Resolver

Abstract

To provide a resolver which can prevent damage to a coupling portion between a connector housing and an insulator, and can also prevent loosening of connector pins.SOLUTION: An insulator includes a first insulator 31 and a second insulator 32 which are fitted on both sides in the axial direction of a stator core 21. A terminal block part 31e is provided at a position, on the insulator, traversing a portion of a core back part 21a of the stator core. A plurality of resin pins 31g are formed on the outer periphery of a first insulator-side terminal block part. The resin pins are inserted into resin pin through-holes 33e on a second insulator-side terminal block part 33d so that the first insulator-side terminal block part may be coupled to the second insulator-side terminal block part or a terminal pin cover 34 via the resin pins. A plurality of terminal pins are implanted into the first insulator-side terminal block part. Each of the terminal pins has a protrusion at a position to be press-fitted into each of the terminal pin through-holes on the second insulator-side terminal block part.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a resolver which is a sensor for detecting the rotation angle of a rotating electrical machine.

Background Art

[0002] A resolver is used as a sensor for detecting the rotation angle of the rotating shaft of a rotating electrical machine such as a motor or a generator which is an electric motor.

[0003] Conventionally, in a resolver for detecting the rotation angle of the rotating shaft of a rotating electrical machine, a resolver is known in which a connector housing is integrally formed with an insulator that insulates between the teeth of a stator core and a stator winding (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional resolver, when the external connector is inserted and removed, stress concentration occurs at the joint portion between the connector housing and the insulator, and there is a risk that the joint portion may be damaged. Further, since the connector pins are formed from straight shaft portions, when the external connector is inserted and removed, there is a risk that the connector pins may become loose, and there is a risk that the end wires of the stator winding wound around the connector pins may be pulled and broken.

[0006] The present invention has been made in view of the above, and an object thereof is to provide a resolver in which damage to the joint portion between the connector housing and the insulator is prevented and loosening of the connector pins is prevented.

Means for Solving the Problems

[0007] In order to solve the above-described problems and achieve the object, a resolver according to an aspect of the present invention includes a stator composed of a stator core having a plurality of teeth and a stator winding wound around the teeth via an insulator, and a rotor disposed inside the plurality of teeth. The insulator includes a first insulator and a second insulator attached to both axial ends of the stator core. A terminal block portion is provided at a position where the insulator covers a part of the core back portion of the stator core. A plurality of resin pins are formed on the outer peripheral side of the terminal block portion on the first insulator side, and the resin pins are inserted into through holes for resin pins of the terminal block portion on the second insulator side, and the first insulator side terminal block portion and the second insulator side terminal block portion or the terminal pin cover are coupled by the resin pins. A plurality of terminal pins are implanted in the terminal block portion on the first insulator side, and each of the terminal pins has a protrusion at a position where it is press-fitted into a through hole for a terminal pin of the terminal block portion on the second insulator side.

[0008] A resolver according to an aspect of the present invention prevents damage to the connection portion between the connector housing and the insulator and also prevents loosening of the connector pins.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0010] Hereinafter, the resolver according to the embodiment will be described with reference to the drawings. Note that the present invention is not limited by this embodiment. Also, the dimensional relationships of the elements in the drawings, the ratios of the elements, etc. may be different from reality. There may also be parts where the dimensional relationships and ratios of each other are different between the drawings. In addition, the content described in one embodiment or modification example is generally applicable to other embodiments and modification examples as well.

[0011] FIG. 1 is a plan view of a resolver 10 according to an embodiment. FIG. 2 is a perspective view of the resolver 10 of FIG. 1. However, the rotor 36 is omitted. FIG. 3 is an exploded perspective view of the main part of the resolver 10 of FIGS. 1 and 2. However, the illustration of the stator winding 35 and the rotor 36 is omitted.

[0012] In FIGS. 1 to 3, the resolver 10 of the present embodiment is a variable reluctance (VR) type resolver. The resolver 10 includes a stator 20 and a rotor 36 disposed inside the stator 20. The stator 20 includes a stator core 21, a first insulator 31 and a second insulator 33 attached to the stator core 21, a stator winding 35 wound around the teeth 21e of the stator core 21 via the first insulator 31 and the second insulator 33, and a terminal pin cover 34. The rotor 36 disposed inside the stator 20 is fixed to the shaft of a motor (not shown) which is a rotating electric machine.

