Linear motor with improved construction

Abstract

The utility model discloses a linear motor with improved structure, including support, set up in the stator subassembly of support inside, rotor subassembly and swing frame, the support includes support body and sets up the base at support body bottom, and the stator subassembly is fixedly connected with the base, and the base is fixedly connected with the shell fragment, and the free end of shell fragment is connected to swing frame, to make swing frame activity suspend in the upper of stator subassembly, and the rotor subassembly includes rotor and rotor mounting frame, and the rotor is fixedly connected to rotor mounting frame, and rotor mounting frame is fixedly connected to swing frame, and the lower end surface of swing frame is provided with a plurality of convex edges, and a plurality of convex edges are formed around and form the accommodation groove, and the rotor subassembly is installed in the accommodation groove. The structure design makes the positioning installation between rotor, rotor mounting frame and swing frame more accurate, which not only makes the reciprocating motion amplitude of electric clipper head keep balanced, avoids the strength weak and strong, ensures that the hair length that cuts is uniform, but also can prevent the hair problem caused by the strength mutation.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a linear motor with an improved structure. Background Technology

[0002] Electric tools such as hair clippers and shavers require linear motors to drive the blades to move back and forth at a high frequency to cut hair. The most commonly used linear motors are electromagnetic vibration motors. Their working principle is to wind coils on the stator and fix the mover on the rotor. When the coil is energized with alternating current, the stator has magnetic poles. The attraction or repulsion between the stator and the different magnetic poles of the mover causes the mover to swing back and forth. When the motor stops working, the mover needs to be reset to the initial center position.

[0003] A linear motor device, as disclosed in Chinese Utility Model Patent (Authorization Announcement No.: CN219960373U), includes an iron core, a coil, a rocker arm assembly, a mover assembly, and an output shaft. The mover assembly is fixedly mounted on the rocker arm assembly. The rocker arm assembly includes a connecting piece, a swing rod, and a magnet frame. The swing rod includes a first main body and a second main body that are perpendicular to each other. The magnet frame is fitted and connected to the first main body, and has several mover mounting slots. It also includes fixing frames distributed on both sides of the coil. One end of the fixing frame is fixedly connected to a fixing seat, and the other end of the fixing frame is mated and connected. The fixing frames are provided with lugs, and the two sides of the fixing frames are mated and connected through the lugs. It features a simple structure, easy heat dissipation, high power, low noise, long service life, and small size.

[0004] However, the linear motor device disclosed in the prior art has the following defects: although the magnet frame and the first main body of the swing rod are connected in a fitting manner and fixed at both ends with screws, the fitting surfaces of the two are both flat. This structure is prone to misalignment of the connection between the two, which will cause the reciprocating motion amplitude of the electric clipper head to be unstable, sometimes too strong and sometimes too weak. Not only is it difficult to cut hair of uniform length, but it may also cause pain to the user due to sudden changes in force pulling the hair.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a linear motor with an improved structure, resulting in a more stable output and effectively reducing noise during operation. This not only ensures a balanced reciprocating motion of the electric clipper head, preventing sudden changes in force and guaranteeing uniform hair length, but also prevents hair-pulling problems caused by sudden changes in force, reducing user pain.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A linear motor with an improved structure includes a bracket, a stator assembly, a mover assembly and a swing frame disposed inside the bracket. The mover assembly corresponds to and cooperates with the stator assembly. The bracket includes a bracket body and a base disposed at the bottom end of the bracket body. The stator assembly is fixedly connected to the base. The base is fixedly connected with a spring piece, and the free end of the spring piece is connected to the swing frame, so that the swing frame is movably suspended above the stator assembly. The mover assembly includes a mover and a mover mounting frame. The mover is fixedly connected to the mover mounting frame, and the mover mounting frame is fixedly connected to the swing frame. A plurality of convex ridges are provided on the lower end surface of the swing frame, and the plurality of convex ridges surround to form a receiving groove. The mover assembly is installed in the receiving groove.

