheets through a mounting shaft; wherein the stator assembly and the mover assembly can interact to drive the output shaft to reciprocate along the first direction.

2. The oscillating linear motor of claim 1, wherein A plane in which the second elastic sheet is located is perpendicular to the first direction and is in a spiral shape, a part of an outer edge of the second elastic sheet is fixed to the housing, and an inner end of the second elastic sheet has a second elastic sheet mounting hole for mounting the mounting shaft.

3. The oscillating linear motor of claim 2, wherein, A plane in which the first elastic sheet is located is perpendicular to the first direction and is in a spiral shape, a part of an outer edge of the first elastic sheet is fixed to the housing, and an inner end of the first elastic sheet is used for mounting the output shaft and the mover assembly.

4. The oscillating linear motor of claim 3, wherein The outer edge of the first elastic sheet and the outer edge of the second elastic sheet each have a first protruding portion and a second protruding portion, the first protruding portion extends along a second direction, and the second protruding portion extends along a third direction; the second direction is perpendicular to the third direction and is perpendicular to the first direction respectively. The housing has a first clamping groove and a second clamping groove, the first protruding portion is clamped at the first clamping groove, and the second protruding portion is clamped at the second clamping groove.

5. The oscillating linear motor of claim 2, wherein, The mover assembly comprises: a mover core connected to the first elastic sheets at two ends thereof; and a plurality of magnets arranged on the mover core along the first direction and facing the stator assembly.

6. The oscillating linear motor of claim 5, wherein, The mover core comprises a carrier portion, two connecting portions, and two sets of positioning portions formed integrally; the two connecting portions extend away from each other from two ends of the carrier portion along the first direction and are inclined toward the stator assembly; the two sets of positioning portions extend away from each other from the respective connecting portions along the first direction; wherein the inner end of the first elastic sheet has a positioning hole corresponding to the positioning portion, and the positioning portion of the mover core is clamped at the positioning hole.

7. The oscillating linear motor of claim 6, wherein, An end of the connecting portion away from the carrier portion has a matching plane abutting the first elastic sheet, and the positioning portion extends outwardly from the matching plane along the first direction.

8. The oscillating linear motor of claim 7, wherein, The carrier portion has a plurality of mounting grooves distributed along the first direction, the opening of the mounting groove faces the stator assembly, and the mounting groove is used for mounting the magnet; the poles of two adjacent magnets facing the stator assembly are opposite in direction.

9. The oscillating linear motor of claim 5, wherein, The stator assembly comprises: A stator core fixed in the housing, the stator core being provided with a magnetic shoe portion toward the mover core, the magnetic shoe portion being perpendicular to the first direction; and A coil sleeved on the magnetic shoe portion.

10. The resonant linear motor of claim 1, wherein, The housing comprises a first plate and a second plate connected to each other and perpendicular to each other; The first plate has a heat dissipation opening and a third clamping groove located on both sides of the heat dissipation opening; The stator assembly has a third protruding portion, and the third protruding portion is clamped at the third clamping groove.

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