Stator, motor

Abstract

To provide stators and motors that simplify the manufacturing process and reduce manufacturing costs. [Solution] The stator 2 according to the present invention comprises a substantially cylindrical stator core 10, a winding 12 wound around the stator core, and an insulator 11 that insulates the stator core 10 from the winding 12. The insulator 11 comprises a base that covers the substantially cylindrical end face of the stator core 10, and a winding terminal support portion 17 that extends along the substantially cylindrical axial direction, sandwiching the base and on the opposite side from the end face, and supports the winding 12 so that the end of the winding 12 stands upright along the axial direction at a position further from the end face than the tip of the extension.

Description

Technical Field

[0001] The present invention relates to a stator and a motor.

Background Art

[0002] Conventionally, as this type of motor, a motor having a structure as disclosed in Patent Document 1 is known. The structure of the conventional motor will be described with reference to FIGS. 5(a) and 5(b). FIG. 5(a) is a cross-sectional view showing the configuration of a stator used in the conventional motor, and FIG. 5(b) is a top view showing the configuration of a substrate used in the conventional stator. As shown in FIG. 5(a), a stator winding 103 is wound around a stator core 101 via an insulator 102. Further, as shown in FIG. 5(b), a printed circuit board 104 includes a wiring 104c that connects a lead wire outside the motor and the stator winding 103. Furthermore, the printed circuit board 104 has a notch hole 104b for guiding the winding terminal 103a of the stator winding 103 to the surface on the wiring 104c side and a land 104a for soldering and fixing. As shown in FIG. 5(a), the insulator 102 is provided with a protrusion 102a at a position corresponding to the notch hole 104b. The winding terminal 103a is wound from the base to the tip of the protrusion 102a and then soldered and fixed to a land 104a provided around the notch hole 104b on the surface on the wiring 104c side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In conventional processes, it is believed that the winding terminal 103a is wrapped around the outer circumference of the projection 102a, the printed circuit board 104 is placed on top, and the projection 102a and the winding terminal 103a are passed through the notch hole 104b and soldered on the wiring 104c side. This is because if one attempts to wrap the winding terminal 103a around the outer circumference of the projection 102a after the printed circuit board 104 has been placed, the printed circuit board 104 will obstruct the wrapping of the winding terminal 103a. However, as shown in Figure 5(a), the notch hole 104b is a hole of the same size as the projection 102a when the winding terminal 103a is wrapped around it. In order to reliably guide the winding terminal 103a to the surface on the wiring 104c side, it was necessary to place the printed circuit board 104 while gripping the winding terminal 103a to prevent it from sliding down. Therefore, the present invention aims to provide a stator and motor that can simplify the manufacturing process and reduce manufacturing costs by eliminating the need to grip the winding terminals when mounting the substrate. [Means for solving the problem]

[0005] To achieve the above objective, the stator according to the present invention comprises a substantially cylindrical stator core, a winding wound around the stator core, and an insulator that insulates the stator core from the winding. The insulator comprises a base portion that covers the substantially cylindrical end face of the stator core, and a winding terminal support portion that extends along the substantially cylindrical axial direction, sandwiching the base and on the opposite side from the end face, and supports the winding so that the end of the winding stands upright along the axial direction at a position further from the end face than the tip of the extension. This achieves the intended objective. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide a stator and motor that can simplify the manufacturing process and reduce manufacturing costs compared to conventional methods. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a cross-sectional view showing the configuration of a motor according to an embodiment of the present invention. [Figure 2]Figure 2(a) is a side view showing the configuration of a stator according to an embodiment of the present invention, and Figure 2(b) is a perspective view showing the process of placing the substrate on the insulator. [Figure 3] Figure 3(a) is a perspective view showing the configuration of a stator according to an embodiment of the present invention, and Figure 3(b) is an enlarged perspective view of the winding terminal support portion according to an embodiment of the present invention. [Figure 4] Figure 4(a) is a perspective view showing the configuration of the stator according to the modified example, and Figure 4(b) is an enlarged perspective view of the winding terminal support section according to the modified example. [Figure 5] Figure 5(a) is a cross-sectional view showing the configuration of a stator used in a conventional motor, and Figure 5(b) is a top view showing the configuration of a substrate used in a conventional stator. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. Note that the following embodiments are merely examples of the present invention and do not limit the technical scope of the present invention. Furthermore, throughout all drawings, the same parts are denoted by the same reference numerals, and subsequent descriptions are omitted. In addition, details of parts not directly related to the present invention are omitted in each drawing. (Embodiment) A motor 1 according to an embodiment of the present invention will be described with reference to Figure 1. Figure 1 is a cross-sectional view showing the configuration of the motor 1. Hereinafter, the direction parallel to the rotation axis 9 in the motor 1 will be referred to as the "axial direction," the direction perpendicular to the axial direction will be referred to as the "radial direction," and the direction in which the shaft 3a, described later, rotates with the rotation axis 9 as its central axis will be referred to as the "circumferential direction." Furthermore, in the radial direction, the direction away from the rotation axis 9 will be referred to as the "radial outward direction," and the direction approaching the rotation axis 9 will be referred to as the "radial inward direction."

