Electric motor and method for manufacturing electric motor

Abstract

The present invention relates to an electric motor and a method for manufacturing the electric motor. An electric motor that facilitates the process of manufacturing the electric motor. The electric motor comprises: a substrate on which electronic components are mounted; a first connector, which is a first connector provided on a stator and is used to receive a power signal input to a coil and a communication signal for communicating with the electronic components; and a wiring structure, which connects the electronic components to the first connector in a manner capable of communicating. The wiring structure comprises: a second connector, which is mounted on the substrate; and a third connector, which is a third connector fixed to the stator and is connected to the second connector by moving the substrate toward the stator in order to mount the substrate on the stator.

Description

Technical Field

[0001] The present invention relates to a motor having a connector to which a power signal is input and a method for manufacturing the motor. Background Art

[0002] A motor having a connector to which a power signal is input is known (for example, Japanese Patent Application Laid-Open No. 2015-185420). Conventionally, there has been a demand for a technique to simplify the process of manufacturing a motor. Summary of the invention

[0003] Problem that the invention aims to solve

[0004] The present invention seeks a technique for simplifying the process of manufacturing a motor.

[0005] Solutions for solving problems

[0006] In a technical solution disclosed herein, an electric motor comprises: a stator having a coil; a substrate mounted on an axial end of the stator and having electronic components mounted thereon; a first connector disposed on the stator and used to receive a power signal input to the coil and a communication signal for communicating with the electronic components; and a wiring structure that connects the electronic components to the first connector in a manner capable of communicating.

[0007] The wiring structure includes: a second connector mounted on the substrate; and a third connector fixed to the stator and connected to the second connector by moving the substrate toward the stator in order to mount the substrate on the stator.

[0008] The above-mentioned motor may further include a rotation detector for detecting the rotation of the motor, and the electronic component may include an IC chip for transmitting information on the rotation detected by the rotation detector to the first connector as the communication signal.

[0009] For the above-mentioned electric motor, it may also be that the stator has: a stator core, the coil is wound on the stator core; a stator case, which is arranged at the axial end of the stator core; and a supporting member, which is a supporting member installed on the stator case from the side opposite to the stator core, and has a substrate mounting portion for mounting the substrate and a connector mounting portion for fixing the third connector.

[0010] For the above-mentioned electric motor, the wiring structure may also include: a fourth connector, which is arranged on the supporting member in a manner facing the stator case; and a fifth connector, which is arranged on the stator case in a manner facing the supporting member, and is connected to the fourth connector by utilizing the action of moving the supporting member toward the stator case in order to install the supporting member on the stator case.

[0011] For the above-mentioned electric motor, the stator may also include: a stator core on which the coil is wound; and a stator case which is provided at an axial end of the stator core and has a substrate mounting portion for mounting the substrate and for configuring the third connector.

[0012] In another aspect of the present disclosure, in a method for manufacturing a motor for manufacturing a motor, a second connector and a third connector are connected while a substrate is moved toward a stator, thereby mounting the substrate on the stator.

[0013] Effects of the Invention

[0014] According to the present disclosure, the second connector and the third connector can be connected while the substrate is moved toward the support member to mount the substrate on the support member. According to this structure, the operation of connecting the second connector and the third connector can be facilitated in the manufacturing process of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a block diagram of a mechanical system according to one embodiment.

[0016] Figure 2 This is an exploded view of a motor according to one embodiment.

[0017] Figure 3 yes Figure 2 The front view of the motor is shown.

[0018] Figure 4 yes Figure 3 The motor is shown in a partial cross-sectional view and is from Figure 3 The figure is obtained by observing the arrow C in FIG.

[0019] Figure 5 This is an exploded view of a motor according to one embodiment.

[0020] Figure 6 yes Figure 5 The front view of the motor is shown.

[0021] Figure 7 yes Figure 6 The motor is shown in a partial cross-sectional view and is from Figure 6 The figure is obtained by observing the arrow D in FIG.