[0009] Further, a plurality of notch grooves corresponding to the convex ridges are provided on the mover mounting frame.

[0010] Further, the bracket body includes a first frame body and a second frame body, and convex ears are radially extended and provided on both sides of the first frame body and the second frame body.

[0011] Further, through holes are provided on the convex ears.

[0012] Further, a convex column is provided on the convex ear of the first frame body, and a groove corresponding to the convex column is provided on the convex ear of the second frame body. The first frame body and the second frame body are positioned by the engagement of the convex column and the groove.

[0013] Further, a convex column is provided on one side convex ear of the first frame body, and a groove is provided on the other side convex ear; a groove is provided on the convex ear of the second frame body corresponding to the convex column of the first frame body, and a convex column is provided on the convex ear corresponding to the groove of the first frame body. The first frame body and the second frame body are positioned by the engagement of the convex column and the groove.

[0014] Further, two swing frames are provided above the stator assembly, and the two swing frames are arranged side by side along the first direction.

[0015] Further, the stator assembly includes an iron core and a coil. The iron core includes a first magnetic shoe portion and a second magnetic shoe portion which are spaced apart from each other, and the coils are respectively wound around the outside of the first magnetic shoe portion and the second magnetic shoe portion.

[0016] Further, an installation opening is provided on the base, and the iron core is in interference fit with the installation opening.

[0017] Further, a convex portion is provided at the center of the swing frame, and first convex platforms are provided on both sides of the convex portion; extension portions are axially provided at the upper ends of the first frame body and the second frame body, and second convex platforms corresponding to the first convex platforms are provided on the extension portions. A spring is provided between the first convex platform and the second convex platform.

[0018] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0019] (1) For a linear motor with an improved structure according to the present utility model, a plurality of convex ridges are provided on the lower end surface of the swing frame, and the plurality of convex ridges surround to form a receiving groove, and the rotor assembly is installed in the receiving groove. During installation, the rotor mounting frame is embedded in the receiving groove, and the convex ridges are inserted into the notch grooves. The convex ridges of the swing frame form circumferential limitation on the rotor mounting frame, and then the two are fixedly connected by screws, which can effectively prevent the rotor mounting frame from shifting relative to the swing frame. Then, the rotor is fixedly connected to the lower end surface of the rotor mounting frame by glue. At this time, the convex ridges of the swing frame separate the rotors and limit the rotors to prevent the rotors from shifting. This structural design makes the positioning and installation between the stator, the rotor mounting frame and the swing frame more accurate and reliable, without shifting, thereby making the output of the linear motor more stable and effectively reducing the noise during operation. This can not only keep the reciprocating movement amplitude of the electric hair clipper head balanced, avoid the strength from being too strong or too weak, ensure that the cut hair length is uniform, but also prevent the hair pulling problem caused by the sudden change of strength and reduce the pain of the user.

[0020] (2) For a linear motor with an improved structure according to the present utility model, the bracket includes a first frame body and a second frame body, and convex ears are radially extended on both sides of the first frame body and the second frame body. During installation, the first frame body and the second frame body are quickly and accurately positioned through the fitting of the convex columns and the grooves, making the cooperation between the first frame body and the second frame body more stable, so that the motor output is more stable and the noise is significantly reduced. This can not only reduce the extra vibration and noise during the operation of the cutter head, improve the hair cutting comfort of the user, but also reduce the wear of the cutter head and the motor, extend the service life of the electric hair clipper, and at the same time reduce the possibility of the cutter head getting stuck due to the loosening of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the specific embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is the overall structural schematic diagram of the present utility model;

[0023] Figure 2 is the overall structural explosion diagram of the present utility model;

[0024] Figure 3 is the schematic diagram of the mating connection of the swing frame, the rotor mounting frame and the rotor of the present utility model;

[0025] Figure 4 is a perspective view of the swing frame of the present utility model;

[0026] Figure 5 is a perspective view of the mover mounting bracket of the present utility model;

[0027] Figure 6 is a perspective view of the first frame body of the present utility model.

