JPH0242058Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) This invention is a brush box for a motor that is used to attach a brush box that stores and holds brushes used in motor commutation to a holder base. This relates to improvements in the mounting structure.

(Prior Art) Conventional motor brush box mounting structures include those shown in FIGS. 5 and 6, for example.

As shown in FIGS. 5 and 6, the brush box 101 forms a rectangular cylindrical portion A when attached to a brush plate 107 (described later), and a brush 110 made of carbonaceous material is moved in the direction of the arrow in FIG. A roughly inverted concave brush storage part 102 that can be slidably stored, and fixing claws 105, 105, 1 formed at the four corners of the mounting surface to the brush plate 107.
05, 105, and the brush storage section 102
A relief part 106 is formed on the side wall of the brush 110 to prevent a pigtail wire 111 (described later) from interfering with the sliding movement of the brush 110.

On the other hand, the brush plate 107 is made of metal,
Brush terminals 1 are provided on both end sides of the plate body 103.
04a and an input terminal 104b, the former brush terminal 104a is electrically connected to the brush 110 via the pigtail wire 111, and the latter input terminal 104b has two terminals 11 on one end side.
It is connected to one end of the other end of the lead wire 112 having a lead wire 113 having a lead wire 113. Further, the plate main body 103 of the brush plate 107 has respective fixing claws 105, 105, 10 of the brush box 101.
Through hole 108, 108, 1 corresponding to 5, 105
08 and 108 are formed respectively.

Further, the holder base 115 has a ring shape made of an electrical insulator such as synthetic resin,
The holder base 115 is caulked to the end cover 119 of the motor with a joint 116 leaving a gap 117. The holder base 115 has mounting holes 114, 114, 114, 114 corresponding to the fixing claws 105, 105, 105, 105 of the brush box 101.
is formed.

If the motor has a two-brush or three-brush structure, another mounting hole 1 (not shown) will be provided accordingly.
14, 114, 114, 114 are formed.
Further, this holder base 115 is formed with a conduction hole 118 for guiding the lead wire 112 connected to the input terminal 104b.
9 is also formed with a conduction hole 118.

When attaching the brush box 101 to the holder base 115, as shown in FIG. ,105,10
5, 105 are the through holes 108, 108, 108, 108 of the brush plate 107 and the mounting holes 114, 114, 11 of the holder base 115.
4, 114 in order, and the holder base 1
On the opposite side of 15, the fixing claws 105, 105, 1
05 and 105 respectively.

Note that the brush 110 includes this brush 11
0, a spring (not shown) is provided to apply an appropriate pressure toward the rotor (not shown).

(Problem to be solved by the invention) However, in the conventional motor brush box mounting structure as described above, the fixed claw 105
The brush box 101 with the brush box 101 and the brush plate 107 with the brush terminals 104a and input terminals 104b are separate parts, and the holder base 115 and end cover 119 are provided with conduction holes 118 for the lead wires 112. There is a need,
In addition, when attaching the brush holder 101 to the holder base, the lead wire 112 connected to the input terminal 104b of the brush plate 107 may get in the way and hinder work, so it is difficult to process the parts and attach each part. There were problems in that the assembly cost was high due to the large number of man-hours required, and there was also a high possibility that defects would occur due to assembly errors.

This idea was created by focusing on the above-mentioned problems, and it was previously possible to reduce the assembly cost by simplifying the installation of the brush box that stores and holds the brushes, and by reducing the number of installation steps. It is an object of the present invention to provide a brush box mounting structure for a motor that is possible and less likely to cause problems when the brush box is mounted.

[Structure of the idea]

(Means for Solving the Problems) This invention has a structure in which a brush box that houses brushes that contact the rotor and are energized is attached to one side of the holder base of the motor, and that the brush box is configured to supply power to the brushes. Further, a power input terminal having a locking portion to the holder base is integrally formed, and a terminal penetration hole through which the power input terminal passes is provided in the holder base, and the power input terminal is provided with a terminal penetration hole through which the power input terminal passes. A locking portion for the holder base is locked to a wall of the terminal penetration hole while penetrating the hole and protruding the tip portion of the power input terminal to the other side of the holder base to form a power connection portion. In one embodiment, the brush box is integrally formed with a brush terminal, and depending on the structure, the holder base is attached to the holder base. It is characterized by being used as an end cover.

(Embodiment) Hereinafter, a motor brush box mounting structure according to an embodiment of this invention will be explained using FIGS. 1 to 3 a and b.

As shown in FIG. 1, the brush box 1 is made of metal and has an approximately inverted concave shape, and includes a brush storage section 2 for storing a carbonaceous rectangular parallelepiped brush 10, and a brush storage section 2 for storing a carbonaceous rectangular parallelepiped brush 10. It consists of a brush terminal 3 and a power input terminal 4 formed on both sides, and a fixing piece 5 for attaching and fixing the brush box 1 to a holder base 15, which will be described later.

The holder base 15 is ring-shaped and made of an electrical insulator such as synthetic resin, and is provided with a terminal through hole 14 and an attachment hole 13 corresponding to the power input terminal 4 and the fixing piece 5, respectively. It is something.

Next, regarding each part of the brush box 1,
I will explain in more detail.

As shown in FIG. 3a, the brush storage section 2
, the brush box 1 is attached to the holder base 1.
A rectangular tube part A that can accommodate the brush 10 so as to be slidable in the direction of the arrow in FIG.
is formed together with one side of the holder base 15 (the top side in FIG. 1), and on both side walls of the brush storage section 2, as shown in FIGS. 11 is formed with a relief part 6 which prevents the brush 10 from interfering with sliding movement.

