WO2019239508A1 - Encoder and servomotor - Google Patents

Encoder and servomotor Download PDF

Info

Publication number
WO2019239508A1
WO2019239508A1 PCT/JP2018/022520 JP2018022520W WO2019239508A1 WO 2019239508 A1 WO2019239508 A1 WO 2019239508A1 JP 2018022520 W JP2018022520 W JP 2018022520W WO 2019239508 A1 WO2019239508 A1 WO 2019239508A1
Authority
WO
WIPO (PCT)
Prior art keywords
encoder
lead wire
substrate
cover
axial direction
Prior art date
Application number
PCT/JP2018/022520
Other languages
French (fr)
Japanese (ja)
Inventor
雅史 大熊
大輔 金森
政範 二村
佐土根　俊和
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201880010281.5A priority Critical patent/CN110832285B/en
Priority to JP2018563530A priority patent/JP6479297B1/en
Priority to PCT/JP2018/022520 priority patent/WO2019239508A1/en
Priority to KR1020197021878A priority patent/KR102157817B1/en
Priority to TW108119420A priority patent/TWI707124B/en
Publication of WO2019239508A1 publication Critical patent/WO2019239508A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/24428—Error prevention
    • G01D5/24433—Error prevention by mechanical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train

Definitions

  • the present invention relates to an encoder and a servo motor that detect the rotational position of a rotor.
  • Patent Document 1 discloses a technique for reducing the size of an encoder.
  • an insulating member is provided in the gap between the inner surface of the cover and the outer peripheral portion of the substrate in order to reduce the size of the encoder.
  • the cover is a conductive member formed in a bottomed cylindrical shape that covers a substrate on which an electronic component is provided in order to suppress a decrease in insulation performance due to intrusion of dust, metal pieces, or the like into the encoder.
  • the axial length of the cylindrical portion of the cover is increased by the wire diameter of the encoder lead wire so that the extra length portion of the encoder lead wire is not sandwiched in the gap.
  • the axial length of the cover becomes long, and there is a problem that the encoder as a whole cannot be further reduced in size.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain an encoder that can be reduced in size even when an extra length portion exists in an encoder lead wire wired inside a cover.
  • an encoder includes a substrate having a first substrate surface and a second substrate surface opposite to the first substrate surface, and a first substrate surface.
  • a cylindrical substrate fixing portion having an end portion in contact with the substrate and a substrate fixed to the end portion, provided at a position facing the second substrate surface, electrically connected to the substrate, and a signal indicating the rotational position of the rotor
  • the encoder includes an electronic component provided on the second substrate surface, a bottom portion facing the electronic component, and a cylindrical portion that is rotatably fitted to the outer peripheral portion of the substrate fixing portion and has an opening through which at least the encoder lead wire passes. And a bottomed cylindrical cover.
  • the encoder is provided in a cylindrical part, extends in a direction along the rotation direction of the cover from the edge of the opening, and includes a suppressing part that suppresses the positional deviation of the encoder lead wire in the axial direction of the board fixing part. To do.
  • the encoder according to the present invention has an effect that the encoder lead wire provided inside the cover can be reduced in size even when an extra length portion exists.
  • FIG. 1 The perspective view of the encoder which concerns on Embodiment 1 of this invention
  • FIG. 2 shows a state in which the extra length portion of the encoder lead shown in FIG. 1 moves.
  • FIG. 3 shows a state in which the extra length portion of the encoder lead shown in FIG. 1 moves.
  • FIG. 4 shows a state in which the extra length portion of the encoder lead shown in FIG. 1 moves.
  • FIG. 1 is a perspective view of an encoder according to Embodiment 1 of the present invention.
  • FIG. 2 is a view showing an opening formed in the cover shown in FIG.
  • the encoder 100-1 according to the first embodiment includes a substrate 1 having a first substrate surface 1a and a second substrate surface 1b opposite to the first substrate surface 1a, and an electron provided on the second substrate surface 1b.
  • the component 2 has an end portion 3a in contact with the first substrate surface 1a, and is provided at a position facing the second substrate surface 1b and a cylindrical substrate fixing portion 3 to which the substrate 1 is fixed to the end portion 3a.
  • 1 and an encoder lead wire 4 that is electrically connected to 1 and transmits a signal indicating the rotational position of the rotor.
  • the encoder 100-1 has an outer peripheral portion of the cylindrical portion 8a of the bracket 8 so that the bottom portion 5a facing the electronic component 2 and the gap between the electronic component 2 and the bottom portion 5a are smaller than the wire diameter of the encoder lead wire 4.
  • a bottomed cylindrical cover 5 having a cylindrical portion 5b that is rotatably fitted in 8a1 and has an opening through which at least the encoder lead wire 4 passes, and an axial direction of the substrate fixing portion 3 provided in the cylindrical portion 5b.
  • a suppressing portion 6 that suppresses the positional deviation of the encoder lead wire 4.
  • the axial direction in which the central axis AX passing through the center in the radial direction of the substrate fixing portion 3 extends is equal to the direction indicated by reference sign D1 in FIGS.
  • the rotation direction of the cover 5 is equal to the direction indicated by reference sign D2 in FIGS.
  • the substrate fixing portion 3 is detachably fixed to the end portion in the axial direction of the cylindrical portion 8a of the bracket 8 by using a screw 7.
  • the bracket 8 includes a plate-like plate portion 8b that is a member that closes an axial end portion of a motor case (not shown), and a cylindrical portion 8a provided on an end surface of the plate portion 8b on the substrate fixing portion 3 side. .
  • the cylindrical portion 8a may be manufactured integrally with the plate portion 8b using an insulating material. Examples of the insulating material include polybutylene terephthalate, polyphenylene sulfide, and a liquid crystal polymer.
  • the outer diameter of the cylindrical portion 8 a of the bracket 8 is larger than the outer diameter of the substrate fixing portion 3 and is substantially equal to the inner diameter of the cylindrical portion 5 b of the cover 5.
  • the board fixing portion 3 is manufactured separately from the cylindrical portion 8a of the bracket 8 using the above insulating material and then attached to the bracket 8.
  • the insulating portion is used to attach the cylindrical portion 8a of the bracket 8 to the cylindrical portion 8a. It may be manufactured integrally.
  • the substrate fixing part 3 by die casting using the insulating resin, the substrate fixing part 3 having a complicated shape can be manufactured at low cost.
  • the substrate fixing portion 3 is manufactured by integral molding with the cylindrical portion 8a of the bracket 8. In this case, the entire board fixing part 3 and cylindrical part 8a manufactured by integral molding may be used as the board fixing part 3 or the bracket 8.
  • a protrusion 3 c is formed on the substrate fixing portion 3.
  • the protrusion 3 c is a protruding member extending in the axial direction from the end 3 a of the substrate fixing portion 3.
  • the protrusion 3 c is formed at a corner formed by the end 3 a of the substrate fixing portion 3 and the outer peripheral portion 3 b of the substrate fixing portion 3.
  • the end 3 a of the substrate fixing part 3 is an end opposite to the bracket 8 side of the substrate fixing part 3.
  • only one protrusion 3c is shown to simplify the description, but it is assumed that a plurality of protrusions 3c are provided, and the plurality of protrusions 3c are arranged away from each other in the rotation direction.
  • FIG. 1 only one protrusion 3c is shown to simplify the description, but it is assumed that a plurality of protrusions 3c are provided, and the plurality of protrusions 3c are arranged away from each other in the rotation direction.
  • the protrusion 3c is fitted into a recess 1 d formed on the outer side in the radial direction of the substrate 1.
  • the recess 1 d is a concave portion having a protruding shape from the outer peripheral portion 1 c of the substrate 1 toward the radial center of the substrate 1.
  • An adhesive (not shown) is provided between the protrusion 3c and the recess 1d. By providing the adhesive, the contact area between the recess 1d of the substrate 1 and the protrusion 3c is increased as compared with the case where the adhesive is not provided, and the substrate 1 is firmly fixed to the substrate fixing portion 3.
  • the length of the projection 3c in the axial direction is not limited as long as the substrate 1 can be held.
  • the projection 1c has a thickness in the axial direction so that the tip of the projection 3c protrudes beyond the second substrate surface 1b. It may be longer than the corresponding dimension.
  • a motor lead wire (not shown) wired outside in the radial direction of the protrusion 3c approaches the substrate 1, and noise from the motor lead wire 2 is provided on the substrate 1.
  • the influence on the position detection unit can be suppressed. Therefore, a decrease in the detection accuracy of the rotational position of the rotor can be suppressed by lengthening the protrusion 3c.
  • the motor lead wire is a wiring for supplying electric power to a motor (not shown).
  • the electronic component 2 may be, for example, a component that forms a signal generation circuit that generates a signal indicating the rotational position of the rotor detected by the position detection unit, a signal output circuit that outputs the signal to the encoder lead wire 4, It may be a component constituting a power supply circuit that supplies power supplied from a servo amplifier provided outside the encoder 100-1 to a position detection unit or the like.
  • the electronic component 2 is, for example, an IC (Integrated Circuit), a resistor, a coil, or a capacitor. There may be one electronic component 2 or a plurality of electronic components 2. In FIG. 1 and FIG. 2, the electronic component 2 is simulated by a cylindrical structure in order to simplify the description.
  • the position detection unit is an optical component that detects the rotational position of a rotor (not shown).
  • the position detection unit is provided on the first substrate surface 1 a of the substrate 1 inside the substrate fixing unit 3.
  • the first substrate surface 1 a is an end surface of the substrate 1 that faces the substrate fixing unit 3.
  • the first connector 9 is provided on the second substrate surface 1 b of the substrate 1.
  • the second substrate surface 1 b is an end surface of the substrate 1 that faces the bottom 5 a of the cover 5.
  • the first connector 9 is electrically connected to the electronic component 2 and the position detection unit via the pattern wiring on the substrate 1.
  • a second connector 10 is connected to the first connector 9.
  • One end of the encoder lead wire 4 is connected to the second connector 10.
  • the encoder lead wire 4 is electrically connected to the electronic component 2 and the position detection unit.
  • the connection of the encoder lead wire 4 to the substrate 1 is facilitated.
  • the encoder lead wire 4 only needs to be electrically connected to the electronic component 2 and is soldered directly to, for example, a wiring pattern on the substrate 1 without using the first connector 9 and the second connector 10. May be connected by.
  • FIG. 1 and FIG. 2 one encoder lead wire 4 is shown to simplify the description, but the encoder lead wire 4 is a signal group composed of a plurality of signal lines.
  • the third connector 11 is connected to the other end of the encoder lead wire 4.
  • the third connector 11 is connected to the relay connector 12.
  • the relay connector 12 is a connector for connecting the encoder lead wire 4 and a motor lead wire (not shown) to a servo amplifier provided outside the encoder 100-1.
  • a cable 13 extending from the servo amplifier is connected to the relay connector 12.
  • the relay connector 12 is fixed to the outer peripheral portion 5d of the cylindrical portion 5b of the cover 5 so as to close the opening 14 formed in the cylindrical portion 5b of the cover 5. Details of the opening 14 will be described later.
  • the relay connector 12 is connected to a motor lead wire.
  • the cover 5 is a component for suppressing a decrease in insulation performance due to intrusion of dust, metal pieces, etc. into the encoder 100-1.
  • the cover 5 may be a cylinder formed by die casting using the insulating material described above, or a cylinder formed by die casting using a metal such as copper alloy, cast iron, steel, or iron alloy. But you can. By manufacturing the cover 5 with metal, an electronic circuit existing inside the cover 5 is protected from a magnetic field outside the cover 5.
  • an O-ring (not shown) is provided between the inner peripheral surface 5b1 of the cylindrical portion 5b of the cover 5 and the outer peripheral portion 8a1 of the cylindrical portion 8a of the bracket 8, for example.
  • the O-ring closes the gap between the cylindrical portion 8a of the bracket 8 and the cover 5, so that dust, metal pieces, etc. Infiltration can be suppressed.
  • a flange 5 e that extends radially outward from the outer peripheral portion 5 d of the cylindrical portion 5 b of the cover 5 is formed on the opening end 5 c side of the cover 5.
  • the cover 5 is fixed to the bracket 8 by screwing the screw 7 from the flange portion 5 e toward the plate portion 8 b of the bracket 8.
  • the suppression unit 6 is a member for suppressing the positional deviation of the encoder lead wire 4 in the axial direction when the cover 5 is rotated.
  • the suppression unit 6 may be manufactured integrally with the cover 5 or may be manufactured separately from the cover 5. When the restraining part 6 manufactured separately from the cover 5 is used, the restraining part 6 is fixed to the wall surface 15 forming the opening 14 by bonding or the like.
  • the suppressing portion 6 extends from the first wall surface 151 in the rotation direction of the cover 5 to the second wall surface 152 facing the first wall surface 151 among the wall surfaces 15 forming the opening 14.
  • the suppressing unit 6 extends from the edge of the opening 14 in a direction along the rotation direction of the cover 5.
  • a recessed first space 16 is formed between the first end surface 61.
  • the axial width of the first space 16 is wider than the wire diameter of the encoder lead wire 4. Since the encoder lead wire 4 is composed of a plurality of signal lines as described above, the wire diameter of the encoder lead wire 4 may be the thickness of a signal line group obtained by bundling a plurality of signal lines.
  • the fourth wall surface 154 located on the opening end 5 c side of the cover 5 among the wall surfaces 15 forming the opening 14, and the suppressing portion 6 facing the fourth wall surface 154.
  • a second space 17 through which a motor lead wire (not shown) passes is formed between the second end face 62 and the second end face 62.
