Non-plugging force motor

Abstract

The invention discloses a non-plugging force motor, which comprises a rotor assembly and a stator assembly, and is characterized in that the rotor assembly comprises a rotor ring, a ring groove is formed in the rotor ring, a plurality of permanent magnet groups are configured in the ring groove, gaps exist among the permanent magnet groups, and a rotating shaft is arranged in the rotor ring; the stator assembly comprises a coil winding which is coupled into a ring shape, a supporting sleeve is arranged in the coil winding, and when the rotor assembly and the stator assembly are assembled, the coil winding is inserted into a gap between the permanent magnet sets. According to the invention, the plurality of permanent magnet groups are arranged in the annular groove, so that the magnetic force between the permanent magnet groups is offset, and the coil winding is hardly interfered by the magnetic force when being plugged in and pulled out of the gap between the permanent magnet groups, so that the stator assembly and the rotor assembly are not obstructed by the magnetic force when being plugged in and pulled out for assembly, and the assembly efficiency of the stator assembly and the rotor assembly is improved. Therefore, assembly without insertion and extraction force is realized.

Description

Technical Field

[0001] The invention relates to the field of motor structures, and in particular to a motor without plugging and unplugging force. Background Art

[0002] In the prior art, whether it is an outer rotor motor or an inner rotor motor, when assembling the stator assembly and the rotor assembly, there is a problem that it is difficult to separate them once they are assembled together. The reason is that whether it is an outer rotor motor or an inner rotor motor, its rotor assembly is provided with a permanent magnet, and the material of its stator assembly is mostly metal. Therefore, when the stator assembly and the rotor assembly are assembled, the magnetic force of the permanent magnet causes the stator assembly to be adsorbed by the rotor assembly, so that when it is necessary to disassemble the two, a lot of force is required to pull the two apart, which is time-consuming and labor-intensive. This phenomenon is particularly obvious in small and micro motors. Summary of the invention

[0003] In order to solve the above-mentioned problems, the present invention provides a zero-plug-in-force motor, including a rotor assembly and a stator assembly, the rotor assembly including a rotor ring, an annular groove is arranged in the rotor ring, a plurality of permanent magnet groups are arranged in the annular groove, there is a gap in the middle of the permanent magnet group, and a rotating shaft is arranged in the rotor ring; the stator assembly includes a coil winding coupled into a ring shape, a support sleeve is arranged in the coil winding, and when the rotor assembly and the stator assembly are assembled, the coil winding is inserted into the gap in the middle of the permanent magnet group.

[0004] Furthermore, the permanent magnet group includes a first permanent magnet and a second permanent magnet arranged opposite to each other in the annular groove, the gap is arranged between the first permanent magnet and the second permanent magnet, and when the rotor assembly and the stator assembly are assembled, the coil winding is inserted between the first permanent magnet and the second permanent magnet.

[0005] Furthermore, an inner ring concentric with the rotor ring is arranged inside the rotor ring, the annular groove is composed of the inner wall of the rotor ring and the outer wall of the inner ring, and the first permanent magnet and the second permanent magnet are respectively tightly fixed on the inner wall of the rotor ring and the outer wall of the inner ring and are arranged opposite to each other.

[0006] Furthermore, the magnetic poles of the first permanent magnet and the second permanent magnet on opposite sides of the annular groove are the same.

[0007] Furthermore, a side cover is formed on one side of the rotor ring, the rotating shaft is fixed on the side cover, and the rotating shaft passes through the rotor ring and the center position of the ring groove.

[0008] Furthermore, the support sleeve is a hollow cylinder, and a convex ring is protruded outwardly along the circumference of the support sleeve on one side of the support sleeve, and the convex ring is fixedly connected to the coil winding coupled into a ring shape.

[0009] Furthermore, the support sleeve is provided with a first bearing and a second bearing, both of which are sleeved on the rotating shaft, and the outer rings and inner rings of the first bearing and the second bearing are loosely fitted with the inner wall of the support sleeve and the outer wall of the rotating shaft respectively.

[0010] Furthermore, a first limiting step is provided between the first bearing and the second bearing, a second limiting step is provided on the side of the side cover facing the annular groove, and the first bearing is located between the first limiting step and the second step.

[0011] Furthermore, a buffer gasket is provided between the second limiting step and the first bearing.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present application arranges a plurality of groups of permanent magnets in the annular groove so that the magnetic forces between the permanent magnet groups are offset. Thus, when the coil winding is inserted into the gap between the permanent magnet groups, it will hardly be interfered by the magnetic force. Therefore, when the stator assembly and the rotor assembly are plugged in and out, there will be no obstruction from the magnetic force, thereby achieving assembly without plug-in force. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is an exploded view of the overall structure of the present invention; Figure 2 is a structural exploded view of the rotor assembly of the present invention; Figure 3 It is a structural exploded view from another angle of the rotor assembly of the present invention; Figure 4 It is a structural exploded view of the stator assembly of the present invention; Figure 5 It is a cross-sectional view of the overall structure of the present invention.

