Limited angle deflection motor

Abstract

The utility model discloses a limited angle deflection motor, which comprises a rotor assembly and a stator assembly, the rotor assembly comprises a rotating shaft, a permanent magnet and a sheet-shaped coil winding, the permanent magnet covers the circumferential outer side of the rotating shaft, the coil winding is arranged outside the permanent magnet in a surrounding manner, the stator assembly comprises a wrapping body, and the wrapping body is arranged on the outer side of the rotating shaft. The outer side of the coil winding is wrapped by the wrapping body in the length direction of the coil winding, a channel allowing the rotor assembly to penetrate through is formed in the wrapping body, the coil winding is tightly attached to the inner wall of the channel through fixing glue, and a first wiring end and a second wiring end are led out of the coil winding towards the outside of the substrate. End covers are arranged at the two ends of the wrapping body, a circuit board is arranged between the coil winding and the end covers, a through groove is formed in the circuit board, and the first wiring end and the second wiring end penetrate through the through groove to be connected with the circuit board.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor structure field, specifically to a limited angle deflection motor. BACKGROUND

[0002] The limited angle deflection motor is a kind of structure design that utilizes electromagnetic field to drive lens to deflect within certain angle, and its application field is wide, including large-scale laser processing equipment, high-speed laser engraving machine field and the like.

[0003] The utility model CN213906405U discloses a one-way magnetic suspension acoustic wave brushless motor, and a magnetic field is formed at the stator core by the coil winding energization, the magnetic steel is located in the magnetic field range, the magnetic steel pushes the rotor core to rotate, and further drives the motor shaft branch to rotate, the coil winding switches the current direction and controls the energization time through external circuit, to make the rotor produce reciprocating motion of left and right rotation, rely on electromagnetic effect to realize the transmission of motion, on the one hand, avoid the elastic structure to be easily damaged when using, make the service life of motor shorter, on the other hand, make the motor of unit volume can transmit greater numerical value of torque, and the structure stability is strong, and the mechanical consumption is low.

[0004] But in the above scheme, the coil is sleeved in the magnetic yoke, the magnetic yoke is the yoke iron made of silicon steel sheet, it is evenly and symmetrically divided in the four around the induction coil, its function is to restrict the induction coil leakage magnetic diffusion to the outside, and in the prior art, the usual method is to design the tooth crown in the magnetic yoke, then coil is unwound on the tooth crown to form winding, but setting tooth crown will increase mechanical noise, make the operation unable to be quiet, increase the wear between each other simultaneously, in addition, the tooth crown directly drives permanent magnet by coil, limits the response speed and precision control of rotating shaft. UTILITY MODEL CONTENTS

[0005] In order to solve the above problems, the utility model provides a kind of limited angle deflection motor, including rotor assembly and stator assembly, the rotor assembly includes rotating shaft, permanent magnet and sheet coil winding, the permanent magnet covers the circumferential outside of rotating shaft, coil winding is ringed and is set at the outside of permanent magnet, the stator assembly includes wrapping body, the wrapping body is formed to the outside of coil winding along the length direction of coil winding, and the wrapping body is provided with the passage for the rotor assembly to pass through, the coil winding is tightly attached to the inner wall of passage by fixed glue, the coil winding leads out first wiring end and second wiring end to the outside of base plate, end cap is arranged at the both ends of wrapping body, circuit board is arranged between coil winding and end cap, the circuit board is provided with through slot, and the first wiring end and the second wiring end are connected with circuit board by passing through through slot.

[0006] Further, the side of the end cap towards the coil winding is provided with a concave portion, and the position of the concave portion is opposite to the position of the through slot.

[0007] Further, the end cover and the wrapper form a first chamber and a second chamber, the channel is the same as the first chamber and the second chamber, a first connecting piece is arranged at one end of the rotating shaft, a second connecting piece is arranged at one end of the rotating shaft, the first connecting piece is arranged in the first chamber, and the second connecting piece is arranged in the second chamber.

