Holding structure of temperature sensor

Abstract

To provide a holding structure of a temperature sensor that can ensure a stable temperature measurement performance regardless of variations in an outer dimension of a winding wire.SOLUTION: A holding structure of a temperature sensor 50 attached to a rotary electric machin 1 having a winding wire 22, and detecting a temperature of the winding wire 22 comprises: an insulator 40 that has the winding wire 22 wound; the temperature sensor 50 that is formed into a line shape with flexibility, and has, on a tip end side 53, a temperature sensing element 55 detecting the temperature of the winding wire 22; and a sensor holder 60 that holds a base end side 51 of the temperature sensor 50, and is attached to the insulator 40. The temperature sensor 50 is held by the sensor holder 60 with the base end side 51 inclined to an outer surface 221 of the winding wire 22, and the tip end side 53 is pressed firmly against the outer surface 221 of the winding wire 22. The sensor holder 60 has a pressing part 65 capable of pressing an end part 53a on the tip end side 53 of the temperature sensor 50 firmly against the outer surface 221 of the winding wire 22.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a holding structure for a temperature sensor that is attached to an electrical device having a winding and detects the temperature of the winding. [Background technology]

[0002] In recent years, efforts to realize a low-carbon or carbon-free society have been intensified, and research and development into electrification technology has been conducted to reduce CO2 emissions and improve energy efficiency in vehicles. One example of electrification technology is the rotating electric machine installed in electric vehicles, and various ideas have been devised for the installation of temperature sensors to detect the temperature of the windings of the rotating electric machine with stable temperature measurement performance.

[0003] For example, Patent Document 1 describes a stator for a rotating electric machine that includes a stator core, a coil attached to the stator core, a temperature sensor that contacts the coil to detect the temperature of the coil, and a sensor bracket that holds the temperature sensor so as to elastically press it toward the coil.

[0004] Furthermore, Patent Document 2 describes a temperature sensor mounting structure that includes an insulator around which a coil is wound, a sensor holder that holds a temperature sensor, and a stay that holds the sensor holder by biasing the sensor holder so as to press it against the coil end. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6824765 [Patent Document 2] Patent No. 6672395 Summary of the Invention [Problem to be solved by the invention]

[0006] Since there is variation in the outer dimensions of the windings, there is also variation in the contact position between the temperature sensor and the windings. Variations in the contact position can also cause variations in the temperature measurement accuracy of the temperature sensor, so there has been a demand for ensuring stable temperature measurement performance regardless of variations in the outer dimensions of the windings.

[0007] The present invention provides a temperature sensor holding structure that can ensure stable temperature measurement performance regardless of variations in the outer dimensions of the winding. [Means for solving the problem]

[0008] The present invention relates to A holding structure for a temperature sensor attached to an electrical device having a winding and detecting a temperature of the winding, comprising: a mounting member on which the winding is wound; and the temperature sensor being formed in a flexible wire shape and having a temperature sensor element at a tip end thereof for detecting the temperature of the winding; a sensor holding member that holds a base end side of the temperature sensor opposite to a tip end side and is attached to the mounting member, the temperature sensor is held by the sensor holding member with a base end side inclined with respect to an outer surface of the winding extending along one surface of the mounting member, and a tip end side is pressed against the outer surface of the winding, The sensor holding member has a pressing portion capable of pressing a tip end of the temperature sensor against the outer surface of the winding. Effect of the Invention

[0009] According to the present invention, stable temperature measurement performance can be ensured regardless of variations in the outer dimensions of the windings. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of a rotating electric machine 1 which is an example of an electric device according to the present invention. [Diagram 2] 2 is a perspective view of the sensor holder 60 before being attached to the insulator 40. FIG. [Diagram 3]2 is a front view of the sensor holder 60 attached to the insulator 40, as viewed from the axial direction of the rotating electric machine 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] 4 is a cross-sectional view taken along line VV in FIG. [Figure 6] 4A to 4C are diagrams illustrating a procedure for attaching the sensor holder 60 to the insulator 40. [Figure 7] 13 is an enlarged cross-sectional view of an engagement hole 49a of an insulator 40 and an outer locking portion 67 of a sensor holder 60 inserted into the engagement hole 49a. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A temperature sensor holding structure according to one embodiment of the present invention will now be described with reference to the accompanying drawings.

