Stator assembly and claw pole type motor thereof

Abstract

The stator assembly comprises a framework, a coil wound on the surface of the framework, a claw pole piece installed at one end of the framework and a shell, the claw pole piece comprises a panel part and a plurality of first pole tooth parts arranged on the panel part, and the shell is provided with a plurality of second pole tooth parts. The first pole tooth part and the second pole tooth part are installed in the framework, the framework is sleeved with the shell, the coil is located between the wall face of the shell and the second pole tooth part, a plurality of first containing grooves used for containing the first pole tooth part respectively are formed in one end of the framework, and a plurality of second containing grooves used for containing the second pole tooth part respectively are formed in the other end of the framework. And the second accommodating grooves and the first accommodating grooves are staggered. When the first pole tooth part and the second pole tooth part are assembled, accurate assembly can be completed without considering the problems such as an assembly gap, so that the working operation steps in the assembly process are reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of claw pole motors, and more specifically, to a stator assembly and a claw pole motor thereof. Background Technology

[0002] Claw-pole stepper motors are commonly used in handheld receipt printers. Because handheld receipt printers use smaller motors, the overall structure is reduced, resulting in smaller components. Especially for the 10mm long motor stator (total length 15-16mm), due to the relatively long pole claws (outer diameter to height close to 1:1), an insulated support is typically wound with enameled wire before assembling the motor, as seen in existing technologies. Figure 1 The configuration shown includes a housing 1, claw poles 2, a coil frame 3, a magnetic core rotor 4, and a rotating shaft 5. The coil frame 3 is located inside the housing 1, the claw poles 2 are located inside the coil frame 3, the magnetic core rotor 4 is located inside the rotor 2, and the rotating shaft 5 is located at the center of the magnetic core 4.

[0003] However, since the dimensions of each part of the micro motor are already very small, each part needs to be positioned individually. The claw pole and the claw pole part of the outer shell need to be positioned and assembled, and the assembly process also needs to take into account the assembly gap. The assembly process is complicated, resulting in low assembly efficiency. Utility Model Content

[0004] To overcome the problem of low assembly efficiency of miniature claw pole motors in the prior art, this utility model provides a stator assembly and its claw pole motor, which can provide positioning for the claw machine, improve assembly efficiency and component installation accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a stator assembly, including a frame, a coil wound on the surface of the frame, a claw pole member installed at one end of the frame, and a housing. The claw pole member includes a panel portion and a plurality of first pole teeth disposed on the panel portion. The housing is provided with a plurality of second pole teeth. The first pole teeth and the second pole teeth are inserted into the frame. The housing is fitted onto the frame, and the coil is located between the wall surface of the housing and the second pole teeth. One end of the frame is provided with a plurality of first receiving grooves for accommodating the first pole teeth respectively. The other end of the frame is provided with a plurality of second receiving grooves for accommodating the second pole teeth respectively. The second receiving grooves and the first receiving grooves are staggered.

[0006] In the above technical solution, the staggered arrangement of the first and second receiving slots means that the second receiving slot is located between two adjacent first receiving slots, and the first receiving slot is also located between two adjacent second receiving slots. During stator assembly installation, the first pole teeth of the claw pole member can be inserted into the first receiving slot for positioning. After assembling the claw pole member, the coil is wound onto the frame. Then, guided by the second receiving slot, the housing is fitted onto the frame and coil, with the second pole teeth inserted into the second receiving slot. Because the first and second receiving slots are staggered and their positions are already set on the frame, the first and second pole teeth can be positioned using the first and second receiving slots during assembly without needing to adjust the assembly gap.

[0007] Preferably, the frame is provided with a positioning post at one end of the first receiving groove, and the panel is provided with a positioning groove that cooperates with the positioning post. Since the claw electrode needs to be assembled on the frame at a certain angle, the positioning post and positioning groove are used to prevent incorrect assembly in order to avoid incorrect assembly angle.

