Frameless motor stator, frameless motor and rotating device

Abstract

The utility model discloses a frameless motor stator, a frameless motor and a rotating device, and relates to the technical field of frameless motors. The frameless motor stator comprises a stator core and a stator winding, the stator core comprises an outer ring and an inner ring fixedly arranged on the inner side of the outer ring, the inner ring is provided with a plurality of tooth units arranged in the circumferential direction of the inner ring, and winding wires of the stator winding are wound around the tooth units; an inner hole of the inner ring is used for assembling a magnetic ring, and the outer ring is of an integrally-formed structure. The outer ring of the stator is of the integrally-formed structure, the flatness of the outer side face of the integrally-formed outer ring is good, optimization of a magnetic circuit is facilitated, the performance of the frameless motor is improved, the manufacturing of the integrally-formed outer ring is simple, the processing efficiency is improved, and the assembly cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the motor technical field, and in particular to a frameless motor stator, a frameless motor and a rotating device. BACKGROUND

[0002] The frameless motor is widely used in various rotating devices due to its small size and high torque. At present, the stator core of the frameless motor usually adopts a block structure, and each block is spliced to form the stator core by welding or other methods. The flatness of the outer side of the stator core formed by splicing the blocks is poor, which affects the performance of the frameless motor. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a frameless motor stator, a frameless motor and a rotating device, which can solve the problem of poor flatness of the outer side of the stator core.

[0004] According to an aspect of the present application, a frameless motor stator is provided in an embodiment, comprising a stator core and a stator winding, the stator core comprising an outer ring and an inner ring fixedly arranged on the inner side of the outer ring, the inner ring having a plurality of tooth units arranged along the circumference of the inner ring, and the winding of the stator winding being wound on the tooth units; the inner hole of the inner ring is used for assembling a magnetic ring, and the outer ring is an integral molding structure.

[0005] In one embodiment, an end of the tooth unit away from the outer ring is provided with a shoulder, the shoulder protrudes from both sides of the tooth unit along the circumference of the inner ring, and the adjacent two tooth units are fixedly connected through the shoulder.

[0006] In one embodiment, the inner ring is an integral molding structure.

[0007] In one embodiment, the inner ring and the outer ring are connected in interference fit.

[0008] In one embodiment, the adjacent two tooth units are fixedly connected through the shoulder by welding.

[0009] In one embodiment, the inner ring and the outer ring are integrally formed, the teeth of the tooth unit extend towards the inner hole of the inner ring, the adjacent teeth in the inner ring form a winding slot, and an end of the winding slot away from the outer ring penetrates through the inner ring and communicates with the inner hole.

[0010] In one embodiment, a plurality of insulation skeletons are further included, the insulation skeletons are inserted on the tooth units from the axial direction of the stator, and the winding of the stator winding is wound on the insulation skeletons.

[0011] According to another aspect of the present application, a frameless motor is provided in an embodiment, comprising a magnetic ring and a frameless motor stator as described above, the magnetic ring is arranged in the inner hole of the inner ring.

[0012] In one embodiment, the magnetic ring comprises a fixed ring and a plurality of magnetic steels distributed along the circumference of the fixed ring, the magnetic steels are connected to the outer side of the fixed ring.

[0013] According to still another aspect of the present application, a rotary device is provided in an embodiment, comprising a fixed part, a rotary shaft to be driven, and a frameless motor as described above, the frameless motor stator is fixed on the fixed part, and the rotary shaft to be driven is inserted into the fixed ring and fixedly connected with the fixed ring.

[0014] According to the frameless motor stator, the frameless motor and the rotary device of the above-mentioned embodiments, the outer ring of the stator is of an integral molding structure, the outer side of the integrally molded outer ring has good flatness, which is conducive to optimizing the magnetic circuit and improving the performance of the frameless motor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Structure diagram of a frameless motor stator of an embodiment;

[0016] Figure 2 Structure diagram of an outer ring of an embodiment;

[0017] Figure 3 Structure diagram of an inner ring of an embodiment;

[0018] Figure 4 Structure diagram of an outer ring and an inner ring integrally arranged of an embodiment;

[0019] Figure 5 Structure diagram of an insulation framework arranged on a tooth unit of an embodiment;

[0020] Figure 6 Structure diagram of a frameless motor of an embodiment;

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1-outer ring; 2-inner ring, 201-inner hole, 202-tooth unit, 203-shoulder, 204-winding slot; 3-insulation framework; 4-stator; 5-magnetic ring; 6-stator winding. DETAILED DESCRIPTION

[0023] The application will be described in further detail below with specific reference being made to the drawings. Like elements in the different embodiments are denoted by like reference numerals. In the following description, numerous specific details are set forth in order to provide a better understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the features described herein can be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail since it would be appreciated by persons skilled in the art that, in light of the overall teachings of the present application, these details do not affect the application's overall function. In addition, some operations related to the application are not shown or described in the specification in order to avoid the core of the application being overwhelmed by excessive description, and it is not necessary for a person skilled in the art to describe these related operations in detail according to the description in the specification and general technical knowledge in the art.

