JP2017034742A - motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor capable of suppressing that a member entering from an opening portion of a connector insertion portion reaches a part near a terminal block.SOLUTION: In a motor 1, a cover 9 covering a terminal block 35 and a terminal pin 8, is equipped with a partition wall portion 93 which is positioned on one side in a motor axis L direction(a first direction L1) to a first part 81 of the terminal pin 8; and a housing portion 92 which covers the first part 81 of the terminal pin 8 on the other side in the motor axis L direction (a second direction L2), and covers a second part 82 of the terminal pin 8 on the outer side in a diametrical direction. The housing portion 92 configures a connector insertion portion 90 opening toward the first direction L1 side between the housing portion 92 and the partition wall portion 93. A plurality of projecting portions 96 is projected out from the partition wall portion 93 toward the second direction L2 side. Therefore, even if foreign substances such as metallic members enter from an opening portion of the connector insertion portion 90, the further entry of the foreign substances is intercepted by the projecting portions 96.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a motor in which a cover having a connector insertion portion opened on one side in the motor axial direction is attached to a motor body.

  In a motor in which a connector insertion portion is opened on one side (first direction side) in the motor axial direction on the side surface of the motor body, first, a first portion projecting radially outward to a terminal pin projecting from the side surface of the motor body And a second portion bent toward the first direction at the tip of the first portion. Moreover, the cover provided with the connector insertion part is fixed to the side surface of the motor body. The cover has a partition wall portion located on the first direction side with respect to the first portion, the first portion is covered with the other side in the motor axial direction (second direction side), and the second portion is radially outside. A housing portion to be covered is provided, and a connector insertion portion in which the second portion of the terminal pin is located is formed between the partition wall portion and the housing portion (see Patent Document 1).

JP 2014-204595 A

  In the motor described in Patent Document 1, in the state before the connector member is inserted into the connector insertion portion, inside the cover, the opening of the connector insertion portion and the vicinity of the terminal block are between the second portion and the partition portion, The first portion and the partition wall are in communication with each other. For this reason, if a foreign material such as a metal member enters through the opening of the connector insertion portion by mistake, the foreign material may reach the vicinity of the terminal block and break the coil wire.

  In view of the above problems, an object of the present invention is to provide a motor that can suppress a member that has entered from an opening of a connector insertion portion from reaching a terminal block.

  In order to solve the above-described problems, a motor according to the present invention includes a motor body including a rotor and a stator, a terminal block provided on the radially outer side of the motor body, and a direction along the circumferential direction of the motor body. A plurality of terminal pins arranged along a certain width direction and having coil wires electrically connected thereto, and a cover fixed to the motor body so as to cover the terminal pins, the plurality of terminal pins being A first portion protruding radially outward from the terminal block; and a second portion bent in a first direction that is one side of the motor axial direction from a tip portion of the first portion; The partition portion located on the first direction side with respect to the first portion, the first portion is covered with the second direction side which is the other side in the motor axial direction, and the second portion is radially outer side And the first partition between the partition walls. And a housing portion that constitutes a connector insertion portion that opens toward the opposite side, and the cover has a plurality of protrusions that protrude from the partition toward the second direction side along the width direction. It is characterized by being provided.

In the present invention, in the state before the connector member is inserted into the connector insertion portion, inside the cover, the opening of the connector insertion portion and the vicinity of the terminal block are between the second portion and the partition portion, and the first portion. Although it communicates through between the partition walls, a plurality of protrusions protrude from the partition wall toward the second direction. For this reason, even if a foreign material such as a metal member enters by mistake from the opening of the connector insertion portion, further intrusion of the foreign material is blocked by the protruding portion. For this reason, since it can avoid that a foreign material reaches the terminal block vicinity, it can suppress that a coil wire is disconnected or damaged by a foreign material.

  In the present invention, it is preferable that the plurality of projecting portions project to a position overlapping on the radially inner side between the second portions of adjacent terminal pins among the plurality of terminal pins. According to such a configuration, even when a foreign material such as a metal member enters from the opening of the connector insertion portion, further intrusion of the foreign material is blocked by the second portion and the protruding portion of the terminal pin. For this reason, since it can avoid that a foreign material reaches the terminal block vicinity, it can suppress more that a coil wire is disconnected by a foreign material.

  In the present invention, it is preferable that the plurality of protrusions have elasticity in the radial direction. According to such a configuration, even when the second portion of the terminal pin comes into contact with the protruding portion when the cover is fixed to the motor body, the terminal pin is not easily deformed.