[0028] Figures 1 to 6 The reference numerals in the figure are:

[0029] 1, bracket; 11, bracket body; 111, first frame body; 1111, lug; 11111, through hole; 11112, convex column; 11113, groove; 1112, extension part; 11121, second boss; 112, second frame body; 12, base; 121, mounting port; 2, stator assembly; 21, iron core; 211, first magnetic shoe part; 212, second magnetic shoe part; 3, mover assembly; 31, mover; 32, mover mounting bracket; 321, notch groove; 4, swing frame; 41, convex rib; 42, receiving groove; 43, protruding part; 431, first boss; 432, swing rod; five, shrapnel; 6, spring. Detailed implementation manners

[0030] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the present utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0032] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, if the term "plural" appears, the meaning of the term "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present utility model are for illustrative purposes only and do not represent the only implementation.

[0036] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0037] As Figures 1 to 6As shown in the figure, a linear motor with an improved structure includes a bracket 1, a stator assembly 2, a mover assembly 3 and a swing frame 4 disposed inside the bracket 1. The mover assembly 3 corresponds to and cooperates with the stator assembly 2. The bracket 1 includes a bracket body 11 and a base 12 disposed at the bottom end of the bracket body 11. The stator assembly 2 is fixedly connected to the base 12. The base 12 is fixedly connected with a shrapnel 5. The free end of the shrapnel 5 is connected to the swing frame 4, so that the swing frame 4 is movably suspended above the stator assembly 2. The mover assembly 3 includes a mover 31 and a mover mounting frame 32. The mover 31 is fixedly connected to the mover mounting frame 32. The mover mounting frame 32 is fixedly connected to the swing frame 4. A plurality of convex ribs 41 are provided on the lower end surface of the swing frame 4. The plurality of convex ribs 41 surround to form a receiving groove 42. The mover assembly 3 is installed in the receiving groove 42. The mover mounting frame 32 is provided with a plurality of notch grooves 321 corresponding to the convex ribs 41. The swing frame 4 and the mover mounting frame 32 are fixedly connected by screws. The mover 31 is a permanent magnet. There are 3 permanent magnets provided on the mover mounting frame 32, and the 3 permanent magnets are arranged on the mover mounting frame 32 along the second direction.

[0038] Based on the above embodiments, the present utility model provides a linear motor with an improved structure. A plurality of convex ribs 41 are provided on the lower end surface of the swing frame 4. The plurality of convex ribs 41 surround to form a receiving groove 42. The mover assembly 3 is installed in the receiving groove 42. During installation, the mover mounting frame 32 is embedded in the receiving groove 42, and the convex ribs 41 are inserted into the notch grooves 321. The convex ribs 41 of the swing frame 4 form a circumferential limit on the mover 31 and the mover mounting frame 32. Subsequently, the two are fixedly connected by screws, which can effectively prevent the mover mounting frame 32 from shifting relative to the swing frame 4. Then, the mover 31 is fixedly connected to the lower end surface of the mover mounting frame 32 by glue. At this time, the convex ribs 41 of the swing frame 4 separate the mover 31 and limit the mover 31 to prevent the mover 31 from shifting, as Figures 3 to 5 shown in the figure. This structural design makes the positioning and installation between the mover 31, the mover mounting frame 32 and the swing frame 4 more accurate and reliable, without shifting, thereby making the output of the linear motor more stable and effectively reducing the noise during operation. This can not only keep the reciprocating movement amplitude of the electric hair clipper head balanced, avoid sudden changes in strength, ensure that the cut hair length is uniform, but also prevent the hair pulling problem caused by sudden changes in strength and reduce the pain of the user. Among them, the first direction is the Y direction in Figure 1 , and the second direction is the X direction in Figure 1 .

