KR101957042B1 - Motor - Google Patents

Abstract

[PROBLEMS] To suppress the variation of the height of the lead wire (24) drawn out from the core holder (11) and wired in the axial direction L to shorten the wiring length of the lead wire (24).
The motor 1 is provided with a penetration portion 41 in a conventional core holder 11 (cylindrical portion), a lead wire holder 42 is fixed to the penetration portion 41, and a lead wire lead-out portion 40 Is formed. A pushing member 43 is fixed to the lead wire holder 42. The pressing member 43 has a lead wire pressing portion 432 opposed to the wiring hole 422 formed in the lead wire holder 42. The lead wire 24 drawn out from the wiring hole 422 is bent by the lead wire pressing portion 432 when bent in the axial direction L of the core holder 11 and drawn out to the output side L1 ) Are regulated.

Description

Motor {MOTOR}

The present invention relates to a motor in which a lead wire is drawn out from a motor case.

In a motor in which a stator and a rotor are housed in a motor case, a power supply lead wire for the stator coil is drawn out from a penetrating portion penetrating the motor case. Patent Document 1 discloses a motor in which a lead bush (lead wire holder) is provided in a lead-out hole (through-hole) formed in an outer frame (motor case). In Patent Document 1, the lead bush has the same number of wiring holes (lead wire through holes) as the number of lead wires. The lead wires pass through the lead wire through holes one by one and are drawn out to the outside. The lead wire through-hole penetrates the lead bushing in the radial direction of the motor. Therefore, the lead wire is drawn radially outward from the side surface of the motor.

Japanese Patent Application Laid-Open No. 9-308175

In the case of a structure in which the lead wire is drawn out from the side surface of the motor in the radial direction, when the lead wire is wired in the axial direction of the motor or bent from the root to change the lead direction of the lead wire, the height of the lead wire may fluctuate. If the height of the lead wire is changed, there is a possibility that the length required for wiring of the lead wire becomes long. In addition, there is a fear that the amount of protrusion of the lead wire protruding outward in the radial direction from the side surface of the motor becomes large. If the amount of protrusion of the lead wire is large, the arrangement space of the motor becomes large.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to suppress the variation of the height of the lead wire drawn out from the motor case, to shorten the length required for wiring of the lead wire and to suppress the amount of lead wire projecting to the outside of the motor case I have to.

According to an aspect of the present invention, there is provided a motor control apparatus including a rotor and a stator, a motor case accommodating the rotor and the stator, a lead wire holder mounted on the motor case, and a pressing member provided on the lead wire holder, And a pressing member fixing part integrally formed with the seat part, wherein the pressing member has a lead wire pressing part opposed to the wiring hole penetrating the lead wire holder .

According to the present invention, the lead wire holder is fixed to the motor case, and the pressing member fixed to the lead wire holder has the lead wire pressing portion opposed to the wiring hole formed in the lead wire holder. Thereby, the lead wire drawn out from the wiring hole can be bent out in parallel with the surface on which the lead wire holder is provided. Further, the lead wire pressing portion can restrict the height of the lead wire bent out of the wiring hole and bent from the wiring hole. Therefore, the height of the root of the lead portion of the lead wire can be suppressed from varying. Further, by reducing the height of the lead wire, the length required for wiring of the lead wire can be shortened, and the amount of the lead wire projecting to the outside of the motor case can be suppressed. Further, in the case of pulling out a plurality of lead wires, the height thereof can be aligned, and the necessary length can be aligned in the wiring of a plurality of lead wires.

In the present invention, it is preferable that the motor case has a tubular portion surrounding the outer periphery of the rotor and the stator, the lead wire holder is provided in the tubular portion, and the wiring hole is perpendicular to the axial direction of the tubular portion In a direction in which the light-emitting layer is formed. In this way, when the lead wire drawn out from the wiring hole is bent in the axial direction and wired along the tubular portion, the lengths of the plurality of lead wires can be aligned. Further, as in the case of arranging the wiring holes in the axial direction, it is possible to prevent the length required for wiring of some lead wires from becoming long. Therefore, compared with the case where the wiring holes are arranged in the axial direction, the total length required for the wiring of the lead wires can be shortened.

In the present invention, it is preferable that a heat shrink tube for binding a plurality of lead wires passing through the plurality of wiring holes is provided, and the rim of the pressing member is located at a position covering the heat shrink tube. By doing so, a plurality of lead wires can be gathered together by the heat shrinkable tube. Further, the lead wire can be protected by the heat shrinkable tube, and the lead wire can be prevented from being damaged by the contact with the rim of the pressing member.

In the present invention, the seat portion is plate-like, the pressing member fixing portion is a wall portion projecting from the seat portion and surrounding the outer periphery of the wiring hole, and a part of the wall portion in the circumferential direction is a projection height And a gap through which the lead wire passes is formed between the stepped portion and the lead wire pressing portion. In this way, when the lead wire is drawn out from the gap, the position of the lead wire can be regulated by the wall portion. Therefore, the position of the lead wire can be prevented from fluctuating, and a plurality of lead wires can be gathered together and taken out.

