JP5185590B2 - motor - Google Patents

Description

  The present invention relates to a motor, and more particularly to a motor provided with a terminal pin for energizing a drive coil.

  In general, a small motor 100 (stepping motor) as shown in FIG. 9 uses a drive coil 102 that generates a magnetic field for rotating the rotor 101. In order to energize the drive coil 102, the motor 100 is provided with a plurality of terminal pins 104 with which the winding terminal 102 a of the drive coil 102 is entangled. In addition, as a prior art document describing such a motor, the following Patent Document 1 can be cited.

  These terminal pins 104 are provided on a terminal block 106 formed on the outer peripheral side of the motor 100. As shown in the figure, the terminal block 106 is provided so as to protrude from an opening 108 a formed in the motor case 108, and the winding terminal 102 a of the drive coil 102 is drawn out from the opening 108 a and is connected to the terminal pin 104. Will be entangled.

JP 2006-280035 A

  In the motor 100 having such a configuration, when the winding terminal 102a of the driving coil 102 is pulled out from the opening 108a, the winding terminal 102 constituting the driving coil 102 comes into contact with the peripheral edge (edge) of the opening 108a, There was a problem of disconnection and damage.

  In view of the above problems, the problem to be solved by the present invention is to provide a motor in which disconnection / damage of the winding due to contact with the motor case when the winding terminal of the drive coil is pulled out is prevented. It is in.

In order to solve the above problems, a motor according to the present invention includes a motor case, a stator core disposed in the motor case, a drive coil wound around the stator core, and a terminal pin for energizing the drive coil. the is disposed on the outer peripheral side of the stator core, in the motor and a terminal block the terminal pin is provided, wherein the motor case opening for protruding the outer circumference of the terminal block is formed, the openings A disconnection preventing member having an engaging portion that enters the inside of the opening and covers a peripheral edge of the opening, and a lower end portion that contacts the outer peripheral surface of the motor case, and the terminal block is inserted into the disconnection preventing member A through-hole is formed, and a winding terminal of the drive coil is drawn out from the stator core through a gap between an inner surface of the terminal block through-hole and an outer surface of the terminal block. It is an Abstract that are tied to the child pin.

  According to the present invention configured as described above, since the periphery (edge portion) of the opening formed in the motor case is covered with the disconnection preventing member, the winding terminal of the drive coil drawn out from the opening is opened. There is no contact with the periphery (motor case) of the part. Accordingly, disconnection / damage of the winding terminal during motor manufacture can be prevented, leading to a significant reduction in the defect rate and high quality of the motor in the motor assembly process.

In addition, the winding terminal of the drive coil can be easily pulled out from the gap between the disconnection prevention member and the terminal block, and the winding terminal may be sandwiched between the disconnection prevention member and the terminal block, resulting in disconnection or damage. Is prevented.

Further, it is possible to prevent the corner of the drive coil of the terminal block through opening be formed in R shape, the winding terminal will be broken or damaged by contact with the disconnection preventing member .

  Moreover, if the said terminal pin protrudes from the said terminal block through-hole, and is bent, the height of the terminal pin on a terminal block can be made low. As a result, it is possible to reduce the size of the motor while securing a sufficient length of the terminal pin for binding the winding terminal.

  At this time, a pedestal portion only needs to be formed around the terminal block through-hole, and a power supply substrate is disposed on the pedestal portion, and an insertion hole for the terminal pin is formed in the power supply substrate. If it is, it is more preferable. With this configuration, when attaching the power supply board to the terminal pins, the pedestal portion of the disconnection prevention member functions as a pedestal for the power supply board, so that the connection work by soldering the winding terminal and the power supply board is easy. become. In addition, when the terminal pin is bent, the winding terminal entangled with the terminal pin is protected by the disconnection prevention member even if it is loosened. Absent.

  According to the motor of the present invention, since the peripheral edge (edge portion) of the motor case is covered with the disconnection preventing member, the winding of the drive coil drawn out from the opening does not come into contact with the motor case, and the motor is manufactured. It is possible to prevent breakage / damage of the winding at the time.