[0009] Motor 1 comprises a stator 2, a bearing 6, an elastic body 7, a rotor 3, and a stator base 4.

[0010] The stator 2 is fixed to the stator base 4 and fixes the position of the rotation axis 9 of the motor 1. The stator 2 comprises a stator core 10, an insulator 11, windings 12, and a circuit board 13.

[0011] The stator core 10 is formed into a substantially cylindrical shape by laminating disc-shaped electromagnetic steel sheets. A circular hole for inserting the shaft 3a is provided in the center of the stator core 10. In addition, the stator core 10 has multiple through holes along the circumferential direction for winding the winding wire 12. Thus, even if through holes are provided in addition to the center of the cylindrical shape, it is still considered substantially cylindrical. The stator core 10 is equipped with a bearing locking portion 10a.

[0012] The bearing locking portion 10a is formed as a thin plate in the axial direction and is a protrusion that extends radially inward from the inner wall of the stator core 10. The bearing locking portion 10a locks the bearing 6 and suppresses its movement in the axial direction.

[0013] The insulators 11 are placed on both axial ends of the stator core 10. By winding the windings 12 through the insulators 11, the insulators 11 serve to electrically insulate the stator core 10 from the windings 12. Details of the insulators 11 will be described later.

[0014] The winding 12 is a conductive wire primarily made of an alloy containing, for example, copper or aluminum. The winding 12 is wound around the stator core 10 via the insulator 11. The winding 12 generates an electromagnetic force to rotate the rotor 3 when energized.

[0015] The substrate 13 is formed in a plate shape. Furthermore, the substrate 13 is motorized by the mounted electronic components. The terminals of the winding 12 are electrically connected to the circuit board 13. Details of the circuit board 13 will be described later.

[0016] The bearing 6 is a member formed in a substantially cylindrical shape having an outer diameter equivalent to the inner diameter of the stator 2, and is disposed inside the stator 2. The bearings 6 of the present embodiment are provided in a pair with the bearing locking portion 10a interposed therebetween. The bearing 6 has an inner diameter equivalent to the outer diameter of the shaft 3a, and the rotor 3 is rotatably fixed to the stator 2 by inserting the shaft 3a inside the bearing 6. The bearing 6 includes an inner ring 6a and an outer ring 6b. A plurality of rolling elements are held between the outer periphery of the inner ring 6a and the inner periphery of the outer ring 6b so as to be capable of rolling.

[0017] The inner ring 6a is cylindrical with an inner diameter equivalent to the outer diameter of the shaft 3a, and is inserted into the shaft 3a on the inner peripheral side of the stator 2. The inner ring 6a rotates together with the rotor 3.

[0018] The outer ring 6b is cylindrical with an inner diameter equivalent to the inner diameter of the stator 2, and is disposed on the outer periphery of the inner ring 6a. The outer ring 6b is rotatably held on the inner peripheral side of the stator 2.

