JP2019180136A - motor - Google Patents

Abstract

To provide a motor capable of suppressing inflow of a resin into an inner side of a cover when covering the cover with a resin sealing body.SOLUTION: In a motor 1, a cover 60 seals an opening part 111 of a motor case 10 as well as a terminal stage 45. A projection part 63 for preventing inflow of a region of the cover 60 covers a part positioned on a first end part 81 side from a middle part of a first direction X from a part positioned in a groove 456 of the terminal stage 45 in a terminal pin 80. A part exposed from the projection part 63 in the terminal pin 80 is sealed with a sealing resin body 70 excluding a neighborhood of a second end part 82. The projection part 63 includes: a first plate part 66 covered with a second end surface 450; and a plurality of second plate parts 67 projected from the first plate part 66, and fitted an inner part of each of a plurality of grooves 456. Therefore, a resin hardly enters into the side where a first end part 81 is positioned through each groove 456 when forming the sealing resin body 70 by a resin mold.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a motor provided with a cover that covers one end of a terminal pin held by a terminal block.

  As a motor with improved airtightness of the motor case covering the rotor and stator, resin molding is performed with the terminal block holding the plurality of terminal pins and the cover covering the terminal pins closed with the motor case opening. There has been proposed a structure in which a sealing resin body that covers the sides of the base, the cover, and the motor case is provided (see Patent Document 1). In the motor described in Patent Document 1, the terminal pin is held in a groove formed in the terminal block, and the cover is provided so as to cover the entire portion located in the groove of the terminal pin.

JP 2008-113495 A

  However, simply covering the end of the terminal pin for connecting the coil with the configuration described in Patent Document 1 causes the resin to flow into the inside of the cover when the resin sealing body is molded, and the coil wire is pressed by the pressure at that time. There are problems such as cutting.

  In view of the above problems, an object of the present invention is to provide a motor capable of suppressing the inflow of resin to the inside of a cover when the cover is covered with a resin sealing body.

  In order to solve the above problems, a motor according to one aspect of the present invention includes a rotor including a permanent magnet, a stator facing the permanent magnet, the rotor and the stator, and an end on one side in the axial direction. A motor case in which an end plate portion is provided on a portion, and a plurality of grooves that are disposed on the other side in the axial direction of the motor case and extend in a first direction on the other end surface in the axial direction, A terminal block formed so as to be parallel to an axial direction and a second direction orthogonal to the first direction, and a coil wire held inside each of the plurality of grooves and being one end in the first direction A first end for connection and a second end for external connection, which is the other end, respectively, are a plurality of terminal pins protruding from different first side surfaces and second side surfaces of the terminal block, and the first end portion Arranged to cover the motor case A cover for closing the opening that opens toward the other side in the axial direction together with the terminal block; and a cover for covering the terminal block and the cover from the other side in the axial direction to cover the side surface of the motor case; A sealing resin body having a wall surface from which the second end protrudes, and the cover has a body part facing the first side surface and in contact with an opening edge of the motor case; and the body part A protruding portion for preventing resin inflow from projecting from the other side of the axial direction to the terminal block, and the protruding portion overlaps the end surface from the first plate portion and the first plate portion A plurality of second plate portions projecting to one side in the axial direction and fitted inside each of the plurality of grooves.

In the present invention, the cover has a protruding portion for preventing resin inflow covering the terminal block from the other side in the axial direction, and the protruding portion has an axis line extending from the first plate portion and the first plate portion overlapping the end surface of the terminal block. A plurality of second plate portions that protrude in one direction and fit into each of the plurality of grooves. For this reason, when forming the sealing resin body by the resin mold, the resin hardly flows into the inside of the cover where the first end portion is located through the groove.

  In the present invention, the cover projects radially inward from the position where the end of the motor case abuts in the body portion, and abuts on the inner peripheral surface of the motor case from the radially inner side. The aspect which has a 1st convex part is employable. According to this aspect, it is easy to arrange the cover so as to close the opening of the motor case.

  In the present invention, the terminal block includes an arc-shaped step portion that comes into contact with the inner peripheral surface from the inside in the radial direction, and the first convex portion is fitted in a circumferentially interrupted portion of the step portion. A mode in which the peripheral surface is in contact with the inner surface in the radial direction can be employed.

  In the present invention, it is possible to adopt a mode in which a concave portion in which the first end portion is located inside is formed on a surface of the body portion that faces the terminal block. In the present invention, it is possible to adopt a mode in which a partition wall that partitions terminal pins adjacent to each other in the second direction among the plurality of terminal pins is provided in the concave portion.

  In the present invention, it is possible to adopt a mode in which a partition wall that partitions terminal pins adjacent to each other in the second direction among the plurality of terminal pins is provided in the concave portion.