In the present invention, it is preferable that the lead wire holder has a convex portion fitted to the penetration portion formed in the motor case, and a mold resin portion covering the stator is provided on the inner circumference of the motor case. In this case, the penetration can be blocked by the convex portion. Therefore, the resin for forming the mold resin portion is less likely to leak from the gap between the lead wire holder and the penetration portion.

In the present invention, it is preferable that the molded resin portion is disposed on the inner circumferential side of the position where the lead wire holder is installed. In this way, the lead wire to be wired from the stator to the lead wire holder is covered with the resin for the mold. Therefore, the heat dissipation effect can be enhanced against the heat generated from the stator covered by the resin for the mold.

In the present invention, the wiring hole is opened at the front end surface of the convex portion, and the front end surface is provided with a peripheral wall surrounding an area where the wiring hole is opened, and a lead wire passing through the wiring hole, It is preferable to provide an adhesive disposed in the gap. By doing so, it is possible to suppress spreading of the resin that fills the gap between the lead wire and the wiring hole more than necessary. In addition, when resin for molding is filled in the inside of the motor case, leakage of the resin from the wiring hole can be prevented.

In the present invention, it is preferable to provide a fixing member for fixing the pressing member or the lead wire holder to the motor case, and a frame ground terminal electrically connected to the motor case through the fixing member. In this case, it is not necessary to use a dedicated component for the installation of the frame ground terminal and the electrical connection with the motor case. Therefore, the number of parts can be reduced.

According to the present invention, the lead wire holder is fixed to the motor case, and the pressing member fixed to the lead wire holder has the lead wire pressing portion opposed to the wiring hole formed in the lead wire holder. Thereby, the lead wire drawn out from the wiring hole can be bent out in parallel with the surface on which the lead wire holder is provided. Further, the lead wire pressing portion can restrict the height of the lead wire bent out of the wiring hole and bent from the wiring hole. Therefore, the height of the root of the lead portion of the lead wire can be suppressed from varying. Further, by reducing the height of the lead wire, the length required for wiring of the lead wire can be shortened, and the amount of protrusion of the lead wire to the outside of the motor case can be suppressed.

1 is an external perspective view of a motor according to the present invention viewed from an output side.
2 is a cross-sectional view of the motor cut along a plane parallel to the axial direction.
3 is a cross-sectional view of the motor taken along a plane perpendicular to the axial direction.
4 is an exploded perspective view of the core holder and lead wire lead-out portion.
5 is an exploded perspective view of a core holder and a lead wire lead-out portion.
6 is a sectional view of the lead wire take-out portion.
7 is a perspective view of a feeder wire and a lead wire lead-out portion bound by a heat shrinkable tube.
8 is a perspective view showing a lead wire holder of a modified example.

Hereinafter, an embodiment of a motor to which the present invention is applied will be described with reference to the drawings. Fig. 1 is an external perspective view of the motor 1 according to the present invention viewed from the output side, and Fig. 2 is a cross-sectional view of the motor 1 taken along a plane parallel to the axial direction L. Fig. 3 is a sectional view of the motor 1 taken along a plane perpendicular to the axial direction L. As shown in Fig. In the present specification, the side where the output shaft 100 of the motor 1 protrudes from one side and the other side in the axial direction L of the motor 1 is referred to as the output side L1, and the side on which the output shaft 100 is projected The opposite side is referred to as a half output side L2. In addition, two directions perpendicular to the axial direction L are referred to as X direction and Y direction. The output shaft 100 of the motor 1 is provided at the end of the output side L1 of the motor side rotary shaft 31 extending in the axial direction L at the center of the motor 1. [

(Encoder)

The motor 1 of the present embodiment is a motor having an encoder in which an encoder 5 is detachably attached to an end of the half-output side L2 of the motor main body 2. 2, the encoder 5 includes an encoder-side rotary shaft 51 connected to an end of a half-output side L2 of the motor-side rotary shaft 31 (a small-diameter portion 34 described later) via a coupling 4, Output side L2 of the encoder side rotary shaft 51 and a magnet 53 which is disposed on the output side L2 of the encoder side rotary shaft 51 via a magnet holder 52 and a magnetoresistive element 54 such as an MR element opposed to the magnet 53 on the non- And an encoder cover 60 for accommodating the magnet 53 and the demagnetizing element 54. [ In the present embodiment, the coupling 4 is a strut coupling and has a structure capable of absorbing axial misalignment (eccentricity) between the motor side rotary shaft 31 and the encoder side rotary shaft 51.