[0019] The elastic body 7 is provided on at least one surface of the bearing locking portion 10a in the axial direction. The elastic body 7 applies a load to the outer ring 6b of one of the pair of bearings 6, thereby biasing the outer ring 6b axially outward of the stator 2 with respect to the inner ring 6a. As a result, the positions of the inner ring 6a and the outer ring 6b are displaced in the axial direction. With such a configuration, the rolling elements can roll stably, noise and vibration can be suppressed, and the function of the bearing 6 can be appropriately exhibited. Also, for the other bearing 6, the outer ring 6b can be axially biased outward of the stator 2 with respect to the inner ring 6a by the reaction force via the bearing locking portion 10a. As a result, the positions of the outer ring 6b and the inner ring 6a are displaced in the axial direction as in the case of one bearing 6, and the rolling elements can roll stably.

[0020] The rotor 3 is rotatably fixed to the stator 2 via the bearing 6.When the motor 1 is driven, the rotor 3 rotates about the rotation shaft 9 as the central axis. The rotor 3 includes a shaft 3a and a magnet 3b.

[0021] The shaft 3a is formed in a cylindrical shape with an outer diameter equal to the inner diameter of the bearing 6. The shaft 3a is rotatably fixed to the stator 2 via the bearing 6. A magnet 3b is also fixed to the outer circumference of the shaft 3a. The rotation axis 9 passes through the center of the cylindrical shape of the shaft 3a.

[0022] The magnet 3b has a cylindrical shape with a hollow space inside. The magnet 3b encloses the stator 2 within the hollow space and surrounds the outer circumference of the stator 2 in an annular shape with a uniform spatial gap. In other words, the magnet 3b surrounds the stator 2. The magnet 3b provides magnetic force to the stator 2 fixed in the hollow space and also serves as the outer casing of the motor 1. The top surface of the magnet 3b is provided with a shaft through-hole 3c.

[0023] The shaft through-hole 3c is an opening for fixing the magnet 3b to the shaft 3a, and is a circular opening with the same diameter as the outer diameter of the shaft 3a. By inserting the shaft 3a into the shaft through-hole 3c, the magnet 3b is fixed to the shaft 3a. The rotating shaft 9 passes through the center of the shaft through-hole 3c.

[0024] The stator base 4 is a component that fixes the stator 2. The stator base 4 is formed, for example, in the shape of a circular plate with a certain thickness. The stator base 4 is fixed to the product on which the motor 1 is mounted (for example, a ventilation device). In this embodiment, the stator base 4 engages with the insulator 11, thereby fixing the stator 2 via the insulator 11. The stator base 4 may be formed integrally with the product on which the motor 1 is mounted.

[0025] In a motor 1 with this configuration, the rotor 3 rotates via a pair of bearings 6 in response to the electromagnetic force induced in the stator 2.

[0026] Next, the stator 2 according to an embodiment of the present invention will be described in more detail with reference to Figures 2 and 3. In the following description, the tip of the winding 12 (the end of the winding 12) will be referred to as the winding terminal 12a. Here, Figure 2(a) of Figure 2 is a side view showing the configuration of the stator 2, and Figure 2(b) is a perspective view showing the process of placing the substrate 13 on the insulator 11. Also, Figure 3(a) of Figure 3 is a perspective view of the stator 2, and Figure 3(b) is an enlarged perspective view showing the winding terminal 12a wrapped around the winding terminal support part 17, which will be described later.

[0027] In this embodiment, as shown in Figure 2(b), the substrate 13 is formed in the shape of a ring-shaped plate. Also, as shown in Figure 2(a), the substrate 13 is placed on the insulator 11. For the purposes of this explanation, the surface of the substrate 13 facing the stator core 10 will be referred to as the stator core facing surface 13c, and the surface opposite the stator core facing surface will be referred to as the back surface 13d. Electronic components are mounted on the back surface 13d side of the substrate 13. The substrate 13 is provided with through holes 13b and solder lands 13a.

