Rotor structure of limited angle deflection motor

Abstract

The utility model discloses a rotor 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 the coil winding comprises a first electrified coil and a second electrified coil. The first electrified coil and the second electrified coil are respectively suspended on the outer side of the permanent magnet and are oppositely arranged, a first connecting piece is arranged at one end of the rotating shaft, and a second connecting piece is arranged at one end of the rotating shaft. The magnetic field change of the number of the magnetic poles is relatively gentle, the rotating speed is relatively stable, relatively uniform speed output can be kept in the working process, so that it can be ensured that the laser beam accurately irradiates the target position, the machining precision is improved, meanwhile, the rotating speed is relatively low and stable, and in the closed-loop feedback control process, the machining precision is improved. And the change of a position signal can be responded more accurately, so that higher angle control precision is realized.

Description

Technical Field

[0001] This utility model relates to the field of rotor structure, and more specifically to a rotor structure for a limited-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] In the existing field, a rotating shaft made of magnets is usually used, and a coil winding is set on the outside of the rotating shaft. The magnetic field is generated when the coil winding is energized to drive the rotating shaft to rotate. However, from the above magnetic field circuit, the magnetic field of the existing structure changes drastically and the rotation speed is relatively high. However, such high rotation speed may bring certain challenges in some application scenarios with high requirements for speed stability, such as the easy occurrence of rotation speed fluctuations. In addition, in the closed-loop feedback control process in the field of galvanometers, the two-pole structure cannot accurately respond to changes in position signals and cannot achieve higher angle control accuracy. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a rotor 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. The permanent magnet is fixedly covered on the outer circumferential side of the rotating shaft. The coil windings include a first energized coil and a second energized coil. The first energized coil and the second energized coil are respectively suspended on the outer side of the permanent magnet and positioned opposite each other. A first connector and a second connector are provided at one end of the rotating shaft.

[0005] Furthermore, the coil winding also includes a sheet-like substrate, which is suspended around the outside of the permanent magnet. The substrate is made of a non-rigid double-layer insulating material, and the first and second energized coils are made of copper foil and are imprinted on the side of the substrate facing the permanent magnet. The first and second energized coils are interconnected and have a first terminal and a second terminal leading out to the outside of the substrate, respectively. The first terminal is used to connect to a power source, so that the current passes through the first and second energized coils and then leaves from the second terminal.

[0006] Furthermore, the wire spacing within the first and second energized coils is between 0.2 and 0.3 mm.

[0007] Furthermore, the first connector is cylindrical in shape, and one end of the first connector is provided with a first annular groove. When the first connector is 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 limit rod is provided on the circumferential end face of the first connector.

[0010] Furthermore, the second connector is cylindrical in shape, and one end of the second connector is provided with a second annular groove. When the second connector is connected to the rotating shaft, one end of the rotating shaft is used to insert into the second annular groove to form an interference fit.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The magnetic field changes relatively smoothly, resulting in a more stable rotational speed. This allows for a more uniform speed output during operation, which is crucial for galvanometer systems that require precise control of the optical path deflection angle and position. For example, in laser precision machining, a stable rotational speed ensures the laser beam accurately illuminates the target location, improving machining accuracy.

[0013] 2. Furthermore, the rotational speed of this application is relatively low and stable, enabling more precise response to changes in the position signal during closed-loop feedback control, thereby achieving higher angle control accuracy. In applications requiring high-precision optical path control, such as laser medicine and semiconductor lithography, it can better meet the precise control requirements for the deflection angle of optical components, improving the processing accuracy and performance of the equipment.

[0014] 3. The use of a flat substrate makes the coil windings flatter, allowing them to be installed on smaller motors. The flat surface also greatly increases the heat dissipation area, reducing heat loss and improving heat dissipation efficiency during high-speed operation. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is an exploded view of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the coil winding structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the first connecting member of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the second connecting member of this utility model.

[0020] The reference numerals and names in the figure are as follows:

[0021] Rotor assembly 100, coil winding 200, rotating shaft 110, permanent magnet 120, first energized coil 210, second energized coil 220, first connector 130, second connector 140, base plate 230, first terminal 211, second terminal 221, first annular groove 131, groove 132, limiting rod 133, second annular groove 141. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The preferred embodiments of this utility model will now be further described with reference to the accompanying drawings. Figure 1 and Figure 2 As shown, the rotor structure of the finite angle deflection 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. The first energized coil 210 and the second energized coil 220 are respectively suspended on the outer side of the permanent magnet 120 and are positioned opposite each other. 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.

[0028] In the above embodiment, in the rotor assembly 100, since the permanent magnet 120 completely covers and is fixed on the outer side of the rotating shaft 110 in the circumferential direction, and the first energized coil 210 and the second energized coil 220 are respectively spatially opposite to each other around the outer side of the permanent magnet 120, 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 at adjacent ends, and under the magnetic field effect, the rotating shaft 110 will be driven to rotate inside the coil winding 200, thereby driving the first connector 130 and the second connector 140 to rotate synchronously.