[0022] Figure 8 is a block diagram of a mechanical system according to another embodiment. DETAILED DESCRIPTION

[0023] Hereinafter, the embodiments of the present disclosure will be described in detail based on the accompanying drawings. In addition, in the various embodiments described below, the same elements are marked with the same figure marks, and repeated descriptions are omitted. In addition, in the following description, the axial direction represents the direction along the rotation axis A of the motor, the radial direction represents the radius direction of a circle centered on the axis A, and the circumferential direction represents the circumferential direction of the circle. In addition, in the following description, for convenience, the direction indicated by the arrow B in the figure is referred to as the axial front.

[0024] Reference Figure 1 , a mechanical system 10 of an embodiment is described. The mechanical system 10 is, for example, a machine tool system for processing a workpiece. The mechanical system 10 includes a control device 12 and a motor 20. The control device 12 is a computer having a processor (CPU, GPU, etc.) and a memory (ROM, RAM, etc.), and is used to control the operation of the motor 20.

[0025] In the present embodiment, the motor 20 is a servo motor, which includes a rotor 22, a stator 24, a rotation detector 26, a substrate 28, and a connector 30. The rotor 22 is arranged radially inside the stator 24 so as to be rotatable around the axis A. The rotor 22 has a rotating shaft 32 and a rotor core 34. The rotating shaft 32 extends straight in the axial direction. A tool, for example, is installed at the axial front end of the rotating shaft 32. The rotor core 34 has a plurality of magnets (not shown) built in and is fixedly arranged radially outside the rotating shaft 32.

[0026] The stator 24 includes a stator core 36, a coil 38, and a stator housing 40. The stator core 36 is hollow and is composed of a plurality of magnetic steel plates stacked in the axial direction. A plurality of teeth 36a arranged in the circumferential direction are formed at the radial inner end of the stator core 36. The coil 38 is wound around the teeth 36a.

[0027] The stator case 40 is provided at the axial rear end of the stator core 36 so as to close the interior of the stator core 36. The stator case 40 has a through hole 41 formed at its center. The axial rear end of the rotating shaft 32 passes through the through hole 41 and protrudes axially rearward of the stator case 40.

[0028] The rotation detector 26 is arranged at the axial rear side of the stator core 36, and is used to detect the rotation (e.g., rotation position, rotation angle) of the rotor 22 of the motor 20. In the present embodiment, the rotation detector 26 is a rotary encoder having a light emitting element (LED, etc.) 42, a light receiving element (photoelectric conversion element, etc.) 44, and a rotating slit 46.

[0029] The light emitting element 42 emits light (e.g., laser light) L toward the light receiving element 44, and the light receiving element 44 receives the light L. The rotating slit 46 is disposed between the light emitting element 42 and the light receiving element 44, and is fixed to the axial rear end portion of the rotating shaft 32 so as to rotate integrally with the rotating shaft 32.

[0030] The rotating slit 46 has a slit for patterning the light L from the light emitting element 42, and the light L is patterned by passing through the slit and propagates toward the light receiving element 44. The light receiving element 44 receives the patterned light L and performs photoelectric conversion, thereby transmitting an electrical signal corresponding to the light L to an IC chip 48a described later.

[0031] The substrate 28 is mounted on the axial rear end of the stator 24. A circuit 52 (so-called printed circuit board: PCB) is mounted on the substrate 28, and various electronic components 48 (IC chip, resistor, inductor, capacitor, etc.) are electrically connected by wiring 50 (printed wiring). In the present embodiment, the electronic component 48 has an IC chip 48a for performing signal processing. The IC chip 48a obtains information about the rotation of the rotor 22 from the electrical signal received by the light receiving element 44, and transmits the information about the rotation to the connector 30 as a communication signal CS1.