[0028] The through-hole 13b is a circular hole having a diameter that allows the winding terminal 12a to be inserted. That is, the through-hole 13b is a circular hole having a diameter greater than or equal to the diameter of the winding 12. The through-hole 13b connects the stator core-facing surface 13c and the back surface 13d of the substrate 13. In Figure 2(b), two through-holes 13b are provided, but the configuration is not limited to this. There may be one through-hole 13b, or two or more. The through-hole 13b is positioned vertically above the winding terminal support portion 17, which will be described later. In this embodiment, as shown in Figure 2(b), the through-hole 13b is located on the inner circumference side of the annular plate shape of the substrate 13.

[0029] The solder land 13a is a substantially disc-shaped conductive member located on the outer circumference of the through hole 13b. In other words, the solder land 13a is provided so as to surround the through hole 13b. Furthermore, the solder land 13a is located on the back side 13d of the substrate 13. The solder land 13a plays the role of electrically connecting the winding 12 to the electronic components mounted on the substrate 13 by being soldered to the end of the winding terminal 12a.

[0030] Next, the structure of the insulator 11 will be described in more detail with reference to Figures 2 and 3. The insulator 11 comprises an insulator base 14, a substrate mounting portion 15, and a winding terminal support portion 17.

[0031] The insulator base 14 is formed in the shape of an annular plate having a planar portion perpendicular to the axial direction. The insulator base 14 is provided in contact with the axial end face of the stator core 10 and is installed so as to cover the substantially cylindrical end face of the stator core 10. In other words, the insulator base 14 is an annular plate shape having an outer diameter equivalent to that of the disc-shaped electromagnetic steel sheet that constitutes the stator core 10. Note that the "base" described in claim 1 refers to the insulator base 14.

[0032] As shown in Figure 1, the substrate mounting portion 15 is a protrusion for positioning the substrate 13 between the winding 12 and the stator base 4. The substrate mounting portion 15 is formed to protrude axially from the insulator base 14. By positioning the substrate 13 at the tip of the protrusion in the substrate mounting portion 15, it is possible to prevent the stator core-facing surface 13c of the substrate 13 from contacting the winding 12 wound around the stator core 10.

[0033] The substrate mounting portion 15 is located radially outward from the winding 12 and is provided as a substantially annular projection centered on the rotation axis 9. This configuration prevents the winding 12 from unwinding radially outward. In order to reliably prevent unwinding, it is preferable that the substrate mounting portion 15 protrudes axially such that the tip of the projection is higher than the winding 12 wound from the insulator base 14 to the stator 2.

[0034] The winding terminal support portion 17 extends along the axial direction of a substantially cylindrical shape, sandwiching the insulator base portion 14, and toward the opposite side of the stator core 10 end face, supporting the winding terminal 12a in an axially self-supporting state. In other words, the winding terminal support portion 17 extends axially from the insulator base portion 14. In this embodiment, as shown in Figure 3(b), the winding terminal support portion 17 extends axially from the insulator base portion 14 and has an L-shape with the tip of the extension protruding radially outward. The winding terminal support portion 17 is composed of a winding entanglement portion 17a, an entanglement locking portion 17b, and a winding terminal clamping portion 17c.

[0035] The winding entanglement portion 17a is an extension for entangling the winding end 12a. The winding entanglement portion 17a is The winding terminal support portion 17 is composed of an L-shaped portion that extends axially (away from the stator core 10) from the insulator base portion 14 in the shape of a rectangular prism rod. The winding entanglement portion 17a maintains the tension of the winding 12 and prevents the winding 12 from deflecting by winding terminals 12a around the outer circumference of the winding entanglement portion 17a. It is preferable that the winding entanglement portion 17a extends to the same height as the substrate mounting portion 15. In other words, it is preferable that the winding entanglement portion 17a is extended so that the tip of the protrusion of the substrate mounting portion 15 and the tip of the extension of the winding entanglement portion 17a are located on the same plane. Since the tip of the extension of the winding entanglement portion 17a and the tip of the extension of the substrate mounting portion 15 are at the same height, the substrate 13 can be supported by both the winding entanglement portion 17a and the substrate mounting portion 15, making it more stable than when the substrate 13 is supported only by the substrate mounting portion 15.