[0012] A rotating electric machine 1, which is an example of an electric device of the present invention, is mounted on, for example, an electric vehicle and is used for driving the vehicle and for regenerative power generation. As shown in FIG.

[0013] The rotor 10 has a rotor shaft 11, and is rotatably disposed on the inner circumferential side of the stator 20. Hereinafter, the rotation axis direction of the rotor 10 (i.e., the extending direction of the rotor shaft 11) will also be referred to as the axial direction of the rotating electric machine 1.

[0014] The stator 20 is disposed on the outer periphery of the rotor 10. The stator 20 includes a coil 21, an annular stator core 23 on which the coil 21 is mounted, and a substantially cylindrical stator holder 25 that holds the stator core 23.

[0015] The rotating electric machine 1 is, for example, a three-phase AC rotating electric machine, and multiple phases (for example, U-phase, V-phase, and W-phase) of coils 21 are provided. Each coil 21 is formed of a winding 22 wound around each split core piece 30 (described later) of a stator core 23. The winding 22 has a cross section that is substantially rectangular in shape and is long horizontally (see FIG. 5).

[0016] One end 21u, 21v, 21w of the coils 21 of each phase is connected to the power supply terminal 3u, 3v, 3w of the corresponding phase. Although not shown, the power supply terminals 3u, 3v, 3w are connected to a connector for connecting an external power supply line. The other end 21n of the coils 21 of each phase is all connected electrically to one location as a neutral point.

[0017] The stator core 23 is formed by assembling a plurality of split core pieces 30 in an annular shape. In this embodiment, four split core pieces 30 are provided for each of the U phase, V phase, and W phase, that is, a total of 12 split core pieces 30 are provided. The split core pieces 30 are arranged in order such that the arrangement of the U phase, V phase, and W phase is repeated in the circumferential direction of the rotating electric machine 1. A winding 22 is wound around each split core piece 30 individually.

[0018] Each divided core piece 30 has a core body 31 (see FIG. 4) formed by laminating a plurality of steel plates, and an insulator 40 fitted around the periphery of the core body 31 to electrically insulate the core body 31.

[0019] The insulator 40 has a cylindrical portion 42, an inner circumferential flange portion 44, an outer circumferential flange portion 46, and a winding guide portion 48. The configuration of the insulator 40 will be described with reference to Figs. 1 to 5.

[0020] 4, the cylindrical portion 42 has a generally rectangular cylindrical shape penetrating in the radial direction of the rotating electric machine 1, and the core body 31 is disposed in an inner space surrounded by an outer surface 420 of the cylindrical portion 42. The axial direction of the cylindrical portion 42 coincides with the radial direction of the rotating electric machine 1.

[0021] The winding 22 is wound around the outer surface 420 of the tubular portion 42. As shown in Fig. 4 and Fig. 5, the winding 22 is wound around the tubular portion 42 between the inner flange portion 44 and the outer flange portion 46, forming layers in a direction perpendicular to the outer surface 420 of the tubular portion 42 (also referred to as the height direction of the winding 22).

[0022] The inner flange portion 44 is provided inside the cylindrical portion 42 in the radial direction of the rotating electric machine 1, and is formed integrally with the cylindrical portion 42. The inner flange portion 44 extends beyond the outer surface 220 of the winding 22 in the axial direction of the rotating electric machine 1.

[0023] 2 and 3, the inner flange portion 44 is provided with an inclined surface 441 that is inclined toward the outer flange portion 46. More specifically, the inclined surface 441 is inclined toward the outer flange portion 46 from one side to the other side in the circumferential direction of the rotating electric machine 1. The winding 22 is wound along the inclined surface 441, so that the winding 22 is shifted by one turn toward the radial outside of the rotating electric machine 1.