  In the present invention, the cover has a second convex portion that protrudes from the body portion at a position spaced from the protruding portion to one side in the axial direction and covers the receiving surface on the one axial direction of the terminal block. The aspect which is doing can be employ | adopted. According to this aspect, the cover can be positioned in the axial direction.

  In the present invention, the second convex portion is formed at two locations that are separated from each other in the second direction, and the terminal block includes a second receiver in which the second convex portion abuts from the opposite side of the second direction. An aspect having a surface can be employed. According to this aspect, the circumferential positioning of the cover with respect to the terminal block can be performed using the second convex portion.

  In the present invention, each of the plurality of terminal pins extends linearly from a portion held in the plurality of grooves to the first end, and the other side of the second convex portion in the axial direction. The surface includes an inclined surface that is inclined from the body portion toward one side in the axial direction and extends toward the first receiving surface, and the surface on one side in the axial direction of the plurality of second plate portions is Each may include a first surface that is inclined from the body portion to one side in the axial direction and extends into the groove. When the terminal pin extends linearly from the middle portion to the first end, the first plate portion is positioned at the position where the second plate portion overlaps the terminal block so as to avoid the first end portion when attaching the cover. However, in this case, when the cover is molded, a normal mold does not come out between the first plate portion and the second convex portion. In the present invention, since the inclined surface is provided on the surface on the other side in the axial direction of the second convex portion and the surface on the one side in the axial direction of the second plate portion, the first plate portion can There is no need to use an expensive mold because it comes out between the two convex portions.

  In this invention, the said 1st surface is extended in the position spaced apart from the said trunk | drum from the said inclined surface, The surface of the one side of the said axial direction of the said several 2nd plate part is respectively said 1st. The aspect which has the 2nd surface extended in the direction orthogonal to the said axial direction on the opposite side to the said trunk | drum with respect to a surface is employable. According to this aspect, when the sealing resin body is formed by the resin mold, it is possible to more reliably suppress the resin from flowing into the side where the first end portion is located via the groove.

In the present invention, the first side surface is provided with a third positioning convex portion protruding toward the cover, and the cover has one circumferential side and the other side in the circumferential direction with respect to the third convex portion. It is possible to adopt a mode in which a positioning portion that comes into contact with the head is provided. According to this aspect, the circumferential positioning of the cover can be easily performed.

  In the present invention, the cover has a protruding portion for preventing resin inflow covering the terminal block from the other side in the axial direction, and the protruding portion has an axis line extending from the first plate portion and the first plate portion overlapping the end surface of the terminal block. A plurality of second plate portions that protrude in one direction and fit into each of the plurality of grooves. For this reason, when the sealing resin body is formed by the resin mold, the resin hardly flows into the side where the first end portion is located through the groove.

It is a perspective view of a motor to which the present invention is applied. It is a disassembled perspective view of the motor shown in FIG. It is sectional drawing of the motor shown in FIG. It is explanatory drawing which looked at the terminal block etc. shown in FIG. 2 from the other side of the axial direction. It is sectional drawing which cut | disconnected the terminal block etc. shown in FIG. 4 along the terminal pin. It is a perspective view of the state which attached the cover shown in FIG. 2 to the 1st side surface side of the terminal block. It is a perspective view of the state which removed the cover from the state shown in FIG. It is a perspective view of the cover shown in FIG. It is a side view of the cover shown in FIG. It is explanatory drawing of the modification 1 of the terminal pin used for the motor shown in FIG. It is explanatory drawing of the modification 2 of the terminal pin used for the motor shown in FIG. It is explanatory drawing of the modification 3 of the terminal pin used for the motor 1 shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(General configuration of motor)
FIG. 1 is a perspective view of a motor 1 to which the present invention is applied. FIG. 2 is an exploded perspective view of the motor 1 shown in FIG. FIG. 3 is a cross-sectional view of the motor 1 shown in FIG. A motor 1 shown in FIG. 1 is a stepping motor, and as will be described below with reference to FIGS. 2 and 3, etc., a motor case 10, a stator 20, a rotor 30, a bobbin 40, a cover 60, and a sealing resin It consists of a body 70 and the like. The motor 1 is used, for example, as a drive source for an air-fuel mixture adjustment valve (attachment target member) of a gasoline engine, and requires high airtightness in an attached state. Therefore, the motor 1 is configured as a sealed motor.

  The motor case 10 is formed in a cylindrical shape by a magnetic metal such as iron, and closes the peripheral wall 11 extending in a cylindrical shape in the axis L direction and the opening on one side La of the peripheral wall 11 in the axis L direction. And an end plate portion 12 formed. In the motor case 10, the other side Lb of the peripheral wall 11 in the axis L direction is an opening 111, and a flange portion 13 protruding outward in the radial direction is formed on the opening edge.