[0013] The rotor 36 is composed of a core made of magnetic steel plates (electromagnetic steel plates) stacked in a predetermined number in the axial direction. The core has a non-circular shape with a plurality of convex portions 36a protruding outward in the radial direction. In the figure, the case where the axial multiple angle of the rotor 36 is 2X (two convex portions 36a) is shown. A key groove 36b for accommodating a key inserted to prevent rotation of the shaft of a motor (not shown) is formed on the inner peripheral surface of the rotor 36. Instead of the key groove 36b, a convex portion protruding radially from the inner peripheral surface may be used.

[0014] The stator core 21 is composed of a core made of magnetic steel plates (electromagnetic steel plates) stacked in a predetermined number in the axial direction. The core has a plurality of teeth 21e extending radially inward from the inner peripheral edge of the annular core back portion 21a, and the teeth 21e are arranged at equal intervals in the circumferential direction. A plurality of arc-shaped long holes 21b are formed in the circumferential direction in the annular core back portion 21a, and semi-circular notches 21d are respectively formed on the outer peripheral edge of the core back portion 21a so as to be located between adjacent long holes 21b. Also, a plurality of circular through holes 21c are formed evenly in the circumferential direction in the region between the long holes 21b and the teeth 21e. These circular through holes 21c are used for inserting a slack forming pin (not shown) for forming slack in the end wire when the end wire of the stator winding 35 is wound and connected to the terminal pin 32.

[0015] The first insulator 31 is formed by injection molding of an insulating resin. The first insulator 31 has a plurality of extending portions 31b extending radially inward from the inner peripheral edge of the annular portion 31a integrally formed with the annular portion 31a, and flanges 31c are formed at the tips of the respective extending portions 31b. A terminal base portion 31e extending radially outward from the outer peripheral edge is integrally formed with the annular portion 31a at a part of the annular portion 31a. Two resin pins 31g protruding to one side in the axial direction are formed on the terminal base portion 31e, and these resin pins 31g are inserted into two resin pin through holes 33e formed in the terminal base portion 33d of the second insulator 33 and two resin pin through holes 34a formed in the terminal pin cover 34.

[0016] On the terminal block portion 31e of the first insulator 31, a connector housing 31i protruding toward the other axial direction is integrally formed with the terminal block portion 31e. Further, six terminal pins 32 are arranged on the terminal block portion 31e. One side of the terminal pin 32 protrudes axially on one side from the terminal block portion 31e, and the other side of the terminal pin 32 protrudes axially on the other side from the terminal block portion 31e and is arranged inside the connector housing 31i, functioning as a connector pin. This terminal pin 32 is inserted, and the first insulator 31, the terminal block portion 31e, and the connector housing 31i are simultaneously formed by injection molding. One side of the terminal pin 32 is press-fitted into a plurality of through-holes 33f (six through-holes) for terminal pins formed in the second insulator 33.

[0017] FIG. 4 is a cross-sectional view of the portion where the terminal pin 32 is arranged. FIG. 5 is a perspective view of only the terminal pin 32. FIG. 6 is an enlarged cross-sectional view near the root of the entangled connection side portion 32b of the terminal pin 32.

[0018] In FIGS. 4 to 6, the terminal pin 32 is formed of a conductive metal material. Near the root of each one side (the entangled connection side portion 32b side) of the terminal pin 32 press-fitted into the through-hole 33f for terminal pins formed in the second insulator 33, a protrusion 32d is formed to increase the holding strength when press-fitted. In the illustrated example, the shape of the protrusion 32d formed on the terminal pin 32 is formed in a quadrangular pyramid shape, but it is not limited thereto. In a plan view from the axial direction, for example, it may have a shape protruding in a direction orthogonal to the axis like a cross shape. Further, in the illustrated example, there is one protrusion 32d, but a plurality of protrusions may be formed in the axial direction. FIG. 7 is an enlarged cross-sectional view near the root of the entangled connection side portion 32b showing another example of the terminal pin 32. Near the root of each one side (the entangled connection side portion 32b) of the terminal pin 32 press-fitted into the through-hole 33f for terminal pins formed in the second insulator 33, a first protrusion 32e and a second protrusion 32f are provided.

