Moving coil limited rotation device
By setting permanent magnet groups on both sides of the substrate of the moving coil limited rotation device, the coil winding and the permanent magnets interact in opposite directions, which solves the problem of insufficient driving torque caused by a single permanent magnet and achieves a stronger shaft rotation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ELIMAG INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-30
AI Technical Summary
In existing moving coil limited rotation devices, because permanent magnets are only set on one side of the winding, the interaction between the coil magnetic field and the permanent magnet magnetic field is small, resulting in insufficient driving torque and inability to effectively drive heavy loads.
Permanent magnet groups are arranged on both sides of the substrate of the moving coil limited rotation device, so that when the first and second coil windings are energized, they interact with the magnetic fields of the permanent magnets on both sides in opposite directions, thereby driving the substrate to deflect in the opposite direction around the axis of rotation, thereby increasing the rotational torque of the axis of rotation.
By setting permanent magnet groups on both sides of the substrate, the magnetic field strength is enhanced, the ability of the rotating shaft to repeatedly deflect within a certain angle is improved, and the driving capability is enhanced.
Smart Images
Figure CN224438630U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motors, and more specifically to a device for limiting the rotation angle of a moving coil. Background Technology
[0002] A moving coil limited rotation angle device typically refers to a device that places a permanent magnet on one side of a sheet-like winding, and then generates a magnetic field by energizing the winding. The interaction between the magnetic field of the winding and the magnetic field of the permanent magnet is used to drive the sheet-like winding to rotate.
[0003] US Patent No. 10133059B2 discloses a moving coil limited rotation angle device, which is similar in principle to the one mentioned above. However, in the above patent, when the winding is rotating, since the permanent magnet is only set on one side of the winding, the interaction between the magnetic field of the coil and the magnetic field of the permanent magnet is small after the winding is energized. The torque of the driving substrate deflecting around the axis of rotation is small, so it cannot drive a heavy load. Utility Model Content
[0004] To address the aforementioned issues, this application provides a moving coil limited rotation angle device, comprising a housing, a rotor assembly and a stator assembly disposed within the housing, the rotor assembly comprising a base plate and a rotating shaft passing vertically through the end face of the base plate, a first coil winding and a second coil winding being evenly distributed on both end faces of the base plate, the first coil winding and the second coil winding being symmetrically distributed about the rotating shaft, the stator assembly comprising a first fixing plate and a second fixing plate disposed parallel to each other on both sides of the base plate, the first fixing plate and the second fixing plate being respectively disposed on the side facing the base plate, permanent magnet groups, when the first coil winding and the second coil winding are energized, the first coil winding and the second coil winding driving the rotating shaft to deflect under the action of the magnetic field.
[0005] Furthermore, the housing consists of an annular mounting base and an end cap, with a receiving cavity formed between the mounting base and the end cap. The rotor assembly and the stator assembly are disposed within the receiving cavity. The first fixing plate and the second fixing plate are respectively fixed within the mounting base and the end cap. A control plate is disposed on the side of the mounting base away from the end cap. The base plate and the control plate are electrically connected by wires. When power is required, the control plate sends an electrical signal to the base plate through the wires, causing the first coil winding and the second coil winding to be energized and generate a coil magnetic field.
[0006] Furthermore, the substrate includes at least one rigid plate, the first coil winding and the second coil winding are arranged on the substrate in parallel or in series, the rotating shaft has a hollow structure, conductive points are provided on the substrate, the conductive points are respectively connected to the first coil winding and the second coil winding, and the wire passes through the rotating shaft and is electrically connected to the conductive points.
[0007] Furthermore, the first fixing plate and the second fixing plate are respectively provided with grooves, and the permanent magnet assembly is installed in the grooves.
[0008] Furthermore, the permanent magnet group consists of four permanent magnets, which are symmetrically distributed in pairs around the axis of rotation, and the permanent magnets in each pair have opposite polarities.
[0009] Furthermore, a connecting rod is provided between the fixed base and the end cap, the connecting rod passing through the first fixed plate and the second fixed plate and having its two ends fixed to the fixed base and the end cap respectively.
