JP2013258821A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a motor thin while ensuring the motor characteristics, by ensuring the core lamination thickness and making other part as thin as possible, and to provide means for fixing the lead wires, from a bobbin having a coil wound thereabout to a crossover wire, reliably.SOLUTION: A bobbin having a coil wound thereabout is secured to the teeth of a stator core, and a bobbin holder is provided on the upper surface of core back of the stator core. Lead wires from the coil are laid on the bobbin holder of a motor to which the bobbin is secured via a fitting part to the bobbin holder, and the lead wires are fixed by providing a narrow part substantially equal to the wire size of the lead wire.

Description

  The present invention relates to a motor having a configuration in which a coil is wound around a bobbin.

  In a conventional motor, for example, Patent Document 1 discloses a configuration in which a notch is provided in a bobbin itself and the coil is connected to a terminal with a bus ring as a power supply line therebetween (conventional example 1).

  Further, as an outer rotor type motor, for example, Patent Document 2 discloses a configuration in which a jumper wire is installed inside a stator winding (stator coil) (conventional example 2).

JP 2006-67799 A JP 2011-217425 A

  In Conventional Example 1, the part where the motor bus ring (corresponding to the “crossover wire” in the present invention and Conventional Example 2) is arranged is the bobbin part at the top of the stator core, and is erected in the axial direction of the stator. It has become a state. Accordingly, since the thickness of these connecting wire portions is added in addition to the thickness of the stator core, the dimension of the stator portion in the stacking thickness direction is 1.5 to nearly twice the core thickness.

  On the other hand, the use of the motor of the present invention is, for example, an elevator hoisting machine as in Conventional Example 2, and many of the hoisting machines are arranged in a hoistway, so that a thinning is required. A motor is essential.

  Therefore, in order to reduce the thickness while securing the motor characteristics, it is important to reduce the thickness of the other part without damaging the electromagnetic part. The purpose of this is to make the part as thin as possible and to make it thinner.

  For this reason, since it is necessary to devise the crossover portion so as not to make a business trip in the stacking direction, it is desirable to install the crossover portion at a portion away from the stator core rather than disposing it at the stator core portion. However, since the distance from the bobbin around which the coil is wound to the crossover part becomes long, even if the function of fixing the coil to the bobbin itself as in Conventional Example 1 is provided, it is in the middle from the bobbin to the crossover part. The coil portion, so-called lead wire, is not fixed. Also, Conventional Example 2 does not mention or suggest any lead wire extending from the coil to the crossover. Eventually, this lead wire may come into contact with other parts due to vibration or the like, and the coating may be deteriorated and insulation may be insufficient, which may impair the reliability.

  Therefore, the present invention has an object to obtain the function of securely fixing the lead wire in combination with the thinning.

  The bobbin holder of the motor in which the bobbin around which the coil is wound is disposed in the teeth portion of the stator core, the bobbin holder is fixed to the upper surface of the core back portion of the stator core, and the bobbin is fixed via the bobbin holder and the fitting portion Further, the problem can be solved by laying the lead wire from the coil and fixing the lead wire by providing a narrow portion substantially equal to the wire diameter of the lead wire.

  In the present invention, since the crossover portion of the motor is not disposed in the stator core portion so as not to travel in the direction of the thickness of the stator core, it is disposed at a position away from the stator core portion. This portion can be made as thin as possible, and the motor can be made thinner.

  In addition, with the above configuration, the distance from the bobbin around which the coil is wound to the crossover portion becomes long, but the lead wire from the coil is fixed to the bobbin holder in the core back part in the middle portion to the crossover wire As a result, the vibration of the lead wire is suppressed, and the occurrence of problems such as deterioration of the coating due to contact of the coil with other parts and insufficient insulation can be prevented, thereby improving reliability. Can be planned.

Cross-sectional view of a motor according to an embodiment of the present invention The front view of a part of the stator of the embodiment of the present invention The longitudinal cross-sectional view of the motor of the Example of this invention The top view and front view of a part of the bobbin holder of the embodiment of the present invention The top view and front view which have arrange | positioned the lead wire in a part of bobbin holder of the Example of this invention Part of the bobbin holder and the top view of the bobbin according to the embodiment of the present invention Part of the bobbin holder and a top view and a cross-sectional view of the bobbin according to the embodiment of the present invention

  FIG. 1 shows a cross-sectional view of a motor according to an embodiment of the present invention. FIG. 2 is a front view of a part of the stator according to the embodiment of the present invention. FIG. 3 shows a longitudinal sectional view of a motor according to an embodiment of the present invention. FIG. 4 shows a top view and a front view of a part of the bobbin holder according to the embodiment of the present invention. FIG. 5 shows a top view and a front view in which lead wires are arranged in a part of the bobbin holder of the embodiment of the present invention. FIG. 6 is a top view of a part of the bobbin holder and the bobbin according to the embodiment of the present invention. FIG. 7 shows a top view and a cross-sectional view of a part of the bobbin holder and the bobbin according to the embodiment of the present invention.

