CN211429070U

CN211429070U - Motor and valve element driving device

Info

Publication number: CN211429070U
Application number: CN202020368419.3U
Authority: CN
Inventors: 勝吕浩成; 大川高德; 矢岛克英
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2019-03-29
Filing date: 2020-03-20
Publication date: 2020-09-04
Anticipated expiration: 2030-03-20
Also published as: JP7219138B2; JP2020167826A

Abstract

A motor and a valve core driving device, the motor can smoothly insert a bent terminal pin including a bent portion into a terminal receiving groove of a terminal block. In the motor, a terminal pin (80) held in a terminal receiving groove (48) of a terminal block (45) has a first portion (83) extending linearly in a first direction and a second portion (86) bent from the first portion toward one side in an axial direction, and therefore has a bent portion (836) between the first portion and the second portion. The width of the bent portion that bulges when the bent portion is bent is increased, but in the terminal housing groove, an expanded portion (480) having an increased groove width is formed between a first groove portion (481) that houses the first portion and a second groove portion (482) that houses the second portion. Therefore, even if the width of the portion of the first groove portion or the like holding the portion other than the bent portion of the terminal pin is made to coincide with the width of the terminal pin, the terminal pin can be smoothly inserted into the terminal accommodating groove.

Description

Motor and valve element driving device

Technical Field

The utility model relates to a motor and case drive arrangement who is formed with terminal accepting groove on the terminal platform.

Background

As a motor used in a valve body driving device or the like, there has been proposed a structure in which a terminal pin is held on a terminal block provided so as to overlap with an opening end of a motor case covering a stator (see patent document 1).

In the motor described in patent document 1, the terminal pin has a coil wire connected to one of two end portions protruding from the terminal block, and the other end portion is used for electrical connection to the outside. Here, the terminal pin includes a first portion extending linearly along the bottom of the terminal block and a second portion bent from the first portion to one side in the axial direction.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2005-253136

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by the utility model

In the motor described in patent document 1, the following structure is conceivable: when the terminal pins are held on the terminal block, terminal receiving grooves are provided in the terminal block for receiving the first and second portions of the terminal pins inside. In this case, in order to reliably hold the terminal pins in the terminal accommodating grooves, it is preferable that the terminal pins be held in the terminal accommodating grooves by matching the groove width of the terminal accommodating grooves with the thickness of the terminal pins. However, when the terminal pin is bent, the width of the bent portion becomes wider, and there is a problem that the terminal pin cannot be smoothly inserted into the terminal accommodating groove.

In view of the above, an object of the present invention is to provide a motor and a valve element driving device that can smoothly insert a bent terminal pin including a bent portion into a terminal receiving groove of a terminal block.

Technical scheme for solving technical problem

In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a motor, including: a stator; a rotor that is opposed to the stator and is rotatable about an axis; a motor case that covers the stator from one side in the axis direction; a terminal pin including a first portion extending straight in the first direction intersecting the axial direction, a second portion bent at an end of the first portion and extending to the one side in the axial direction, and a third portion bent at an end of the second portion on the one side in the axial direction and extending to an opposite side of the first portion in the first direction; and a terminal block that overlaps the motor case from the other side in the axial direction, and that is formed with a terminal accommodation groove that includes a first groove portion that holds the first portion inside at a bottom portion located on the other side in the axial direction, and a second groove portion that holds the second portion inside at a side surface facing the first direction, and a portion between the first groove portion and the second groove portion that accommodates a bent portion between the first portion and the second portion is an expanded portion having a wider groove width.

In the present invention, the terminal pin includes a first portion extending straight in the first direction and a second portion extending in the axial direction and bent at an end of the first portion, and a first groove portion for holding the first portion inside is formed in a bottom portion of the terminal block, and a second groove portion for holding the second portion inside is formed in a side surface of the terminal block in the first direction. Here, when the bent portion between the first portion and the second portion is bent, the terminal pin is bulged and the width is locally widened, but a portion accommodating the bent portion between the first groove portion and the second groove portion is an expanded portion in which the groove width is widened. Therefore, even if the terminal pins are held in the terminal accommodating grooves by matching the groove widths of the portions of the first groove portions and the like that hold the portions of the terminal pins other than the bent portions with the thicknesses of the portions of the terminal pins other than the bent portions, the terminal pins can be smoothly inserted into the terminal accommodating grooves.