The encoder cover 60 has a first cover 61 made of metal and a second cover 62 made of resin. The first cover 61 is fixed to the half-output side L2 of the second cover 62. [ The magnet 53 and the demagnetizing element 54 are disposed inside the first cover 61. The encoder cover 60 is fixed to the motor main body 2 such that the second cover 62 made of resin comes into contact with the end face of the half-output side L2 of the motor body 2 (the flange 19 of the second bearing holder 13, (2). The encoder cover 60 is provided with a fixing hole (not shown) passing through the first cover 61 and the second cover 62. A fixing screw (not shown) passed through the fixing hole is inserted into the motor main body 2 So that the encoder 5 is detachably attached to the motor main body 2. The encoder 5 has a signal line 64 (see FIG. 1) for transmitting an angle detection signal based on the output of the demagnetizing element 54. The signal line 64 is drawn out to the outside from a signal line blow-out port (not shown) provided in the first cover 61.

A third bearing holder (63) is fixed to the center of the second cover (62). The encoder side rotary shaft 51 is rotatably supported at two positions spaced apart in the axial direction L by two bearings 65 and 66 held on the inner peripheral side of the third bearing holder 63. [ A substrate holder 55 is fixed to the half-output side L2 of the third bearing holder 63. [ On the inner circumferential side of the substrate holder 55, a magnet holder 52 and a magnet 53 fixed to the tip of the encoder side rotary shaft 51 are disposed. The sensor substrate 56 on which the demagnetizing element 54 is mounted is fixed to the end of the half-output side L2 of the substrate holder 55. The sensor substrate 56 is covered with the half-output side L2 and the outer peripheral side by a cup-shaped sensor cover 57 fixed to the inside of the first cover 61. [

(Motor body)

The motor main body 2 includes a motor housing 10, a conventional stator 20 disposed inside the motor housing 10, and a rotor 30 rotatably disposed inside the stator 20 . 2 and 3, the rotor 30 includes a motor side rotating shaft 31, a rotor core 32 fixed to the outer peripheral side of the motor side rotating shaft 31, And a magnet 33 fixed to the magnet. In this embodiment, the motor-side rotary shaft 31 includes a magnetic material, and the encoder-side rotary shaft 51 includes a non-magnetic material. The encoder side rotary shaft 51 may be a magnetic material.

The motor housing 10 includes a conventional core holder 11 facing the opening in the axial direction L of the motor 1, a first bearing holder 12 fixed to an end of the output side L1 of the core holder 11, And a second bearing holder 13 fixed to an end of the half-output side L2 of the core holder 11. [ A first bearing (14) is held on the inner peripheral side of the first bearing holder (12). The second bearing 15 is held on the inner peripheral side of the second bearing holder 13. The first bearing 14 and the second bearing 15 include ball bearings. The motor side rotary shaft 31 is rotatably supported by the first bearing 14 and the second bearing 15. The output shaft 100 is formed at the end of the motor side rotary shaft 31 projecting from the first bearing holder 12 to the output side L1. As shown in Fig. 1, the first bearing holder 12 and the second bearing holder 13 are screwed to the core holder 11 by a fixing screw 16.

2, a concave portion 18 is formed at the center of the second bearing holder 13 so as to be concaved at the output side L1, and a flange 19 is formed at the outer circumferential side of the concave portion 18. The second bearing 15 is disposed in the recess 18 and the inner ring of the second bearing 15 is fixed to the small diameter portion 34 formed on the half output side L2 of the motor side rotary shaft 31. [ An annular convex portion 191 to be fitted to the end of the half-output side L2 of the core holder 11 is formed on the outer periphery of the flange 19. Further, the second cover 62 of the encoder cover 60 abuts against the flange 19 from the half-output side L2. The encoder cover (60) is screwed onto the flange (19). The flange 19 is formed with a pin 192 protruding to the half-output side L2 on the outer circumferential side of the encoder cover 60. [ The pins 192 are disposed radially about the encoder cover 60.

2 and 3, the stator 20 includes an annular stator core 21 having a plurality of salient poles at equally spaced intervals, And a drive coil 23 wound around the rotor 22 (see Fig. 2). The insulating member 22 includes a resin material such as PET (polyethylene terephthalate). The stator core 21 includes a laminated core in which a plurality of silicon steel plates are laminated. As shown in Fig. 3, the outer periphery of the core holder 11 has an angular cylinder shape, and the inner periphery is cylindrical. The stator core 21 includes a ring portion 211 which is in contact with the core holder 11 and a plurality of salient poles 212 protruding inward in the radial direction from the ring portion 211. On the outer circumferential surface of the ring portion 211, a groove-shaped concave portion 213 extending from one end to the other end in the axial direction L of the stator core 21 is formed. The groove-like concave portion 213 is formed at the same angular position as the center of the circumferential direction of the salient pole 212. The stator core 21 includes a plurality of divided cores 21A in which ring portions 211 are divided in the circumferential direction for each of the single salient poles 212. [

The drive coil 23 is connected to the lead wire 24 via a crimp terminal. The three-phase currents of the U phase, the V phase, and the W phase are supplied to the drive coil 23 via the lead wire 24. That is, the lead wire 24 is a feeder wire. The three lead wires 24 connected to the drive coil 23 are drawn out to the outside through the lead wire takeout portion 40 provided in the core holder 11. [

The stator core 21 and the drive coil 23 fixed to the inside of the core holder 11 are covered by the mold resin portion 26 (see Fig. 2). The mold resin portion 26 is formed as follows. The stator core 21 is fixed to the inside of the core holder 11 by shrink fitting or press fitting so that the lead wire 24 is connected to the drive coil 23 and the lead wire 24 is connected to the side Out portion 40 formed in the stator core 110, and then the mold is disposed inside the stator core 21. [0050] When the mold resin is injected between the mold and the core holder 11, the resin flows through the groove-like concave portion 213 formed between the adjacent salient poles 212 in the circumferential direction and the outer circumferential surface of the ring portion 211, And is filled between the mold and the core holder 11. When the filled resin solidifies, a mold resin portion 26 covering the stator core 21 and the drive coil 23 is formed.