  The stator 20 is a cylindrical body disposed in the motor case 10, and includes a coil 21, a bobbin 40, a yoke 23 (outer stator core), and a yoke 24 (inner stator core). The yokes 23 and 24 are metal annular plate members, and a plurality of pole teeth 25 bent in the axis L direction are formed at equal intervals in the circumferential direction on the inner peripheral edge. The yokes 23 and 24 are arranged to face each other so that the respective pole teeth 25 are alternately arranged in the circumferential direction, and two sets of the yokes 23 and 24 are arranged in the axis L direction.

The bobbin 40 is a resin molded product in which the yokes 23 and 24 are molded with the synthetic resin 41, and is configured by insert injection molding in the mold with the yokes 23 and 24 inserted in the mold. The synthetic resin 41 covers the portions excluding the outer peripheral portions 232 and 242 of the yokes 23 and 24 and the inner peripheral surface of the pole teeth 25, and overlaps the annular portions 233 and 243 of the yokes 23 and 24 (flange portion 41). ), A space around which the coil 21 is wound is formed. The stator 20 configured as described above is arranged such that the outer peripheral portions 232 and 242 of the yokes 23 and 24 are partially in contact with the peripheral wall 11 of the motor case 10.

  A terminal block 45 is formed integrally with an end portion of the bobbin 40 on the other side Lb in the axis L direction. The terminal block 45 has an end portion (flange portion) on the other side Lb of the motor case 10 in the axis L direction. 13) abuts. A plurality of terminal pins 80 extending in the first direction X orthogonal to the axis L direction are held on the terminal block 45 so as to be parallel to the axis L direction and the second direction Y orthogonal to the first direction X. ing. The first end portion 81 that is one end of the terminal pin 80 protrudes from the first side surface 451 that is one side surface in the first direction X of the terminal block 45. The first end portion 81 is a terminal for connecting the coil wire, and is a cover fixed to the bobbin 40 in a state where the end portion (not shown) of the coil wire constituting the coil 21 is connected by welding or soldering. 60. In this state, the opening 111 of the motor case 10 is blocked by the terminal block 45 and the cover 60. The second end 82, which is the other end of the terminal pin 80, is a terminal for external connection protruding from a side surface 452 different from the first side surface 451 of the terminal block 45. In this embodiment, the first end portion 81 protrudes from the second side surface 452 that is the other side surface in the first direction X, and is used for electrical connection with the outside.

  A bearing hole 46 that is recessed on the other side Lb in the axis L direction is formed in a portion of the terminal block 45 that is located on one side La in the axis L direction. A cylindrical bearing member 96 is disposed inside the bearing hole 46, and the bearing member 96 supports the outer peripheral surface of the rotating shaft 31. A thrust support portion 95 made of a metal sphere 950 is supported at the bottom of the bearing hole 46, and an end portion 310 on the other side Lb in the axis L direction of the rotating shaft 31 described later is connected to the other side in the axis L direction. Lb is supported.

  The rotor 30 includes a rotating shaft 31 extending in the direction of the axis L, and a cylindrical permanent magnet 32 fixed to the outer peripheral surface of the rotating shaft 31, and the outer peripheral surface of the permanent magnet 32 has a circumferential direction. N poles and S poles are alternately magnetized. The pole teeth 25 of the stator 20 are opposed to the permanent magnet 32 on the radially outer side.

  A hole 120 is formed in the end plate portion 12 of the motor case 10, and a part of the rotating shaft 31 protrudes from the hole 120 toward one side La in the axis L direction. In this embodiment, an output shaft 39 having a spiral groove (not shown) is formed in a portion of the rotating shaft 31 that protrudes from the end plate portion 12 of the motor case 10. Accordingly, the valve body and the like can be linearly driven by the rotation of the output shaft 39.

  A bearing 92 is held in the hole 120 formed in the end plate portion 12 of the motor case 10. The bearing 92 includes a cylindrical portion 921 that rotatably supports the outer peripheral surface of the rotating shaft 31, and a diameter-enlarged portion 922 that expands radially outward from the end of the other side Lb of the cylindrical portion 921 in the axis L direction. The diameter-enlarged portion 922 is fixed in a state where it is in contact with the end plate portion 12 from the other side Lb in the axis L direction.

In the motor 1 configured as described above, the opening 111 of the motor case 10 is closed by the terminal block 45 and the cover 60 integrally formed with the bobbin 40. In this state, the terminal block 45, the cover 60, and the motor An end of the case 10 in the direction of the axis L is covered with a sealing resin body 70. The sealing resin body 70 includes a bottom portion 73 that covers the terminal block 45 and the cover 60 on the other side Lb in the axis L direction, and a cylindrical portion 72 that covers the terminal block 45, the cover 60, and the motor case 10 from the side surface. .

