JP2014178258A - Sensor bracket and fitting method of sensor bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensor bracket capable of easily fitting a temperature sensor to a stator with high position accuracy, and a fitting method of the sensor bracket.SOLUTION: A sensor bracket 50 includes a bracket body 51 having a knock pin insertion hole 54 and a fastening bolt hole 55, a spring part 52 extending from the bracket body 51 and having elasticity, and a sensor holding part 53 holding a temperature sensor 60 for detecting the temperature of a segment conductor type coil 15 provided on the tip part of the spring part 52 and combining a flat square conductor. A knock pin 41 of a housing 11 is fitted into the knock pin insertion hole 54, and a fastening bolt 43 penetrating through the fastening bolt hole 55 is screwed into a bolt hole 42, and thereby the sensor bracket is fixed to the housing 11.

Description

  The present invention relates to a sensor bracket for holding a temperature sensor for detecting the temperature of a coil combined with a flat conductor, and a method for mounting the sensor bracket.

  Conventionally, as shown in FIG. 7, the first region 101 disposed in the flange portion 111 of the outer cylindrical ring 110 of the stator and the inner periphery of the cylindrical portion 112 of the outer cylindrical ring 110 connected to the first region 101. A bracket 100 that includes a second region 102 disposed on a surface 112a and holds a temperature sensor 120 for detecting the temperature of the coil end 113 is disclosed (for example, Patent Document 1).

  In the bracket 100 described in Patent Document 1, the intersection angle between the first region 101 and the second region 102 is an acute angle, a bracket bolt hole 103 is provided in the first region 101, and the second region 102 is provided in the second region 102. A temperature sensor fixing region 104 for holding the temperature sensor 120 is provided. The temperature sensor 120 includes a main body part 121 and a temperature sensitive part 122 held by the main body part 121. The bracket 100 is fixed to the flange portion 111 by screwing a bolt 105 inserted through the bracket bolt hole 103 into a bolt hole (not shown) of the flange portion 111 of the outer cylinder ring 110. When the bolt 105 inserted through the bracket bolt hole 103 is rotated in the clockwise direction (T direction in the figure) to fix the bracket 100, the bracket 100 is rotated in the clockwise direction and the second region 102 is It is pressed against the inner peripheral surface 112a of the cylindrical portion 112 and is fixed to the outer cylindrical ring 110 with high accuracy.

JP 2012-178923 A

  However, in the bracket 100 described in Patent Document 1, due to the manufacturing accuracy of the intersection angle between the first region 101 and the second region 102, the deflection of the second region 102 due to the tightening torque that acts when the bracket 100 is attached, and the like. As a result, the assembly accuracy varies, and in extreme cases, the measurement temperature of the coil end 113 may be affected, and there is room for improvement.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a sensor bracket and a method for attaching the sensor bracket that can easily attach the temperature sensor to the stator with high positional accuracy. It is in.

In order to achieve the above object, the invention according to claim 1
A stator (for example, described later) including a stator core (for example, first and second stator cores 13A, 13B in an embodiment described later) and a coil (for example, stator coils 15A, 15B in an embodiment described later) combined with a rectangular conductor. A sensor bracket (for example, a sensor bracket 50 in an embodiment described later) attached to a housing (for example, a housing 11 in an embodiment described later) that supports the first and second stators 12A, 12B) in the embodiment;
A knock pin insertion hole (for example, a knock pin insertion hole 54 in an embodiment described later) that fits into a knock pin (for example, a knock pin 41 in an embodiment described later) provided in the housing, and a bolt hole (for example, A fastening bolt hole (for example, a fastening bolt hole 55 in the later-described embodiment) through which a fastening bolt (for example, a fastening bolt 43 in the later-described embodiment) screwed into the bolt hole 42 in the later-described embodiment is passed. A bracket body (for example, a bracket body 51 in an embodiment described later),
A spring portion (for example, a spring portion 52 in an embodiment described later) extending inward from the bracket body and having elasticity in the radial direction;
A sensor holding portion (for example, a sensor holding portion 53 in an embodiment described later) that is provided at the tip of the spring portion and holds a temperature sensor (for example, a temperature sensor 60 in an embodiment described later) that detects the temperature of the coil. And.

In addition to the configuration of claim 1, the invention according to claim 2
The knock pin is press-fitted into the knock pin insertion hole.