[0032] The connector 30 (first connector) is fixedly provided on the stator 24. The cable 54 is inserted and removed from the connector 30, and the connector 30 and the control device 12 are connected in a communication manner via the cable 54. The cable 54 is a composite cable, and the composite cable has, for example, a plurality of types of conductors and a sheath surrounding the plurality of types of conductors. The connector 30 receives the communication signal CS1 from the IC chip 48a, and transfers the communication signal CS1 to the control device 12 via the cable 54.

[0033] Meanwhile, the control device 12 transmits a command to the IC chip 48a as a communication signal CS2 to the connector 30 via the cable 54. The command transmitted by the control device 12 to the IC chip 48a includes, for example, a command for starting and stopping the rotation detection of the motor 20 by the rotation detector 26.

[0034] The connector 30 receives the communication signal CS2 from the control device 12 and transfers it to the IC chip 48a. In addition, the control device 12 sends the power signal PS for driving the motor 20 to the connector 30 via the cable 54. The connector 30 receives the power signal PS from the control device 12 and inputs it to the coil 38. The power signal PS is, for example, a three-phase AC signal, and the power signal PS is used to drive the rotor 22 to rotate.

[0035] Here, the motor 20 includes a wiring structure 56 that connects the electronic component 48 and the connector 30 so that they can communicate. Figure 2 to Figure 4 , the detailed structure of the motor 20 will be described. Figure 2 to Figure 4 The illustrated motor 20A is one embodiment of the motor 20. In the motor 20A, the rotation detector 26 is not shown in the figure for easy understanding.

[0036] The stator 24A of the motor 20A includes a stator core 36, a coil 38 ( Figure 1 ), stator housing 40A and support member 58. Stator housing 40A is a flat plate-like member, and is arranged in contact with the axial rear end surface of stator core 36. Through hole 41 and through hole 60 are formed in stator housing 40A. Through hole 60 is substantially rectangular and is arranged radially outside through hole 41.

[0037] The support member 58 is mounted on the stator housing 40A from the side opposite to the stator core 36 (i.e., the axial rear side). The support member 58 includes a cylindrical portion 62, a substrate mounting portion 64, a connector mounting portion 66, and a pair of mounting flanges 68. The cylindrical portion 62 is arranged in a manner substantially concentric with the rotating shaft 32 with the axis A as a reference, and the above-mentioned rotation detector 26 is accommodated inside the cylindrical portion 62. A hole 62a is formed in the cylindrical portion 62 to divide the cylindrical portion 62 in the circumferential direction. The substrate mounting portion 64 is formed at the axial rear end portion of the cylindrical portion 62. In the present embodiment, the substrate mounting portion 64 has a concave shape into which the substrate 28 can be embedded.

[0038] The connector mounting portion 66 is disposed in the hole 62a of the cylindrical portion 62 so as to protrude radially outward from the cylindrical portion 62 and is formed integrally with the cylindrical portion 62. The connector 70 and the connector 72 are fixed to the connector mounting portion 66. The connector 70 (third connector) protrudes axially rearward from the end surface on the axial rear side of the connector mounting portion 66 and is oriented axially rearward. On the other hand, as shown in FIG. Figure 4 As shown, the connector 72 (fourth connector) is disposed inside the connector mounting portion 66 and is oriented so as to face the axial front (ie, the stator housing 40A). The connector 72 is electrically connected to the connector 70 .

[0039] The mounting flange 68 is formed integrally with the cylindrical portion 62 so as to protrude radially outward from the cylindrical portion 62. A fastening hole 68a is formed in each of the pair of mounting flanges 68. When the support member 58 is mounted on the stator housing 40A, a fastener (bolt, etc.) is passed through the fastening hole 68a, and the fastener is fastened to a fastening hole 69 ( Figure 2 ), the support member 58 is fixed to the stator housing 40A.