The utility model discloses in, can adopt following mode: the first groove portion, a portion of the first portion that accommodates a portion adjacent to the curved portion, and the second groove portion are the expanded portion. According to this structure, the terminal pin can be smoothly inserted into the terminal accommodating groove.

The utility model discloses in, can adopt following mode: the second groove portion is the expansion portion as a whole. According to this aspect, even if the bent portion between the second portion and the third portion becomes thick, the terminal pin can be smoothly inserted into the terminal accommodating groove.

The utility model discloses in, can adopt following mode: the expanded portion reaches the bottom of the terminal housing groove from the opening edge or the vicinity of the opening edge of the terminal housing groove. According to this aspect, the terminal pin can be smoothly inserted into the deep portion of the terminal accommodating groove.

The utility model discloses in, can adopt following mode: in the terminal pin, a first end portion as an end portion of the terminal pin on a side opposite to the third portion is used for coil wire connection, and a second end portion as an end portion of the third portion is used for external connection. According to this aspect, the second end portion for external connection is located on one side in the axial direction with respect to the bottom portion of the terminal block. Therefore, the second end portion can be electrically connected to the outside at a position closer to the one side in the axial direction than the bottom portion of the terminal block, and therefore, the same effect as shortening the dimension in the axial direction of the motor is achieved.

The utility model discloses in, can adopt following mode: the motor has: a cover disposed so as to cover the first end portion; and a sealing resin body that is provided so as to cover the terminal block and the cover from the other side in the axial direction and that covers a side surface of the motor case, the sealing resin body including a wall surface from which the second end portion protrudes. According to this aspect, the motor case can be sealed from the other side in the axial direction.

The utility model relates to a motor can be used for case drive arrangement, and under this condition, this case drive arrangement's characterized in that has: a rotating shaft provided to the rotor and having a spiral groove formed on an outer circumferential surface thereof; a valve core; and a feed screw mechanism that converts rotation of the rotary shaft into a force that linearly moves the valve element.

(effects of utility model)

In the present invention, the terminal pin includes a first portion extending straight in the first direction and a second portion extending in the axial direction and bent at an end of the first portion, and a first groove portion for holding the first portion inside is formed in a bottom portion of the terminal block, and a second groove portion for holding the second portion inside is formed in a side surface of the terminal block in the first direction. Here, when the bent portion between the first portion and the second portion is bent, the terminal pin may bulge so that the width is locally widened, but a portion accommodating the bent portion between the first groove portion and the second groove portion is an expanded portion in which the groove width is widened. Therefore, even if the terminal pins are held in the terminal accommodating grooves by the first groove portions or the like such that the groove widths of the portions other than the bent portions of the terminal pins are equal to the thicknesses of the portions other than the bent portions of the terminal pins, the terminal pins can be smoothly inserted into the terminal accommodating grooves.

Drawings

Fig. 1 is a perspective view of a valve element drive device to which the present invention is applied, as viewed from a side where the valve element is located.

Fig. 2 is an exploded perspective view of the valve element driving device shown in fig. 1, as viewed from a side opposite to a side where the valve element is located.

Fig. 3 is a sectional view of the valve core driving device shown in fig. 1.

Fig. 4 is an exploded perspective view of the motor shown in fig. 1.

Fig. 5 is a perspective view of the terminal block shown in fig. 4 and the like as viewed from the other side in the axial direction.

Fig. 6 is a bottom view of the terminal block shown in fig. 4 and the like as viewed from the other side in the axial direction.

Fig. 7 is a side view of the terminal block shown in fig. 4 and the like, as viewed from the second end portion side.

Fig. 8 is a cross-sectional view of the terminal block shown in fig. 4 and the like, cut at a position where a terminal pin passes.