[0024] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially changed or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the sequence is necessary, unless otherwise stated that a certain sequence must be followed.

[0025] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0026] In the related art, the stator core of the frameless motor usually adopts a block structure, and each block is spliced to form the stator core by welding or the like. The flatness of the outer side of the stator core formed by splicing the blocks is poor. To this end, the outer ring of the stator is provided as an integrally formed structure, and the flatness of the outer side of the integrally formed outer ring is good, which is beneficial to optimizing the magnetic circuit and improving the performance of the frameless motor.

[0027] Please refer to Figures 1 to 6 The embodiment of the application provides a frameless motor stator 4, which comprises a stator core, a stator winding 6, and other functional components as needed, which will be described in detail below.

[0028] The stator core in the embodiment comprises an outer ring 1 and an inner ring 2 fixedly arranged on the inner side of the outer ring 1. The inner ring 2 has a plurality of tooth unit 202 arranged along the circumference of the inner ring 2, and the winding of the stator winding 6 is arranged on the tooth unit 202. The inner hole 201 of the inner ring 2 is used to assemble the magnetic ring 5, and the outer ring 1 is an integrally formed structure.

[0029] The frameless motor in the embodiment is a motor without a shell, and does not include a rotating shaft. The stator core in the embodiment includes an outer ring 1 and an inner ring 2. The outer ring 1 is a one-piece structure, so that the flatness of the outer side surface of the outer ring 1 is good, which is beneficial to optimizing the magnetic circuit. The one-piece structure of the outer ring 1 is simple to manufacture, which is beneficial to improving the processing efficiency and reducing the assembly cost. Because the frameless motor does not have an additional shell, the outer side surface of the outer ring 1 forms the outer surface of the frameless motor, which is beneficial to reducing the volume of the motor.

[0030] It can be understood that, as shown in Figure 2 The one-piece structure, i.e., the outer ring 1 in the embodiment, is a whole structure, and any connection process such as welding, splicing, and bonding is not needed when the outer ring 1 is manufactured. The outer ring 1 in the embodiment can be manufactured by, but is not limited to, processes such as casting, forging, and turning. The inner ring 2 in the embodiment has an inner hole 201 for assembling a magnetic ring 5 of the frameless motor. The inner ring 2 is not directly connected with the magnetic ring 5. After assembly, the magnetic ring 5 can rotate in the inner hole 201 of the inner ring 2. The magnetic ring 5 in the embodiment does not have a rotating shaft. The frameless motor is connected with a rotating shaft to be driven through the inner side wall of the magnetic ring 5, so as to drive the use object and serve as a power source of the use object. The stator winding 6 in the embodiment can be a three-phase winding. The arrangement of the winding on the tooth unit 202 is not specifically limited, and a rotating magnetic field can be generated.

[0031] In an embodiment, as shown in Figure 3 An end of the tooth unit 202 away from the outer ring 1 is provided with a shoulder 203. The shoulder 203 protrudes from the two sides of the tooth unit 202 along the circumference of the inner ring 2, and the adjacent two tooth units 202 are fixedly connected through the shoulders 203. The shoulder 203 protrudes from the side wall of the tooth unit 202. The adjacent two tooth units 202 are fixedly connected by the shoulder 203 and the shoulder 203, so that the adjacent two tooth units 202 have a spacing. The spacing forms a winding slot 204 on the stator core, and provides a winding space for the winding of the stator winding 6. The specific shape of the shoulder 203 is not limited in the embodiment, as long as the shoulder 203 can be connected and form the winding slot 204. After the shoulder 203 is fixedly connected with the shoulder 203, the inner hole 201 of the inner ring 2 is formed. The inner hole 201 of the inner ring 2 in the embodiment can be a circular hole.

[0032] In one embodiment, the inner ring 2 is integrally formed, and the two shoulders 203 between the two adjacent tooth units 202 are connected during manufacturing, so that no additional connection process is required during assembly, and the inner ring 2 is simple to manufacture. When the inner ring 2 is integrally formed, the inner ring 2 and the outer ring 1 can be connected by interference fit, and the inner ring 2 can be fixed in the outer ring 1 by hot fitting during assembly. The interference fit connection is beneficial to simplify the manufacturing and reduce the assembly cost. In some embodiments, the inner ring 2 and the outer ring 1 can also be connected by other means, such as bonding.