  The second end portion 82 of the terminal pin 80 protrudes from the wall surface 76 of the sealing resin body 70. The sealing resin body 70 is provided with a cylindrical connector housing 78 so as to surround a portion where the terminal pins 80 are arranged (around the wall surface 76), and the connector housing 78 has a connector (not shown). ) Is inserted, and the electrical connection between the terminal pin 80 and the terminal of the connector is performed. In this embodiment, the connector is a waterproof connector.

  The surface of the sealing resin body 70 facing the one side La in the axis L direction of the motor case 10 in the cylindrical portion 72 is a flange surface 77 for attaching to the air-fuel mixture flow adjustment valve. The flange surface 77 is formed by a plane orthogonal to the axial direction of the motor case 10. The motor case 10 is inserted into, for example, an opening of the mixture flow rate adjustment valve, and the flat mounting surface at the periphery of the opening is formed. By tightly adhering, airtightness is maintained through a seal member such as an O-ring.

  The sealing resin body 70 is a resin portion 71 formed so as to cover the terminal block 45, the cover 60, and the end of the motor case 10 in the axis L direction in the final stage of the assembly process, and is a thermoplastic resin or a thermosetting resin. Made of functional resin. In this embodiment, the resin portion 71 is made of a thermoplastic resin such as polybutylene terephthalate (PBT). The sealing resin body 70 is firmly fixed to the motor case 10 in a state where the opening 111 and the like of the motor case 10 are completely sealed. In this state, most of the motor case 10 is exposed except for the portion located on the other side Lb in the axis L direction. Therefore, the heat generated in the coil 21 can be efficiently released to the outside through the metal motor case 10. Therefore, insulation failure due to melting of the insulating coating of the coil 21, thermal deformation of each member, thermal demagnetization of the permanent magnet 32, and the like can be suppressed. Further, since the portion covered with the resin is reduced, the diameter can be reduced, the weight can be reduced, and the cost can be reduced. Furthermore, when the sealing resin body 70 is molded, a portion of the sealing resin body 70 that covers the periphery of the motor case 10 is pressed against the motor case 10, so that the flange surface 77 and the like can be accurately formed. Therefore, the motor 1 can be assembled with high accuracy using the flange surface 77 as a reference.

(Configuration of terminal pin 80 and terminal block 45)
FIG. 4 is an explanatory view of the terminal block 45 and the like shown in FIG. 2 as viewed from the other side Lb in the axis L direction, and the output shaft 39 is not shown. As shown in FIG. 4, the terminal pin 80 is a metal square bar, and in this embodiment, the terminal pin 80 has a quadrangular cross section. The terminal pin 80 extends linearly in the first direction X. The terminal pin 80 is formed with crushing portions 88 and 89 at two positions in the middle of the extending direction. The crushing parts 88 and 89 are formed by pressing.

  The terminal block 45 is provided with a substantially circular lid portion 453 on one side La in the axis L direction, and a terminal holding portion 455 on the other side Lb in the axis L direction. A surface on one side La in the axis L direction of the lid portion 453 is a first end surface 453a with which a part of the opening edge (flange portion 13) of the motor case 10 abuts.

The second end surface 450 on the other side in the axis L direction of the terminal block 45 (the second end surface 450 on the other side in the axis L direction of the terminal holding portion 455) extends in the first direction X so that the terminal pin 80 is placed inside. A plurality of grooves 456 held in parallel with each other in the second direction Y. The groove 456 extends to the first side surface 451 and the second side surface 452. On the second end surface 450, groove-shaped recesses 450 a and 450 b are formed in a portion sandwiched between the grooves 456 in the second direction Y. Of the crushed portions 88 and 89 of the terminal pin 80, the crushed portion 88 is located inside the groove 456, and the crushed portion 89 is located at a position protruding from the second side surface 452. In this embodiment, since the crushing portion 88 is formed in the portion of the terminal pin 80 located inside the groove 456, the portion that partially protrudes during the crushing process bites into the inner surface of the groove 456. Therefore, the terminal pin 80 can be properly temporarily fixed to the groove 456 by press-fitting the terminal pin 80 into the groove 456.

(Configuration of cover 60 and first side surface 451, etc.)
FIG. 5 is a cross-sectional view of the terminal block 45 and the like shown in FIG. FIG. 6 is a perspective view of a state in which the cover 60 shown in FIG. 2 is attached to the first side surface 451 side of the terminal block 45. FIG. 7 is a perspective view of the state shown in FIG. 6 with the cover 60 removed. FIG. 8 is a perspective view of the cover 60 shown in FIG. FIG. 9 is a side view of the cover 60 shown in FIG.

