Electric motor

Abstract

The electric motor includes: an iron core (2) formed in an annular shape; a winding (4) wound around the iron core (2); an insulating member (3) that insulates between the iron core (2) and the winding (4); and a circuit board set (8) having a lead wire (10) and a lead wire fixing member (12). A stator, an electrode, and a blowing device are provided, wherein the insulating member (3) has a fixing member engaging portion (13) that engages with the lead wire fixing member (12) protruding to the outer peripheral side of the annular shape, and the lead wire fixing member (12) has a tapered engaging portion (40) that engages with the fixing member engaging portion (13) of the insulating member (3).

Description

Technical Field

[0001] The present invention relates to an electric motor. Background Art

[0002] Currently, there is known an electric motor including: a stator composed of a winding and lead wires led out from the winding; a housing for housing the stator; a lead wire insertion hole provided in the housing; and a lead wire fixing member provided in a gap between the insertion hole and the lead wire.

[0003] Next, with reference to Figure 12 its structure will be described.

[0004] As Figure 12 shown, the stator 111 includes an iron core 112, a winding 113, lead wires 114 led out from the above-mentioned winding, a lead wire fixing member 115 through which the above-mentioned lead wires are inserted, and a relay connector 116 mounted on the terminal.

[0005] The housing 117 has a lead wire fixing member insertion hole 118 with which the lead wire fixing member 115 engages.

[0006] When housing the stator 111 in the housing 117, by inserting the lead wire 114 connected to the relay connector 116 into the lead wire fixing member insertion hole 118 and engaging the lead wire fixing member 115 with the lead wire fixing member insertion hole 118, the airtightness inside the housing can be improved, and an increase in resistance to dust and moisture is expected.

[0007] Prior Art Documents

[0008] Patent Documents

[0009] Patent Document 1: Japanese Utility Model Laid-Open No. 63-93752 Summary of the Invention

[0010] In such a conventional structure in which an insertion hole is provided in the lead wire fixing member and the housing, when mounting a relay component such as a connector at the front end of the lead wire, in the case where the relay component is larger than the insertion hole, it is necessary to first insert the lead wire and then mount the relay component.

[0011] In addition, in this structure, it is difficult to uniquely determine the position of the lead wire fixing member through which the lead wire is inserted on the lead wire, and an insertion hole is also provided on the housing side. Due to such a structure, assembly by an operator is required, and there are problems in terms of workability.

[0012] Therefore, an object of the present invention is to provide an electric motor that can maintain resistance to dust and moisture regardless of the specifications of the front end of the lead wire when housing the stator in the housing, and for which automation of assembly can be expected.

[0013] To achieve the above object, the present invention provides a motor, which includes: a stator; a circuit board disposed on one axial end side of the stator; a lead wire led out from the circuit board; a bottomed cylindrical housing that holds the stator in an internal space from the one end side; a notch portion provided on a side surface of the housing and opening from a top surface toward a bottom surface; and a lead wire fixing member that holds the lead wire and fixes the lead wire to the notch portion. By adopting such a structure, the desired object is achieved.

[0014] According to the present invention, when the stator is housed in the housing, regardless of the specifications of the front end of the lead wire, the resistance to dust and moisture (durability) can be maintained, and automation of assembly can be expected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded perspective view of the motor according to Embodiment 1 of the present invention.

[0016] Figure 2 is a top view of the stator according to Embodiment 1 of the present invention.

[0017] Figure 3 is a partial perspective view of the insulating member according to Embodiment 1 of the present invention.

[0018] Figure 4 is a top view of the insulating member and the circuit board according to Embodiment 1 of the present invention.

[0019] Figure 5 is a perspective view of the lead wire fixing member according to Embodiment 1 of the present invention.

[0020] Figure 6 is a side sectional view of the lead wire fixing member according to Embodiment 1 of the present invention.

[0021] Figure 7 is a bottom view of the lead wire fixing member according to Embodiment 1 of the present invention.

[0022] Figure 8 is a perspective view of the engagement state of the circuit board group and the lead wire fixing member according to Embodiment 1 of the present invention.

[0023] Figure 9 is an exploded perspective view of the circuit board and the lead wire fixing member according to Embodiment 1 of the present invention.

[0024] Figure 10 is an exploded perspective view of the motor according to Embodiment 1 of the present invention.

[0025] Figure 11 is a side sectional view of the lead wire fixing member according to Embodiment 2 of the present invention.

[0026] Figure 12It is a diagram that simplifies and represents the state of the winding of the prior art. Detailed Embodiment

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples in which the present invention is embodied and do not limit the technical scope of the present invention. In all the drawings, the same parts are denoted by the same reference numerals, and repeated (second and subsequent) descriptions are omitted. Further, in each drawing, the detailed descriptions of the parts not directly related to the present invention are simplified or omitted.

