Motor

Abstract

The present invention may provide a motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed to correspond to the rotor, wherein the stator includes a stator core, an insulator coupled to the stator core, and a coil wound around the insulator, and the insulator includes an upper insulator and a lower insulator disposed to be spaced apart from each other in an axial direction, and an insulating sheet provided between the upper insulator and the lower insulator to insulate the coil and the stator core.

Description

motor

[0001] The example relates to a motor.

[0002] The motor includes a rotor and a stator. The stator may include a stator core, an insulator mounted on the stator core, and a coil wound around the insulator.

[0003] The insulator may be mounted to surround the teeth of the stator core. The axial length of the insulator may correspond to the axial length of the stator core. Therefore, if the length of the stator core varies, the insulator must also be mounted with a different length corresponding to the length of the stator core.

[0004] Even if the stator core shape is identical, if different lengths are used, a corresponding insulator must be prepared. Consequently, the manufacturing process for the insulator requires numerous processes and time.

[0005] Accordingly, the present invention aims to solve the above-mentioned problem by providing a motor including an insulator that is compatible and can be applied to stator cores having different axial lengths.

[0006] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below.

[0007] An embodiment may provide a motor including a shaft, a rotor coupled to the shaft, and a stator arranged correspondingly to the rotor, wherein the stator includes a stator core, an insulator coupled to the stator core, and a coil wound around the insulator, and wherein the insulator includes an upper insulator and a lower insulator arranged axially apart from each other, and an insulating sheet provided between the upper insulator and the lower insulator to insulate the coil and the stator core at all times.

[0008] Some of the ends of the above insulating sheet may overlap the upper insulator or the lower insulator.

[0009] The end of the above insulating sheet may be located between the stator core and the upper insulator or between the stator core and the lower insulator.

[0010] The above insulating sheet can be in contact with the inner surface of the upper insulator and the inner surface of the lower insulator.

[0011] The upper insulator or the lower insulator may include an inner surface facing the stator core, and a groove may be formed on the inner surface to which an end of the insulating sheet is joined.

[0012] The above-mentioned groove may include a first surface facing a side surface of the insulating sheet, and a second surface formed perpendicular to the first surface and facing an end surface of the insulating sheet.

[0013] The upper insulator and the lower insulator each include a coil groove in which the coil is mounted, and the groove and the coil groove can be positioned to correspond to each other based on the width direction of the insulator.

[0014] The upper insulator and the lower insulator each include an insulator body on which the coil is mounted, the insulator body includes a first side wall and a second side wall positioned opposite the first side wall, and the groove may be formed on the inner surface of the first side wall and the inner surface of the second side wall, respectively.

[0015] The above insulating sheet may include a first sheet positioned in a groove formed on the inner surface of the first side wall, and a second sheet positioned in a groove formed on the inner surface of the second side wall.

[0016] According to an embodiment, in the insulator, by connecting insulating sheets to the upper insulator and the lower insulator and implementing common use of the insulator so that the upper insulator and the lower insulator have the same axial length regardless of the axial length of the stator core, there is an advantage of simplifying the manufacturing process and reducing the manufacturing time.

[0017] Figure 1 is a drawing showing a motor according to an embodiment;

[0018] Figure 2 is a drawing showing a stator with a coil wound on an insulator mounted on a stator core.

[0019] Fig. 3 is an exploded view of the stator shown in Fig. 2;

[0020] Figure 4 is a drawing showing an upper insulator or a lower insulator;

[0021] Figure 5 is a side cross-sectional view of the upper insulator.

[0022] Figure 6 is a bottom view of the upper insulator.

[0023] Fig. 7 is a bottom perspective view of an insulator including a home;

[0024] Figure 8 is a drawing showing an insulating sheet inserted into a groove of an insulator.

[0025] Figure 9 is a side cross-sectional view showing the state in which the insulator and the insulating sheet are connected.

[0026] Fig. 10 is a side cross-sectional view showing a state in which an insulator is mounted on a stator core and an insulating sheet is fitted into a groove of the insulator.

[0027] Figure 11 is a drawing showing the assembly state of the insulator and the insulating sheet corresponding to the change in the length of the stator core, and Figure 12 is a drawing showing the process of assembling the lower insulator to the stator core.

[0028] Figure 13 is a drawing showing the process of assembling an insulating sheet to a stator core and a lower insulator.

[0029] Figure 14 is a drawing showing the process of assembling an upper insulator to a stator core with an insulating sheet installed.

[0030] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0031] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0032] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0033] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0034] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0035] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0036] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0037] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0038] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," it can include the meaning of a downward direction as well as an upward direction based on one component.

