WO2023139656A1 - モータユニット構造、ギヤ取付用治具及びモータシャフトのギヤ取付方法 - Google Patents

モータユニット構造、ギヤ取付用治具及びモータシャフトのギヤ取付方法 Download PDF

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Publication number
WO2023139656A1
WO2023139656A1 PCT/JP2022/001639 JP2022001639W WO2023139656A1 WO 2023139656 A1 WO2023139656 A1 WO 2023139656A1 JP 2022001639 W JP2022001639 W JP 2022001639W WO 2023139656 A1 WO2023139656 A1 WO 2023139656A1
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WO
WIPO (PCT)
Prior art keywords
gear
shaft
motor
motor shaft
key
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2022/001639
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English (en)
French (fr)
Japanese (ja)
Inventor
俊彦 井上
要 菊地
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to CN202280084975.XA priority Critical patent/CN118435502A/zh
Priority to US18/724,913 priority patent/US20250105700A1/en
Priority to DE112022005326.7T priority patent/DE112022005326T5/de
Priority to PCT/JP2022/001639 priority patent/WO2023139656A1/ja
Priority to JP2023574913A priority patent/JPWO2023139656A1/ja
Priority to TW111149451A priority patent/TW202345492A/zh
Publication of WO2023139656A1 publication Critical patent/WO2023139656A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/40—Assembling dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/90—Positioning or clamping dynamo-electric machines, e.g. jigs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts

Definitions

  • the present invention relates to a motor unit structure, a gear mounting jig, and a gear mounting method for a motor shaft.
  • An object of the present invention is to provide a motor unit structure, a gear mounting jig, and a method for mounting a gear on a motor shaft suitable for automating the work of mounting a gear on a motor shaft.
  • a first aspect of the present disclosure is a motor unit structure comprising: a motor having a key at the tip of a motor shaft; a gear having a key groove into which the key is inserted; It has a non-fitting portion that does not fit with the motor shaft that is formed and is inserted into the shaft hole.
  • a second aspect of the present disclosure is a gear mounting jig for mounting a gear on the tip of a motor shaft, wherein the motor shaft has a key at the tip, a guide shaft is connected to the shaft end on the tip side, the gear has a key groove into which the key is inserted, and a shaft hole through which the guide shaft is inserted along the axial direction.
  • the leading end of the guide shaft is inserted into the shaft hole of the gear
  • the key of the motor shaft is aligned with the key groove of the gear
  • the motor shaft is inserted into the shaft hole of the gear so that the key of the motor shaft and the key groove of the gear are fitted
  • the drive section rotates the movable shaft to screw the guide shaft and the movable shaft together
  • the drive section rotates the movable shaft to engage the guide shaft and the movable shaft. It is used to press-fit and attach the gear to the tip of the motor shaft by pulling the guide shaft toward the movable shaft.
  • a third aspect of the present disclosure is a method of attaching a gear to a motor shaft to form the motor unit structure of the first aspect by attaching a gear to the tip of the motor shaft, wherein the motor shaft has a key at the tip, a guide shaft is connected to the shaft end on the tip side, the gear has a key groove into which the key is inserted and a shaft hole through which the guide shaft is inserted, the gear having a shaft hole through which the guide shaft is inserted.
  • a motor unit structure a gear mounting jig, and a method for mounting a gear on a motor shaft that are suitable for automating the work of mounting a gear on a motor shaft.
  • FIG. 1 is a configuration diagram of a gear mounting system 1 according to an embodiment;
  • FIG. 1 is a configuration diagram of a gear mounting jig 10;
  • FIG. 2 is a configuration diagram of a motor 20;
  • FIG. 4 is a cross-sectional view taken along line s1-s1 of FIG. 3;
  • FIG. 3 is a cross-sectional view of gear 30.
  • FIG. 6 is a cross-sectional view taken along line s2-s2 of FIG. 5;
  • FIG. FIG. 2 is a sectional view taken along line s3-s3 of FIG. 1;
  • FIG. 6 is a sectional view taken along line s4-s4 of FIG. 5; It is a figure explaining the procedure of the gear attachment method. It is a figure explaining the procedure of the gear attachment method.