[0028] (Embodiment 1)

[0029] A first embodiment of the present invention will be described with reference to the drawings.

[0030] First, Figure 1 the motor 6 of the present embodiment will be described. For ease of understanding and explanation, Figure 1 it is an exploded perspective view of the motor 6 with the rotor removed. The motor 6 includes a stator 1, housings 16a, 16b, and a rotor (not shown).

[0031] The stator 1 has a hollow cylindrical shape, and a rotor is provided in the hollow space. The stator 1 causes the rotor to rotate by being energized, and rotates and drives a rotating shaft provided on the rotor and extending from the housing 16b to the outside, thereby functioning as a motor. The detailed structure of the stator 1 will be described later.

[0032] The inner diameter of the housing 16a is substantially the same as the outer diameter of the iron core 2 provided in the stator 1. The housing 16a is a bottomed cylindrical shape that holds the stator 1 in its internal space, and has a U-shaped notch 17 on the side surface of the housing. The notch 17 is provided on the side surface of the housing 16a from the top surface opening toward the bottom surface and opens on the top surface opening side. Figure 2 ) engages, where the notch 17 is provided on the side surface of the housing 16a from the top surface opening toward the bottom surface and opens on the top surface opening side.

[0033] The housing 16b is a bottomed cylindrical shape that holds the stator 1 in its internal space, has an inner diameter substantially the same as the outer diameter of the iron core 2, and is concentrically fitted with the stator 1 and the housing 16a. The housing 16b does not have the notch 17 and has a through-hole in the center of the bottom surface through which the rotating shaft passes. This is different from the housing 16a, and except for this, it has substantially the same shape as the housing 16a. However, a through-hole may also be formed on the housing 16a side.

[0034] Both the housing 16a and the housing 16b have flanges 34 provided to extend from the top surface opening toward the outer periphery.

[0035] The flange 34 is provided over the entire circumference of the housing 16a except for the notch portion 17. Further, the flange 34 is provided over the entire circumference of the housing 16b. The flange 34 has a through-hole 41 common to the housing 16a and the housing 16b, and by aligning the through-holes 41 with each other, a closed housing is formed.

[0036] Next, the structure of the stator 1 will be described with reference to Figure 2 FIG. Figure 2 is a plan view of the stator 1.

[0037] The stator 1 includes a stator core, i.e., a core 2, an insulating member 3, a winding 4, a terminal connection portion 5, and a circuit board group 8.

[0038] In the core 2, a yoke portion 7 and tooth portions (not shown) protruding inward from the yoke portion 7 are integrally formed. The core 2 is integrally formed in an annular shape or formed in an annular shape by a plurality of divided cores.

[0039] The insulating member 3 has a structure that covers the core 2. By winding wires mainly made of copper or aluminum alloy of the winding 4 around a plurality of tooth portions with the insulating member 3 interposed therebetween, the insulating member 3 functions to electrically insulate the core 2 from the winding 4. The insulating member 3 has an annular shape corresponding to the divided core in the same manner as the core 2. The insulating member 3 includes a T-shaped fixing member engaging portion 13 protruding outward and protrusions 14 (protrusion 14a, protrusion 14b) for circuit board positioning (see Figure 3 ). The tapered engaging portion 40 included in the lead wire fixing member 12 can engage with the fixing member engaging portion 13. Details of the insulating member 3 will be described later.

[0040] The winding 4 is a wire wound around the core 2 including the insulating member 3, and the winding specifications vary according to the required specifications.

[0041] The terminal connection portion 5 is a conductive pin erected on the insulating member 3 and arranged parallel to the rotation axis. The terminal connection portion 5 is connected to the end of the winding 4 wound around the core 2 and is also connected to the electrical contact of the circuit board 9, thereby conducting the winding 4 and the lead wire 10.

[0042] The circuit board group 8 includes a circuit board 9, a lead wire 10 connected to the circuit board 9, and a lead wire fixing member 12 through which the lead wire 10 is inserted. Details will be described later.

[0043] The circuit board 9 connects the external components such as an inverter circuit to the winding 4 by connecting a plurality of electrical contacts. The circuit board 9 has a shape that outlines a part of a hollow circle with a central angle of approximately 160 degrees, that is, a partial doughnut shape (the shape of the circuit board 9 is such that a part of a hollow circle with a central angle of approximately 160 degrees forms the outline of the circuit board 9). The circuit board 9 is concentric with the central axis 19 of the iron core 2, and the circuit board 9 is disposed at a position at a specified distance from the central axis 19 in a plane perpendicular to the central axis 19 in the direction of the iron core 2. The circuit board 9 is placed and fixed on the outer peripheral part of the top surface, which is the end part on the top surface side of the insulating member 3, and the lead-out wire 10 is connected to the top surface of the circuit board 9, that is, the surface opposite to the iron core 2. The circuit board 9 has notches 15a and 15b for engaging with the insulating member 3, and the details will be described later. Figure 4 as shown in the notches 15a and 15b shown in Figure 4 , and the details will be described later.