  As shown in FIGS. 5 and 6, the terminal block 45 is formed with a step portion 454 that protrudes from the first end surface 453 a of the lid portion 453 to one side La in the axis L direction. It is formed radially inward from the portion 453. The outer peripheral surface 454a of the stepped portion 454 has an arc shape having the same radius of curvature as the inner peripheral surface of the peripheral wall 11 of the motor case 10 when viewed from the direction of the axis L, and the inner peripheral surface of the peripheral wall 11 of the motor case 10 Abuts from the inside in the radial direction. The step portion 454 is interrupted in the circumferential direction, and end portions 454 b located on both sides in the circumferential direction of the interrupted portion of the step portion 454 protrude from the first side surface 451 toward the cover 60.

  On the first side surface 451 of the terminal block 45, a fourth convex portion 459 protruding toward the cover 60 is formed between the end portions 454b of the step portion 454. In the present embodiment, the fourth convex portion 459 is formed at two locations that are separated in the second direction Y.

  In the first end surface 453a of the lid portion 453, at a position that partially overlaps the stepped portion 454 in the axis L direction, the first end surface 453a faces the other side Lb from the axis L direction to the one side La in the axis L direction. The first receiving surfaces 457a are formed at two locations that are separated in the second direction Y. Accordingly, a recess 457 that opens at the first side surface 451 is formed between the first receiving surface 457 a and the stepped portion 454. In the concave portion 457, a surface facing the second direction Y is a second receiving surface 457b, and the second receiving surfaces 457b formed at two locations separated in the second direction are opposite to each other in the circumferential direction.

  6, 8, and 9, the cover 60 is a resin molded product, and a body portion 61 that faces the first side surface 451 of the terminal block 45, and an end portion of the body portion 61 on the other side Lb in the axis L direction. The terminal block 45 extends from the end portion on one side La in the axis L direction of the body portion 61 at each of the protruding portion 63 for preventing resin inflow protruding from the terminal portion 45 toward the terminal block 45 and both ends in the circumferential direction of the body portion 61. And a second convex portion 64 protruding toward the surface. Further, the cover 60 includes a first convex portion 62 that protrudes from the end portion on the one side La in the axis L direction of the body portion 61 to the one side La in the axis L direction.

  The first convex portion 62 has an outer circumferential surface 621 opposite to the first side surface 451 in an arc shape along the opening edge of the motor case 10 on the radially inner side of the outer surface 611 opposite to the first side surface 451 of the body portion 61. When viewed from the direction of the axis L, the circular arc surface has the same radius of curvature as the outer peripheral surface 454a of the stepped portion 454. Between the 1st convex part 62 and the trunk | drum 61, it becomes the support surface 610 which parts other than the part contact | abutted to the 1st end surface 453a of the terminal block 45 among the flange parts 13 of the motor case 10 contact | abut. . In the present embodiment, the first convex portion 62 is formed on a part of the body portion 61 in the circumferential direction. In the present embodiment, the first convex portion 62 is formed at the center in the circumferential direction of the body portion 61.

  A concave portion 69 is formed on the first convex portion 62 on the surface facing the first side surface 451, and the inner walls 691 and 692 facing the circumferential direction in the concave portion 69 are surrounded by the fourth convex portion 459 of the terminal block 45. A positioning portion 690 that abuts from one side and the other side of the direction and defines the circumferential position of the cover 60 is provided.

  The protruding portion 63 protrudes from the end portion of the body portion 61 on the other side Lb in the axis L direction toward the terminal block 45 and covers the second end surface 450 of the terminal block 45, and the first plate portion 66. A plurality of second plate portions 67 projecting in parallel in the second direction Y on one side La in the axis L direction, and each of the plurality of second plate portions 67 is provided inside each of the grooves 456. And covers the terminal pin 80 in the groove 456. Therefore, when molding the sealing resin body 70, it is possible to prevent the resin from flowing around the terminal pins 80 and flowing into the cover 60.

  A recess 65 in which the first end portion 81 is located on the inner side is formed on the surface of the body portion 61 that faces the terminal block 45. In this embodiment, the recess 65 is partitioned by a partition wall 68 into small recesses 650 that receive the first ends 81 of the plurality of terminal pins 80.

  Each of the plurality of terminal pins 80 linearly extends from the portion 84 located in the groove 456 to the first end portion 81. The surface 640 on the other side Lb in the axis L direction of the second convex portion 64 includes an inclined surface 641 that inclines from the body 61 toward one side La in the axis L direction and extends toward the first receiving surface 457a. . Accordingly, the first receiving surface 457 a is also an inclined surface that is inclined similarly to the surface 640. Further, in the plurality of second plate portions 67, the surface 670 on one side La in the axis L direction includes a first surface 671 that extends from the body portion 61 to one side in the axis L direction and extends into the groove 456. Yes. In this embodiment, the first surface 671 of the second plate portion 67 extends at a position away from the body portion 61 from the inclined surface 641 of the second convex portion 64, and the surfaces 670 of the plurality of second plate portions 67. Are formed on a second surface 672 extending in a direction orthogonal to the axis L direction on the opposite side of the body portion 61 with respect to the first surface 671, and the second surface 672 is a terminal in the groove 456. It covers the pin 80.