[0015] The reference numerals and names in the figures are as follows: Rotor assembly 100, stator assembly 200, rotor ring 110, annular groove 120, permanent magnet group 130, gap 131, rotating shaft 140, coil winding 210, support sleeve 220, first permanent magnet 132, second permanent magnet 133, inner ring 111, side cover 150, convex ring 221, first bearing 230, second bearing 240, first limiting step 250, second limiting step 151, buffer gasket 260. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention is described in more detail. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween.

[0018] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present invention, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning, and therefore cannot be understood as limiting the scope of protection of the present invention. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0019] The preferred embodiments of the present invention are now further described in conjunction with the accompanying drawings. Figures 1 to 4 As shown, a zero-plug-in-force motor includes a rotor assembly 100 and a stator assembly 200, the rotor assembly 100 includes a rotor ring 110, an annular groove 120 is arranged in the rotor ring 110, a plurality of permanent magnet groups 130 are arranged in the annular groove 120, there is a gap 131 in the middle of the permanent magnet group 130, and a rotating shaft 140 is arranged in the rotor ring 110; the stator assembly 200 includes a coil winding 210 coupled into a ring shape, a support sleeve 220 is arranged in the coil winding 210, and the support sleeve 220 is sleeved on the rotating shaft 140, when the rotor assembly 100 and the stator assembly 200 are assembled, the coil winding 210 is inserted into the gap 131 in the middle of the permanent magnet group 130.

[0020] When this embodiment is working, the permanent magnet group 130 is set in the annular groove 120, and then the coil winding 210 coupled into a ring shape is inserted into the gap 131. When the coil winding 210 is energized, the magnetic field effect generated will drive the permanent magnet group 130 to drive the rotor ring 110 to rotate, thereby driving the rotating shaft 140 to rotate.

[0021] Compared with the prior art, the present application arranges a plurality of permanent magnet groups 130 in the annular groove 120 so that the magnetic forces between the permanent magnet groups 130 are offset. Thus, when the coil winding 210 is inserted into the gap 131 between the permanent magnet groups 130, it will hardly be interfered by the magnetic force. Therefore, when the stator assembly 200 and the rotor assembly 100 are plugged in and out, there will be no obstruction from the magnetic force, thereby achieving assembly without plug-in force.

[0022] On the basis of the above embodiments, Figure 2 and Figure 3 As shown, the permanent magnet group 130 includes a first permanent magnet 132 and a second permanent magnet 133 which are relatively arranged in the annular groove 120, and the gap 131 is arranged between the first permanent magnet 132 and the second permanent magnet 133. When the rotor assembly 100 and the stator assembly 200 are assembled, the coil winding 210 is inserted between the first permanent magnet 132 and the second permanent magnet 133. Since the first permanent magnet 132 and the second permanent magnet 133 are relatively arranged in the annular groove 120, the magnetic forces in the gap 131 between the first permanent magnet 132 and the second permanent magnet 133 are offset. In this way, when the coil winding 210 is inserted into the gap 131 in the middle of the permanent magnet group 130, it will hardly be obstructed by the magnetic force, thereby achieving assembly without plug-in force.

[0023] On the basis of the above embodiments, Figure 2 and Figure 3 As shown, an inner ring 111 concentric with the rotor ring 110 is arranged inside the rotor ring 110, the annular groove 120 is composed of the inner wall of the rotor ring 110 and the outer wall of the inner ring 111, the first permanent magnet 132 and the second permanent magnet 133 are respectively tightly fixed on the inner wall of the rotor ring 110 and the outer wall of the inner ring 111 and are arranged opposite to each other. At this time, when the coil winding 210 is energized, the magnetic field effect generated will drive the permanent magnet group 130 to drive the rotor ring 110 and the inner ring 111 to rotate, thereby driving the rotating shaft 140 to rotate.

[0024] On the basis of the above embodiments, Figure 2 and Figure 3 As shown, the first permanent magnet 132 and the second permanent magnet 133 have the same magnetic poles on the opposite sides of the annular groove 120, so that the magnetic forces between the permanent magnet groups 130 are offset. In this way, when the coil winding 210 is inserted into the gap 131 in the middle of the permanent magnet group 130, it will hardly be interfered by the magnetic force. Therefore, when the stator assembly 200 and the rotor assembly 100 are plugged in and out, there will be no obstruction from the magnetic force, thereby achieving assembly without plug-in force.

[0025] On the basis of the above embodiments, Figure 3 As shown, a side cover 150 is formed on one side of the rotor ring 110, and the rotating shaft 140 is fixed on the side cover 150. The rotating shaft 140 passes through the center position of the rotor ring 110 and the ring groove 120. When the coil winding 210 is energized, the magnetic field effect generated will drive the permanent magnet group 130 to drive the rotor ring 110 to rotate, thereby driving the rotating shaft 140 to rotate along the center position of the rotor ring 110 and the ring groove 120.

[0026] On the basis of the above embodiments, Figure 4 As shown, the support sleeve 220 is a hollow cylinder, and a convex ring 221 protrudes outward along the circumference of the support sleeve 220 on one side of the support sleeve 220, and the convex ring 221 is fixedly connected to the coil winding 210 coupled into a ring shape, so that when the rotor assembly 100 and the stator assembly 200 are assembled, the coil winding 210 is inserted into the gap 131 between the first permanent magnet 132 and the second permanent magnet 133, and the inner ring 111 is inserted into the gap between the coil winding 210 and the support sleeve 220.

