阅读说明：本技术 一种线性马达 (Linear motor ) 是由 张雨晴 董宇航 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种线性马达,所述线性马达包括振子、定子以及2个单悬臂弹片,所述振子包括振子主体,所述2个单悬臂弹片分别设置于所述振子主体的两端,每个所述单悬臂弹片呈具有缺口的环状设置,每个所述单悬臂弹片具有第一自由端和第二自由端,所述缺口形成于所述第一自由端和所述第二自由端之间,所述第一自由端连接所述振子,所述第二自由端连接所述定子。(The invention discloses a linear motor which comprises a vibrator, a stator and 2 single cantilever spring pieces, wherein the vibrator comprises a vibrator main body, the 2 single cantilever spring pieces are respectively arranged at two ends of the vibrator main body, each single cantilever spring piece is arranged in an annular shape with a notch, each single cantilever spring piece is provided with a first free end and a second free end, the notch is formed between the first free end and the second free end, the first free end is connected with the vibrator, and the second free end is connected with the stator.)

1. A linear motor, comprising:

a stator;

a vibrator including a vibrator body;

the single-cantilever elastic piece comprises 2 single-cantilever elastic pieces, wherein the 2 single-cantilever elastic pieces are respectively arranged at two ends of the vibrator main body, each single-cantilever elastic piece is annularly arranged with a notch, each single-cantilever elastic piece is provided with a first free end and a second free end, the notch is formed between the first free end and the second free end, the first free end is connected with the vibrator, and the second free end is connected with the stator.

2. The linear motor of claim 1, wherein the vibrator further comprises a first extension portion extending outward from the side of the vibrator body, the first extension portion being connected to the first free end.

3. The linear motor according to claim 2, wherein the linear motor includes 2 single-cantilever spring pieces, the vibrator includes 2 first extension portions, and an included angle formed by the 2 first extension portions on a plane perpendicular to an axial direction of the vibrator body is greater than or equal to 0 degree and less than or equal to 180 degrees.

4. The linear motor according to claim 2, wherein the first free end is formed with a mounting hole, and the first extension is formed with a catching portion to be fitted with the mounting hole.

5. The linear motor according to claim 1, further comprising a second extension portion formed by extending the second free end toward the stator, the second extension portion being connected to the stator.

6. The linear motor of claim 1, wherein the single cantilever spring is uniform in width.

7. The linear motor of claim 1, wherein the single cantilever spring is hollowed out.

8. The linear motor of claim 1, wherein the single cantilever spring is of a planar configuration.

Technical Field

The present invention relates to the field of electronic devices, and particularly to a linear motor.

Background

With the development of the linear motor industry, the linear motor is increasingly used in many products. In the current linear motor structure, the shape of the elastic sheet is V-shaped, C-shaped, Z-shaped, spiral, etc. Among them, the spiral spring is generally in the form of a multi-cantilever spring. In a specific motor structure, the modal simulation of the multi-cantilever spiral spring plate shows that a first-order mode is the resonance frequency of normal operation of a product, and the higher-order resonance frequency of a second-order mode, a third-order mode and the like is relatively lower. Wherein the order of the first order resonance frequency, the second order resonance frequency, the third order resonance frequency, etc. corresponds to the degree of freedom of the vibration of the object. 1 degree of freedom corresponds to 1 order. When the working frequency of a product is adjusted, the product is required to have a wider working frequency adjusting range, and the adjusting range is often between a first-order resonance frequency and a certain high-order resonance frequency according to needs, and a wider working frequency adjusting range cannot be provided due to the fact that the high-order frequency of the spiral spring piece assembly of the cantilever is lower in a specific motor structure. Therefore, a linear motor with a wide operating frequency adjustment range is needed.

Disclosure of Invention

The present invention is directed to a linear motor, so as to solve the problem of insufficient adjustment range of operating frequency in the linear motor in the prior art.