Description of the reference numerals

1 … electric motor; 5 … feed screw mechanism; 10 … motor housing; a 20 … stator; 30 … rotor; 31 … rotating shaft; 32 … permanent magnets; 39 … output shaft; 40 … wire reels; 45 … terminal block; 48 … terminal receiving groove; a 50 … valve cartridge; a 60 … cover; 70 … sealing the resin body; 80 … terminal pins; 81 … first end; 82 … second end; 83 … first part; 86 … second part; 87 … a third part; 91 … guide member; 92 … coil spring; 100 … valve core drive; 310 … spiral groove; 450 … bottom; 451. 452 … sides; 480 … expansion; 481 … first groove part; 482 … second groove portion; 486. 487 … sidewalls; 488 … opening edge; 489 … tank bottom; 580 … internal threads; 836. 867 …; a first direction X …; a second direction of Y …; la … side; lb … on the other side.

Detailed Description

An embodiment of the present invention will be described below with reference to the drawings.

(integral Structure of Motor)

Fig. 1 is a perspective view of a valve element drive device 100 to which the present invention is applied, as viewed from a side where a valve element 50 is located. Fig. 2 is an exploded perspective view of the valve element drive device 100 shown in fig. 1, as viewed from the side opposite to the side where the valve element 50 is located. Fig. 3 is a sectional view of the valve element drive device 100 shown in fig. 1. Fig. 4 is an exploded perspective view of the motor 1 shown in fig. 2. The valve body drive device 100 shown in fig. 1 includes a valve body 50 and a motor 1, and as described below with reference to fig. 2 to 4, the motor 1 includes a motor case 10, a stator 20, a rotor 30, a bobbin 40 including a terminal block 45, a cover 60, a sealing resin body 70, and the like. The valve element drive device 100 drives a valve element of a mixture flow rate adjusting device of a gasoline engine, for example. Therefore, the motor 1 is required to have high airtightness in a state where the motor 1 is mounted on the mixture gas flow rate adjusting device, and therefore the motor 1 is configured as a sealed motor.

As shown in fig. 2, 3, and 4, the motor case 10 is formed in a cup shape from a magnetic metal such as iron so as to cover the stator 20 from one side La in the direction of the axis L. More specifically, the motor case 10 includes a body portion 11 and an end plate portion 12, the body portion 11 extending cylindrically in the direction of the axis L, the end plate portion 12 being formed so as to close the opening of one side La of the body portion 11 in the direction of the axis L. The other side Lb of the motor case 10 in the direction of the axis L of the body portion 11 is an opening 111, and a flange portion 13 protruding radially outward is formed in the opening 111.

In the present embodiment, the motor 1 is a stepping motor. 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 annular plate members made of metal, and have a plurality of pole teeth 25 formed on the inner peripheral edge thereof at equal intervals in the circumferential direction and bent in the direction of the axis L. The

yokes

23 and 24 are arranged to face each other so that the teeth 25 are alternately arranged in the circumferential direction, and the

yokes

23 and 24 are arranged in pairs and in two sets in the direction of the axis L.

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 N-poles and S-poles are alternately magnetized in the circumferential direction on the outer peripheral surface of the permanent magnet 32. In the rotor 30, the permanent magnets 32 are radially outward opposed to the pole teeth 25 of the stator 20.

A hole 120 is formed in the end plate portion 12 of the motor case 10, and a part of the rotary shaft 31 protrudes from the hole 120 toward one side La in the direction of the axis L. The bearing 97 is held in the hole 120, and the spacer 98 is disposed to overlap the other side Lb of the bearing 97 in the direction of the axis L. The portion of the rotary shaft 31 protruding from the end plate portion 12 of the motor case 10 is an output shaft 39 having a spiral groove 310 formed on the outer peripheral surface thereof.

The bobbin 40 is, for example, a resin molded product obtained by molding the

yokes

23 and 24 with a synthetic resin, and is formed by insert injection molding in a mold with the

yokes

23 and 24 fitted in the mold. The synthetic resin covers the outer peripheral portions of the

yokes

23 and 24 and the portions other than the inner peripheral surfaces of the teeth 25, and forms a space in which the coil 21 is wound between the portions (flange portions) overlapping the

yokes

23 and 24. The stator 20 configured as described above is disposed such that the outer peripheral portions of the

yokes

23 and 24 partially contact the body portion 11 of the motor case 10.