[0024] By forming the inclined surface 441, the portion of the inner flange portion 44 on the other side in the circumferential direction of the rotary electric machine 1 becomes thicker, and a thick portion 440 is formed in the inner flange portion 44.

[0025] 1 and 5, the outer circumferential flange portion 46 is provided outside the tubular portion 42 in the radial direction of the rotating electric machine 1 and is formed integrally with the tubular portion 42. The outer circumferential flange portion 46 extends beyond the outer surface 220 of the winding 22 in the axial direction of the rotating electric machine 1.

[0026] The winding guide portions 48 are formed integrally with the outer circumferential flange portion 46, and extend radially outward beyond the outer circumferential flange portion 46. The winding guide portions 48 route both ends of the winding 22 of the coils 21 of each phase along the circumferential direction of the stator core 23 to predetermined positions on the circumference.

[0027] The winding guide portion 48 has guide grooves 48u, 48v, 48w, and 48n that guide the winding 22 of the coil 21 of each phase on a surface corresponding to the outer circumferential surface of the stator core 23. The guide grooves 48u, 48v, and 48w respectively route one end side 21u, 21v, and 21w of the winding 22 of the coil 21 of the U-phase, V-phase, and W-phase to a predetermined position on the circumference along the circumferential direction of the stator core 23. The guide groove 48n routes the other end side 21n of the winding 22 of the coil 21 of each phase to a predetermined position on the circumference along the circumferential direction of the stator core 23. The guide grooves 48n, 48u, 48v, and 48w are formed in four stages in this order in the axial direction. Note that in FIG. 5, the winding 22 routed through the guide grooves 48n, 48u, 48v, and 48w is omitted from illustration.

[0028] 1, the temperature sensor 50 and the sensor holder 60 that holds the temperature sensor 50 are attached to the insulator 40 of one of the multiple split core pieces 30. Note that a plurality of temperature sensors 50 and sensor holders 60 may be provided.

[0029] 4, the temperature sensor 50 and the sensor holder 60 face an outer surface 421 of the outer surface 420 of the cylindrical portion 42 of the insulator 40 on the axial side of the rotating electric machine 1. The sensor holder 60 is attached to the insulator 40 such that the temperature sensor 50 abuts against the outer surface 221 of the outer surface 220 of the winding 22 that extends along the outer surface 421 of the cylindrical portion 42.

[0030] The temperature sensor 50 is formed in a flexible linear shape. The temperature sensor 50 is, for example, a thermistor. One end, or base end side 51, of the temperature sensor 50 is held by a sensor holder 60, and the other end, or tip end side 53, is not held by the sensor holder 60. The temperature sensor 50 is disposed extending in the winding direction of the winding 22, specifically, in a direction along the outer surface 421 of the tubular portion 42.

[0031] Temperature sensor 50 has a temperature sensing element 55 provided at tip side 53 for detecting the temperature of winding 22, and a lead wire 57 connected to temperature sensing element 55 and extending toward base end side 51. Temperature sensing element 55 and lead wire 57 are at least partially covered with insulating member 58. Lead wire 57 is also connected to a measurement unit (not shown) that measures the temperature of winding 22. Temperature sensor 50 can accurately detect the temperature of winding 22 by abutting tip side 53 provided with temperature sensing element 55 against outer surface 221 of winding 22.

[0032] The sensor holder 60 has a main body portion 61 extending in the extension direction of the temperature sensor 50 , and a holding portion 63 provided on one end side of the main body portion 61 and holding the temperature sensor 50 .

[0033] The holding portion 63 has a hole 64 into which the temperature sensor 50 is inserted and which holds the base end side 51 of the temperature sensor 50. The hole 64 is provided at an angle with respect to the outer surface 221 of the winding 22.

[0034] In this way, the temperature sensor 50 is held by the sensor holder 60 with the base end side 51 inclined relative to the outer surface 221 of the winding 22 extending along the outer surface 421 of the tubular portion 42, and the tip side 53 on which the temperature sensing element 55 is arranged is positioned so as to be pressed against the outer surface 221 of the winding 22.

