Stator structure of limited angle deflection motor

Abstract

The utility model discloses a stator structure of a limited angle deflection motor, which comprises a rotor assembly and a coil winding, the rotor assembly is composed of a rotating shaft and a permanent magnet, the permanent magnet is fixedly covered on the circumferential outer side of the rotating shaft, and a wrapping body is arranged on the outer side of the coil winding. The wrapping body wraps the outer side of the coil winding in the length direction of the coil winding, a channel allowing the rotor assembly to penetrate through is formed in the wrapping body, and the first electrified coil and the second electrified coil are tightly attached to the inner wall of the channel through fixing glue. According to the invention, the design of tooth crowns is saved, so that not only can the mechanical noise formed by winding coils on the tooth crowns be reduced, the operation is quieter, but also the mutual abrasion is reduced, in addition, the situation that the tooth crowns directly drive the permanent magnets through the coils is eliminated, the response speed and the control precision of the rotating shaft can be improved, and the service life of the rotating shaft is prolonged. In this way, the change of the position signal can be responded more accurately, and higher angle control precision is achieved.

Description

Technical Field

[0001] This utility model relates to the field of stator structure, and more specifically to a stator structure for a finite angle deflection motor. Background Technology

[0002] A finite-angle deflection motor is a structural design that uses an electromagnetic field to drive a lens to deflect within a certain angle. It has a wide range of applications, including large-scale laser processing equipment and high-speed laser engraving machines.

[0003] CN213906405U discloses a unidirectional magnetic levitation acoustic brushless motor. By energizing the coil windings, a magnetic field is formed at the stator core. Magnets are located within this magnetic field, causing the magnets to drive the rotor core to rotate, which in turn drives the motor shaft to rotate. The coil windings switch the current direction and control the energizing time through an external circuit, thereby causing the rotor to produce a reciprocating motion of left and right rotation. The motion is transmitted by relying on electromagnetic effects. On the one hand, it avoids the problem of easy damage to elastic structures during use, which leads to a short service life of the motor. On the other hand, it allows the motor to transmit a larger torque per unit volume, with strong structural stability and low mechanical consumption.

[0004] However, in the above scheme, the coil is nested inside the magnetic yoke, which is a yoke iron made of stacked silicon steel sheets. It is evenly and symmetrically distributed around the induction coil. Its function is to constrain the leakage magnetic flux of the induction coil to spread outward. In the existing technology, the usual practice is to design tooth crowns on the magnetic yoke and then unwind the coil onto the tooth crowns to form a winding. However, setting tooth crowns will increase mechanical noise, making it impossible to run quietly, and will also increase wear between them. In addition, using the tooth crowns to directly drive the permanent magnet with the coil limits the control of the response speed and accuracy of the rotating shaft. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a stator structure for a limited-angle deflection motor, comprising a rotor assembly and coil windings. The rotor assembly consists of a rotating shaft and a permanent magnet, with the permanent magnet fixedly covering the outer circumferential side of the rotating shaft. The coil windings include a first energized coil and a second energized coil. An enclosure is provided on the outer side of the coil windings, forming a wrap around the outer side of the coil windings along their length. A channel for the rotor assembly to pass through is provided within the enclosure. The first and second energized coils are tightly attached to the inner wall of the channel using adhesive.

[0006] Furthermore, end caps are provided at both ends of the package body, and the end caps are fixed to the end faces of the package body by screws. A first chamber and a second chamber are formed between the end caps and the package body. The channel is the same as the first chamber and the second chamber. A first connector is provided at one end of the rotating shaft, and a second connector is provided at one end of the rotating shaft. The first connector is disposed in the first chamber, and the second connector is disposed in the second chamber.

[0007] Furthermore, both the first connector and the second connector are cylindrical in shape, and each of the first connector and the second connector has a first annular groove at one end. When the first connector and the second connector are connected to the rotating shaft, one end of the rotating shaft is used to insert into the first annular groove to form an interference fit.

[0008] Furthermore, the end of the first connector away from the first annular groove is provided with a groove.

[0009] Furthermore, a limiting rod is provided through the circumferential end face of the first connector, and a limiting groove is provided inside the end cover, with the limiting rod disposed within the limiting groove.