A terminal block 45 is integrally formed at the end portion of the other side Lb in the direction of the axis L of the bobbin 40, and the terminal block 45 is provided with a lid 453 against which the flange portion 13 of the motor case 10 abuts. The 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 aligned in the second direction Y orthogonal to the axis L direction and the first direction X. The first end portion 81 as one end of the terminal pin 80 protrudes from one side surface 451 of the terminal block 45 in the first direction X. The first end 81 is a terminal for connecting a coil wire to which an end (not shown) of a coil wire constituting the coil 21 is connected by welding, soldering, or the like, and is covered with the cover 60 supported by the bobbin 40. The second end 82 as the other end of the terminal pin 80 is a terminal for external connection protruding from the other side surface 452 of the terminal block 45 in the first direction X, and is used for electrical connection with the outside.

In the terminal block 45, a portion adjacent to the lid portion 453 at one side La in the direction of the axis L is a flange portion 456, and the flange portion 456 overlaps the inner peripheral surface of the body portion 11 of the motor case 10. A notch 456a is formed in the flange 456 on the side where the cover 60 is located. A recess 453a is formed on a surface of one side La of the lid 453 in the direction of the axis L on the side where the cover 60 is located.

A bearing hole 46 is formed in a portion of the terminal block 45 located on one side La in the direction of the axis L, and is recessed toward the other side Lb in the direction of the axis L. A cylindrical bearing 96 is disposed inside the bearing hole 46, and the bearing 96 supports the outer peripheral surface of the rotary shaft 31. A thrust support portion 95 formed of a metal ball 950 is supported at the bottom of the bearing hole 46, and supports an end portion of the other side Lb of the rotary shaft 31 in the axis L direction from the other side Lb in the axis L direction.

(Structure of valve body 50 and feed screw mechanism 5)

The valve body 50 is a cylindrical member disposed radially outward of the rotary shaft 31, and has one end La in the direction of the axis L closed. More specifically, the valve body 50 includes a tip end portion 56 having a conical outer peripheral surface, a first tubular portion 57 extending from the tip end portion 56 to the other side Lb in the direction of the axis L, and a second tubular portion 58 extending from the tip end portion 56 to the other side Lb in the direction of the axis L inside the first tubular portion 57. A female screw 580 is formed on the inner peripheral surface of the second tube portion 58, and the female screw 580 engages with the spiral groove 310 of the rotary shaft 31. Therefore, the valve body 50 is configured as a nut member.

A cylindrical guide member 91 is disposed between the first cylindrical portion 57 and the second cylindrical portion 58, and the cylindrical guide member 91 guides the valve body 50 in the direction of the axis L while preventing the valve body 50 from rotating together with the rotary shaft 31. The guide member 91 is fixed to the end plate portion 12 of the motor case 10. Between the guide member 91 and the first cylindrical portion 57, a coil spring 92 is disposed that prevents a gap from occurring between the spiral groove 310 of the rotary shaft 31 and the female screw 580 of the valve element 50. In this way, the feed screw mechanism 5 that converts the rotation of the rotary shaft 31 into the linear motion of the valve body 50 is configured such that when the valve body 50 is moved to one side La in the direction of the axis L, the outer peripheral surface of the distal end portion 56 abuts against the seat surface formed in the flow passage.

(Structure of sealing resin body 70)

In the motor 1 configured as described above, the opening 111 in the direction of the axis L of the motor case 10 is closed by the lid 453 of the terminal block 45 and the cover 60 integrally formed on the bobbin 40, and in this state, the terminal block 45, the cover 60, and the end of the motor case 10 in the direction of the axis L are covered with the sealing resin body 70. The sealing resin body 70 has a bottom wall 73 covering the terminal stand 45 and the cover 60 from the other side Lb in the axis L direction, and a body portion 72 covering the terminal stand 45, the cover 60, and the motor case 10 from the side. The bottom wall 73 is provided with a projection 75, and when the motor 1 is mounted on the device, the projection 75 abuts against a step portion on the device side or a wall surface of the hole to position the motor 1.