  • the board 1 When assembling the encoder 100-1, the board 1 is first installed on the board fixing part 3, and then the first connector 9 is connected to the second connector 10. After the first connector 9 is connected to the second connector 10, the third connector 11 provided on the encoder lead wire 4 is connected to the cylindrical portion of the cover 5 from the inside of the cylindrical portion 5 b of the cover 5 through the opening 14. It is pulled out of 5b. After the third connector 11 is pulled out to the outside of the cylindrical portion 5 b of the cover 5, the relay connector 12 is connected to the third connector 11.
  • the encoder lead wire 4 needs to have a surplus length.
  • the encoder lead wire 4 has an extra length
  • the cylindrical portion 5b of the cover 5 is fitted into the cylindrical portion 8a of the bracket 8
  • the extra length portion of the encoder lead wire 4 is connected to the bottom portion 5a of the cover 5 and the electronic part.
  • the encoder 100-1 according to the first embodiment has a structure in which the cover 5 is rotatably fitted into the cylindrical portion 8a of the bracket 8, so that the cylindrical portion 5b of the cover 5 is fitted into the cylindrical portion 8a of the bracket 8.
  • FIG. 3 is a first view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves.
  • FIG. 4 is a second view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves.
  • FIG. 5 is a third view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves.
  • FIG. 6 is a fourth view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves.
  • FIG. 3 shows a state where the extra length portion 4A of the encoder lead wire 4 is sandwiched in the gap CL1 between the bottom 5a of the cover 5 and the electronic component 2.
  • the extra length portion 4A is, for example, an intermediate portion in a range from one end of the encoder lead wire 4 to the other end.
  • the extra length portion 4 ⁇ / b> A of the encoder lead wire 4 is between the bottom 5 a of the cover 5 and the electronic component 2.
  • the electronic component 2 and the cylindrical portion 5b of the cover 5 are pushed out from the gap CL1 into a region 18 facing each other.
  • the encoder 100-1 has a structure in which the cover 5 is rotatably fitted in the cylindrical portion 8a of the bracket 8, so that the encoder 100-1 is interposed between the bottom portion 5a of the cover 5 and the electronic component 2. Even when the extra length portion 4A of the lead wire 4 is sandwiched, the extra length portion 4A of the encoder lead wire 4 is moved to the region 18 where the electronic component 2 and the cylindrical portion 5b of the cover 5 face each other by rotating the cover 5. Can be made. Therefore, in consideration of the connection workability of the third connector 11, even when the encoder lead wire 4 has an extra length, the wire of the encoder lead wire 4 sandwiched between the bottom portion 5 a of the cover 5 and the electronic component 2.
  • the axial length of the encoder 100-1 can be shortened by the wire diameter of the encoder lead wire 4.
  • the encoder lead wire 4 is sandwiched in the gap CL.
  • the second connector 10 is located near the opening 14 of the cover 5.
  • the cover 5 is fitted into the cylindrical portion 8a of the bracket 8 while the electronic component 2 is disposed, the electronic component 2 is not disposed on the line connecting the second connector 10 and the opening 14. Therefore, when the cover 5 is fitted in this way, the encoder lead wire 4 can be prevented from being caught in the gap CL, and the extra length portion 4A of the encoder lead wire 4 is moved to the region 18 by rotating the cover 5. Can be made.
  • the suppressing portion 6 is provided in the opening portion. Therefore, it is possible to suppress the encoder lead wire 4 from moving in the axial direction during the rotation of the cover 5 and being caught in the gap CL shown in FIG. 1, for example. Therefore, the rotation of the cover 5 becomes smooth, and the assembly workability of the encoder 100-1 is improved.
  • the position of the suppressing portion 6 may be a position where the encoder lead wire 4 can suppress movement in the axial direction.
  • the position of the first end surface 61 of the suppressing portion 6 shown in FIG. 2 in the axial direction is shown in FIG. It may be closer to the bracket 8 than the position of the second substrate surface 1b of the substrate 1 in the axial direction.
  • the gap CL has a radial width between at least a part of the outer peripheral portion 1c of the substrate 1 facing the inner peripheral surface 5b1 of the cylindrical portion 5b and the inner peripheral surface 5b1 of the cylindrical portion 5b facing the region. equal.
  • the encoder 100-1 according to the first embodiment may be configured such that the gap CL is smaller than the wire diameter of the encoder lead wire 4.
  • the diameter of the cylindrical portion 5b of the cover 5 can be made smaller than when the gap CL is larger than the wire diameter of the encoder lead wire 4, and the radial dimension of the encoder 100-1 is made smaller.
  • the gap CL is configured to be smaller than the wire diameter of the encoder lead wire 4, it is possible to prevent the extra length portion 4A of the encoder lead wire 4 from moving from the gap CL to the substrate fixing portion 3 side. it can. Therefore, it is possible to prevent the distance from the motor lead wire (not shown) wired near the board fixing portion 3 to the encoder lead wire 4 from being shortened. Therefore, it is difficult for noise from the motor lead wire to be superimposed on the encoder lead wire 4, and a decrease in detection accuracy of the rotational position of the rotor can be suppressed.
  • FIG. 7 is a side view of a cover provided in the encoder according to the first modification of the first embodiment.
  • the cover 5 shown in FIG. 7 is provided with a suppressing portion 6A instead of the suppressing portion 6 shown in FIG.
  • the cover 5 shown in FIG. 7 has a width W1 from the first end surface 61 on the bottom 5a side of the suppressing portion 6A to the bottom 5a in the axial direction, and a width from the second substrate surface 1b to the bottom 5a of the substrate 1 in the axial direction. It is configured to be narrower than W2.
  • FIG. 8 is a side view of a cover provided in the encoder according to the second modification of the first embodiment.
  • the cover 5 shown in FIG. 8 is provided with the suppressing portion 6 ⁇ / b> A shown in FIG. 7, and further provided with a first protrusion 63.
  • the first protrusion 63 is a protruding member that extends in the axial direction from the first end surface 61 of the suppressing portion 6 ⁇ / b> A in order to suppress the displacement of the encoder lead wire 4 in the rotational direction.
  • the first protrusion 63 may be manufactured integrally with the suppressing portion 6A, or may be manufactured separately from the suppressing portion 6A and then attached to the suppressing portion 6A.
  • the first protrusion 63 only needs to be able to suppress displacement of the encoder lead wire 4 in the rotational direction, and the shape of the first protrusion 63 is not limited to the shape shown in the example of the drawing.
  • FIG. FIG. 9 is a perspective view of an encoder according to Embodiment 2 of the present invention.
  • the substrate fixing unit 3A is used instead of the substrate fixing unit 3.
  • the substrate fixing portion 3A is fixed to the cylindrical portion 8a of the bracket 8.
  • a through-hole 31 is formed in the cylindrical portion 8 a of the bracket 8 so that the inside of the bracket 8 communicates with the space inside the cover 5.
  • a concave portion 32 is formed in the substrate fixing portion 3A.
  • the concave portion 32 is a space having a shape in which a part of the entire outer peripheral portion 3b of the substrate fixing portion 3A is recessed radially inward.
  • the recess 32 extends in the rotation direction of the substrate fixing portion 3A and functions as a wiring path through which the motor lead wire 19 passes.
  • the motor lead wire 19 is passed through the through hole 31 of the cylindrical portion 8a.
  • One end of the motor lead wire 19 is connected to a motor (not shown), and the other end of the motor lead wire 19 is connected to the fourth connector 20.
  • the fourth connector 20 is connected to the relay connector 12 shown in FIG.
  • the substrate fixing portion 3A is provided with a protrusion similar to the protrusion 3c shown in FIG.
  • the substrate 1 is first installed on the substrate fixing portion 3A, and then the first connector 9 is connected to the second connector 10. Furthermore, one end of the motor lead wire 19 is inserted into the through hole 31 of the cylindrical portion 8a.
  • the third connector 11 and the fourth connector 20 are drawn from the inside of the cylindrical portion 5 b of the cover 5 to the outside of the cylindrical portion 5 b of the cover 5 through the opening 14.
  • the motor lead wire 19 is wired in the concave portion 32 of the substrate fixing portion 3 ⁇ / b> A, and further wired at a position facing the second end face 62 side of the suppressing portion 6.
  • the relay connector 12 is connected to the third connector 11 and the fourth connector 20. Thereafter, the cylindrical portion 5b of the cover 5 is fitted into the cylindrical portion 8a. Since the motor lead wire 19 is wired in the concave portion 32 of the substrate fixing portion 3A, the cylindrical portion 5b of the cover 5 does not interfere with the motor lead wire 19. Thereafter, the cover 5 is rotated, and finally the relay connector 12 is fixed to the cylindrical portion 5 b of the cover 5.
  • the encoder 100-2 according to the second embodiment has a structure in which the cover 5 is rotatably fitted in the board fixing portion 3A, like the encoder 100-1 according to the first embodiment. Even when the extra length portion 4A of the encoder lead wire 4 is sandwiched between the electronic component 2, the encoder lead is placed in a region 18 where the electronic component 2 and the cylindrical portion 5b of the cover 5 face each other by rotating the cover 5. The extra length portion 4A of the line 4 can be moved.
  • the motor lead wire 19 is wired at a position facing the second end face 62 side of the suppressing portion 6, the motor lead wire 19 is pivoted while the cover 5 is rotating. The movement in the direction can be suppressed. Therefore, the motor lead wire 19 can be prevented from moving in the axial direction and being caught in the gap CL shown in FIG. As a result, the rotation of the cover 5 becomes smooth, and the assembly workability of the encoder 100-2 is improved.
  • the encoder lead wire 4 and the motor lead wire 19 are rotated while the cover 5 is rotated while the encoder lead wire 4 and the motor lead wire 19 are separated in the axial direction. Positional displacement in the axial direction can be suppressed. Therefore, the distance from the motor lead wire 19 to the encoder lead wire 4 becomes longer than when both the encoder lead wire 4 and the motor lead wire 19 are passed through, for example, the first end face 61 side of the suppressing portion 6. The noise from the motor lead wire 19 is not easily transmitted to the encoder lead wire 4. Therefore, it is possible to prevent the detection accuracy of the rotational position of the rotor from being lowered due to noise from the motor lead wire 19.
  • FIG. 10 is a side view of a cover provided in the encoder according to the first modification of the second embodiment.
  • the cover 5 shown in FIG. 10 is provided with a suppressing part 6B instead of the suppressing part 6 shown in FIG.
  • the cover 5 shown in FIG. 10 has a width W3 from the second end surface 62 of the restraining portion 6B in the axial direction to the opening end 5c of the cover 5 such that the opening end of the cover 5 from the first substrate surface 1a of the substrate 1 in the axial direction. It is configured to be narrower than the width W4 up to 5c.
  • the motor lead wire 19 can be prevented from being caught in the gap CL shown in FIG. 9 while the cover 5 is rotating. Therefore, for example, the rotation of the cover 5 is compared with the case where the position in the axial direction of the second end surface 62 of the suppressing portion 6B is closer to the bottom 5a side of the cover 5 than the position in the axial direction of the first substrate surface 1a of the substrate 1. As a result, the assembling workability of the encoder 100-2 is improved.
  • the position in the axial direction of the second end surface 62 of the suppressing portion 6 ⁇ / b> B is closer to the bottom 5 a side of the cover 5 than the position in the axial direction of the first substrate surface 1 a of the substrate 1.
  • substrate 1 can be extended. Accordingly, the axial distance between the motor lead wire 19 and the encoder lead wire 4 passing through the opening 14 is widened, and noise from the motor lead wire 19 is not easily transmitted to the encoder lead wire 4. As a result, it is possible to prevent the detection accuracy of the rotational position of the rotor from being lowered due to noise from the motor lead wire 19.
  • cover 5 shown in FIG. 10 may be configured such that the width W1 is narrower than the width W2, similarly to the cover 5 shown in FIG. By comprising in this way, the effect similar to the cover 5 shown in FIG. 7 is acquired.
  • FIG. 11 is a side view of a cover provided in the encoder according to the second modification of the second embodiment.
  • the cover 5 shown in FIG. 11 is provided with the suppressing portion 6B of FIG. 10, and further provided with a first protrusion 63 and a second protrusion 64.
  • the second protrusion 64 is a protruding member that extends in the axial direction from the second end face 62 of the suppressing portion 6 ⁇ / b> B in order to suppress displacement of the motor lead wire 19 in the rotational direction.
  • the second protrusion 64 may be manufactured integrally with the suppressing portion 6B, or may be manufactured separately from the suppressing portion 6B and then attached to the suppressing portion 6B.
  • the second protrusion 64 only needs to be able to suppress displacement of the motor lead wire 19 in the rotational direction, and the shape thereof is not limited to the shape shown in the drawing.
  • the encoder lead wire 4 and the motor lead wire 19 is connected to the relay connector 12, whereby the servo amplifier is connected via the relay connector 12. And electrically connected. Accordingly, the length of the encoder lead wire 4 or the motor lead wire 19 can be shortened compared to the case where the relay connector 12 is not provided, and the work of passing the encoder lead wire 4 or the motor lead wire 19 through the opening 14 is facilitated. Thus, the assembly time of the encoders 100-1 and 100-2 is shortened.
  • FIG. 12 is an external view of a servo motor according to Embodiment 3 of the present invention.
  • a servo motor 200 shown in FIG. 12 is a motor used for a machine tool such as a machining center, an NC lathe, a laser machine, an electric discharge machine, or the like.
  • Servo motor 200 includes motor 300 and encoder 100-1 according to the first embodiment.
  • the motor 300 includes a case 301, a bracket 8 provided at an end of the case 301, a rotor (not shown) provided in the case 301, and a shaft 302 provided in the rotor.
  • the servo motor 200 according to the third embodiment may use the encoder 100-2 according to the second embodiment instead of the encoder 100-1 according to the first embodiment.
  • the encoder 100-1 of the first embodiment or the encoder 100-2 of the second embodiment is used, the axial length of the cylindrical portion 5b of the cover 5 is shortened, and the entire servo motor 200 is further updated. The size can be reduced.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