In order to solve the above problems, the present invention provides a linear motor, which includes a stator, a vibrator, and 2 single cantilever spring plates, wherein the vibrator includes a vibrator main body, the 2 single cantilever spring plates are respectively disposed at two ends of the vibrator main body, each single cantilever spring plate is disposed in an annular shape having a notch, each single cantilever spring plate has a first free end and a second free end, the notch is formed between the first free end and the second free end, the first free end is connected to the vibrator, and the second free end is connected to the stator.

In one embodiment, the vibrator further includes a first extension portion extending outward from the side surface of the vibrator body, and the first extension portion is connected to the first free end.

In an embodiment, the linear motor includes a plurality of single cantilever spring plates, the single cantilever spring plates are arranged along an axial direction of the vibrator main body at intervals, the vibrator includes a plurality of first extension portions, and the first extension portions are connected with the single cantilever spring plates in a one-to-one correspondence manner.

In an embodiment, the linear motor includes 2 single-cantilever spring pieces, the vibrator includes 2 first extension portions, and an included angle formed by the 2 first extension portions on a plane perpendicular to the axial direction of the vibrator body is greater than or equal to 0 degree and less than or equal to 180 degrees.

In one embodiment, the first free end is formed with a mounting hole, and the first extension is formed with a clamping portion matched with the mounting hole.

In an embodiment, the linear motor further includes a second extension portion formed by extending the second free end toward the stator, and the second extension portion is connected to the stator.

In one embodiment, the single cantilever spring plate has a uniform width.

In an embodiment, the single cantilever spring is hollow.

In one embodiment, the single cantilever spring plate is of a planar structure.

According to the technical scheme, the linear motor comprises a stator, a vibrator and 2 single cantilever spring pieces, the vibrator comprises a vibrator main body, the 2 single cantilever spring pieces are respectively arranged at two ends of the vibrator main body, each single cantilever spring piece is arranged in an annular shape with a notch, each single cantilever spring piece is provided with a first free end and a second free end, the notch is formed between the first free end and the second free end, the first free end is connected with the vibrator, and the second free end is connected with the stator. The linear motor with a wider working frequency adjusting range is provided by the invention because the higher-order resonance frequency of the single cantilever spring plate is higher than that of the cantilever spring plate when the single cantilever spring plate has the same first-order resonance frequency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of one embodiment of a linear motor of the present invention;

FIG. 2 is a schematic structural view of a single cantilever spring in FIG. 1;

FIG. 3 is a top view of the linear motor of the present invention;

FIG. 4 is an exploded view of one embodiment of the linear motor of the present invention;

FIG. 5 is an exploded view of another embodiment of the linear motor of the present invention;

FIG. 6 is an exploded view of yet another embodiment of the linear motor of the present invention;

fig. 7 is a schematic structural diagram of a multi-cantilever spring in the prior art.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Linear motor	11	Single cantilever spring
11a	First free end	11b	Second free end
				111	Mounting hole	112	Second extension part
12	Vibrator	121	Vibrator main body
				122	First extension part	122a	Clamping part
13	Stator

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

With the development of the linear motor industry, the linear motor is increasingly used in many products. In the current linear motor structure, the shape of the elastic sheet is V-shaped, C-shaped, Z-shaped, spiral, etc. Among them, the spiral spring is generally in the form of a multi-cantilever spring. Referring to fig. 7, fig. 7 is a schematic structural diagram of a linear motor with a multi-cantilever spring of the prior art. In a specific motor structure, the modal simulation of the multi-cantilever spiral spring plate shows that a first-order mode is the resonance frequency of normal operation of a product, and the higher-order resonance frequency of a second-order mode, a third-order mode and the like is relatively lower. Wherein the order of the first order resonance frequency, the second order resonance frequency, the third order resonance frequency, etc. corresponds to the degree of freedom of the vibration of the object. 1 degree of freedom corresponds to 1 order. When the working frequency of a product is adjusted, the product is required to have a wider working frequency adjusting range, and the adjusting range is often between a first-order resonance frequency and a certain high-order resonance frequency according to needs, and a wider working frequency adjusting range cannot be provided due to the fact that the high-order frequency of the spiral spring piece assembly of the cantilever is lower in a specific motor structure. Therefore, a linear motor with a wide operating frequency adjustment range is needed.