  Hereinafter, embodiments of a motor according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of a motor 1 according to the present embodiment (first embodiment), and FIG. 2 is a partial cross-sectional view of the motor 1.

  The motor 1 according to this embodiment includes a rotor 12 and a stator 20.

  The rotor 12 includes a rotating shaft 14 and a permanent magnet 16. Specifically, the permanent magnet 16 is fixed to the outer peripheral surface of the rotating shaft 14 on the opposite side to the output side, and the N pole and the S pole are alternately magnetized in the circumferential direction. The rotary shaft 14 is rotatably supported by a first radial bearing 181 and a second radial bearing 182.

  The stator 20 is configured in a two-phase structure by a first stator set 201 and a second stator set 202 that are arranged in an axial direction so as to be opposed to the permanent magnet 16 on the outer peripheral side.

  The first and second stator sets 201 and 202 include inner stator cores 241 and 242, coil bobbins 281 and 282 around which drive coils 261 and 262 are wound, and coil bobbins 281 and 282 between the inner stator cores 241 and 242, respectively. The outer stator cores 251 and 252 sandwiched between the two.

  A plurality of pole teeth 29 formed on the inner stator cores 241 and 242 and the outer stator cores 251 and 252 are alternately formed on the inner peripheral side of the coil bobbins 281 and 282. Therefore, in the present embodiment, the annular drive coil 261 is disposed on the outer periphery of each pole tooth 29 in the inner stator core 241 and the outer stator core 251 of the first stator set 221 via the coil bobbin 281, and similarly An annular drive coil 262 is disposed on the outer periphery of each pole tooth 29 in the inner stator core 242 and the outer stator core 252 of the two-stator set 222 via a coil bobbin 282. An insulating film is formed on the entire surface of the drive coils 261 and 262.

  Further, the outer peripheral edges of the outer stator cores 251 and 252 are formed upright so as to be bent and cover the outer periphery of the drive coils 261 and 262, and each function as a motor case. Hereinafter, the bent portions from the outer peripheral edges of the outer stator cores 251 and 252 are referred to as a first motor case 301 and a second motor case 302, respectively. The first motor case 301 and the second motor case 302 are formed in a cylindrical shape by drawing. Further, on the side wall surfaces of the first motor case 301 and the second motor case 302, an opening 32 cut out to a predetermined size (hereinafter referred to as a notched portion (edge) to form the opening 32). ) Is referred to as a peripheral edge 32a. Further, the first motor case 301 and the second motor case 302 are respectively formed with two openings 331 and 332 facing each other through which the drive coils 261 and 262 are exposed.

  The opening 32 and the openings 331 and 332 may be formed by punching after forming the metal plate into a cylinder, or may be formed by punching before forming the metal plate into the cylinder. Also good.

  A mounting plate 34 that is used when the motor 1 is mounted on a device is fixed to the output side end face of the outer stator core 251. The above-described first radial bearing 181 that supports the rotary shaft 14 on the output side is fixed to the mounting plate 34. As the first radial bearing 181, a sintered oil-impregnated bearing can be suitably applied.

  On the other hand, a side plate 36 is fixed to the opposite end face of the outer stator core 252. The above-described second radial bearing 182 that supports the rotary shaft 14 on the side opposite to the output side is fixed to the side plate 36. As the second radial bearing 182, a resin bearing can be suitably applied.

  Terminal pins 381a and 381b with which winding terminals 261a and 261b drawn from the drive coil 261 are wound and winding terminals 262a and 262b drawn from the drive coil 262 are wound around the outer peripheral edges of the inner stator cores 241 and 242. A terminal block 38 provided with terminal pins 382a and 382b to be pulled is fixed. The terminal block 38 is formed by resin molding integrally with the coil bobbins 281 and 282. The terminal pins 381a, 381b, 382a, 382b are integrally provided by insert molding when the terminal block 38 is resin-molded.

  The terminal block 38 configured in this manner protrudes from the opening 32 formed on the side wall surfaces of the first motor case 301 and the second motor case 302, and between the terminal block 38 and the opening 32, A groove (gap) having a predetermined size is formed. As shown in FIG. 1 and FIG. 2, the disconnection preventing member 5 is fitted and fixed in this groove (gap).