[0010] Furthermore, a receiving groove is provided on the side of the end cover away from the rotor assembly, and a bearing is disposed in the receiving groove. The bearing is sleeved on the bearing, and the outer ring and inner ring of the bearing are loosely fitted with the inner wall of the receiving groove and the outer wall of the shaft, respectively.
[0011] Furthermore, a limiting seat is provided on the side of the end cover away from the rotor assembly, the rotating shaft extends out from the limiting seat, a limiting groove is provided in the limiting seat, a limiting rod is provided in the limiting groove, and the limiting rod is inserted into the rotating shaft along the vertical direction of the rotating shaft.
[0012] Furthermore, a support rod is provided between the control panel and the fixed base.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] Compared with the prior art:
[0015] This application, by arranging permanent magnet groups on both sides of the substrate, allows the first and second coil windings to interact in opposite directions with the magnetic fields of the permanent magnets when energized. This drives the substrate to deflect in the opposite direction around its axis, causing the axis to repeatedly deflect within a certain angle. Compared to existing technologies that arrange magnets on only one side, this application has a better magnetic field strength, thereby increasing the torque of the rotating shaft.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] 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.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is an exploded view of the shell structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the rotor assembly of this utility model;
[0021] Figure 4 This is a schematic diagram of the stator assembly of this utility model;
[0022] Figure 5 This is a schematic diagram of the structure of the limiting seat of this utility model;
[0023] Figure 6 This is a cross-sectional view of the overall structure of this utility model.
[0024] The reference numerals and names in the figure are as follows:
[0025] Housing 100, rotor assembly 200, stator assembly 300, base plate 210, rotating shaft 220, first coil winding 211, second coil winding 212, first fixing plate 310, second fixing plate 320, permanent magnet assembly 330, fixing seat 110, end cover 120, receiving cavity 130, control plate 140, wire 141, conductive point 113, groove 311, permanent magnet 331, connecting rod 150, receiving groove 121, bearing 122, limiting seat 400, limiting groove 410, limiting rod 411, support rod 142. Detailed implementation method:
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] The preferred embodiments of this utility model will now be further described with reference to the accompanying drawings. Figure 1 and Figure 6As shown, the moving coil limited rotation angle device includes a housing 100, a rotor assembly 200 and a stator assembly 300 disposed within the housing 100. The rotor assembly 200 includes a base plate 210 and a rotating shaft 220 passing vertically through the end face of the base plate 210. A first coil winding 211 and a second coil winding 212 are evenly distributed on both end faces of the base plate 210, and the first coil winding 211 and the second coil winding 212 are symmetrically distributed with the rotating shaft 220 as the center. The stator assembly 300 includes a first fixing plate 310 and a second fixing plate 320 arranged parallel to each other on both sides of the base plate 210. Permanent magnet groups 330 are respectively disposed on the side of the first fixing plate 310 and the second fixing plate 320 facing the base plate 210. When the first coil winding 211 and the second coil winding 212 are energized, the first coil winding 211 and the second coil winding 212 drive the rotating shaft 220 to deflect under the action of the magnetic field.
[0032] In this embodiment, the rotating shaft 220 passes through the end face of the substrate 210 and is fixedly connected to the substrate 210. A first coil winding 211 and a second coil winding 212 are respectively provided on the positive and negative end faces of the substrate 210, and the first coil winding 211 and the second coil winding 212 are symmetrically distributed with respect to the rotating shaft 220. A permanent magnet 331 is provided outside the first coil winding 211 and the second coil winding 212. In the working state of this embodiment, when the first coil winding 211 and the second coil winding 212 are simultaneously energized, a wire will be generated. The magnetic field of the coil interacts with the magnetic field of the permanent magnet 331, thereby driving the substrate 210 to rotate around the axis 220. During this process, the axis 220 also rotates synchronously. When the current direction of the first coil winding 211 and the second coil winding 212 is changed, the direction of the generated coil magnetic field will be opposite, thus generating an opposite interaction with the magnetic field of the permanent magnet 331. Therefore, the substrate 210 is driven to deflect in the opposite direction around the axis 220, thereby causing the axis 220 to deflect repeatedly within a certain angle.