[0033] In one embodiment, the two adjacent tooth units 202 are fixed by welding through the shoulder 203, which is beneficial to the winding process of the stator winding 6 on the tooth unit 202. The inner ring 2 formed by welding can also be arranged in the outer ring 1 by interference fit, or can also be arranged in the outer ring 1 by bonding. In some application scenarios, the two adjacent tooth units 202 can also be connected by the shoulder 203 and the shoulder 203 clamping.

[0034] In one embodiment, as shown in Figure 4 , the inner ring 2 and the outer ring 1 are integrally formed, the teeth of the tooth unit 202 extend towards the inner hole 201 of the inner ring 2, and the winding groove 204 is formed between the adjacent teeth in the inner ring 2. The end of the winding groove 204 away from the outer ring 1 penetrates the inner ring 2 and communicates with the inner hole 201. When the inner ring 2 and the outer ring 1 are integrally formed, the inner ring 2 and the outer ring 1 do not need to be assembled by additional connection process, which is beneficial to reduce the assembly cost. The winding groove 204 in the present embodiment communicates with the inner hole 201 of the inner ring 2, which is beneficial to the winding of the stator winding 6 on the tooth unit 202. At this time, the end face of the tooth unit 202 close to the end of the inner hole 201 forms the hole wall surface of the inner hole 201, and the hole wall of the inner hole 201 is surrounded by the end faces of the plurality of tooth units 202.

[0035] In one embodiment, as shown in Figure 5 , it also includes a plurality of insulation skeletons 3, the insulation skeletons 3 are inserted on the tooth units 202 from the axial direction of the stator 4, and the winding of the stator winding 6 is wound on the insulation skeletons 3. The insulation skeletons 3 in the present embodiment can be but not limited to plastic material, and the insulation skeletons 3 arranged can electrically isolate the stator core and the stator winding 6. In some embodiments, the insulation skeletons 3 can be integrally injection molded on the tooth units 202.

[0036] In some embodiments, in order to facilitate the installation and use of the frameless motor, an installation part can also be arranged on the stator core, for example, an installation hole or an installation lug can be arranged on the outer ring 1. Alternatively, in order to form a good fixation, a limiting groove or a limiting protrusion can be arranged on the outer circumference or the two end faces of the outer ring 1, and the limiting groove or the limiting protrusion can be matched with the limiting part arranged on the rotating device to form a limiting part. In some application scenarios, the outer contour of the outer ring 1 can also be non-circular. In some application scenarios, the outer ring 1 can also not need to be additionally provided with a connecting structure, and the stator 4 can be fixed by interference fit, adhesion or the like during assembly.

[0037] In the frameless motor stator 4 described above, the outer ring 1 is a one-piece structure, the outer side surface of the one-piece outer ring 1 has good flatness, which is beneficial to optimize the magnetic circuit and improve the performance of the frameless motor, and the one-piece outer ring 1 is simple to manufacture, which is beneficial to improve the processing efficiency and reduce the assembly cost. Because the frameless motor does not have an additional housing, the outer side surface of the outer ring 1 forms the outer surface of the frameless motor, and the appearance of the frameless motor can be optimized.

[0038] Please refer to Figure 6 The application also provides a frameless motor, which comprises a magnetic ring 5 and the frameless motor stator 4 described above, and the magnetic ring 5 is arranged in the inner hole 201 of the inner ring 2.

[0039] The frameless motor stator 4 in the embodiment is the same as that in the above-described embodiments, and will not be described here again. The magnetic ring 5 in the embodiment can rotate under the driving of the rotating magnetic field generated by the stator winding 6, and the magnetic ring 5 is the power output end of the frameless motor. The magnetic ring 5 in the embodiment does not have a rotating shaft, and the frameless motor is connected to the rotating shaft to be driven through the inner side wall of the magnetic ring 5, so as to drive the use object and serve as a power source of the use object.

[0040] In one embodiment, the magnetic ring 5 comprises a fixed ring and a plurality of magnetic steels distributed along the circumference of the fixed ring, and the magnetic steels are connected to the outer side of the fixed ring. The specific connection mode of the magnetic steels on the outer side of the fixed ring is not limited in the embodiment, and any form of fixation can be formed.

[0041] In the frameless motor described above, the outer ring 1 of the stator 4 is a one-piece structure, the outer side surface of the one-piece outer ring 1 has good flatness, which is beneficial to optimize the magnetic circuit and improve the performance of the frameless motor, and the one-piece outer ring 1 is simple to manufacture, which is beneficial to improve the processing efficiency and reduce the assembly cost. Because the frameless motor does not have an additional housing, the outer side surface of the outer ring 1 forms the outer surface of the frameless motor, and the appearance of the frameless motor can be optimized.