  FIG. 3 is an external perspective view in which the disconnection preventing member 5 is enlarged. The disconnection prevention member 5 is a member integrally formed of resin. In addition, the resin material which comprises a disconnection prevention member will not be specifically limited if it has insulation and heat resistance. As a suitable material, LCP (Liquid Crystal Polymer; liquid crystal polymer) etc. can be illustrated.

  In the center of the disconnection preventing member 5, a terminal block through-hole 5a cut out in a rectangular shape is formed. The width dimension of the terminal block through hole 5 a is formed to be slightly larger than the width dimension of the terminal block 38. Further, the disconnection preventing member 5 is formed with an engaging portion 5b, and the engaging portion 5b is press-fitted into a groove (gap) between the terminal block 38 and the opening 32, whereby the disconnection preventing member 5 is formed. 5 is fixed to the first motor case 301 and the second motor case 302. Specifically, since the entire width dimension of the engaging part 5b is slightly larger than the width dimension of the opening part 32, the first motor case 301 and the first motor case 301 and the first peripheral part 32a of the opening part 32 (of the peripheral edge 32a). 2 is engaged and fixed to a portion of the motor case 302 along the circumferential direction). That is, the disconnection preventing member 5 is fixed to the first motor case 301 and the second motor case 302 in a predetermined positional relationship by the engaging portion 5b.

  Further, since the lower end 5c is formed in an arc shape having the same curvature as the outer peripheral surfaces of the first motor case 301 and the second motor case 302, the lower end portion 5c is in contact with the outer peripheral surfaces of the first motor case 301 and the second motor case 302. It touches and is fixed without a gap. Here, since the length dimension of the engaging part 5b is formed smaller than the length dimension of the opening part 32, a part of opening part 32 will be covered with the lower end part 5c. Further, a pedestal portion 5d, the details of which will be described later, is formed around the terminal block through-hole 5a.

  Hereinafter, the operation of the disconnection preventing member 5 will be described. FIG. 4 is an enlarged cross-sectional view of the vicinity of the terminal block 38 of the motor 1 to which the disconnection preventing member 5 is attached.

  As described above, the width dimension of the terminal block through hole 5 a of the disconnection preventing member 5 is formed to be slightly larger than the width dimension of the terminal block 38. Therefore, as shown in FIG. 4, when the disconnection preventing member 5 is fixed, a gap S is formed between the terminal block through-hole 5 a and the side surface of the terminal block 38. Winding terminals 261a, 261b, 262a, 262b of the drive coils 261, 262 are drawn out from the gap S and are entangled with terminal pins 381a, 381b, 382a, 382b.

  Therefore, the winding terminals 261 a, 261 b, 262 a, 262 b drawn from the drive coils 261, 262 do not come into contact with the openings 32 formed in the first motor case 301 and the second motor case 302. In other words, the winding terminals 261a, 261b, 262a, and 262b of the drive coils 261 and 262 are not broken or damaged by the edge of the peripheral edge 32a of the opening 32, so the defective rate of the motor 1 is greatly reduced. Will lead to quality improvement. Moreover, the disconnection prevention member 5 also functions as an insulating member that prevents the winding terminals 261a, 261b, 262a, 262b and the first motor case 301 or the second motor case 302 from being short-circuited.

Further, the gap S formed between the side surface of the terminal block through- hole 5a of the disconnection preventing member 5 and the side surface of the terminal block 38 is sufficiently large to allow the winding terminals 261a, 261b, 262a, 262b to pass through. Is formed. Therefore, the winding terminals 261a, 261b, 262a, 262b are not sandwiched between the disconnection preventing member 5 and the terminal block 38, and are not disconnected or damaged.

  Further, as can be seen from FIG. 4, the corner 5 e on the drive coil 261, 262 side in the terminal block through-hole 5 a of the disconnection preventing member 5 is formed in an R shape. Thereby, disconnection and damage due to contact of the winding terminals 261a, 261b, 262a, and 262b with the disconnection preventing member 5 can be reliably prevented.