Abstract

An encoder (100-1) comprises a substrate (1), a substrate-fixing part (3), and an encoder lead wire (4). The encoder (100-1) comprises: an electronic component (2) provided to a second substrate surface (1b); and a bottomed cylindrical cover (5) having a bottom portion (5a) which faces the electronic component (2), and a cylinder portion (5b) which is rotatably fit to the outer periphery (3b) of the substrate-fixing part (3) and in which is formed an opening (14) through which at least the encoder lead wire (4) is passed. The encoder (100-1) is provided with an inhibiting portion which extends from an edge of the opening (14) in a direction following the rotation direction of the cover (5) and inhibits misalignment of the encoder lead wire (4) in the axial direction of the substrate-fixing part (3).

Description

エンコーダ及びサーボモータEncoder and servo motor
　本発明は、ロータの回転位置を検出するエンコーダ及びサーボモータに関する。 The present invention relates to an encoder and a servo motor that detect the rotational position of a rotor.
　特許文献１には、エンコーダの小型化を図るための技術が開示されている。特許文献１に開示されるエンコーダでは、エンコーダの小型化を図るため、カバーの内側面と基板の外周部との間の隙間に、絶縁部材が設けられている。カバーは、エンコーダ内部への塵埃、金属片などの浸入による絶縁性能の低下を抑制するため、電子部品が設けられる基板を覆う有底筒状に形成される導電性の部材である。絶縁部材を設けることにより、カバーの筒状部と基板との間の隙間を狭くしても、カバー内に設けられる配線部材とカバーの筒状部との間で生じる誘起電圧の上昇が抑制される。そのため、エンコーダの機能の低下を抑制しながら、エンコーダの径方向の大きさを小さくすることができる。 Patent Document 1 discloses a technique for reducing the size of an encoder. In the encoder disclosed in Patent Document 1, an insulating member is provided in the gap between the inner surface of the cover and the outer peripheral portion of the substrate in order to reduce the size of the encoder. The cover is a conductive member formed in a bottomed cylindrical shape that covers a substrate on which an electronic component is provided in order to suppress a decrease in insulation performance due to intrusion of dust, metal pieces, or the like into the encoder. By providing the insulating member, an increase in the induced voltage between the wiring member provided in the cover and the cylindrical portion of the cover is suppressed even if the gap between the cylindrical portion of the cover and the substrate is narrowed. The Therefore, it is possible to reduce the size of the encoder in the radial direction while suppressing a decrease in the function of the encoder.
国際公開第２０１３／０９８９３５号International Publication No. 2013/098935
　しかしながら、特許文献１に開示されるエンコーダでは、エンコーダリード線を、外部機器に接続する際の作業性を考慮して、エンコーダリード線に余長を持たせる必要がある。そのため、カバーの筒状部に形成される開口部にエンコーダリード線を通した後、カバーの筒状部をモータブラケットに近づけるように移動させるとき、エンコーダリード線の余長部分が、カバーの底部と向き合う位置に配置される電子部品と、カバーの底部との間の隙間に挟まる可能性がある。当該隙間にエンコーダリード線の余長部分が挟まった場合、カバーをモータブラケットへ確実に固定できない。従って、特許文献１に開示されるエンコーダでは、当該隙間にエンコーダリード線の余長部分が挟まらないようにするため、カバーの筒状部の軸方向長を、エンコーダリード線の線径分長くしなければならない。その結果、カバーの軸方向長が長くなり、エンコーダ全体の更なる小型化を図ることができないという課題があった。 However, in the encoder disclosed in Patent Document 1, it is necessary to allow the encoder lead wire to have an extra length in consideration of workability when connecting the encoder lead wire to an external device. Therefore, after passing the encoder lead wire through the opening formed in the cylindrical portion of the cover, when the cover cylindrical portion is moved closer to the motor bracket, the extra length of the encoder lead wire is There is a possibility of being caught in a gap between the electronic component arranged at a position facing the bottom and the bottom of the cover. If the extra length of the encoder lead wire is caught in the gap, the cover cannot be securely fixed to the motor bracket. Therefore, in the encoder disclosed in Patent Document 1, the axial length of the cylindrical portion of the cover is increased by the wire diameter of the encoder lead wire so that the extra length portion of the encoder lead wire is not sandwiched in the gap. Must. As a result, the axial length of the cover becomes long, and there is a problem that the encoder as a whole cannot be further reduced in size.
　本発明は、上記に鑑みてなされたものであって、カバーの内部に配線されるエンコーダリード線に余長部分が存在する場合でも小型化できるエンコーダを得ることを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to obtain an encoder that can be reduced in size even when an extra length portion exists in an encoder lead wire wired inside a cover.
　上述した課題を解決し、目的を達成するために、本発明のエンコーダは、第１基板面と第１基板面側とは逆側の第２基板面とを有する基板と、第１基板面が接する端部を有し、端部に基板が固定される円筒形状の基板固定部と、第２基板面と向き合う位置に設けられ、基板と電気的に接続され、ロータの回転位置を示す信号が伝送されるエンコーダリード線とを備える。エンコーダは、第２基板面に設けられる電子部品と、電子部品と向き合う底部と、基板固定部の外周部に回転可能に嵌め込まれると共に少なくともエンコーダリード線が通る開口部が形成される円筒部とを有する有底円筒状のカバーとを備える。エンコーダは、円筒部に設けられ、開口部の縁からカバーの回転方向に沿った向きに伸び、基板固定部の軸方向へのエンコーダリード線の位置ずれを抑制する抑制部を備えることを特徴とする。 In order to solve the above-described problems and achieve the object, an encoder according to the present invention includes a substrate having a first substrate surface and a second substrate surface opposite to the first substrate surface, and a first substrate surface. A cylindrical substrate fixing portion having an end portion in contact with the substrate and a substrate fixed to the end portion, provided at a position facing the second substrate surface, electrically connected to the substrate, and a signal indicating the rotational position of the rotor An encoder lead wire to be transmitted. The encoder includes an electronic component provided on the second substrate surface, a bottom portion facing the electronic component, and a cylindrical portion that is rotatably fitted to the outer peripheral portion of the substrate fixing portion and has an opening through which at least the encoder lead wire passes. And a bottomed cylindrical cover. The encoder is provided in a cylindrical part, extends in a direction along the rotation direction of the cover from the edge of the opening, and includes a suppressing part that suppresses the positional deviation of the encoder lead wire in the axial direction of the board fixing part. To do.
　本発明に係るエンコーダは、カバーの内部に設けられるエンコーダリード線に余長部分が存在する場合でも小型化できるという効果を奏する。 The encoder according to the present invention has an effect that the encoder lead wire provided inside the cover can be reduced in size even when an extra length portion exists.
本発明の実施の形態１に係るエンコーダの斜視図The perspective view of the encoder which concerns on Embodiment 1 of this invention 図１に示すカバーに形成される開口部を示す図The figure which shows the opening part formed in the cover shown in FIG. 図１に示すエンコーダリード線の余長部分が移動する状態を示す第１図FIG. 1 shows a state where the extra length portion of the encoder lead shown in FIG. 1 moves. 図１に示すエンコーダリード線の余長部分が移動する状態を示す第２図FIG. 2 shows a state in which the extra length portion of the encoder lead shown in FIG. 1 moves. 図１に示すエンコーダリード線の余長部分が移動する状態を示す第３図FIG. 3 shows a state in which the extra length portion of the encoder lead shown in FIG. 1 moves. 図１に示すエンコーダリード線の余長部分が移動する状態を示す第４図FIG. 4 shows a state in which the extra length portion of the encoder lead shown in FIG. 1 moves. 実施の形態１の第１変形例に係るエンコーダに設けられるカバーの側面図Side view of a cover provided in an encoder according to a first modification of the first embodiment. 実施の形態１の第２変形例に係るエンコーダに設けられるカバーの側面図Side view of a cover provided in an encoder according to a second modification of the first embodiment 本発明の実施の形態２に係るエンコーダの斜視図The perspective view of the encoder which concerns on Embodiment 2 of this invention. 実施の形態２の第１変形例に係るエンコーダに設けられるカバーの側面図Side view of a cover provided in an encoder according to a first modification of the second embodiment 実施の形態２の第２変形例に係るエンコーダに設けられるカバーの側面図Side view of a cover provided in an encoder according to a second modification of the second embodiment 本発明の実施の形態３に係るサーボモータの外観図External view of servo motor according to Embodiment 3 of the present invention
　以下に、本発明の実施の形態に係るエンコーダ及びサーボモータを図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, an encoder and a servo motor according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態１．
　図１は本発明の実施の形態１に係るエンコーダの斜視図である。図２は図１に示すカバーに形成される開口部を示す図である。実施の形態１に係るエンコーダ１００－１は、第１基板面１ａと第１基板面１ａ側とは逆側の第２基板面１ｂとを有する基板１と、第２基板面１ｂに設けられる電子部品２と、第１基板面１ａが接する端部３ａを有し、端部３ａに基板１が固定される円筒形状の基板固定部３と、第２基板面１ｂと向き合う位置に設けられ、基板１と電気的に接続され、ロータの回転位置を示す信号が伝送されるエンコーダリード線４とを備える。またエンコーダ１００－１は、電子部品２と向き合う底部５ａと、電子部品２と底部５ａとの間の隙間がエンコーダリード線４の線径よりも小さくなるようにブラケット８の円筒部８ａの外周部８ａ１に回転可能に嵌め込まれると共に少なくともエンコーダリード線４が通る開口部が形成される円筒部５ｂとを有する有底円筒状のカバー５と、円筒部５ｂに設けられ基板固定部３の軸方向へのエンコーダリード線４の位置ずれを抑制する抑制部６とを備える。 Embodiment 1 FIG.
FIG. 1 is a perspective view of an encoder according to Embodiment 1 of the present invention. FIG. 2 is a view showing an opening formed in the cover shown in FIG. The encoder 100-1 according to the first embodiment includes a substrate 1 having a first substrate surface 1a and a second substrate surface 1b opposite to the first substrate surface 1a, and an electron provided on the second substrate surface 1b. The component 2 has an end portion 3a in contact with the first substrate surface 1a, and is provided at a position facing the second substrate surface 1b and a cylindrical substrate fixing portion 3 to which the substrate 1 is fixed to the end portion 3a. 1 and an encoder lead wire 4 that is electrically connected to 1 and transmits a signal indicating the rotational position of the rotor. Also, the encoder 100-1 has an outer peripheral portion of the cylindrical portion 8a of the bracket 8 so that the bottom portion 5a facing the electronic component 2 and the gap between the electronic component 2 and the bottom portion 5a are smaller than the wire diameter of the encoder lead wire 4. A bottomed cylindrical cover 5 having a cylindrical portion 5b that is rotatably fitted in 8a1 and has an opening through which at least the encoder lead wire 4 passes, and an axial direction of the substrate fixing portion 3 provided in the cylindrical portion 5b. And a suppressing portion 6 that suppresses the positional deviation of the encoder lead wire 4.
　基板固定部３の径方向中心を通る中心軸ＡＸが伸びる軸方向は、図１，２において符号Ｄ１で示される方向に等しい。カバー５の回転方向は、図１，２において符号Ｄ２で示される方向に等しい。 The axial direction in which the central axis AX passing through the center in the radial direction of the substrate fixing portion 3 extends is equal to the direction indicated by reference sign D1 in FIGS. The rotation direction of the cover 5 is equal to the direction indicated by reference sign D2 in FIGS.
　基板固定部３は、ねじ７を用いてブラケット８の円筒部８ａの軸方向の端部へ着脱可能に固定される。ブラケット８は、不図示のモータケースの軸方向端部を閉塞する部材である板状の板部８ｂと、板部８ｂの基板固定部３側の端面に設けられる円筒部８ａとにより構成される。円筒部８ａは、絶縁性の材料を用いて板部８ｂと一体形成で製造したものでもよい。絶縁性の材料は、例えば、ポリブチレンテレフタレート、ポリフェニレンサルファイド、液晶ポリマーなどである。絶縁性の樹脂を用いてダイカストによりブラケット８を製造することによって、複雑な形状のブラケット８を安価に製造することができる。ブラケット８の円筒部８ａの外径は、基板固定部３の外径よりも大きく、かつ、カバー５の円筒部５ｂの内径とほぼ等しい。また基板固定部３は、上記の絶縁性の材料を用いてブラケット８の円筒部８ａとは別に製造された後にブラケット８へ取り付けられるが、絶縁性の材料を用いてブラケット８の円筒部８ａと一体形成で製造したものでもよい。上記の絶縁性の樹脂を用いてダイカストにより基板固定部３を製造することによって、複雑な形状の基板固定部３を安価に製造することができる。なお本実施の形態では、基板固定部３がブラケット８の円筒部８ａと別体で製造された場合の構成例について説明するが、基板固定部３がブラケット８の円筒部８ａと一体成形で製造されている場合、一体成形で製造された基板固定部３及び円筒部８ａの全体を、基板固定部３とし、又はブラケット８としてもよい。 The substrate fixing portion 3 is detachably fixed to the end portion in the axial direction of the cylindrical portion 8a of the bracket 8 by using a screw 7. The bracket 8 includes a plate-like plate portion 8b that is a member that closes an axial end portion of a motor case (not shown), and a cylindrical portion 8a provided on an end surface of the plate portion 8b on the substrate fixing portion 3 side. . The cylindrical portion 8a may be manufactured integrally with the plate portion 8b using an insulating material. Examples of the insulating material include polybutylene terephthalate, polyphenylene sulfide, and a liquid crystal polymer. By manufacturing the bracket 8 by die casting using an insulating resin, the bracket 8 having a complicated shape can be manufactured at low cost. The outer diameter of the cylindrical portion 8 a of the bracket 8 is larger than the outer diameter of the substrate fixing portion 3 and is substantially equal to the inner diameter of the cylindrical portion 5 b of the cover 5. The board fixing portion 3 is manufactured separately from the cylindrical portion 8a of the bracket 8 using the above insulating material and then attached to the bracket 8. However, the insulating portion is used to attach the cylindrical portion 8a of the bracket 8 to the cylindrical portion 8a. It may be manufactured integrally. By manufacturing the substrate fixing part 3 by die casting using the insulating resin, the substrate fixing part 3 having a complicated shape can be manufactured at low cost. In the present embodiment, a configuration example in which the substrate fixing portion 3 is manufactured separately from the cylindrical portion 8a of the bracket 8 will be described. However, the substrate fixing portion 3 is manufactured by integral molding with the cylindrical portion 8a of the bracket 8. In this case, the entire board fixing part 3 and cylindrical part 8a manufactured by integral molding may be used as the board fixing part 3 or the bracket 8.