  In the present invention, it is preferable that an interval between adjacent protrusions among the plurality of protrusions is wider than a diameter of the second portion. According to this structure, when fixing a cover to a motor main body, the 2nd part of a terminal pin passes between protrusion parts. For this reason, the operation | work which fixes a cover to a motor main body can be performed efficiently.

  The present invention is effective when applied when the coil wire extends from the first direction side to the second direction side and passes through the radially outer side of the terminal block and is connected to the terminal pin. Is. When the coil wire extends from the first direction side to the second direction side and passes through the radially outer side of the terminal block and is connected to the terminal pin, the foreign matter entering from the opening of the connector insertion portion However, according to the present invention, such a contact can be avoided by the protruding portion.

  In the present invention, on the radially outer surface of the partition wall, a connector retaining hook is provided at a position spaced in the first direction with respect to both sides of the portion where the plurality of protrusions are arranged. The aspect which is can be employ | adopted. According to such a configuration, since the hook is provided at a position separated in the width direction, the connector member can be reliably supported.

  In the present invention, the partition wall is provided with a slit extending from the outer edge of the protrusion located at the end of the plurality of protrusions to the hook extending in the first direction. Preferably it is.

  In the present invention, it is preferable that the cover is provided with a guide surface that is in contact with a portion protruding radially outward from the motor body from a direction intersecting the radial direction. According to this structure, when attaching a cover to a motor main body, it can suppress that a cover contacts a terminal pin. Therefore, deformation of the terminal pin can be suppressed.

  In the present invention, in the state before the connector member is inserted into the connector insertion portion, inside the cover, the opening of the connector insertion portion and the vicinity of the terminal block are between the second portion and the partition portion, and the first portion. Although it communicates through between the partition walls, a plurality of protrusions protrude from the partition toward the second direction. For this reason, even if a foreign material such as a metal member enters by mistake from the opening of the connector insertion portion, further intrusion of the foreign material is blocked by the protruding portion. For this reason, since it can avoid that a foreign material reaches the terminal block vicinity, it can suppress that a coil wire is disconnected or damaged by a foreign material.

It is explanatory drawing which shows the whole structure of the motor to which this invention is applied. It is explanatory drawing which expanded the terminal block vicinity of the motor to which this invention was applied, and was seen from the 1st direction. It is YZ sectional drawing of the cover etc. of the motor to which this invention is applied. It is explanatory drawing of the cover used for the motor to which this invention is applied. It is a fragmentary sectional view of the cover used for the motor to which the present invention is applied. It is explanatory drawing which shows the positional relationship of the cover and terminal pin in the motor to which this invention is applied.

  A motor to which the present invention is applied will be described with reference to the drawings. In this embodiment, the motor 1 is configured as a geared motor. In such a motor 1, both the rotation center axis of the rotor 5 and the rotation center axis of the output shaft 50 can be regarded as motor axes, but in the following description, the rotation center axis of the output shaft 50 is referred to as a motor axis L. explain. Further, in the following description, in describing the cover 9 and the like, the three directions orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, and the direction in which the motor axis L extends is the Z-axis direction. The one side in the motor axis L direction is the first direction L1, and the other side in the motor axis L direction is the second direction L2. In this embodiment, the first direction L1 corresponds to the side opposite to the side from which the output shaft 50 protrudes (opposite output side), and the second direction L2 corresponds to the side from which the output shaft 50 protrudes (output side). Equivalent to.

  The X-axis direction corresponds to the width direction along the circumferential direction of the motor body 1 a in the cover 9, and the Y-axis direction corresponds to the radial direction of the motor body 1 a in the cover 9. In the drawings referred to below, X1 is attached to one side in the X-axis direction, X2 is attached to the other side in the X-axis direction, Y1 is attached to one side in the Y-axis direction, and Y2 is attached to the other side, Z1 is attached to one side in the Z-axis direction, and Z2 is attached to the other side in the Z-axis direction. Here, one side Y1 in the Y-axis direction corresponds to the radially inner side, and the other side Y2 in the Y-axis direction corresponds to the radially outer side.

(overall structure)
FIG. 1 is an explanatory diagram showing the overall configuration of a motor 1 to which the present invention is applied. FIGS. 1A and 1B are a perspective view of the motor 1 viewed from the second direction L2, and an exploded perspective view thereof. It is. FIG. 2 is an explanatory view of the vicinity of the terminal block 35 of the motor 1 to which the present invention is applied, as viewed from the first direction L1, and FIGS. It is explanatory drawing of the state covered, and explanatory drawing of the state which removed the cover 9 from the motor main body 1a. 3 is a YZ sectional view of the cover 9 and the like of the motor 1 to which the present invention is applied. FIGS. 3A and 3B are views of the YZ when the cover 9 and the like are cut at positions passing through the terminal pins 8, respectively. It is a YZ cross section when the cover 9 or the like is cut at a position passing through the cross section and the terminal pin 8. In FIG. 1B, only a portion of the first coil wire 36 and the second coil wire 37 wound around the first coil bobbin 31 and the second coil coil bobbin 32 is shown. The illustration of the end and the end of the second coil wire 37 is omitted.