[0036] In Figure 3(b), the winding entanglement portion 17a is a rectangular rod shape, but it is not limited to this shape. For example, the winding entanglement portion 17a may be formed in the shape of a cylindrical rod. If it is a cylindrical rod shape, it is easier to wrap the winding end 12a around it along its curvature. In any case, any shape is acceptable as long as the winding end 12a can be wrapped around the winding entanglement portion 17a.

[0037] The entanglement locking portion 17b constitutes the L-shaped part of the winding terminal support portion 17 that protrudes radially outward from the tip of the protrusion of the winding entanglement portion 17a. The entanglement locking portion 17b prevents the winding 12, which is entangled in the winding entanglement portion 17a, from unraveling from the tip of the protrusion of the winding entanglement portion 17a. It is also preferable that the entanglement locking portion 17b protrudes parallel to the insulator base portion 14. By having the entanglement locking portion 17b protrude parallel to the insulator base portion 14, the contact area between the winding terminal support portion 17 and the substrate 13 is increased. With this configuration, the substrate 13 can be stably placed on the winding terminal support portion 17 with the stator core opposing surface 13c and the insulator base portion 14 parallel.

[0038] Incidentally, as shown in Figures 2(a) and 3(a), the insulator 11 further includes a processing space 18, which is a space for axially withdrawing the mold used to process the insulator 11. The processing space 18 is formed in the shape of a groove along the axial direction. In other words, the processing space 18 is a groove-shaped space formed in the opposite direction to the direction in which the winding entanglement portion 17a protrudes. As shown in Figure 3(b), the processing space 18 is located radially outward from the winding entanglement portion 17a.

[0039] Here, as shown in Figure 3(b), the locking portion 17b protrudes radially outward. In other words, the locking portion 17b, which protrudes radially outward from the winding locking portion 17a, and the processing space 18, which is formed in the shape of a groove along the axial direction radially outward from the winding locking portion 17a, are located on a straight line in the axial direction. With such an arrangement, in a mold of the type that is pulled out in the axial direction... This makes processing easier and allows for simpler mold shapes during mass production.

[0040] The winding terminal clamping portion 17c is a space that clamps the winding terminal 12a to allow the winding terminal 12a to stand upright along the axial direction, and is provided in a slit shape along the axial direction. As shown in Figure 3(b), in this embodiment, the winding terminal clamping portion 17c is formed in a V shape at the tip of the projection of the locking portion 17b. Here, a V shape means that the slit-shaped space gradually narrows from the tip of the projection of the locking portion 17b towards the base of the projection. Note that even if the slit is U-shaped with a rounded base to match the shape of the winding terminal 12a, as shown in Figure 3(b), it is still considered V-shaped if the slit-shaped space gradually narrows from the tip of the projection towards the base of the projection.

[0041] In this embodiment, the winding terminal clamping portion 17c has a shape in which the space is wider than the wire diameter of the winding terminal 12a at the tip of the protrusion of the entanglement locking portion 17b, gradually narrowing towards the base of the protrusion, and narrowing at the base of the protrusion to a space narrower than the wire diameter of the winding 12. With this configuration, the winding terminal 12a can be easily press-fitted by pressing it against the winding terminal clamping portion 17c. In other words, it becomes easy to clamp the winding terminal 12a in the winding terminal clamping portion 17c, and it becomes easy to make the winding terminal 12a self-supporting in the axial direction. The winding terminal 12a is self-supporting in the axial direction such that its tip is located axially further away from the insulator base 14 than the tip of the protrusion of the winding terminal support portion 17. More specifically, the tip of the winding terminal 12a is located axially further away from the tip of the protrusion of the winding terminal support portion 17 by a length greater than or equal to the thickness of the substrate 13. With this configuration, the tip of the winding terminal 12a can be reliably inserted through the through hole 13b to the back side 13d. Therefore, the winding terminal 12a can be easily soldered to the back side 13d.