[0010] Furthermore, a first bearing is disposed in the first chamber and a second bearing is disposed in the second chamber. The first bearing is sleeved on the first connecting member and the second bearing is sleeved on the second connecting member.

[0011] Furthermore, the outer and inner rings of the first bearing are loosely fitted to the inner wall of the first chamber and the outer wall of the first connector, respectively, and the outer and inner rings of the second bearing are loosely fitted to the inner wall of the second chamber and the outer wall of the second connector, respectively.

[0012] Furthermore, a limiting ring is provided on the outside of the first connector, and the front end and rear end of the first bearing are respectively engaged between the limiting ring and the inner wall of the first chamber.

[0013] Furthermore, an elastic gasket is provided between the first bearing and the inner wall of the first chamber, and the elastic gasket is pre-pressed on one side of the first bearing.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This application eliminates the need for a toothed crown. Instead, a wrapping material forms around the outer side of the coil winding along its length. The coil is then firmly attached to the inner wall of the channel formed by the wrapping material using adhesive. This eliminates the need for a toothed crown, reducing mechanical noise caused by the coil winding around the toothed crown, resulting in quieter operation. It also reduces wear between the coils. Furthermore, eliminating the toothed crown and directly driving the permanent magnet with the coil improves the shaft's response speed and control precision. This allows for more accurate response to changes in position signals, achieving higher angle control precision. In applications requiring high-precision optical path control, such as laser medicine and semiconductor lithography, this better meets the requirements for precise control of the deflection angle of optical components, improving the processing accuracy and performance of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a hierarchical diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the end cap structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the first connecting member of this utility model;

[0020] Figure 4 This is a cross-sectional view of the package body of this utility model;

[0021] Figure 5 This is a cross-sectional view of the overall structure of this utility model.

[0022] The reference numerals and names in the figure are as follows:

[0023] Rotor assembly 100, coil winding 200, shaft 110, permanent magnet 120, first energized coil 210, second energized coil 220, enclosure 300, channel 310, end cap 320, first chamber 330, second chamber 340, first connector 130, second connector 140, first annular groove 131, groove 132, limiting rod 133, limiting groove 321, first bearing 331, second bearing 341, limiting ring 134, elastic gasket 332. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The present invention will now be described in more detail. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0026] In the description of this utility model, it should be noted that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom," indicating directions or positional relationships, are generally based on the directions or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. In the description of this utility model, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] The preferred embodiments of this utility model will now be further described with reference to the accompanying drawings. Figure 1 , Figure 4 and Figure 5As shown, a rotor structure for a galvanometer motor includes a rotor assembly 100 and a coil winding 200. The rotor assembly 100 consists of a rotating shaft 110 and a permanent magnet 120. The permanent magnet 120 is fixedly covered on the outer circumferential side of the rotating shaft 110. The coil winding 200 includes a first energized coil 210 and a second energized coil 220. A wrapping body 300 is provided on the outer side of the coil winding 200. The wrapping body 300 wraps the outer side of the coil winding 200 along the length direction of the coil winding 200. A channel 310 is provided inside the wrapping body 300 for the rotor assembly 100 to pass through. The first energized coil 210 and the second energized coil 220 are tightly attached to the inner wall of the channel 310 by adhesive.

[0030] In the above embodiment, the first energized coil 210 and the second energized coil 220 are tightly attached to the inner wall of the channel 310 with adhesive, thereby suspending the first energized coil 210 and the second energized coil 220 on the outside of the permanent magnet 120, so that the first energized coil 210 and the second energized coil 220 spatially surround the outside of the permanent magnet 120. Therefore, when the first energized coil 210 and the second energized coil 220 are energized, the permanent magnet 120 covering the rotating shaft 110 will generate opposite polarities, and under the magnetic field effect, the rotating shaft 110 will be driven to rotate inside the coil winding 200.