  In addition, the corner | angular part 5e by the side of the drive coil 261,262 in the terminal block through-hole 5a of the disconnection prevention member 5 does not necessarily need to be R shape as mentioned above. That is, the winding terminals 261a, 261b, 262a, and 262b need not be in a shape that is cut by contact with the disconnection preventing member 5, and applicable shapes include the material of the winding terminals 261a, 261b, 262a, and 262b, It depends on the thickness. Specifically, chamfering the corner 5e can be exemplified.

  Furthermore, as shown in FIG. 5, when the power supply board 7 for controlling the energization of the drive coils 261 and 262 is connected to the motor 1, the disconnection prevention member 5 also functions as a cradle for the power supply board 7. (The periphery of the terminal block through-hole 5a works as a pedestal portion 5d of the power supply substrate 7). Thus, when the power supply board 7 such as an FPC (flexible printed circuit board) is inserted into the terminal pins 381a, 381b, 382a, 382b, the power supply board 7 is placed on the terminal block 38 and the disconnection preventing member 5 in a stable state. Therefore, the connecting work by soldering the winding terminals 261a, 261b, 262a, 262b and the power supply substrate 7 becomes easy. Further, disconnection / damage of the winding terminals 261a, 261b, 262a, 262b due to contact with the power supply substrate 7 can be prevented.

  Moreover, since the opening part 32 is covered with the disconnection prevention member 5, mixing of dust etc. from the opening part 32 is prevented, and it leads to the quality and lifetime improvement of the motor 1.

  Next, the motor 2 according to the second embodiment of the present invention will be described. FIG. 6 is an external perspective view of the motor 2. FIG. 7 is an enlarged cross-sectional view of the vicinity of the terminal block 38 of the motor 2.

  The motor 2 is different from the motor 1 (terminal pins 381a, 381b, 382a, 382b) according to the first embodiment only in the shape of the terminal pins 481a, 481b, 482a, 482b. Therefore, members other than these are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 6 and 7, the terminal pins 481a, 481b, 482a, 482b are bent in a direction substantially parallel to the axial direction of the motor 2 where the winding terminals 261a, 261b, 262a, 262b are entangled. It has been. Of the terminal pins 481a, 481b, 482a, and 482b, the terminal pins 481a and 481b are bent in the output direction, and the terminal pins 482a and 482b are bent in the non-output direction.

  Thus, by bending the terminal pins 481a, 481b, 482a, and 482b on the terminal block 38, the length of the terminal pins 481a, 481b, 482a, and 482b protruding in the radial direction of the motor 2 on the terminal block 38 is small. Become. That is, the motor can be reduced in size while securing a sufficient winding length for winding the winding terminals 261a, 261b, 262a, and 262b.

  At this time, the terminal pins 481a, 481b, 482a, 482b are bent in the direction in which the winding terminals 261a, 261b, 262a, 262b are pulled out from the drive coils 261, 262. As a result, the tension applied to the drawn winding is relieved, and the winding terminals 261a, 261b, 262a, 262b can be slackened, so that the winding terminals 261a, 261b, 262a, 262b can be provided. The risk of wire breakage / damage can be reduced.

  Hereinafter, the operation of the disconnection preventing member 5 fixed to the motor 2 will be described. The shape of the disconnection preventing member 5 is the same as that in the first embodiment.

  The disconnection preventing member 5 attached to the motor 2 causes the following operation in addition to the same operation as that described in the first embodiment.

  As described above, when the terminal pins 481a, 481b, 482a, and 482b are bent, the tension applied to the drawn winding is relieved. At this time, when the disconnection preventing member 5 is not used, the windings from the drive coils 261 and 262 to the terminal pins 481a, 481b, 482a and 482b are largely loosened.

  On the other hand, in this embodiment, as shown in FIG. 7, since the disconnection preventing member 5 is interposed between the terminal block 38 and the peripheral edge 32a of the opening 32, the loosened winding terminal 261a. , 261b, 262a, 262b and the peripheral edge 32a of the opening 32 are prevented from breaking or damaging the winding terminals 261a, 261b, 262a, 262b.