[0040] In the present embodiment, the connector 30 is provided on the outer surface of the stator core 36 and is oriented so as to face radially outward. Figure 4 As shown, a power base plate 74 is fixed inside the stator core 36. The power base plate 74 is an annular flat plate member and is fixed to the stator core 36 by, for example, soldering.

[0041] A circuit (not shown) is installed on the power substrate 74, and the circuit has wiring (printed wiring) for supplying the power signal PS to the coil 38. The lead wires drawn from the coil 38 are electrically connected to the wiring of the power substrate 74. For example, when the power signal PS is a three-phase AC signal, the wiring of the power substrate 74 has: U-phase power transmission wiring for supplying a U-phase power signal to the U-phase coil 38, V-phase power transmission wiring for supplying a V-phase power signal to the V-phase coil 38, and W-phase power transmission wiring for supplying a W-phase power signal to the W-phase coil 38.

[0042] The connector 30 and the circuit installed on the power substrate 74 are electrically connected by a connector 76 connected to the connector 30 and a connector 77 installed on the power substrate 74. The power signal PS input to the connector 30 is sent to the wiring (U-phase, V-phase, W-phase power transmission wiring) of the power substrate 74 via the connector 76 and the connector 77, and is input to the coil 38 (U-phase, V-phase, W-phase coil) via the wiring. In addition, the connector 78 is installed on the power substrate 74.

[0043] The connector 78 (fifth connector) is electrically connected to the circuit mounted on the power substrate 74 and is provided so as to protrude axially rearward from the power substrate 74. The connector 78 is oriented so as to face axially rearward (i.e., the support member 58) and is disposed in the through hole 60 of the stator case 40A so as to protrude axially rearward through the through hole 60 of the stator case 40A. Figure 3 and Figure 4 As shown, in a state where the support member 58 is mounted on the stator case 40A, the connector 78 is connected to the connector 72 provided on the support member 58 .

[0044] like Figure 2 As shown, in this embodiment, the substrate 28 is an annular flat plate member, and the circuit 52 and the connector 80 are mounted thereon. The connector 80 (second connector) is electrically connected to the wiring 50 of the circuit 52 and is electrically connected to the electronic component 48 via the wiring 50.

[0045] The connector 80 is oriented axially forward (ie, toward the support member 58). Figure 3 and Figure 4 In the state shown, the connector 80 is connected to the connector 70 provided on the support member 58. Figure 2 to Figure 4 Although not shown in the figure, the circuit 52 is mounted on the axial front side of the substrate 28.

[0046] As above, in Figure 3 and Figure 4 In the state shown, the connector 30 and the electronic component 48 mounted on the substrate 28 are connected in a manner capable of communicating with each other via the connector 76, the connector 77, the circuit of the power substrate 74, the connector 78, the connector 72, the connector 70, and the connector 80. Therefore, in the present embodiment, the connector 76, the connector 77, the circuit of the power substrate 74, the connector 78, the connector 72, the connector 70, and the connector 80 constitute the wiring structure 56A.

[0047] Next, the manufacturing method of the motor 20A is described. First, the manufacturer prepares: the substrate 28 on which the circuit 52 is mounted, the support member 58 provided with the connector 70 and the connector 72, the stator housing 40A, the power substrate 74 on which the circuit, the connector 77 and the connector 78 are mounted, and the stator core 36 provided with the connector 30 and the connector 76.

[0048] Next, the manufacturer fixes the power substrate 74 to the stator core 36 by, for example, soldering, while connecting the connector 77 to the connector 76. Next, the manufacturer (or robot) moves the stator case 40A axially forward toward the stator core 36 to insert the connector 78 into the through hole 60, and fixes the stator case 40A to the stator core 36 by fasteners (bolts, etc.).

[0049] Next, the manufacturer (or robot) arranges the support member 58 on the axial rear side of the stator housing 40A so that the connector 72 and the connector 78 face each other axially, and moves the support member 58 axially forward toward the stator housing 40A so that the support member 58 contacts the stator housing 40A.