[0035] As described above, the winding 22 is wound around the tubular portion 42 while forming layers in a direction perpendicular to the outer surface 420 of the tubular portion 42, but there is variation in the dimensions of the winding 22 in the same direction (hereinafter also referred to as the outer dimensions of the winding 22). Depending on the variation in the outer dimensions of the winding 22, the tip side 53 of the temperature sensor 50 may be lifted up from the winding 22 due to a reaction force received when pressed against the outer surface 221 of the winding 22. For example, when the outer dimensions of the winding 22 are large, the contact point between the temperature sensor 50 and the outer surface 221 of the winding 22 is closer to the base end side 51 than when the outer dimensions are small, so that the tip side 53 of the temperature sensor 50 is more likely to be lifted up against the reaction force from the winding 22. In such a case, the tip side 53 of the temperature sensor 50 on which the temperature sensitive element 55 is arranged does not contact the outer surface 221 of the winding 22, and the temperature measurement performance of the temperature sensor 50 is reduced.

[0036] Therefore, in this embodiment, the sensor holder 60 further has a pressing portion 65 that can press the end portion 53a of the tip side 53 of the temperature sensor 50 against the outer surface 221 of the winding 22. The pressing portion 65 is provided on the opposite side to the holding portion 63 in the direction in which the temperature sensor 50 extends, and faces the end portion 53a of the tip side 53 of the temperature sensor 50.

[0037] By providing the pressing portion 65, the tip side 53 of the temperature sensor 50 is prevented from floating up from the winding 22 due to the reaction force from the winding 22, and the tip side 53 of the temperature sensor 50 can be brought into contact with the outer surface 221 of the winding 22. This stabilizes the temperature measurement performance of the temperature sensor 50 regardless of variations in the outer dimensions of the winding 22. In addition, since the pressing portion 65 is provided on the sensor holder 60, there is no need to provide a member for pressing the tip side 53 of the temperature sensor 50 against the outer surface 221 of the winding 22 separately from the sensor holder 60, which allows for a reduction in the number of parts and a reduction in costs.

[0038] The pressing portion 65 will now be described in more detail. The pressing portion 65 has a pressing surface 66 that is substantially parallel to the outer surface 221 of the winding 22 that it faces.

[0039] The distance between the pressing surface 66 and the outer surface 221 of the winding 22 is set based on the tolerance of the outer dimensions of the winding 22 in a direction perpendicular to the outer surface 421 of the tubular portion 42. More specifically, when the height from the outer surface 421 of the tubular portion 42 to the outer surface 221 of the winding 22 (hereinafter also referred to as the winding height) is the maximum allowable dimension taking into account the tolerance of the outer dimensions of the winding 22, it is preferable that the distance between the pressing surface 66 and the outer surface 221 of the winding 22 is approximately the same as the outer diameter of the tip side 53 of the temperature sensor 50, as shown in Fig. 4. With this configuration, compared to when the distance between the pressing surface 66 and the outer surface 221 of the winding 22 is smaller than the outer diameter of the tip side 53 of the temperature sensor 50, it is possible to prevent the pressing pressure from the pressing surface 66 to the winding 22 from becoming excessively large, and it is possible to press the tip side 53 of the temperature sensor 50 against the outer surface 221 of the winding 22 with an appropriate pressing pressure.

[0040] When the winding height is less than the maximum allowable dimension, the distance between pressing surface 66 and outer surface 221 of winding 22 is set to be larger than the outer diameter of tip side 53 of temperature sensor 50. As the winding height decreases, the abutment point between temperature sensor 50 and outer surface 221 of winding 22 moves away from base end side 51, so that tip side 53 of temperature sensor 50 is provided in abutment along outer surface 221 of winding 22 without floating up from winding 22.

[0041] In this way, the distance between pressing surface 66 and outer surface 221 of winding 22 is approximately the same as the outer diameter of tip side 53 of temperature sensor 50 when the winding height is the maximum allowable dimension, so the pressing pressure from temperature sensor 50 to winding 22 is easily kept constant both when not in contact with pressing surface 66 and when in contact with pressing surface 66. In other words, the pressing pressure from temperature sensor 50 to winding 22 is easily kept constant regardless of variations in winding height, making the temperature measurement performance of temperature sensor 50 more stable.