  As shown in FIG. 1, the motor 1 of this embodiment is a geared motor using a stepping motor. In the motor 1, the motor body 1 a includes a bottomed cylindrical metal motor case 2, an end plate 61 that closes the opening end of the motor case 2, a cylindrical stator 3 disposed inside the motor case 2, and a stator 3. Between the base plate 65, the base plate 65, and the end plate 61 disposed on the rotor 5 and the end plate 61 in the first direction L <b> 1 (one side in the motor axis L direction, opposite to the output side). And the output shaft 50 projecting from the end plate 61 to the second direction L2 side (the other side in the motor axis L direction, the output side). The output shaft 50 is formed with a gear 74 that meshes with the final gear 71 among the gears 71 of the reduction gear train 7.

The stator 3 is wound with a first coil bobbin 31 wound with a first coil wire 36 constituting a first coil for A phase and a second coil wire 37 constituting a second coil for B phase. A second coil bobbin 32 is provided, and the first coil bobbin 31 and the second coil bobbin 32 are arranged so as to overlap in the motor axis L direction. The first coil bobbin 31 is disposed on the output side (second direction L2 side), and the second coil bobbin 32 is disposed on the counter-output side (first direction L1 side). The first coil bobbin 31 is a resin molded product, and includes a pair of flange portions 311 and 312 at both ends of a cylindrical body around which the first coil wire 36 is wound. The second coil bobbin 32 is a resin molded product that is substantially the same as the first coil bobbin 31, and includes a pair of flange portions 321 and 322 at both ends of a cylindrical body around which the second coil wire 37 is wound.

  In the stator 3, an A-phase outer stator core 41 is disposed so as to overlap the flange portion 311 of the first coil bobbin 31, and an A-phase inner stator core 42 is disposed so as to overlap the flange portion 312 of the first coil bobbin 31. Yes. Although not shown, in the outer stator core 41 and the inner stator core 42, a plurality of pole teeth are bent from the inner peripheral edge of the flange-shaped annular portion toward the motor axis L direction. The pole teeth of the stator core 42 are alternately arranged in the circumferential direction along the inner peripheral surface of the first coil bobbin 31. The B-phase outer stator core 43 is disposed so as to overlap the flange portion 321 of the second coil bobbin 32, and the B-phase inner stator core 44 is disposed so as to overlap the flange portion 322 of the second coil bobbin 32. Also in the outer stator core 43 and the inner stator core 44 for the B phase, as in the outer stator core 41 and the inner stator core 42 for the A phase, a plurality of pole teeth 45 are bent in the motor axis L direction, and the pole teeth 45 of the outer stator core 43 are. The pole teeth 45 of the inner stator core 44 are alternately arranged in the circumferential direction along the inner circumferential surface of the second coil bobbin 32. In this embodiment, the outer stator core 43 is composed of a bottom plate portion of the motor case 2.

  Inside the stator 3, a rotor 5 having a permanent magnet (not shown) fixed on the outer peripheral surface is disposed. The rotor 5 is rotatably supported by a support shaft 511. A pinion 510 is formed on the outer peripheral surface of the output side end of the rotor 5. The support shaft 511 is supported by the bottom plate portion of the motor case 2 and the end plate 61.

  An annular ground plate 65 is disposed on the end surface of the stator 3 on the second direction L2 side, and two support plate portions are directed from the end of the ground plate 65 toward the second direction L2. 657 protrudes. Further, a support plate portion 650 that supports a terminal block 35 to be described later on the radially inner side protrudes from the end portion of the base plate 65 toward the second direction L2.

  A circular through hole 615 is formed in the end plate 61, and the through hole 615 protrudes the output side end portion of the output shaft 50 in the second direction L2. A cylindrical portion 616 that rotatably supports the output shaft 50 is formed around the through hole 615. A shaft hole is formed in the base plate 65 at a position facing the shaft holes 611, 612, 613, and 614 of the end plate 61, and between the base plate 65 and the end plate 61 using the shaft hole, Support shafts of a plurality of gears 71 constituting the reduction gear train 7 are held. Further, a projecting portion 618 for attaching the motor 1 to the motor device is formed from opposite ends of the end plate 61, and a hole 618a is formed in the projecting portion 618. Further, the end plate 61 is formed with a hole 617 into which the tip of the support plate portion 657 of the base plate 65 is fitted, and a receiving portion 69 that supports the support shaft 511.