[0008] Further, the first connecting piece and the second connecting piece are both in the shape of a cylinder, one end of the first connecting piece and the second connecting piece is provided with a first ring groove, when the first connecting piece and the second connecting piece are connected with the rotating shaft, one end of the rotating shaft is used for being inserted into the first ring groove to form an interference fit, and one end of the first connecting piece, away from the first ring groove, is provided with a groove.

[0009] Further, a limiting rod is arranged on the circumferential end face of the first connecting piece, a limiting groove is arranged in the end cover, and the limiting rod is arranged in the limiting groove.

[0010] Further, a first bearing is arranged in the first chamber, and a second bearing is arranged in the second chamber, the first bearing is sleeved on the first connecting piece, and the second bearing is sleeved on the second connecting piece.

[0011] Further, the outer ring and the inner ring of the first bearing are loosely fitted with the inner wall of the first chamber and the outer wall of the first connecting piece respectively, and the outer ring and the inner ring of the second bearing are loosely fitted with the inner wall of the second chamber and the outer wall of the second connecting piece respectively.

[0012] Further, a limiting ring is arranged outside the first connecting piece, and the front end and the rear end of the first bearing are clamped between the limiting ring and the inner wall of the first chamber respectively.

[0013] Further, an elastic gasket is arranged 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] Further, the wire spacing of the coil winding is between 0.2 and 0.3 mm.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The application forms a wrapping on the outer side of the coil winding in the length direction of the coil winding without tooth crown, and the coil is tightly attached to the inner wall of the channel formed by the wrapping through fixing glue, thereby saving the tooth crown, so that the application can not only reduce the mechanical noise formed by winding the coil on the tooth crown, making the operation more quiet, but also reduce the wear between each other, in addition, the tooth crown is cancelled, and the coil directly drives the permanent magnet, and the response speed and control precision of the rotating shaft are also improved, so that the change of the position signal can be more accurately responded, thereby realizing higher angle control precision. In applications requiring high-precision optical path control, such as laser medical treatment, semiconductor lithography and the like, the precise control requirement of the deflection angle of the optical element can be better met, and the machining precision and performance of the equipment are improved.

[0017] 2. The magnetic field changes relatively gently, and the rotating speed is relatively stable, so that a relatively uniform speed output can be maintained during the working process, which is very important for the galvanometer system which needs to accurately control the deflection angle and position of the optical path. For example, in the field of laser fine machining, stable rotating speed can ensure that the laser beam accurately irradiates the target position, and improve the machining precision, and the rotating speed of the application is relatively low and stable, so that the change of the position signal can be more accurately responded in the closed-loop feedback control process, thereby realizing higher angle control precision. In applications requiring high-precision optical path control, such as laser medical treatment, semiconductor lithography and the like, the precise control requirement of the deflection angle of the optical element can be better met, and the machining precision and performance of the equipment are improved.

[0018] 3. The application adopts a sheet-shaped coil winding, so that the coil winding is more flat in volume, can be installed on a smaller motor for use, and the flat surface can greatly increase the heat dissipation area, so that the heat loss can be reduced under high-speed working condition of the motor, and the heat dissipation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1 is a whole structure exploded view of the present application;

[0021] Figure 2 is a structure schematic view of the end cover of the present application;

[0022] Figure 3 is a structure schematic view of the first connecting piece of the present application;

[0023] Figure 4 Figure 2 is a sectional view of the package body of the present application;

[0024] Figure 5 Figure 3 is a sectional view of the overall structure of the present application.

[0025] The reference signs and names in the drawings are as follows:

[0026] Rotor assembly 100, coil winding 200, rotating shaft 110, permanent magnet 120, package body 300, channel 310, first wiring end 210, second wiring end 220, end cover 320, circuit board 400, through slot 410, inner recess 322, first cavity 330, second cavity 340, first connecting piece 130, second connecting piece 140, first ring groove 131, recess 132, limiting rod 133, limiting groove 321, first bearing 331, second bearing 341, limiting ring 134, elastic gasket 332. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] The present application will be described in more detail. It should be understood that the specific embodiments described herein are intended to explain the present application and are not intended to limit the present application. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intermediate elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intermediate elements can be present therebetween.