[0042] Next, the attachment of the sensor holder 60 to the insulator 40 will be described. As shown in FIGS. 2, 3, and 5, the sensor holder 60 has two outer locking portions 67 and 68 that are locked to the insulator 40, and an inner locking portion 69.

[0043] When the sensor holder 60 is attached to the insulator 40, the outer locking portions 67, 68 are provided radially outward of the temperature sensor 50 from the rotating electric machine 1, and extend radially from the main body portion 61 of the rotating electric machine 1. In the direction in which the temperature sensor 50 extends, the outer locking portion 67 is provided at a position where the base end side 51 of the temperature sensor 50 is disposed, and the outer locking portion 68 is provided at a position where the tip side 53 of the temperature sensor 50 is disposed.

[0044] The winding guide portion 48 of the insulator 40 has engagement holes 49a, 49b on a surface extending in the radial direction of the rotating electrical machine 1. The outer locking portions 67, 68 are inserted into and locked in the engagement holes 49a, 49b, respectively.

[0045] The outer locking portions 67 and 68 have crank-shaped tips. The locking holes 49a and 49b are provided with locking claws 49a1 and 49b1. The outer locking portions 67 and 68 have their tips inserted into the locking holes 49a and 49b and locked by the locking claws 49a1 and 49b1.

[0046] When the sensor holder 60 is engaged with the insulator 40, the inner locking portion 69 is provided radially inward of the temperature sensor 50 in the rotating electric machine 1, and extends in the axial direction of the rotating electric machine 1. In the extension direction of the temperature sensor 50, the inner locking portion 69 is provided at a position where the base end side 51 of the temperature sensor 50 is disposed.

[0047] The inner locking portion 69 has a hooking claw 69a, and the inner flange portion 44 of the insulator 40 has a hooking portion 45 that hooks and locks the hooking claw 69a. When the sensor holder 60 is locked to the insulator 40, the hooking claw 69a is provided radially inward of the inner flange portion 44 of the rotating electric machine 1, and is hooked onto the hooking portion 45 to lock it.

[0048] The hook portion 45 is provided on the thick portion 440 of the inner peripheral flange portion 44 described above, that is, the hook claw 69a is engaged with the thick portion 440. This can increase the rigidity of the engaging portion between the hook claw 69a and the hook portion 45.

[0049] The attachment of the sensor holder 60 to the insulator 40 will be described with reference to Fig. 6. As in the above, only the engagement of the outer locking portion 67 with the engagement hole 49a will be described here, but the same applies to the engagement of the outer locking portion 68 with the engagement hole 49b.

[0050] As shown in the left diagram of Fig. 6, first, the outer locking portion 67 of the sensor holder 60 is inserted into the engagement hole 49a of the insulator 40. As shown in Fig. 7, the engagement hole 49a is formed so that the opening becomes larger toward the insertion inlet side (upper side in Fig. 7) of the outer locking portion 67, in other words, the engagement hole 49a has a shape that invites the insertion of the outer locking portion 67. Therefore, the outer locking portion 67 is configured to be easily inserted into the engagement hole 49a.

[0051] 6, after the outer locking portion 67 is inserted into the engagement hole 49a, the sensor holder 60 is rotated around the engagement hole 49a in a direction in which the hook claw 69a of the inner locking portion 69 hooks onto the hook portion 45 of the insulator 40. In this manner, the engagement hole 49a supports the sensor holder 60 rotatably around the engagement hole 49a in a state in which the hook claw 69a is not engaged with the hook portion 45 of the insulator 40.

[0052] 6, as the sensor holder 60 is rotated further, the hook claw 69a of the inner locking portion 69 is hooked and locked to the hook portion 45 of the insulator 40. At this time, the outer locking portion 67 is locked to the engagement claw 49a1 provided in the engagement hole 49a. In this manner, the attachment of the sensor holder 60 to the insulator 40 is completed.