　基板固定部３には突起３ｃが形成される。突起３ｃは、基板固定部３の端部３ａから軸方向に伸びる突形状の部材である。突起３ｃは、基板固定部３の端部３ａと基板固定部３の外周部３ｂとが成す角部に形成される。基板固定部３の端部３ａは、基板固定部３のブラケット８側とは逆側の端部である。図１には、説明を簡単化するため、１つの突起３ｃのみ示されるが、突起３ｃは複数設けられているものとし、複数の突起３ｃは、回転方向に互いに離れて配列される。図２では突起３ｃの図示が省略される。突起３ｃは、基板１の径方向外側に形成される窪み１ｄに嵌め込まれる。窪み１ｄは、基板１の外周部１ｃから基板１の径方向中心に向かって突形状の凹部である。突起３ｃと窪み１ｄとの間には、不図示の接着剤が設けられる。接着剤が設けられることによって、接着剤が設けられていない場合に比べて、基板１の窪み１ｄと突起３ｃとの接触面積が増加し、基板１が基板固定部３へ強固に固定される。 A protrusion 3 c is formed on the substrate fixing portion 3. The protrusion 3 c is a protruding member extending in the axial direction from the end 3 a of the substrate fixing portion 3. The protrusion 3 c is formed at a corner formed by the end 3 a of the substrate fixing portion 3 and the outer peripheral portion 3 b of the substrate fixing portion 3. The end 3 a of the substrate fixing part 3 is an end opposite to the bracket 8 side of the substrate fixing part 3. In FIG. 1, only one protrusion 3c is shown to simplify the description, but it is assumed that a plurality of protrusions 3c are provided, and the plurality of protrusions 3c are arranged away from each other in the rotation direction. In FIG. 2, the illustration of the protrusion 3c is omitted. The protrusion 3 c is fitted into a recess 1 d formed on the outer side in the radial direction of the substrate 1. The recess 1 d is a concave portion having a protruding shape from the outer peripheral portion 1 c of the substrate 1 toward the radial center of the substrate 1. An adhesive (not shown) is provided between the protrusion 3c and the recess 1d. By providing the adhesive, the contact area between the recess 1d of the substrate 1 and the protrusion 3c is increased as compared with the case where the adhesive is not provided, and the substrate 1 is firmly fixed to the substrate fixing portion 3.
　なお、突起３ｃの軸方向の長さは、基板１を保持できる長さであればよいが、例えば突起３ｃの先端が第２基板面１ｂよりも突き出るように、基板１の軸方向の厚みに相当する寸法よりも長くしてもよい。これにより、カバー５が回転したときに、例えば突起３ｃの径方向外側に配線される不図示のモータリード線が基板１に近づいて、モータリード線からのノイズが基板１に設けられる電子部品２、位置検出部などに与える影響を抑制できる。従って、突起３ｃを長くすることにより、ロータの回転位置の検出精度の低下を抑制できる。モータリード線は、不図示のモータへ電力を供給する配線である。 The length of the projection 3c in the axial direction is not limited as long as the substrate 1 can be held. For example, the projection 1c has a thickness in the axial direction so that the tip of the projection 3c protrudes beyond the second substrate surface 1b. It may be longer than the corresponding dimension. As a result, when the cover 5 rotates, for example, a motor lead wire (not shown) wired outside in the radial direction of the protrusion 3c approaches the substrate 1, and noise from the motor lead wire 2 is provided on the substrate 1. The influence on the position detection unit can be suppressed. Therefore, a decrease in the detection accuracy of the rotational position of the rotor can be suppressed by lengthening the protrusion 3c. The motor lead wire is a wiring for supplying electric power to a motor (not shown).
　電子部品２は、例えば、位置検出部で検出されたロータの回転位置を示す信号を生成する信号生成回路、当該信号をエンコーダリード線４に出力する信号出力回路などを構成する部品でもよいし、エンコーダ１００－１の外部に設けられるサーボアンプから供給される電力を位置検出部などへ供給する電源回路を構成する部品でもよい。電子部品２は、例えばＩＣ（Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）、抵抗器、コイル、コンデンサなどである。電子部品２は１つでもよいし複数でもよい。図１及び図２では説明を簡単化するため、円筒状の構造体で電子部品２を模擬している。位置検出部は、不図示のロータの回転位置を検出する光学部品であり、例えば、基板固定部３の内側において、基板１の第１基板面１ａに設けられる。第１基板面１ａは、基板固定部３と向き合う基板１の端面である。 The electronic component 2 may be, for example, a component that forms a signal generation circuit that generates a signal indicating the rotational position of the rotor detected by the position detection unit, a signal output circuit that outputs the signal to the encoder lead wire 4, It may be a component constituting a power supply circuit that supplies power supplied from a servo amplifier provided outside the encoder 100-1 to a position detection unit or the like. The electronic component 2 is, for example, an IC (Integrated Circuit), a resistor, a coil, or a capacitor. There may be one electronic component 2 or a plurality of electronic components 2. In FIG. 1 and FIG. 2, the electronic component 2 is simulated by a cylindrical structure in order to simplify the description. The position detection unit is an optical component that detects the rotational position of a rotor (not shown). For example, the position detection unit is provided on the first substrate surface 1 a of the substrate 1 inside the substrate fixing unit 3. The first substrate surface 1 a is an end surface of the substrate 1 that faces the substrate fixing unit 3.
　基板１の第２基板面１ｂには、電子部品２以外にも第１コネクタ９が設けられる。第２基板面１ｂは、カバー５の底部５ａと向き合う基板１の端面である。第１コネクタ９は、基板１上のパターン配線を介して、電子部品２及び位置検出部と電気的に接続される。第１コネクタ９には第２コネクタ１０が接続される。第２コネクタ１０にはエンコーダリード線４の一端が接続される。第２コネクタ１０が第１コネクタ９に接続されることにより、エンコーダリード線４が、電子部品２及び位置検出部と電気的に接続される。第１コネクタ９及び第２コネクタ１０を用いることにより、エンコーダリード線４の基板１への接続が容易化される。なおエンコーダリード線４は、エンコーダリード線４が電子部品２と電気的に接続されればよく、第１コネクタ９及び第２コネクタ１０を用いずに、例えば基板１上の配線パターンに直接半田付けによって接続されてもよい。なお図１及び図２では、説明を簡単化するため１本のエンコーダリード線４が示されるが、エンコーダリード線４は、複数の信号線で構成される信号群である。 In addition to the electronic component 2, the first connector 9 is provided on the second substrate surface 1 b of the substrate 1. The second substrate surface 1 b is an end surface of the substrate 1 that faces the bottom 5 a of the cover 5. The first connector 9 is electrically connected to the electronic component 2 and the position detection unit via the pattern wiring on the substrate 1. A second connector 10 is connected to the first connector 9. One end of the encoder lead wire 4 is connected to the second connector 10. By connecting the second connector 10 to the first connector 9, the encoder lead wire 4 is electrically connected to the electronic component 2 and the position detection unit. By using the first connector 9 and the second connector 10, the connection of the encoder lead wire 4 to the substrate 1 is facilitated. Note that the encoder lead wire 4 only needs to be electrically connected to the electronic component 2 and is soldered directly to, for example, a wiring pattern on the substrate 1 without using the first connector 9 and the second connector 10. May be connected by. In FIG. 1 and FIG. 2, one encoder lead wire 4 is shown to simplify the description, but the encoder lead wire 4 is a signal group composed of a plurality of signal lines.
　エンコーダリード線４の他端には第３コネクタ１１が接続される。第３コネクタ１１は中継コネクタ１２に接続される。中継コネクタ１２は、エンコーダリード線４と不図示のモータリード線とを、エンコーダ１００－１の外部に設けられるサーボアンプへ接続するためのコネクタである。中継コネクタ１２には、サーボアンプから伸びるケーブル１３が接続される。中継コネクタ１２は、カバー５の円筒部５ｂに形成される開口部１４を閉塞するように、カバー５の円筒部５ｂの外周部５ｄに固定される。開口部１４の詳細は後述する。なお、中継コネクタ１２には、第２コネクタ１０以外にも、モータリード線に接続される。 The third connector 11 is connected to the other end of the encoder lead wire 4. The third connector 11 is connected to the relay connector 12. The relay connector 12 is a connector for connecting the encoder lead wire 4 and a motor lead wire (not shown) to a servo amplifier provided outside the encoder 100-1. A cable 13 extending from the servo amplifier is connected to the relay connector 12. The relay connector 12 is fixed to the outer peripheral portion 5d of the cylindrical portion 5b of the cover 5 so as to close the opening 14 formed in the cylindrical portion 5b of the cover 5. Details of the opening 14 will be described later. In addition to the second connector 10, the relay connector 12 is connected to a motor lead wire.
　カバー５は、エンコーダ１００－１内部への塵埃、金属片などの浸入による絶縁性能の低下を抑制するための部品である。カバー５は、前述した絶縁性の材料を用いてダイカスト成形で筒状に形成したものでもよいし、銅合金、鋳鉄、鋼、鉄合金などの金属を用いてダイカスト成形で筒状に形成したものでもよい。金属でカバー５を製造することにより、カバー５の内側に存在する電子回路がカバー５の外部の磁界から保護される。 The cover 5 is a component for suppressing a decrease in insulation performance due to intrusion of dust, metal pieces, etc. into the encoder 100-1. The cover 5 may be a cylinder formed by die casting using the insulating material described above, or a cylinder formed by die casting using a metal such as copper alloy, cast iron, steel, or iron alloy. But you can. By manufacturing the cover 5 with metal, an electronic circuit existing inside the cover 5 is protected from a magnetic field outside the cover 5.
　カバー５の円筒部５ｂの内周面５ｂ１と、ブラケット８の円筒部８ａの外周部８ａ１との間には、例えば不図示のＯリングが設けられる。ブラケット８の円筒部８ａにカバー５が嵌め込まれたとき、Ｏリングによって、ブラケット８の円筒部８ａとカバー５との間の隙間が塞がれるため、カバー５の内部に塵埃、金属片などが浸入することを抑制できる。また図２に示すようにカバー５の開口端５ｃ側には、カバー５の円筒部５ｂの外周部５ｄから径方向外側に伸びる鍔部５ｅが形成される。鍔部５ｅからブラケット８の板部８ｂに向けてねじ７がねじ込まれることによって、カバー５がブラケット８へ固定される。 Between the inner peripheral surface 5b1 of the cylindrical portion 5b of the cover 5 and the outer peripheral portion 8a1 of the cylindrical portion 8a of the bracket 8, for example, an O-ring (not shown) is provided. When the cover 5 is fitted into the cylindrical portion 8a of the bracket 8, the O-ring closes the gap between the cylindrical portion 8a of the bracket 8 and the cover 5, so that dust, metal pieces, etc. Infiltration can be suppressed. Further, as shown in FIG. 2, a flange 5 e that extends radially outward from the outer peripheral portion 5 d of the cylindrical portion 5 b of the cover 5 is formed on the opening end 5 c side of the cover 5. The cover 5 is fixed to the bracket 8 by screwing the screw 7 from the flange portion 5 e toward the plate portion 8 b of the bracket 8.
　カバー５の円筒部５ｂには開口部１４が形成され、開口部１４には抑制部６が設けられる。抑制部６は、カバー５の回転時におけるエンコーダリード線４の軸方向への位置ずれを抑制するための部材である。抑制部６は、カバー５と一体成形で製造されたものでもよいし、カバー５とは別に製造されたものでもよい。カバー５とは別に製造された抑制部６が用いられる場合、開口部１４を形作る壁面１５に、抑制部６が接着などで固定される。 An opening 14 is formed in the cylindrical portion 5 b of the cover 5, and the suppressing portion 6 is provided in the opening 14. The suppression unit 6 is a member for suppressing the positional deviation of the encoder lead wire 4 in the axial direction when the cover 5 is rotated. The suppression unit 6 may be manufactured integrally with the cover 5 or may be manufactured separately from the cover 5. When the restraining part 6 manufactured separately from the cover 5 is used, the restraining part 6 is fixed to the wall surface 15 forming the opening 14 by bonding or the like.
　抑制部６は、開口部１４を形作る壁面１５の内、カバー５の回転方向における第１壁面１５１から、第１壁面１５１と向き合う第２壁面１５２に向かって伸びる。すなわち、抑制部６は、開口部１４の縁からカバー５の回転方向に沿った向きに伸びる。第１壁面１５１に抑制部６が設けられることにより、開口部１４を形作る壁面１５の内、カバー５の底部５ａ側に位置する第３壁面１５３と、第３壁面１５３と向き合う抑制部６の第１端面６１との間には、窪み形状の第１空間１６が形成される。第１空間１６の軸方向の幅は、エンコーダリード線４の線径よりも広い。なおエンコーダリード線４は、前述したように、複数の信号線で構成されるため、エンコーダリード線４の線径は、複数の信号線を束ねた信号線群の太さとしてもよい。 The suppressing portion 6 extends from the first wall surface 151 in the rotation direction of the cover 5 to the second wall surface 152 facing the first wall surface 151 among the wall surfaces 15 forming the opening 14. In other words, the suppressing unit 6 extends from the edge of the opening 14 in a direction along the rotation direction of the cover 5. By providing the suppressing portion 6 on the first wall surface 151, the third wall surface 153 located on the bottom 5 a side of the cover 5 among the wall surfaces 15 that form the opening 14, and the third suppressing wall 6 facing the third wall surface 153. A recessed first space 16 is formed between the first end surface 61. The axial width of the first space 16 is wider than the wire diameter of the encoder lead wire 4. Since the encoder lead wire 4 is composed of a plurality of signal lines as described above, the wire diameter of the encoder lead wire 4 may be the thickness of a signal line group obtained by bundling a plurality of signal lines.
　また第１壁面１５１に抑制部６が設けられることにより、開口部１４を形作る壁面１５の内、カバー５の開口端５ｃ側に位置する第４壁面１５４と、第４壁面１５４と向き合う抑制部６の第２端面６２との間には、不図示のモータリード線が通る第２空間１７が形成される。 Further, by providing the first wall surface 151 with the suppressing portion 6, the fourth wall surface 154 located on the opening end 5 c side of the cover 5 among the wall surfaces 15 forming the opening 14, and the suppressing portion 6 facing the fourth wall surface 154. A second space 17 through which a motor lead wire (not shown) passes is formed between the second end face 62 and the second end face 62.
　エンコーダ１００－１を組み立てる場合、まず、基板固定部３に基板１が設置され、その後、第１コネクタ９が第２コネクタ１０に接続される。第１コネクタ９が第２コネクタ１０に接続された後、エンコーダリード線４に設けられる第３コネクタ１１は、カバー５の円筒部５ｂの内側から、開口部１４を介して、カバー５の円筒部５ｂの外側へ引き出される。第３コネクタ１１がカバー５の円筒部５ｂの外側へ引き出された後、第３コネクタ１１に中継コネクタ１２が接続される。 When assembling the encoder 100-1, the board 1 is first installed on the board fixing part 3, and then the first connector 9 is connected to the second connector 10. After the first connector 9 is connected to the second connector 10, the third connector 11 provided on the encoder lead wire 4 is connected to the cylindrical portion of the cover 5 from the inside of the cylindrical portion 5 b of the cover 5 through the opening 14. It is pulled out of 5b. After the third connector 11 is pulled out to the outside of the cylindrical portion 5 b of the cover 5, the relay connector 12 is connected to the third connector 11.
　このように、第３コネクタ１１の中継コネクタ１２への接続作業性を考慮して、エンコーダリード線４には、余長を持たせる必要がある。但し、エンコーダリード線４に余長を持たせた場合、カバー５の円筒部５ｂがブラケット８の円筒部８ａに嵌め込まれる際、エンコーダリード線４の余長部分が、カバー５の底部５ａと電子部品２との間の隙間に挟まる可能性がある。実施の形態１に係るエンコーダ１００－１は、カバー５が回転可能にブラケット８の円筒部８ａに嵌め込まれる構造を有するため、カバー５の円筒部５ｂがブラケット８の円筒部８ａに嵌め込まれたときに、カバー５の底部５ａと電子部品２との間にエンコーダリード線４の余長部分が挟まった場合でも、カバー５の円筒部５ｂがブラケット８の板部８ｂに向かって押し付けられた状態で、カバー５を回転させることによって、カバー５内の空間の内、カバー５の底部５ａと電子部品２との間の隙間以外の領域、すなわち電子部品２とカバー５の円筒部５ｂとが向き合う領域に、エンコーダリード線４の余長部分を移動させることができる。 Thus, in consideration of the workability of connecting the third connector 11 to the relay connector 12, the encoder lead wire 4 needs to have a surplus length. However, when the encoder lead wire 4 has an extra length, when the cylindrical portion 5b of the cover 5 is fitted into the cylindrical portion 8a of the bracket 8, the extra length portion of the encoder lead wire 4 is connected to the bottom portion 5a of the cover 5 and the electronic part. There is a possibility of being caught in a gap between the component 2. The encoder 100-1 according to the first embodiment has a structure in which the cover 5 is rotatably fitted into the cylindrical portion 8a of the bracket 8, so that the cylindrical portion 5b of the cover 5 is fitted into the cylindrical portion 8a of the bracket 8. Even when the extra length portion of the encoder lead wire 4 is sandwiched between the bottom portion 5 a of the cover 5 and the electronic component 2, the cylindrical portion 5 b of the cover 5 is pressed against the plate portion 8 b of the bracket 8. By rotating the cover 5, an area other than the gap between the bottom part 5 a of the cover 5 and the electronic part 2 in the space in the cover 5, that is, an area where the electronic part 2 and the cylindrical part 5 b of the cover 5 face each other. In addition, the extra length of the encoder lead wire 4 can be moved.