[0033] This application provides permanent magnet assemblies 330 on both sides of the substrate 210. When the first coil winding 211 and the second coil are energized, they can generate opposite interactions with the magnetic fields of the permanent magnets 331 on both sides. This drives the substrate 210 to deflect in the opposite direction around the axis 220, causing the axis 220 to deflect repeatedly within a certain angle. Compared with the prior art that provides magnets on one side, this application has a better magnetic field strength, thereby increasing the rotational torque of the axis 220.
[0034] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 6As shown, the housing 100 consists of an annular fixing seat 110 and an end cover 120. A receiving cavity 130 is formed between the fixing seat 110 and the end cover 120. The rotor assembly 200 and the stator assembly 300 are disposed in the receiving cavity 130. The first fixing plate 310 and the second fixing plate 320 are respectively fixed in the fixing seat 110 and the end cover 120. A control plate 140 is provided on the side of the fixing seat 110 away from the end cover 120. The base plate 210 and the control plate 140 are electrically connected through a wire 141. When power is required, the control plate 140 sends an electrical signal to the base plate 210 through the wire 141, so that the first coil winding 211 and the second coil winding 212 are energized and generate a coil magnetic field.
[0035] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 3 As shown, the substrate 210 includes at least one rigid board, which includes a PCB circuit board or other board material that can be used for imprinting wiring. The first coil winding 211 and the second coil winding 212 are arranged in parallel or in series on the substrate 210. The rotating shaft 220 has a hollow structure. Conductive points 113 are provided on the substrate 210. The conductive points 113 are respectively connected to the first coil winding 211 and the second coil winding 212. The wire passes through the rotating shaft 220 and is electrically connected to the conductive points 113. In this way, when the first coil winding 211 and the second coil winding 212 are energized and drive the substrate 210 to rotate, the electrical connection between the wire and the substrate 210 will not be affected during the synchronous rotation of the rotating shaft 220.
[0036] Furthermore, based on the above embodiments, combined with Figure 1 and Figure 4 As shown, the first fixing plate 310 and the second fixing plate 320 are respectively provided with grooves 311, and the permanent magnet assembly 330 is installed in the grooves 311. Compared with the permanent magnet assembly 330 being attached to the surface of the first fixing plate 310 and the second fixing plate 320, the thickness of the entire stator assembly 300 can be further shortened.
[0037] Furthermore, based on the above embodiments, combined with Figure 1 and Figure 4 As shown, the permanent magnet group 330 consists of four permanent magnets 331. The permanent magnets 331 are symmetrically distributed in pairs around the rotation axis 220, and the polarities of the permanent magnets 331 in each pair are opposite. In this way, when the first coil winding 211 and the second coil winding 212 are energized to generate a coil magnetic field, the coil magnetic field and the magnetic field of the permanent magnets 331 can interact, thereby driving the substrate 210 to rotate around the rotation axis 220.
[0038] Furthermore, based on the above embodiments, such as Figure 2 As shown, a connecting rod 150 is provided between the fixed base 110 and the end cap 120. The connecting rod 150 passes through the first fixed plate 310 and the second fixed plate 320 and its two ends are respectively fixed on the fixed base 110 and the end cap 120, thereby fixing the first fixed plate 310 and the second fixed plate 320 inside the fixed base 110 and the end cap 120.
[0039] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 6 As shown, a receiving groove 121 is provided on the side of the end cover 120 away from the rotor assembly 200. A bearing 122 is arranged in the receiving groove 121. The bearing 122 is sleeved on the receiving groove 121, and the outer ring and inner ring of the bearing 122 are loosely fitted with the inner wall of the receiving groove 121 and the outer wall of the rotating shaft 220, respectively. When the rotating shaft 220 rotates, its radial movement depends on the radial runout accuracy of the second bearing 122, eliminating the influence of other factors (such as machining accuracy), thereby making the radial movement of the rotating shaft 220 more controllable.
[0040] Furthermore, based on the above embodiments, such as Figure 2 and Figure 5 As shown, a limiting seat 400 is also provided on the side of the end cover 120 away from the rotor assembly 200. The rotating shaft 220 extends out from the limiting seat 400. A limiting groove 410 is provided in the limiting seat 400. A limiting rod 411 is provided in the limiting groove 410. The limiting rod 411 is inserted into the rotating shaft 220 along the vertical direction of the rotating shaft 220. In this way, when the substrate 210 deflects, the limiting groove 410 and the limiting rod 411 cooperate with each other to limit the deflection angle of the substrate 210.