[0019] In FIG. 4, the terminal pins 32 are arranged on both sides such that the pitch P2 between the terminal pins on the one end side (the side of the winding connection portion 32b) that is press-fitted into the through-holes 33f for terminal pins of the terminal block portion 33d of the second insulator 33 is larger than the pitch P1 between the terminal pins on the other side (the side of the connector pin portion 32a) that functions as a connector pin. By bending the terminal pins 32 arranged on both sides at the intermediate bent portion 32c in the pin arrangement direction, the pitch P2 between the terminal pins is ensured. The pitch P1 between the terminal pins on the other side (the side of the connector pin portion 32a) of the terminal pins 32 is matched to the pitch of the external connector in order to function as a connector pin. If the pitch P2 between the terminal pins on the one side (the side of the winding connection portion 32b) of the terminal pins 32 is the same as the pitch P1 between the terminal pins on the other side, the pitch between the terminal pins becomes smaller (narrow pitch). As a result, the through-holes 33f for terminal pins formed in the terminal block portion 33d of the second insulator 33 approach each other. When the terminal pins 32 are press-fitted into the through-holes 33f for terminal pins, there is a risk that the electrical insulation between adjacent terminal pins 32 may deteriorate due to cracks occurring in the insulating resin between adjacent through-holes 33f for terminal pins. In some cases, the insulating resin between adjacent through-holes 33f for terminal pins may be damaged and the shape of the through-holes 33f for terminal pins cannot be maintained, resulting in a risk of a decrease in the holding force of the terminal pins 32. However, since the pitch P2 between the terminal pins is larger than the pitch P1 between the terminal pins, the portion of the through-holes 33f for terminal pins in the terminal block portion 33d will not be crushed when the terminal pins 32 are press-fitted, and there is no risk of a decrease in the holding force.

[0020] Also, increasing the pitch P2 between the terminal pins on the winding connection side has the advantage of facilitating the winding operation. Furthermore, by providing the intermediate bent portion 32c in the terminal pins 32, the terminal pins 32 will not loosen from the terminal block portion 31e of the first insulator 31 formed by insert molding.

[0021] In FIGS. 1 to 6, the second insulator 33 is formed by injection molding of an insulating resin. The second insulator 33 has a plurality of extending portions 33b extending radially inward from the inner peripheral edge of the annular portion 33a integrally formed with the annular portion 33a, and flanges 33c are formed at the tips of the respective extending portions 33b. A terminal base portion 33d extending radially outward from the outer peripheral edge is integrally formed with a part of the annular portion 33a. In the terminal base portion 33d, a plurality of through holes 33f (six in the figure) for press-fitting the terminal pins 32 on the side of the first insulator 31 and a plurality of through holes 33e (two in the figure) for inserting the resin pins 31g are formed.

[0022] When the first insulator 31 is mounted on one axial side of the stator core 21, each extending portion 31b of the first insulator 31 covers one axial side of each tooth 21e of the stator core 21, and a protrusion 31f formed in substantially the same shape as the arc-shaped long hole 21b formed in the stator core 21 is fitted into the arc-shaped long hole 21b of the stator core 21 at the terminal base portion 31e of the first insulator 31.

[0023] When the second insulator 33 is mounted on the other axial side of the stator core 21, each extending portion 33b of the second insulator 33 covers the other axial side of each tooth 21e of the stator core 21. One side of the terminal pin 32 embedded in the terminal base portion 31e of the first insulator 31 is press-fitted and held in each through hole 33f for terminal pins formed in the terminal base portion 33d of the second insulator 33. Further, the resin pins 31g formed in the terminal base portion 31e of the first insulator 31 are inserted into the through holes 33e for resin pins formed in the terminal base portion 33d of the second insulator 33, respectively.