[0008] Preferably, the panel portion has a first positioning notch between each of two adjacent first pole teeth, and the outer shell has a second positioning notch between each of two adjacent second pole teeth; one end of the frame has a first positioning boss that fits against the inner surface of the first positioning notch, and the other end has a second positioning boss that fits against the inner surface of the second positioning notch. When the first positioning notch and the first positioning boss are assembled, their fit ensures a complete fit between the mounting surfaces of the panel portion and the frame; similarly, when the second positioning notch and the second positioning boss are assembled, their fit ensures a complete fit between the mounting surfaces of the shell and the frame, resulting in a neat and aesthetically pleasing appearance and preventing impurities from entering the interior.

[0009] Preferably, the end of the frame with the second receiving groove is provided with a bearing mounting groove, and the axis of the bearing mounting groove is collinear with the axis of the frame. Existing bearing mounting grooves are generally installed on end plates, but this method requires ensuring that the center of the end plate and the center of the shaft are on the same axis during assembly. This solution, however, provides a bearing mounting groove on the frame, eliminating the need to consider assembly errors of the end plate. Simply mounting the bearing in the bearing mounting groove ensures that the bearing axis is collinear with the axis of the bearing mounting groove. Furthermore, by limiting the bearing's position, the installation of the stator assembly and rotor is influenced, allowing the stator assembly to be more accurately coaxial with the rotor without considering assembly operation issues, thus improving the assembly efficiency of the motor.

[0010] Preferably, the outer surface of the skeleton is provided with a plurality of assembly positioning grooves, each of which is connected to a corresponding first receiving groove. Each first receiving groove corresponds to an assembly positioning groove. When assembling the claw electrode, the skeleton can be fixed by the assembly positioning groove and the first electrode tooth can be restricted, so that the first electrode tooth will not shift or deform within the first receiving groove during assembly.

[0011] Preferably, the frame is made of plastic.

[0012] Preferably, the skeleton and the claw electrode are integrally injection molded.

[0013] A claw-pole motor includes a rotor, a shaft connected to the rotor, a bearing mounted on the shaft, an end plate, and a stator assembly. Two stator assemblies are provided, both of which are mounted on the rotor. The bearing is inserted into the bearing mounting groove, and the end plate is connected to the housing.

[0014] The two stator assemblies are mounted on the rotor in a mirror-image arrangement at the center of the shaft, and the end plate only needs to be connected to the housing of one of the stator assemblies. Due to the improved assembly efficiency of the stator assemblies described above, the main assembly work of the motor is reduced to simply mounting the stator assemblies onto the rotor, thus increasing the assembly speed of the motor.

[0015] Preferably, the panel portion is provided with a positioning portion and a mating portion for positioning and connecting with the panel portion of another stator assembly. The rotor is actually smooth. During assembly, the two stator assemblies are first connected by assembling the positioning portion and the mating portion before being fitted onto the rotor. This can better achieve the positioning operation of the stator assembly on the rotor, avoid misalignment between the two stator assemblies during assembly, improve assembly efficiency, and increase yield.

[0016] Preferably, the positioning part and the mating part are symmetrically arranged on both sides of the panel part with respect to the center of the panel part. Due to the mirror arrangement of the stator assembly, the symmetrically arranged positioning part and mating part allow two claw pole pieces with the same structure to be directly positioned and connected. That is, two identical claw pole pieces can also achieve positioning and connection between the positioning part of one panel part and the mating part of another panel part, and only one type of claw pole piece is needed for the mating part of one panel part to mate with the positioning part of another panel part.

[0017] Compared with the existing technology, the beneficial effects are: by setting the first and second receiving grooves on the skeleton, the claw pole and the housing are provided with installation positioning, and the first and second pole teeth can be accurately assembled without considering assembly gaps and other issues during assembly, reducing the number of work operation steps in the assembly process and improving assembly efficiency. Attached Figure Description

[0018] Figure 1 It is a claw-pole motor in existing technology;

[0019] Figure 2 This is an exploded view of a stator assembly according to this utility model;

[0020] Figure 3 This is a schematic diagram of the skeleton of this utility model;

[0021] Figure 4 This is a cross-sectional view of the skeleton of this utility model;

[0022] Figure 5 This is an exploded view of a claw-pole motor according to this utility model.