  When the cover 60 configured in this manner is pushed into the terminal block 45 so that the first convex portion 62 enters the inside of the opening 111 of the motor case 10, the second convex portion 64 fits inside the concave portion 457, The 1st board part 66 of the protrusion part 63 overlaps with the 2nd end surface 450 from the other side Lb of the axis line L direction. In this state, the 1st convex part 62 fits between the edge parts 454b of the step part 454 (discontinuous part of the circumferential direction of the step part 454), and comprises a disc part. Further, the support surface 610 of the body portion 61 and the first end surface 453a of the lid portion 453 of the terminal block 45 constitute the same plane.

  At this time, the second convex portion 64 fits inside the concave portion 457, overlaps the first receiving surface 457a from one side La in the axis L direction, and overlaps the second receiving surface 457b from both sides in the circumferential direction. Further, the two fourth convex portions 459 of the terminal block 45 fit into the concave portions 69 of the cover 60. Accordingly, the cover 60 is positioned on the terminal block 45 in the circumferential direction and the axis L direction. Moreover, the 1st convex part 62 and the step part 454 fit inside from the opening part 111 of the motor case 10, and contact | abut to the surrounding wall 11 from radial inside. Further, the opening edge (flange portion 13) of the motor case 10 abuts on the support surface 610 and the first end surface 453a of the cover 60, and the opening portion 111 of the motor case 10 is blocked by the cover 60 and the terminal block 45. .

  In this state, the first end 81 of each of the plurality of terminal pins 80 is positioned inside the recess 650 as shown in FIG. However, the first end 81 does not contact the inner wall 651 of the recess 650.

  In addition, when the first plate portion 66 of the protruding portion 63 of the cover 60 overlaps the second end surface 450 from the other side Lb in the axis L direction, the second plate portion 67 covers the terminal pin 80 in the groove 456. It becomes. In this state, the protrusion 63 of the cover 60 covers the first end portion 81 side from the middle portion of the terminal pin 80, and the other portion of the terminal pin 80 (from the middle portion to the second end portion 82 side) The cover 60 is exposed. Therefore, when the sealing resin body 70 is formed by the resin mold, after the terminal pin 80, the portion excluding the portion covered with the cover 60 and the second end portion 82 is covered with the sealing resin body 70. At this time, since the crushed portions 88 and 89 formed on the terminal pin 80 are both exposed from the cover 60, the portions where the crushed portions 88 and 89 are formed are covered with the sealing resin body 70.

(Main effects of this form)
As described above, in the motor 1 of this embodiment, the protrusion 63 for preventing resin inflow of the cover 60 covers a portion of the second end surface 450 of the terminal block 45 located on the first end 81 side. For this reason, since the second end portion 82 of the terminal pin 80 protrudes from the terminal block 45 through the groove 456, there is no need to provide a hole or the like for protruding the second end portion 82 in the cover 60. Therefore, the configuration of the cover 60 can be simplified. Moreover, the operation | work which attaches the cover 60 can be performed efficiently. In addition, among the plurality of terminal pins 80, among the portions located in the groove 456, the portion exposed from the protruding portion 63 is sealed with the sealing resin body 70, so that the first end portion from around the terminal pin 80 is used. Moisture does not easily enter the space where 81 is disposed (inside the cover 60).

  The protruding portion 63 includes a first plate portion 66 that covers the second end surface 450 and a plurality of second plate portions 67 that protrude from the first plate portion 66 and fit into the respective grooves 456. ing. For this reason, when the sealing resin body 70 is formed by the resin mold, the resin hardly flows into the inside of the cover 60 where the first end portion 81 is located via the groove 456. Therefore, when the resin sealing body 70 is molded, problems such as the coil wire being disconnected due to the inflowing resin are less likely to occur.

  Further, each of the plurality of terminal pins 80 linearly extends from the portion 84 located in the groove 456 to the first end portion 81, and corresponding to such a configuration, the surface 640 of the second convex portion 64, Each of the surfaces 670 of the second plate portion 67 is provided with an inclined surface 641 and a first surface 671 inclined from the body portion 61 to one side La in the axis L direction. For this reason, when the cover 60 is molded, even with a normal mold, the mold can be obliquely removed from between the first plate portion 66 and the second convex portion 64, and therefore it is necessary to use an expensive mold. Absent. That is, when the cover 60 is attached, when the second plate portion 67 protrudes from the first plate portion 66 in the axis L direction at a position overlapping the terminal block 45 so as to avoid the first end portion 81, In the mold, the mold cannot be removed from between the first plate portion 66 and the second convex portion 64. However, according to this embodiment, such a problem does not occur.