  As shown in FIG. 1, the motor of the embodiment of the present invention is a multipolar outer rotor type motor in which the rotor 5 is composed of a rotor core 51 and a permanent magnet 52. A groove is formed in the rotor core 51, and a permanent magnet 52 is arranged there. The stator 6 has a stator core 61 having a tooth 64 forming an open slot and a concentrated winding structure in which a stator coil 62 is applied to the tooth 64, and is divided into a plurality of stator cores at a stator core dividing position 61. A jumper 4 is arranged on the inner diameter side of the stator (this motor is an outer rotor, so the inner diameter side of the stator corresponds to the core back side). As shown in FIG. 3, the connecting wire 4 is provided on substantially the same plane as the stator core surface, and is therefore indicated by a broken line in FIG. 1.

  FIG. 2 shows the appearance of the upper right portion of the cross-sectional view of FIG. A coil 62 is provided in each tooth (not shown), and the vicinity of the stator core back portion of the bobbin 2 around which the coil 62 is wound appears between the bobbin holder 1 and the coil 62. Further, the lead wire 3 from the coil 62 extends from the bobbin and the bobbin holder to the connecting wire 4 shown in FIG.

  As shown in FIG. 3, in the motor of the embodiment of the present invention, a stator 6 comprising a stator core 61 around which a stator coil 62 is wound is press-fitted into a frame 63, and a fixed shaft 65 is press-fitted into the frame 63. A rotor 5 formed by fixing a rotor core 51 provided with a permanent magnet 52 to a shaft 65 is rotatably supported by a bearing 53.

  Here, the bobbin holder 1 is provided on one surface on the inner diameter side of the stator core 61, and the crossover 4 is provided on the frame 63 on the inner diameter side.

  In this embodiment, there are 40 permanent magnets 12 and 48 stator coils 62, and the number of slots versus the number of poles is 48:40, that is, a 12:10 multipole concentrated winding motor.

  Needless to say, the number of slots versus the number of poles can be variously selected in accordance with the number of rotations, output, etc. in the application of the motor, and the examples disclosed in the embodiments are only one example.

  FIG. 4 shows a part of the bobbin holder 1 taken out and its shape is illustrated. An annular partition wall 11 is provided, and protrusions 12 and 13 are formed on the outer periphery of the partition wall 11 so as to protrude between adjacent partition walls. ing. The same applies to the drawings after FIG. 4, but an example is shown in which two protrusions having a shape protruding between adjacent partition walls are provided, but two or more protrusions may be provided on the partition wall 11. A plurality of protrusions may be provided. In addition, a square hole 14 is provided on the bobbin side (lower side in the figure) of the bobbin holder 1.

  In FIG. 4, only a portion where two annular partition walls 11 are provided in the bobbin holder 1 is illustrated. In the configuration shown in FIGS. 1 to 3, the stator core 61 is divided into 6 parts, so that each stator core 61 has 8 teeth. In the embodiment, the bobbin holder 1 has an annular partition wall 11. You will have eight.

  In FIG. 2, the appearance of the bobbin holder 1 has an arc shape. However, in FIG. 4, the bobbin holder 1 is shown in a simplified rectangular shape. However, since this simplified shape does not deviate from the characteristics of the configuration and function of the bobbin holder 1, the bobbin holder 1 is also illustrated in a substantially rectangular parallelepiped shape in the drawings subsequent to FIG.

FIG. 5 is obtained by adding a lead wire 3 of the coil to the configuration shown in FIG.
A narrow portion substantially equal to the wire diameter of the lead wire 3 is formed by the protrusion 12 and the protrusion 13 having a shape protruding between the adjacent partition walls between the outer wall portions of the adjacent partition walls 11, and the lead wire 3 is fixed. . As a result, the lead wire 3 is fixed and disposed so as to be sandwiched and compressed by the narrow portion, and thus the lead wire 3 moves while suppressing the vibration of the lead wire 3 on the bobbin holder 1. This can be prevented.

  Here, as long as the space formed by the outer wall portions of the adjacent partition walls 11 has a shape that forms a narrow portion substantially equal to the wire diameter of the lead wire 3 as described above, the lead wire according to the object of the present invention is provided. It is clear that the shape of the partition wall 11 is not limited to an annular shape as in the embodiment because it has a function of fixing more reliably. For example, the shape of “[]” is an example.