[0053] In this way, since the sensor holder 60 is provided on both sides of the temperature sensor 50 in the direction perpendicular to the direction in which the temperature sensor 50 extends, it becomes easier to keep the pressing pressure from the temperature sensor 50 to the winding 22 constant.

[0054] Furthermore, the outer locking portion 67 and the inner locking portion 69 of the sensor holder 60 are provided at a position where the base end side 51 of the temperature sensor 50 is located in the extension direction of the temperature sensor 50, so that when the sensor holder 60 is attached to the insulator 40, misalignment of the base end side 51 of the temperature sensor 50 can be suppressed.

[0055] In addition, the sensor holder 60 has an outer locking portion 67 and an inner locking portion 69 at the position where the base end side 51 of the temperature sensor 50 is located in the extension direction of the temperature sensor 50, and an outer locking portion 68 at the position where the tip side 53 of the temperature sensor 50 is located, so that the sensor holder 60 can be stably attached to the insulator 40.

[0056] In addition, the sensor holder 60 can be attached to the insulator 40 by rotating the sensor holder 60 around the engagement holes 49a, 49b as fulcrums and hooking the hook claws 69a of the sensor holder 60 onto the hook portions 45 of the insulator 40, thereby facilitating assembly with a simple configuration.

[0057] Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. In addition, the components in the above embodiment may be arbitrarily combined within the scope of the invention.

[0058] For example, in the above embodiment, the rotating electric machine 1 is described as an example of the electric device of the present invention, but the present invention is not limited to this. The electric device of the present invention may be, for example, a transformer having a winding, that is, the temperature sensor holding structure of the present invention can be applied to a transformer having a winding.

[0059] This specification describes at least the following items. In parentheses, components corresponding to the above-described embodiment are shown as examples, but the present invention is not limited to these.

[0060] (1) A holding structure for a temperature sensor (temperature sensor 50) that is attached to an electric device (rotating electric machine 1) having a winding (winding 22) and detects the temperature of the winding, a mounting member (insulator 40) around which the winding is wound; The temperature sensor is formed in a flexible wire shape and has a temperature sensor (temperature sensor 55) at a tip end (tip end 53) thereof for detecting the temperature of the winding; a sensor holding member (sensor holder 60) that holds a base end side (base end side 51) of the temperature sensor opposite to the tip end side and is attached to the mounting member, The temperature sensor is held by the sensor holding member with the base end side inclined with respect to an outer surface (outer surface 221) of the winding extending along one surface (outer surface 421) of the mounting member, and the tip end side is pressed against the outer surface of the winding, The sensor holding member has a pressing portion (pressing portion 65) capable of pressing an end portion (end portion 53a) of the tip side of the temperature sensor against the outer surface of the winding. Temperature sensor holding structure.

[0061] According to (1), the pressing portion of the sensor holding member is provided so that the tip end of the temperature sensor can be pressed against the outer surface of the winding, so that the temperature sensor can be prevented from floating up from the winding due to the reaction force received when the tip end of the temperature sensor is pressed against the outer surface of the winding. Therefore, the temperature measurement performance of the temperature sensor is stable regardless of the variation in the outer dimensions of the winding. In addition, since there is no need to provide a member for pressing the temperature sensor against the outer surface of the winding separately from the sensor holding member, costs can be reduced.

[0062] (2) A holding structure for a temperature sensor according to (1), The pressing portion has a pressing surface (pressing surface 66) that is substantially parallel to the outer surface of the opposing winding, a distance between the outer surface of the winding and the pressing surface is approximately equal to an outer diameter of a tip side of the temperature sensor when a height from the one surface of the mounting member to the outer surface of the winding is a maximum allowable dimension. Temperature sensor holding structure.

[0063] According to (2), the pressing pressure from the temperature sensor to the winding can be easily kept constant regardless of whether the tip of the temperature sensor is in contact with the pressing surface or not, which makes the temperature measurement performance more stable.