To solve the above problems, the present invention proposes a linear motor. Referring to fig. 1, 2, and 3, in an embodiment of the present invention, the linear motor 10 includes a stator 13, a vibrator 12, and 2 single-cantilever spring plates 11, the vibrator 12 includes a vibrator main body 121, the 2 single-cantilever spring plates are respectively disposed at two ends of the vibrator main body 121, each single-cantilever spring plate 11 is disposed in a ring shape having a gap, each single-cantilever spring plate 11 has a first free end 11a and a second free end 11b, the gap is formed between the first free end 11a and the second free end 11b, the first free end 11a is connected to the vibrator 12, and the second free end 11b is connected to the stator 13.

Specifically, the present invention performs simulation on both the multi-cantilever spring plate in the prior art and the single-cantilever spring plate 11 in the present invention, so as to obtain a range from the second-order resonance frequency to the sixth-order resonance frequency of the single-cantilever spring plate 11 and the multi-cantilever spring plate on the premise that the two have similar first-order resonance frequencies. The specific simulation test results of the single cantilever spring plate 11 and the multi-cantilever spring plate are as follows:

order of the scale	Resonant frequency/Hz of single cantilever spring	Resonant frequency/Hz of multi-cantilever spring
			1	60.293	58.422
2	343.25	252.20
			3	516.35	276.35
4	620.51	276.73
			5	622.02	359.47
6	748.23	459.49

It can be seen that the present invention provides a linear motor 10 having a single cantilever spring 11. Compared with the multi-cantilever dome in the prior art, the single-cantilever dome 11 and the multi-cantilever dome 11 have significantly higher second-order resonance frequency to sixth-order resonance frequency than the multi-cantilever dome when the single-cantilever dome 11 and the multi-cantilever dome have similar first-order resonance frequencies (60.293Hz and 58.422Hz, both close to 60 Hz). Thus, the present invention provides a linear motor 10 having a single cantilever spring 11, wherein the single cantilever spring 11 has a higher high-order resonant frequency, especially a higher second-order resonant frequency. Thus, the linear motor 10 of the present invention has a wide adjustment range of the operating frequency. Furthermore, the single-cantilever spring plate 11 has a simpler structure, is more convenient to process, has relatively simple and easy assembly difficulty, saves the production cost and improves the product competitiveness compared with the multi-cantilever spring plate.

In an embodiment, the vibrator 12 further includes a first extending portion 122, the first extending portion 122 extends outward from the side of the vibrator body 121, and the first extending portion 122 is connected to the first free end 11 a. Specifically, the vibrator 12 moves up and down along the axial direction of the vibrator body 121. And the vibrator 12 is connected with the stator 13 through the single cantilever spring plate 11. When the vibrator 12 vibrates, the single cantilever spring plate 11 is elastically deformed. Further, the single cantilever spring plate 11 is in a notched annular arrangement, that is, the single cantilever spring plate 11 may be in an annular arrangement, or may be in a square annular structure or a zigzag annular structure. In an embodiment, the single cantilever spring plate 11 is arranged in a notched ring shape, the vibrator 12 is arranged on a central axis of the ring, and the vibrator 12 vibrates along the central axis of the ring. In an embodiment, the 2 single-cantilever spring pieces 11 are disposed at intervals along the vibrator body 121 and at two ends of the vibrator body 121, so as to realize stable vibration of the vibrator 12.