[0050] By moving the support member 58 toward the stator case 40A, the connector 72 and the connector 78 are connected in the axial direction. Then, the manufacturer (or robot) passes the fastener through the fastening hole 68a and fastens it to the fastening hole 69 ( Figure 2 ) In this way, the support member 58 is mounted on the stator case 40A.

[0051] Next, the manufacturer (or robot) arranges the substrate 28 on the axial rear side of the supporting member 58 in a manner that the connector 80 and the connector 70 face each other axially, and moves the substrate 28 axially forward toward the supporting member 58 so that the substrate 28 is embedded in the substrate mounting portion 64 of the supporting member 58.

[0052] By moving the substrate 28 toward the support member 58, the connector 80 is connected to the connector 70 in the axial direction. Then, the manufacturer (or robot) fixes the substrate 28 to the support member 58 using fasteners (bolts, etc.). In this way, the substrate 28 is mounted on the substrate mounting portion 64 of the support member 58.

[0053] As described above, the motor 20A includes the wiring structure 56A that connects the electronic component 48 and the connector 30 in a communicable manner, and the wiring structure 56A includes the connector 76, the connector 77, the circuit of the power substrate 74, the connector 78, the connector 72, the connector 70, and the connector 80. The communication signal CS1 transmitted by the IC chip 48a is input to the connector 30 via the wiring structure 56A, and is transferred in the connector 30 and transmitted to the control device 12. On the other hand, the communication signal CS2 input from the control device 12 to the connector 30 is transferred in the connector 30 and transmitted to the IC chip 48a via the wiring structure 56A.

[0054] The wiring structure 56A allows the connector 80 to be connected to the connector 70 while the substrate 28 is moved toward the support member 58 in order to attach the substrate 28 to the support member 58. This structure facilitates the connection operation of the connector 80 and the connector 70 in the manufacturing process of the motor 20A. In addition, since the connection operation can be performed by a robot, the manufacturing process can be automated.

[0055] In addition, the wiring structure 56A includes connectors 76 and 77, connectors 78 and 72, and connectors 70 and 80 that can be inserted and removed from each other, but does not include a cable (more specifically, a flexible wire). With this structure, it is possible to eliminate the worry about the cable being disconnected, and to improve the reliability and noise resistance of communication and increase the speed of communication.

[0056] In addition, the wiring structure 56A allows the connector 72 to be connected to the connector 78 while the support member 58 is moved toward the stator case 40A in order to attach the support member 58 to the stator case 40A. This structure facilitates the connection operation between the connector 72 and the connector 78, and since the connection operation can be performed by a robot, the manufacturing process can be automated.

[0057] Next, refer to Figure 5 to Figure 7 The motor 20B is described. The motor 20B is another embodiment of the motor 20. In addition, for the sake of easy understanding, the rotation detector 26 is not shown in the motor 20B. The stator 24B of the motor 20B has a stator core 36, a coil 38 ( Figure 1) and stator housing 40B.

[0058] The stator housing 40B includes a plate portion 82, a cylindrical portion 84, and a substrate mounting portion 86. The plate portion 82 is a flat plate-shaped member and is disposed in contact with the axial rear end surface of the stator core 36. A through hole 41 ( Figure 7 ) and a through hole 83. The through hole 83 is substantially rectangular and is arranged radially outside the through hole 41. The cylindrical portion 84 is formed integrally with the plate portion 82 in a manner protruding axially rearward from the plate portion 82.

[0059] The cylindrical portion 84 is arranged in a manner substantially concentric with the rotating shaft 32 with the axis A as a reference, and the above-mentioned rotation detector 26 is accommodated inside the cylindrical portion 84. A hole 84a is formed in the cylindrical portion 84 to divide the cylindrical portion 84 in the circumferential direction. The hole 84a is connected to the through hole 83 in the axial direction. The substrate mounting portion 86 is formed at the axial rear end portion of the cylindrical portion 84. In the present embodiment, the substrate mounting portion 86 has a concave shape that can be embedded with the substrate 28.