In addition to the configuration of claim 1 or 2, the invention according to claim 3
The spring portion is located on the opposite side of the fastening bolt hole with respect to the knock pin insertion hole.

In addition to the structure of any one of Claims 1-3, the invention which concerns on Claim 4
The bracket body includes a harness holding portion (for example, a harness holding portion 56 in an embodiment described later) that holds a harness (for example, a harness 61 in an embodiment described later) extending from the temperature sensor.

The invention according to claim 5 includes, in addition to the configuration of claim 4,
The spring portion has a substantially U shape when viewed from the axial direction of the stator,
The spring part is formed with a notch (for example, a notch 57 in an embodiment described later) on the housing side so that the harness can be held in the harness holding part through the notch. It is characterized by that.

The invention according to claim 6
A stator (for example, described later) including a stator core (for example, first and second stator cores 13A, 13B in an embodiment described later) and a coil (for example, stator coils 15A, 15B in an embodiment described later) combined with a rectangular conductor. In a mounting method of a sensor bracket (for example, a sensor bracket 50 in a later-described embodiment) attached to a housing (for example, a housing 11 in a later-described embodiment) that supports the first and second stators 12A and 12B) in the embodiment. There,
The housing is provided with a knock pin (for example, a knock pin 41 in an embodiment described later) and a bolt hole (for example, a bolt hole 42 in an embodiment described later),
The sensor bracket includes a knock pin insertion hole (for example, a knock pin insertion hole 54 in an embodiment described later) and a fastening bolt (for example, a fastening bolt 43 in an embodiment described later) screwed into the bolt hole. A bracket body (for example, a bracket body 51 in an embodiment described later) having a fastening bolt hole (for example, a fastening bolt hole 55 in an embodiment described later),
A spring portion (for example, a spring portion 52 in an embodiment described later) extending inward from the bracket body and having elasticity in the radial direction;
A sensor holding portion (for example, a sensor holding portion 53 in an embodiment described later) that is provided at the tip of the spring portion and holds a temperature sensor (for example, a temperature sensor 60 in an embodiment described later) that detects the temperature of the coil. And comprising
After the knock pin is fitted into the knock pin insertion hole, the fastening bolt is screwed into the bolt hole so that the fastening bolt penetrates the fastening bolt hole.

  According to invention of Claim 1, the bracket main body which has a knock pin insertion hole and a fastening bolt hole, the spring part extended to an internal diameter side from a bracket main body, and the sensor holding part which is provided in the front-end | tip part of a spring part, and hold | maintains a temperature sensor The temperature sensor can be attached to the stator with high accuracy in both the radial direction and the circumferential direction. Thereby, the temperature of a coil can be detected correctly. Further, since the sensor bracket is held by being engaged with the knock pin during assembly, the position can be maintained until the bolt is tightened, and further, the position is maintained even if the fastening torque reaction force is received during the bolt tightening. be able to.

  According to the invention of claim 2, since the knock pin is press-fitted into the knock pin insertion hole, the position of the bracket body can be more reliably maintained at an appropriate position before the fastening with the fastening bolt. The bracket body is prevented from rotating due to the tightening force, and the sensor bracket can be attached with higher positional accuracy.

  According to the invention of claim 3, since the spring portion is located on the side opposite to the fastening bolt hole with respect to the knock pin insertion hole, the stress at the time of bolt fastening hardly acts, and the temperature sensor has an elastic force of the spring portion. Thus, the coil can be reliably contacted and the temperature of the coil can be accurately detected.

  According to the invention of claim 4, since the bracket body has a harness holding portion for holding the harness extending from the temperature sensor, the harness can be reliably held at a predetermined position and posture, and troubles due to damage to the harness, etc. And the reliability is improved.

  According to the invention of claim 5, since the harness is held by the harness holding portion through the notch formed on the housing side of the spring portion, the harness can be reliably held via a predetermined path. This can improve the reliability by suppressing troubles caused by damage to the harness.

  According to the invention of claim 6, since the sensor bracket is attached to the housing by inserting the knock pin and the fastening bolt into the knock pin insertion hole and the fastening bolt hole of the sensor bracket, respectively, the attachment position of the temperature sensor with respect to the stator is set in the radial direction and It can be attached with high precision in both circumferential directions. Further, since the sensor bracket is held by being engaged with the knock pin during assembly, the position can be maintained until the bolt is tightened, and further, the position is maintained even if the fastening torque reaction force is received during the bolt tightening. be able to.