  • FIG. 10 is a sectional view taken along line s5-s5 of FIG. 9;
  • FIG. 11 is a sectional view taken along line s6-s6 of FIG. 10;
  • FIG. 11 is a sectional view taken along line s7-s7 of FIG. 10;
  • 3 is a configuration diagram of a motor unit 50.
  • FIG. It is a sectional view of gear 30A in a modification.
  • 4 is a cross-sectional view showing another configuration example of the claw 18 and the claw holding portion 19.
  • FIG. It is a block diagram of 1 A of gear mounting systems in a deformation
  • FIG. 19 is a sectional view taken along line s8-s8 of FIG. 18;
  • the front-rear (horizontal) direction of the gear mounting system 1 shown in FIG. 1 is defined as the X-axis.
  • the X-axis Of the X directions along the X axis, one direction is the X1 direction, and the other direction opposite to the X1 direction is the X2 direction.
  • the axis orthogonal to the X-axis is defined as the Y-axis.
  • the Y directions along the Y axis one direction is the Y1 direction, and the opposite direction to the Y1 direction is the Y2 direction.
  • "direction" is also referred to as "side” as appropriate.
  • FIG. 1 is a configuration diagram of a gear mounting system 1 according to an embodiment.
  • FIG. 2 is a configuration diagram of the gear mounting jig 10.
  • FIG. 3 is a configuration diagram of the motor 20.
  • FIG. 1 to 3 a part of which is shown as a cross-sectional view. 4 is a cross-sectional view taken along line s1-s1 of FIG. 3.
  • FIG. FIG. 5 is a cross-sectional view of gear 30.
  • FIG. FIG. 6 is a cross-sectional view taken along line s2-s2 of FIG. 7A is a cross-sectional view taken along line s3-s3 of FIG. 1.
  • FIG. FIG. 7B is a cross-sectional view taken along line s4-s4 of FIG.
  • the gear mounting system 1 is a system for mounting a gear 30 on a motor 20 using a gear mounting jig 10.
  • FIG. 1 shows a state in which the gear 30 is held by the gear mounting jig 10 .
  • the gear mounting jig 10 holding the gear 30 and the motor 20 are installed on a base (not shown).
  • the gear mounting jig 10 holding the gear 30 is fixed to the X1 side of the base.
  • the motor 20 is installed on the X2 side of the base so as to be movable in the X direction by a linear guide device (not shown). 1, illustration of a guide shaft 11 (described later) included in the gear mounting jig 10 is omitted.
  • the gear mounting jig 10 has a guide shaft 11 , a jig motor 12 (driving section), and a movable shaft 13 . Further, the gear mounting jig 10 has a motor frame 16 , an adapter 17 , claws 18 and claw holding portions 19 . In this embodiment, the pawl 18 and the pawl holding portion 19 constitute a gear holding portion.
  • the guide shaft 11 is a rod-shaped member connected to a motor shaft 22 (described later).
  • the guide shaft 11 has a first threaded portion 11a on its outer peripheral surface.
  • the first threaded portion 11a is a male thread that can be screwed with a second threaded portion 14a (described later) of the movable shaft 13 .
  • the jig motor 12 is a driving source that generates driving force for rotating the movable shaft 13 (described later).
  • the jig motor 12 is fixed to an adapter 17 (described later) on the X2 side.
  • a movable shaft 13 (shaft portion 15 ) is connected to a motor shaft 12 a as an output shaft of the jig motor 12 .
  • the movable shaft 13 connected to the motor shaft 12a rotates at the position shown in FIG.
  • the motor shaft 12a and the movable shaft 13 may be directly connected, or may be connected via a gear mechanism (not shown).
  • the jig motor 12 is housed in a motor frame 16.
  • the motor frame 16 is a substantially cylindrical case that covers the jig motor 12 .
  • the X1 side of the motor frame 16 is connected with the robot flange 40 .
  • the robot flange 40 is a member that transmits to the motor frame 16 power for rotating the entire gear mounting jig 10 .
  • the X2 side of the motor frame 16 is connected with the adapter 17 .
  • the adapter 17 is a disc-shaped member that is axially connected to the jig motor 12 and the claw holder 19 .
  • the jig motor 12 , the motor frame 16 and the adapter 17 rotate together with the rotation of the robot flange 40 . Further, when the adapter 17 rotates, the pawl holder 19 and the pawl 18 connected to the adapter 17 also rotate.