In this embodiment, for example, a BMC (Bulk Molding Compound) is used as a resin for a mold. BMC is a resin material mixed with an unsaturated polyester resin, a filler such as calcium carbonate, glass fiber, or the like. The mold resin part 26 transfers the heat generated in the drive coil 23 to the core holder 11. Therefore, the heat generated in the drive coil 23 can be efficiently exhausted. Further, the drive coil 23 and the lead wire 24 are completely covered with the mold resin part 26 and are insulated.

(Core holder)

The core holder 11 is made of metal. In this embodiment, the core holder 11 is made of aluminum and is formed by extrusion molding in which the core holder 11 is extruded in the axial direction L from the extrusion die. The core holder 11 has an angular cylindrical shape as a whole when viewed from the outside. The outer circumferential surface of the core holder 11 has a side surface 110 facing the + X direction, a side surface 120 facing the -X direction, a side surface 130 facing the + Y direction, a side surface 130 facing the- ). On the outer circumferential surface of the core holder 11, a concave portion 150 recessed toward the inner circumferential side is formed between the adjacent side surfaces in the circumferential direction. The sides 110, 120, 130, and 140 extend from one end to the other end in the axial direction L of the core holder 11 with a substantially constant width.

1 and 3, in the core holder 11, a first flat portion 111 is formed at the center in the width direction (Y direction) of the side surface 110 facing the + X direction. In the side surface 110, a depression 112 is formed on both sides of the first flat portion 111 in the width direction. Further, a thick portion 113 is formed on the outer side in the width direction (opposite to the first flat portion 111) of the depressed portion 112. The side faces 120, 130, and 140 have the same cross-sectional shape as a plane perpendicular to the axial direction L. A second flat portion 121 is formed at the center in the width direction (Y direction) of the side surfaces 120, 130 and 140 and a heat dissipating portion 122 is formed at both sides in the width direction of the second flat portion 121 have. A thick portion 123 is formed on the outer side in the width direction of the heat dissipating portion 122 (the side opposite to the second flat portion 121). The heat dissipating unit 122 includes a fin 160 and a groove 170 extending in the axial direction L. [ The pin 160 and the groove 170 are alternately arranged.

(Lead wire lead-out part)

As shown in Fig. 1, the lead wire takeout portion 40 is disposed at a position near the half output side L2 of the side face 110 facing the + X direction. 2, the lead wire take-out portion 40 includes a penetrating portion 41 penetrating through the first flat portion 111 of the side surface 110, a lead wire holder 41 fixed to a position covering the penetrating portion 41, (42), and a pressing member (43) fixed to the lead wire holder (42). As shown in Fig. 3, the lead wire holder 42 is approximately the same width as the first flat portion 111. As shown in Fig. 1, a frame ground terminal 44 is provided in the lead wire take-out portion 40, and a ground wire 25 is connected to the frame ground terminal 44. [

In the core holder 11, the mold resin portion 26 is disposed on the inner circumferential side of the position where the lead wire holder 42 is provided. The molded resin portion 26 may be enlarged to at least the inner circumferential side of the penetrating portion 41 in the range where the lead wire holder 42 is provided. In this embodiment, the mold resin portion 26 is expanded to the vicinity of the opening of the core holder 11. [ The lead wire 24 is completely covered with the mold resin portion 26 on the inside of the penetration portion 41 because the mold resin portion 26 is expanded to the inside of the penetration portion 41. [ The mold resin portion 26 is formed by forming the lead wire lead-out portion 40 by covering the penetration portion 41 with the lead wire holder 42 provided in the core holder 11 and by connecting the lead wire lead- The resin for the mold is filled in a state in which one lead wire 24 is led out from the lead wire take-out portion 40. [

Figs. 4 and 5 are exploded perspective views of the core holder and the lead wire take-out portion 40. Fig. Fig. 4 shows the state viewed from the + X direction side, and Fig. 5 shows the state seen from the -X direction side. 6 is a cross-sectional view of the lead wire take-out portion 40 (enlarged cross-sectional view of the area A in Fig. 2). The lead wire lead-out portion 40 is provided on the first flat portion 111 of the side surface 110 of the core holder 11, as shown in Figs. 2 and 3. 4 and 5, the penetrating portion 41 penetrating the core holder 11 is formed at the center in the width direction (Y direction) of the first flat portion 111. As shown in Fig. The penetrating portion 41 is substantially rectangular and its long side direction coincides with a direction (Y direction) orthogonal to the axial direction L of the core holder 11.