[0042] In conventional structures such as that described in Patent Document 1, the winding end 103a was wound around the projection 102a and passed through the notch hole 104b, as shown in Figure 5(a). In this configuration, when passing through the notch hole 104b, it was necessary to hold the winding end 103a to prevent it from getting caught on the edge of the notch hole 104b and slipping off the projection 102a, while placing the printed circuit board 104 on top.

[0043] In this embodiment, as shown in Figure 2(b), the winding terminal 12a is held by the winding terminal clamping portion 17c, so that its tip is positioned axially away from the tip of the protrusion of the winding terminal support portion 17 by the thickness of the substrate 13, allowing it to stand independently along the axial direction. In other words, the state in which the tip of the winding terminal 12a is positioned above the tip of the protrusion of the winding terminal support portion 17 is maintained. Furthermore, the through hole 13b provided in the substrate 13 is a circular hole with a diameter that allows the winding terminal 12a to pass through. Thus, unlike conventional designs, since only the winding terminal 12a passes through the through hole 13b, there is no need to grip the winding terminal 12a when placing the substrate 13, simplifying the manufacturing process and reducing manufacturing costs.

[0044] Up to this point, we have described a configuration in which the entanglement locking portion 17b protrudes radially outward as an example, but this does not limit the direction of protrusion of the entanglement locking portion 17b. For example, the entanglement locking portion 17b may also be configured to protrude radially inward or circumferentially. In particular, if the entanglement locking portion 17b is configured to protrude circumferentially and the winding terminal clamping portion 17c is located at the tip of the protrusion of the entanglement locking portion 17b, the tip of the entanglement locking portion 17b is closer to the position of the winding 12 wound around the stator core 10 compared to the case in which the entanglement locking portion 17b protrudes radially outward, so the jumper wire of the winding terminal 12a can be shortened.

[0045] Furthermore, if the winding terminal 12a is not wrapped around the winding entanglement portion 17a, the entanglement locking portion 17b may be omitted, and the winding terminal support portion 17 may be formed in an I-shape instead of an L-shape. In other words, the winding terminal support portion 17 may be formed using only the winding entanglement portion 17a and the winding terminal clamping portion 17c. When the wire end support portion 17 is I-shaped, the winding end clamping portion 17c is provided as a slit along the axial direction on the side surface of the rectangular rod-shaped portion of the winding entanglement portion 17a. When the winding end clamping portion 17c is provided on the winding entanglement portion 17a, it is preferable to provide the slit on the radially outer surface of the rectangular rod-shaped portion. Even with this configuration, by press-fitting the winding end 12a into the winding end clamping portion 17c, it is possible to make the tip of the winding end 12a stand upright in the axial direction above the tip of the winding entanglement portion 17a.

[0046] Next, a modified example of this embodiment will be described with reference to Figure 4. In Figure 4, Figure 4(a) is a perspective view of the modified stator 2, and Figure 4(b) is an enlarged view showing a modified winding terminal support portion 17. The shape of the winding terminal clamping portion 17c differs between Figure 3 and Figure 4, but they are identical in other respects. The explanation of the parts common to Figure 3 will be omitted.

[0047] In Figure 4(b), the winding end clamping portion 17c has the widest spacing of slits at the tip of the protrusion of the entanglement locking portion 17b, and the spacing of the slits gradually narrows, which is consistent with the configuration in Figure 3(b). However, the shape of the slits at the base differs from the configuration in Figure 3(b).