The second end 82 of the terminal pin 80 protrudes from the wall surface 76 of the sealing resin body 70. A cylindrical connector housing 78 is provided in the sealing resin body 70 so as to surround the periphery of the portion where the terminal pins 80 are arranged (the periphery of the wall surface 76), and a connector (not shown) is inserted into the connector housing 78 to electrically connect the terminal pins 80 and the terminals of the connector. In this embodiment, the connector is a waterproof connector.

In the final stage of the assembly process, the sealing resin body 70 is a resin portion 71 formed to cover the terminal block 45, the cover 60, and the end portion of the motor case 10 in the direction of the axis L, and is made of a thermoplastic resin or a thermosetting resin. In the present 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 of the motor case 10 and the like are completely sealed. In this state, most of the motor case 10 is exposed except for the portion on the other side Lb in the direction of the axis L. Therefore, the heat generated in the coil 21 can be efficiently released to the outside via the metal motor case 10. Therefore, insulation failure due to melting of the insulation film 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 resin-covered portion is reduced, it is possible to reduce the diameter, weight, and cost.

The surface of the sealing resin body 70 on the side La of the body portion 72 facing the direction of the axis L of the motor case 10 is a flange surface 77 for attaching the mixture damper. The flange surface 77 is formed by a plane orthogonal to the axial direction of the motor housing 10, and when the motor housing 10 is inserted into, for example, an opening portion of the air flow control valve, the flange surface is brought into close contact with a planar attachment surface on the peripheral edge of the opening portion, and air tightness is maintained via a sealing member such as an O-ring.

(Structure of terminal pin 80 and terminal block 45, etc.)

Fig. 5 is a perspective view of the terminal block 45 and the like shown in fig. 4 as viewed from the other side Lb in the direction of the axis L. Fig. 6 is a bottom view of the terminal block 45 and the like shown in fig. 4 as viewed from the other side Lb in the direction of the axis L. Fig. 7 is a side view of the terminal block 45 and the like shown in fig. 4, as viewed from the second end portion 82 side. Fig. 8 is a cross-sectional view of the terminal block 45 and the like shown in fig. 4, cut at a position where the terminal pin 80 passes.

As shown in fig. 5, 6, 7, and 8, the terminal pin 80 is a metal square bar, and the cross section of the terminal pin 80 is a quadrangle. The terminal pin 80 includes a first portion 83 extending linearly in the first direction X, a second portion 86 bent at an end of the first portion 83 and extending along one side La in the direction of the axis L, and a third portion 87 bent at an end of the second portion 86 at one side La in the direction of the axis L and extending opposite to the first portion 83 in the first direction X. Thus, the terminal pin 80 has a bent portion 836 between the first portion 83 and the second portion 86, and a bent portion 867 between the second portion 86 and the third portion 87. In the present embodiment, the first portion 83 is formed with the crush portion 830 that partially thickens the thickness of the terminal pin 80, and the cross section of the crush portion 830 is also substantially quadrangular.

In the present embodiment, the end of the first portion 83 on the side opposite to the second portion 86 is a first end 81 for coil wire connection, and the end of the third portion 87 is a second end 82 for external connection. Therefore, the second end 82 for external connection is positioned on the one side La in the direction of the axis L with respect to the bottom 450 of the terminal block 45. Therefore, since the second end portion 82 can be electrically connected to the outside at the position on the one side La in the axis L direction from the bottom portion 450 of the terminal block 45, the same effect as that of shortening the dimension in the axis L direction of the motor 1 is obtained.