  In the motor 1 configured as described above, it is necessary to supply power to the first coil wire 36 and the second coil wire 37 of the motor body 1a. In order to perform such power feeding, in the motor 1 of this embodiment, the terminal block 35 is formed on the radially outer side (the other side Y2 in the Y-axis direction) of the flange portion 311 of the first coil bobbin 31. The terminal block 35 holds a total of five terminal pins 8, and the end portions of the first coil wire 36 and the second coil wire 37 are connected to the terminal pin 8. In this embodiment, the terminal pins 8 are arranged with a predetermined gap along the X-axis direction (width direction).

A resin cover 9 is attached to the motor body 1 a so as to cover the terminal block 35 and the terminal pins 8. In this embodiment, the motor case 2 is formed with notches 229 extending in the motor axis L direction, while engaging claws 915 are formed on both sides of the cover 9 in the circumferential direction. The cover 9 is fixed to the motor case 2 by entering from the inside of the notch 229 and engaging with the motor case 2. The end plate 61 is formed with two holes 619, while the cover 9 is formed with two protrusions 910 that protrude in the second direction L <b> 2. Therefore, when engaging the engaging claw 915 with the motor case 2, the cover 9 can be fixed at a predetermined position of the motor main body 1 a by fitting the protrusion 910 into the hole 619.

  When the cover 9 is provided in this way, as shown in FIGS. 2 and 3, the cover 9 opens toward the first direction L1 on the other side Y2 (radially outer side) of the motor body 1a in the Y-axis direction. The connector insertion portion 90 is configured, and the connection portions 80 of the five terminal pins 8 are positioned in the connector insertion portion 90.

(Detailed configuration of terminal pin 8 and terminal block 35)
As shown in FIGS. 1, 2, and 3, each of the five terminal pins 8 has a connection portion 80 that extends to one side Z <b> 1 in the Z-axis direction inside the connector insertion portion 90. A connector member (not shown) is connected to the connection portion 80. In this embodiment, each of the five terminal pins 8 has a structure in which one metal pin is bent, and includes a first portion 81 extending radially outward from the terminal block 35, and a first portion. A second portion 82 bent in the first direction L <b> 1 is provided as a connection portion 80 from the tip of 81. For this reason, in any of the five terminal pins 8, a bent portion 86 that is bent at 90 ° is formed between the first portion 81 and the second portion 82. Each of the five terminal pins 8 has a third portion 83 that is obliquely bent in the second direction L2 at the end of the first portion 81 opposite to the side where the second portion 82 is located. A bent portion 87 is formed between the first portion 81 and the third portion 83.

  Of the five terminal pins 8, the terminal pin 8 located on the one side X <b> 1 in the X-axis direction is for common use, and the first portion 81 is shorter than the other terminal pins 8. For this reason, the bent portions 87 of the five terminal pins 8 are arranged in a line in the X-axis direction, but the bent portions 87 of the terminal pins 8 located on one side X1 in the X-axis direction are the other terminal pins. It is located on the radially outer side (the other side Y2 in the Y-axis direction) compared to the eight bent portions 87. In contrast, the bent portions 86 of the five terminal pins 8 are arranged in a line in the X-axis direction.

  The terminal block 35 is formed as a thick portion projecting on the side Z2 in the second direction L2 on the outer side in the radial direction of the flange portion 311 of the first coil bobbin 31, and is cut out in the motor case 2 shown in FIG. It is located on the second direction L2 side inside 229. Further, the flange portion 321 of the first coil bobbin 31 is formed with two convex portions 315 protruding outward in the radial direction and spaced apart in the X-axis direction. On the flange portion 322 of the second coil bobbin 32, convex portions 325 protruding outward in the radial direction are formed at two locations separated in the X-axis direction, and the convex portion 325 protrudes on the side Z2 in the second direction L2. It is formed as a thick part. The convex portion 325 is located along with the convex portion 315 on the first direction L1 side inside the notch 229 of the motor case 2 shown in FIG.

  The terminal block 35 holds the first portions 81 of the five terminal pins 8 bent at a plurality of locations. Such a configuration is formed by integrally molding the first coil bobbin 31 in a state where the five terminal pins 8 are linearly extended and then bending the five terminal pins 8 into the five terminal pins 8. be able to. In addition, when the first coil bobbin 31 is resin-molded, a hole for holding the first portion 81 of the terminal pin 8 is formed, and the five terminal pins 8 are inserted into the hole in a state of extending linearly. Thereafter, it can be formed by bending the five terminal pins 8.