[0048] In Figure 4(b), the winding terminal clamping portion 17c is initially formed as a slit where the tip of the protrusion of the entanglement locking portion 17b is wider than the diameter of the winding 12, and the space gradually narrows towards the base of the protrusion of the entanglement locking portion 17b. After the slit spacing becomes narrower than the diameter of the winding 12, the slit spacing gradually widens again as the slit approaches the base of the protrusion, the opposite to Figure 3(b), and finally, at the point closest to the base of the protrusion, a circular hole with a diameter greater than or equal to the diameter of the winding 12 is provided (see the circular hole 17d in Figure 4(b)). In other words, in the modified example, the winding terminal clamping portion 17c is provided with a circular hole 17d, which is a through hole with a diameter greater than or equal to the diameter of the winding 12, at the base end where the slit spacing is narrowest in the V-shaped slit of Figure 3(b). By pushing the winding terminal 12a into the circular hole 17d, the winding terminal 12a becomes less likely to come off the winding terminal clamping portion 17c, thus enabling stable retention of the winding terminal 12a. In Figure 4(b), as an example, the spacing of the slits in the winding terminal clamping portion 17c is wider than the wire diameter of the winding 12 at the tip of the protrusion of the locking portion 17b, but the configuration is not limited to this. For example, the spacing of the slits may be narrower than the wire diameter of the winding 12 at the tip of the protrusion of the locking portion 17b, and the spacing of the slits may gradually widen from there. Even with such a configuration, by press-fitting the winding terminal 12a into the winding terminal clamping portion 17c, a configuration is achieved where the slits narrower than the wire diameter of the winding 12 are located radially outward, making it less likely for the winding terminal 12a to come off even if force is applied radially outward.

[0049] Even in this modified structure, the winding terminal 12a stands upright along the axial direction such that the tip of the winding terminal 12a is located at a distance in the axial direction greater than the thickness of the substrate 13 than the tip of the protrusion of the winding terminal support portion 17. In other words, the state in which the tip of the winding terminal 12a is located above the tip of the protrusion of the winding terminal support portion 17 is maintained. Furthermore, in this modified structure, unlike in Figure 3(b), the slit spacing becomes narrower than the wire diameter of the winding 12, and then gradually widens as it approaches the base side of the protrusion of the locking portion 17b. With this configuration, even if a radially outward force is applied to the winding terminal 12a by pushing it into the circular hole 17d, the winding terminal 12a will catch on the portion narrowed to the wire diameter of the winding 12, making it difficult for the winding terminal 12a to come off the winding terminal clamping portion 17c. (Summary of the invention) The stator 2 according to the present invention comprises a substantially cylindrical stator core 10, a winding 12 wound around the stator core 10, and an insulator 11 that insulates the stator core 10 from the winding 12. The insulator 11 comprises a base portion (insulator base portion 14) that covers the substantially cylindrical end face of the stator core 10, and a winding terminal support portion 17 that extends along the substantially cylindrical axial direction, sandwiching the base and on the opposite side from the end face, and supports the winding 12 such that the end of the winding 12 stands upright along the axial direction at a position further from the end face than the tip of the extension.

[0050] With this configuration, the slippage of the ends of the windings 12 can be suppressed without gripping the windings 12 when placing the substrate 13, thus simplifying the manufacturing process and reducing manufacturing costs.

[0051] Furthermore, the winding terminal support portion 17 may be configured to include a slit-shaped winding terminal clamping portion 17c that clamps and fixes the terminal of the winding 12.

[0052] With this configuration, press-fitting the winding 12 makes it easier for the ends of the winding 12 to maintain an upright position along the axial direction.

[0053] Furthermore, the winding terminal support portion 17 includes a winding entanglement portion 17a that extends in a rod shape from the base to the opposite end face, sandwiching the base, for entangling the winding 12, and a entanglement locking portion 17b that protrudes radially in a substantially cylindrical shape from the tip of the extension. The winding terminal clamping portion 17c may be configured to be located at the tip of the protrusion of the entanglement locking portion 17b.

[0054] With this configuration, the winding 12 is wrapped around the winding entanglement portion 17a, thereby suppressing the deflection of the jumper wires of the winding 12. Furthermore, the entanglement locking portion 17b prevents the winding 12, which is wrapped around the winding entanglement portion 17a, from coming loose in the axial direction. In addition, the radial protrusion of the entanglement locking portion 17b facilitates processing with molds that are designed for axial extraction.