  • the movable shaft 13 rotates while being screwed with the guide shaft 11, thereby moving the guide shaft 11 along the axial direction.
  • the axial direction is, for example, a direction parallel to the X-axis shown in FIG.
  • a symbol a0 indicates a virtual centerline when the gear mounting jig 10, the motor 20, and the gear 30, which constitute the gear mounting system 1, are arranged as shown in FIG.
  • the centerline a0 is along the X-axis.
  • the center line a0 will also be referred to as "central axis" or "central axis a0" as appropriate.
  • the movable shaft 13 has a threaded portion 14 and a shaft portion 15 .
  • the threaded portion 14 is a nut-shaped member that is threadedly engaged with the guide shaft 11 .
  • a second threaded portion 14 a is provided on the inner peripheral surface of the threaded portion 14 .
  • the second threaded portion 14a is a female thread that can be screwed with the first threaded portion 11a of the guide shaft 11 .
  • the shaft portion 15 is a tubular member connected to the motor shaft 12 a of the jig motor 12 .
  • the shaft portion 15 is connected to the motor shaft 12a of the jig motor 12 at the end on the X1 side.
  • the shaft portion 15 is not connected to the adapter 17 at the end on the X1 side.
  • the threaded portion 14 is connected to the end portion of the shaft portion 15 on the X2 side.
  • the shaft portion 15 has a shaft hole 15a.
  • the shaft hole 15a is a through hole in which the guide shaft 11 can move, and extends along the center line a0. No thread is provided on the inner peripheral surface of the shaft hole 15a.
  • the pawl 18 and the pawl holding portion 19 are mechanisms for holding the gear 30 so that the central axis of the motor shaft 22 and the shaft hole 31 of the gear 30 are aligned in the axial direction, and for holding the gear 30 so as not to rotate in the circumferential direction.
  • the claw 18 is a member that grips the gear 30 .
  • the X2 side of the claw 18 is configured in a substantially L shape.
  • a tip portion of the pawl 18 is configured to contact a flat portion 37 (described later) of the gear 30 in the radial direction of the gear 30 .
  • the claws 18 are provided at two locations facing each other across the center line a0 when viewed from the axial direction. As will be described later, the number and arrangement of the claws 18 are not limited to the example of this embodiment.
  • the claw holding part 19 is a mechanism for moving two claws 18 facing each other across the central axis a0 in the radial direction, and can fix the position of each claw 18 with a gear 30 held between the two claws 18.
  • the end of the claw holding portion 19 on the X1 side is connected to the adapter 17 .
  • a hollow chuck mechanism driven by hydraulic pressure, air, or the like, for example, can be used as the claw 18 and the claw holding portion 19 (gear holding portion).
  • Motor 20 is a rotating electric machine to which gear 30 is attached, and is, for example, a servo motor. As shown in FIG. 3, the motor 20 has a frame 21, a motor shaft 22 and an encoder . Also, the motor 20 has a rotor, a stator, bearings, etc. (none of which are shown) in the frame 21 .
  • the frame 21 is an exterior member to which the above components are mounted or attached.
  • the motor shaft 22 is an output shaft and supports the rotor inside the frame 21 .
  • the motor shaft 22 is inserted through the central axis of the rotor and fixed to the rotor.
  • the encoder 23 is a device that detects the position and speed of the rotating motor shaft 22 .
  • the portion on the X1 side of the motor shaft 22 that is fitted with the fitting portion 34 of the gear 30 and the portion to which the key 24 (described later) is attached is also referred to as a "tip portion".
  • the gear 30 when the gear 30 is attached to the motor shaft 22, if force acts in the axial direction of the motor shaft 22, the bearing (not shown), the encoder 23, etc. may be affected. Therefore, when the gear 30 is attached to the motor shaft 22 , it is required to suppress the force acting in the axial direction of the motor shaft 22 . According to the gear mounting jig and the gear mounting method of the present embodiment, as will be described later, when the gear 30 is mounted on the motor shaft 22, it is possible to suppress the force acting in the axial direction of the motor shaft 22 (in particular, the X2 direction).
  • a key 24 is attached to the end of the motor shaft 22 on the X1 side.