[0039] As another preferred solution of the present utility model, the bracket body 11 includes a first frame body 111 and a second frame body 112, and lug ears 1111 are radially extended and arranged on both sides of the first frame body 111 and the second frame body 112. A convex column 11112 is arranged on the lug ear 1111 of the first frame body 111, and a groove 11113 corresponding to and cooperating with the convex column 11112 is arranged on the lug ear 1111 of the second frame body 112. The first frame body 111 and the second frame body 112 are positioned by the engagement of the convex column 11112 and the groove 11113. In this embodiment, as Figure 1 shown, during installation, the first frame body 111 and the second frame body 112 are quickly and accurately positioned through the engagement of the convex column 11112 and the groove 11113, making the cooperation between the first frame body 111 and the second frame body 112 more stable, thereby making the output of the linear motor more stable and significantly reducing the noise. This can not only reduce the additional vibration and noise during the operation of the cutter head, improve the haircut comfort of the user, but also reduce the wear of the cutter head and the motor, extend the service life of the electric hair clipper, and at the same time reduce the possibility of the cutter head getting stuck due to component loosening. In other preferred embodiments, as Figure 6 shown, a convex column 11112 is arranged on one side lug ear 1111 of the first frame body 111, and a groove 11113 is arranged on the other side lug ear 1111; a groove 11113 is arranged on one side lug ear 1111 of the second frame body 112 corresponding to the convex column 11112 of the first frame body 111, and a convex column 11112 is arranged on the one side lug ear 1111 corresponding to the groove 11113 of the first frame body 111. The first frame body 111 and the second frame body 112 are positioned by the engagement of the convex column 11112 and the groove 11113.

[0040] As another preferred solution of the present utility model, two swing frames 4 are arranged above the stator assembly 2, and the two swing frames 4 are arranged side by side along the first direction. The stator assembly 2 includes an iron core 21 and a coil (not shown in the figure). The iron core 21 includes a first magnetic shoe part 211 and a second magnetic shoe part 212 which are arranged at intervals. The coil is respectively wound around the outside of the first magnetic shoe part 211 and the second magnetic shoe part 212. A convex part 43 is arranged at the center of the swing frame 4, and first convex platforms 431 are arranged on both sides of the convex part 43. Extension parts 1112 are axially arranged at the upper ends of the first frame body 111 and the second frame body 112, and second convex platforms 11121 corresponding to the first convex platforms 431 are arranged on the extension parts 1112. A spring 6 is abutted between the first convex platform 431 and the second convex platform 11121. A swing rod 432 is arranged on one of the convex parts 43. In this embodiment, as Figure 2As shown, when a working current is passed through the coil, the first magnetic shoe portion 211 and the second magnetic shoe portion 212 will form virtual magnetic poles with alternating polarities. Under the action of the magnetic field force, the two swing frames 4 swing reciprocally in the opposite direction along the second direction, and finally drive the swing rod 432 to achieve reciprocating motion to complete power output. It should be noted that during the reciprocating swing of the swing frame 4, it will continuously receive the elastic acting forces of the return spring 6 and the elastic sheet 5. This design provides a stable return power for the swing frame 4, effectively ensuring the smoothness and continuity of the high-speed reciprocating motion. The core working principle of the linear motor provided by the present utility model is the same as that of the prior art. For details, reference can be made to a linear motor device disclosed in Chinese Utility Model Patent (Authorization Publication No.: CN219960373U), which will not be elaborated herein.

[0041] As another preferred solution of the present utility model, the base 12 is provided with an installation opening 121, and the iron core 21 is in interference fit with the installation opening 121. In this embodiment, as Figure 2 shown, the installation process is extremely convenient: simply press-fit the iron core 21 directly from the installation opening 121 of the base 12 to complete the firm connection between the two. This interference fit design has multiple advantages: First, it eliminates the need for additional fixing components such as screws and buckles in traditional installations, not only reducing the number of parts, lowering the material cost and the difficulty of inventory management, but also simplifying the overall structural design and making the assembly area of the base 12 and the iron core 21 more compact; Second, it improves the installation efficiency. The press-fit process does not require cumbersome operations such as screwing and alignment and can be quickly completed by automated equipment, effectively shortening the production cycle and being suitable for large-scale mass production; Third, the connection stability is stronger. The tight joint surface formed by the interference fit can effectively resist external forces such as vibration and impact, avoiding potential risks such as screw loosening, and ensuring that the iron core 21 always maintains a precise installation position during long-term use, thereby guaranteeing the operation accuracy and reliability of the entire device.