It is a perspective view of the stator of the rotary electric machine unit of one Embodiment with which the sensor bracket which concerns on this invention is attached. It is a side view of the stator shown in FIG. It is a perspective view of the sensor bracket of one embodiment concerning the present invention. It is a principal part expansion perspective view which shows the state in which a sensor bracket is attached to the housing of a stator. It is a front view which shows the state which attached the sensor bracket shown in FIG. It is A arrow directional view of the sensor bracket shown in FIG. (A) is a perspective view of the conventional sensor bracket, (b) is a side view of the conventional sensor bracket attached to the outer cylinder ring.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  First, the rotating electrical machine unit 10 to which the temperature sensor 60 is attached by the sensor bracket 50 of the present embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIGS. 1 and 2, the rotating electrical machine unit 10 includes a first stator 12A of the first rotating electrical machine 10A that is housed in the housing 11 and arranged to face the axial direction, and a second rotating electrical machine 10B. The second stator 12B. A rotor (not shown) is rotatably arranged inside the first and second stators 12A and 12B. In the present embodiment, the first rotating electrical machine 10A constitutes an electric motor, and the second rotating electrical machine 10B constitutes a generator.

  The first and second stators 12A and 12B include first and second stator cores 13A and 13B in which a plurality of slots 14A and 14B penetrating in the axial direction are arranged at predetermined intervals in the circumferential direction, and slots 14A and 14B. The stator coils 15A, 15B of a plurality of phases (for example, U phase, V phase, W phase) accommodated in the.

  In FIG. 2, the housing 11 includes a left housing 11a, an intermediate housing 11b, and a right housing 11c. The first stator core 13A is fixed to the intermediate housing 11b by inserting bolts 16 through bolt holes 17b provided in a plurality of mounting portions 17a protruding in the radial direction. Further, the second stator core 13B is fixed to the right housing 11c by inserting bolts 16 through bolt holes 17b provided in a plurality of mounting portions 17a that similarly project in the radial direction.

  The first and second rotating electric machines 10A and 10B are segment coil type rotating electric machines that are coils combining rectangular conductors having a rectangular cross section. The stator coils 15A and 15B include a pair of leg portions 21 and both leg portions. A plurality of substantially U-shaped coil segments 20 composed of connecting portions 22 that connect 21 at one end are aligned in one row to form a bundle, and the respective leg portions 21 are inserted into the slots 14A and 14B. The protruding portions of the leg portions 21 protruding from the slots 14A, 14B are formed by bending the corresponding portions by bending them in the circumferential direction. The first and second rotating electrical machines 10A and 10B are arranged such that the coil ends 30A and 30B on the leg 21 side of the stator coils 15A and 15B are opposed to each other.

  The first and second stators 12A and 12B are connected to each phase (U phase, V phase, W phase) of the stator coils 15A and 15B, respectively, and supply power from an external power source. Parts 25A and 25B are arranged.

  The temperature sensors 60 held by the sensor bracket 50 of the present embodiment are arranged in contact with the coil ends 30A and 30B of the stator coils 15A and 15B, respectively, and the temperatures of the coil ends 30A and 30B are measured. The mounting position of the temperature sensor 60 is such that when the cooling oil is dropped from the top of the first and second rotating electrical machines 10A and 10B to cool the stator coils 15A and 15B, the temperature of the stator coils 15A and 15B is likely to increase. It is common to install near the lower part.

  Note that the sensor bracket 50 and the temperature sensor 60 disposed on the stator coils 15A and 15B are the same in structure and mounting method. Therefore, in the following description, the sensor bracket 50 on one side (the first rotating electrical machine 10A side) and The temperature sensor 60 will be described.

  Next, the sensor bracket 50 of this embodiment will be described. As shown in FIG. 3, the sensor bracket 50 of the present embodiment includes a bracket main body 51, a spring portion 52, and a sensor holding portion 53, and is integrally formed by pressing a metal plate. The bracket body 51 is a substantially elliptical flat plate, and is formed with a knock pin insertion hole 54 that fits into a knock pin 41 of the housing 11 described later, and a fastening bolt hole 55 through which the fastening bolt 43 is inserted.

  A harness holding portion 56 that holds a harness 61 extending from the temperature sensor 60 is provided at the end of the bracket body 51 on the side of the knock pin insertion hole 54. The harness holding portion 56 is formed by bending a narrow long plate extending from the bracket main body 51 into a substantially U shape, and can hold and hold the harness 61 at the U shape portion.