  As shown in FIG. 1B, a groove-like recess 352 is formed on the radially inner surface of the terminal block 35, and the bent portion 87 of the terminal pin 8 is located inside the groove-like recess 352. For this reason, the bent portion 87 of the terminal pin 8 does not protrude from the radially inner surface of the terminal block 35. Further, the terminal block 35 is formed with a plurality of grooves 351 that are continuous with the radially outer surface of the terminal block 35 and the end surface in the second direction L2, and the grooves 351 are formed from one side X1 in the X-axis direction. Between the first terminal pin 8 and the second terminal pin 8, between the second terminal pin 8 and the third terminal pin 8, and between the fourth terminal pin 8 and the fifth terminal pin 8. It goes through.

  Accordingly, in the first coil wire 36, the end portion 360 (see FIG. 2B) drawn from between the flange portions 311 and 312 of the first coil bobbin 31 passes through the groove 351 from the first direction L1 side. It extends toward the second direction L 2 and is connected to the third portion 83 of the terminal pin 8. Further, in the second coil wire 37, an end portion 370 (see FIG. 2B) drawn from between the flange portions 321 and 322 of the second coil bobbin 32 is between the convex portions 325 and the convex portions 315. It extends from the first direction L1 side to the second direction L2 side, and is connected to the third portion 83 of the terminal pin 8 through the groove 351.

(Detailed configuration of cover 9)
FIG. 4 is an explanatory diagram of the cover 9 used in the motor 1 to which the present invention is applied. FIGS. 4A and 4B are a perspective view of the cover 9 viewed from the inside in the radial direction, and the cover 9 having a diameter. It is the front view seen from the direction inner side. FIG. 5 is a partial cross-sectional view of the cover 9 used in the motor 1 to which the present invention is applied, and FIGS. 5A and 5B are partial cross-sectional views when the cover 9 is viewed from the second direction L2. FIG. 6 is a partial cross-sectional view of the cover 9 when viewed from the first direction L1. FIG. 6 is an explanatory view showing the positional relationship between the cover 9 and the terminal pin 8 in the motor 1 to which the present invention is applied. FIGS. 6A and 6B are views when the cover 9 is viewed from the inside in the radial direction. FIG. 6 is a partial cross-sectional view of FIG. 5 and a front view of the cover 9 as viewed from the inside in the radial direction. In FIG. 6A, only two of the five terminal pins 8 are shown.

  As shown in FIGS. 4, 5, and 6, the cover 9 includes a rectangular frame portion 91 that covers an outer edge of the notch 229 (see FIG. 1B) of the motor case 2 in which the terminal block 35 is disposed, The partition wall portion 93 positioned on the first direction L1 side with respect to the first portion 81 of the terminal pin 8 outside the frame portion 91 in the radial direction, and the first portion 81 of the terminal pin 8 outside the frame portion 91 in the radial direction. And a housing portion 92 that covers the second direction L2 and covers the second portion 82 radially outward. For this reason, the cover 9 is in an open state on the side where the terminal block 35 is located with respect to the housing portion 92. The housing part 92 is located radially outside the partition wall part 93 and constitutes a connector insertion part 90 that opens toward the first direction L1 with the partition wall part 93. In the connector insertion portion 90 configured as described above, the second portion 82 (connection portion 80) of the terminal pin 8 extending from the terminal block 35 has a radially inner surface of the housing portion 92 and a radially outer surface of the partition wall portion 93. Separated from the surface.

  Of the four side portions 911, 912, 913, and 914 constituting the frame portion 91, a projection 910 is formed on the side portion 911 located in the second direction L2, and located on both sides in the width direction (X-axis direction). Engaging claws 915 are formed on the side portions 913 and 914. In addition, an arc portion 912 a that abuts on the outer peripheral surface of the motor case 2 is formed on the side portion 912 located in the first direction L <b> 1.

(Configuration of the convex portion 95 for preventing the terminal pin 8 from tilting)
On the inner surface 92 a of the cover 9, the base side of the second portion 82 of the terminal pin 8 is both in the extending direction of the first portion 81 (Y-axis direction) and the extending direction of the second portion 82 (Z-axis direction). Convex portions 95 that are supported from a direction perpendicular to the X-axis direction (X-axis direction) are provided. More specifically, a first wall portion 92c is formed on the inner surface of the housing portion 92, and a rib having a rectangular cross section extending in the X-axis direction is provided at an end portion of the first wall portion 92c in the second direction L2. A protrusion 925 is formed. The surface of the rib-shaped protrusion 925 on the first direction L1 side is opposite to the side where the second portion 82 extends with respect to the first portion 81 of the terminal pin 8 (the side in the first direction L1). A second wall portion 925a is formed. Here, a total of four convex portions 95 are provided apart from each other in the X-axis direction at the corner portions of the first wall portion 92c and the second wall portion 925a.