[0055] Furthermore, the winding terminal support portion 17 may be configured to include a winding entanglement portion 17a that extends in a rod shape from the base to the opposite end face across the base and wraps around the winding 12, and a winding locking portion 17b that protrudes circumferentially in a substantially cylindrical shape from the tip of the extension, with the winding terminal clamping portion 17c located at the tip of the protrusion of the winding locking portion 17b.

[0056] As the entanglement locking portion 17b protrudes in the circumferential direction, the distance between the winding 12 wound around the stator core 10 and the tip of the protrusion of the entanglement locking portion 17b becomes shorter, thus shortening the length of the connecting wires of the winding 12 when the winding 12 is pressed into the winding end clamping portion 17c.

[0057] Furthermore, the winding end clamping portion 17c may be formed as a V-shaped groove in which the slit-like space gradually narrows from the tip of the protrusion of the entanglement locking portion 17b towards the base of the protrusion of the entanglement locking portion 17b.

[0058] This configuration makes it easier to press-fit the winding 12 into the winding end clamping portion 17c.

[0059] Alternatively, a motor equipped with the stator described above may be constructed. By adopting a stator that can reduce manufacturing costs, the manufacturing cost of the motor can also be reduced. [Industrial applicability]

[0060] The stator and motor of the present invention are useful for use in ventilation systems and the like. [Explanation of symbols]

[0061] 1 motor 2 staters 3 rotors 3a shaft 3b Magnet 3c shaft through hole 4 Stator Base 6 bearings 6a Inner ring 6b Outer ring 7 Elastic body 9 Rotation axis 10 Stator Cores 10a Bearing locking part 11 Insulators 12 windings 12a Winding terminal 13 circuit boards 13a Solder Land 13b Through hole 13c stator core opposing surface 13d back 14 Insulator base 15. Substrate mounting section 17 Winding terminal support section 17a Winding entanglement section 17b Binding locking part 17c Winding terminal clamping part 17d circular hole 18 Processing space 101 Stator Core 102 Insulators 102a protrusion 103 Stator winding 103a Winding terminal 104 Printed circuit board 104a Land 104b Notch 104c wiring

Claims

1. A stator comprising a substantially cylindrical stator core, windings wound around the stator core, and an insulator that insulates the stator core from the windings, The aforementioned insulator is The base portion covering the substantially cylindrical end face of the stator core, A stator comprising: a winding terminal support portion that extends along the axial direction of the substantially cylindrical shape, sandwiching the base, toward the opposite side of the end face, and supports the winding such that the winding terminal is self-supporting along the axial direction at a position further from the end face than the tip of the extension.

2. The winding terminal support portion is, The stator according to claim 1, further comprising a slit-shaped winding end clamping portion for clamping and fixing the end of the winding.

3. The winding terminal support portion is, A winding-winding portion extends in a rod shape from the base, sandwiching the base and on the opposite side of the end face, for winding the winding, It comprises a substantially cylindrical locking portion that protrudes radially from the tip of the extension, The winding end clamping portion is, The stator according to claim 2, located at the tip of the protrusion of the aforementioned locking portion.

4. The winding terminal support portion is, A winding-winding portion extends in a rod shape from the base, sandwiching the base and on the opposite side of the end face, for winding the winding, It comprises a substantially cylindrical circumferentially protruding locking portion from the tip of the extension, The winding end clamping portion is, The stator according to claim 2, located at the tip of the protrusion of the aforementioned locking portion.

5. The winding end clamping portion is, The stator according to claim 3 or 4, wherein the slit-shaped space is formed as a V-shaped groove that gradually narrows from the tip of the protrusion of the locking portion toward the base of the protrusion of the locking portion.

6. The winding end clamping portion is, The stator according to claim 5, wherein the root end of the V-shaped grooves, where the spacing is narrowest, is provided with a circular hole having a diameter greater than or equal to the diameter of the winding wire.

7. A motor comprising the stator described in claim 1.

Images