[0044] The lead-out wire 10 is composed of a plurality of electric wires covered with an insulating covering on the wire. In order to supply input power to the circuit board 9, according to the circuit board design, the end of the lead-out wire 10 is connected to the electrical contacts of the circuit board 9. The number and diameter of the lead-out wires 10 vary according to the specifications of the motor, and the protective tubes 11 for protecting the wires and insulating coatings that make up the lead-out wires 10 can also be appropriately selected according to the required specifications.

[0045] As Figure 5 shown in the perspective view in Figure 6 and the side cross-sectional view in

[0046] Next, referring to Figure 3 the details of the insulating member 3 will be described. Figure 3 is a partial perspective view of the insulating member 3.

[0047] The insulating member 3 has a fixing member engaging portion 13 on the top surface (or bottom surface) of the insulating member 3, which is a plane perpendicular to the central axis 19 near the end portion in the axial direction of the insulating member 3. The top surface and the bottom surface of the insulating member 3 have a hollow doughnut shape, and on the outer peripheral side end portion of the doughnut shape, there is an outer diameter side bulging portion end surface 24 that further protrudes axially from the top surface, and on the inner peripheral side end portion, there is an inner diameter side bulging portion end surface 25 that further protrudes axially from the top surface.

[0048] The engaging portion 13 of the fixing member bulges outward toward the yoke portion 7, starting from the outermost circumference of the annular shape of the insulating member 3, i.e., the outer diameter portion 20 of the insulating member. The engaging portion 13 of the fixing member has a T-shape in a plan view. The head of the T-shape, which serves as the limiting portion 21, is located on the outer peripheral side of the engaging portion 13 of the fixing member. The legs of the T-shape, which serve as the root portion 22, are connected to the outer diameter portion 20 of the insulating member and project outward from the insulating member 3. The limiting portion 21 projects outward on both sides in the tangential direction of the ring shape of the iron core 2 (i.e., the tangential direction of the annular iron core 2) at the outer peripheral end of the root portion 22. Due to the projection of the limiting portion 21, the limiting portion 21 and the root portion 22 form a constricted structure of the engaging portion 13 of the fixing member. The root portion 22 is preferably configured such that the width in the tangential direction is smaller than the diameter of the lead wire 10. The engaging portion 13 of the fixing member has a wiring plane portion 23, which has a sufficient thickness in the axial direction of the insulating member 3 and contacts the lead wire 10.

[0049] On the end face 24 of the bulging portion on the outer diameter side of the inner peripheral side of the engaging portion 13 of the fixing member, the protruding portion 14a projects in the axial direction. On the end face 25 of the bulging portion on the inner diameter side of the circuit board 9 disposed on the top surface, the protruding portion 14b projects in the axial direction. The protruding portion 14 (the protruding portion 14a and the protruding portion 14b) functions to hold the circuit board 9 and stabilize the position of the circuit board 9 in the radial and circumferential directions when the circuit board 9 is disposed on the insulating member 3. In the present embodiment, as an example, the protruding portion 14a is disposed on the end face 24 of the bulging portion on the outer diameter side with a width (interval) wider than the root portion 22 in the circumferential direction of the engaging portion 13 of the fixing member. In addition, the protruding portion 14b is formed on the end face 25 of the bulging portion on the inner diameter side at positions spaced 45° on both sides in the circumferential direction with the root portion 22 as the center.

[0050] Next, with reference to Figure 4 the structural details of the circuit board 9 and the insulating member 3 will be described. Figure 4 is a plan view of the circuit board 9 and the insulating member 3.

[0051] The circuit board 9 has notches 15, i.e., notches 15a and 15b, that are recessed from the inner diameter and outer diameter of the partially donut shape toward the inside of the circuit board 9. The positions and sizes of the respective notches 15 correspond to the protruding portions 14a and 14b of the insulating member 3 according to their purposes. That is, when the circuit board 9 is placed, the notches 15a and 15b of the circuit board 9 are respectively engaged with the protruding portions 14a and 14b of the insulating member 3, thereby determining the radial and circumferential positions. In addition, the axial position is determined by the contact of the circuit board 9 with the end face 24 of the bulging portion on the outer diameter side and the end face 25 of the bulging portion on the inner diameter side. In this state, the engaging portion 13 of the fixing member projects to a position more peripheral than the outer periphery of the circuit board 9.

[0052] In addition, the circuit board 9 has a bulging portion 26 near the notch 15, and the bulging portion 26 is used to engage with the circuit board holding rib 37 (refer to Figure 5 , Figure 6 ) of the lead fixing member 12.