[0039] The direction parallel to the longitudinal direction (up-down direction) of the shaft is called the axial direction, the direction perpendicular to the axial direction with the shaft as the center is called the radial direction, and the direction along a circle with a radius in the radial direction with the shaft as the center is called the circumferential direction.

[0040] Figure 1 is a drawing illustrating a motor according to an embodiment.

[0041] Referring to FIG. 1, a motor according to an embodiment may include a shaft (100), a rotor (200), a stator (300), and a housing (400).

[0042] The shaft (100) can be coupled to the rotor (200). When current is supplied, the rotor (200) rotates, and the shaft (100) rotates accordingly.

[0043] The rotor (200) can be arranged corresponding to the stator (300) and can be arranged inside. The rotor (200) can include a magnet.

[0044] The stator (300) is arranged on the outside of the rotor (200). The stator (300) may include a stator core (310), an insulator (320) mounted on the stator core (310), and a coil (330). The coil (330) may be wound around the insulator (320). The insulator (320) is arranged between the coil (330) and the stator core (310), and serves to electrically insulate the stator core (310) and the coil (330) from each other.

[0045] FIG. 2 is a drawing showing a stator in which a coil (330) is wound around an insulator (320) mounted on a stator core (310), and FIG. 3 is an exploded view of the stator (300) shown in FIG. 2.

[0046] Referring to FIGS. 2 and 3, an insulator (320) may be mounted on a stator core (310). A coil (330) may be wound on the insulator (320).

[0047] The insulator (320) may include an upper insulator (320A) and a lower insulator (320B). The upper insulator (320A) may be coupled to one side of the stator core (310) in the axial direction, and the lower insulator (320B) may be coupled to the other side of the stator core (310).

[0048] Hereinafter, the upper insulator (320A) refers to an insulator (320) located in the direction in which the end of the coil (330) is drawn out after winding the coil (330) based on the axial direction of the motor, and the lower insulator (320B) may refer to an insulator (320) located on the opposite side of the upper insulator (320A) based on the axial direction of the motor.

[0049] The upper insulator (320A) can be assembled on one axial side of the stator core (310). The lower insulator (320B) can be assembled on the other axial side of the stator core (310). The upper insulator (320A) and the lower insulator (320B) can have the same shape and size. The upper insulator (320A) and the lower insulator (320B) can be manufactured using the same mold.

[0050] Meanwhile, the insulator (320) may include an insulating sheet (320C). The insulating sheet (320C) may be mounted on each of both sides of the stator core (310). The insulating sheet (320C) may include a first sheet (320Ca) and a second sheet (320Cb). The first sheet (320Ca) may be positioned facing one side of the stator core (310), and the second sheet (320Cb) may be positioned facing the other side of the stator core (310). In addition, the insulating sheet (320C) may be connected to the upper insulator (320A) and the lower insulator (320B).

[0051] The insulating sheet (320C) may have a rectangular shape corresponding to the shape of the side surface of the stator core (310). When considering the connection between the insulating sheet (320C) and the upper insulator (320A) or the connection between the insulating sheet (320C) and the lower insulator (320B), the axial length of the insulating sheet (320C) may be smaller than the axial length of the stator core (310).

[0052] These insulating sheets (320C) cover both sides of the stator core (310) that are not covered by the upper insulator (320A) and the lower insulator (320B), thereby preventing the coil (330) and the stator core (310) from coming into contact.

[0053] And the axial length of the insulating sheet (320C) can be set corresponding to the axial length of the stator core (310). When the axial length of the stator core (310) is changed, a different insulating sheet (320C) having an axial length corresponding to the changed stator core (310) can be assembled, unlike the upper insulator (320A) and the lower insulator (320B). That is, when applying the insulator (320) to various stator cores (310) having different axial lengths, the same upper insulator (320A) and lower insulator (320B) can be applied, and only the insulating sheet (320C) can be applied differently depending on the stator core (310).

[0054] Therefore, the upper insulator (320A) and the lower insulator (320B), which are manufactured in one mold regardless of the axial length of the stator core (310), can be mounted on the stator core (310).

[0055] Figure 4 is a drawing showing an upper insulator (320A) or a lower insulator (320B).

[0056] Below, since the upper insulator (320A) and the lower insulator (320B) have the same shape and size, the characteristics of the lower insulator (320B) will also be described based on the upper insulator (320A).

[0057] The upper insulator (320A) may include an insulator body (321). A coil (330) may be mounted on the insulator body (321). The insulator body (321) may include a first side wall (321a) and a second side wall (321b). The first side wall (321a) and the second side wall (321b) may be arranged to face each other. The first side wall (321a) and the second side wall (321b) may be positioned on each side of the stator core (310).