[0060] As with the above-mentioned motor 20A, Figure 7 As shown, a power substrate 74 is fixed inside the stator core 36, a connector 77 is mounted on the axial front side of the power substrate 74, and a connector 88 is mounted on the axial rear side of the power substrate 74. The connector 88 (third connector) is fixed relative to the stator core 36 via the power substrate 74. The connector 88 is electrically connected to the circuit mounted on the power substrate 74, and is provided in a manner protruding axially rearward from the power substrate 74.

[0061] The connector 88 is oriented toward the axial rear (i.e., the substrate 28), and its top end passes through the through hole 83 of the plate portion 82 and protrudes toward the axial rear of the plate portion 82. The connector 88 is arranged relative to the stator housing 40B in a manner to be accommodated in the hole 84a of the cylindrical portion 84. Figure 6 and Figure 7 As shown, in a state where the substrate 28 is mounted on the substrate mounting portion 86 of the stator case 40B, the connector 80 is connected to a connector 88 arranged in the hole 84 a of the stator case 40B.

[0062] As above, in Figure 6 and Figure 7 In the state shown, the connector 30 and the electronic component 48 mounted on the substrate 28 are connected to each other in a communicative manner via the connector 76, the connector 77, the circuit of the power substrate 74, the connector 88, and the connector 80. Therefore, in the present embodiment, the connector 76, the connector 77, the circuit of the power substrate 74, the connector 88, and the connector 80 constitute the wiring structure 56B.

[0063] Next, a method for manufacturing the motor 20B is described. First, the manufacturer prepares: the substrate 28 on which the circuit 52 is mounted, the stator case 40B, the power substrate 74 on which the circuit, the connector 77 and the connector 88 are mounted, and the stator core 36 provided with the connector 30 and the connector 76. Then, the manufacturer fixes the power substrate 74 to the stator core 36 by, for example, soldering, while the connector 77 is connected to the connector 76.

[0064] Next, the manufacturer (or robot) moves the stator case 40B axially forward toward the stator core 36 to insert the connector 88 into the through hole 83 and the hole 84a, and fixes the stator case 40B to the stator core 36 using fasteners (bolts, etc.). Next, the manufacturer (or robot) arranges the substrate 28 on the axial rear side of the stator case 40B so that the connector 80 and the connector 88 face each other in the axial direction, and moves the substrate 28 axially forward toward the stator case 40B to fit the substrate 28 into the substrate mounting portion 86 of the stator case 40B.

[0065] By moving the substrate 28 toward the stator case 40B, the connector 80 is connected to the connector 88. Then, the manufacturer (or robot) fixes the substrate 28 to the stator case 40B using fasteners (bolts, etc.). In this way, the substrate 28 is mounted on the substrate mounting portion 86 of the stator case 40B.

[0066] As described above, the motor 20B includes the wiring structure 56B that connects the electronic component 48 and the connector 30 in a communicable manner, and the wiring structure 56B includes the connector 76, the connector 77, the circuit of the power substrate 74, the connector 88, and the connector 80. The control device 12 can communicate with the electronic component 48 by using the wiring structure 56B to communicate the communication signal CS1 and the communication signal CS2.

[0067] The wiring structure 56B allows the connector 80 to be connected to the connector 88 while the substrate 28 is moved toward the stator case 40B in order to attach the substrate 28 to the stator case 40B. This structure facilitates the connection operation of the connector 80 and the connector 88 in the manufacturing process of the motor 20B. In addition, since the connection operation can be performed by a robot, the manufacturing process can be automated.

[0068] In addition, the wiring structure 56B has connectors 76 and 77, connectors 88 and 80 that can be inserted and removed from each other, but does not have a cable (flexible wire). With this structure, the worry about the disconnection of the cable can be eliminated, and the reliability and noise resistance of communication can be improved, and the communication speed can be increased.