  For this reason, the bent part 86 of the terminal pin 8 is supported by the convex part 95 from the X-axis direction. More specifically, of the plurality of terminal pins 8, the bent portions 86 of the terminal pins 8 other than the terminal pins 8 at both ends are supported by the convex portions 95 from both sides in the X-axis direction. Further, among the plurality of terminal pins 8, the bent portion 86 of the terminal pin 8 located at the end portion on the one side X1 in the X-axis direction is a convex portion protruding from the inner surface of the side portion 914 on the one side X1 in the X-axis direction. 914a and the convex part 95 are supported from both sides in the X-axis direction. Further, among the plurality of terminal pins 8, the bent portion 86 of the terminal pin 8 located at the end portion on the other side X2 in the X axis direction is a convex portion protruding from the inner surface of the side portion 913 on the other side X2 in the X axis direction. It is supported from both sides in the X-axis direction by 913a and the convex portion 95. For this reason, the displacement of the second portion 82 can be effectively suppressed. Therefore, when the connector member is inserted into the connector insertion portion 90, it is possible to avoid a situation in which the second portion 82 of the terminal pin 8 is inclined in the X-axis direction and the connector member cannot be inserted. In particular, in this embodiment, the convex portion 95 supports the bent portion 86 of the first portion 81 and the second portion 82 on the base side of the second portion 82. Therefore, since the root side of the second portion 82 can be reliably supported, the displacement of the second portion 82 can be effectively suppressed. Further, when the cover 9 is provided so as to cover the outside of the terminal block 35, the terminal pins 8 are arranged between the projections 95, between the projections 914 a and 95, and between the projections 913 a and 95. Since the bent portion 86 may be inserted, the second portion 82 can be easily extended to the connector insertion portion 90. Moreover, the convex portion 95 includes a slope 952 that is inclined with respect to the side where the terminal block 35 is located and the extending direction of the second portion 82. For this reason, when the cover 9 is provided so as to cover the outside of the terminal block 35, the terminal pins 8 can be easily inserted between the convex portions 95.

(Configuration of protrusion 96)
In the cover 9, the partition wall portion 93 is located radially inward from the second portion 82 of the terminal pin 8. In addition, the end portion 930 on the second direction L2 side of the partition wall portion 93 is positioned on the first direction L1 side from the end portion 820 in the first direction L1 of the second portion 82 of the terminal pin 8. The partition wall portion 93 has a plate shape, and a rib-like convex portion 931 extending in the width direction along the end portion 930 of the partition wall portion 93 is formed on the radially inner surface of the partition wall portion 93.

  Here, the cover 9 is provided with a plurality of projecting portions 96 projecting from the partition wall portion 93 toward the second direction L2 along the X-axis direction (width direction). In this embodiment, the projecting portions 96 are formed at four locations that are separated in the X direction. The end portion 960 on the second direction L2 side of the protruding portion 96 is located on the second direction L2 side from the end portion of the second portion 82 of the terminal pin 8 in the first direction L1. Each of the plurality of projecting portions 96 overlaps the second portion 82 of the adjacent terminal pin 8 among the plurality of terminal pins 8 in the radial direction. In other words, each of the plurality of projecting portions 96 projects to a position where it overlaps radially inward between the second portions 82 of the adjacent terminal pins 8 among the plurality of terminal pins 8. Therefore, in the connector insertion portion 90, the radially inner side is constituted by a plurality of protruding portions 96. In this embodiment, among the plurality of protrusions 96, the interval in the X-axis direction of the slit 961 positioned between the adjacent protrusions 96 is wider than the diameter of the second portion 82 of the terminal pin 8 in the X-axis direction. In this embodiment, the projecting portion 96 has the same thickness as the partition wall portion 93 and has elasticity that can be deformed in the radial direction.

In order to fix the cover 9 configured in this way to the motor body 1a, the cover 9 is inclined and the second portion 82 of the terminal pin 8 is placed radially outward from the partition wall portion 93 via the slits 935 and 961. Then, the cover 9 is pressed against the motor body 1a. As a result, the engaging claw 915 engages with the edge of the notch 229 of the motor case 2, and the cover 9 is fixed to the motor body 1a.