[0053] The bulging portion 26 forms the notch 15 by protruding outward in the circumferential direction near the outer circumference of the circuit board 9. The bulging portion 26 has sides A48 and B49 on both circumferential sides. Sides A48 and B49 are not parallel and are arranged to be wider on the outside and narrower on the inside (i.e., expanding outward) when looking down at the bulging portion 26. That is, when looking down, the bulging portion 26 has a substantially trapezoidal shape with the upper base on the inner circumferential side and the lower base on the outer circumferential side. Thereby, it is possible to strongly suppress the radial movement when the circuit board 9 engages with the lead fixing member 12 and has strong resistance to the extraction of the lead 10.

[0054] Next, refer to Figure 5 , Figure 6 , Figure 7 to describe the details of the lead fixing member 12. Figure 5 is a perspective view of the lead fixing member 12, Figure 6 is Figure 5 a sectional view taken along line A-A of the lead fixing member 12, Figure 7 is a bottom view of the lead fixing member 12 ( Figure 6 ).

[0055] The lead fixing member 12 has an insertion portion 43 through which the lead 10 is inserted and a reduced engagement portion 40 for engaging with the circuit board 9 and the insulating member 3.

[0056] The insertion portion 43 is a hole that penetrates from the inner circumferential side end to the outer circumferential side end of the lead fixing member 12. The insertion portion 43 is a hollow cylindrical shape, and the lead 10 is inserted into the internal space of the insertion portion 43. The insertion portion 43 is composed of an insertion hole 27 and an insertion hole extension portion 44.

[0057] The insertion hole 27 has an outer peripheral portion 29, an inner peripheral portion 31, and a connecting portion 30. In other words, the range of the insertion portion 43 from the outer peripheral portion 29 through the connecting portion 30 to the inner peripheral portion 31 corresponds to the insertion hole 27.

[0058] The outer peripheral portion 29 further protrudes outward from the outer peripheral surface of the insertion hole 27. The outer peripheral portion 29 has a plate-like arch shape in the thickness direction, and the insertion hole 27 penetrates near the curved portion (bending portion) of the arch shape. The arch shape is one size larger than the U-shaped notch portion 17 provided in the housing 16a, that is, it can cover the entire notch portion 17. The outer peripheral portion 29 has a covering portion 33 and a flange contact surface 35.

[0059] The covering portion 33 corresponds to the lower rectangular portion of an arch shape. When the lead fixing member 12 is inserted into the notch portion 17, the covering portion 33 is extendedly provided in the same circular shape as the iron core 2, that is, it is aligned with the iron core 2 in the radial direction. In other words, the inner peripheral surface of the covering portion 33 faces the iron core 2, and when the housing 16a and the housing 16b are engaged, the inner peripheral surface faces the housing 16b.

[0060] The flange contact surface 35 is the bottom surface of the lower rectangular portion of the arch shape. When the housing 16a and the housing 16b are engaged, the flange contact surface 35 faces the flange 34 of the housing 16b. In other words, the flange contact surface 35 is located on the same plane as the top surface opening of the housing 16b.

[0061] The inner peripheral portion 31 is provided on the inner peripheral side of the outer peripheral portion 29 in the extending direction of the insertion hole 27 with the connecting portion 30 therebetween. The inner peripheral portion 31 projects further outward from the outer peripheral surface of the insertion hole 27 at the end of the insertion hole 27 on the side opposite to the narrow portion 28. The inner peripheral portion 31 is plate-shaped, and the insertion hole 27 penetrates near the central portion of the inner peripheral portion 31. In other words, the insertion hole 27 penetrates the outer peripheral portion 29 and the inner peripheral portion 31. The axial height of the inner peripheral portion 31 on the side of the housing 16a is higher than the axial height of the outer peripheral portion 29 on the side of the housing 16a. The inner peripheral portion 31 has an iron core contact surface 36 and a circuit board holding rib 37.

[0062] The iron core contact surface 36 is provided in parallel with the flange contact surface 35 at a position of the inner peripheral portion 31 closer to the insertion hole 27 than the flange contact surface 35. When the housing 16a and the housing 16b are engaged, the iron core contact surface 36 faces the yoke portion of the iron core 2, that is, covers the iron core 2.

[0063] The circuit board holding rib 37 is provided at a position of the inner peripheral portion 31 opposite to the iron core contact surface 36 with the insertion hole 27 therebetween. The circuit board holding rib 37 projects further toward the central axis 19 from the end of the insertion hole 27 on the side opposite to the narrow portion 28, and stabilizes the positional relationship between the lead and the circuit board 9 by engaging with the circuit board 9. The circuit board holding rib 37 has a wedge-shaped groove 38 and a circuit board contact surface 39.

[0064] The wedge-shaped groove 38 has a wedge shape that engages with the bulging portion 26 of the circuit board 9. That is, the bulging portion 26 becomes the male side and the wedge-shaped groove 38 becomes the female side for engagement. As Figure 7 shown, the wedge-shaped groove 38 is a groove formed by digging inward from the lower side to the upper side of the circuit board holding rib 37. By inserting the lead fixing member 12 from above the circuit board 9, the bulging portion 26 is engaged with the wedge-shaped groove 38.