[0041] Furthermore, based on the above embodiments, such as Figure 2 and Figure 6 As shown, a support rod 142 is provided between the control board 140 and the fixed base 110, and the support rod 142 is used to connect the control board 140 and the fixed base 110.
[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
Claims
1. A moving-coil limited-rotation device, characterized by comprising: The system includes a housing (100), a rotor assembly (200), and a stator assembly (300) disposed within the housing (100). The rotor assembly (200) includes a base plate (210) and a rotating shaft (220) passing vertically through the end face of the base plate (210). A first coil winding (211) and a second coil winding (212) are evenly distributed on both end faces of the base plate (210). The first coil winding (211) and the second coil winding (212) are symmetrically distributed about the rotating shaft (220). The stator assembly (300) includes a first fixing plate (310) and a second fixing plate (320) arranged parallel to each other on both sides of the substrate (210). The first fixing plate (310) and the second fixing plate (320) are respectively provided with permanent magnet groups (330) on the side facing the substrate (210). When the first coil winding (211) and the second coil winding (212) are energized, the first coil winding (211) and the second coil winding (212) drive the rotating shaft (220) to deflect under the action of the magnetic field.
2. The moving-coil limited-angle device according to claim 1, characterized in that The housing (100) consists of an annular fixing seat (110) and an end cap (120). A receiving cavity (130) is formed between the fixing seat (110) and the end cap (120). The rotor assembly (200) and the stator assembly (300) are disposed in the receiving cavity (130). The first fixing plate (310) and the second fixing plate (320) are respectively fixed in the fixing seat (110) and the end cap (120). A control plate (140) is provided on the side of the fixing seat (110) away from the end cap (120). The base plate (210) and the control plate (140) are electrically connected by a wire (141).
3. The moving-coil limited-rotation device according to claim 2, characterized by The substrate (210) includes at least one rigid plate. The first coil winding (211) and the second coil winding (212) are arranged on the substrate (210) in parallel or in series. The rotating shaft (220) has a hollow structure. Conductive points (113) are provided on the substrate (210). The conductive points (113) are respectively connected to the first coil winding (211) and the second coil winding (212). The wire (141) passes through the rotating shaft (220) and is electrically connected to the conductive points (113).
4. The moving-coil limited-angle device according to claim 3, wherein The first fixing plate (310) and the second fixing plate (320) are respectively provided with grooves (311), and the permanent magnet assembly (330) is installed in the grooves (311).
5. The moving coil limited rotation angle device according to claim 4, characterized in that, The permanent magnet group (330) consists of four permanent magnet groups (330), and the permanent magnets (331) are arranged in pairs symmetrically around the axis of rotation (220), and the permanent magnets (331) in each group have opposite polarities.
6. The moving coil limited rotation angle device according to claim 5, characterized in that, A connecting rod (150) is provided between the fixed base (110) and the end cap (120). The connecting rod (150) passes through the first fixed plate (310) and the second fixed plate (320) and its two ends are fixed to the fixed base (110) and the end cap (120) respectively.
7. The moving coil limited rotation angle device according to claim 6, characterized in that, A receiving groove (121) is provided on the side of the end cover (120) away from the rotor assembly (200). A bearing (122) is disposed in the receiving groove (121). The bearing (122) is sleeved on the bearing (122), and the outer ring and inner ring of the bearing (122) are loosely fitted with the inner wall of the receiving groove (121) and the outer wall of the shaft (220), respectively.
8. The moving coil limited rotation angle device according to claim 7, characterized in that, A limiting seat (400) is also provided on the side of the end cover (120) away from the rotor assembly (200). The rotating shaft (220) extends out from the limiting seat (400). A limiting groove (410) is provided in the limiting seat (400). A limiting rod (411) is provided in the limiting groove (410). The limiting rod (411) is inserted into the rotating shaft (220) along the vertical direction of the rotating shaft (220).
9. The moving coil limited rotation angle device according to claim 8, characterized in that, A support rod (142) is provided between the control panel (140) and the fixed base (110).