　次にエンコーダ１００－１の組立時にエンコーダリード線４の余長部分が移動する様子について説明する。図３は図１に示すエンコーダリード線の余長部分が移動する状態を示す第１図である。図４は図１に示すエンコーダリード線の余長部分が移動する状態を示す第２図である。図５は図１に示すエンコーダリード線の余長部分が移動する状態を示す第３図である。図６は図１に示すエンコーダリード線の余長部分が移動する状態を示す第４図である。 Next, how the extra length portion of the encoder lead wire 4 moves when the encoder 100-1 is assembled will be described. FIG. 3 is a first view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves. FIG. 4 is a second view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves. FIG. 5 is a third view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves. FIG. 6 is a fourth view showing a state in which the extra length portion of the encoder lead wire shown in FIG. 1 moves.
　図３には、エンコーダリード線４の余長部分４Ａが、カバー５の底部５ａと電子部品２との間の隙間ＣＬ１に挟まった状態が示されている。余長部分４Ａは、例えば、エンコーダリード線４の一端から他端までの範囲の内、中間部分である。 FIG. 3 shows a state where the extra length portion 4A of the encoder lead wire 4 is sandwiched in the gap CL1 between the bottom 5a of the cover 5 and the electronic component 2. The extra length portion 4A is, for example, an intermediate portion in a range from one end of the encoder lead wire 4 to the other end.
　図４には、中継コネクタ１２が固定されたカバー５の円筒部５ｂが、ブラケット８の板部８ｂに向かって押し付けられた状態で、時計回りに回転されたときのエンコーダリード線４の状態が示される。カバー５の円筒部５ｂの回転に伴い、エンコーダリード線４の余長部分４Ａは、図１に示すカバー５の底部５ａに擦れることによって、カバー５の底部５ａと電子部品２との間の隙間ＣＬ１から、電子部品２とカバー５の円筒部５ｂとが向き合う領域１８に向かって移動する。 4 shows the state of the encoder lead 4 when the cylindrical portion 5b of the cover 5 to which the relay connector 12 is fixed is pressed toward the plate portion 8b of the bracket 8 and rotated clockwise. Indicated. Along with the rotation of the cylindrical portion 5b of the cover 5, the extra length portion 4A of the encoder lead wire 4 is rubbed against the bottom portion 5a of the cover 5 shown in FIG. 1, so that a gap between the bottom portion 5a of the cover 5 and the electronic component 2 is obtained. From CL1, it moves toward the area | region 18 where the electronic component 2 and the cylindrical part 5b of the cover 5 face.
　図４に示す状態から、さらにカバー５が時計回りに回転されると、図５に示すように、エンコーダリード線４の余長部分４Ａは、カバー５の底部５ａと電子部品２との間の隙間ＣＬ１から、電子部品２とカバー５の円筒部５ｂとが向き合う領域１８に押し出される。 When the cover 5 is further rotated clockwise from the state shown in FIG. 4, as shown in FIG. 5, the extra length portion 4 </ b> A of the encoder lead wire 4 is between the bottom 5 a of the cover 5 and the electronic component 2. The electronic component 2 and the cylindrical portion 5b of the cover 5 are pushed out from the gap CL1 into a region 18 facing each other.
　図５に示す状態から、カバー５が反時計回りに回転されると、図６に示すように、エンコーダリード線４の余長部分４Ａは、引き伸ばされて、電子部品２とカバー５の円筒部５ｂとが向き合う領域１８に配線される。 When the cover 5 is rotated counterclockwise from the state shown in FIG. 5, as shown in FIG. 6, the extra length portion 4 </ b> A of the encoder lead wire 4 is stretched, and the cylindrical part of the electronic component 2 and the cover 5 is stretched. Wiring is performed in a region 18 facing 5b.
　このように実施の形態１に係るエンコーダ１００－１は、カバー５が回転可能にブラケット８の円筒部８ａに嵌め込まれる構造を有するため、カバー５の底部５ａと電子部品２との間に、エンコーダリード線４の余長部分４Ａが挟まった場合でも、カバー５を回転させることによって、電子部品２とカバー５の円筒部５ｂとが向き合う領域１８に、エンコーダリード線４の余長部分４Ａを移動させることができる。従って、第３コネクタ１１の接続作業性を考慮して、エンコーダリード線４に余長を持たせている場合でも、カバー５の底部５ａと電子部品２との間に挟まるエンコーダリード線４の線径分、カバー５の筒状部の軸方向長を長くする必要がない。その結果、エンコーダ１００－１の軸方向の長さを、エンコーダリード線４の線径分、短くすることができる。なお、図３では、隙間ＣＬにエンコーダリード線４が挟まっているが、例えば、エンコーダリード線４をカバー５の開口部１４に通した後に、カバー５の開口部１４の近くに第２コネクタ１０が配置されるようにしながら、カバー５をブラケット８の円筒部８ａに嵌め込んだ場合には、第２コネクタ１０と開口部１４とを結ぶ線上に、電子部品２が配置されなくなる。そのため、このようにカバー５が嵌め込まれた場合、隙間ＣＬにエンコーダリード線４が挟まることを防止でき、さらに、カバー５を回転させることでエンコーダリード線４の余長部分４Ａを領域１８に這わせることができる。 As described above, the encoder 100-1 according to the first embodiment has a structure in which the cover 5 is rotatably fitted in the cylindrical portion 8a of the bracket 8, so that the encoder 100-1 is interposed between the bottom portion 5a of the cover 5 and the electronic component 2. Even when the extra length portion 4A of the lead wire 4 is sandwiched, the extra length portion 4A of the encoder lead wire 4 is moved to the region 18 where the electronic component 2 and the cylindrical portion 5b of the cover 5 face each other by rotating the cover 5. Can be made. Therefore, in consideration of the connection workability of the third connector 11, even when the encoder lead wire 4 has an extra length, the wire of the encoder lead wire 4 sandwiched between the bottom portion 5 a of the cover 5 and the electronic component 2. There is no need to increase the axial length of the cylindrical portion of the cover 5 by the diameter. As a result, the axial length of the encoder 100-1 can be shortened by the wire diameter of the encoder lead wire 4. In FIG. 3, the encoder lead wire 4 is sandwiched in the gap CL. For example, after passing the encoder lead wire 4 through the opening 14 of the cover 5, the second connector 10 is located near the opening 14 of the cover 5. When the cover 5 is fitted into the cylindrical portion 8a of the bracket 8 while the electronic component 2 is disposed, the electronic component 2 is not disposed on the line connecting the second connector 10 and the opening 14. Therefore, when the cover 5 is fitted in this way, the encoder lead wire 4 can be prevented from being caught in the gap CL, and the extra length portion 4A of the encoder lead wire 4 is moved to the region 18 by rotating the cover 5. Can be made.
　また、実施の形態１に係るエンコーダ１００－１では、開口部１４に抑制部６が設けられている。そのため、カバー５の回転中に、エンコーダリード線４が軸方向に移動して、例えば図１に示す隙間ＣＬにエンコーダリード線４が挟まることを抑制できる。従って、カバー５の回転が滑らかになり、エンコーダ１００－１の組立作業性が向上する。なお抑制部６の位置は、エンコーダリード線４が軸方向に移動を抑制できる位置であればよく、例えば図２に示す抑制部６の第１端面６１の軸方向における位置が、図１に示す基板１の第２基板面１ｂの軸方向における位置よりもブラケット８側でもよい。隙間ＣＬは、円筒部５ｂの内周面５ｂ１と向き合う基板１の外周部１ｃの内、少なくとも一部の領域と、当該領域に向き合う円筒部５ｂの内周面５ｂ１との間の径方向幅に等しい。 Further, in the encoder 100-1 according to the first embodiment, the suppressing portion 6 is provided in the opening portion. Therefore, it is possible to suppress the encoder lead wire 4 from moving in the axial direction during the rotation of the cover 5 and being caught in the gap CL shown in FIG. 1, for example. Therefore, the rotation of the cover 5 becomes smooth, and the assembly workability of the encoder 100-1 is improved. The position of the suppressing portion 6 may be a position where the encoder lead wire 4 can suppress movement in the axial direction. For example, the position of the first end surface 61 of the suppressing portion 6 shown in FIG. 2 in the axial direction is shown in FIG. It may be closer to the bracket 8 than the position of the second substrate surface 1b of the substrate 1 in the axial direction. The gap CL has a radial width between at least a part of the outer peripheral portion 1c of the substrate 1 facing the inner peripheral surface 5b1 of the cylindrical portion 5b and the inner peripheral surface 5b1 of the cylindrical portion 5b facing the region. equal.
　また、実施の形態１に係るエンコーダ１００－１は、隙間ＣＬが、エンコーダリード線４の線径よりも小さくなるように構成してもよい。これにより、隙間ＣＬがエンコーダリード線４の線径よりも大きい場合に比べて、カバー５の円筒部５ｂの直径を小さくすることができ、エンコーダ１００－１の径方向の寸法が小さくなる。 Also, the encoder 100-1 according to the first embodiment may be configured such that the gap CL is smaller than the wire diameter of the encoder lead wire 4. As a result, the diameter of the cylindrical portion 5b of the cover 5 can be made smaller than when the gap CL is larger than the wire diameter of the encoder lead wire 4, and the radial dimension of the encoder 100-1 is made smaller.
　また、隙間ＣＬが、エンコーダリード線４の線径よりも小さくなるように構成されることによって、エンコーダリード線４の余長部分４Ａが、隙間ＣＬから基板固定部３側に移動することを抑制できる。そのため、基板固定部３の近くに配線される不図示のモータリード線からエンコーダリード線４までの距離が短くなることを抑制できる。従って、モータリード線からのノイズがエンコーダリード線４に重畳され難くなり、ロータの回転位置の検出精度の低下を抑制できる。 Further, since the gap CL is configured to be smaller than the wire diameter of the encoder lead wire 4, it is possible to prevent the extra length portion 4A of the encoder lead wire 4 from moving from the gap CL to the substrate fixing portion 3 side. it can. Therefore, it is possible to prevent the distance from the motor lead wire (not shown) wired near the board fixing portion 3 to the encoder lead wire 4 from being shortened. Therefore, it is difficult for noise from the motor lead wire to be superimposed on the encoder lead wire 4, and a decrease in detection accuracy of the rotational position of the rotor can be suppressed.
　なおカバー５は以下のように構成してもよい。図７は実施の形態１の第１変形例に係るエンコーダに設けられるカバーの側面図である。図７に示されるカバー５には、図２に示される抑制部６の代わりに抑制部６Ａが設けられる。図７に示されるカバー５は、軸方向における抑制部６Ａの底部５ａ側の第１端面６１から底部５ａまでの幅Ｗ１が、軸方向における基板１の第２基板面１ｂから底部５ａまでの幅Ｗ２よりも狭くなるように構成されている。このように構成されるカバー５を用いることにより、カバー５の回転中に、エンコーダリード線４が図１に示す隙間ＣＬに挟まることを抑制できる。さらに、例えば図１に示す突起３ｃの先端が第２基板面１ｂよりも突き出でいる場合において、図１に示す突起３ｃの先端からカバー５の底部５ａまでの幅をＷと仮定したとき、ＷとＷ１とがＷ＞Ｗ１の関係を満たすように、抑制部６Ａ及び突起３ｃが構成されていれば、エンコーダリード線４が図１に示す突起３ｃに引っ掛かることを防止できる。従って、例えば抑制部６Ａの第１端面６１の軸方向における位置が、基板１の第２基板面１ｂの軸方向における位置よりもブラケット８側にある場合に比べて、カバー５の回転が滑らかになり、エンコーダ１００－１の組立作業性が向上する。 The cover 5 may be configured as follows. FIG. 7 is a side view of a cover provided in the encoder according to the first modification of the first embodiment. The cover 5 shown in FIG. 7 is provided with a suppressing portion 6A instead of the suppressing portion 6 shown in FIG. The cover 5 shown in FIG. 7 has a width W1 from the first end surface 61 on the bottom 5a side of the suppressing portion 6A to the bottom 5a in the axial direction, and a width from the second substrate surface 1b to the bottom 5a of the substrate 1 in the axial direction. It is configured to be narrower than W2. By using the cover 5 configured as described above, the encoder lead wire 4 can be prevented from being caught in the gap CL shown in FIG. 1 while the cover 5 is rotating. Further, for example, when the tip of the protrusion 3c shown in FIG. 1 protrudes from the second substrate surface 1b, assuming that the width from the tip of the protrusion 3c shown in FIG. 1 to the bottom 5a of the cover 5 is W, W If the suppressing portion 6A and the protrusion 3c are configured so that W> W1 satisfies the relationship of W> W1, the encoder lead wire 4 can be prevented from being caught by the protrusion 3c shown in FIG. Therefore, for example, the rotation of the cover 5 is smoother than in the case where the position of the first end surface 61 of the suppressing portion 6A in the axial direction of the second substrate surface 1b of the substrate 1 is closer to the bracket 8 side. Thus, the assembling workability of the encoder 100-1 is improved.
　図８は実施の形態１の第２変形例に係るエンコーダに設けられるカバーの側面図である。図８に示されるカバー５には、図７の抑制部６Ａが設けられ、さらに第１突起６３が設けられている。第１突起６３は、エンコーダリード線４の回転方向への位置ずれを抑制するため、抑制部６Ａの第１端面６１から軸方向に伸びる突形状の部材である。第１突起６３は、抑制部６Ａと一体形成で製造したものでもよいし、抑制部６Ａとは別に製作された後に抑制部６Ａへ取り付けられたものでもよい。第１突起６３は、エンコーダリード線４の回転方向への位置ずれを抑制できればよく、第１突起６３の形状は図示例の形状に限定されない。 FIG. 8 is a side view of a cover provided in the encoder according to the second modification of the first embodiment. The cover 5 shown in FIG. 8 is provided with the suppressing portion 6 </ b> A shown in FIG. 7, and further provided with a first protrusion 63. The first protrusion 63 is a protruding member that extends in the axial direction from the first end surface 61 of the suppressing portion 6 </ b> A in order to suppress the displacement of the encoder lead wire 4 in the rotational direction. The first protrusion 63 may be manufactured integrally with the suppressing portion 6A, or may be manufactured separately from the suppressing portion 6A and then attached to the suppressing portion 6A. The first protrusion 63 only needs to be able to suppress displacement of the encoder lead wire 4 in the rotational direction, and the shape of the first protrusion 63 is not limited to the shape shown in the example of the drawing.
実施の形態２．
　図９は本発明の実施の形態２に係るエンコーダの斜視図である。実施の形態２に係るエンコーダ１００－２には、基板固定部３の代わりに基板固定部３Ａが用いられる。基板固定部３Ａは、ブラケット８の円筒部８ａに固定される。ブラケット８の円筒部８ａには、ブラケット８の内部とカバー５の内側の空間とを連通させる貫通孔３１が形成される。また基板固定部３Ａには凹部３２が形成される。凹部３２は、基板固定部３Ａの外周部３ｂ全体の内、一部の領域が径方向内側に窪む形状の空間である。凹部３２は、基板固定部３Ａの回転方向に伸び、モータリード線１９が通る配線路として機能する。円筒部８ａの貫通孔３１にモータリード線１９が通される。モータリード線１９の一端には不図示のモータに接続され、モータリード線１９の他端には第４コネクタ２０が接続される。第４コネクタ２０は図１に示す中継コネクタ１２に接続される。なお図９では図示省略されているが、基板固定部３Ａには、図１に示す突起３ｃと同様の突起が設けられているものとする。 Embodiment 2. FIG.