  • the key 24 is a member for connecting the motor shaft 22 and the gear 30 to transmit the rotation of the motor shaft 22 to the gear 30, and is, for example, a parallel key.
  • the key 24 is press-fitted into a key mounting groove 25 formed at the end of the motor shaft 22 on the X1 side.
  • the motor shaft 22 has a shaft screw hole 26 at the shaft end on the X1 side (front end side).
  • the shaft threaded hole 26 is a threaded hole for connecting the X2-side end of the guide shaft 11, and has a third threaded portion 26a on its inner peripheral surface.
  • the third threaded portion 26 a is a female thread that can be screwed with the first threaded portion 11 a provided on the outer peripheral surface of the guide shaft 11 .
  • the guide shaft 11 is connected to the shaft screw hole 26 of the motor shaft 22 in advance when the gear 30 is attached to the tip of the motor shaft 22 .
  • Gear 30 is a gear attached to motor shaft 22 of motor 20 . As shown in FIG. 5 , the gear 30 has a shaft hole 31 , a base portion 32 and a gear portion 33 .
  • the shaft hole 31 is a through hole extending along the axial direction of the gear 30 .
  • a fitting portion 34 and the like are formed along the axial direction inside the shaft hole 31.
  • the substantially cylindrical internal space penetrating the gear 30 along the axial direction is collectively referred to as the "shaft hole”.
  • the base 32 is a portion into which the tip of the motor shaft 22 is inserted.
  • the base 32 is provided on the tip side (X2 side) in the direction in which the motor shaft 22 is inserted.
  • the base 32 has a fitting portion 34 and a non-fitting portion 35 .
  • the fitting portion 34 is formed on the rear end side (X1 side) in the direction in which the motor shaft 22 is inserted, and is a portion that is fitted with the motor shaft 22 inserted into the shaft hole 31 .
  • the fitting portion 34 has an inner diameter d ⁇ b>1 that can be fitted with the tip portion of the motor shaft 22 .
  • a base portion 32 and a gear portion 33 (described later) are integrally formed.
  • the non-fitting portion 35 is formed on the front end side (X2 side) opposite to the rear end side (X1 side) in the direction in which the motor shaft 22 is inserted, and is a portion that does not fit with the motor shaft 22 inserted into the shaft hole 31. That is, the motor shaft 22 inserted into the shaft hole 31 passes through the non-fitting portion 35 but is not fitted to each other.
  • both the fitting portion 34 and the non-fitting portion 35 have a cylindrical shape with uniform inner diameters d1 and d2 along the axial direction of the gear 30 .
  • the inner diameter d2 of the non-fitting portion 35 is set to the outer diameter D1 of the motor shaft 22 (see FIG. 3) so that d2>D1.
  • the ratio of the outer diameter D1 of the motor shaft 22 to the inner diameter d2 of the non-fitting portion 35 is, for example, about 1:1.01 to 1:1.2.
  • the value of (D1-d2)/2 is desirably set to be larger than the tolerance of deviation of the central axes of the motor 20 and the gear 30 in the gear mounting system 1 shown in FIG.
  • the non-fitting portion 35 has a shape that does not fit with the motor shaft 22 inserted into the shaft hole 31 over the entire axial direction. Therefore, for example, a shape in which the corner portion on the tip side (X2 side) in the direction in which the motor shaft 22 is inserted into the shaft hole 31 is chamfered with a square face, a round face, or the like does not satisfy the configuration of the non-fitting portion 35.
  • the fitting portion 34 and the non-fitting portion 35 both have a cylindrical shape with uniform inner diameters d1 and d2 along the axial direction of the gear 30, but as will be described later, the shape of the fitting portion 34 and the non-fitting portion 35 is not limited to the example of the present embodiment.
  • the base 32 has a keyway 36 .
  • the key groove 36 is a portion into which the key 24 (see FIG. 3) of the motor shaft 22 is inserted when the gear 30 is attached to the motor shaft 22 .
  • the keyway 36 is a generally concave groove. 5
  • the key groove 36 is formed along the axial direction from the end of the fitting portion 34 on the X1 side to the end of the non-fitting portion 35 on the X2 side.
  • the base 32 has a flat portion 37 on its outer surface.