  The spring portion 52 is a long plate that is bent in a substantially U shape when viewed from the axial direction of the stator so as to have elasticity, and one end 52a thereof is bent at a right angle with respect to the bracket body 51, The bracket body 51 is continuous with the side surface of the knock pin insertion hole 54 side. In other words, the spring portion 52 is provided at a position opposite to the fastening bolt hole 55 with respect to the knock pin insertion hole 54. A side portion in the width direction of the spring portion 52 is cut out over the entire length of the spring portion 52 to form a cutout 57, and a harness 61 extending from the temperature sensor 60 is routed through the cutout 57.

  The sensor holding portion 53 is provided such that the other end 52b (see FIG. 5) of the spring portion 52 is bent at a right angle in the opposite direction to the bracket body 51, and the temperature of the coil end 30A in the segment conductor type stator coil 15A is set. A temperature sensor 60 for detection is attached.

  The temperature sensor 60 includes, for example, a main body 62 that is a synthetic resin box attached to the sensor holding portion 53, and a thermistor that is housed in the main body 62 and arranged in contact with the coil end 30A of the stator coil 15A. And a warm part 63.

  As shown in FIGS. 4 to 6, the harness 61 led out from the temperature sensing portion 63 is routed through a notch 57 provided on the side surface of the spring portion 52 on the housing 11 side, and provided in the bracket main body 51. After the intermediate portion is held by the harness holding portion 56, the other end of the harness 61 is connected to the connector 64.

Next, a method for attaching the sensor bracket 50 to the housing 11 will be described.
As shown in FIG. 4, knock pins 41 and bolt holes 42 are provided in the axial direction in the intermediate housing 11b and the right housing 11c to which the first and second stators 12A and 12B are fixed, respectively. The sensor bracket 50 is attached by screwing the fastening bolt 43 passed through the fastening bolt hole 55 into the bolt hole 42 after fitting (for example, inlay) or press-fitting the knock pin 41 into the knock pin insertion hole 54.

  Since the sensor bracket 50 is positioned by fitting or press-fitting the knock pin 41 into the knock pin insertion hole 54, the position of the sensor bracket 50 can be maintained at an appropriate position before the fastening by the fastening bolt 43. Tightening work by is easy.

  Further, when the sensor bracket 50 is attached, as shown in FIG. 5, when the fastening bolt 43 is rotated clockwise to fasten the bracket body 51 to the housing 11, the bracket body 51 also rotates clockwise around the fastening bolt 43. The rotational force of However, since the bracket main body 51 is positioned and supported by the knock pin 41 that is fitted or press-fitted into the knock pin insertion hole 54, the position of the bracket main body 51 is shifted even if a rotational force is applied by fastening the fastening bolt 43. There is no. Accordingly, the first and second rotating electrical machines 10A and 10B are positioned with high accuracy not only in the radial direction but also in the circumferential direction.

  As a result, the temperature sensing part 63 of the temperature sensor 60 is placed in contact with the coil ends 30A and 30B of the stator coils 15A and 15B with an appropriate pressing force by the elastic force of the spring part 52, and the temperature of the coil ends 30A and 30B is accurately measured. To measure.

Further, in the conventional bracket 100 shown in FIG. 7, since the bracket 100 is fixed to the outer cylinder ring 110, there is a possibility that the mounting accuracy is reduced due to the accumulated error caused by the presence of the outer cylinder ring 110. Since the sensor bracket 50 of the embodiment is directly fixed to the housing 11, the mounting accuracy can be improved.
Further, in the conventional bracket 100 shown in FIG. 7, the stator core is press-fitted into the outer ring 110 to change the magnetic characteristics, which may cause a motor loss. Since the outer cylinder ring 110 is removed and the bracket 50 is directly fixed to the housing 11, the bracket 50 also has an effect of reducing motor loss without changing magnetic characteristics.

  As described above, according to the sensor bracket 50 according to the present embodiment, the bracket main body 51 having the knock pin insertion hole 54 and the fastening bolt hole 55, the spring portion 52 extending from the bracket main body 51 to the inner diameter side, and the spring portion 52. And a sensor holding portion 53 that holds the temperature sensor 60, so that the mounting position of the temperature sensor 60 with respect to the first and second stators 12A and 12B is highly accurate in both the radial direction and the circumferential direction. It can be attached with. Thereby, the temperature of coil end 30A, 30B can be detected correctly. In addition, since the sensor bracket 50 is fitted and held with the knock pin 41 at the time of assembly, the position can be maintained until the bolt is fastened. Can be maintained.