[0042] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A linear motor with an improved structure, comprising a bracket (1), a stator assembly (2), a mover assembly (3), and a swing frame (4) disposed inside the bracket (1), wherein the mover assembly (3) corresponds to and cooperates with the stator assembly (2), the bracket (1) comprises a bracket body (11) and a base (12) disposed at the bottom end of the bracket body (11), the stator assembly (2) is fixedly connected to the base (12), a spring piece (5) is fixedly connected to the base (12), and the free end of the spring piece (5) is connected to the swing frame (4) so ​​that the swing frame (4) is movably suspended above the stator assembly (2), characterized in that: The moving part assembly (3) includes a moving part (31) and a moving part mounting bracket (32). The moving part (31) is fixedly connected to the moving part mounting bracket (32), and the moving part mounting bracket (32) is fixedly connected to the swing frame (4). The lower end face of the swing frame (4) is provided with a plurality of protruding ribs (41), and the plurality of protruding ribs (41) surround to form a receiving groove (42). The moving part assembly (3) is installed in the receiving groove (42).

2. A linear motor with an improved structure according to claim 1, characterized in that: The moving part mounting bracket (32) is provided with a number of notches (321) corresponding to the protrusions (41).

3. A linear motor with an improved structure according to claim 1, characterized in that: The support body (11) includes a first frame (111) and a second frame (112), and lugs (1111) are provided on both sides of the first frame (111) and the second frame (112) in a radial direction.

4. A linear motor with an improved structure according to claim 3, characterized in that: The lug (1111) is provided with a through hole (11111).

5. A linear motor with an improved structure according to claim 4, characterized in that: The lug (1111) of the first frame (111) is provided with a protruding post (11112), and the lug (1111) of the second frame (112) is provided with a groove (11113) that corresponds to and cooperates with the protruding post (11112). The first frame (111) and the second frame (112) are positioned by the engagement of the protruding post (11112) and the groove (11113).

6. A linear motor with an improved structure according to claim 4, characterized in that: The first frame (111) has a protruding lug (1111) on one side with a protruding post (11112) and a protruding lug (1111) on the other side with a groove (11113); the second frame (112) has a protruding lug (1111) on one side corresponding to the protruding post (11112) of the first frame (111) with a groove (11113), and a protruding lug (1111) on one side corresponding to the groove (11113) of the first frame (111) with a protruding post (11112). The first frame (111) and the second frame (112) are positioned by the engagement of the protruding post (11112) and the groove (11113).

7. A linear motor with an improved structure according to claim 1, characterized in that: Two swing frames (4) are provided above the stator assembly (2), and the two swing frames (4) are arranged side by side along the first direction.

8. A linear motor with an improved structure according to claim 1, characterized in that: The stator assembly (2) includes an iron core (21) and a coil. The iron core (21) includes a first magnetic shoe portion (211) and a second magnetic shoe portion (212) arranged at intervals. The coil is wound around the outside of the first magnetic shoe portion (211) and the second magnetic shoe portion (212).

9. A linear motor with an improved structure according to claim 8, characterized in that: The base (12) is provided with an installation port (121), and the iron core (21) is interference-fitted with the installation port (121).

10. A linear motor with an improved structure according to claim 3, characterized in that: The swing frame (4) has a protrusion (43) at its center, and a first boss (431) is provided on both sides of the protrusion (43); the upper ends of the first frame (111) and the second frame (112) are axially provided with an extension (1112), and the extension (1112) is provided with a second boss (11121) corresponding to the first boss (431). A spring (6) is provided between the first boss (431) and the second boss (11121).

Images