The terminal receiving grooves 48 are arranged in the second direction Y on the terminal block 45 corresponding to the configuration of the terminal pins 80. In the present embodiment, the terminal accommodating groove 48 includes a first groove 481 and a second groove 482, the first groove 481 extends in the first direction X at the bottom 450 of the other side Lb of the terminal block 45 in the direction of the axis L and holds the first portion 83 of the terminal pin 80 inside, and the second groove 482 holds the second portion 86 inside at the side surface 452 of the terminal block 45 on which the second portion 86 of the terminal pin 80 is located. Therefore, when the connector is connected to the second end portion 82, even if a force in the first direction X is applied to the second end portion 82, since the second portion 86 of the terminal pin 80 is supported by the bottom of the second groove portion 482, the terminal pin 80 can be prevented from moving in the first direction X. The bottom of the first groove 481 and the portion where the flattened portion 830 of the terminal pin 80 is located are the recesses 481 a.

In the bottom 450 of the terminal block 45, the portions located between the first grooves 481 are rib-shaped protrusions 47, and groove-shaped recesses 470 are formed in the protrusions 47. The concave portion 470 is divided into a first concave portion 471 and a second concave portion 472, and a wall portion is present between the first concave portion 471 and the second concave portion 472. The wall portion is provided at a position overlapping the thrust bearing portion 95 shown in fig. 3 in the direction of the axis L.

(constitution of cover 60)

In fig. 4 again, the cover 60 is a resin molded product, and includes an opposing portion 61, a first protruding portion 62, and a second protruding portion 63, the opposing portion 61 facing the side surface 451 of the terminal block 45, the first protruding portion 62 protruding from an end of one side La in the direction of the axis L of the opposing portion 61 toward the one side La in the direction of the axis L, and the second protruding portion 63 protruding from an end of the other side Lb in the direction of the axis L of the opposing portion 61 toward the terminal block 45. The first projecting portion 62 has a projecting portion 621 projecting toward one side La in the direction of the axis L. Therefore, when the cover 60 is pushed toward the terminal block 45 so that the projection 621 enters the inside of the opening 111 of the motor case 10, the projection 621 is fitted into the notch 456a of the flange 456 of the terminal block 45, and the first projection 62 is fitted into the recess 453a of the lid 453. In this way, the cover 60 is positioned on the motor case 10 and the terminal block 45. In this state, the second protruding portion 63 overlaps a part of the bottom portion 450 of the terminal block 45 from the other side Lb in the direction of the axis L.

On a wall surface of the facing portion 61 facing the side surface 451, a recess 611 into which the first end portions 81 of the four terminal pins 80 are inserted is formed so that the first end portions 81 do not abut against the cover 60. The second projecting portion 63 is formed with a plurality of plate portions 64 projecting toward one side La in the direction of the axis L, and when the second projecting portion 63 overlaps a part of the bottom portion 450 of the terminal block 45 from the other side Lb in the direction of the axis L, the plate portions 64 overlap the first portion 83 located inside the first groove portion 481. In this state, the other portions of the terminal pins 80 are exposed from the cover 60, but when the sealing resin body 70 is provided, the portions of the terminal pins 80 exposed from the cover 60, except for the portions covered by the cover 60 and the second end 82, are covered with the sealing resin body 70.

(detailed construction of terminal housing groove 48)

Again in fig. 5, 6, 7 and 8, the terminal receiving groove 48 corresponds to the thickness (width) of the terminal pin 80 except for the expanded portion 480 to be described below, and the terminal pin 80 is held in the terminal receiving groove 48 when the terminal pin 80 is inserted into the terminal receiving groove 48.

However, when the terminal pin 80 is bent between the first portion 83 and the second portion 86 in the manufacturing of the terminal pin 80, the bent portion 836 expands due to deformation during bending, and the width is locally widened. In the present embodiment, the portion that accommodates the bending portion 836 between the first groove portion 481 and the second groove portion 482 is the expanded portion 480 having a wider groove width. More specifically, in the expanded portion 480,

recesses

486a, 487a recessed in a direction away from each other are formed in the

side walls

486, 487 of the terminal accommodating groove 48 facing each other, and the width of the expanded portion 480 is wider than the other portions of the terminal accommodating groove 48.