[0027] On the basis of the above embodiments, Figure 4 and Figure 5As shown, the support sleeve 220 is provided with a first bearing 230 and a second bearing 240, and the first bearing 230 and the second bearing 240 are both sleeved on the rotating shaft 140, and the outer rings and inner rings of the first bearing 230 and the second bearing 240 are loosely fitted with the inner wall of the support sleeve 220 and the outer wall of the rotating shaft 140 respectively, so that when the rotating shaft 140 rotates, its radial movement depends on the radial runout accuracy of the first bearing 230 and the second bearing 240, eliminating the influence of other factors (such as processing accuracy), thereby making the radial movement of the rotating shaft 140 more controllable.

[0028] In some embodiments, Figure 5 As shown, a first limiting step 250 is provided between the first bearing 230 and the second bearing 240, and the first limiting step 250 is used to limit the axial movement of the first bearing 230 and the second bearing 240. In some embodiments, a second limiting step 151 is provided on the side of the side cover 150 facing the annular groove 120, and the first bearing 230 is located between the first limiting step 250 and the second step, and the second limiting step 151 is used to cooperate with the first limiting step 250 to limit the axial movement of the first bearing 230.

[0029] In some embodiments, Figure 5 As shown, a buffer gasket 260 is provided between the second limiting step 151 and the first bearing 230 , and the buffer gasket 260 is used to reduce the friction on the side cover 150 when the first bearing 230 rotates along with the rotating shaft 140 .

[0030] The details of the exemplary embodiments described above are not limited to the embodiments described above, and the invention may be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive in all respects, and the scope of the invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the invention.

Claims

1. A motor without plugging and unplugging force, characterized in that: The invention comprises a rotor assembly (100) and a stator assembly (200); the rotor assembly (100) comprises a rotor ring (110), an annular groove (120) is arranged in the rotor ring (110), a plurality of permanent magnet groups (130) are arranged in the annular groove (120), a gap (131) exists in the middle of the permanent magnet groups (130), and a rotating shaft (140) is arranged in the rotor ring (110); the stator assembly (200) comprises a coil winding (210) coupled into a ring shape, a support sleeve (220) is arranged in the coil winding (210), and when the rotor assembly (100) and the stator assembly (200) are assembled, the support sleeve (220) is sleeved on the rotating shaft (140), and the coil winding (210) is inserted into the gap (131) in the middle of the permanent magnet groups (130).

2. The zero-plug-in force motor according to claim 1, characterized in that: The permanent magnet group (130) comprises a first permanent magnet (132) and a second permanent magnet (133) which are arranged opposite to each other in the annular groove (120); the gap (131) is arranged between the first permanent magnet (132) and the second permanent magnet (133); and when the rotor assembly (100) and the stator assembly (200) are assembled, the coil winding (210) is inserted between the first permanent magnet (132) and the second permanent magnet (133).

3. The zero-plugging force motor according to claim 2, characterized in that: An inner ring (111) concentric with the rotor ring (110) is arranged inside the rotor ring (110); the annular groove (120) is composed of an inner wall of the rotor ring (110) and an outer wall of the inner ring (111); the first permanent magnet (132) and the second permanent magnet (133) are respectively tightly fixed on the inner wall of the rotor ring (110) and the outer wall of the inner ring (111) and are arranged opposite to each other.

4. The zero-plugging force motor according to claim 3, characterized in that: The magnetic poles of the first permanent magnet (132) and the second permanent magnet (133) on opposite sides of the annular groove (120) are the same.

5. The zero-plugging force motor according to claim 1, characterized in that: A side cover (150) is formed on one side of the rotor ring (110), the rotating shaft (140) is fixed on the side cover (150), and the rotating shaft (140) passes through the rotor ring (110) and the center position of the annular groove (120).

6. The zero-plug-in force motor according to claim 5, characterized in that: The support sleeve (220) is a hollow cylinder, and a convex ring (221) protrudes outward along the circumference of the support sleeve (220) on one side of the support sleeve (220), and the convex ring (221) is fixedly connected to the coil winding (210) coupled into a ring shape.

7. The zero-plugging-force motor according to claim 6, characterized in that: The support sleeve (220) is provided with a first bearing (230) and a second bearing (240); the first bearing (230) and the second bearing (240) are both sleeved on the rotating shaft (140); the outer ring and the inner ring of the first bearing (230) and the first bearing (230) are loosely fitted to the inner wall of the support sleeve (220) and the outer wall of the rotating shaft (140), respectively.

8. The zero-plugging force motor according to claim 7, characterized in that: A first limiting step (250) is provided between the first bearing (230) and the second bearing (240), a second limiting step (151) is provided on a side of the side cover (150) facing the annular groove (120), and the first bearing (230) is located between the first limiting step (250) and the second step.

9. The zero-plugging-force motor according to claim 8, characterized in that: A buffer gasket (260) is provided between the second limiting step (151) and the first bearing (230).

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