[0065] The circuit board contact surface 39 forms the bottom surface of the wedge-shaped groove 38. That is, with the wedge-shaped groove 38 embedded in the bulging portion 26, the circuit board holding rib 37 is fixed to the circuit board 9 by bringing the circuit board contact surface 39 into contact with the bulging portion 26.

[0066] The connecting portion 30 connects the outer peripheral portion 29 and the inner peripheral portion 31 in such a manner that a predetermined interval (gap) is provided between the two. That is, the connecting portion 30 is a part of the outer peripheral surface of the insertion through-hole 27 and ranges from the outer peripheral side end of the outer peripheral portion 29 to the inner peripheral side end of the inner peripheral portion 31. The periphery of the U-shaped notch portion 17 is located in the gap formed by the connecting portion 30. That is, the side surface of the housing 16a having the notch portion 17 is clamped by the inner peripheral surface (excluding the covering portion 33) of the outer peripheral portion 29 and the outer peripheral surface of the inner peripheral portion 31.

[0067] The insertion through-hole extension portion 44 is provided so as to stand up in the outer peripheral direction from one end on the outer peripheral side of the insertion through-hole 27, that is, from the outer peripheral portion 29, and forms a part of the insertion portion 43. The insertion through-hole extension portion 44 extends the insertion through-hole 27 in the outer peripheral direction. The insertion through-hole extension portion 44 has a narrow portion 28 at the outer peripheral side end where the inner diameter is formed smaller than the portion on the inner peripheral side. That is, the narrow portion 28 forms a narrow opening area of the insertion through-hole 27 by bending and extending the wall surface inward in the front end of the extension direction of the insertion through-hole 27, that is, the front end of the insertion through-hole extension portion 44. In addition, in a cross-section perpendicular to the extension direction, the insertion through-hole extension portion 44 has a thick wall portion 32 whose thickness from the inner peripheral surface to the outer peripheral surface is thicker than the surrounding portion. Here, the surrounding portion refers to the portion of the wall surface forming the insertion through-hole 27 whose thickness is thinner than that of the thick wall portion 32.

[0068] The lead fixing member 12 has a tapered engaging portion 40.

[0069] The tapered engaging portion 40 is formed by the outer peripheral portion 29, the inner peripheral portion 31, and the connecting portion 30 and engages with the fixing member engaging portion 13 formed on the insulating member 3. Specifically, as Figure 6 and Figure 7 shown, in the radial direction, the tapered engaging portion 40 is a space clamped by the surface of the inner peripheral surface of the outer peripheral portion 29 on the side closer to the insertion through-hole extension portion 44 than the covering portion 33 and the outer peripheral surface of the inner peripheral portion 31. In addition, in the circumferential direction, the tapered engaging portion 40 is a space clamped by the circumferential both ends of the connecting portion 30. By inserting the fixing member engaging portion 13 shown in Figure 3 and Figure 4 from below upward into the tapered engaging portion 40 to accommodate the fixing member engaging portion 13, the lead fixing member 12 is fixed to the insulating member 3. That is, the lead fixing member 12 is firmly fixed to the circuit board 9 and the insulating member 3 by the tapered engaging portion 40 and the wedge-shaped groove 38.

[0070] Next, referring to Figure 8 、Figure 9 , Figure 10 , the circuit board 9, the lead wire 10, the protective tube 11, and the lead wire fixing member 12 that constitute the circuit board group 8 will be described. Figure 8 is a perspective view of the lower surface of the circuit board group 8 (perspective view when looking up) and a perspective view of the upper surface (perspective view when looking down), Figure 9 is an exploded view of the circuit board 9 and the lead wire fixing member 12, Figure 10 is an exploded perspective view in which only the housing 16a is not placed on the motor 6.

[0071] The lead wire 10 is composed of a plurality of wires 45, an insulating coating film 46 that covers each of the plurality of wires, and a protective tube 11 that binds and protects the plurality of insulating coating films 46.

[0072] The protective tube 11 is inserted through the insertion hole 27 of the lead wire fixing member 12, and the lead wire terminal is connected to each electrical contact of the circuit board 9.

[0073] The circuit board 9 engages with the circuit board holding rib 37 provided on the lead wire fixing member 12 at the bulging portion 26. That is, by inserting the circuit board 9 into the lead wire fixing member 12 along the direction shown by the dotted arrow 47 shown in Figure 9 , the wedge-shaped groove 38 and the circuit board contact surface 39 provided on the circuit board holding rib 37 of the lead wire fixing member 12 engage with the bulging portion 26 provided on the circuit board 9 to hold the circuit board 9. The wedge-shaped groove 38 of the lead wire fixing member 12 is a similar shape for the purpose of holding the bulging portion 26 of the circuit board 9, and the position of the circuit board 9 can be stabilized in the radial and circumferential directions by the wedge shape.

