Reciprocating motion structure and motor

Abstract

The utility model relates to the technical field of motors, in particular to a reciprocating motion structure and a motor, the reciprocating motion structure comprises a casing, a shaft body and an axial driving assembly, and part of the shaft body and the axial driving assembly are arranged in the casing; the axial driving assembly comprises a stator iron core, a stator winding and a magnet piece, the stator iron core is connected with the inner wall of the machine shell, the stator winding is arranged on connecting teeth of the stator iron core, and the magnet piece is arranged on the outer wall of the shaft body; the magnet part comprises at least two sub-magnets arranged side by side in the axial direction, the two sub-magnets face the stator core and the stator winding, the magnetic poles of the ends, facing the stator core and the stator winding, of the two sub-magnets are opposite, and the stator winding is connected with a direct-current power source and used for generating an electromagnetic field. The sub-magnets and the shaft body are driven by an electromagnetic field to reciprocate in the axial direction. The driving structure is simple in structure, the number of required structural parts is small, the product structure is optimized, the space occupied by the driving structure is reduced, the working efficiency is higher, and more reciprocating motion scenes are met.

Description

Technical Field

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

[0002] A reciprocating motor has an output shaft that can rapidly reciprocate along its axis. For example, a fascia massager has a reciprocating mechanism inside, with the output end connected to a massage head, which reciprocates to achieve the purpose of massaging a part of the body.

[0003] Existing reciprocating mechanisms typically require multiple transmission components to achieve reciprocating motion. For example, in the fascia massager's drive structure, a motor drives the bearings to rotate, and then an eccentric wheel and connecting rod combine to convert the rotational motion into back-and-forth reciprocating motion, ultimately driving the massage head to produce reciprocating motion (vibration effect).

[0004] In the above reciprocating structure, more transmission parts are required, which not only increases the complexity of the structure and the volume occupied, but also has poor stability and service life. Utility Model Content

[0005] In order to solve at least the above technical problems existing in the prior art, the utility model provides a reciprocating structure and a motor.

[0006] On the one hand, the utility model provides a reciprocating movement structure, including a casing, a shaft and an axial drive assembly, wherein part of the shaft and the axial drive assembly are arranged in the casing; the axial drive assembly includes a stator core, a stator winding and a magnet component, the stator core is connected to the inner wall of the casing, the stator winding is arranged on the connecting teeth of the stator core, and the magnet component is arranged on the outer wall of the shaft; the magnet component includes at least two sub-magnets arranged side by side along the axial direction, the two sub-magnets are arranged toward the stator core and the stator winding, and the magnetic poles of the two sub-magnets facing one end of the stator core and the stator winding are opposite, and the stator winding is connected to a DC power supply for generating an electromagnetic field, which drives the sub-magnets and the shaft to reciprocate along the axial direction.

[0007] In some embodiments, two axial drive assemblies are included, and the two axial drive assemblies constitute a group of axial drive devices; the stator cores, stator windings and magnet parts in the two axial drive assemblies are symmetrically arranged with the axis of the shaft as the center.

[0008] In some embodiments, the stator core includes a transverse portion and a tooth portion, three parallel and spaced teeth portions are vertically provided on one side of the transverse portion, and one end of the tooth portion away from the transverse portion is arranged toward the sub-magnet; the stator winding is connected to the tooth portion located in the middle.

[0009] In some embodiments, the magnet component also includes a supporting seat, which is fixedly connected to the shaft body, and the supporting seat includes a supporting surface, and the sub-magnet is arranged on the supporting surface; the sub-magnet is strip-shaped and has a set width, and four sub-magnets are arranged side by side on the supporting surface along the axial direction of the shaft body, and the width direction of the sub-magnet is parallel to the axial direction of the shaft body, and the adjacent sub-magnets have different magnetic poles facing the stator core and the stator winding.

[0010] In some embodiments, two sets of axial drive devices are arranged in the housing along the axial direction of the shaft.

[0011] In some embodiments, a stator limiting structure is provided on the casing, and the stator limiting structure is used to limit the position of the stator core and the stator winding in the casing, and to limit the circumferential position of the shaft.

[0012] In some embodiments, a cavity is provided in the housing for passing through the shaft body, and the cross-section of the cavity and the bearing seat along the radial direction of the shaft body is rectangular, and the bearing seat and the shaft body are limited by the cavity in the circumferential rotation; the stator limiting structure includes a limiting groove recessed on the inner wall of the cavity, and the stator core is clamped in the limiting groove.