(Configuration of hook 97)
As shown in FIG. 2, in the cover 9, on the radially outer surface of the partition wall portion 93, the connector is removed at a position spaced in the first direction L <b> 1 with respect to both sides of the portion where the plurality of protruding portions 96 are arranged. Protrusions constituting the hooks 97 for stopping are provided. When such a hook 97 is inserted into the connector insertion portion 90 with a connector member (not shown), an engagement portion (not shown) formed to have a spring property is engaged with the connector member. Prevent omissions. The partition wall 93 is provided with a slit 935 that extends in the first direction L1 from the outer edge of the protrusion 96 positioned at the end of the plurality of protrusions 96 and reaches the hook 97. Yes. Accordingly, the plurality of projecting portions 96 are set to have equal width dimensions by the slits 935 and 961.

(Configuration of guide surfaces 98 and 99)
In the motor main body 1a, the terminal block 35 and the convex portion 325 protrude outward in the radial direction, and the cover 9 has a portion (terminal block 35 and convex portion 325) protruding radially outward from the motor main body 1a in the Y-axis direction. Guide surfaces 98 and 99 that are in contact with each other in a direction intersecting with the (radial direction) are configured by the parts described below.

  First, on the inner surface of the cover 9, rectangular parallelepiped convex portions 980 are formed on both sides in the X direction at positions adjacent to the side portion 912 in the second direction L 2. The surface on the second direction L2 side of the projection 980 is the other side Z2 in the Z-axis direction where the projection 325 of the motor body 1a intersects the Y-axis direction (radial direction) when the cover 9 is fixed to the motor body 1a. It is a guide surface 98 in contact with. For this reason, when the cover 9 is attached to the motor body 1a, the cover 9 is defined at a position in the motor axis L direction of the cover 9, so that the cover 9 and the terminal pin 8 do not easily interfere with each other.

  On the inner surface of the cover 9, a convex portion 990 is formed at a position adjacent to the side portion 914 on one side X1 in the X-axis direction and a position adjacent to the side portion 913 on the other side X2 in the X-axis direction. Yes. When the cover 9 is fixed to the motor main body 1a, the inner surfaces of the convex portions 990 are arranged so that the surfaces on both sides in the X-axis direction of the convex portions 325 of the motor main body 1a and the surfaces on both sides in the X-axis direction of the terminal block 35 are the Y-axis. The guide surface 99 is in contact with one side X1 and the other side X2 in the X-axis direction intersecting the direction (radial direction). For this reason, when the cover 9 is attached to the motor body 1a, the cover 9 is defined at the position in the X-axis direction, so that the cover 9 and the terminal pin 8 do not easily interfere with each other.

(Main effects of this form)
As described above, in the motor 1 of the present invention, the cover 9 has the partition wall 93 positioned on the one side (first direction L1) in the motor axis L direction with respect to the first portion 81 of the terminal pin 8. And a housing portion 92 that covers the first portion 81 of the terminal pin 8 on the other side (second direction L2) in the motor axis L direction and covers the second portion 82 of the terminal pin 8 on the radially outer side. Yes. Moreover, the housing part 92 comprises the connector insertion part 90 opened toward the 1st direction L1 side between the partition parts 93. FIG. For this reason, in the state before inserting the connector member into the connector insertion portion 90, inside the cover 9, the opening of the connector insertion portion 90 and the vicinity of the terminal block 35 are between the second portion 82 and the partition wall portion 93. The first portion 81 and the partition wall portion 93 communicate with each other, but a plurality of protruding portions 96 protrude from the partition wall portion 93 toward the second direction L2. For this reason, as shown by an arrow S in FIG. 3B, even if a foreign material such as a metal member enters by mistake from the opening of the connector insertion portion 90, further intrusion of the foreign material is blocked by the protruding portion 96. . For this reason, since it can avoid that a foreign material reaches the terminal block 35 vicinity, it can suppress that the 1st coil wire 36 and the 2nd coil wire 37 are disconnected and damaged by a foreign material.

Further, the plurality of projecting portions 96 project to a position overlapping between the second portions 82 of the adjacent terminal pins 8 on the radially inner side. For this reason, even when a foreign material such as a metal member enters from the opening of the connector insertion portion 90, further intrusion of the foreign material is blocked by the protruding portion 96. For this reason, since it can avoid that a foreign material reaches the terminal stand 35 vicinity, it can suppress more that the 1st coil wire 36 and the 2nd coil wire 37 are disconnected and damaged by a foreign material.

  In particular, in this embodiment, the end portion 360 of the first coil wire 36 and the end portion 370 of the second coil wire 37 extend from the first direction L1 side to the second direction L2 side, and radially outside the terminal block 35. 3b, as shown by an arrow S in FIG. 3B, when a foreign material such as a metal member enters from the opening of the connector insertion portion 90, the foreign material easily comes into contact with the end portions 360 and 370. According to this embodiment, such contact can be avoided by the protrusion 96. Therefore, it is possible to prevent the first coil wire 36 and the second coil wire 37 from being broken or damaged by the foreign matter.