[0058] The insulator body (321) may include a coil groove (CG). The coil groove (CG) may be formed concavely on the outer surface of the insulator body (321). A plurality of coil grooves (CG) are arranged. The coil (330) may be placed in the coil groove (CG) and may begin to be wound around the insulator (320).

[0059] This upper insulator (320A) can be connected to an insulating sheet (320C). Referring to FIGS. 5 and 6 below, the features of the upper insulator (320A) for connection to the insulating sheet (320C) will be described.

[0060] Figure 5 is a side cross-sectional view of the upper insulator (320A), and Figure 6 is a bottom view of the upper insulator (320A).

[0061] Referring to FIGS. 4 and 5, the upper insulator (320A) may include a groove (G) for connection with the insulating sheet (320C). The groove (G) may be formed on the inner surface of the first side wall (321a) and the inner surface of the second side wall (321b), respectively. The groove (G) may be formed concavely on the inner surface of the first side wall (321a). And another groove (G) may be formed concavely on the inner surface of the second side wall (321b). The groove (G) may be formed long in the radial direction. This groove (G) may be connected to an end portion of the first side wall (321a). And another groove (G) may be connected to an end portion of the second side wall (321b).

[0062] The groove (G) formed in the first side wall (321a) and the groove (G) formed in the second side wall (321b) can be arranged facing each other.

[0063] As illustrated in Fig. 6, the groove (G) can be positioned to correspond to the coil groove (CG). Since the coil (330) is seated in the coil groove (CG), the groove (G) that determines the position of the insulating sheet (320C) can be aligned with the coil groove (CG) so that the coil (330) does not touch the stator core (310). To prevent the insulating sheet (320C) from moving within the groove (G), the length (L1) of the groove (G) can be set to correspond to the insulating sheet (320C). The thickness (t) of the groove (G) can be set to be at least greater than the thickness of the insulating sheet (320C).

[0064] Fig. 7 is a bottom perspective view of an insulator (320) including a home (G).

[0065] Referring to Fig. 7, the groove (G) may include a first surface (S1) and a second surface (S2). The first surface (S1) corresponds to the inner surface of the groove (G) and may be in contact with the side surface of the insulating sheet (320C). The second surface (S2) corresponds to the left or right surface of the groove (G) and may be formed perpendicular to the first surface (S1) and may be formed to face the end surface of the insulating sheet (320C). The second surface (S2) may be slightly spaced apart from or in contact with the end surface of the insulating sheet (320C) depending on the length of the insulating sheet (320C).

[0066] Fig. 8 is a drawing showing an insulating sheet (320C) inserted into a groove (G) of an insulator (320), and Fig. 9 is a side cross-sectional view showing a state in which the insulator (320) and the insulating sheet (320C) are connected.

[0067] Referring to FIGS. 8 and 9, the insulating sheet (320C) can be inserted into the groove (G) toward the end of the insulator (320). When the insulating sheet (320C) is inserted into the groove (G), the end of the insulating sheet (320C) and the first side wall (321a) of the insulator (320) or the end of the insulating sheet (320C) and the second side wall (321b) can form an overlapping area (O).

[0068] Fig. 10 is a side cross-sectional view showing a state in which an insulator (320) is mounted on a stator core (310) and an insulating sheet (320C) is fitted into a groove (G) of the insulator (320).

[0069] Referring to Fig. 10, the insulating sheet (320C) contacts the outer surface of the stator core (310). And, the end of the insulating sheet (320C) inserted into the groove (G) of the insulator (320) can be located between the stator core (310) and the insulator (320). That is, the inner surface of the end of the insulating sheet (320C) can contact the outer surface of the stator core (310), and the outer surface of the end of the insulating sheet (320C) can contact the insulator (320). Since the end of the insulating sheet (320C) is located between the stator core (310) and the insulator (320), the insulating sheet (320C) can be prevented from being separated from the insulator (320).

[0070] Fig. 11 is a drawing showing the assembly state of the insulator (320) and the insulating sheet (320C) corresponding to the change in length of the stator core (310).

[0071] The length of the insulating sheet (320C) can be varied depending on the length of the stator core (310). In this case, the upper insulator (320A) and the lower insulator (320B) can be the same, and only the insulating sheet (320C) can be replaced and applied according to the length of the stator core (310).