[0069] In addition, in this embodiment, the substrate 28 is mounted on the substrate mounting portion 86 formed integrally with the stator case 40B. With this structure, the number of parts of the motor 20B can be reduced. Therefore, the manufacturing process of the motor 20B can be simplified and the manufacturing cost can be reduced.

[0070] In addition, the rotation detector 26 is not limited to a rotary encoder, and may be a rotation detector having a Hall element, for example. In this case, the Hall element of the rotation detector 26 transmits an electrical signal corresponding to a rotating magnetic field generated by the rotation of the rotor 22 to the IC chip 48a. The IC chip 48a obtains information about the rotation of the rotor 22 from the electrical signal from the Hall element, and transmits the information about the rotation to the connector 30 as a communication signal CS1.

[0071] In addition, the power substrate 74 may be fixed relative to the stator case 40A (or 40B) in a manner sandwiched between the stator core 36 and the stator case 40A (or the plate portion 82). In addition, the connector 76 and the connector 77 may be omitted from the motor 20A and the connector 30 may be connected to the circuit of the substrate 74 using a cable or the like.

[0072] Alternatively, the connector 72 and the connector 78 may be omitted from the motor 20A, and the circuit of the power substrate 74 may be connected to the connector 70 by using a cable or the like. Alternatively, the power substrate 74 may be omitted from the motor 20A, and the connector 30 may be connected to the connector 70 by using a cable or the like. In this case, the connection operation between the connector 80 and the connector 70 can be facilitated. Similarly, the power substrate 74 may be omitted from the motor 20B, and the connector 88 may be fixedly provided on the plate portion, and the connector 30 may be connected to the connector 88 by using a cable or the like.

[0073] In addition, for the motors 20A and 20B, the substrate 28 may be configured to be mounted, for example, radially relative to the substrate mounting portion 64 or 86. For example, the substrate mounting portion 64 or 86 may have a groove for accommodating the substrate 28 so that the substrate 28 can slide radially, and the substrate 28 may be configured to be inserted into the substrate mounting portion 64 or 86 by sliding radially in the groove of the substrate mounting portion 64 or 86. In this case, the connector 80 may be oriented so that it can be inserted and removed radially relative to the connector 70 or 88.

[0074] In addition, the electric motor 20 (20A, 20B) may further include a braking mechanism. Figure 8 Such a form is shown in FIG. Figure 8The motor 20 shown in the figure is provided with a brake mechanism 90. The brake mechanism 90 is used to brake the rotor 22. Specifically, the brake mechanism 90 has a brake core 92, an exciting coil 94, a biasing member 96, an armature 98, an end plate 100, and a brake disc 102.

[0075] The brake core 92 is made of, for example, a magnetic material (iron, etc.). The excitation coil 94 is housed in the brake core 92 and is connected to the brake power supply 104. The brake power supply 104 applies a voltage to the excitation coil 94. The force applying member 96 is an elastic member such as a coil spring, which applies force to the armature 98 in the direction toward the brake disc 102. The armature 98 is made of a magnetic material and is provided to be movable in the axial direction in a manner that it selectively contacts and separates from the brake disc 102.

[0076] The end plate 100 is arranged at a position separated from the armature 98 in the axial direction. The end plate 100 is fixed to the brake core 92 by means of fasteners such as bolts (not shown). The brake disc 102 is a disc-shaped member arranged with the axis A as the center, and is provided on the rotating shaft 32 in a manner that it cannot move relative to the rotating shaft 32 in the circumferential direction, and rotates together with the rotating shaft 32. The brake disc 102 is arranged between the armature 98 and the end plate 100.

[0077] When the brake power source 104 applies voltage to the exciting coil 94, the brake core 92 is excited, and the armature 98 is attracted to the brake core 92 by the magnetic force against the biasing force of the biasing member 96. As a result, the armature 98 is separated from the brake disc 102, and the braking action performed by the brake mechanism 90 is released.