  In addition, since the plurality of projecting portions 96 have elasticity in the radial direction, even if the second portion 82 of the terminal pin 8 contacts the projecting portion 96 when the cover 9 is fixed to the motor body 1a, the terminal The pin 8 is not easily deformed.

  Further, among the plurality of protrusions 96, the interval between adjacent protrusions 96 (the width of the slit 961) is wider than the diameter of the second portion 82 of the terminal pin 8. For this reason, the second portion 82 of the terminal pin 8 can be passed between the protruding portions 96 when the cover 9 is fixed to the motor body 1a. For this reason, the operation | work which fixes the cover 9 to the motor main body 1a can be performed efficiently.

  On the radially outer surface of the partition wall 93, hooks 97 for retaining the connector are provided at positions spaced in the first direction L1 with respect to both sides of the portion where the plurality of protruding portions 96 are arranged. Yes. For this reason, since the hook 97 is provided in the position spaced apart in the width direction, the connector member can be reliably supported.

  The partition wall 93 is provided with a slit 935 that extends in the first direction L1 from the outer edge of the protrusion 96 positioned at the end of the plurality of protrusions 96 and reaches the hook 97. Yes. Therefore, a slit 935 for passing the second portion 82 of the terminal pin 8 when the cover 9 is attached to the motor body 1a is used as a guide for the engaging portion on the connector member side when the connector member is inserted into the connector inserting portion 90. Can be used as

[Other embodiments]
In the above embodiment, the number of terminal pins 8 is five. However, the present invention may be applied to other numbers of motors. Moreover, in the said embodiment, although the connector insertion part 90 was opened toward the non-output side, you may apply this invention to the motor with which the connector insertion part 90 is opened toward the output side. In this case, the output side corresponds to the first direction, and the non-output side corresponds to the second direction. The present invention is not limited to a stepping motor as long as it uses a connector, and may be applied to other types of motors.

1..Motor, 1a..Motor body, 2..Motor case, 3..Stator, 5..Rotor, 7..Reduction gear train, 8..Terminal pin, 9..Cover, 31..First Coil bobbin, 32 ... second coil bobbin, 35 ... terminal block, 36 ... first coil wire, 37 ... second coil wire, 50 ... output shaft, 80 ... connection part, 81 ... first part, 82 .. Second part, 90 .. Connector insertion part, 92 .. Housing part, 93 .. Bulkhead part, 95 .. Projection part, 96 .. Projection part, 97 .. Hook, 98, 99. 325 .. Convex part, 935 .. slit, 961 .. slit, L .. motor axis, L1 .. first direction, L2 .. second direction

Claims (8)

A motor body having a rotor and a stator;
A terminal block provided on the radially outer side of the motor body;
A plurality of terminal pins arranged along a width direction that is a direction along a circumferential direction of the motor body, and the coil wires are electrically connected;
A cover fixed to the motor body so as to cover the terminal pins;
Have
Each of the plurality of terminal pins includes a first portion protruding radially outward from the terminal block, a second portion bent in a first direction that is one side of the motor axial direction from a tip portion of the first portion, With
The cover covers the partition portion positioned on the first direction side with respect to the first portion, the first portion is covered with the second direction side which is the other side in the motor axial direction, and the second portion is covered with the cover. A housing portion that covers a radially outer side and constitutes a connector insertion portion that opens toward the side of the first direction with the partition wall portion; and
The motor according to claim 1, wherein the cover is provided with a plurality of projecting portions projecting from the partition portion toward the second direction side along the width direction.   2. The motor according to claim 1, wherein the plurality of projecting portions project to a position that overlaps radially between the second portions of the adjacent terminal pins among the plurality of terminal pins.   The motor according to claim 1, wherein the plurality of projecting portions have elasticity in a radial direction.   4. The motor according to claim 1, wherein among the plurality of protrusions, an interval between adjacent protrusions is wider than a diameter of the second portion.   The said coil wire is extended from the said 1st direction side to the said 2nd direction side, and is connected to the said terminal pin through the radial direction outer side of the said terminal block. The motor according to any one of 4.   On the outer surface in the radial direction of the partition wall, a connector retaining hook is provided at a position spaced in the first direction with respect to both sides of the portion where the plurality of protrusions are arranged. The motor according to any one of claims 1 to 5, characterized in that:   The partition wall is provided with a slit extending from the outer edge of the protrusion located at the end of the plurality of protrusions to the hook extending in the first direction. The motor according to claim 6.   8. The guide according to claim 1, wherein the cover is provided with a guide surface that is in contact with a portion protruding radially outward from the motor body from a direction intersecting the radial direction. 9. Motor.

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