[0031] Compared to existing technologies, this application eliminates the need for a toothed crown. Instead, a wrapping body 300 wraps the outer side of the coil winding 200 along its length. The coil is then firmly attached to the inner wall of the channel 310 formed by the wrapping body 300 using adhesive. This eliminates the need for a toothed crown, reducing mechanical noise caused by the coil winding around the crown, resulting in quieter operation. It also reduces wear between components. Furthermore, eliminating the toothed crown and directly driving the permanent magnet 120 with the coil improves the response speed and control precision of the rotating shaft 110. This allows for more accurate response to changes in position signals, achieving higher angle control precision. In applications requiring high-precision optical path control, such as laser medicine and semiconductor lithography, this better meets the requirements for precise control of the deflection angle of optical components, improving the processing accuracy and performance of the equipment.

[0032] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 3As shown, end caps 320 are provided at both ends of the package 300. The end caps 320 are fixed to the end faces of the package 300 by screws. A first chamber 330 and a second chamber 340 are formed between the end caps 320 and the package 300. The channel 310 is the same as the first chamber 330 and the second chamber 340. A first connector 130 is provided at one end of the rotating shaft 110, and a second connector 140 is provided at one end of the rotating shaft 110. The first connector 130 is disposed in the first chamber 330, and the second connector 140 is disposed in the second chamber 340.

[0033] Furthermore, based on the above embodiments, combined with Figure 2 , Figure 3 and Figure 5 As shown, the first connector 130 and the second connector 140 are both cylindrical in shape. One end of the first connector 130 and the second connector 140 is provided with a first annular groove 131. When the first connector 130 and the second connector 140 are connected to the rotating shaft 110, one end of the rotating shaft 110 is used to insert into the first annular groove 131 to form an interference fit. In this way, when the rotating shaft 110 is driven to rotate inside the coil winding 200 under the magnetic field effect, it can drive the first connector 130 and the second connector 140 to rotate synchronously.

[0034] Furthermore, based on the above embodiments, combined with Figure 2 and 3 As shown, the first connector 130 has a groove 132 at one end away from the first annular groove 131. The groove 132 can hold different functional components according to different application scenarios. For example, in the galvanometer system of this application, the groove 132 can be used to hold optical lenses.

[0035] Furthermore, based on the above embodiments, combined with Figure 2 and 3 As shown, a limiting rod 133 is provided through the circumferential end face of the first connector 130, and a limiting groove 321 is provided in the end cover 320. The limiting rod 133 is disposed in the limiting groove 321. When the first connector 130 is driven to rotate synchronously under the magnetic field effect of the rotating shaft 110, the limiting rod 133 and the limiting groove 321 cooperate to limit the rotation angle of the first connector 130, thereby also limiting the rotation angle of the rotating shaft 110.

[0036] Furthermore, based on the above embodiments, combined with Figure 1 , Figure 4 and Figure 5As shown, a first bearing 331 is disposed in the first chamber 330, and a second bearing 341 is disposed in the second chamber 340. The first bearing 331 is sleeved on the first connecting member 130, and the second bearing 341 is sleeved on the second connecting member 140. Since the first connecting member 130 and the second connecting member 140 are respectively connected to the two ends of the rotating shaft 110, when the rotating shaft 110 rotates, the first bearing 331 and the second bearing 341 are used to support the rotation of the rotating shaft 110.

[0037] Furthermore, based on the above embodiments, such as Figure 5 As shown, the outer and inner rings of the first bearing 331 are loosely fitted with the inner wall of the first chamber 330 and the outer wall of the first connector 130, respectively. This limits the radial movement of the first bearing 331 between the first chamber 330 and the first connector 130. Similarly, the outer and inner rings of the second bearing 341 are loosely fitted with the inner wall of the second chamber 340 and the outer wall of the second connector 140, respectively. This limits the radial movement of the second bearing 341 between the second connector 140 and the second chamber 340. As a result, when the shaft 110 rotates, its radial movement depends on the radial runout accuracy of the first bearing 331 and the second bearing 341, eliminating the influence of other factors and making the radial movement of the shaft 110 more controllable.

[0038] Furthermore, based on the above embodiments, combined with Figure 3 and Figure 5 As shown, a limiting ring 134 protrudes outward from the first connecting member 130. The front end and rear end of the first bearing 331 are respectively engaged between the limiting ring 134 and the inner wall of the first chamber 330. In this way, the limiting ring 134 and the inner wall of the first chamber 330 cooperate to limit the front and rear movement of the first bearing 331, thereby preventing the first bearing 331 from moving back and forth when the rotating shaft 110 rotates.