[0064] (3) A holding structure for a temperature sensor according to (1) or (2), The sensor holding member has a first locking portion (outer locking portion 67) and a second locking portion (inner locking portion 69) that are locked to the mounting member, The first locking portion is provided on one side (radially outer side) of the temperature sensor in a direction perpendicular to a direction in which the temperature sensor extends, The second locking portion is provided on the other side (radially inner side) of the temperature sensor in a direction perpendicular to the extension direction of the temperature sensor. Temperature sensor holding structure.

[0065] According to (3), since the temperature sensor is disposed between the first locking portion and the second locking portion, it becomes easier to keep the pressing pressure from the temperature sensor to the winding constant.

[0066] (4) A holding structure for a temperature sensor according to (3), The mounting member has an engagement hole (engagement hole 49a) through which the first engagement portion is inserted and engaged, The engagement hole supports the sensor holding member rotatably with the engagement hole as a fulcrum when the second engagement portion is not engaged with the mounting member. Temperature sensor holding structure.

[0067] According to (4), the first locking portion of the sensor-holding member is inserted into the engagement hole of the mounting member, and the sensor-holding member is rotated around the engagement hole as a fulcrum to lock the second locking portion to the mounting member. Thus, the sensor-holding member can be easily attached to the mounting member with a simple configuration.

[0068] (5) A holding structure for a temperature sensor according to (4), The second engaging portion of the sensor holding member has a hook (hook claw 69a), The mounting member has a hook portion (hook portion 45) that hooks and engages the hook claw of the second engaging portion, Temperature sensor holding structure.

[0069] According to (5), the sensor holding member can be easily attached to the mounting member by rotating the sensor holding member around the engagement hole as a fulcrum and hooking the hook of the sensor holding member onto the hook of the mounting member.

[0070] (6) A holding structure for a temperature sensor according to (4) or (5), The engagement hole has an opening that becomes larger toward the insertion inlet side of the first locking portion. Temperature sensor holding structure.

[0071] According to (6), the engagement hole has a shape that invites the insertion of the first locking portion, so that the first locking portion can be easily inserted.

[0072] (7) A holding structure for a temperature sensor according to any one of (3) to (6), The first locking portion and the second locking portion are provided at a position where a base end side of the temperature sensor is disposed in an extension direction of the temperature sensor. Temperature sensor holding structure.

[0073] According to (7), since the first and second locking portions are provided in the vicinity of the portion of the sensor holding member that holds the temperature sensor, displacement of the base end side of the temperature sensor can be suppressed.

[0074] (8) A holding structure for a temperature sensor according to (7), The sensor holding member further includes a third locking portion (outer locking portion 68) provided on the one side of the temperature sensor in a direction perpendicular to the extension direction of the temperature sensor, The third locking portion is provided at a position where a tip side of the temperature sensor is disposed in a direction in which the temperature sensor extends. Temperature sensor holding structure.

[0075] According to (8), the first locking portion, the second locking portion, and the third locking portion are provided at positions where the base end and tip end of the temperature sensor are located in the direction in which the temperature sensor extends, so that the sensor holding member can be stably attached to the mounting member.

[0076] (9) A holding structure for a temperature sensor according to any one of (3) to (8), The mounting member is a cylindrical portion (cylindrical portion 42) around which the winding is wound in the extending direction of the temperature sensor; a first flange portion (outer peripheral flange portion 46) provided on the one side in a direction perpendicular to the extending direction of the temperature sensor; a second flange portion (inner circumferential flange portion 44) provided on the other side in a direction perpendicular to the extending direction of the temperature sensor; an extension portion (winding guide portion 48) extending further from the first flange portion to the one side, The second flange portion is provided with a thick portion (thick portion 440) formed by an inclined surface (inclined surface 441) inclined toward the first flange portion, The first engaging portion is engaged with the extension portion, The second engaging portion is engaged with the thick portion of the second flange portion. Temperature sensor holding structure.