  Further, in this embodiment, the protrusion 13 protrudes only at the upper part, and is formed so that the lead wire 3 is accommodated in the lower part. Therefore, in FIG. 5, when the lead wire 3 is pushed into the narrowed portion, the protrusion 13 is avoided and the left side of the lead wire 3 abuts against the bobbin holder surface, so that the lead wire 3 partially enters the lower portion of the protrusion 13. It is arranged. Thus, by providing the protrusions 12 and 13, the lead wire 3 can be securely fixed and the vibration thereof can be suppressed. Even if there is a single protrusion protruding between the adjacent partition walls, a narrow portion substantially equal to the wire diameter of the lead wire 3 can be formed between the adjacent wall 11 and the outer wall portion. If it does, it will fully function.

FIG. 6 is obtained by adding the bobbin 2 and the stator coil 62 to the configuration of FIG.
The coil 62 is wound around the bobbin 2, and the lead wire 3 of the coil is disposed on the bobbin holder 1 from the coil 62 through the bobbin 2. Two protrusions 21 are provided on the upper portion of the bobbin 2, and the lead wire 3 is disposed so as to be guided by the protrusion 21, thereby facilitating the position management when the lead wire 3 is disposed. .

FIG. 7 shows FIG. 6 as (1) and in addition, (2) as a sectional view.
When the bobbin holder 1 is mounted on the stator core 61, the bolt 15 provided for fixing the stator core 61 to the frame 63 is disposed in a space surrounded by the annular partition wall 11 of the bobbin holder 1, and the bobbin holder 1 is attached to the stator core 61. Therefore, since the bolt 15 is separated from the lead wire 3 by the annular partition wall 11, there is no fear that the lead wire 3 contacts the bolt 15, and there is no fear that the insulation performance of the motor is lowered.

  In the sectional view (2), the bobbin 2 has a structure surrounding the stator core 61. A protrusion 22 is provided at the tip of the bobbin 2 on the inner peripheral side of the stator 6, and this is engaged with the hole 14 of the bobbin holder 1, thereby preventing the bobbin 2 from moving from the stator core 61. That is, the protrusion 22 serves as a fitting portion between the bobbin holder 1 and the bobbin 2.

  In the present invention, the case of the outer rotor type motor has been described with reference to the embodiment. However, the present invention is not limited thereto, and even in the case of the inner rotor type motor, in order to reduce the thickness, a coil and a connecting wire are similarly used. Therefore, it is effective to provide a means for fixing the lead wire in the portion between the crossover and the bobbin. Further, when using the bobbin holder, a means for fixing the lead wire may be provided on the bobbin holder, and the same effect can be obtained.

  The present invention fixes a so-called lead wire that connects the coil and the connecting wire when the motor needs to be thin and the distance between the coil and the connecting wire needs to be increased. It can be used in the intended use.

  In particular, in a machine room-less elevator in which a hoisting machine is arranged in a hoistway where a car goes up and down, this is effective for a thin motor for the hoisting machine.

1 Bobbin holder 11 Bulkhead 12 Projection 13 Projection 14 Hole 15 Bolt 2 Bobbin 21 Projection 22 Projection 3 Lead wire 4 Junction wire 5 Rotor 51 Rotor core 52 Permanent magnet 53 Bearing 6 Stator 61 Stator core 62 Stator coil 63 Frame 64 Teeth 65 Fixed shaft

Claims (8)

A motor that forms a stator coil by disposing a bobbin around which a coil is wound in a tooth portion of a stator core,
A motor characterized in that a lead wire extending from the coil to a connecting wire disposed on the core back side of the stator is fixed by a lead wire fixing member provided between the bobbin and the connecting wire. The motor according to claim 1, wherein
While fixing the bobbin through the fitting portion, provided a bobbin holder fixed to the upper surface of the core back portion of the stator core,
The motor characterized in that the lead wire fixing member is formed in the bobbin holder. The motor according to claim 2, wherein
The motor is characterized in that the lead wire fixing member lays the lead wire in the bobbin holder and fixes the lead wire by a narrow portion formed in the bobbin holder. The motor according to claim 3, wherein
The narrow portion has a size substantially equal to a diameter of the lead wire. The motor according to claim 4, wherein
The narrow portion includes an outer wall portion of a partition wall that surrounds a space for a bolt that fixes the bobbin holder to the core back portion, and one or more protrusions that are provided on the partition wall and project between the adjacent partition walls. A motor characterized by being formed. The motor according to claim 5, wherein
When there are a plurality of the protrusions, they are provided at different positions on the partition wall. The motor according to any one of claims 2 to 6,
The stator core is divided into a plurality of parts, and the bobbin holder is also divided into the same number of divisions. The motor according to any one of claims 1 to 7,
The teeth of the stator core are open slots, and the rotor is an outer rotor type in which a permanent magnet is provided on the outer periphery of the stator.

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