  • the flat portions 37 are a pair of flat surfaces parallel to each other with the center axis (center line a0) interposed therebetween, and the claws 18 of the gear mounting jig 10 come into contact.
  • the gear 30 is fixed in a state in which the center axis of the motor shaft 22 and the center of the shaft hole of the gear 30 are aligned in the axial direction by the pawl 18 coming into contact with the flat portion 37 (base portion 32). Further, the gear 30 is fixed so as not to rotate in the circumferential direction by the pawl 18 coming into contact with the flat portion 37 .
  • the gear part 33 is a part that meshes with, for example, a spur gear (not shown) provided in a drive mechanism such as a robot arm, and transmits the rotational force of the motor 20 to the spur gear.
  • the gear portion 33 is provided on the rear end side (X1 side) in the direction in which the motor shaft 22 is inserted.
  • a tooth portion 33a that meshes with the spur gear is provided on the outer periphery of the gear portion 33.
  • the gear portion 33 has a shaft hole 33b (shaft hole 31) extending along the axial direction.
  • the shaft hole 33 b is a through hole into which the guide shaft 11 is inserted when the gear 30 is attached to the motor shaft 22 .
  • a threaded portion is not provided on the inner peripheral surface of the shaft hole 33b.
  • a part of the shaft hole 33b also extends to the base portion 32, and communicates with the fitting portion 34 on the X1 side of the base portion 32. As shown in FIG.
  • FIG. 8 to 10 are diagrams for explaining the procedure of the gear mounting method.
  • 11 is a cross-sectional view taken along line s5-s5 of FIG. 9.
  • FIG. 12 is a cross-sectional view taken along line s6-s6 of FIG. 10.
  • FIG. 13 is a cross-sectional view taken along line s7-s7 of FIG. 10.
  • FIG. 14 is a configuration diagram of the motor unit 50. As shown in FIG. It is assumed that when the gear 30 is attached to the motor shaft 22 , the gear 30 is held by the gear attachment jig 10 and the guide shaft 11 is connected to the motor shaft 22 of the motor 20 .
  • the guide shaft 11 connected to the motor shaft 22 of the motor 20 is inserted into the shaft hole 31 of the gear 30 (first insertion step).
  • This work can be performed by moving the motor 20 in the X1 direction with respect to the gear mounting jig 10 on a base (not shown).
  • the movement of the motor 20 is temporarily stopped to match the phases of the key 24 and the key groove 36 (phase matching step).
  • the key 24 and keyway 36 are aligned by rotating the robot flange 40 with respect to the key 24 of the motor shaft 22 . That is, by rotating the robot flange 40 clockwise or counterclockwise to move the pawl 18 holding the gear 30 together with the motor frame 16, the adapter 17 and the pawl holder 19 in the circumferential direction, the phases of the key 24 and the key groove 36 can be aligned.
  • the motor 20 is further moved in the X1 direction while the phases of the key 24 and the key groove 36 are aligned, and the tip of the motor shaft 22 is inserted into the non-fitting portion 35 of the gear 30 so that the key 24 and the key groove 36 are axially fitted (second insertion step).
  • the tip of the motor shaft 22 is inserted into the non-fitting portion 35 of the gear 30 .
  • the tip portion of the motor shaft 22 and the non-fitting portion 35 do not fit together.
  • the tip portion of the motor shaft 22 is not fitted with the fitting portion 34 of the gear 30 either. Therefore, when starting to fit the key 24 and the keyway 36, it is not necessary to consider the fit between the tip of the motor shaft 22 and the fitting portion 34 of the gear 30.
  • the jig motor 12 of the gear mounting jig 10 is driven to rotate the movable shaft 13.
  • the guide shaft 11 and the threaded portion 14 can be screwed together while moving the guide shaft 11 in the axial direction.
  • the direction in which the movable shaft 13 is rotated is, for example, the clockwise direction when the movable shaft 13 is viewed from the X1 side to the X2 side.
  • the guide shaft 11 When the guide shaft 11 and the threaded portion 14 are screwed together, the guide shaft 11 is pulled in the gear 30 direction (X1 direction) while the key 24 and the key groove 36 are engaged with each other. That is, the guide shaft 11 moves in the X1 direction in synchronization with the rotation of the threaded portion 14 .
  • the motor shaft 22 (motor 20) is moved in the X1 direction at the same speed by the linear guide device of the base (not shown).