[0077] According to (9), since the portion of the mounting member where the sensor holding member is engaged is a thick portion, the rigidity of the engaging portion can be increased. [Explanation of symbols]

[0078] 1 Rotating electric machines (electrical equipment) 22 Windings 221 External surface 40 Insulator (mounting material) 42 Cylinder part 421 External surface (one side) 44 Inner flange portion (second flange portion) 440 Thick wall part 441 Slope 45 Hook section 46 Outer flange portion (first flange portion) 48 Winding guide part (extension part) 49a Engagement hole 50 Temperature Sensor 51 Base end 53 Tip side 53a End 55 Thermosensor 60 Sensor holder (sensor holding member) 65 Pushing part 66 Pressing surface 67 Outer locking part (first locking part) 68 Outer locking part (third locking part) 69 Inner locking portion (second locking portion) 69a Grabbing claw

Claims

1. A holding structure for a temperature sensor attached to an electrical device having a winding and detecting a temperature of the winding, comprising: a mounting member on which the winding is wound; and the temperature sensor being formed in a flexible wire shape and having a temperature sensor element at a tip end thereof for detecting the temperature of the winding; a sensor holding member that holds a base end side of the temperature sensor opposite to a tip end side and is attached to the mounting member, the temperature sensor is held by the sensor holding member with a base end side inclined with respect to an outer surface of the winding extending along one surface of the mounting member, and a tip end side is pressed against the outer surface of the winding, the sensor holding member has a pressing portion capable of pressing a tip end of the temperature sensor against the outer surface of the winding, Temperature sensor holding structure.

2. The temperature sensor holding structure according to claim 1, the pressing portion has a pressing surface that is substantially parallel to the outer surface of the opposing winding, a distance between the outer surface of the winding and the pressing surface is approximately equal to an outer diameter of a tip side of the temperature sensor when a height from the one surface of the mounting member to the outer surface of the winding is a maximum allowable dimension. Temperature sensor holding structure.

3. The temperature sensor holding structure according to claim 1 or 2, the sensor holding member has a first locking portion and a second locking portion that are locked to the mounting member, the first engaging portion is provided on one side of the temperature sensor in a direction perpendicular to a direction in which the temperature sensor extends, The second engaging portion is provided on the other side of the temperature sensor in a direction perpendicular to a direction in which the temperature sensor extends. Temperature sensor holding structure.

4. The temperature sensor holding structure according to claim 3, The mounting member has an engagement hole through which the first engaging portion is inserted and engaged, The engagement hole supports the sensor holding member rotatably with the engagement hole as a fulcrum when the second engagement portion is not engaged with the mounting member. Temperature sensor holding structure.

5. The temperature sensor holding structure according to claim 4, The second engaging portion of the sensor holding member has a hook. The mounting member has a hook portion that hooks and engages the hook claw of the second engaging portion. Temperature sensor holding structure.

6. The temperature sensor holding structure according to claim 4, The engagement hole has an opening that becomes larger toward the insertion inlet side of the first locking portion. Temperature sensor holding structure.

7. The temperature sensor holding structure according to claim 3, The first locking portion and the second locking portion are provided at a position where a base end side of the temperature sensor is disposed in an extension direction of the temperature sensor. Temperature sensor holding structure.

8. The temperature sensor holding structure according to claim 7, the sensor holding member further includes a third locking portion provided on the one side of the temperature sensor in a direction perpendicular to a direction in which the temperature sensor extends, The third locking portion is provided at a position where a tip side of the temperature sensor is disposed in an extension direction of the temperature sensor. Temperature sensor holding structure.

9. The temperature sensor holding structure according to claim 3, The mounting member is a cylindrical portion around which the winding is wound in a direction in which the temperature sensor extends; a first flange portion provided on the one side in a direction perpendicular to a direction in which the temperature sensor extends; a second flange portion provided on the other side in a direction perpendicular to a direction in which the temperature sensor extends; an extension portion extending from the first flange portion to the one side, The second flange portion is provided with a thick portion formed by an inclined surface inclined toward the first flange portion, The first engaging portion is engaged with the extension portion, The second engaging portion is engaged with the thick portion of the second flange portion. Temperature sensor holding structure.

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