[0024] Each tooth 21e of the stator core 21 has a stator winding 35 wound therearound via extending portions 31b and 33b of a first insulator 31 and a second insulator 33. The stator winding 35 is composed of an exciting winding and an output winding. The output winding is composed of a sin-phase output winding that outputs a sin-phase signal and a cos-phase output winding that outputs a cos-phase signal having a 90° phase difference from the sin signal. Each end wire of the exciting winding and the output winding is electrically connected to one side of a terminal pin 32 protruding axially from a terminal block portion 33d of the second insulator 33. When the end wires of the stator winding 35 are wound and connected to the terminal pin 32, a slack forming pin (not shown) inserted into a circular through hole 21c of the stator core 21 serves as a guide, and the end wires of the stator winding 35 are wound and connected to the terminal pin 32. Then, after the winding connection, the slack forming pin (not shown) is removed from the stator core 21, so that slack is formed in each end wire of the stator winding 35.

[0025] After each end wire of the exciting winding and the output winding of the stator winding 35 is electrically connected to one side of the terminal pin 32, a terminal pin cover 34 formed of a resin material is attached. The terminal pin cover 34 is formed with a resin pin through hole 34a for inserting a resin pin 31g protruding axially from a resin pin through hole 33e of the terminal block portion 33d of the second insulator 33. The tip 31h of the resin pin 31g protruding axially from the resin pin through hole 34a of the terminal pin cover 34 is heated and plastically deformed (to form a plastically deformed portion), and the first insulator 31, the second insulator 33, and the terminal pin cover 34 are joined. When the terminal pin cover 34 is attached, the terminal pin 32 to which each end wire of the exciting winding and the output winding of the stator winding 35 is connected is accommodated in the accommodation space of the terminal pin cover 34. As a result, damage due to contact of the terminal pin 32 with the outside and short circuit due to contact of a foreign object from the outside with the terminal pin 32 are prevented.

[0026] (Characteristic configuration) In FIGS. 1 to 6, when the first insulator 31 and the second insulator 33 are attached to the stator core 21, a plurality of terminal pins 32 arranged on the first insulator 31 pass through the arc-shaped long holes 21b of the stator core 21 and are press-fitted into the terminal pin through-holes 33f of the terminal block portion 33d integrally formed on the second insulator 33. At the same time, a plurality of resin pins 31g formed on the terminal block portion 31e integrally formed on the first insulator 31 are respectively inserted into the resin pin through-holes 33e formed in the terminal block portion 33d of the second insulator 33. Protrusions 32d are formed on the terminal pins 32 to improve the holding strength when press-fitted. Therefore, when the terminal pins 32 are press-fitted, the terminal pins 32 are firmly held by the terminal block portion 33d of the second insulator 33.

[0027] The terminal pins 32 press-fitted into the terminal block portion 33d of the second insulator 33 protrude axially from the terminal block portion 33d, and the tips 31h of the resin pins 31g also protrude axially from the terminal block portion 33d of the second insulator 33.

[0028] The terminals of the stator winding 35 wound around each tooth 21e of the stator core 21 via the first insulator 31 and the second insulator 33 are wound and connected to predetermined terminal pins 32 and are electrically connected, for example, by TIG (Tungsten Inert Gas) welding.

[0029] The resin pins 31g protruding from the terminal block portion 33d of the second insulator 33 are inserted into the resin pin through-holes 34a formed in the terminal pin cover 34, and the tips 31h of the resin pins 31g protruding from the terminal pin cover 34 are heated and plastically deformed (to become a plastically deformed portion) and fixed. As a result, the terminal block portions 31e and 33d of the first insulator 31 and the second insulator 33 are joined at the outer peripheral edge by the terminal pin cover 34.

[0030] On the terminal pin 32 disposed on the terminal block portion 31e of the first insulator 31, a protrusion 32d is formed to improve the holding strength. When the terminal pin 32 is press-fitted into the terminal block portion 33d of the second insulator 33, the terminal pin 32 is firmly held by the terminal block portion 33d. As a result, loosening of the terminal pin 32 is prevented even by plugging and unplugging of the connector, and disconnection at the entangled connection portion is prevented.

[0031] The tip 31h of the resin pin 31g protruding from the resin pin through-hole 34a of the terminal pin cover 34 is heated and plastically deformed (to become a plastically deformed portion) and fixed. As a result, the terminal block portions 31e and 33d of the first insulator 31 and the second insulator 33 are joined at their outer peripheral edges. For this reason, the first insulator 31 and the second insulator 33 are joined by the stator winding 35 wound around each tooth 21e on the inner peripheral side and are joined by the resin pin 31g on the outer peripheral side. In this way, since the insulators (the first insulator 31 and the second insulator 33) are joined on the inner peripheral side and the outer peripheral side, damage at the joining portion between the annular portion 31a of the first insulator 31 and the terminal block portion 31e formed by the connector housing 31i is prevented even by plugging and unplugging of the external connector.