[0013] In some embodiments, a detection structure is further included, and the detection structure is arranged in the housing; the detection structure is used to detect the axial movement distance of the shaft body.

[0014] On the other hand, the present invention further provides a motor comprising the above-mentioned reciprocating structure.

[0015] On another aspect, the present invention further provides a motor, comprising the above-mentioned reciprocating structure; one end of the shaft is located outside the housing and is connected to an operating head.

[0016] The utility model provides a reciprocating movement structure and motor, which complete the reciprocating movement in the axial direction of the shaft body through the cooperation of the stator core, the stator winding and the magnetic part. Specifically: in the starting position, the connecting teeth connected to the stator winding are oriented toward the interval position between the two sub-magnets, that is, located in the middle position of the two sub-magnets. A positive current is applied to the stator winding. According to the principle that like poles repel and opposite poles attract, the stator winding and the connecting teeth move toward one of the sub-magnets and are arranged opposite to the sub-magnet. Subsequently, the power is cut off, the magnetic poles of the stator winding and the connecting teeth disappear, and the two sub-magnets are reset to the initial positions. Subsequently, a reverse current is applied to the stator winding, the stator winding and the connecting teeth move toward the other sub-magnet and are arranged opposite to the sub-magnet. Then, the power is cut off again, and the two sub-magnets are reset to the initial positions again. In this way, the reciprocating movement of the shaft body is achieved.

[0017] The technical solution of the utility model utilizes the coordination of the stator core, stator winding and magnetic parts in the casing to realize high-speed reciprocating drive of the shaft. In this driving mode, the structure is simple, the number of required structural parts is small, the product structure is optimized, and the space occupied by the driving structure is reduced. In addition, the reciprocating structure can be provided with multiple groups of axial driving devices, and the multiple groups of axial driving devices are independently controlled. The reciprocating speed of the linear motion, that is, the vibration intensity, can be controlled in different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0019] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0020] Figure 1 A schematic structural diagram of a reciprocating structure provided by an embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of the interior of a reciprocating structure housing provided by an embodiment of the present invention;

[0022] Figure 3 A schematic structural diagram of a reciprocating structure housing provided by an embodiment of the present utility model;

[0023] Figure 4 A schematic structural diagram of a reciprocating structural shaft and an axial drive assembly provided in an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Schematic diagram of the structure of the central axial drive assembly.

[0025] In the picture:

[0026] 10: housing; 20: shaft; 30: axial drive assembly;

[0027] 11: chamber; 12: limiting groove;

[0028] 21: latch;

[0029] 31: stator core; 311: transverse portion; 312: tooth portion; 32: stator winding; 33: magnet component; 331: sub-magnet; 332: bearing seat; 3321: bearing surface. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0031] An embodiment of the present utility model provides a reciprocating structure, including a housing, a shaft body and an axial drive assembly, wherein part of the shaft body and the axial drive assembly are arranged in the housing; the axial drive assembly is used to drive the shaft body to move back and forth along the axial direction, wherein the axial drive assembly adopts a drive structure with simpler structure and higher efficiency.

[0032] The following describes in detail the various structures in the reciprocating structure provided by the embodiment of the present invention, as well as the positional relationship and connection relationship between the various structures, in conjunction with the accompanying drawings.

[0033] like Figures 1 to 5 As shown, the axial drive assembly 30 includes a stator core 31, a stator winding 32 and a magnetic part 33. When the stator winding 32 is energized, a magnetic field is generated, and the shaft 20 is driven by the principle that like poles repel and unlike poles attract. In terms of structure, the stator core 31 is connected to the inner wall of the casing 10, the stator winding 32 is arranged on the connecting teeth of the stator core 31, and the magnetic part 33 is arranged on the outer wall of the shaft 20; the magnetic part 33 includes at least two sub-magnets 331 arranged side by side along the axial direction, and the two sub-magnets 331 are arranged toward the stator core 31 and the stator winding 32, and the magnetic poles of the two sub-magnets 331 facing one end of the stator core 31 and the stator winding 32 are opposite.

