Insulator and stator

Abstract

The present invention provides an insulator and a stator, which can easily install a temperature sensor even when a stator coil is wound before the temperature sensor is installed. Provided is an insulator having a main body and a flange portion provided at the end of the main body, the insulator is installed on a stator core, and a stator coil is wound on the main body, wherein a through-passage is formed in the flange portion with a width through which a temperature sensor for detecting the temperature of the stator coil can pass, and a slit portion is formed with a width through which a wiring connected to the temperature sensor can pass and which is narrower than the width of the through-passage, the through-passage penetrates the flange portion from the inner side where the stator coil is provided to the outer side which is the opposite side thereof, and the slit portion is provided along the through-passage so that the through-passage is open to the outer peripheral side of the flange portion.

Description

Technical Field

[0001] The invention relates to an insulator and a stator of a motor. Background Art

[0002] In the past, the following technology is known: by measuring the temperature of the stator coil in the motor, an abnormal temperature rise of the stator coil is detected. Patent document 1 discloses the following method: a notch is provided from the outer peripheral side of the flange portion toward the main body of the insulator on the flange portion (flange) of the insulator around which the stator coil is wound, and a temperature sensor is inserted and installed along the notch portion.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-106955 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in the method disclosed in Patent Document 1, since the temperature sensor is inserted along a cutout portion provided from the outer peripheral side of the flange portion toward the main body portion of the insulator, when a stator coil is wound on the main body portion of the insulator before the temperature sensor is installed, there is the following problem: when the temperature sensor is inserted along the cutout portion, the end of the temperature sensor is caught on the end of the stator coil, making it difficult to insert the temperature sensor.

[0008] Therefore, an object of the present invention is to provide an insulator and a stator that can easily mount a temperature sensor even when a stator coil is wound before mounting the temperature sensor.

[0009] Means for solving problems

[0010] The insulator of the present invention comprises a main body and a flange portion arranged at the end of the main body, the insulator is mounted on a stator core, and a stator coil is wound on the main body, wherein a through-passage is formed in the flange portion with a width through which a temperature sensor for detecting the temperature of the stator coil can pass, and a slit portion is formed with a width through which a wiring connected to the temperature sensor can pass and which is narrower than the width of the through-passage, the through-passage penetrates the flange portion from the inner side where the stator coil is arranged to the outer side which is the opposite side thereof, and the slit portion is arranged along the through-passage so that the through-passage is open to the outer peripheral side of the flange portion.

[0011] The stator of the present invention comprises: the insulator of the present invention described above; a stator core on which the insulator is installed; a stator coil wound around the main body of the insulator; and a temperature sensor inserted from the above-mentioned outside into the through-passage of the flange portion of the insulator and installed at a position reaching the above-mentioned inner surface of the flange portion.

[0012] Effects of the Invention

[0013] According to the insulator and the stator of the present invention, even when the stator coil is wound before the temperature sensor is mounted, the temperature sensor can be easily mounted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a longitudinal sectional view showing a motor to which the insulator and the stator according to the embodiment are applied.

[0015] Figure 2 It is shown Figure 1 An enlarged cross-sectional view of section A.

[0016] Figure 3 It is a perspective view showing an insulator in a state where a temperature sensor is mounted.

[0017] Figure 4 Viewed from the outer circumference of the flange Figure 3 Top view of the insulator.

[0018] Figure 5 It is along Figure 4 Cross-sectional view of line BB.

[0019] Figure 6 It is along Figure 5 Cross-sectional view of the CC line.

[0020] Figure 7 It is a cross-sectional view taken along line CC showing a first modified example of the insulator according to the embodiment.

[0021] Figure 8 It is a cross-sectional view taken along line CC showing a second modified example of the insulator according to the embodiment.

[0022] Description of symbols

[0023] 1: Motor; 2: Stator; 3: Rotor; 4: Housing; 5: Bearing; 6: Rotating shaft; 21: Stator core; 22: Insulator; 23: Stator coil; 24: Temperature sensor; 31: Rotor core; 32: Permanent magnet; 221: Main body; 222: First flange; 223: Second flange; 224: Through passage; 225: Slit; 24a: Wiring; 223a: Groove; 224a: Upper surface; 225a: Wiring storage; 225b, 225c, 225d: Narrow width. DETAILED DESCRIPTION

[0024] Hereinafter, an insulator and a stator according to the embodiment will be described. Figure 1 It is a longitudinal sectional view of a motor to which the insulator and the stator according to the embodiment are applied. Figure 2 It is shown Figure 1 An enlarged cross-sectional view of section A. Figure 3 : is a perspective view showing an insulator in a state where a temperature sensor is mounted. Figure 1 and Figure 2 As shown, the motor 1 includes: a housing 4; a rotating shaft 6 rotatably supported by the housing 4 via a pair of bearings 5; a rotor 3 fixed to the rotating shaft 6; and a stator 2 arranged around the rotor 3. The rotor 3 includes a cylindrical rotor core 31 as a magnetic body and a permanent magnet 32 ​​arranged around the rotor core 31.