[0032] (Modification) In the above embodiment, the resin pin 31g formed on the terminal block portion 31e of the first insulator 31 passes through the resin pin through-hole 33e formed on the terminal block portion 33d of the second insulator 33 and the resin pin through-hole 34a formed on the terminal pin cover 34, and the tip 31h of the resin pin 31g protruding from the resin pin through-hole 34a of the terminal pin cover 34 is heated and plastically deformed (to become a plastically deformed portion) and joined. However, the present invention is not limited to this, and the following configuration may also be used.

[0033] Specifically, the resin pin 31g formed on the terminal block portion 31e of the first insulator 31 is inserted through the resin pin through-hole 33e formed on the terminal block portion 33d of the second insulator 33. After the tip 31h of the resin pin 31g protruding from the resin pin through-hole 33e of the terminal block portion 33d of the second insulator 33 is heated and plastically deformed (becoming a plastically deformed portion), and the terminal block portions 31e and 33d of the first insulator 31 and the second insulator 33 are joined together, the terminal pin cover 34 may be joined (including engagement, fixing, welding, etc.) to the terminal block portion 33d of the second insulator 33.

[0034] (Others) The circular through-hole 21c formed in the stator core 21 is formed for inserting a slack forming pin for forming slack in the end wire of the stator winding 35. However, when a means for forming slack is used without using this circular through-hole 21c when slack is formed in the end wire of the stator winding 35, this circular through-hole 21c may not be formed.

[0035] Also, the shaft multiple angle of the rotor 36 is not limited to 2X shown in the figure. Also, the number of teeth 21e of the stator core 21 is not limited to that shown in the figure.

[0036] (Comparative Example) FIG. 8 is a plan view of the resolver 10' of the comparative example (Patent Document 1), and FIG. 9 is a cross-sectional view of the resolver 10' of the comparative example. In FIGS. 8 and 9, in the resolver 10', a plurality of protruding magnetic poles 2' protruding inward at predetermined angular intervals are formed on the inner surface 10Ba' of the ring-shaped stator 10B' (so-called stator core), and the stator winding 4' is wound around each protruding magnetic pole 2' via a ring-shaped insulating cover member 3' (so-called insulator) configured integrally or separately.

[0037] In the through hole 20' formed in the ring-shaped stator 10B', a cylindrical resolver connector 21' (so-called connector housing) having a cylindrical shape is attached in a penetrating state, and a plurality of connector pins 22' for winding the end wires of the stator winding 4' are arranged in the cylindrical resolver connector 21'. The cylindrical resolver connector 21' is configured integrally with the ring-shaped insulating cover member 3' or as an independent separate body.

[0038] In the comparative example, the stator winding 4' is wound around the protruding magnetic pole 2' via the ring-shaped insulating cover member 3', but the ring-shaped insulating cover member 3' is formed separately and may be attached to the stator core from both axial sides of the ring-shaped stator 10B' (modification example).

[0039] In the resolver 10' of the comparative example, when the stator winding 4' is wound via the ring-shaped insulating cover member 3' configured separately, the cylindrical resolver connector 21' attached in a state of penetrating the through hole 20' formed in the ring-shaped stator 10B' is usually formed by integral molding with the ring-shaped insulating cover member 3' on the side where the cylindrical resolver connector 21' is arranged.

[0040] In this case, one end of each of the plurality of connector pins 22' arranged in the cylindrical resolver connector 21' functions as a connector pin, and the end wire of the stator winding 4' is wound and connected to the other end. When the external connector connected to the connector pin 22' is inserted and removed, stress concentration occurs at the joint between the cylindrical resolver connector 21' and the ring-shaped insulating cover member 3', and there is a risk of damage to the joint.

[0041] Further, the connector pins 22' are arranged by insert molding in the cylindrical resolver connector 21'. However, since the connector pins 22' are composed of straight shaft portions, there is a risk that the connector pins 22' will loosen when the external connector is inserted and removed. When the cylindrical resolver connector 21' and the connector pins 22' are pulled by the insertion and removal of the connector, the end wires of the stator winding 4' wound around the connector pins 22' are pulled, and there is a risk of disconnection.