[0034] When the stator winding 32 is powered off, the connecting teeth of the stator core 31 face one end of the sub-magnet 331 (hereinafter referred to as the end of the connecting teeth) and are located in the center of the two sub-magnets 331, which is the original position of the sub-magnet 331. The sub-magnet 331 is connected to the shaft 20, that is, this position is the original position of the shaft 20.

[0035] The stator winding 32 is connected to a DC power supply to generate an electromagnetic field. The electromagnetic field makes the connecting teeth of the stator core 31 equivalent to the magnetic poles of the magnet, thereby driving the sub-magnet 331 and the shaft 20 to reciprocate along the axial direction. For example, when a forward current is passed through the stator winding 32, the end of the connecting tooth is of one polarity, such as the N pole. Due to the repulsion of like poles and attraction of opposite poles between magnetic poles, the S pole sub-magnet 331 approaches the end of the connecting tooth, thereby causing the shaft 20 to move a certain distance in one direction. Then, the power is cut off, the polarity of the end of the connecting tooth disappears, and under the synchronous action of the two sub-magnets 331, the shaft 20 is reset to its original position; then, a reverse current is passed through the stator winding 32, and the end of the connecting tooth is of another polarity, such as the S pole. Due to the repulsion of like poles and attraction of opposite poles between magnetic poles, the N pole sub-magnet 331 approaches the end of the connecting tooth, thereby causing the shaft 20 to move a certain distance in another direction. Then, the power is cut off, the polarity of the end of the connecting tooth disappears, and under the synchronous action of the two sub-magnets 331, the shaft 20 is reset to its original position, thereby completing a reciprocating movement process.

[0036] When high-frequency reciprocating movement is required, rapid reciprocating movement can be achieved by controlling the DC power direction and on-off time of the power supply.

[0037] For example, continue to refer to Figures 1 to 5 As shown, the stator core 31 includes a transverse portion 311 and a tooth portion 312. Three parallel and spaced teeth 312 are vertically provided on one side of the transverse portion 311. The end of the tooth portion 312 away from the transverse portion 311 is arranged toward the sub-magnet 331; the stator winding 32 is connected to the tooth portion 312 located in the middle.

[0038] For example, the magnet part 33 also includes a bearing seat 332, which is fixedly connected to the shaft body 20. The bearing seat 332 includes a bearing surface 3321, and the sub-magnet 331 is arranged on the bearing surface 3321; the sub-magnet 331 is strip-shaped and has a set width. Four sub-magnets 331 are arranged side by side on the bearing surface 3321 along the axial direction of the shaft body 20. The width direction of the sub-magnet 331 is parallel to the axial direction of the shaft body 20, and the magnetic poles of adjacent sub-magnets 331 facing the stator core 31 and the stator winding 32 are different.

[0039] The stator winding 32 is mounted on the center tooth 312. When a forward or reverse current flows through the stator winding 32, the polarity formed by the center tooth 312 is opposite to that formed by the teeth 312 on either side. Four sub-magnets 331 are mounted on the shaft 20, with adjacent sub-magnets 331 having different polarities. By changing the direction of the current flowing through the stator winding 32, the stator core 31 drives the sub-magnets 331 to move in two directions along the axis. Combined with the power supply's on / off control, the shaft 20 is ultimately driven back and forth.

[0040] In the embodiment of the present invention, the teeth 312 of the stator winding 32 are not provided to cooperate with the sub-magnet 331, and an auxiliary driving force can also be generated (also based on the principle that like poles repel and unlike poles attract). Although the driving force is slightly smaller, it can also act as an auxiliary driving force on the shaft 20; there is no restriction on the number of teeth 312 of the stator core 31 and the number of sub-magnets 331, and they can also be in other quantitative forms as long as the driving mode of the technical solution of the present invention is met.

[0041] Continue to refer Figures 1 to 5 As shown, in the embodiment of the present invention, the reciprocating structure includes two axial drive assemblies 30, and the two axial drive assemblies 30 constitute a group of axial drive devices; the stator core 31, stator winding 32 and magnet part 33 in the two axial drive assemblies 30 are symmetrically arranged with the axis of the shaft body 20 as the center.

[0042] The two axial drive assemblies 30 are independently configured but operate synchronously. Utilizing the two axial drive assemblies 30 provides more sufficient driving force to meet the different driving requirements of the shaft body 20. Synchronous operation can be understood as the direction of the current flowing into the stator winding 32, the start and stop times, etc. are all the same, to ensure that the two axial drive assemblies 30 complete the driving of the shaft body 20 synchronously.