[0025] The stator 2 includes a stator core 21 disposed to face the rotor 3 with a gap therebetween, an insulator 22 mounted on the stator core 21, a stator coil 23 wound around the stator core 21 with the insulator 22 therebetween, and a temperature sensor 24 for detecting the temperature of the stator coil 23. The stator core 21 is formed by laminating a plurality of magnetic plates (e.g., steel plates, etc.). The insulator 22 is made of an electrically insulating material (e.g., resin, etc.), and ensures the insulation state of the stator coil 23 relative to the stator core 21. The temperature sensor 24 is connected to a wiring 24a.

[0026] like Figure 2 and Figure 3 As shown, the insulator 22 has a main body 221 and a first flange 222 and a second flange 223 provided at both ends of the main body 221. The insulator 22 is mounted on the stator core 21, and the stator coil 23 is wound on its main body 221. At this time, the stator coil 23 contacts the first flange 222 and the second flange 223 at both ends of the winding, and its positional deviation is restricted. In addition, the second flange 223 is provided with a slot 223a through which the lead end of the stator coil 23 on the winding start side and the lead end on the winding end side pass.

[0027] The second flange portion 223 is provided with a through passage 224 which has an opening in a part of a region in contact with the stator coil 23 wound on the main body portion 221 and penetrates the second flange portion 223 from the inner side where the stator coil 23 is provided to the outer side which is the opposite side. In addition, the second flange portion 223 is provided with a slit portion 225 which is provided along the through passage 224 and opens the through passage 224 to the outer peripheral side of the second flange portion 223. That is, the second flange portion 223 is provided with a space formed by the through passage 224 and the slit portion 225 along a direction (a radial direction of the insulator 22 and the stator 2) perpendicular to the longitudinal direction of the main body portion 221 of the insulator 22. The second flange portion 223 corresponds to the flange portion in the present invention.

[0028] In addition, in the present invention, if Figure 2As shown, the side of the second flange 223 where the stator coil 23 is provided is referred to as the "inner side", and the opposite side is referred to as the "outer side". In addition, the side of the second flange 223 away from the main body 221 is referred to as the "outer peripheral side of the second flange 223".

[0029] Figure 4 The second flange portion 223 is viewed from the outer peripheral side. Figure 3 A top view of the insulator 22 is shown. Figure 5 It is along Figure 4 The cross-sectional view of the BB line. Figure 5 As shown, the through-passage 224 is formed with a width d1 through which the temperature sensor 24 for detecting the temperature of the stator coil 23 can pass. Here, the width d1 through which the temperature sensor 24 can pass refers to a width to the extent that the temperature sensor 24 can be inserted into the through-passage 224 from the outside and moved inward, and the temperature sensor 24 is in a state where the surface of the side to be measured faces inward near the installation position in contact with the stator coil 23 (the inner end of the second flange portion 223).

[0030] For example, when the temperature sensor 24 is inserted into the through-passage 224 and moved to the inner installation position while keeping the surface of the side for measurement facing inward, the width of the temperature sensor 24 in the left-right direction with the surface of the side for measurement as the front side plus the specified gap amount can be set as the width d1 of the through-passage 224.

[0031] In addition, if Figure 2 As shown in FIG. 1 , the upper surface 224a of the through-passage 224, which is the surface on the outer peripheral side of the second flange portion 223, is inclined in a manner that gradually approaches the outer peripheral side of the second flange portion 223 from the outside toward the inside. In other words, the through-passage 224 is formed so that the height h from its bottom surface 224b to the upper surface 224a continuously increases from the outside toward the inside. Thus, when installing the temperature sensor 24, the temperature sensor 24 is inserted into the through-passage 224 from the outside, and the wiring 24a is pulled toward the outer peripheral side of the second flange portion 223, so that the temperature sensor 24 can be installed as shown in FIG. Figure 2 As shown by arrow P in FIG. 2 , the stator 22 can slide along the upper surface 224 a and easily move to a mounting position in contact with the stator coil 23 .