FIG. 9 is a perspective view of an encoder according to Embodiment 2 of the present invention. In the encoder 100-2 according to the second embodiment, the substrate fixing unit 3A is used instead of the substrate fixing unit 3. The substrate fixing portion 3A is fixed to the cylindrical portion 8a of the bracket 8. A through-hole 31 is formed in the cylindrical portion 8 a of the bracket 8 so that the inside of the bracket 8 communicates with the space inside the cover 5. A concave portion 32 is formed in the substrate fixing portion 3A. The concave portion 32 is a space having a shape in which a part of the entire outer peripheral portion 3b of the substrate fixing portion 3A is recessed radially inward. The recess 32 extends in the rotation direction of the substrate fixing portion 3A and functions as a wiring path through which the motor lead wire 19 passes. The motor lead wire 19 is passed through the through hole 31 of the cylindrical portion 8a. One end of the motor lead wire 19 is connected to a motor (not shown), and the other end of the motor lead wire 19 is connected to the fourth connector 20. The fourth connector 20 is connected to the relay connector 12 shown in FIG. Although not shown in FIG. 9, it is assumed that the substrate fixing portion 3A is provided with a protrusion similar to the protrusion 3c shown in FIG.
　実施の形態２に係るエンコーダ１００－２を組み立てる場合、まず基板固定部３Ａに基板１が設置され、その後、第１コネクタ９が第２コネクタ１０に接続される。さらにモータリード線１９の一端が、円筒部８ａの貫通孔３１に挿入される。第３コネクタ１１及び第４コネクタ２０は、カバー５の円筒部５ｂの内側から、開口部１４を介して、カバー５の円筒部５ｂの外側へ引き出される。このとき、モータリード線１９は、基板固定部３Ａの凹部３２に配線され、さらに、抑制部６の第２端面６２側と向き合う位置に配線される。第３コネクタ１１及び第４コネクタ２０がカバー５の円筒部５ｂの外側へ引き出された後、第３コネクタ１１及び第４コネクタ２０に中継コネクタ１２が接続される。その後、カバー５の円筒部５ｂが円筒部８ａに嵌め込まれる。モータリード線１９は、基板固定部３Ａの凹部３２に配線されるため、カバー５の円筒部５ｂがモータリード線１９に干渉することはない。その後カバー５を回転させ、最後に中継コネクタ１２をカバー５の円筒部５ｂに固定する。 When assembling the encoder 100-2 according to the second embodiment, the substrate 1 is first installed on the substrate fixing portion 3A, and then the first connector 9 is connected to the second connector 10. Furthermore, one end of the motor lead wire 19 is inserted into the through hole 31 of the cylindrical portion 8a. The third connector 11 and the fourth connector 20 are drawn from the inside of the cylindrical portion 5 b of the cover 5 to the outside of the cylindrical portion 5 b of the cover 5 through the opening 14. At this time, the motor lead wire 19 is wired in the concave portion 32 of the substrate fixing portion 3 </ b> A, and further wired at a position facing the second end face 62 side of the suppressing portion 6. After the third connector 11 and the fourth connector 20 are pulled out to the outside of the cylindrical portion 5 b of the cover 5, the relay connector 12 is connected to the third connector 11 and the fourth connector 20. Thereafter, the cylindrical portion 5b of the cover 5 is fitted into the cylindrical portion 8a. Since the motor lead wire 19 is wired in the concave portion 32 of the substrate fixing portion 3A, the cylindrical portion 5b of the cover 5 does not interfere with the motor lead wire 19. Thereafter, the cover 5 is rotated, and finally the relay connector 12 is fixed to the cylindrical portion 5 b of the cover 5.
　実施の形態２に係るエンコーダ１００－２は、実施の形態１に係るエンコーダ１００－１と同様に、カバー５が回転可能に基板固定部３Ａに嵌め込まれる構造を有するため、カバー５の底部５ａと電子部品２との間に、エンコーダリード線４の余長部分４Ａが挟まった場合でも、カバー５を回転させることによって、電子部品２とカバー５の円筒部５ｂとが向き合う領域１８に、エンコーダリード線４の余長部分４Ａを移動させることができる。 The encoder 100-2 according to the second embodiment has a structure in which the cover 5 is rotatably fitted in the board fixing portion 3A, like the encoder 100-1 according to the first embodiment. Even when the extra length portion 4A of the encoder lead wire 4 is sandwiched between the electronic component 2, the encoder lead is placed in a region 18 where the electronic component 2 and the cylindrical portion 5b of the cover 5 face each other by rotating the cover 5. The extra length portion 4A of the line 4 can be moved.
　また、実施の形態２に係るエンコーダ１００－２では、モータリード線１９が抑制部６の第２端面６２側と向き合う位置に配線されるため、カバー５の回転中に、モータリード線１９が軸方向に移動することを抑制できる。従って、モータリード線１９が軸方向に移動して図９に示す隙間ＣＬに挟まることを抑制できる。その結果、カバー５の回転が滑らかになり、エンコーダ１００－２の組立作業性が向上する。 In the encoder 100-2 according to the second embodiment, since the motor lead wire 19 is wired at a position facing the second end face 62 side of the suppressing portion 6, the motor lead wire 19 is pivoted while the cover 5 is rotating. The movement in the direction can be suppressed. Therefore, the motor lead wire 19 can be prevented from moving in the axial direction and being caught in the gap CL shown in FIG. As a result, the rotation of the cover 5 becomes smooth, and the assembly workability of the encoder 100-2 is improved.
　また実施の形態２に係るエンコーダ１００－２によれば、エンコーダリード線４とモータリード線１９とを軸方向に離しながら、カバー５の回転時におけるエンコーダリード線４及びモータリード線１９のそれぞれの軸方向への位置ずれを抑制することができる。そのため、エンコーダリード線４及びモータリード線１９の双方が、例えば抑制部６の第１端面６１側に通されている場合に比べて、モータリード線１９からエンコーダリード線４までの距離が長くなり、モータリード線１９からのノイズがエンコーダリード線４に伝わり難くなる。従って、モータリード線１９からのノイズによってロータの回転位置の検出精度が低下することを防ぐことができる。 Further, according to the encoder 100-2 according to the second embodiment, the encoder lead wire 4 and the motor lead wire 19 are rotated while the cover 5 is rotated while the encoder lead wire 4 and the motor lead wire 19 are separated in the axial direction. Positional displacement in the axial direction can be suppressed. Therefore, the distance from the motor lead wire 19 to the encoder lead wire 4 becomes longer than when both the encoder lead wire 4 and the motor lead wire 19 are passed through, for example, the first end face 61 side of the suppressing portion 6. The noise from the motor lead wire 19 is not easily transmitted to the encoder lead wire 4. Therefore, it is possible to prevent the detection accuracy of the rotational position of the rotor from being lowered due to noise from the motor lead wire 19.
　なお実施の形態２に係るエンコーダ１００－２のカバー５は以下のように構成してもよい。図１０は実施の形態２の第１変形例に係るエンコーダに設けられるカバーの側面図である。図１０に示されるカバー５には、図９に示される抑制部６の代わりに抑制部６Ｂが設けられる。図１０に示されるカバー５は、軸方向における抑制部６Ｂの第２端面６２からカバー５の開口端５ｃまでの幅Ｗ３が、軸方向における基板１の第１基板面１ａからカバー５の開口端５ｃまでの幅Ｗ４よりも狭くなるように構成されている。このように構成されるカバー５を用いることにより、カバー５の回転中に、モータリード線１９が図９に示す隙間ＣＬに挟まることを抑制できる。従って、例えば抑制部６Ｂの第２端面６２の軸方向における位置が、基板１の第１基板面１ａの軸方向における位置よりもカバー５の底部５ａ側にある場合に比べて、カバー５の回転が滑らかになり、エンコーダ１００－２の組立作業性が向上する。 The cover 5 of the encoder 100-2 according to the second embodiment may be configured as follows. FIG. 10 is a side view of a cover provided in the encoder according to the first modification of the second embodiment. The cover 5 shown in FIG. 10 is provided with a suppressing part 6B instead of the suppressing part 6 shown in FIG. The cover 5 shown in FIG. 10 has a width W3 from the second end surface 62 of the restraining portion 6B in the axial direction to the opening end 5c of the cover 5 such that the opening end of the cover 5 from the first substrate surface 1a of the substrate 1 in the axial direction. It is configured to be narrower than the width W4 up to 5c. By using the cover 5 configured as described above, the motor lead wire 19 can be prevented from being caught in the gap CL shown in FIG. 9 while the cover 5 is rotating. Therefore, for example, the rotation of the cover 5 is compared with the case where the position in the axial direction of the second end surface 62 of the suppressing portion 6B is closer to the bottom 5a side of the cover 5 than the position in the axial direction of the first substrate surface 1a of the substrate 1. As a result, the assembling workability of the encoder 100-2 is improved.
　また、図１０に示すカバー５を用いることにより、例えば抑制部６Ｂの第２端面６２の軸方向における位置が、基板１の第１基板面１ａの軸方向における位置よりもカバー５の底部５ａ側にある場合に比べて、モータリード線１９から基板１までの軸方向における距離を広げることができる。従って、開口部１４を通るモータリード線１９とエンコーダリード線４との軸方向の距離が広がり、モータリード線１９からのノイズがエンコーダリード線４に伝わり難くなる。その結果、モータリード線１９からのノイズによってロータの回転位置の検出精度が低下することを防ぐことができる。 Further, by using the cover 5 shown in FIG. 10, for example, the position in the axial direction of the second end surface 62 of the suppressing portion 6 </ b> B is closer to the bottom 5 a side of the cover 5 than the position in the axial direction of the first substrate surface 1 a of the substrate 1. Compared with the case where it exists, the distance in the axial direction from the motor lead wire 19 to the board | substrate 1 can be extended. Accordingly, the axial distance between the motor lead wire 19 and the encoder lead wire 4 passing through the opening 14 is widened, and noise from the motor lead wire 19 is not easily transmitted to the encoder lead wire 4. As a result, it is possible to prevent the detection accuracy of the rotational position of the rotor from being lowered due to noise from the motor lead wire 19.
　なお、図１０に示すカバー５は、図７に示されるカバー５と同様に、幅Ｗ１が幅Ｗ２よりも狭くなるように構成してもよい。このように構成することにより、図７に示すカバー５と同様の効果が得られる。 Note that the cover 5 shown in FIG. 10 may be configured such that the width W1 is narrower than the width W2, similarly to the cover 5 shown in FIG. By comprising in this way, the effect similar to the cover 5 shown in FIG. 7 is acquired.
　図１１は実施の形態２の第２変形例に係るエンコーダに設けられるカバーの側面図である。図１１に示されるカバー５には、図１０の抑制部６Ｂが設けられ、さらに第１突起６３及び第２突起６４が設けられている。第２突起６４は、モータリード線１９の回転方向への位置ずれを抑制するため、抑制部６Ｂの第２端面６２から軸方向に伸びる突形状の部材である。第２突起６４は、抑制部６Ｂと一体形成で製造したものでもよいし、抑制部６Ｂとは別に製作された後に抑制部６Ｂへ取り付けられたものでもよい。第２突起６４は、モータリード線１９の回転方向への位置ずれを抑制できればよく、その形状は図示例の形状に限定されない。 FIG. 11 is a side view of a cover provided in the encoder according to the second modification of the second embodiment. The cover 5 shown in FIG. 11 is provided with the suppressing portion 6B of FIG. 10, and further provided with a first protrusion 63 and a second protrusion 64. The second protrusion 64 is a protruding member that extends in the axial direction from the second end face 62 of the suppressing portion 6 </ b> B in order to suppress displacement of the motor lead wire 19 in the rotational direction. The second protrusion 64 may be manufactured integrally with the suppressing portion 6B, or may be manufactured separately from the suppressing portion 6B and then attached to the suppressing portion 6B. The second protrusion 64 only needs to be able to suppress displacement of the motor lead wire 19 in the rotational direction, and the shape thereof is not limited to the shape shown in the drawing.
　実施の形態１，２のエンコーダ１００－１，１００－２では、エンコーダリード線４及びモータリード線１９の少なくとも一方が、中継コネクタ１２に接続されることによって、中継コネクタ１２を介して、サーボアンプと電気的に接続される。従って、中継コネクタ１２がない場合に比べて、エンコーダリード線４又はモータリード線１９の配線長を短くすることができ、エンコーダリード線４又はモータリード線１９を開口部１４に通す作業が容易化され、エンコーダ１００－１，１００－２の組立時間が短縮される。 In the encoders 100-1 and 100-2 of the first and second embodiments, at least one of the encoder lead wire 4 and the motor lead wire 19 is connected to the relay connector 12, whereby the servo amplifier is connected via the relay connector 12. And electrically connected. Accordingly, the length of the encoder lead wire 4 or the motor lead wire 19 can be shortened compared to the case where the relay connector 12 is not provided, and the work of passing the encoder lead wire 4 or the motor lead wire 19 through the opening 14 is facilitated. Thus, the assembly time of the encoders 100-1 and 100-2 is shortened.
実施の形態３．
　図１２は本発明の実施の形態３に係るサーボモータの外観図である。図１２に示すサーボモータ２００は、例えばマシニングセンタ、ＮＣ旋盤、レ－ザ加工機、放電加工機などの工作機械に用いられるモータである。サーボモータ２００は、モータ３００と実施の形態１に係るエンコーダ１００－１とを備える。モータ３００は、ケース３０１と、ケース３０１の端部に設けられるブラケット８と、ケース３０１の内部に設けられ不図示のロータと、ロータに設けられるシャフト３０２とを備える。なお、実施の形態３に係るサーボモータ２００には、実施の形態１に係るエンコーダ１００－１の代わりに、実施の形態２に係るエンコーダ１００－２を用いてもよい。実施の形態３では、実施の形態１のエンコーダ１００－１又は実施の形態２のエンコーダ１００－２が用いられるため、カバー５の円筒部５ｂの軸方向長が短くなり、サーボモータ２００全体の更なる小型化を図ることができる。 Embodiment 3 FIG.
FIG. 12 is an external view of a servo motor according to Embodiment 3 of the present invention. A servo motor 200 shown in FIG. 12 is a motor used for a machine tool such as a machining center, an NC lathe, a laser machine, an electric discharge machine, or the like. Servo motor 200 includes motor 300 and encoder 100-1 according to the first embodiment. The motor 300 includes a case 301, a bracket 8 provided at an end of the case 301, a rotor (not shown) provided in the case 301, and a shaft 302 provided in the rotor. The servo motor 200 according to the third embodiment may use the encoder 100-2 according to the second embodiment instead of the encoder 100-1 according to the first embodiment. In the third embodiment, since the encoder 100-1 of the first embodiment or the encoder 100-2 of the second embodiment is used, the axial length of the cylindrical portion 5b of the cover 5 is shortened, and the entire servo motor 200 is further updated. The size can be reduced.
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
　１　基板、１ａ　第１基板面、１ｂ　第２基板面、１ｃ，３ｂ，８ａ１　外周部、１ｄ　窪み、２　電子部品、３，３Ａ　基板固定部、３ａ　端部、３ｃ　突起、４　エンコーダリード線、４Ａ　余長部分、５　カバー、５ａ　底部、５ｂ，８ａ　円筒部、５ｂ１　内周面、５ｃ　開口端、５ｅ　鍔部、６，６Ａ，６Ｂ　抑制部、７　ねじ、８　ブラケット、８ｂ　板部、９　第１コネクタ、１０　第２コネクタ、１１　第３コネクタ、１２　中継コネクタ、１３　ケーブル、１４　開口部、１５　壁面、１６　第１空間、１７　第２空間、１８　領域、１９　モータリード線、２０　第４コネクタ、３１　貫通孔、３２　凹部、６１　第１端面、６２　第２端面、６３　第１突起、６４　第２突起、１００－１，１００－２　エンコーダ、１５１　第１壁面、１５２　第２壁面、１５３　第３壁面、１５４　第４壁面、２００　サーボモータ、３００　モータ、３０１　ケース、３０２　シャフト。 1 substrate, 1a, 1st substrate surface, 1b, 2nd substrate surface, 1c, 3b, 8a1, outer peripheral portion, 1d depression, 2, electronic component, 3, 3A substrate fixing portion, 3a end portion, 3c protrusion, 4 encoder lead wire, 4A Extra length part, 5 cover, 5a bottom part, 5b, 8a cylindrical part, 5b1 inner peripheral surface, 5c open end, 5e collar part, 6,6A, 6B restraining part, 7 screws, 8 bracket, 8b plate part, 9 1st Connector, 10 second connector, 11 third connector, 12 relay connector, 13 cable, 14 opening, 15 wall surface, 16 first space, 17 second space, 18 region, 19 motor lead wire, 20 fourth connector, 31 Through hole, 32 recess, 61 first end face, 62 second end face, 63 first protrusion, 64 second protrusion, 100-1, 100-2 encoder 151 first wall surface, 152 second wall, 153 the third wall surface, 154 fourth wall 200 servo motor, 300 motor, 301 case, 302 the shaft.