[0072] As illustrated in (a) of Fig. 11, when the axial length (L2) of the stator core (310) is short, an insulating sheet (320C) having a short length (L3) may be applied. As illustrated in (b) of Fig. 11, when the axial length (L4) of the stator core (310) is long, an insulating sheet (320C) having a long length (L5) may be applied. In the case of the stator core (310) illustrated in (a) of Fig. 11 and the stator core (310) illustrated in (b) of Fig. 11, the same insulator (320) may be applied to both, with only the insulating sheet (320C) being different. That is, for stator cores (310) having different axial lengths, the upper insulator (320A) and the lower insulator (320B) may be used in common.

[0073] Figure 12 is a drawing illustrating a process of assembling a lower insulator (320B) to a stator core (310).

[0074] Referring to Fig. 12, a method for manufacturing a motor according to an embodiment is as follows.

[0075] Either the upper insulator (320A) or the lower insulator (320B) can be assembled to the stator core (310). For example, as illustrated in (a) of FIG. 12, the lower insulator (320B) can be assembled by fitting it to one end of the stator core (310). As illustrated in (b) of FIG. 12, the lower insulator (320B) surrounds one end of the stator core (310).

[0076] Figure 13 is a drawing illustrating a process of assembling an insulating sheet (320C) to a stator core (310) and a lower insulator (320B).

[0077] Referring to Fig. 13, next, one end of the insulating sheet (320C) can be inserted between the stator core (310) and either the upper insulator (320A) or the lower insulator (320B). As illustrated in (a) of Fig. 13, when the lower insulator (320B) wraps around one end of the stator core (310), a space can be formed between the groove (G) and the stator core (310) into which the insulating sheet (320C) can be inserted. As illustrated in (b) of Fig. 13, one end of the insulating sheet (320C) can be inserted into this space. In this way, the first sheet (320Ca) and the second sheet (320Cb) can be inserted in one and the other directions of the stator core (310), respectively. One end of the insulating sheet (320C) can be positioned between the stator core (310) and the lower insulator (320B).

[0078] Figure 14 is a drawing showing the process of assembling an upper insulator (320A) to a stator core (310) with an insulating sheet (320C) mounted.

[0079] As illustrated in (a) of Fig. 14, while the insulating sheet (320C) is fixed by the lower insulator (320B), the upper insulator (320A) can be assembled toward the other end of the stator core (310). When the upper insulator (320A) is assembled to the stator core (310), the other end of the insulating sheet (320C) is positioned in the groove (G) formed in the upper insulator (320A). The other end of the insulating sheet (320C) can be positioned between the stator core (310) and the upper insulator (320A).

[0080] Since both ends of the insulating sheet (320C) overlap with the upper insulator (320A) and the lower insulator (320B), respectively, the insulating sheet (320C) can be prevented from being separated from the upper insulator (320A) or the lower insulator (320B).

[0081] While the aforementioned embodiments have illustrated an inner rotor motor as an example, the present invention is not limited thereto. The present invention is also applicable to outer rotor motors. Furthermore, it can be utilized in a variety of devices, including vehicles and home appliances.

Claims

1. Shaft; A rotor coupled to the above shaft; It includes a stator arranged corresponding to the rotor, The stator includes a stator core, an insulator coupled to the stator core, and a coil wound around the insulator, A motor including an upper insulator and a lower insulator that are axially spaced apart from each other, and an insulating sheet provided between the upper insulator and the lower insulator to insulate the coil and the stator core at all times.

2. In paragraph 1, A motor in which some of the ends of the above insulating sheet overlap with the upper insulator or the lower insulator.

3. In paragraph 1, A motor in which the end of the insulating sheet is located between the stator core and the upper insulator or between the stator core and the lower insulator.

4. In paragraph 1, The above insulating sheet is a motor that contacts the inner surface of the upper insulator and the inner surface of the lower insulator.

5. In paragraph 2, The upper insulator or the lower insulator includes an inner surface facing the stator core, A motor in which a groove is formed on the inner surface to which the ends of the insulating sheet are joined.

6. In paragraph 3, A motor in which the above-mentioned home includes a first surface facing a side surface of the insulating sheet, and a second surface formed perpendicular to the first surface and facing an end surface of the insulating sheet.

7. In paragraph 3, The upper insulator and the lower insulator each include a coil home in which the coil is mounted, A motor in which the groove and the coil groove are positioned correspondingly based on the width direction of the insulator.

8. In paragraph 3, The upper insulator and the lower insulator each include an insulator body on which the coil is mounted, The above insulator body includes a first side wall and a second side wall positioned opposite the first side wall, The above home is a motor formed on the inner surface of the first side wall and the inner surface of the second side wall, respectively.

9. In paragraph 3, A motor in which the insulating sheet includes a first sheet positioned in a groove formed on the inner surface of the first side wall and a second sheet positioned in a groove formed on the inner surface of the second side wall.

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