[0043] Alternatively, for example, two sets of axial drive devices are provided in the housing 10 along the axial direction of the shaft 20. Based on the two axial drive assemblies 30, more sets of axial drive devices are further provided to provide more sufficient and more precise driving force for the shaft 20. Each set of axial drive devices operates synchronously.

[0044] For example, a greater number of axial drive devices may be provided on the shaft body 20 , and multiple groups of axial drive devices may be evenly distributed to provide a more stable driving force.

[0045] In the embodiment of the present invention, the housing 10 is provided with a stator limiting structure, which is used to limit the position of the stator core 31 and the stator winding 32 within the housing 10. During the operation of the reciprocating structure, the shaft 20 moves while the stator core 31 needs to be fixed in position. Therefore, in order to prevent the stator core 31 and the stator winding 32 from changing position, a limiting structure can be further provided to limit the position of the stator core 31 and the stator winding 32, as well as to limit the circumferential position of the shaft 20.

[0046] For example, a chamber 11 for passing through the shaft body 20 is provided in the housing 10. The cross-sectional shape of the chamber 11 and the supporting seat 332 along the radial direction of the shaft body 20 is rectangular, and the circumferential rotation of the supporting seat 332 and the shaft body 20 is limited by the chamber 11; the gap between the inner wall of the chamber 11 and the supporting seat 332 cannot meet the circumferential rotation of the supporting seat 332, thereby achieving the purpose of limiting.

[0047] The stator limiting structure includes a limiting groove 12 located in the inner wall of the chamber 11. The stator core 31 is clamped in the limiting groove 12. The stator core 31 is limited in its position by the limiting groove 12, which is equivalent to the stator core 31 being clamped in the limiting groove 12 and fixedly connected to the casing 10, so that it will not move relative to the casing 10.

[0048] For example, in the embodiment of the present invention, a latch 21 structure is provided at both ends of the shaft body 20. The two latches 21 can limit the axial movement distance of the shaft body 20, thereby preventing the shaft body 20 from moving too far and causing a "flying car" phenomenon.

[0049] For example, in the embodiment of the present invention, the reciprocating movement structure further includes a detection structure, which is disposed in the housing 10 ; the detection structure is used to detect the axial movement distance of the shaft body 20 .

[0050] For example, the detection structure includes a distance detection sensor, etc., through which the moving distance of the shaft body 20 can be determined, and the operating status of the shaft body 20 can be determined according to the moving distance.

[0051] The present invention provides a motor including the reciprocating structure. The shaft 20 of the reciprocating structure can be applied to different usage scenarios. For example, during production, testing, and other operations, the reciprocating structure can achieve reciprocating, high-frequency movement.

[0052] An embodiment of the present invention provides a motor including the above-mentioned reciprocating structure; one end of the shaft 20 is located outside the housing 10 and is connected to an operating head, and the operating head is driven to reciprocate through the shaft 20.

[0053] For example, the motor is used in a fascia instrument, and the operating head is various massage heads used in the fascia instrument. The operating head is driven to move back and forth at different frequencies through the shaft 20 to achieve the required massage frequency.

[0054] The utility model provides a reciprocating motion structure and motor, which completes the reciprocating motion of the shaft body 20 in the axial direction through the cooperation of the stator core 31, the stator winding 32 and the magnet part 33. Specifically: in the starting position, the connecting tooth connected to the stator winding 32 faces the interval position between the two sub-magnets 331, that is, it is located in the middle position of the two sub-magnets 331. The stator winding 32 is fed with a positive current. According to the principle that like poles repel and opposite poles attract, the stator winding 32 and the connecting tooth move toward one of them. The sub-magnet 331 moves in the direction of the sub-magnet 331 and is set opposite to the sub-magnet 331. Then, the power is turned off, the magnetic poles of the stator winding 32 and the connecting teeth disappear, and the two sub-magnets 331 are reset to their initial positions. Then, a reverse current is passed through the stator winding 32, and the stator winding 32 and the connecting teeth move toward the other sub-magnet 331 and are set opposite to the sub-magnet 331. Then, the power is turned off again, and the two sub-magnets 331 are reset to their initial positions again. In this way, the reciprocating movement of the shaft 20 is realized.