[0042] The embodiment of the present application also provides a rotating device, which comprises a fixed part, a rotating shaft to be driven, and the frameless motor as described above, the stator 4 of the frameless motor is fixed on the fixed part, and the rotating shaft to be driven is inserted into the inside of the fixed ring and fixedly connected with the fixed ring.

[0043] The frameless motor in the embodiment is the same as the above-described embodiment, and will not be described again. In some embodiments, the rotating device can have a shell, the fixed part is arranged on the shell, the stator 4 of the frameless motor is fixed on the fixed part, the magnetic ring 5 of the frameless motor is fixed with the rotating shaft to be driven in the rotating device which needs to be driven by the frameless motor, the rotating shaft to be driven can be supported on the shell of the device through a bearing, and the stator winding 6 of the frameless motor is energized to rotate the magnetic ring 5 of the frameless motor, so as to drive the rotating shaft to be driven of the rotating device to rotate, and the rotating device starts to work. The shape of the fixed part is not specifically limited in the embodiment, for example, the fixed part can be a groove structure, at least part of the groove surface of the groove structure is matched with the outer contour of the outer ring 1, and the stator 4 is fixed in the groove during assembly; or the fixed part can also be a fixed hole, and the outer ring 1 is fixed in the fixed hole to form the fixation of the stator 4; or the fixed part can also be in the form of a circular ring, and the fixed part in the form of a circular ring is fixedly connected with the end part of the stator 4 to form the fixation of the stator 4. The connection between the rotating shaft to be driven and the magnetic ring 5 is not limited in the embodiment, for example, a key connection or a glue fixing mode can be used. The rotating device in the embodiment can be applied to, but is not limited to, the fields of robots, medical treatment, machine tools, aerospace, vehicles and the like. In some application scenarios, the rotating device can also be a test device.

[0044] The rotating device described above comprises the frameless motor, the outer ring 1 of the stator 4 of the frameless motor is in an integral molding structure, the outer side surface of the integrally molded outer ring 1 is good in flatness, which is beneficial to optimizing the magnetic circuit and improving the performance of the frameless motor, the outer ring 1 in the integral molding structure is simple to manufacture, which is beneficial to improving the processing efficiency and reducing the assembly cost. Because the frameless motor does not have an additional housing, the outer side surface of the outer ring 1 forms the outer surface of the frameless motor, and the appearance of the frameless motor can be optimized.

[0045] The above application uses specific examples to describe the present application, which is only used to help understand the present application and does not limit the present application. According to the idea of the present application, those skilled in the art can make some simple deductions, deformations or substitutions.

Claims

1. A frameless motor stator, characterized by, The stator core comprises an outer ring and an inner ring fixedly arranged inside the outer ring, the inner ring has a plurality of tooth units arranged along the circumference of the inner ring, and the winding of the stator winding is arranged on the tooth units; the inner hole of the inner ring is used for assembling a magnetic ring, and the outer ring is an integral structure.

2. The frameless motor stator of claim 1, wherein, An end of the tooth unit away from the outer ring is provided with a shoulder, the shoulder protrudes from both sides of the tooth unit along the circumference of the inner ring, and the adjacent two tooth units are fixedly connected through the shoulder.

3. The frameless motor stator of claim 2, wherein, The inner ring is an integral structure.

4. The frameless motor stator of claim 3, wherein, The inner ring and the outer ring are connected in an interference fit.

5. The frameless motor stator of claim 2, wherein, The adjacent two tooth units are fixedly connected through the shoulder.

6. The frameless motor stator of claim 1, wherein, The inner ring and the outer ring are integrally formed, the teeth of the tooth unit extend towards the inner hole of the inner ring, the adjacent teeth in the inner ring form a winding slot, and an end of the winding slot away from the outer ring penetrates the inner ring and communicates with the inner hole.

7. A frameless motor stator as claimed in any one of claims 1 to 6, wherein, A plurality of insulation skeletons are arranged on the tooth units in the axial direction of the stator, and the winding of the stator winding is arranged on the insulation skeletons.

8. A frameless motor characterized by, The magnetic ring is arranged in the inner hole of the inner ring.

9. The frameless motor of claim 8, wherein, The magnetic ring comprises a fixed ring and a plurality of magnetic steels distributed along the circumference of the fixed ring, and the magnetic steels are connected to the outer side of the fixed ring.

10. A rotating device, characterized by The fixed part, the to-be-driven rotating shaft, and the frameless motor according to claim 9 are provided, the frameless motor stator is fixed on the fixed part, and the to-be-driven rotating shaft is arranged inside the fixed ring and fixedly connected with the fixed ring. The fixed part, the to-be-driven rotating shaft, and the frameless motor according to claim 9 are provided, the frameless motor stator is fixed on the fixed part, and the to-be-driven rotating shaft is arranged inside the fixed ring and fixedly connected with the fixed ring.

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