JP6286652B2 - motor - Google Patents

Description

The present invention relates to a motor for fixing a connector in which a metal connector housing and an earth contact are electrically connected, and particularly to attachment of a ground wire.

  In recent years, servo motors for driving FA devices have been strongly demanded for miniaturization of motors due to demands for space saving and miniaturization of devices. The miniaturization of the motor is generally achieved by magnetic circuit design, heat dissipation structure design, heat transfer path design, and the like. In addition, considering the state in which the motor is built into the equipment, not only the motor's cross-sectional dimensions and overall length are reduced, but also the connector and its fixing base for current input are reduced, and the detector cover is reduced. Was also necessary.

On the other hand, as for grounding for the purpose of preventing leakage of the servo motor, it is common to attach one end of the ground wire to the outer shell of the motor by a method such as screwing or welding and ground the other end. As it is easy to externally connected to the ground side, it is also common to mount and connectors typified by cannon plug. When the ground wire attached to the outer shell of the motor is bundled with the motor input current wire and the connector is attached to the ends of the two wires, the contact pin for input current and ground exists in one connector.

Further, like in the motor of waterproof applications, connectors are fixed via a fixing base which is installed in the motor shell, it is also common to place the input current wires and the ground wire to the interior of the fixing table. The A over scan lines in the interior of the fixing table is present, was Tei caused that inhibits the reduction of the fixing base of the dimensions of the connector.

In addition, in order to connect the Rukoto and ground wire attach to the outer shell of the motor to the contacts of the connector ground wire, because Do not require a work space, in the same way, low fixed base of the size of the connector The decline is inhibited.

In the conventional art, the ground wire and the motor input current line constituted by a single flexible cable, by independently only ground wire in the cable connecting apparatus, a method of connecting a separate grounding wire to the ground terminal is proposed (For example, refer to Patent Document 1).

Japanese Examined Patent Publication No. 03-028906

A problem to be solved is the motor method for fixing the connector on the connector fixing table, if the ground wire inside the connector fixing base is present, that you can not reduce the size of the connector fixing base by the presence of ground wire itself It is. Further, when performing work to the connection of Rukoto and ground wire attach to outer shell of the motor to the contacts of the connector ground terminal, it requires a certain space.

The technique disclosed in Patent Document 1 contributes to downsizing by configuring the ground wire and the motor input current wire with a single cabtyre cable . However , since the ground wire is fixed to the housing of the connection device in the cable connection device, there remains a problem that a certain amount of space is required.

The present invention, by omitting the ground wire itself, along with eliminating the space of the ground wire itself, requires ground terminals to work to connect the Rukoto and ground wire attach to outer shell of the motor to the contacts of the connector Space can be reduced.

To achieve the above object, the present invention is the connector fixing base which is fixed to the outer metallic provided in the motor, connector contact for metal connectors housing and ground are electrically connected to fixed in motor, connector is fixed by bolts to the outer periphery of the motor via a connector fixing stand, the use Rutotomoni, a ground wire electrically to connect the outer connector housing and the motor at bolts Without giving the connector contact a grounding function.

The present invention, connector fixing stand connector is fixed is made of a metal, instead of the bolt, taking ground at the connector fixing table.

In the present invention , the portion where the connector housing and the bolt are in contact and the portion where the bolt and the outer shell are in contact are not painted. Alternatively, in the present invention, the portion where the connector and the connector fixing base are in contact and the portion where the connector fixing base and the outer shell are in contact are not painted.

The present invention is contact connected to the co-next-data筺 body is two or more.

According to the present invention, by Rukoto preparative ground via bolts, because it is possible to omit the ground wire from the interior of the connector fixing stand can be reduced the size of the connector fixing base. Further, work and to connect the ground wire and the outline of the motor, work to connect the ground wire to the contacts of the connector is not required. In addition, the cost is reduced by eliminating the ground wire.

The principal part exploded view of the motor with a connector in Embodiment 1 of this invention

Hereinafter, an embodiment embodying the present invention will be described with reference to FIG. FIG. 1 is an exploded view of a connector fixing base and a connector portion of a motor with a connector.

As shown in FIG. 1, a connector 3 is fixed to a motor outer shell 1 by a bolt 4 via a connector fixing base 2. The motor input current cable 5 is connected to the inside of the motor through the hole 6 of the outer shell 1. Motor by inputting an external current from the connector 3, current is driven to flow the input current for the cable 5.