Further, as shown in FIG.
A serrated locking portion 5a is formed to prevent the fixing piece 5 from coming off from the holder base 3, and as shown in FIG. The length is such that it is not exposed on the other surface (lower surface in FIG. 3a) of 15.

Further, as shown in FIGS. 1 and 3b, when the power input terminal 4 is press-fitted into the terminal through hole 14 at the middle part of the power input terminal 4, the wall of the terminal through hole 14 A serrated locking portion 4a is formed to lock the brush 1 together with the fixing piece 5.
0 and brush box 1.

As shown in FIG. 1, the brush terminal 3 is connected to the other end of the pigtail wire 11, which has one end connected to the brush 10. Further, the power input terminal 4 is connected to the power input terminal 4.
When the brush box 1 is attached to the holder base 15 by penetrating through the terminal penetration hole 14 of the holder base 15, the tip portion thereof protrudes to the other side of the holder base 15 (as shown by the imaginary line). By forming the power supply connecting portion 4b in the state shown in ), it is possible to connect a power supply side lead wire (not shown).

Therefore, when attaching the brush box 1 to the holder base 15, as shown in FIG. In this way, the power input terminal 4 and the fixing piece 5 are press-fitted into the terminal through hole 14 and the attachment hole 13, respectively.

At this time, since the lead wire on the external power supply side is not connected to the power input terminal 4, there is no possibility that the lead wire wanders around and interferes with the installation work of the brush box 1, unlike in the conventional case. will be carried out smoothly.

Then, as shown in FIG. 3a, the brush 10 is inserted from the outer peripheral side of the holder base 15 into the rectangular tube part A formed by the brush storage part 2 and one side of the holder base 15. , as shown in FIG.
The holder base 15 is assembled to the case of the motor 30 so as to be in contact with the motor 30.

Note that a spring and a spring pressure adjustment mechanism (not shown) are arranged on the rear surface of the brush 10 (the surface opposite to the rotor 20), so that the brush 10 can be attached to the rotor 20 shown in FIG. Adjusted to make contact with pressure.

Next, a lead wire on the external power source side is connected to the power supply connecting portion 4b at the tip of the power input terminal 4, which passes through the terminal penetration hole 14 and projects to the other side of the holder base 15.

As described above, in this mounting structure of the brush box 1, the locking parts 5a, 4 are attached to the brush box 1.
The fixing piece 5 and the power input terminal 4 are integrally provided and are press-fitted into the mounting hole 13 and the terminal penetration hole 14, respectively, for installation. After the base 15 is assembled to the case of the motor 30, the lead wire can be connected to the power supply connection part 4b of the power supply input terminal 4, so that the brush box 1 can be firmly and easily mounted.

Furthermore, since the fixing piece 5 does not protrude from the other side of the holder base 15, there is no need to worry about short circuits at this part, allowing the holder base 15 and the end cover to be integrated as shown in FIG. It also becomes possible.

[Effect of idea]

As explained above, in this invention, in a structure in which a brush box housing brushes that contact the rotor and are energized is attached to one side of the holder base of the motor, the brush box is configured to supply power to the brushes and to A power input terminal having a locking portion to the holder base is integrally formed, and the holder base is provided with a terminal through hole through which the power input terminal passes, and the power input terminal is passed through the terminal through hole. Then, with the tip portion of the power input terminal protruding toward the other surface of the holder base to form a power connection portion, the locking portion to the holder base is locked to the wall of the terminal penetration hole, and the brush is closed. Since the brush box is attached to the holder base, the number of parts and machining parts are reduced, and the brush box can be installed firmly and easily, reducing the number of installation steps, thereby reducing assembly costs. It has an extremely excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded perspective view illustrating a brush box mounting structure according to an embodiment of this invention, and Fig. 2 is an internal explanatory view showing a state in which a holder base with a brush box for storing brushes is installed in a motor. , Figures 3a and 3b are cross-sectional explanatory diagrams taken along line A-A and line B-B in Figure 2, respectively, and Figure 4 shows a situation where the holder base with the brush box attached is also used as the end cover of the motor. FIGS. 5 and 6 are a partially exploded perspective view and a sectional view of the brush box mounting portion, respectively, illustrating a conventional brush box mounting structure. 1... Brush box, 3... Brush terminal,
4...Input terminal, 4a...Locking part, 4b...Power connection part, 10...Brush, 14...Terminal penetration hole, 15...Holder base, 20...Rotor, 3
0...Motor.

Claims (1)

[Claims for Utility Model Registration] (1) In a structure in which a brush box housing brushes that contact the rotor and are energized is attached to one side of a holder base of the motor, the brush box supplies power to the brushes and A power input terminal having a locking portion to the holder base is integrally formed, and the holder base is provided with a terminal penetration hole through which the power input terminal passes,
The locking portion to the holder base is formed by penetrating the power input terminal into the terminal penetration hole and protruding the tip portion of the power input terminal toward the other surface of the holder base to form a power connection portion. A brush box mounting structure for a motor, characterized in that the brush box is attached to the holder base by being locked to a wall of a terminal through hole. (2) The brush box mounting structure for a motor according to claim 1, wherein the brush box has a brush terminal integrally formed therein. (3) The motor brush box attachment according to claim 1 or 2, wherein the holder base is also used as an end cover of the motor. structure.