[0042] In addition, in FIGS. 8 and 9, reference numeral 3a’ denotes the outer circumference, reference numeral 10D’ denotes the outer edge portion, reference numeral 11’ denotes the annular seal member, reference numeral 14’ denotes the rotor, reference numeral 14A’ denotes the shaft hole, reference numeral 20A’ denotes the mounting through hole, and reference numeral 21B’ denotes the outer circumference.

[0043] As described above, in the comparative example and its modification, when the external connector was inserted and removed, stress concentrated at the joint portion between the connector housing and the insulator, and there was a risk that the joint portion would be damaged. Further, since the connector pins were formed from straight shaft portions, when the external connector was inserted and removed, there was a risk that the connector pins would loosen, and there was a risk that the end wires of the stator winding wound around the connector pins would be pulled and broken.

[0044] In this regard, according to the embodiments of FIGS. 1 to 7 described above, the terminal block portion 31e of the first insulator 31 in which the connector housing 31i is integrally provided, together with the terminal block portion 33d of the second insulator 33, is fixed by the stator winding 35 on the inner peripheral side and is fixed by the resin pins 31g on the outer peripheral side. Therefore, stress does not concentrate on the joint portion between the connector housing 31i and the first insulator 31, and there is almost no risk that the joint portion will be damaged.

[0045] Further, since the terminal pins 32 press-fitted into the through holes 33f for the terminal pins of the second insulator 33 are provided with protrusions 32d, there is almost no risk that the terminal pins 32 will loosen when the external connector is inserted and removed.

[0046] As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit thereof.

[0047] As described above, the resolver according to the embodiment includes a stator core having a plurality of teeth extending radially inward from the inner peripheral edge of an annular core back portion and arranged in the circumferential direction, and stator windings wound around each of the plurality of teeth via an insulator, and a stator composed of the stator windings, and a rotor rotatably disposed inside the plurality of teeth with respect to the stator. The resolver includes a terminal pin cover that covers a plurality of terminal pins provided on a terminal block portion formed at a position that crosses and covers a part of the core back portion of the insulator. The insulator includes a first insulator mounted on one axial side of the stator core and a second insulator mounted on the other axial side of the stator core. The first insulator has a first insulator-side terminal block portion extending in the radial direction integrally formed thereon, a connector housing integrally formed at one axial end side of the first insulator-side terminal block portion, a plurality of resin pins formed at the other axial end side on the outer peripheral side of the first insulator-side terminal block portion, and one ends of the plurality of terminal pins implanted in the first insulator-side terminal block portion are disposed inside the connector housing. The second insulator has a second insulator-side terminal block portion extending in the radial direction integrally formed thereon, and a plurality of through holes for terminal pins into which the plurality of terminal pins are press-fitted and a plurality of through holes for resin pins through which the plurality of resin pins are inserted are formed in the second insulator-side terminal block portion. The first insulator-side terminal block portion and the second insulator-side terminal block portion or the terminal pin cover are coupled by the plurality of resin pins. Each of the plurality of terminal pins has a protrusion at a position where it is press-fitted into the through hole for the terminal pin of the second insulator-side terminal block portion. Each of the plurality of terminal pins is press-fitted into the through hole for the terminal pin of the second insulator-side terminal block portion. Thereby, breakage of the coupling portion between the connector housing and the insulator is prevented, and loosening of the connector pins is prevented.

[0048] Further, one or more protrusions are provided for each terminal pin. Thereby, adjustment of the holding force becomes easy, and the holding force is increased as the number of protrusions increases.

[0049] Also, the first insulator side terminal block portion and the second insulator side terminal block portion are coupled by a plastic deformation portion at the tip of a resin pin protruding axially from the second insulator side terminal block portion. Thereby, the coupling between the first insulator side terminal block portion and the second insulator side terminal block portion is easily realized.

[0050] Further, the terminal pin cover has a plurality of through holes for resin pins through which a plurality of resin pins are inserted, and the first insulator terminal block portion, the second insulator terminal block portion, and the terminal pin cover are coupled by plastic deformation portions at the tips of the plurality of resin pins protruding axially from the through holes for resin pins of the terminal pin cover. Thereby, the coupling between the terminal block portion of the first insulator, the terminal block portion of the second insulator, and the terminal pin cover is easily realized.