[0029] This application employs a method where permanent magnets 120 are arranged around a rotating shaft 110. By energizing a coil winding 200 suspended outside the permanent magnets 120, the polarities of adjacent ends of the permanent magnets 120 are reversed, thus forming a magnetic field loop. Compared to existing technologies, the magnetic field changes more smoothly, and the rotational speed is more stable, maintaining a relatively uniform speed output during operation. This is crucial for galvanometer systems that require precise control of the optical path deflection angle and position. For example, in the field of laser precision machining, a stable rotational speed ensures that the laser beam accurately illuminates the target position, improving machining accuracy. Furthermore, the relatively low and stable rotational speed of this application allows for more precise response to changes in position signals during closed-loop feedback control, thereby achieving higher angle control accuracy.

[0030] Furthermore, based on the above embodiments, such as Figure 2 As shown, the coil winding 200 also includes a sheet-like substrate 230, which is suspended around the outside of the permanent magnet 120. The substrate 230 is made of a non-rigid double-layer insulating material. The first energized coil 210 and the second energized coil 220 are made of copper foil and are imprinted on the side of the substrate 230 facing the permanent magnet 120. The first energized coil 210 and the second energized coil 220 are interconnected and have a first terminal 211 and a second terminal 221 respectively leading out of the substrate 230. The first terminal 211 is used to connect to the power supply, so that the current passes through the first energized coil 210 and the second energized coil 220 and leaves from the second terminal 221. In this way, the coil winding 200 is flatter in size and can be installed on a smaller motor. The flat surface can greatly increase the heat dissipation area, reduce heat loss under high-speed motor operation, and improve its heat dissipation efficiency.

[0031] Furthermore, based on the above embodiments, the line spacing within the first energized coil 210 and the second energized coil 220 is between 0.2 and 0.3 mm. Such a line spacing ensures that the first energized coil 210 and the second energized coil 220 can wrap a maximum number of turns around the end face of the substrate 230 without increasing the process difficulty.

[0032] Furthermore, based on the above embodiments, such as Figure 3 As shown, the first connector 130 is cylindrical in shape, and one end of the first connector 130 is provided with a first annular groove 131. When the first connector 130 is 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 to rotate synchronously.

[0033] Furthermore, based on the above embodiments, such as Figure 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.

[0034] Furthermore, based on the above embodiments, such as Figure 3As shown, a limiting rod 133 is provided on the circumferential end face of the first connector 130. When the first connector 130 is driven to rotate synchronously under the magnetic field effect of the rotating shaft 110, the limiting rod 133 is used to cooperate with an external limiting mechanism (not shown in the figure) to limit the rotation angle of the first connector 130, thereby also limiting the rotation angle of the rotating shaft 110.

[0035] Furthermore, based on the above embodiments, such as Figure 4 As shown, the second connector 140 is cylindrical in shape, and a second annular groove 141 is provided at one end of the second connector 140. When the second connector 140 is connected to the rotating shaft 110, one end of the rotating shaft 110 is used to insert into the second annular groove 141 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, the second connector 140 can be driven to rotate synchronously.

[0036] 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 rotor structure for a limited angle deflection motor, characterized by The rotor assembly (100) is composed of a rotating shaft (110) and a permanent magnet (120) fixedly covering the outer side of the rotating shaft (110) in the circumferential direction, and the coil winding (200) includes a first energized coil (210) and a second energized coil (220) respectively suspended on the outer side of the permanent magnet (120) and oppositely arranged, 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).

2. The rotor structure of a limited angle deflection motor according to claim 1, characterized by The coil winding (200) further includes a sheet-shaped substrate (230) suspended on the outer side of the permanent magnet (120), the substrate (230) is made of a non-rigid double-layer insulating material, the first energized coil (210) and the second energized coil (220) are made of copper foil material and are imprinted on the side of the substrate (230) facing the permanent magnet (120), the first energized coil (210) and the second energized coil (220) are in communication with each other and have a first connecting terminal (211) and a second connecting terminal (221) respectively led out to the outside of the substrate (230), the first connecting terminal (211) is used for connecting a power supply so that the current passes through the first energized coil (210) and the second energized coil (220) and then leaves from the second connecting terminal (221).

3. The rotor structure of a limited angle deflection motor according to claim 2, characterized by The wire distance in the first energized coil (210) and the second energized coil (220) is between 0.2 and 0.3 mm.

4. The rotor structure of a limited angle deflection motor according to claim 1, characterized by, The first connecting piece (130) is in the shape of a cylinder, one end of the first connecting piece (130) is provided with a first ring groove (131), when the first connecting piece (130) is connected with the rotating shaft (110), one end of the rotating shaft (110) is used for inserting the first ring groove (131) to form an interference fit.

5. The rotor structure of a limited angle deflection motor according to claim 4, characterized by The end of the first connecting piece (130) away from the first ring groove (131) is provided with a groove (132).

6. The rotor structure of a limited angle deflection motor according to claim 5, characterized by A limiting rod (133) is arranged on the circumferential end surface of the first connecting piece (130).

7. The rotor structure of a limited angle deflection motor according to claim 1, wherein The second connecting piece (140) is in the shape of a cylinder, one end of the second connecting piece (140) is provided with a second ring groove (141), when the second connecting piece (140) is connected with the rotating shaft (110), one end of the rotating shaft (110) is used for inserting the second ring groove (141) to form an interference fit.

Images