  • the tip of the motor shaft 22 is press-fitted into the fitting portion 34 of the gear 30 (press-fitting step).
  • the gear 30 is attached to the tip of the motor shaft 22 by press-fitting until the tip of the motor shaft 22 reaches the end of the fitting portion 34 of the gear 30 on the X1 side.
  • the fitting portion 34 of the gear 30 and the motor shaft 22 are fitted without a gap as shown in FIG.
  • FIG. 13 sectional view taken along line s7-s7 in FIG. 10
  • the non-engagement portion 35 of the gear 30 and the motor shaft 22 are not engaged with each other because a gap is formed between them.
  • the jig motor 12 of the gear mounting jig 10 is driven to rotate the movable shaft 13 counterclockwise when viewed from the X1 side to the X2 side.
  • the guide shaft 11 moves away from the gear mounting jig 10 . That is, the guide shaft 11 moves in the X2 direction together with the motor 20 and the gear 30.
  • the gear 30 has a fitting portion 34 that fits with the motor shaft 22 inserted into the shaft hole 31 on the rear end side in the direction in which the motor shaft 22 is inserted, and a non-fitting portion 35 that does not fit with the motor shaft 22 inserted in the shaft hole 31 on the front end side in the direction in which the motor shaft 22 is inserted.
  • the motor unit 50 having the motor unit structure of this embodiment is suitable for automating the work of attaching the gear 30 to the motor shaft 22 .
  • the gear 30 has a flat portion (flat surface) 37 on its outer circumference. According to this configuration, when the gear 30 is attached to the tip portion of the motor shaft 22, the gear 30 can be fixed so as not to rotate in the circumferential direction by bringing the fixing member into contact with the flat portion 37.
  • the motor unit 50 of this embodiment has a shaft screw hole 26 for connecting the guide shaft 11 to the shaft end of the motor shaft 22 on the X1 side.
  • the guide shaft 11 can be connected to the motor shaft 22 by screwing the guide shaft 11 into the shaft screw hole 26 of the motor shaft 22 and fastening it.
  • the guide shaft 11 can be easily removed from the motor shaft 22 by releasing the fastening between the shaft screw hole 26 of the motor shaft 22 and the guide shaft 11.
  • the gear mounting jig 10 of the present embodiment includes a guide shaft 11, a movable shaft 13 that rotates while being screwed with the guide shaft 11 to move the guide shaft 11 along the axial direction, and a jig motor (drive unit) 12 that rotates the movable shaft 13.
  • the motor unit 50 can be manufactured by the above-described procedure, so it is suitable for automating the operation of attaching the gear 30 to the tip of the motor shaft 22 .
  • the guide shaft 11 has a first threaded portion 11a on its outer peripheral surface. Therefore, even when the shaft hole 31 of the gear 30 is smaller than the outer diameter D1 (see FIG. 3) of the motor shaft 22, the gear 30 can be press-fitted onto the motor shaft 22 while being accurately moved along the axial direction. Further, by holding the gear 30 in the gear mounting jig 10 of the present embodiment, the key 24 can be press-fitted into the key mounting groove 25 of the motor shaft 22 by the end of the gear 30 on the X2 side (the portion without the key groove 36).
  • the gear mounting jig 10 of the present embodiment has a pawl 18 and a pawl holding portion 19 (gear holding portion) for holding the gear 30 so that the center axis of the motor shaft 22 and the shaft hole 31 of the gear 30 are aligned in the axial direction. According to this configuration, phase matching between the key 24 attached to the motor shaft 22 and the key groove 36 of the gear 30 can be easily performed. Further, by bringing the pawl 18 and the flat portion 37 of the gear 30 into contact with each other, the gear 30 can be held so as not to rotate in the circumferential direction in the second insertion step. Since the gear mounting jig 10 of the present embodiment has the jig motor 12 as a driving portion for rotating the movable shaft 13, it is possible to reduce the work burden on the operator and is suitable for automation.