[0055] The technical solution of the present invention, in the casing 10, utilizes the cooperation of the stator core 31, the stator winding 32 and the magnetic part 33 to realize high-speed reciprocating drive of the shaft 20. In this driving mode, the structure is simple, the number of required structural parts is small, the product structure is optimized, and the space occupied by the driving structure is reduced. In addition, the reciprocating moving structure can be provided with multiple groups of axial driving devices, and the multiple groups of axial driving devices are independently controlled. The reciprocating speed of the linear motion, that is, the vibration intensity, can be controlled in different application scenarios.

[0056] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0058] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A reciprocating structure, characterized in that: It comprises a housing (10), a shaft (20) and an axial drive assembly (30), wherein parts of the shaft (20) and the axial drive assembly (30) are arranged in the housing (10); The axial drive assembly (30) comprises a stator core (31), a stator winding (32) and a magnet (33); the stator core (31) is connected to the inner wall of the housing (10); the stator winding (32) is arranged on the connecting teeth of the stator core (31); and the magnet (33) is arranged on the outer wall of the shaft (20); The magnet component (33) comprises at least two sub-magnets (331) arranged side by side in the axial direction, the two sub-magnets (331) are arranged toward the stator core (31) and the stator winding (32), and the magnetic poles of the two sub-magnets (331) facing one end of the stator core (31) and the stator winding (32) are opposite, and the stator winding (32) is connected to a DC power supply for generating an electromagnetic field, and the electromagnetic field drives the sub-magnets (331) and the shaft (20) to reciprocate in the axial direction.

2. The reciprocating structure according to claim 1, characterized in that: It comprises two axial drive assemblies (30), and the two axial drive assemblies (30) constitute a set of axial drive devices; The stator cores (31), stator windings (32) and magnet components (33) in the two axial drive assemblies (30) are symmetrically arranged with the axis of the shaft body (20) as the center.

3. The reciprocating structure according to claim 2, characterized in that: The stator core (31) comprises a transverse portion (311) and a tooth portion (312); three parallel and spaced tooth portions (312) are vertically provided on one side of the transverse portion (311); and one end of the tooth portion (312) away from the transverse portion (311) is arranged toward the sub-magnet (331); The stator winding (32) is connected to the tooth portion (312) located in the middle.

4. The reciprocating structure according to claim 3, characterized in that: The magnet member (33) further comprises a bearing seat (332), wherein the bearing seat (332) is fixedly connected to the shaft body (20), and the bearing seat (332) comprises a bearing surface (3321), and the sub-magnet (331) is arranged on the bearing surface (3321); The sub-magnets (331) are strip-shaped and have a set width. Four sub-magnets (331) are arranged side by side on the bearing surface (3321) along the axial direction of the shaft (20). The width direction of the sub-magnets (331) is parallel to the axial direction of the shaft (20), and the magnetic poles of adjacent sub-magnets (331) facing the stator core (31) and the stator winding (32) are different.

5. The reciprocating structure according to claim 4, characterized in that: Two sets of axial drive devices are arranged in the housing (10) along the axial direction of the shaft (20).

6. The reciprocating structure according to claim 4, characterized in that: The housing (10) is provided with a stator limiting structure, which is used to limit the positions of the stator core (31) and the stator winding (32) within the housing (10), and to limit the circumferential position of the shaft (20).

7. The reciprocating structure according to claim 6, characterized in that: A chamber (11) for passing through the shaft (20) is provided in the housing (10); the chamber (11) and the bearing seat (332) have a rectangular cross-section along the radial direction of the shaft (20); and the bearing seat (332) and the shaft (20) are limited in circumferential rotation by the chamber (11); The stator limiting structure comprises a limiting groove (12) recessed on the inner wall of the chamber (11), and the stator core (31) is engaged with the limiting groove (12).

8. The reciprocating structure according to any one of claims 1 to 6, characterized in that: It also includes a detection structure, which is arranged in the housing (10); The detection structure is used to detect the axial movement distance of the shaft body (20).

9. A motor, characterized in that: The method comprises the reciprocating movement structure according to any one of claims 1 to 8.

10. A motor, characterized in that: comprising a reciprocating structure according to any one of claims 1 to 8; One end of the shaft (20) is located outside the housing (10) and is connected to an operating head.

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