Therefore, even when the groove width of the portion of the first groove 481 or the like holding the portion of the terminal pin 80 other than the bent portion 836 is configured to be equal to the thickness of the portion of the terminal pin 80 other than the bent portion 836 to hold the terminal pin 80 in the terminal accommodating groove 48, the terminal pin 80 can be smoothly inserted into the terminal accommodating groove 48.

In the present embodiment, the first groove 481, from the portion that accommodates the portion of the first portion 83 adjacent to the bend 836 to the second groove 482, is an expanded portion 480. Therefore, the terminal pins 80 can be smoothly inserted into the terminal receiving grooves 48. In the present embodiment, the entire second groove portion 482 is an expanded portion 480. Therefore, even in the case where the width of the bent portion 867 between the second portion 86 and the third portion 87 is widened, the terminal pin 80 can be smoothly inserted into the terminal receiving groove 48.

The expanded portion 480 reaches the groove bottom portion 489 from the opening edge 488 or the vicinity of the opening edge 488 of the terminal accommodating groove 48. Therefore, the terminal pins 80 can be smoothly inserted into the groove bottom portions 489 of the terminal accommodation grooves 48.

(other embodiments)

In the above embodiment, the case where the bending portion 836 is provided on the second end portion 82 side with respect to the first portion 83 was described as an example, but the present invention is also applicable to the case where the bending portion 836 is provided on the first end portion 81 side with respect to the first portion 83. In this case, the expanded portion 480 is provided on the side of the side surface 451 of the terminal accommodating groove 48.

In addition, the bent portion 836 may be provided on the second end portion 82 side with respect to the first portion 83, and the bent portion 836 may be provided on the first end portion 81 side with respect to the first portion 83, and in this case, the expanded portion 480 may be provided in a portion of the terminal accommodation groove 48 that accommodates the bent portion 836 on the first end portion 81 side and the bent portion 836 on the second end portion 82 side.

In the above embodiment, the motor 1 is a stepping motor, but the present invention can be applied to other types of motors. In the above embodiment, the present invention is applied to the motor 1 having the sealing resin body 70, but the present invention may be applied to the motor 1 not provided with the sealing resin body 70.

Claims

1. An electric motor, comprising:

a stator;

a rotor that is opposed to the stator and is rotatable about an axis;

a motor case that covers the stator from one side in the axis direction;

a terminal pin including a first portion extending linearly in a first direction intersecting the axial direction, a second portion bent at an end of the first portion and extending to the one side in the axial direction, and a third portion bent at an end of the second portion on the one side in the axial direction and extending to a side opposite to the first portion in the first direction; and

a terminal block that overlaps the motor case from the other side in the axial direction and that is formed with a terminal accommodating groove that includes a first groove portion that holds the first portion inside at a bottom portion located on the other side in the axial direction and a second groove portion that holds the second portion inside at a side surface facing the first direction,

a portion between the first groove portion and the second groove portion, in which the bent portion between the first portion and the second portion is accommodated, is an expanded portion having a wider groove width.

2. The motor according to claim 1,

the first groove portion, a portion of the first portion that accommodates a portion adjacent to the curved portion, and the second groove portion are the expanded portion.

3. The motor according to claim 2,

the second groove portion is the expansion portion as a whole.

4. The motor according to claim 1,

the expanded portion reaches the bottom of the terminal housing groove from the opening edge or the vicinity of the opening edge of the terminal housing groove.

5. The motor according to any one of claims 1 to 4,

in the terminal pin, a first end portion as an end portion of the terminal pin on a side opposite to the third portion is used for coil wire connection, and a second end portion as an end portion of the third portion is used for external connection.

6. The motor according to claim 5, characterized by having:

a cover disposed so as to cover the first end portion; and

and a sealing resin member that is provided so as to cover the terminal block and the cover from the other side in the axial direction and that covers a side surface of the motor case, the sealing resin member including a wall surface from which the second end portion protrudes.

7. A valve body driving device provided with the motor according to any one of claims 1 to 6, comprising:

a rotating shaft provided on the rotor and having a spiral groove formed on an outer circumferential surface thereof;

a valve core; and

a feed screw mechanism that converts rotation of the rotary shaft into a force that causes the valve element to move linearly.