  • the gear mounting method of the present embodiment includes the above-described first insertion process, phase matching process, second insertion process, and press-fitting process, and the motor unit 50 can be manufactured according to the procedures shown in each of the above processes. According to the gear mounting method of the present embodiment, it is not necessary to simultaneously control the fitting state between the key 24 and the key groove 36 and the fitting state between the tip portion of the motor shaft 22 and the gear 30 (fitting portion 34). Therefore, the gear mounting method of the present embodiment is suitable for automating the work of mounting the gear 30 on the motor shaft 22 when manufacturing the motor unit 50 having the motor unit structure.
  • the guide shaft 11 and the movable shaft 13 are screwed together and the movable shaft 13 is rotated to pull the guide shaft 11 toward the gear 30 side and press-fit the gear 30 to the tip of the motor shaft 22.
  • the gear 30 can be moved along the guide shaft 11 , so that the tip of the motor shaft 22 can be press-fitted into the gear 30 while suppressing positional deviation between the motor shaft 22 and the gear 30 .
  • the second insertion step and the press-fitting step are performed in a state in which the rotation of the gear 30 in the circumferential direction is restricted, so that the fitting between the key 24 and the key groove 36 and the fitting between the tip of the motor shaft 22 and the gear 30 (fitting portion 34) can be performed with higher precision and more certainty.
  • the guide shaft 11 is pulled toward the gear 30, and the motor shaft 22 (motor 20) is moved toward the movable shaft 13 at the same speed.
  • the moving speed of the guide shaft 11 can be increased while reducing the load torque when the jig motor 12 moves the guide shaft 11 in the X1 direction.
  • the gear mounting jig 10 is removed from the motor unit 50 after the gear 30 is mounted on the motor shaft 22, the motor 20 is moved in the X2 direction at the same speed while moving the guide shaft 11 in the X2 direction.
  • the moving speed of the guide shaft 11 can be increased while reducing the load torque when the jig motor 12 moves the guide shaft 11 in the X2 direction.
  • 15 and 16 are cross-sectional views of gears 30A-30C in modified form.
  • the fitting portion 34 and the non-fitting portion 35 each have a tapered shape that expands from the rear end side (X1 side) in the direction in which the motor shaft 22 is inserted along the tip side (X2 side).
  • the non-fitting portion 35 is set to have a larger diameter expansion rate than the fitting portion 34 .
  • the fitting portion 34 has a cylindrical shape with a uniform inner diameter along the axial direction of the gear 30.
  • the non-fitting portion 35 has a tapered shape whose diameter increases from the rear end side (X1 side) in the direction in which the motor shaft 22 is inserted to the front end side (X2 side).
  • the gear 30 is not limited to the above-described embodiments and modifications, and may have any shape.
  • the tapered shape is not limited to a linear shape as shown in FIG. 15 in a cross-sectional view, and may be, for example, a curved shape that is concave from the outer peripheral side to the inner peripheral side.
  • FIG. 17 is a cross-sectional view showing another configuration example of the claw 18 and the claw holding portion 19.
  • FIG. 17 for example, corresponds to the s3-s3 line section of FIG. In FIG. 17, illustration of the claw holding portion 19 is omitted.
  • three claws 18 may be provided at equal intervals (120° intervals) around the central axis a0.
  • the center of the shaft hole of the gear 30 can be aligned with the central axis a0.
  • the claws 18 may be provided at three locations at equal intervals around the center line a0 when viewed from the axial direction, or may be provided at four or more locations (not shown).
  • FIG. 18 is a configuration diagram of a gear mounting system 1A in a modified form.
  • 19 is a cross-sectional view taken along line s8-s8 of FIG. 18.
  • FIG. A gear mounting system 1A shown in FIG. 18 differs from the embodiment in the configuration of a claw 18 of a gear mounting jig 10 and a claw holding portion 19 (gear holding portion).
  • the claw holder 19 of this embodiment is configured by, for example, a parallel hand.
  • the end of the claw holding portion 19 on the X1 side is connected to the adapter 17 on one side of the center line a0 (the Y1 side in FIG. 18). As shown in FIG.
  • the gear 30 can be held between the two pawls 18 by moving the two pawls 18 facing each other across the central axis a0 in the radial direction (horizontal direction in FIG. 19). Further, the claw holding portion 19 can fix the position of each claw 18 while holding the gear 30 between the two claws 18 .
  • the portion (flat portion 37 in the embodiment) with which the pawl 18 abuts may be, for example, a concave shape or a shape combining a concave shape and a convex shape.