Claims (10)

  1. 　第１基板面と前記第１基板面側とは逆側の第２基板面とを有する基板と、
    　前記第１基板面が接する端部を有し、前記端部に前記基板が固定される円筒形状の基板固定部と、
    　前記第２基板面と向き合う位置に設けられ、前記基板と電気的に接続され、ロータの回転位置を示す信号が伝送されるエンコーダリード線と、
    　前記第２基板面に設けられる電子部品と、
    　前記電子部品と向き合う底部と、前記基板固定部の外周部に回転可能に嵌め込まれると共に少なくともエンコーダリード線が通る開口部が形成される円筒部とを有する有底円筒状のカバーと、
    　前記円筒部に設けられ、前記開口部の縁から前記カバーの回転方向に沿った向きに伸び、前記基板固定部の軸方向への前記エンコーダリード線の位置ずれを抑制する抑制部と、
    　を備えることを特徴とするエンコーダ。     A substrate having a first substrate surface and a second substrate surface opposite to the first substrate surface;
    A cylindrical substrate fixing portion having an end portion in contact with the first substrate surface, and the substrate being fixed to the end portion;
    An encoder lead wire provided at a position facing the second substrate surface, electrically connected to the substrate, and transmitting a signal indicating a rotational position of the rotor;
    An electronic component provided on the second substrate surface;
    A bottomed cylindrical cover having a bottom portion facing the electronic component, and a cylindrical portion that is rotatably fitted to the outer peripheral portion of the substrate fixing portion and in which an opening portion through which at least the encoder lead wire passes is formed;
    A restraining portion that is provided in the cylindrical portion, extends from the edge of the opening in a direction along the rotation direction of the cover, and suppresses displacement of the encoder lead wire in the axial direction of the substrate fixing portion;
    An encoder comprising:
  2. 　前記円筒部の内周面と向き合う前記基板の外周部の内、少なくとも一部の領域と、当該領域に向き合う前記円筒部の内周面との間の隙間が、前記線径よりも小さいことを特徴とする請求項１に記載のエンコーダ。 A gap between at least a part of the outer peripheral portion of the substrate facing the inner peripheral surface of the cylindrical portion and the inner peripheral surface of the cylindrical portion facing the region is smaller than the wire diameter. The encoder according to claim 1.
  3. 　前記軸方向における前記抑制部の前記底部側の第１端面から前記底部までの幅は、
    　前記軸方向における前記第２基板面から前記底部までの幅よりも狭いことを特徴とする請求項１又は２に記載のエンコーダ。     The width from the first end surface on the bottom side of the suppressing portion in the axial direction to the bottom portion is:
    The encoder according to claim 1, wherein the encoder is narrower than a width from the second substrate surface to the bottom in the axial direction.
  4. 　前記第１端面には、前記エンコーダリード線の前記回転方向への位置ずれを抑制する第１突起が設けられることを特徴とする請求項３に記載のエンコーダ。 The encoder according to claim 3, wherein the first end surface is provided with a first protrusion that suppresses a displacement of the encoder lead wire in the rotation direction.
  5. 　前記開口部には、前記第１基板面と向き合う位置に設けられモータに電力を供給するモータリード線が通され、
    　前記抑制部は、前記エンコーダリード線と前記モータリード線とを前記軸方向に離しながら、前記カバーの回転時における前記エンコーダリード線及び前記モータリード線のそれぞれの前記軸方向への位置ずれを抑制することを特徴とする請求項１から４の何れか一項に記載のエンコーダ。     A motor lead wire that is provided at a position facing the first substrate surface and supplies power to the motor is passed through the opening,
    The suppression unit suppresses displacement of the encoder lead wire and the motor lead wire in the axial direction during rotation of the cover while separating the encoder lead wire and the motor lead wire in the axial direction. The encoder according to any one of claims 1 to 4, characterized by:
  6. 　前記軸方向における前記抑制部の前記底部側の第１端面とは逆側の第２端面から前記円筒部の開口端までの幅は、
    　前記軸方向における前記第１基板面から前記開口端までの幅よりも狭いことを特徴とする請求項５に記載のエンコーダ。     The width from the second end surface opposite to the first end surface on the bottom side of the suppression portion in the axial direction to the opening end of the cylindrical portion is:
    The encoder according to claim 5, wherein the encoder is narrower than a width from the first substrate surface to the opening end in the axial direction.
  7. 　前記第２端面には、前記モータリード線の前記回転方向への位置ずれを抑制する第２突起が設けられることを特徴とする請求項６に記載のエンコーダ。 The encoder according to claim 6, wherein the second end face is provided with a second protrusion that suppresses a displacement of the motor lead wire in the rotation direction.
  8. 　前記開口部を閉塞するように前記円筒部の外周部に固定される中継コネクタを備え、
    　前記エンコーダリード線は前記中継コネクタに接続されることを特徴とする請求項１から７の何れか一項に記載のエンコーダ。     Comprising a relay connector fixed to the outer peripheral portion of the cylindrical portion so as to close the opening;
    The encoder according to claim 1, wherein the encoder lead wire is connected to the relay connector.
  9. 　前記円筒部は、前記電子部品と前記底部との間の隙間が前記エンコーダリード線の線径より小さくなるように、前記基板固定部の外周部に回転可能に嵌め込まれることを特徴とする請求項１から８の何れか一項に記載のエンコーダ。 The cylindrical portion is rotatably fitted in an outer peripheral portion of the substrate fixing portion so that a gap between the electronic component and the bottom portion is smaller than a wire diameter of the encoder lead wire. The encoder according to any one of 1 to 8.
  10. 　請求項１から９の何れか一項に記載のエンコーダと、モータとを備えることを特徴とするサーボモータ。 A servomotor comprising the encoder according to any one of claims 1 to 9 and a motor.
PCT/JP2018/022520 2018-06-13 2018-06-13 Encoder and servomotor WO2019239508A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201880010281.5A CN110832285B (en) 2018-06-13 2018-06-13 Encoder assembling method, encoder and servo motor
JP2018563530A JP6479297B1 (en) 2018-06-13 2018-06-13 Encoder assembly method, encoder and servo motor
PCT/JP2018/022520 WO2019239508A1 (en) 2018-06-13 2018-06-13 Encoder and servomotor
KR1020197021878A KR102157817B1 (en) 2018-06-13 2018-06-13 Encoder assembly method, encoder and servo motor
TW108119420A TWI707124B (en) 2018-06-13 2019-06-05 Method of assembling encoder, encoder and servo motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/022520 WO2019239508A1 (en) 2018-06-13 2018-06-13 Encoder and servomotor