  Further, by inserting the knock pin 41 into the knock pin insertion hole 54, the position of the bracket body 51 can be more reliably maintained at an appropriate position before the fastening bolt 43 is fastened, and further acts when the fastening bolt 43 is fastened. The bracket body 51 is prevented from rotating by the rotational force, and the sensor bracket 50 can be attached with higher positional accuracy.

  In addition, since the spring portion 52 is located on the side opposite to the fastening bolt hole 55 with respect to the knock pin insertion hole 54, the stress at the time of bolt fastening is difficult to act, and the temperature sensor 60 is surely secured by the elastic force of the spring portion 52. The coil ends 30A and 30B are contacted with each other, and the temperatures of the coil ends 30A and 30B can be accurately detected.

  Moreover, since the bracket main body 51 has the harness holding part 56 which holds the harness 61 extended from the temperature sensor 60, the harness 61 can be reliably hold | maintained with a predetermined attitude | position, and the trouble by the damage of the harness 61 etc. is suppressed. Can improve reliability.

  Further, the spring portion 52 of the sensor bracket 50 includes a notch 57 formed on the housing 11 side, and the harness 61 is held by the harness holding portion 56 through the notch 57. It can hold | maintain via a path | route, the trouble by damage of the harness 61 etc. is suppressed and reliability improves.

  Further, according to the sensor bracket mounting method of the present embodiment, the knock pin 41 and the fastening bolt 43 are inserted into the knock pin insertion hole 54 and the fastening bolt hole 55 of the sensor bracket 50, respectively, and the sensor bracket 50 is attached to the housing 11. Therefore, the attachment position of the temperature sensor 60 with respect to the first and second stators 12A and 12B can be attached with high accuracy in both the radial direction and the circumferential direction.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, in the present embodiment, a rotating electrical machine unit including a pair of rotating electrical machines has been described as an example, but the present invention can also be applied to a single rotating electrical machine.

11 Housing 12A, 12B Stator 13A, 13B Stator core 15A, 15B Stator coil (segment conductor type coil)
30A, 30B Coil end 41 Knock pin 42 Bolt hole 43 Fastening bolt 50 Sensor bracket 51 Bracket main body 52 Spring portion 53 Sensor holding portion 54 Knock pin insertion hole 55 Fastening bolt hole 56 Harness holding portion 57 Notch 60 Temperature sensor 61 Harness

Claims (6)

A sensor bracket attached to a housing that supports a stator comprising a stator core and a coil that combines a rectangular conductor,
A bracket body having a knock pin insertion hole for fitting with a knock pin provided in the housing, and a fastening bolt hole through which a fastening bolt screwed into a bolt hole provided in the housing passes,
A spring portion extending from the bracket body toward the inner diameter side and having elasticity in the radial direction;
A sensor bracket, comprising: a sensor holding portion that is provided at a distal end portion of the spring portion and holds a temperature sensor that detects a temperature of the coil.   The sensor bracket according to claim 1, wherein the knock pin is press-fitted into the knock pin insertion hole.   3. The sensor bracket according to claim 1, wherein the spring portion is located on a side opposite to the fastening bolt hole with respect to the knock pin insertion hole.   The sensor bracket according to claim 1, wherein the bracket body has a harness holding portion that holds a harness extending from the temperature sensor. The spring portion has a substantially U shape when viewed from the axial direction of the stator,
The sensor according to claim 4, wherein the spring portion is formed with a notch on the housing side, and the harness is configured to be able to be held by the harness holding portion through the notch. bracket. A mounting method of a sensor bracket attached to a housing that supports a stator including a stator core and a coil that combines a rectangular conductor,
The housing is provided with knock pins and bolt holes,
The sensor bracket includes a bracket body having a knock pin insertion hole that fits into the knock pin, and a fastening bolt hole through which a fastening bolt that is screwed into the bolt hole passes.
A spring portion extending from the bracket body toward the inner diameter side and having elasticity in the radial direction;
A sensor holding part that is provided at the tip of the spring part and holds a temperature sensor that detects the temperature of the coil;
A method of attaching a sensor bracket, wherein the fastening bolt is screwed into the bolt hole so that the fastening bolt penetrates the fastening bolt hole after the knock pin is fitted into the knock pin insertion hole.

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