[0029] In the description of the utility model, it should be explained that the directions such as '' front, back, top, bottom, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated direction or positional relation is based on the direction or positional relation shown in the drawing usually, just for the convenience of describing the utility model and simplifying the description, under the condition of not making opposite statement, these directions do not indicate and imply that the device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the protection scope of the utility model;Directional words '' inside, outside '' refer to the inside and outside relative to the contour of each component itself.In the description of the utility model, it should be explained that the use of '' first, second '' and the like to limit parts is just for the convenience of distinguishing the corresponding parts, such as no further declaration, the above words have no special meaning, therefore can not be understood as the limitation of the protection scope of the utility model.In the description of the embodiments of the present application, '' multiple '' means two or more, unless otherwise specifically limited.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by the person skilled in the art of the utility model. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not used to limit the utility model.

[0031] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0032] The preferred embodiments of the utility model will be further described in conjunction with the drawings, and the preferred embodiments of the utility model are shown in conjunction with Figure 1 、 Figure 4 And Figure 5 The limited angle deflection motor comprises a rotor assembly 100 and a stator assembly, the rotor assembly 100 comprises a rotating shaft 110, a permanent magnet 120 and a sheet-shaped coil winding 200, the permanent magnet 120 covers the circumferential outer side of the rotating shaft 110, the coil winding 200 is arranged around the outside of the permanent magnet 120, the stator assembly comprises a wrapping body 300, the wrapping body 300 forms a wrapping on 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, the coil winding 200 is tightly adhered to the inner wall of the channel 310 through fixing glue, the coil winding 200 leads out a first wiring end 210 and a second wiring end 220 to the outside of the substrate, end covers 320 are arranged at both ends of the wrapping body 300, a circuit board 400 is arranged between the coil winding 200 and the end cover 320, a through slot 410 is arranged on the circuit board 400, and the first wiring end 210 and the second wiring end 220 are connected with the circuit board 400 by penetrating the through slot 410.

[0033] In the above embodiment, the coil winding 200 is tightly adhered to the inner wall of the channel 310 by the fixing glue, so as to achieve that the first coil winding 200 is suspended outside the permanent magnet 120, and the coil winding 200 is spatially wrapped outside the permanent magnet 120. When the coil winding 200 is energized through the first connecting terminal 210 and the second connecting terminal 220 and the circuit board 400, the permanent magnet 120 wrapped on the rotating shaft 110 generates opposite polarity, and the rotating shaft 110 is driven to rotate in the coil winding 200 under the magnetic field effect.

[0034] In the above embodiment, the coil winding 200 is tightly adhered to the inner wall of the channel 310 by the fixing glue, so as to achieve that the first coil winding 200 is suspended outside the permanent magnet 120, and the coil winding 200 is spatially wrapped outside the permanent magnet 120. When the coil winding 200 is energized through the first connecting terminal 210 and the second connecting terminal 220 and the circuit board 400, the permanent magnet 120 wrapped on the rotating shaft 110 generates opposite polarity, and the rotating shaft 110 is driven to rotate in the coil winding 200 under the magnetic field effect.

[0035] In the above embodiment, the coil winding 200 is tightly adhered to the inner wall of the channel 310 by the fixing glue, so as to achieve that the first coil winding 200 is suspended outside the permanent magnet 120, and the coil winding 200 is spatially wrapped outside the permanent magnet 120. When the coil winding 200 is energized through the first connecting terminal 210 and the second connecting terminal 220 and the circuit board 400, the permanent magnet 120 wrapped on the rotating shaft 110 generates opposite polarity, and the rotating shaft 110 is driven to rotate in the coil winding 200 under the magnetic field effect. Figure 2 Figure 3 As shown in Figs. 4 and 5, the end cover 320 is provided with an inner recess 322 on the side facing the coil winding 200, and the position of the inner recess 322 is opposite to the position of the through groove 410. In this way, after the first connecting terminal 210 and the second connecting terminal 220 are extended from the through groove 410, there is sufficient rotation space in the inner recess 322 to connect the circuit board 400.