  Further, when the terminal pins 481a, 481b, 482a, and 482b are inserted into the insertion holes formed in the power supply substrate 7 with the winding terminals 261a, 261b, 262a, and 262b slackened as described above, the peripheral edge of the insertion hole is obtained. As a result, the winding terminals 261a, 261b, 262a, 262b may be disconnected or damaged.

  On the other hand, in this embodiment, as shown in FIG. 8, since the disconnection preventing member 5 is fixed to the opening 32, even if the winding terminals 261a, 261b, 262a, 262b are greatly loosened, they are pulled out. The winding terminals 261a, 261b, 262a, 262b are always located in the gap S.

  Therefore, even if the terminal pins 481a, 481b, 482a, and 482b are inserted into the insertion holes 7a formed in the power supply substrate 7, the lead-out portion of the winding is covered with the disconnection prevention member 5, so that the peripheral edge of the insertion hole 7a The edges of the windings 261a, 261b, 262a, 262b will not be broken or damaged, leading to an improvement in the quality of the motor 2.

  Moreover, since the terminal pins 481a, 481b, 482a, and 482b are bent as in the present embodiment, an effect that the disconnection preventing member 5 is prevented from falling off is also achieved.

(Main effects of the embodiment)
Thus, according to the motor 1 (2) according to the present embodiment, the peripheral edge 32 a (edge portion) of the opening 32 formed in the first motor case 301 and the second motor case 302 is formed by the disconnection preventing member 5. Since it is covered, the winding terminals 261 a, 261 b, 262 a, and 262 b of the drive coils 261 and 262 drawn out from the opening 32 do not come into contact with the periphery of the opening 32. Therefore, disconnection / damage of the winding terminals 261a, 261b, 262a, 262b at the time of manufacturing the motor can be prevented, leading to a significant reduction in the defective rate in the motor assembling process and high quality of the motor.

  Further, the disconnection preventing member 5 is interposed between the peripheral edge of the opening 32 and the terminal block 38, and a gap S is provided between the disconnection preventing member 5 and the terminal block 5. Therefore, the winding terminals 261 a, 261 b, 262 a, 262 b of the drive coils 261, 262 can be easily pulled out from the gap S between the disconnection prevention member 5 and the terminal block 38, and the disconnection prevention member 5 and the terminal block 38 can be pulled out. Winding terminals 261a, 261b, 262a, 262b are prevented from being pinched and broken or damaged. Further, the gap S can restrict unnecessary movement of the winding terminals 261a, 261b, 262a, 262b.

  Moreover, the terminal block through-hole 5a which the terminal block 36 penetrates is formed in the disconnection prevention member 5, and the corner | angular part 5e by the side of the drive coil 261,262 in the terminal block through-hole 5a is formed in R shape. . Therefore, it is possible to prevent the winding terminals 261a, 261b, 262a, and 262b from being disconnected or damaged due to contact with the disconnection preventing member 5.

  Further, a pedestal portion 5 d is formed around the terminal block through-hole 5 a in the disconnection preventing member 5. Further, a power supply board 7 is disposed in the pedestal portion 5d, and insertion holes 7a of terminal pins 381a, 381b, 382a, 382b (481a, 481b, 482a, 482b) are formed in the power supply board 7. Yes. Thus, when the power supply board 7 is attached to the terminal pins 381a, 381b, 382a, 382b (481a, 481b, 482a, 482b), the pedestal portion 5d of the disconnection preventing member 5 serves as a pedestal for the power supply board 7, and thus winding. Connection work by soldering the wire terminals 261a, 261b, 262a, 262b and the power supply board 7 becomes easy.

  Further, the terminal pins 481a, 481b, 482a, 482b of the motor 2 according to the second embodiment are bent in the axial direction of the motor 2. Therefore, the height of the terminal pins 481a, 481b, 482a, 482b on the terminal block 38 can be reduced. Thereby, it is possible to reduce the size of the motor while securing a sufficient terminal pin length for binding the winding terminals 261a, 261b, 262a, 262b.