[0074] As Figure 10 shown, the stator 1 is fitted into the housing 16b having an inner diameter substantially the same as the outer diameter of the iron core 2 of the stator 1 with a specified depth. At this time, the reduced engagement portion 40 of the lead wire fixing member 12 provided in the circuit board group 8 engages with the fixing member engagement portion 13 provided in the insulating member 3, and in the axial direction, the yoke portion 7 of the iron core 2 faces the iron core contact surface 36 provided in the lead wire fixing member 12. In addition, the flange contact surface 35 provided in the lead wire fixing member 12 faces the flange 34 provided in the housing 16b.

[0075] In the above structure, the installation position of the lead wire fixing member 12 of the circuit board group 8 is determined by the bulging portion 26 provided on the circuit board 9 shown in Figure 4 and the wedge-shaped groove 38 and the circuit board contact surface 39 provided on the circuit board holding rib 37 of the lead wire fixing member 12 shown in Figures 5 to 7 . In addition, the installation position of the circuit board group 8 in the stator 1 is determined by the reduced engagement portion 40 provided in the lead wire fixing member 12 shown in Figures 6 to 7 and Figures 3 to 4The T-shaped fixing member engaging portion 13 provided in the insulating member 3 determines the position of the circuit board group 8 relative to the insulating member 3 in the circumferential and radial directions. Figure 4 The protruding portion 14 provided in the insulating member 3 shown, the notch 15 provided in the circuit board 9, and the tapered engaging portion 40 determine the position of the circuit board group 8 relative to the insulating member 3 in the circumferential and radial directions.

[0076] In addition, the axial mounting height of the circuit board group 8 is determined by Figure 3 the end face 24 of the outer diameter side bulging portion and the end face 25 of the inner diameter side bulging portion provided in the insulating member 3 shown.

[0077] Regarding the mounting of the housing 16a of the electric motor 6, by engaging the groove formed by the connecting portion 30 provided in the lead fixing member 12 with the notch portion 17 provided in the housing 16a, assembly can be easily performed. When the housing 16a and the housing 16b are engaged and pressed, the circuit board 9 is Figure 3 clamped by the end face 24 of the outer diameter side bulging portion shown and the circuit board contact surface 39 provided in the lead fixing member 12, so that the axial height is stabilized.

[0078] In addition, there is a height difference between the axial heights of the outer peripheral portion 29 and the inner peripheral portion 31 of the lead fixing member 12 on the side of the housing 16a. By using this height difference, when the housing 16a is assembled to the stator 1, the deviation between the housing 16a and the lead fixing member 12 can be absorbed, and easy automation of assembly can be expected. That is, the housing 16a is first slightly moved and brought closer to the outer peripheral portion 29 side (i.e., the lower side) of the lead fixing member 12, and then the housing 16a is moved toward the inner peripheral portion 31 side at a specified height. As a result, the inner peripheral side surface of the housing 16a abuts against the outer peripheral surface of the inner peripheral portion 31, and the deviation can be corrected. In this state, by assembling the housing 16a and the housing 16b, the notch portion 17 can be accurately inserted into the connecting portion 30 with a narrow gap. In the present embodiment, the height of the outer peripheral portion 29 is configured to be lower than the height of the inner peripheral portion 31, but the same effect can be obtained even if it is configured conversely. That is, as long as there is a difference in height (position in the height direction).

[0079] In addition, when the housing 16a and the housing 16b are engaged and pressed, as shown in Figure 7 the shape, the fixing member engaging portion 13 inserted into the tapered engaging portion 40 clamps the lead fixing member 12 from the inside to the circumferential outside, and the notch portion 17 held by the connecting portion 30 clamps the lead fixing member 12 from the outside to the circumferential inside. That is, the lead fixing member 12 and the housing 16a are tightly engaged, and the resistance to dust and moisture can be improved.

[0080] In addition, since the iron core contact surface 36 faces the yoke portion of the iron core 2, that is, it covers the iron core 2, even if there is dust or the like passing through between the outer peripheral portion 29 and the lead fixing member 12 on the opening side of the top surface of the notch portion 17, it is blocked by the iron core 2, and intrusion into the interior of the motor 6 can be prevented.