[0023] In the diagram, 100-frame; 110-first receiving groove; 120-second receiving groove; 130-positioning post; 140-first positioning boss; 150-second positioning boss; 160-bearing mounting groove; 170-assembly positioning groove; 200-coil; 300-claw pole piece; 310-panel part; 311-positioning groove; 312-first positioning notch; 313-positioning part; 314-fitting part; 320-first pole tooth part; 400-outer shell; 410-second pole tooth part; 420-second positioning notch; 500-rotor; 600-shaft; 700-bearing; 800-end plate. Detailed Implementation

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0025] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0029] Example 1

[0030] like Figure 2-3 The diagram shows an embodiment 1 of a stator assembly, including a frame 100, a coil 200 wound around the surface of the frame 100, a claw pole member 300 mounted on one end of the frame 100, and a housing 400. The claw pole member 300 includes a panel portion 310 and a plurality of first pole teeth 320 disposed on the panel portion 310. The housing 400 is provided with a plurality of second pole teeth 410. The first pole teeth 320 and the second pole teeth 410 are inserted into the frame 100. The housing 400 is fitted onto the frame 100, and the coil 200 is located between the wall surface of the housing 400 and the second pole teeth 410. One end of the frame 100 is provided with a plurality of first receiving grooves 110 respectively for accommodating the first pole teeth 320, and the other end of the frame 100 is provided with a plurality of second receiving grooves 120 respectively for accommodating the second pole teeth 410. The second receiving grooves 120 and the first receiving grooves 110 are staggered.

[0031] The working principle or workflow of this embodiment is as follows: The staggered arrangement of the first receiving groove 110 and the second receiving groove 120 means that the second receiving groove 120 is located between two adjacent first receiving grooves 110, and the first receiving groove 110 is also located between two adjacent second receiving grooves 120. When installing the stator assembly, the first pole tooth 320 of the claw pole member 300 can be inserted into the first receiving groove 110 for positioning. After the claw pole member 300 is assembled, the coil 200 is wound around the frame 100. Then, guided by the second receiving groove 120, the housing is fitted onto the frame 100 and the coil 200. The second pole tooth 410 is inserted into the second receiving groove 120. Since the first receiving groove 110 and the second receiving groove 120 are staggered and their positions are already set on the frame 100, the first pole tooth 320 and the second pole tooth 410 can be positioned through the first receiving groove 110 and the second receiving groove 120 during assembly without adjusting the assembly gap.

[0032] The beneficial effects of this embodiment are as follows: by providing the first receiving groove 110 and the second receiving groove 120 on the skeleton 100, the claw pole 300 and the outer shell 400 are provided with installation positioning. The first pole tooth 320 and the second pole tooth 410 can be accurately assembled without considering assembly gaps and other issues during assembly, thereby reducing the number of work operation steps in the assembly process and improving assembly efficiency.

[0033] Example 2

[0034] like Figure 2-4 The following is an embodiment 2 of a stator assembly. Based on embodiment 1, the difference from embodiment 1 is that the frame 100, the housing 400 and the claw pole 300 are further defined.

[0035] In this embodiment, to further improve the overall assembly quality and efficiency, a positioning post 130 is provided at one end of the frame 100 located in the first receiving groove 110, and a positioning groove 311 that mates with the positioning post 130 is provided in the panel portion 310. A first positioning notch 312 is provided between each of two adjacent first tooth portions 320 in the panel portion 310, and a second positioning notch 420 is provided between each of two adjacent second tooth portions 410 in the outer shell 400. A first positioning boss 140 that fits against the inner surface of the first positioning notch 312 is provided at one end of the frame 100, and a second positioning boss 150 that fits against the inner surface of the second positioning notch 420 is provided at the other end.