[0078] On the other hand, when the brake power source 104 stops applying voltage to the exciting coil 94, the excitation of the brake core 92 is released, and the magnetic force that attracts the armature 98 to the brake core 92 disappears. As a result, the armature 98 is pressed and abutted against the brake disc 102 by the action of the biasing member 96, and the brake disc 102 is clamped between the armature 98 and the end plate 100. As a result, the brake mechanism 90 brakes the rotor 22.

[0079] In the present embodiment, the electronic component 48 has an IC chip 48b for operating the brake mechanism 90. The control device 12 transmits information of a command to the IC chip 48b as a communication signal CS3 via the cable 54 to the connector 30. The communication signal CS3 input to the connector 30 is transmitted to the IC chip 48b via the wiring structure 56 (56A, 56B).

[0080] The IC chip 48b activates the brake power supply 104 according to the communication signal CS2 from the control device 12, thereby causing the brake mechanism 90 to perform a braking action or release the braking action. On the other hand, the IC chip 48b transmits the state information of the brake mechanism 90 (for example, information indicating the on / off of the braking action, information indicating the time delay of the braking action, etc.) as a communication signal CS4 to the connector 30 via the wiring structure 56 (56A, 56B). The connector 30 forwards the communication signal CS4 and transmits it to the control device 12.

[0081] In addition, the motor 20 may be provided with a brake mechanism 90 instead of the rotation detector 26. In addition, the motor 20 may be provided with any device different from the rotation detector 26 and the brake mechanism 90. In this case, the electronic component 48 may communicate the communication signal CS with the connector 30 and the control device 12 via the wiring structure 56 (56A, 56B) according to the electrical signal from the device. As mentioned above, the present disclosure has been described using the embodiments, but the above embodiments are not limited to the invention involved in the claims.

Claims

1. An electric motor, characterized in that: The motor has: a stator having a coil; a substrate, which is mounted on an axial end of the stator and has electronic components mounted thereon; a first connector provided on the stator and used for receiving a power signal input to the coil and a communication signal for communicating with the electronic component; as well as a wiring structure that connects the electronic component and the first connector in a communicable manner, The wiring structure has: a second connector mounted on the substrate; as well as a third connector fixed to the stator and connected to the second connector by moving the substrate toward the stator in order to mount the substrate on the stator, The wiring structure transmits the communication signal through the second connector and the third connector, but does not transmit the power signal input to the coil.

2. The electric motor according to claim 1, characterized in that The motor further includes a rotation detector for detecting the rotation of the motor. The electronic component includes an IC chip configured to transmit information on the rotation detected by the rotation detector to the first connector as the communication signal.

3. The electric motor according to claim 1 or 2, characterized in that: The stator has: a stator core, on which the coil is wound; a stator housing provided at an axial end of the stator core; and The support member is mounted on the stator case from the side opposite to the stator core, and includes a substrate mounting portion on which the substrate is mounted and a connector mounting portion on which the third connector is fixed.

4. The electric motor according to claim 3, characterized in that The wiring structure has: a fourth connector provided on the support member so as to face the stator case; and The fifth connector is disposed on the stator case so as to face the support member, and is connected to the fourth connector by moving the support member toward the stator case in order to attach the support member to the stator case.

5. The electric motor according to claim 1 or 2, characterized in that: The stator has: a stator core around which the coil is wound; and The stator case is provided at an axial end portion of the stator core, has a substrate mounting portion for mounting the substrate, and is provided with the third connector.

6. A method for manufacturing an electric motor, the method being a method for manufacturing the electric motor according to any one of claims 1 to 5, characterized in that: In this method of manufacturing the electric motor, the second connector and the third connector are connected while the substrate is moved toward the stator, thereby mounting the substrate on the stator.

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