[0081] In addition, by using the insertion portion 43, the narrow portion 28, the flange contact surface 35, and the iron core contact surface 36 of the lead fixing member 12, dust and moisture from the outside can be intercepted. When further intercepting dust and moisture from the outside, by bundling the insertion hole extension portion 44 of the lead fixing member 12 with a bundling portion such as an INSULOK tie in a state where the lead wire 10 (protective tube 11) is inserted, it is possible to expect a further improvement in the resistance to dust and moisture. When bundling the insertion hole extension portion 44 with the bundling portion, by providing the insertion hole extension portion 44 with a thick wall portion 32 having a thickness thicker from the inner peripheral surface to the outer peripheral surface than the surroundings, the strength of the thick wall portion 32 can be increased. Therefore, bundling can be performed based on the thick wall portion 32, and deformation of the entire lead fixing member 12 can be suppressed.

[0082] (Embodiment 2)

[0083] A second embodiment of the present invention will be described with reference to the drawings.

[0084] Refer to Figure 11 The lead fixing member 12 of the present embodiment will be described. Figure 11 FIG. is a side sectional view of the lead fixing member 12. Compared with the side sectional view of Figure 6 , the structures of the extension portion 50 and the insulator engaging groove 52 are different. Except for this, the description of the common components and the installation method is repeated with that of Embodiment 1, and thus is omitted.

[0085] The extension portion 50 is formed by extending the inner peripheral side end portion of the wedge-shaped groove 38 of the inner peripheral portion 31 toward the iron core contact surface 36. The insulator engaging groove 52 is formed in a U-shape in a side sectional view by the insertion hole end portion 51 and the extension portion 50. For the purpose of engaging and holding the outer wall of the insulator 3, that is, the top surface of the insulator 3, with the lead fixing member 12, the extension length and the thickness of the extension portion 50 are selected to be appropriate lengths and thicknesses. Regarding the U-shaped insulator engaging groove 52, for the purpose of engaging and holding with the outer wall of the insulator 3, the width suitable for the outer wall of the insulator 3 is selected.

[0086] By adopting the above structure, in addition to being able to achieve the holding performed by the fixing member engaging portion 13 and the tapered engaging portion 40 as shown in Embodiment 1, it is also possible to achieve the holding of the lead wire fixing member 12 by the outer wall of the insulating member 3 and the U-shaped insulating member engaging groove 52, and a more firm grip can be expected. In addition, even when the radial thickness of the yoke portion 7 of the iron core 2 becomes thinner due to the miniaturization of the motor or the design of the motor, and it is difficult to form the fixing member engaging portion 13 of the insulating member 3, the holding of the lead wire fixing member 12 can be achieved by the outer wall of the insulating member 3 and the U-shaped insulating member engaging groove 52.

[0087] In the above, it has been described that in Embodiment 2, the structure of Embodiment 1 is also adopted to hold the lead wire fixing member 12, but it is also possible to adopt only the structure of Embodiment 2, that is, to hold the lead wire fixing member 12 by the outer wall of the insulating member 3 and the U-shaped insulating member engaging groove 52.

[0088] Industrial Applicability

[0089] The motor of the present invention can maintain resistance to dust and moisture regardless of the specifications of the front end of the lead wire, and can achieve automation of assembly.

[0090] Explanation of Reference Numerals

[0091] 1, 111 Stator

[0092] 2, 112 Iron Core

[0093] 3 Insulating Member

[0094] 4, 113 Winding

[0095] 5 Terminal Connection Portion

[0096] 6 Motor

[0097] 7 Yoke Portion

[0098] 8 Circuit Board Group

[0099] 9 Circuit Board

[0100] 10, 114 Lead Wire

[0101] 11 Protection Tube

[0102] 12, 115 Lead Wire Fixing Member

[0103] 13 Fixing Member Engaging Portion

[0104] 14, 14a, 14b Protrusion

[0105] 15, 15a, 15b Notch

[0106] 17 Notch Portion

[0107] 19 Central axis

[0108] 20 Outer diameter of insulating part

[0109] 21 Limiting part

[0110] 22 Root part

[0111] 23 Wiring plane

[0112] 24 End face of the bulging part on the outer diameter side

[0113] 25 End face of the bulging part on the inner diameter side

[0114] 26 Bulging part

[0115] 27 Insertion through hole

[0116] 28 Narrow part

[0117] 29 Outer peripheral part

[0118] 30 Connecting part

[0119] 31 Inner peripheral part

[0120] 32 Thick wall part

[0121] 33 Covering part

[0122] 34 Flange

[0123] 35 Flange contact surface

[0124] 36 Iron core contact surface

[0125] 37 Circuit board holding rib

[0126] 38 Wedge-shaped groove

[0127] 39 Circuit board contact surface

[0128] 40 Reduced clamping part

[0129] 41 Through hole

[0130] 43 Insertion part

[0131] 44 Extension of the insertion through hole

[0132] 45 Conducting wire

[0133] 46 Insulating coating

[0134] 47 Dotted line arrow

[0135] 48 Side A

[0136] 49 Side B

[0137] 50 Extension part

[0138] End of the 51 insertion through-hole

[0139] Engagement groove for the 52 insulating part

Claims

1. A motor, characterized in that, Comprising: A stator; A circuit board disposed on one axial end side of the stator; A lead wire led out from the circuit board; A bottomed cylindrical housing that holds the stator in an internal space from the one end side; A notch portion provided on a side surface of the housing and opening from a top surface toward a bottom surface; And A lead wire fixing member that holds the lead wire and fixes the lead wire to the notch portion, The stator includes: An iron core formed in a ring shape; A winding wound around the iron core; and An insulating member that insulates between the iron core and the winding, The lead wire fixing member is fixed to the one end side of the insulating member, The lead wire fixing member has a covering portion, and an inner peripheral surface of the covering portion faces the iron core.