[0036] In the above embodiment, the coil winding 200 is tightly adhered to the inner wall of the channel 310 by the fixing glue, so as to achieve that the first coil winding 200 is suspended outside the permanent magnet 120, and the coil winding 200 is spatially wrapped outside the permanent magnet 120. When the coil winding 200 is energized through the first connecting terminal 210 and the second connecting terminal 220 and the circuit board 400, the permanent magnet 120 wrapped on the rotating shaft 110 generates opposite polarity, and the rotating shaft 110 is driven to rotate in the coil winding 200 under the magnetic field effect. Figure 2 Figure 3 Figure 5 ​​​As shown, the end cover 320 and the package 300 form a first chamber 330 and a second chamber 340, the channel 310 is the same as the first chamber 330 and the second chamber 340, a first connecting piece 130 is arranged at one end of the rotating shaft 110, 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.

[0037] Further based on the above embodiments, in combination with Figure 2 and 3 As shown, the first connecting piece 130 and the second connecting piece 140 are both cylindrical in shape, one end of the first connecting piece 130 and the second connecting piece 140 is provided with a first ring groove 131, when the first connecting piece 130 and the second connecting piece 140 are connected with the rotating shaft 110, one end of the rotating shaft 110 is used to insert the first ring groove 131 to form an interference fit, so that when the rotating shaft 110 is driven to rotate in the interior of the coil winding 200 under the effect of the magnetic field, the first connecting piece 130 and the second connecting piece 140 can be driven to rotate synchronously, one end of the first connecting piece 130 away from the first ring groove 131 is provided with a groove 132, the groove 132 can clamp different functional components according to different application scenarios, for example, in the galvanometer system of the present application, the groove 132 can be used to clamp an optical lens.

[0038] Further based on the above embodiments, in combination with Figure 2 and Figure 3 As shown, a limiting rod 133 is arranged on the circumferential end face of the first connecting piece 130, a limiting groove 321 is arranged in the end cover 320, the limiting rod 133 is arranged in the limiting groove 321, when the rotating shaft 110 drives the first connecting piece 130 to rotate synchronously under the effect of the magnetic field, the limiting rod 133 and the limiting groove 321 cooperate to limit the rotation angle of the first connecting piece 130, thereby also limiting the rotation angle of the rotating shaft 110.

[0039] Further based on the above embodiments, in combination with Figure 1 , Figure 4 and Figure 5 As shown, 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, since the first connecting piece 130 and the second connecting piece 140 are respectively connected at both 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.

[0040] Further based on the above embodiments, as shown in Figure 5 the outer ring and inner ring of the first bearing 331 are loosely fitted with the inner wall of the first chamber 330 and the outer wall of the first connecting piece 130 respectively, so that the movement of the first bearing 331 in the radial direction between the first chamber 330 and the first connecting piece 130 is limited, and the outer ring and inner ring of the second bearing 341 are loosely fitted with the inner wall of the second chamber 340 and the outer wall of the second connecting piece 140 respectively, so that the movement of the second bearing 341 in the radial direction between the second connecting piece 140 and the second chamber 340 is limited, so that the radial movement of the rotating shaft 110 during rotation depends on the radial runout accuracy of the first bearing 331 and the second bearing 341, eliminating the influence of other factors, so that the radial movement of the rotating shaft 110 is more controllable.

[0041] Further based on the above embodiments, as shown in Figure 3 and Figure 5 a limiting ring 134 is provided outside the first connecting piece 130, and the front end and rear end of the first bearing 331 are respectively clamped between the limiting ring 134 and the inner wall of the first chamber 330, so that the cooperation between the limiting ring 134 and the inner wall of the first chamber 330 limits the first bearing 331 from front to back, thereby preventing the first bearing 331 from moving front and back when the rotating shaft 110 rotates.