[0036] Since the claw electrode 300 needs to be assembled onto the frame 100 at a certain angle, the positioning pins 130 and locating slots 311 are used to prevent incorrect assembly angles and avoid unnecessary adjustments due to incorrect assembly, thus saving time. The first locating notch 312 and the first locating boss 140 fit together during assembly, ensuring a complete fit between the panel 310 and the frame 100 and providing positioning. Similarly, the second locating notch 420 and the second locating boss 150 fit together during assembly, ensuring a complete fit between the housing and the frame 100 and providing positioning. This ensures a clean and aesthetically pleasing appearance of the stator assembly and prevents impurities from entering the interior.

[0037] Specifically, such as Figure 4 As shown, the frame 100 has a bearing mounting groove 160 at one end where the second receiving groove 120 is provided. The axis of the bearing mounting groove 160 is collinear with the axis of the frame 100. Existing bearing mounting grooves 160 are generally mounted on end plates 800. However, this method requires ensuring that the center of the end plate 800 and the center of the rotating shaft 600 are on the same axis during assembly. This solution, by providing the bearing mounting groove 160 on the frame 100, eliminates the need to consider assembly errors of the end plate 800. Simply mounting the bearing 700 on the bearing mounting groove 160 ensures that the axis of the bearing 700 is collinear with the axis of the bearing mounting groove 160. Furthermore, the limiting effect of the bearing 700 influences the installation of the stator assembly and the rotor 500, allowing the stator assembly to be more accurately coaxial with the rotor 500 without considering assembly operation issues, thus improving the motor assembly efficiency.

[0038] Furthermore, the outer surface of the skeleton 100 is provided with a plurality of assembly positioning grooves 170, each of which is connected to a corresponding first receiving groove 110. Each first receiving groove 110 corresponds to an assembly positioning groove 170. When assembling the claw pole piece 300, the skeleton 100 can be fixed by the assembly positioning grooves 170 and the first pole tooth portion 320 can be restricted, so that the first pole tooth portion 320 will not be offset or deformed within the first receiving groove 110 during assembly.

[0039] The working principle or workflow of this embodiment is as follows: When installing the stator assembly, the first pole tooth 320 of the claw pole member 300 can be inserted into the first receiving groove 110, while the positioning groove 311 is fitted onto the positioning post 130 of the frame 100. The first positioning notch 312 and the first positioning boss 140 are engaged, and positioning is achieved through the first receiving groove 110, thus completing the assembly of the claw pole member 300. Then, the coil 200 is wound around the frame 100, and then, guided by the second receiving groove 120, the housing is fitted onto the frame 100 and the coil 200. The second pole tooth 410 is inserted into the second receiving groove 120 and engaged with the second positioning notch 420 and the second positioning boss 150. Since the outer shell 400 needs to be spliced ​​with the interface connection on the frame 100, a structure such as the positioning groove 311 needs to be provided at the outer shell 400. Since the first receiving groove 110 and the second receiving groove 120 are already staggered and their positions are already set on the skeleton 100, the first pole tooth 320 and the second pole tooth 410 can be positioned through the first receiving groove 110 and the second receiving groove 120 during assembly without adjusting the assembly gap.

[0040] Example 3

[0041] A third embodiment of a stator assembly and its claw-pole motor is based on embodiment 1 or 2, but differs from embodiment 1 or 2 in that the frame 100 is made of plastic. The frame 100 and the claw pole component 300 are integrally injection molded.

[0042] The remaining technical features and working principles of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

[0043] Example 4

[0044] An embodiment of a claw pole motor includes a rotor 500, a shaft 600 connected to the rotor 500, a bearing 700 mounted on the shaft 600, an end plate 800, and a stator assembly of any of the above embodiments. Two stator assemblies are provided, both of which are mounted on the rotor 500. The bearing 700 is inserted into a bearing mounting groove 160, and the end plate 800 is connected to the housing 400.