Publications (1)

Publication Number Publication Date
WO2019239508A1 true WO2019239508A1 (en) 2019-12-19

Family

ID=65655824

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/022520 WO2019239508A1 (en) 2018-06-13 2018-06-13 Encoder and servomotor

Country Status (5)

Country Link
JP (1) JP6479297B1 (en)
KR (1) KR102157817B1 (en)
CN (1) CN110832285B (en)
TW (1) TWI707124B (en)
WO (1) WO2019239508A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185557A (en) * 2007-01-31 2008-08-14 Sendai Nikon:Kk Unit for positioning rotary encoder and rotary encoder having the same
JP2013187922A (en) * 2012-03-06 2013-09-19 Nippon Densan Corp Fan motor
WO2017145613A1 (en) * 2016-02-23 2017-08-31 株式会社日立製作所 Axial-gap rotary electric machine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5763970A (en) * 1997-03-03 1998-06-09 Lexmark International, Inc. Encoder system with cover mounted encoder
CN2828755Y (en) * 2005-10-25 2006-10-18 沈波 Rotary coder displacement measuring device
DE102006026543B4 (en) * 2006-06-07 2010-02-04 Vogt Electronic Components Gmbh Position encoder and associated method for detecting a position of a rotor of a machine
JP5195458B2 (en) * 2009-01-26 2013-05-08 日本精工株式会社 Electric motor and electric power steering apparatus provided with the electric motor
US9752617B2 (en) * 2010-09-03 2017-09-05 Ntn Corporation Bearing assembly with rotation sensor
CN103946675A (en) 2011-12-27 2014-07-23 株式会社安川电机 Encoder and servomotor
JP2013187992A (en) * 2012-03-07 2013-09-19 Jtekt Corp Electric motor control device and vehicle steering apparatus including the same
JP6373079B2 (en) * 2014-06-13 2018-08-15 日本電産サンキョー株式会社 Sensor device and encoder
JP6582568B2 (en) * 2014-07-31 2019-10-02 株式会社デンソー DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE USING THE SAME
JP6179476B2 (en) * 2014-07-31 2017-08-16 株式会社デンソー DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE USING THE SAME
CN205829399U (en) * 2016-06-17 2016-12-21 株式会社安川电机 A kind of encoder shade assembly and motor apparatus
CN206442248U (en) * 2017-01-22 2017-08-25 无锡市宏泰电机股份有限公司 A kind of structure of installing encoders for motor
CN206724978U (en) * 2017-05-12 2017-12-08 华南理工大学 A kind of raster rotary coder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185557A (en) * 2007-01-31 2008-08-14 Sendai Nikon:Kk Unit for positioning rotary encoder and rotary encoder having the same
JP2013187922A (en) * 2012-03-06 2013-09-19 Nippon Densan Corp Fan motor
WO2017145613A1 (en) * 2016-02-23 2017-08-31 株式会社日立製作所 Axial-gap rotary electric machine

Also Published As

Publication number Publication date
KR102157817B1 (en) 2020-09-18
CN110832285B (en) 2021-05-07
JPWO2019239508A1 (en) 2020-06-25
TWI707124B (en) 2020-10-11
KR20200066586A (en) 2020-06-10
JP6479297B1 (en) 2019-03-06
TW202001195A (en) 2020-01-01
CN110832285A (en) 2020-02-21

Similar Documents

Publication Publication Date Title
JP6520739B2 (en) Drive unit
US20180115224A1 (en) Motor
US20190305650A1 (en) Motor
JP2007097241A (en) Motor
JP4085079B2 (en) Rotation detection sensor
KR20080100285A (en) Electronic device case
JP2018125940A (en) Driving device
JP6439572B2 (en) Electronic control device and driving device
JP6559370B1 (en) Encoder and servo motor
EP1367692B1 (en) Stator structure for a rotation detector
JP5523044B2 (en) Drive control device and motor unit
JP2023068175A (en) Rotor, motor, and wiper motor
US10686348B2 (en) Electric actuator
JP6479297B1 (en) Encoder assembly method, encoder and servo motor
JP6396862B2 (en) Structure-integrated rotating electrical machine
KR20170112618A (en) Shielding structure of electro control unit
JP4702593B2 (en) motor
US10637332B2 (en) Electric actuator
WO2016063428A1 (en) Electric-motor stator, electric motor, and air conditioner
TWI701424B (en) Encoder and servomotor
JP6771655B2 (en) Electric power steering device
US11873840B2 (en) Motor and axial fan
WO2023223449A1 (en) Circuit connection device and rotating electrical machine device
WO2021065451A1 (en) Motor unit
WO2021065452A1 (en) Motor unit

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2018563530

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18922593

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18922593

Country of ref document: EP

Kind code of ref document: A1