[0042] Further based on the above embodiments, as shown in Figure 1 and Figure 5 an elastic gasket 332 is provided between the first bearing 331 and the inner wall of the first chamber 330, and the elastic gasket 332 is pre-pressed on one side of the first bearing 331, so that when the rotating shaft 110 deflects in the radial direction, the first bearing 331 will be extruded against the elastic gasket 332, thereby making the first bearing 331 operate more stably as a whole.

[0043] Further based on the above embodiments, the wire spacing of the coil winding 200 is between 0.2 and 0.3 mm, and such wire spacing can ensure that the process difficulty does not increase, and the first energized coil and the second energized coil can surround more turns on the end face of the substrate to the maximum extent.

[0044] The details of the above exemplary embodiments, and without departing from the spirit or essential characteristics of the present application, can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A limited angle deflection motor characterized by, The application relates to a rotor assembly (100) and a stator assembly, the rotor assembly (100) comprising a rotating shaft (110), a permanent magnet (120) covering the circumferential outer side of the rotating shaft (110), and a sheet-shaped coil winding (200) arranged around the outside of the permanent magnet (120), the stator assembly comprising a wrapping body (300) wrapping 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 being arranged in the wrapping body (300), the coil winding (200) being tightly attached to the inner wall of the channel (310) through fixing glue, the coil winding (200) leading out a first connecting terminal (210) and a second connecting terminal (220) to the outside of the base plate, end covers (320) being arranged at both ends of the wrapping body (300), a circuit board (400) being arranged between the coil winding (200) and the end covers (320), the circuit board (400) being provided with a through slot (410), and the first connecting terminal (210) and the second connecting terminal (220) being connected to the circuit board (400) through the through slot (410).

2. The limited angle deflection motor of claim 1, wherein, The end cover (320) is provided with an inner recess (322) on the side facing the coil winding (200), and the position of the inner recess is opposite to the position of the through slot (410).

3. The limited angle deflection motor of claim 2, wherein, First and second cavities (330 and 340) are formed between the end cover (320) and the wrapping body (300), the channel (310) is the same as the first and second cavities (330 and 340), a first connecting piece (130) is arranged at one end of the rotating shaft (110), 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 cavity (330), and the second connecting piece (140) is arranged in the second cavity (340).

4. The limited angle deflection motor of claim 3, wherein, The first and second connecting pieces (130 and 140) are both in the shape of a cylinder, one end of each of the first and second connecting pieces (130 and 140) is provided with a first ring groove (131), when the first and second connecting pieces (130 and 140) are connected to the rotating shaft (110), one end of the rotating shaft (110) is used for being inserted into the first ring groove (131) to form an interference fit, and the end of the first connecting piece (130) away from the first ring groove (131) is provided with a groove (132).

5. The limited angle deflection motor of 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), and the limiting rod (133) is arranged in the limiting groove (321).

6. The limited angle deflection motor of 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) being sleeved on the first connecting member (130), and the second bearing (341) being sleeved on the second connecting member (140).

7. The limited angle deflection motor of claim 6, wherein, The outer ring and the inner ring of the first bearing (331) are loosely fitted with the inner wall of the first chamber (330) and the outer wall of the first connecting member (130) respectively, and the outer ring and the inner ring of the second bearing (341) are loosely fitted with the inner wall of the second chamber (340) and the outer wall of the second connecting member (140) respectively.

8. The limited angle deflection motor of claim 7, wherein, A limiting ring (134) is arranged on the outer side of the first connecting member (130), and the front end and the rear end of the first bearing (331) are clamped between the limiting ring (134) and the inner wall of the first chamber (330) respectively.

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

10. The limited angle deflection motor of claim 1, wherein, The wire pitch of the coil winding (200) is between 0.2 and 0.3 mm.

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