JPH0595168U - Terminal structure of electric motor - Google Patents

Abstract

(57) [Summary] [Purpose] The terminal that electrically connects the inside and outside of the bracket of the electric motor is downsized, and the workability is improved. [Structure] The terminal 9 is made of a solid columnar member, and the insulating member 10 is covered with the same, so that one end side 10a is fitted into the through hole 1a formed in the front bracket 1 in a sealing manner. The diameter of the bracket is made as small as possible, and the workability of bending work for projecting the bracket 1 from the inside to the outside is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a terminal structure of an electric motor used for electric components mounted on a vehicle.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, in this type of electric motor, the terminal provided through the communication hole formed in the bracket is used to wire the inside and outside of the bracket. The one described in Japanese Patent Publication No. 2-39183 has already been proposed and implemented.

By the way, recently, there is a strong demand for miniaturization and high output of electric motors, and this is not an exception for the terminal itself which is a component thereof. On the other hand, conventionally, as shown in FIG. 5, a plate material is punched by a press into a predetermined shape and bent, and a resin-molded terminal is used. In this case, in order to obtain the strength of the resin, the width of the terminal board material is increased. The outer diameter is restricted in the direction, and in such a case, there is a problem that the diameter of the insulating material covering the terminal becomes large, which hinders miniaturization. Moreover, since the terminal is a plate material, the degree of freedom in the bending direction is inevitably low, which may cause work difficulties when connecting the harness, which is a problem.

[0004]

[Means for Solving the Problems]

 The present invention was devised in view of the above circumstances to provide a terminal structure in an electric motor that can eliminate these drawbacks, and a penetrating hole through a bracket. In an electric motor in which the wiring inside and outside the bracket is performed through the attached terminal, the terminal is a solid cylindrical rod material, and both ends are crushed into a flat shape to process the inside of a harness or the like. Alternatively, it is characterized in that it is used as a connection portion for external wiring, and a cylindrical intermediate portion is covered with an insulating material and attached through the through hole.

With this configuration, the present invention makes it possible to reduce the diameter of the insulating material as much as possible and to ensure the degree of freedom in the bending direction.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a front bracket of a starter motor, 2 is a yoke to which the front bracket 1 is integrally fixed by screws 3, and 4 is rotatable between the bottom of the yoke 3 and the front bracket 1. The armature 5 is pivotally supported on the permanent magnet 5, 5 is a permanent magnet integrally fixed to the inner peripheral surface of the yoke 2, 6 is a brush installed in the brush holder 7, and 8 is a commutator with which the brush 6 is slidably contacted. In the meantime, all of these member devices are constructed as usual.

Reference numeral 9 is a terminal embodying the present invention. The terminal 9 is made of a solid cylindrical rod made of copper, and its both ends are flattened by crushing with a press or the like. This is used as the connecting portions 9a and 9b for the harness, the lead wire, and the internal and external wiring such as the pigtail. The intermediate portion is covered with a flexible resin cylindrical insulating material 10, which is further bent into a substantially U-shape. Then, the one end side portion 10a of the terminal 9 covered with the insulating material 10 is sealingly fitted into the through hole 1a formed in the front bracket 1 to form the stopper member 11 integrally fixed to the front bracket 1. It is locked out. Incidentally, 12 is a sealing material.

In the embodiment of the present invention constructed as described above, the inside and outside of the front bracket 1 are wired by the terminal 9. In this case, the terminal 9 is not made of a plate material as in the conventional case. Since it is formed of a solid cylindrical rod wire, it can be made narrower when the same effective area is secured. Therefore, when the insulating material 10 is formed into a circular shape that is the easiest to process, Since the diameter can be made smaller than that of a plate material, a compact size can be achieved. Then, since the thus formed one is sealed and fixed to the through hole 1a of the front bracket 1 in a sealing manner, the through hole 1a can be made small in diameter, but the insulating material 10 is formed from the inner peripheral surface of the through hole 1a. The uniform pressure is applied to the outer peripheral surface of the to greatly improve the sealing effect. Moreover, since the terminal 9 has a cylindrical shape, for example, when connecting the connecting portion 9a to an external wiring, the portion of the terminal 9 protruding from the front bracket 1 to the outside can be freely aligned with the position of the external wiring. Since it can be bent in any direction, workability can be improved.

Incidentally, the terminal may be a hollow cylindrical member as shown in FIG. 4, and in that case, the plate material can be formed by bending into a cylindrical shape. If the thickness is thick, the same effect as the present invention can be achieved, but if the thickness is thin, the diameter of the terminal itself becomes large due to the existence of the hollow part, and the tubular material is, for example, U-shaped. Therefore, there is a problem that the tubular material will be crushed when it is bent into the shape, so that it cannot be adopted.

[0010]

[Operation effect]

 In short, since the present invention is constructed as described above, the inside and outside of the bracket are wired through the terminal. In this case, the terminal is not a plate material as in the conventional case, but a solid columnar shape. Since it is made of rod wire rods, it can be narrowed to secure the same effective cross-sectional area. Therefore, when the insulating material is made into a circular shape that is the easiest to process, its diameter is circular. It can be made smaller than the ones described above and can be made compact and compact. And, while the diameter of the through hole for terminal penetration formed in the bracket can be made small, the insulating material and the terminal are concentric, so the pressure from the inner peripheral surface of the through hole to the outer peripheral surface of the insulating material rotates around the axis. The sealing effect is greatly improved by making it uniform in the direction. Moreover, since the terminal has a cylindrical shape, for example, when connecting the connection part to external wiring, the terminal part protruding from the bracket to the outside can be bent in any direction according to the position of the external wiring. As a result, workability can be improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of an electric motor.

FIG. 2 is a perspective view showing a terminal covered with an insulating material.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a perspective view of a terminal showing another example.

FIG. 5 is a perspective view showing a conventional example of a terminal covered with an insulating material.

[Explanation of symbols]

 1 Front Bracket 2 Yoke 4 Armature 5 Permanent Magnet 9 Terminal 9a Connection 10 Insulation

Claims (1)

[Scope of utility model registration request] 1. An electric motor in which wiring is carried out inside and outside the bracket through a terminal penetratingly attached to a through hole formed in the bracket, wherein the terminal is a solid cylindrical rod member, and both ends thereof. A terminal in an electric motor characterized in that the portion is crushed into a flat shape to form a connection portion with an internal or external wiring of a harness or the like, and a cylindrical intermediate portion is covered with an insulating material and is penetratingly attached to the through hole. Construction.