At this time, grounding is required to prevent electric shock due to leakage current. However, in the case of an industrial motor, it is common to connect the ground wire to the outer shell 1 of the motor by screwing or welding and ground the other terminal. Is. For connectorized motor, by connecting the ground wire to one of the contact connector having an input and a ground of the motor current, it can be realized in a single connector.

The motor for waterproofing needs to waterproof the input current cable 5 and the ground wire from the outside, and the connector is fixed via the connector fixing base 2 installed on the outer shell 1 of the motor. Generally, the ground wire is disposed inside the connector fixing base 2. Incidentally, the connector fixing base 2 is not necessarily a metal, Ru can be a resin product created by such molding.

Conventionally, when connecting the contact of the outer Guo and connectors with ground wire, because that must be carried out inside the connector fixing base 2, the space of the ground wire is required, correspondingly connector fixing base The size of 2 needs to be increased. In addition, work space for to connect contactors door of the connector the Rukoto and ground wire attach the ground wire to the outer shell of the motor is required, as well, is to inhibit the reduction of the connector fixed base size.

As shown in FIG. 1, the connector 3 is connected one of the contact 7 is electrically a housing 8 which is composed of metal parts of the connector 3. For example, this connector, such as a round connector JL04V series manufactured by Japan Aviation Electronics Industry Co., Ltd. can be used. Housing 8 of the connector 3, by being fixed to the outer first motor via a connector fixing base 2 by bolts 4, the housing 8 is electrically connected to the outer first motor via the bolts 4.

Incidentally, the housing 8 is to prevent electric shock, it has been coated with an insulator, unpainted for portions in contact with the bolt 4. Thus, the contact 7 housing 8, the bolt 4, electricity and outer first motor connected to because, Ru can have a function as ground terminal. Therefore , no ground wire is required, and the size of the connector fixing base 2 can be reduced.

The connection and the outer one ground wire and the motor, it is possible to omit the work on connection between the contact 7 having a grounding wire and the connector 3, the working space component, reducing the size of the connector fixing base 2 Can do. Further, the cost is reduced by omitting the ground wire and the connection terminal to the outer shell 1 of the motor to which the ground wire is connected .

In particular, the connector fixing base 2 lever creating a metal, instead of the bolt 4, the connector fixing base 2, the outer first contact 7 and the motor can be electrically connected. In this case, the connector fixing base 2, the surface to prevent electric shock should be coated with an insulating material. However, the contact portion of the connector 3 and the connector fixing base 2, the connector fixing base 2 and the contact portions of the outer shell 1 of the motor must not be painted. Thus, the housing 8 of the connector 3 is electrically connected to the outer first motor via a connector fixing base 2, casing 8 and electrically the attached contact 7 have a function as a ground it can.

Incidentally, omitted when creating a connector fixing base 2 with a metal, for example, connector 3 and the connector fixing base 2, and, the outer first connector fixing base 2 and the motor by fixing with an adhesive, a bolt 4 be able to.

The contact 7 that is connected to the housing 8 of the connector 3 need not be one, but may be connected two or more. In this case, the contact 7 is connected to the housing 8, which can also be used as a ground terminal.

As described above, according to the present invention, the ground wire is not required, it can be applied to various motors so attained workability improvement and cost reduction.

DESCRIPTION OF SYMBOLS 1 Outer 2 Connector fixing base 3 Connector 4 Bolt 5 Input current cable 6 Hole 7 Contact 8 Housing

Claims (5)

A fixed connector fixing stand in the outer steel metals, in the motor connector is fixed to the metal connector housing and the ground contacts are electrically connected, wherein the connector through the connector fixing base the outer to the fixed with a bolt, Rutotomoni were electrically connecting the outer and the connector housing by the bolt, the motor to have a grounding function to the grounding contact Te. The connector fixing base which the connector is fixed is made of a metal, instead of the bolt, the motor according to claim 1 taking the ground at the connector fixing base. The motor according to claim 1, wherein a portion where the connector housing and the bolt are in contact and a portion where the bolt and the outer shell are in contact are not painted. The motor according to claim 2, wherein a portion where the connector and the connector fixing base are in contact and a portion where the connector fixing base and the outer shell are in contact are not painted. Wherein said grounding contact connected to connector筺 body motor according to any one of claims 1 2 is two or more.

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