  Further, the second plate portion 67 has a second surface 672 extending in a direction orthogonal to the axis L direction on the side opposite to the body portion 61 with respect to the first surface 671. The plate portion 67 properly covers the terminal pin 80 in the groove 456. Therefore, when the sealing resin body 70 is formed by the resin mold, the resin hardly flows into the side where the first end portion 81 is located through the groove 456.

  Further, a third convex portion 459 is formed on the first side surface 451 of the terminal block 45, and the cover 60 is provided with a positioning portion 690 that contacts the third convex portion 459 from one side and the other side in the circumferential direction. Therefore, the cover 60 can be easily positioned in the circumferential direction.

  Further, the protrusion 63 of the cover 60 covers the terminal block 45 from the other side Lb in the axis L direction, and the second convex portion 64 of the cover 60 extends from the other side Lb in the axis L direction to the first receiving surface 457a of the terminal block 45. Put on. For this reason, since the terminal block 45 is sandwiched from both sides in the axis L direction by the protrusion 63 and the second convex portion 64 of the cover 60, the cover 60 can be properly positioned with respect to the terminal block 45. . Therefore, the motor 1 can be assembled with the opening 111 of the motor case 10 properly closed by the terminal block 45 and the cover 60. Further, since the first receiving surface 457a is formed on the terminal block 45 on the other side Lb in the axis L direction from the first end surface 453a, the terminal block 45 is formed by the protruding portion 63 and the second convex portion 64 of the cover 60. Is easily sandwiched from both sides in the direction of the axis L.

Further, the cover 60 is in contact with the inner peripheral surface of the motor case 10 from the inside in the radial direction in a state where the first protrusion 62 is in contact with the first side surface 451 of the terminal block 45. For this reason, it is easy to arrange the cover 60 so as to close the opening 111 of the motor case 10. Further, the cover 60 and the terminal block 45 can be properly positioned in the first direction X in which the cover 60 and the terminal block 45 face each other. Further, the terminal block 45 is provided with a step portion 454 protruding from the first end surface 451 to one side La in the axis L direction. For this reason, the motor 1 can be assembled in a state where the opening 111 of the motor case 10 is properly closed by the terminal block 45 and the cover 60.

  The first convex portion 62 is fitted between the end portions 454 b of the step portion 454. The two second convex portions 64 are in contact with the second receiving surface 457b from the opposite side in the circumferential direction. Further, the two fourth convex portions 459 of the terminal block 45 fit into the concave portions 69 of the cover 60. Accordingly, the cover 60 is positioned on the terminal block 45 in the circumferential direction and the axis L direction.

  Further, since the motor case 10 has the flange portion 13 formed at the opening edge, even if the opening edge of the motor case 10 is brought into contact with the body portion 61 of the cover 60 and the first end surface 453a of the terminal block 45, The opening edge of the motor case 10, the body 61 of the cover 60, and the first end surface 453 a of the terminal block 45 are not easily deformed.

(Another embodiment)
FIG. 10 is an explanatory diagram of a first modification of the terminal pin 80 used in the motor 1 shown in FIG. FIG. 11 is an explanatory diagram of a second modification of the terminal pin 80 used in the motor 1 shown in FIG. FIG. 12 is an explanatory diagram of a third modification of the terminal pin 80 used in the motor 1 shown in FIG.

  In the embodiment described with reference to FIGS. 1 to 9, the terminal pin 80 extends linearly, but the present invention may be applied when the terminal pin has a bent portion. For example, as shown in FIG. 10, a bent portion 822 is provided only on the second end portion 82 side, and the second end portion 82 is one of the first end portion 81 and the portion 84 located in the groove 456 in the axis L direction. The present invention may be applied to the case of being located on the side La. Further, as shown in FIG. 11, a bent portion 821 is provided only on the first end portion 81 side, and the first end portion 82 is one of the second end portion 82 and the portion 84 located in the groove 456 in the axis L direction. The present invention may be applied to the case of being located on the side La. In addition, as shown in FIG. 12, bent portions 821 and 822 are provided on both the first end portion 81 side and the second terminal 82 side, and the first end portion 81 and the second end portion 82 are positioned in the groove 456. The present invention may be applied to the case where it is located on one side La in the direction of the axis L from the portion 84 to be performed.

(Other embodiments)
In the above embodiment, the motor 1 is a stepping motor, but the present invention may be applied to other types of motors.