[0051] Also, the terminal pin has a bent portion in a portion embedded in the first insulator, and the pitch of the terminal pins protruding from the terminal block portion of the second insulator is larger than the pitch of the terminal pins arranged inside the connector housing. Thereby, while matching the pitch of the external connector, prevention of a decrease in the holding force on the press-fitting side and the like are achieved.

[0052] Also, the present invention is not limited by the above-described embodiment. Those configured by appropriately combining the above-described components are also included in the present invention. Further, additional effects and modification examples can be easily derived by those skilled in the art. Therefore, a broader aspect of the present invention is not limited to the above-described embodiment, and various modifications are possible.

Description of Reference Numerals

[0053] 10 resolver, 20 stator, 21 stator core, 21a core back portion, 21b long hole, 21c through hole, 21d notch, 21e teeth, 31 first insulator, 31a annular portion, 31b extending portion, 31c flange, 31d through hole, 31e terminal block portion, 31f protrusion, 31g resin pin, 31h tip, 31i connector housing, 32 terminal pin, 32a connector pin side portion, 32b winding connection side portion, 32c bent portion, 32d protrusion, 32e first protrusion, 32f second protrusion, 33 second insulator, 33a annular portion, 33b extending portion, 33c flange, 33d terminal block portion, 33e resin pin through hole, 33f terminal pin through hole, 34 terminal pin cover, 34a resin pin through hole, 35 stator winding, 36 rotor, 36a convex portion, 36b key groove, P1, P2 pitch between terminal pins

Claims

1. A stator composed of a stator core having a plurality of teeth extending radially inward from the inner peripheral edge of an annular core back portion and arranged in the circumferential direction, and stator windings wound around each of the plurality of teeth via an insulator; A rotor rotatably disposed with respect to the stator inside the plurality of teeth; A resolver comprising: A terminal pin cover covering a plurality of terminal pins provided on a terminal block portion formed at a position crossing and covering a part of the core back portion of the insulator; The insulator includes a first insulator mounted on one axial side of the stator core and a second insulator mounted on the other axial side of the stator core; The first insulator is integrally formed with a first insulator-side terminal block portion extending in the radial direction, a connector housing is integrally formed at one axial end side of the first insulator-side terminal block portion, a plurality of resin pins are formed at the other axial end side on the outer peripheral side of the first insulator-side terminal block portion, and one ends of the plurality of terminal pins implanted in the first insulator-side terminal block portion are disposed inside the connector housing; The second insulator is integrally formed with a second insulator-side terminal block portion extending in the radial direction, and a plurality of through holes for terminal pins into which the plurality of terminal pins are press-fitted and a plurality of through holes for resin pins through which the plurality of resin pins are inserted are formed in the second insulator-side terminal block portion; The first insulator-side terminal block portion and the second insulator-side terminal block portion or the terminal pin cover are coupled by the plurality of resin pins; Each of the plurality of terminal pins has a protrusion at a position where it is press-fitted into the through hole for the terminal pin of the second insulator-side terminal block portion, and each of the plurality of terminal pins is press-fitted into the through hole for the terminal pin of the second insulator-side terminal block portion; A resolver.

2. One or more protrusions are provided for each of the terminal pins; The resolver according to claim 1.

3. The first insulator side terminal block portion and the second insulator side terminal block portion are coupled by a plastic deformation portion at the tip of the resin pin protruding axially from the second insulator side terminal block portion. The resolver according to claim 1 or 2.

4. The terminal pin cover is formed with a plurality of through holes for resin pins through which the plurality of resin pins are inserted. The first insulator terminal block portion, the second insulator terminal block portion, and the terminal pin cover are coupled by plastic deformation portions at the tips of the plurality of resin pins protruding axially from the through holes for resin pins of the terminal pin cover. The resolver according to claim 1 or 2.

5. The terminal pin has a bent portion in a portion embedded in the first insulator. The pitch of the terminal pins protruding from the terminal block portion of the second insulator is larger than the pitch of the terminal pins arranged inside the connector housing. The resolver according to any one of claims 1 to 4.

Images