[0032] like Figure 5As shown in FIG. 1 , the slit 225 is formed with a width d2 that is narrower than the width d1 of the through-hole 224 and through which the wiring 24a connected to the temperature sensor 24 can pass. Here, the width d2 through which the wiring 24a can pass refers to the width obtained by adding a predetermined gap amount to the width of one wiring 24a. This is because, although the two wirings 24a connected to the temperature sensor 24 can pass through the slit 225 in a state of being arranged horizontally, they can also pass through the slit 225 one by one by slightly shifting their positions front and back (or rotating them).

[0033] In addition, the slit portion 225 is formed with a width narrower than the width of the through passage 224, which means that at each position from the outside to the inside of the slit portion 225 set along the through passage 224, the width d2 of the slit portion 225 at that position is narrower than the width d1 of the through passage 224 at the same position.

[0034] In addition, the slit portion 225 is formed with a width narrower than the width in the left-right direction when the surface of the temperature sensor 24 on the side where the measurement is performed is the front face. Thus, when the temperature sensor 24 is moved in the through passage 224 with the surface of the side where the measurement is performed facing inward, the movement of the temperature sensor 24 toward the outer peripheral side of the second flange portion 223 can be restricted by the slit portion 225. In addition, when the wiring 24a is pulled toward the outer peripheral side of the second flange portion 223, the temperature sensor 24 can be prevented from coming out toward the outer peripheral side of the second flange portion 223.

[0035] Figure 6 It is along Figure 5 The cross-sectional view of the CC line. Figure 6 As shown, the slot 225 is provided with a wiring storage portion 225a, which is provided at the inner end to form a space with a width d21 of more than two wirings 24a. In addition, the slot 225 is provided with a narrow width portion 225b, which is provided between the outer end and the wiring storage portion 225a to form a space with a width d22 wider than the width of one wiring 24a and narrower than the width of two wirings 24a. That is, between the outer end of the slot 225 and the wiring storage portion 225a, a narrow width portion 225b is provided to form a space narrower in width than the wiring storage portion 225a. Thus, the wiring 24a that moves from the outer side to the wiring storage portion 225a inside the slot 225 can be suppressed from returning to the outer side by the narrow width portion 225b.

[0036] Specifically, in order to install the temperature sensor 24, the temperature sensor 24 is inserted into the through-passage 224, and the wiring 24a extending from the temperature sensor 24 to the outer peripheral side of the second flange portion 223 through the slit portion 225 is moved from the outside to the inside. Thus, the wiring 24a passes through the narrow width portion 225b and reaches the wiring storage portion 225a having a width wider than the wiring 24a. After the wiring 24a reaches the wiring storage portion 225a having a wide width, it is difficult to move to the narrow width portion 225b having a narrower width than the wiring 24a. Thus, the narrow width portion 225b has an effect of suppressing the wiring 24a from returning to the outside.

[0037] As described above, according to the insulator 22 and the stator 2 of the embodiment, the temperature sensor 24 can be easily installed even when the stator coil 23 is wound before the temperature sensor 24 is installed. Specifically, in the previous method of inserting the temperature sensor along the cutout portion provided from the outer peripheral side of the flange portion toward the main body, there is a problem that when the temperature sensor is inserted, the end of the temperature sensor is caught on the end of the stator coil, making it difficult to insert the temperature sensor. In contrast, in the insulator 22 and the stator 2 of the present invention, the temperature sensor 24 can be inserted along the through-passage 224 that penetrates the second flange portion 223 from the inside to the outside. That is, the temperature sensor 24 can be inserted in the direction in which the temperature sensor 24 is adjacent to the stator coil 23. As a result, when the temperature sensor 24 is installed on the insulator 22, the end of the temperature sensor 24 will not be caught on the end of the stator coil 23, and it can be easily installed.

[0038] In addition, in the above embodiment, Figure 6 In the example, the entire section from the outer end of the slot 225 to the front of the wiring receiving section 225a is formed as the narrow width section 225b, but it is not limited to this. The narrow width section can be partially set at any position between the outer end of the slot 225 and the wiring receiving section 225a. Thus, the wiring 24a can be suppressed from returning to the outside from the position where the narrow width section is set by the narrow width section. Figure 7 FIG. 1 is a cross-sectional view taken along line CC showing a first modified example of the insulator according to the embodiment. Figure 7 As shown, a narrow width portion 225c may be provided at a position closer to the wiring receiving portion 225a than the approximate center between the outer end of the slot portion 225 and the wiring receiving portion 225a. The slot portion 225 has a width d23 in the narrow width portion 225c that is wider than the width of one wiring 24a and narrower than the width of two wirings 24a.