Referring to fig. 4 to 6, in an embodiment, the linear motor 10 includes 2 single-cantilever spring pieces 11, the vibrator 12 includes 2 first extending portions 122, and an included angle formed by the 2 first extending portions 122 on a plane perpendicular to an axial direction of the vibrator body 121 is greater than or equal to 0 degree and less than or equal to 180 degrees. Specifically, a plane perpendicular to the transducer body 121 is referred to as a standard plane. The included angle formed by the projection of the 2 first extending portions 122 on the standard surface may be any one angle between 0 degree and 180 degrees. The angle can be changed by adjusting the position of the 2 first extension parts 122 to produce vibrators 12 with different models and specifications. Moreover, 2 identical single cantilever spring pieces 11 can be adopted and mounted on the first extension parts 122 with different positions, so as to adjust the relative position between the two single cantilever spring pieces 11. Specifically, fig. 4 to 6 show three embodiments in which the included angle is 0 degree, the included angle is 180 degrees, and the included angle is an angle between 0 degree and 180 degrees, respectively.

Further, the 2 single cantilever spring pieces 11 are respectively arranged along the axial direction of the vibrator body 121 at intervals and are arranged at the upper end and the lower end of the vibrator body 121. In one embodiment, in order to better connect the vibrator 12 and the stator 13 and avoid polarization, the 2 single cantilever springs 11 are arranged in parallel along the axial direction of the vibrator body 121.

In an embodiment, the first free end 11a is formed with a mounting hole 111, and the first extending portion 122 is formed with a clamping portion 122a matching with the mounting hole 111. Specifically, the vibrator 12 is connected to the mounting hole 111 of the single-cantilever spring plate 11 through the clamping portion 122a of the first extension portion 122 in a matching manner, so that the single-cantilever spring plate 11 can achieve the effect of transmitting vibration. Further, in an embodiment, the single cantilever spring plate 11 may not be provided with the mounting hole 111, and the first free end 11a and the first extending portion 122 may also be fixedly connected in a matching manner in other manners as long as the vibration effect of the vibrator 12 can be transmitted.

In an embodiment, the linear motor 10 further includes a second extension portion 112, the second extension portion 112 is formed by extending the second free end 11b toward the stator 13, and the second extension portion 112 is connected to the stator 13. Specifically, the vibrator 12 is disposed inside the stator 13, and the single cantilever spring plate 11 is disposed between the stator 13 and the vibrator 12. In this way, the linear motor 10 is formed with the second extension portion 112, and the second extension portion 112 connects the stator 13 and the single cantilever spring 11. For the sake of processing convenience, the second extension part 112 and the single cantilever spring 11 are integrally disposed. And in one embodiment, the stator 13 and the second extension 112 are fixedly connected by welding.

In one embodiment, the single cantilever spring 11 has a uniform width. The structure is simple, and the processing is more convenient. However, in the technical solution of the present invention, the width of the single cantilever spring 11 may also be varied, and in an embodiment, the width of the single cantilever spring 11 may be appropriately adjusted according to actual conditions.

In one embodiment, the single cantilever spring 11 is hollow. Optionally, the single cantilever spring 11 may be a solid structure, and one or more hollow portions may also be disposed on the single cantilever spring 11. The arrangement of the hollow-out part has the effects of reducing materials, reducing weight and saving cost.

In one embodiment, the single cantilever spring 11 is a planar structure. Specifically, when the vibrator 12 does not vibrate and the single cantilever spring 11 is mounted. The single cantilever spring plate 11 is of a plane structure. At this time, the first free end 11a, the second free end 11b, and the main body of the annular single cantilever spring 11 all lie on a plane. This arrangement reduces the difficulty of machining the linear motor 10. When the vibrator 12 vibrates up and down along the axial direction of the vibrator body 121, the single cantilever spring 11 is elastically deformed in a spiral shape to transmit the vibration. Specifically, the single cantilever spring plate 11 is of a planar structure when being statically mounted, and the single cantilever spring plate 11 deforms into a spiral shape when vibration needs to be transmitted.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.