As shown in Figs. 4 and 5, the lead wire holder 42 has a substantially rectangular plate-shaped seat portion 423. 5, convex portions 421 protruding toward the core holder 11 (i.e., in the -X direction) are integrally formed in the seat portion 423. [ 6, the lead wire holder 42 is formed so that the seat portion 423 abuts on the first flat portion 111 and the convex portion 421 is engaged with the penetrating portion 41 so that the core holder 11 . A fixing hole is formed in a corner portion of the seat portion 423. The lead wire holder 42 is fixed to the first flat portion 111 by a fixing member 46 such as a screw provided in the fixing hole. 5 and 6, the seat portion 423 has an abutment surface abutting on the first flat portion 111, and on the abutment surface, an annular seal 421 surrounding the convex portion 421, Grooves 424 are formed. A sealing material 45 such as an O-ring is disposed in the seal groove 424.

A wiring hole 422 is formed in the lead wire holder 42. The wiring hole 422 penetrates the convex portion 421 and the seat portion 423 in the radial direction (X direction) of the core holder 11 in the state that the lead wire holder 42 is provided in the core holder 11 . 5, a peripheral wall 425 surrounding a region where the wiring hole 422 is opened is formed in the tip end face of the convex portion 421. As shown in Fig. 6, lead wires pass through the wiring hole 422 one by one. The gap between the wiring hole 422 and the lead wire 24 is blocked by the adhesive 426. [ Therefore, when the resin for the mold is filled in the core holder 11, it is possible to prevent the resin from leaking from the gap between the wiring hole 422 and the lead wire 24. The peripheral wall 425 formed on the distal end face of the convex portion 421 restricts the adhesive 426 from expanding from the distal end face of the convex portion 421. [

5, the convex portion 421 and the penetrating portion 41 are elongated in the width direction (Y direction) of the side surface 110. As shown in Fig. The convex portion 421 is located approximately at the center of the long side direction (Y direction) of the seat portion 423. Further, the convex portion 421 is formed at a position near the half output side L2 of the seat portion 423. In the convex portion 421, a plurality of wiring holes 422 are formed. The plurality of wiring holes 422 are arranged in a line in the longitudinal direction of the convex portion 421. When the convex portion 421 is fitted to the penetrating portion 41, the wiring holes 422 are arranged in a line in a direction (Y direction) orthogonal to the axial direction L. The number of the wiring holes 422 is the same as the number of the lead wires 24 (3 in this embodiment). The number of the wiring holes 422 is not limited to three, and the number of the wiring holes 422 can be appropriately set in accordance with the number of lead wires taken out from the core holder 11. [

4, the lead wire holder 42 has a pressing member fixing portion 427 protruding from the seat portion 423 on the side opposite to the core holder 11 (in the + X direction). The pressing member fixing portion 427 is formed integrally with the seat portion 423. On the upper surface of the sheet portion 423, a region in which a plurality of wiring holes 422 are opened is formed, and a pressing member fixing portion 427 on the wall surrounding the region is formed. The pressing member fixing portion 427 includes a wall portion 427a positioned at the half output side L2 of the wiring hole 422 and wall portions 427b and 427c extending from both ends of the wall portion 427a toward the output side L1 in the axial direction L Respectively. The pressing member fixing portion 427 has a step portion 428 connecting ends of the output side L1 of the wall portions 427b and 427c. The projecting height from the seat portion 423 is lower than the wall portions 427a, 427b, and 427c. That is, the pressing member fixing portion 427 is formed with the cutout portion 429 surrounded by the step portion 428 and the wall portions 427b and 427c.

The step portion 428 is located on the output side L1 of the wiring hole 422 and has a chamfer portion 428a formed in the corner portion located on the side of the wiring hole 422. [ Therefore, when the lead wire 24 drawn out from the wiring hole 422 is wired to the output side L1, the lead wire 24 is drawn over the stepped portion 428 from the side of the chamfered portion 428a.

As shown in Figs. 4 and 5, the pressing member 43 is substantially rectangular, and its outer shape is substantially the same as the outer shape of the pressing member fixing portion 427. As shown in Fig. The pressing member 43 has a fixing portion 431 which abuts against the pressing member fixing portion 427 and a lead wire pressing portion 432 which is opposite to the wiring hole 422 and the step portion 428. The fixing portion 431 is provided on the rim of the half-output side L2 of the pressing member 43 and on the rim of the three sides of both side edges in the Y direction. A fixing hole is formed in the corner of the pressing member 43. The pressing member 43 is fixed to the pressing member fixing portion 427 at four places by a fixing member 47 such as a screw which passes through the fixing hole. One of the four fixing members 47 fixes the frame grounding terminal 44 together with the pressing member 43 to the lead wire holder 42. The fixing member 47 is made of metal. The fixing member 47 is passed through the fixing hole formed in the lead wire holder 42 and the tip end of the fixing member 47 is fixed to the fixing hole formed in the core holder 11, , And the frame ground terminal 44 is electrically connected to the core holder 11. Therefore, the ground of the frame can be drawn out to the outside of the motor by the grounding line 25 provided on the frame grounding terminal 44.