2. A motor, characterized in that, Comprising: A stator; A circuit board disposed on one axial end side of the stator; A lead wire led out from the circuit board; A bottomed cylindrical housing that holds the stator in an internal space from the one end side; A notch portion provided on a side surface of the housing and opening from a top surface toward a bottom surface; And A lead wire fixing member that holds the lead wire and fixes the lead wire to the notch portion, The stator includes: An iron core formed in a ring shape; A winding wound around the iron core; and An insulating member that insulates between the iron core and the winding, The insulating member has a fixing member engaging portion that protrudes in an outer peripheral direction and engages with the lead wire fixing member, The lead wire fixing member is fixed to the fixing member engaging portion, The fixing member engaging portion has: A root portion that protrudes from the insulating member in an outer peripheral direction; and A limiting portion that protrudes in a tangential direction of a ring shape at a front end in a protruding direction of the root portion and restricts movement of the lead wire fixing member in an outer peripheral direction.

3. The motor according to claim 1 or 2, wherein: An outer peripheral side end portion of the lead wire fixing member coincides with an outer peripheral surface of the iron core.

4. The motor according to claim 1 or 2, wherein: The lead wire fixing member has: An inner peripheral portion located on an inner peripheral surface of the housing; An outer peripheral portion located on an outer peripheral surface of the housing; A connecting portion connecting the inner peripheral portion and the outer peripheral portion; and An insertion hole that penetrates the inner peripheral portion, the outer peripheral portion, and the connecting portion and through which the lead wire is inserted.

5. The motor according to claim 4, wherein: The lead wire fixing member sandwiches a side surface of the housing that forms the notch portion with the inner peripheral portion and the outer peripheral portion.

6. The motor according to claim 2, wherein: The lead wire fixing member has: An inner peripheral portion located on an inner peripheral surface of the housing; An outer peripheral portion located on an outer peripheral surface of the housing; A connecting portion connecting the inner peripheral portion and the outer peripheral portion; and An insertion hole that penetrates the inner peripheral portion, the outer peripheral portion, and the connecting portion and through which the lead wire is inserted, The lead wire fixing member sandwiches the fixing member engaging portion with the inner peripheral portion and the outer peripheral portion.

7. The motor according to claim 2, wherein: The lead wire fixing member has: An inner peripheral portion located on an inner peripheral surface of the housing; An outer peripheral portion located on an outer peripheral surface of the housing; A connecting portion connecting the inner peripheral portion and the outer peripheral portion; and An insertion hole that penetrates the inner peripheral portion, the outer peripheral portion, and the connecting portion, and through which the lead wire is inserted The lead wire fixing member radially clamps the side surface of the housing that forms the notch portion with the inner peripheral portion and the outer peripheral portion, and radially clamps the fixing member engaging portion with the inner peripheral portion and the outer peripheral portion The side surface of the housing and the fixing member engaging portion circumferentially clamp the connecting portion 8. The motor according to claim 4, wherein The end portion of the outer peripheral portion of the lead wire fixing member on the side of the top surface opening of the housing is on the same plane as the top surface opening of the housing 9. The motor according to claim 4, wherein The end portion of the outer peripheral portion of the lead wire fixing member on the side of the top surface opening of the housing covers the iron core 10. The motor according to claim 4, wherein The lead wire fixing member has an insertion hole extension portion, which is a hollow cylindrical shape and protrudes outward in the outer peripheral direction from the outer peripheral portion to extend the insertion hole The insertion hole extension portion has a thick wall portion in a cross section perpendicular to the extension direction, and the thickness from the inner peripheral surface to the outer peripheral surface is thicker than the surrounding area 11. The motor according to claim 10, wherein The insertion hole extension portion has a narrowing portion that narrows the insertion hole by extending in the radially inward direction at the front end portion in the extension direction 12. The motor according to claim 4, wherein There is a difference in the axial height between the inner peripheral portion and the outer peripheral portion of the lead wire fixing member 13. The motor according to claim 10, wherein The lead wire includes A plurality of wires; An insulating covering that covers each of the plurality of wires; and A protective tube that binds the plurality of insulating coverings The motor includes: a bundling portion that bundles the insertion hole extension portion in a state where the protective tube is inserted into the insertion hole extension portion

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