DESCRIPTION OF SYMBOLS 1 ... Motor, 10 ... Motor case, 11 ... Perimeter wall, 12 ... End plate part, 13 ... Flange part, 20 ... Stator, 30 ... Rotor, 31 ... Rotary shaft, 32 ... Permanent magnet, 39 ... Output shaft, 40 ... Bobbin 41 ... Synthetic resin, 45 ... Terminal block, 60 ... Cover, 61 ... Body, 62 ... First convex part, 63 ... Projection part, 64 ... Second convex part, 66 ... First plate part, 67 ... Second Plate part 68 ... Partition wall 70 ... Sealing resin body 71 ... Resin part 72 ... Tube part 73 ... Bottom part 76 ... Wall surface 78 ... Connector housing 80 ... Terminal pin 81 ... First end part 82 ... Second end portion, 88, 89 ... Crushing portion, 111 ... Opening portion, 120 ... Hole, 450 ... End surface, 451 ... First side surface, 452 ... Second side surface, 453 ... Lid portion, 454 ... Step portion, 455 ... terminal holding part, 456 ... groove, 457a ... first receiving surface, 457b ... second receiving surface, 459 Third convex portion, 641 ... inclined surface, 671 ... first surface 672 ... second surface, X ... first direction, Y ... second direction

Claims (10)

A rotor with permanent magnets;
A stator facing the permanent magnet;
A motor case that covers the rotor and the stator and is provided with an end plate at one end in the axial direction;
A plurality of grooves, which are arranged on the other side of the motor case in the axial direction and extend in the first direction on the other end surface in the axial direction, are orthogonal to the axial direction and the first direction. A terminal block formed to be parallel in two directions;
The terminal block is held inside each of the plurality of grooves and has a first end portion for connecting a coil wire that is one end in the first direction and a second end portion for external connection that is the other end. A plurality of terminal pins protruding from different first and second side surfaces;
A cover that is disposed so as to cover the first end portion and closes an opening portion that opens toward the other side in the axial direction of the motor case together with the terminal block;
A sealing resin body including a wall surface provided to cover the terminal block and the cover from the other side in the axial direction so as to cover a side surface of the motor case, and the second end portion protrudes;
Have
The cover includes a barrel portion that is opposed to the first side surface and contacts an opening edge of the motor case, and a protrusion portion that protrudes from the barrel portion and covers the terminal block from the other side in the axial direction. And having
The protruding portion includes a first plate portion that overlaps the end surface, and a plurality of second plate portions that protrude from the first plate portion to one side in the axial direction and fit into the plurality of grooves. A motor comprising the motor.   The cover protrudes radially inward from the position where the end of the motor case abuts in the body portion and protrudes to one side in the axial direction, and contacts the inner peripheral surface of the motor case from the radially inner side. The motor according to claim 1, comprising: The terminal block includes an arc-shaped step portion that comes into contact with the inner peripheral surface from the radially inner side,
3. The motor according to claim 2, wherein the first convex portion is in contact with the inner peripheral surface from the inner side in the radial direction in a state where the first convex portion is fitted in a circumferentially interrupted portion of the stepped portion.   The motor according to any one of claims 1 to 3, wherein a concave portion in which the first end portion is located inside is formed on a surface of the body portion facing the terminal block. .   The motor according to claim 4, wherein a partition wall for partitioning terminal pins adjacent to each other in the second direction among the plurality of terminal pins is provided in the recess.   The cover has a second convex portion that protrudes from the body portion at a position spaced from the protruding portion to one side in the axial direction and covers the first receiving surface facing the one side in the axial direction of the terminal block. The motor according to claim 5, wherein the motor is provided. The second convex portions are formed at two locations separated in the second direction,
The motor according to claim 6, wherein the terminal block includes a second receiving surface on which each of the second convex portions abuts from the opposite side of the second direction. Each of the plurality of terminal pins extends linearly from a portion held in the plurality of grooves to the first end;
The surface on the other side in the axial direction of the second convex portion includes an inclined surface that inclines from the body portion to one side in the axial direction and extends toward the first receiving surface,
Each of the surfaces on one side in the axial direction of the plurality of second plate portions includes a first surface inclined from the body portion to one side in the axial direction and extending into the groove. The motor according to claim 7. The first surface extends from the inclined surface to a position separated from the body portion,
Each of the surfaces on one side in the axial direction of the plurality of second plate portions is a second surface extending in a direction orthogonal to the axial direction on the side opposite to the body portion with respect to the first surface. The motor according to claim 8, further comprising: The terminal block is provided with a third convex portion for positioning protruding toward the cover,
The positioning part which contacts the said 3rd convex part from the one side and the other side of the circumferential direction with respect to the said 3rd convex part is provided in the said cover, The Claim 1 characterized by the above-mentioned. motor.

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