  Furthermore, in the case of the motor 2 according to the second embodiment, when the terminal pins 481a, 481b, 482a, 482b are bent, the drawn winding terminals 261a, 261b, 262a, 262b are largely loosened. However, even if the terminal pins 481a, 481b, 482a, and 482b are inserted into the insertion holes 7a formed in the power supply board 7, the lead-out portions of the windings are covered with the disconnection prevention member 5, so that the peripheral edge of the insertion hole 7a There is no fear that the winding terminals 261a, 261b, 262a, 262b are disconnected or damaged by the edges of the wires.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above embodiment, it has been described that the disconnection preventing member 5 is fixed to the opening 32 by press fitting, but may be fixed by adhesion or the like. Further, the technical idea of the present invention can be applied not only to the motor but also to other devices and apparatuses provided with a terminal pin around which an electric wire is entangled.

FIG. 1A is an external perspective view of a motor according to a first embodiment (FIG. 1A shows a state where a disconnection preventing member is not fixed, and FIG. 1B shows a state where a disconnection preventing member is fixed. ). FIG. 2 is a partial cross-sectional view in the longitudinal direction of the motor according to the first embodiment shown in FIG. 1 (FIG. 2A shows a state in which a disconnection preventing member is not fixed, and FIG. 2B shows disconnection prevention. The member is fixed.) It is an external appearance perspective view of a disconnection prevention member. It is sectional drawing to which the terminal block vicinity of the motor which concerns on 1st embodiment with which the disconnection prevention member was attached was expanded. It is the external appearance perspective view which showed the state by which the electric power feeding board was mounted in the terminal block of the motor which concerns on 1st embodiment. It is an external appearance perspective view of the motor which concerns on 2nd embodiment. It is sectional drawing to which the terminal block vicinity of the motor which concerns on 2nd embodiment shown in FIG. 6 was expanded. It is sectional drawing which expanded the terminal block vicinity at the time of a terminal pin being bent (FIG. 8 (a) shows the mode of the coil | winding terminal in the state where the disconnection prevention member is not being fixed, FIG.8 (b) is disconnection. The state of the winding terminal in a state where the prevention member is fixed is shown.). FIG. 9A is a partial cross-sectional view for explaining the configuration of a conventional motor, and FIG. 9B is an enlarged cross-sectional view of the vicinity of the terminal block of this motor.

Explanation of symbols

1 (2) Motor 5 Disconnection prevention member 5a Terminal block through- hole 5c Corner portion 5d Pedestal portion 12 Rotor 14 Rotating shaft 20 Stator 261, 262 Drive coil 261a, 261b Winding terminal 262a, 262b Winding terminal 301 First motor case 302 Second motor case 32 Opening 38 Terminal block 381a, 381b Terminal pin 382a, 382b Terminal pin 481a, 481b Terminal pin 482a, 482b Terminal pin

Claims (5)

A motor case, a stator core disposed in the motor case, a drive coil wound around the stator core, a terminal pin for energizing the drive coil, and an outer peripheral side of the stator core, the terminal pin being In a motor equipped with a provided terminal block ,
The motor case is formed with an opening for projecting the terminal block to the outer periphery,
A disconnection preventing member having an engaging portion that enters the inside of the opening and covers a peripheral edge of the opening, and a lower end contacting the outer peripheral surface of the motor case
The disconnection prevention member is formed with a terminal block through-hole through which the terminal block is inserted, and the winding of the drive coil passes through a gap between the inner surface of the terminal block through-hole and the outer surface of the terminal block. A motor characterized in that a wire terminal is drawn from the stator core and entangled with the terminal pin . Motor The motor according to claim 1, the corners of the drive coil of the terminal block through opening, characterized in that it is formed in the R shape. The motor according to claim 1 or 2, a motor, characterized in that the periphery of the terminal block through opening has pedestal is formed. The motor according to claim 3 , wherein a power supply board is disposed on the pedestal portion, and an insertion hole for the terminal pin is formed in the power supply board. The motor according to any one of claims 1 to 4, a motor in which the terminal pins, characterized in that it projects, and bent from the terminal block through opening.

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