[0045] In this embodiment, the panel portion 310 is provided with a positioning portion 313 and a mating portion 314 for positioning and connecting with another panel portion 310 of the stator assembly. The positioning portion 313 and the mating portion 314 are symmetrically arranged on both sides of the panel portion 310 with the panel portion 310 as the center. The rotor 500 is actually smooth. During assembly, the two stator assemblies are first connected by the positioning portion 313 and the mating portion 314 before being fitted onto the rotor 500. This can better achieve the positioning operation of the stator assemblies on the rotor 500, avoid misalignment between the two stator assemblies during assembly, improve assembly efficiency, and increase yield. Since the positioning part 313 and the mating part 314 are symmetrically arranged on the panel part 310, two identical claw poles 300 can also achieve positioning connection between the positioning part 313 of one panel part 310 and the mating part 314 of another panel part 310. Only one type of claw pole 300 is needed for the mating part 314 of one panel part 310 to mate with the positioning part 313 of another panel part 310. Specifically, the positioning part 313 is cylindrical, and the mating part 314 is a blind hole.

[0046] Based on any of the above embodiments of this example, due to the improved assembly efficiency of the stator assembly, the main assembly work of the motor is only to install the stator assembly on the rotor 500. At the same time, the installation of the end plate 800 does not require the alignment of the shaft 600, thus the assembly speed of the motor is improved.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A stator assembly comprising a skeleton (100), a coil (200) wound on the surface of the skeleton (100), a claw pole member (300) installed at one end of the skeleton (100), and a housing (400), the claw pole member (300) comprising a panel portion (310) and a plurality of first pole tooth portions (320) provided on the panel portion (310), the housing (400) being provided with a plurality of second pole tooth portions (410), the first pole tooth portions (320) and the second pole tooth portions (410) being fitted inside the skeleton (100), the housing (400) being fitted on the skeleton (100) with the coil (200) located between the wall surface of the housing (400) and the second pole tooth portions (410), characterized in that, One end of the skeleton (100) is provided with a plurality of first receiving grooves (110) for accommodating the first pole tooth (320), and the other end of the skeleton (100) is provided with a plurality of second receiving grooves (120) for accommodating the second pole tooth (410), and the second receiving grooves (120) and the first receiving grooves (110) are arranged alternately.

2. A stator assembly as set forth in claim 1 wherein, The frame (100) is provided with a positioning post (130) at one end of the first receiving groove (110), and the panel part (310) is provided with a positioning groove (311) that cooperates with the positioning post (130).

3. A stator assembly according to claim 1, characterized in that, The panel portion (310) is provided with a first positioning notch (312) between two adjacent first pole teeth (320), and the outer shell (400) is provided with a second positioning notch (420) between two adjacent second pole teeth (410); one end of the skeleton (100) is provided with a first positioning boss (140) that fits against the inner surface of the first positioning notch (312), and the other end is provided with a second positioning boss (150) that fits against the inner surface of the second positioning notch (420).

4. A stator assembly according to any one of claims 1-3, characterized in that, The frame (100) is provided with a bearing mounting groove (160) at one end of the second receiving groove (120), and the axis of the bearing mounting groove (160) is collinear with the axis of the frame (100).

5. A stator assembly according to claim 4, characterized in that, The outer surface of the skeleton (100) is provided with a plurality of assembly positioning grooves (170), each of the assembly positioning grooves (170) being connected to the corresponding first receiving groove (110).

6. A stator assembly according to claim 4, characterized in that, The frame (100) is made of plastic.

7. A stator assembly according to claim 6, characterized in that, The skeleton (100) and the claw electrode (300) are integrally injection molded.

8. A claw-pole motor, comprising a rotor (500), a shaft (600) connected to the rotor (500), a bearing (700) mounted on the shaft (600), and an end plate (800), characterized in that, It also includes a stator assembly as described in any one of claims 4-7, wherein two stator assemblies are provided and both are mounted on the rotor (500), the bearing (700) is inserted into the bearing mounting groove (160), and the end plate (800) is connected to the housing (400).

9. A claw-pole motor according to claim 8, characterized in that, The panel portion (310) is provided with a positioning portion (313) and a mating portion (314) for positioning and connecting with the panel portion (310) of another stator assembly.

10. A claw-pole motor according to claim 9, characterized in that, The positioning part (313) and the mating part (314) are symmetrically arranged on both sides of the panel part (310) with respect to the center of the panel part (310).

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