The lead wire pressing portion 432 has a shape in which the central portion in the width direction (Y direction) is bulged in the + X direction. The lead wire pressing portion 432 has a central portion 432a located at the center in the Y direction and an inclined portion 432b inclined toward the fixing portion 431 at both sides in the Y direction and at the half output side L2 of the central portion 432a do. And the Y direction is the direction in which the wiring holes 422 are arranged. That is, the lead wire pressing portion 432 has a shape in which the center of the arrangement direction of the plurality of wiring holes 422 is swollen in the direction (+ X direction) away from the wiring hole 422.

A lead wire 24 drawn in the + X direction from the wiring hole 422 is bent toward the output side L1 between the lead wire pressing portion 432 and the surface of the sheet portion 423 in which the wiring hole 422 is opened A possible space is formed. A stepped portion 428 is disposed on the output side L1 of the wiring hole 422 and a gap G larger than the outer diameter of the lead wire 24 is formed between the stepped portion 428 and the lead wire pressing portion 432. [ The lead wire 24 is drawn out in the + X direction from the wiring hole 422 and bent to the output side L1, and the position in the + X direction is regulated by the lead wire pressing portion 432 and guided in the axial direction L, And is drawn out. And is wired to the output side L1 along the side surface 110 of the core holder 11. [

The lead wire pressing portion 432 regulates the position (height) in the + X direction of the lead wire 24 when the lead wire 24 is taken out to the outside. Therefore, the position (height) in the + X direction of the plurality of lead wires 24 can be aligned and the length required for wiring of the lead wire 24 can be shortened. Since the inclined portions 432b are formed on both sides of the lead wire pressing portion 432 in the Y direction, the plurality of lead wires 24 are guided to the center of the lead wire pressing portion 432. [ Therefore, variations in the arrangement direction of the plurality of lead wires 24 are suppressed, and they are gathered together and drawn out.

(Main effect of this embodiment)

As described above, the motor 1 of the present embodiment has the penetrating portion 41 formed in the normal core holder 11 (cylindrical portion) and the lead wire holder 42 provided on the penetrating portion 41, Out portion 40 is formed. A pressing member 43 is fixed to the lead wire holder 42 and the pressing member 43 has a lead wire pressing portion 432 opposed to the wiring hole 422 formed in the lead wire holder 42. [ The lead wire 24 can be guided by the lead wire pressing portion 432 when the lead wire 24 drawn out from the wiring hole 422 is bent and drawn out in the axial direction L of the core holder 11. [ The lead wire pressing portion 432 can regulate the height (the height from the wiring hole 422) of the lead wire 24 bent in the axial direction L. [ Therefore, the height of the lead wire 24 can be suppressed from varying. Further, by reducing the height of the lead wire 24, the required length of the lead wire 24 can be shortened. The amount of protrusion of the lead wire 24 to the outer circumferential side of the core holder 11 can be suppressed and the projecting height of the lead wire lead-out portion 40 from the core holder 11 can be suppressed. Thereby, it is not necessary to form a relief portion on the apparatus side so as to avoid interference with the lead wire takeout portion 40 when the motor 1 is incorporated in various apparatuses. That is, it is possible to suppress the size of the arrangement space of the motor 1 to be increased. In addition, when the plurality of lead wires 24 are drawn out, the height can be aligned, so that the lengths of the plurality of lead wires 24 can be aligned.

In the present embodiment, a plurality of wiring holes 422 are formed in the lead wire holder 42 and a plurality of wiring holes 422 are arranged in a line in a direction (Y direction) orthogonal to the axial direction L of the core holder 11 have. Therefore, when the plurality of lead wires 24 are wired in the axial direction L, the length of the lead wires 24 can be aligned. Further, when the wiring holes 422 are arranged in the axial direction L, the length of a part of the lead wires 24 becomes long. In this embodiment, however, the length of all the lead wires 24 can be shortened. Therefore, the required length of the lead wire 24 can be shortened as compared with the case where the wiring holes 422 are arranged in the axial direction L.

In the present embodiment, the lead wire holder 42 has a plate-shaped seat portion 423 and a pressing member fixing portion 427 formed integrally with the seat portion 423. The pressing member fixing portion 427 has wall portions 427a, 427b and 427c surrounding the outer periphery of the wiring hole 422 formed in the seat portion 423 and wall portions 427a, 427b and 427c in a part of the peripheral portion, The lower step portion 428 is formed. Therefore, the lead wire 24 can be taken out from the gap G between the stepped portion 428 and the lead wire pressing portion 432. Since the positions of the lead wires 24 are regulated by the wall portions 427b and 427c, the plurality of lead wires 24 can be gathered together and taken out.