[0039] Figure 8 2 is a cross-sectional view taken along line CC showing a second modified example of the insulator 22 of the embodiment. Figure 8As shown, a narrow portion 225d may be provided between the outer end of the slot portion 225 and the wiring storage portion 225a at a position adjacent to the wiring storage portion 225a. The slot portion 225 has a width d24 in the narrow portion 225d that is wider than the width of one wiring 24a and narrower than the width of two wirings 24a. Thus, the narrow portion 225d can suppress the wiring 24a that has moved from the outside to the wiring storage portion 225a to the inside in the slot portion 225 from returning to the outside from this position. Furthermore, as shown in FIG. Figure 8 As shown, in the narrow width portion 225d formed by the convex portions protruding from the left and right sides of the slit portion 225, the front ends of the convex portions may be directed inward. This can more reliably prevent the wiring 24a that has moved to the wiring storage portion 225a from returning outward from that position.

[0040] In addition, in the above embodiment, the through passage 224 and the slit 225 for mounting the temperature sensor 24 are provided in the second flange 223 of the insulator 22, but the present invention is not limited thereto. The through passage 224 and the slit 225 may be provided in the first flange 222 instead of the second flange 223 or in addition thereto.

[0041] In addition, in the above-mentioned embodiment, the case where the through-passage 224 has a fixed width from the outside to the inside is described, but it is not limited to this. The width of the through-passage 224 may be gradually or stepwise narrowed or widened from the outside to the inside within a range that does not hinder the passage of the temperature sensor 24. For example, the insertion of the temperature sensor 24 into the through-passage 224 may be facilitated by making the width of the outside of the through-passage 224 slightly wider. In addition, in the case where the width of the temperature sensor 24 in the front-to-back direction is smaller than the width in the left-to-right direction when the surface of the side where the measurement is performed is the front face, the temperature sensor 24 is inserted into the through-passage 224 in a state where the surface of the side where the measurement is performed faces the side of the through-passage 224 and moved to the vicinity of the installation position, and the temperature sensor 24 is rotated near the installation position so that the surface of the side where the measurement is performed faces the inside, the width of the through-passage 224 from the outside to the vicinity of the installation position may be smaller than the width of the through-passage 224 near the installation position.

Claims

1. An insulator having a main body and a flange provided at an end of the main body, the insulator being mounted on a stator core, and a stator coil being wound around the main body, wherein: In the flange portion, a through passage is formed with a width that allows a temperature sensor for detecting the temperature of the stator coil to pass from the outer side, which is the opposite side of the inner side, where the stator coil is provided, to the inner side where the stator coil is provided, and a slit portion is formed with a width that allows wiring connected to the temperature sensor to pass and is narrower than the width of the through passage, the through passage has an opening in a portion of the area in contact with the stator coil, and the through passage passes through the flange portion from the inner side to the outer side, and the slit portion is provided along the through passage and opens the through passage to the outer peripheral side of the flange portion, which is the side away from the main body portion.

2. The insulator according to claim 1, wherein The gap portion has: a wiring storage portion provided at the inner end portion and forming a space having a width for two or more of the wirings; and The narrow width portion is provided between the outer end of the slit portion and the wiring accommodating portion, and forms a space having a width wider than a width of one of the wirings and narrower than a width of two of the wirings.

3. The insulator according to claim 2, wherein: The narrow width portion is provided between the outer end portion of the slit portion and the wiring housing portion and at a position adjacent to the wiring housing portion.

4. The insulator according to any one of claims 1 to 3, wherein: An upper surface of the through passage, which is a surface on the outer peripheral side of the flange portion, is inclined so as to gradually approach the outer peripheral side of the flange portion as it moves from the outer side toward the inner side.

5. A stator, comprising: The insulator according to any one of claims 1 to 4; The stator core is provided with the insulator; the stator coil being wound around the main body of the insulator; and The temperature sensor is inserted into the through passage of the flange portion of the insulator from the outside and mounted at a position reaching the inner surface of the flange portion.

Images