[0039] Furthermore, based on the above embodiments, combined with Figure 1 and Figure 5 As shown, an elastic gasket 332 is provided between the first bearing 331 and the inner wall of the first chamber 330. The elastic gasket 332 is pre-pressed on one side of the first bearing 331. When the shaft 110 deflects in the radial direction, it will cause the first bearing 331 to compress the elastic gasket 332, thereby making the first bearing 331 operate more stably.

[0040] The details of the above exemplary embodiments are provided, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A stator structure of a limited angle deflection motor, characterized by, The application relates to a rotor assembly (100) and a coil winding (200), the rotor assembly (100) is composed of a rotating shaft (110) and a permanent magnet (120), the permanent magnet (120) is fixedly covered on the circumferential outer side of the rotating shaft (110), the coil winding (200) comprises a first current-carrying coil (210) and a second current-carrying coil (220), a wrapping body (300) is arranged outside the coil winding (200), the wrapping body (300) wraps the outer side of the coil winding (200) along the length direction of the coil winding (200), a channel (310) for the rotor assembly (100) to pass through is arranged in the wrapping body (300), and the first current-carrying coil (210) and the second current-carrying coil (220) are tightly fixed to the inner wall of the channel (310) through fixing glue.

2. The stator structure of a limited angle deflection motor according to claim 1, characterized by, End covers (320) are arranged at the two ends of the wrapping body (300), the end covers (320) are fixed on the end faces of the wrapping body (300) through screw rods, first chambers (330) and second chambers (340) are formed between the end covers (320) and the wrapping body (300), the channel (310) is the same as the first chambers (330) and the second chambers (340), a first connecting piece (130) is arranged at one end of the rotating shaft (110), and a second connecting piece (140) is arranged at one end of the rotating shaft (110), the first connecting piece (130) is arranged in the first chamber (330), and the second connecting piece (140) is arranged in the second chamber (340).

3. The stator structure of a limited angle deflection motor according to claim 2, characterized by, The first connecting piece (130) and the second connecting piece (140) are both in the shape of a cylinder, a first ring groove (131) is arranged at one end of the first connecting piece (130) and the second connecting piece (140), and one end of the rotating shaft (110) is used for being inserted into the first ring groove (131) to form an interference fit when the first connecting piece (130) and the second connecting piece (140) are connected with the rotating shaft (110).

4. The stator structure of a limited angle deflection motor according to claim 3, wherein A groove (132) is arranged at one end of the first connecting piece (130) away from the first ring groove (131).

5. The stator structure of a limited angle deflection motor according to claim 3, wherein A limiting rod (133) is arranged on the circumferential end face of the first connecting piece (130), and a limiting groove (321) is arranged in the end cover (320), the limiting rod (133) is arranged in the limiting groove (321).

6. The stator structure of a limited angle deflection motor according to claim 3, wherein A first bearing (331) is arranged in the first chamber (330), and a second bearing (341) is arranged in the second chamber (340), the first bearing (331) is sleeved on the first connecting piece (130), and the second bearing (341) is sleeved on the second connecting piece (140).

7. The stator structure of a limited angle deflection motor according to claim 6, wherein The outer ring and the inner ring of the first bearing (331) are loosely matched with the inner wall of the first chamber (330) and the outer wall of the first connecting piece (130) respectively, and the outer ring and the inner ring of the second bearing (341) are loosely matched with the inner wall of the second chamber (340) and the outer wall of the second connecting piece (140) respectively.

8. The stator structure of a limited angle deflection motor according to claim 7, wherein A limiting ring (134) is arranged outside the first connecting piece (130), and the front end and the rear end of the first bearing (331) are respectively clamped between the limiting ring (134) and the inner wall of the first cavity (330).

9. The stator structure of a limited angle deflection motor according to claim 8, wherein An elastic gasket (332) is arranged between the first bearing (331) and the inner wall of the first cavity (330), and the elastic gasket (332) is pre-pressed on one side of the first bearing (331).

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