A mold resin portion 26 covering the stator 20 and the drive coil 23 is provided in the inner periphery of the core holder 11 and the convex portion 421 of the lead wire holder 42 is fixed to the core holder 11 The through-hole 41 of the connector body 41 is fitted. The resin for forming the mold resin part 26 can be prevented from adhering to the lead wire holder 42 and the penetrating part 41 because the resin part 41 of the core holder 11 can be closed except for the wiring hole 422. [ There is less risk of leakage from the gap.

The molded resin portion 26 is disposed on the inner peripheral side of the position where the lead wire holder 42 is provided so that the lead wire 24 that is wired from the stator 20 to the lead wire holder 42 is made of resin Respectively. Therefore, the heat dissipation effect can be enhanced against the heat generated from the stator covered by the resin for the mold.

The lead wire holder 42 of this embodiment is provided with a peripheral wall 425 surrounding a region where the wiring hole 422 is opened in the front end face of the convex portion 421 where the wiring hole 422 is opened. Therefore, when the gap between the lead wire 24 passing through the wiring hole 422 and the wiring hole 422 is filled with the adhesive 426, the adhesive 426 can be prevented from being unnecessarily enlarged. It is also possible to prevent the resin from leaking from the wiring hole 422 when the mold resin is filled in the core holder 11. [

In this embodiment, the fixing member 47 for fixing the pressing member 43 to the lead wire holder 42 is made of metal, and its tip end contacts the core holder 11. [ Then, the fixing member 47 fixes the frame ground terminal 44 together with the pressing member 43. Therefore, since the frame ground terminal 44 and the core holder 11 are electrically connected by the fixing member 47, a special component is provided for the installation of the frame ground terminal 44 and the electrical connection of the core holder 11 You do not need to use it. Therefore, the number of parts can be reduced.

(Modified example)

(1) Fig. 7 is a perspective view of a lead wire 24 and a lead wire take-out portion 40 bound by a heat shrink tube 48. Fig. It is preferable to bind the lead wires 24 to the heat shrink tube 48 when a plurality of lead wires 24 are taken out from the lead wire take- In this case, it is preferable that the heat shrink tube 48 is disposed so as to span the rim of the lead wire pressing portion 432. In other words, it is preferable to dispose the heat shrink tube 48 such that only a part of the heat shrink tube 48 is covered by the lead wire pressing part 432 and the other part is located outside the lead wire pressing part 432. [ In this way, the plurality of lead wires 24 can be gathered together by the heat shrink tube 48. In addition, since the portion of the lead wire pressing portion 432 that is in contact with the rim is protected by the heat shrink tube 48, it is possible to prevent the lead wire 24 from being damaged by the contact with the edge of the member.

(2) Fig. 8 (a) is a perspective view showing the lead wire holder 42A of the modified example, and Fig. 8 (b) is a perspective view showing the modification 42B. In the lead wire holder 42A shown in Fig. 8A, the shape of the pressing member fixing portion 427 is different from the above-mentioned shape. Concretely, wall portions 427d and 427e having the same height as the wall portions 427b and 427c are formed at both ends of the step portion 428, respectively. In this way, the width of the gap G through which the lead wire 24 passes can be narrowed by the wall portions 427d and 427e. Therefore, the lead wires 24 can be prevented from fluctuating in the arranging direction (Y direction), so that the lead wires 24 can be gathered together and taken out. The lead wire holder 42B shown in Fig. 8B is obtained by omitting the stepped portion 428. Fig. By omitting the step portion 428, the height of the lead wire 24 can be further suppressed. At this time, by making the center portion of the pressing member 43 in the width direction (Y direction) bulge in the -X direction, the gap G can be narrowed, so that the height of the lead wire 24 can be more reliably suppressed.

(Other Modifications)

Although the above embodiment is for pulling out the feed lead wire 24 from the lead wire take-out portion 40 to the drive coil 23, the use of the lead wire pulled out from the lead wire takeout portion 40 is not limited to the feeder wire. Although the lead wire 24 drawn in the radial direction of the core holder 11 from the wiring hole 422 passing through the lead wire holder 42 is bent to the output side L1 and is wired in the axial direction L, It may be bent to the output side L2 and wired in the axial direction L. In this case, the lead wire holder 42 may be provided so that the gap G faces the half-output side L2. Alternatively, it is not necessary to change the direction of the lead wire holder 42 along the direction in which the lead wire 24 is drawn out, if a gap G is formed on both the output side L1 and the half output side L2.

Although the lead wire holder 42 of the above-described form has the substantially rectangular plate-shaped seat portion 423, the planar shape of the seat portion 423 is not limited to the rectangular shape. Further, the plane shape of the pressing member fixing portion 427 is not limited to a rectangular shape.