  • the driving portion that rotates the movable shaft 13 is not limited to the jig motor 12 .
  • a drive unit that rotates the movable shaft 13 for example, power supplied from an external drive source may be used, or a hand-cranked gear mechanism may be used.
  • Gear mounting system 10: Gear mounting jig, 11: Guide shaft, 11a: First threaded portion, 12: Jig motor, 13: Movable shaft, 14: Threaded portion, 14a: Second threaded portion, 18: Claw, 19: Claw holding portion, 20: Motor, 22: Motor shaft, 24: Key, 26: Shaft screw hole, 30, 30A, 30B, 30C: Gear, 31: Shaft hole, 32: Base portion 33: Gear portion 34: Fitting portion 35: Non-fitting portion 36: Key groove 37: Flat portion

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
PCT/JP2022/001639 2022-01-18 2022-01-18 モータユニット構造、ギヤ取付用治具及びモータシャフトのギヤ取付方法 Ceased WO2023139656A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN202280084975.XA CN118435502A (zh) 2022-01-18 2022-01-18 马达单元构造、齿轮安装用夹具及马达轴的齿轮安装方法
US18/724,913 US20250105700A1 (en) 2022-01-18 2022-01-18 Motor unit structure, tool for gear attachment, and method for attaching gear to motor shaft
DE112022005326.7T DE112022005326T5 (de) 2022-01-18 2022-01-18 Motoreinheit-Struktur, Werkzeug zur Zahnradanbringung und Verfahren zum Anbringen eines Zahnrads an einer Motorwelle
PCT/JP2022/001639 WO2023139656A1 (ja) 2022-01-18 2022-01-18 モータユニット構造、ギヤ取付用治具及びモータシャフトのギヤ取付方法
JP2023574913A JPWO2023139656A1 (https=) 2022-01-18 2022-01-18
TW111149451A TW202345492A (zh) 2022-01-18 2022-12-22 馬達單元構造、齒輪安裝用治具及馬達軸心的齒輪安裝方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/001639 WO2023139656A1 (ja) 2022-01-18 2022-01-18 モータユニット構造、ギヤ取付用治具及びモータシャフトのギヤ取付方法

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US (1) US20250105700A1 (https=)
JP (1) JPWO2023139656A1 (https=)
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WO (1) WO2023139656A1 (https=)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH072641U (ja) * 1993-06-11 1995-01-13 株式会社スギノマシン 回転軸末端への部品の固定機構
JP2004139650A (ja) * 2002-10-16 2004-05-13 Sharp Corp ターンテーブル圧入装置
JP2004232651A (ja) * 2003-01-28 2004-08-19 Nippon Keiki Works Ltd 小形モータの軸受圧入方法
JP3608295B2 (ja) * 1996-06-11 2005-01-05 株式会社デンソー モータシャフトのギア取付方法及びギア取付用治具
JP2010187460A (ja) * 2009-02-12 2010-08-26 Nippon Densan Corp サーボユニット
JP2018019521A (ja) * 2016-07-28 2018-02-01 ナブテスコ株式会社 ギア装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067614B (de) 1958-02-20 1959-10-22 Telefunken Gmbh Vakuummessgeraet und Verfahren zu seiner Herstellung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH072641U (ja) * 1993-06-11 1995-01-13 株式会社スギノマシン 回転軸末端への部品の固定機構
JP3608295B2 (ja) * 1996-06-11 2005-01-05 株式会社デンソー モータシャフトのギア取付方法及びギア取付用治具
JP2004139650A (ja) * 2002-10-16 2004-05-13 Sharp Corp ターンテーブル圧入装置
JP2004232651A (ja) * 2003-01-28 2004-08-19 Nippon Keiki Works Ltd 小形モータの軸受圧入方法
JP2010187460A (ja) * 2009-02-12 2010-08-26 Nippon Densan Corp サーボユニット
JP2018019521A (ja) * 2016-07-28 2018-02-01 ナブテスコ株式会社 ギア装置

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CN118435502A (zh) 2024-08-02
TW202345492A (zh) 2023-11-16
JPWO2023139656A1 (https=) 2023-07-27
US20250105700A1 (en) 2025-03-27
DE112022005326T5 (de) 2024-09-05

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