The frame ground terminal 44 of this type is electrically connected to the core holder 11 via a metal fixing member 47 for fixing the pressing member 43. The connection method of the frame ground terminal 44 is The present invention is not limited to the same configuration. For example, one of the four metal fixing members 46 for screwing the lead wire holder 42 to the core holder 11 is connected to the frame ground terminal 44 together with the lead wire holder 42 in the core holder 11 As shown in Fig. In this way, the frame ground terminal 44 can be electrically connected to the core holder 11 via the metal fixing member 46. [

1: motor
2: motor body
4: Coupling
5: Encoder
10: Motor housing
11: Core holder
12: first bearing holder
13: second bearing holder
14: First bearing
15: Second bearing
16: Set screw
18:
19: Flange
20:
21: stator core
21A: split core
22: Insulation member
23: drive coil
24: Lead wire
25: Ground wire
26: Mold resin part
30: Rotor
31: Motor side rotary shaft
32: rotor core
33: Magnet
34: Small neck
40: Electrical entry of the lead wire
41:
42: Lead wire holder
43: pressing member
44: Frame ground terminal
45: Seal material
46: Fixing member
47: Fixing member
48: Heat shrinkable tube
51: Encoder side rotary shaft
52: Magnet holder
53: magnet
54: Potentiometer element
55: substrate holder
56: Sensor substrate
57: Sensor cover
60: Encoder cover
61: first cover
62: second cover
63: Third bearing holder
64: Signal line
65, 66: Bearings
100: Output shaft
110: side
111: first flat portion
112:
113: thickening
120, 130, 140: side
121:
122:
123: thickening
150:
160: pin
170: Groove
191: annular convex portion
192: pin
211:
212:
213: groove recess
421:
422: wiring hole
423:
424: Seal groove
425: surrounding wall
426: Adhesive
427:
427a, 427b, 427c:
427d, 427e:
428:
428a:
429:
431:
432: Lead wire pressing portion
432b:
432a:
G: Clearance
L: Axial direction
L1: Output side
L2: half output side

Claims (13)

A rotor and a stator,
A motor case accommodating the rotor and the stator,
A lead wire holder provided in the motor case,
And a pressing member provided on the lead wire holder,
Wherein the lead wire holder includes a seat portion abutting on the motor case and a pressing member fixing portion integrally formed with the seat portion,
Wherein the pressing member has a lead wire pressing portion that faces the wiring hole passing through the lead wire holder. The motorcycle according to claim 1, wherein the motor case has a cylindrical portion surrounding the outer periphery of the rotor and the stator,
Wherein the lead wire holder is provided in the cylindrical portion,
Wherein a plurality of the wiring holes are arranged in a direction orthogonal to the axial direction of the tubular portion. 3. The semiconductor device according to claim 2, further comprising: a heat shrinkable tube which binds a plurality of lead wires passing through the plurality of wiring holes,
And a part of the heat shrinkable tube is covered by the pressing member, and a part other than the part is located outside the pressing member. The seat according to claim 3, wherein the seat portion is plate-
Wherein the pressing member fixing portion is a wall portion protruding from the seat portion and surrounding an outer periphery of the wiring hole,
A step portion lower than a portion having a projection height different from the seat portion is formed in a part of the wall portion in the circumferential direction,
And a gap through which the lead wire passes is formed between the stepped portion and the lead wire pressing portion. The motorcycle according to claim 4, wherein the lead wire holder has a convex portion fitted in a through portion formed in the motor case,
Wherein a molded resin portion for covering the stator is provided on an inner periphery of the motor case. The motor according to claim 5, wherein the molded resin portion is disposed on an inner circumferential side of a position where the lead wire holder is installed. 7. The semiconductor device according to claim 5 or 6, wherein the wiring hole is opened at a front end face of the convex portion, and a peripheral wall surrounding an area where the wiring hole is opened is formed in the front end face,
And an adhesive disposed in a gap between the wiring hole and the lead wire passing through the wiring hole. The motorcycle according to any one of claims 1 to 6, further comprising: a fixing member for fixing the pressing member or the lead wire holder to the motor case;
And a frame ground terminal electrically connected to the motor case via the fixing member. The seat according to claim 1, wherein the seat portion is plate-
Wherein the pressing member fixing portion is a wall portion protruding from the seat portion and surrounding an outer periphery of the wiring hole,
A step portion lower than a portion having a projection height different from the seat portion is formed in a part of the wall portion in the circumferential direction,
And a gap through which the lead wire passes is formed between the stepped portion and the lead wire pressing portion. The motorcycle according to claim 9, wherein the lead wire holder has a convex portion fitted in a through portion formed in the motor case,
Wherein a molded resin portion for covering the stator is provided on an inner periphery of the motor case. The motor according to claim 10, wherein the molded resin portion is disposed on an inner circumferential side of a position where the lead wire holder is installed. 12. The semiconductor device according to claim 10 or 11, wherein the wiring hole is opened at the end face of the convex portion, and a peripheral wall surrounding the region where the wiring hole is opened is formed in the end face,
And an adhesive disposed in a gap between the wiring hole and the lead wire passing through the wiring hole. The motorcycle according to any one of claims 9 to 11, further comprising: a fixing member for fixing the pressing member or the lead wire holder to the motor case;
And a frame ground terminal electrically connected to the motor case via the fixing member.

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