JPH0130863Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to fixing a brush holder of a motor.

(Prior art) Regarding the technology for fixing the brush holder to the motor, conventionally, when fixing the brush holder to the gear case, the gear case is fixed by screwing using tightening screws and caulking using rivets, etc. and directly fixed the brush holder.

For this purpose, processing equipment for screw tightening and caulking is required, which further increases the number of processing steps. Additionally, carbon powder from the brushes scatters inside the motor case and adheres to the inside of the motor body, resulting in conduction between the brushes and the motor case.

(Problems to be solved by the invention) The present invention has been made to solve the above-mentioned drawbacks, and it eliminates the work of fixing the brush holder to the gear case by tightening screws, etc., and prevents the carbon powder of the brush from scattering. This is the purpose.

(Means for Solving the Problem) The configuration of the present invention is such that in a motor having a brush holder fixing part 12, a brush holder 5, a gear case 6, and a motor case 9, the brush holder fixing part 12
has a cylindrical body 1, a brush holder pressing side edge 2 on the end surface of the cylindrical body 1, and a protrusion 4 having a substantially L-shaped presser part 3 at the tip on the brush holder pressing side edge 2 side, The brush holder 5 has a plate shape having an outer periphery similar to the cross-sectional shape of the cylinder 1, and has a notch 7 on the outer periphery and a brush 13 on the plate.
An edge 11 and a second edge 1 located outside the edge 11
6 and a notch 8, the motor case 9 has:
The brush holder fixing part 12 fits inside the motor case 9, and the brush 1 is attached to the brush holder pressing side edge 2 of the brush holder fixing part 12.
3, and the edge 11 of the gear case 6 is pressed to the surface of the brush holder 5 that does not have the brush 13. It fits into the notches 7 and 8 of the case 6, and the holding part 3 at the tip of the protruding part 4 is sandwiched between the second edge 16 of the gear case 6 and the edge 10 of the motor case 9. This is a characteristic motor.

(Embodiment and operation) An embodiment of the present invention will be described below based on the drawings.

As shown in FIGS. 3, 4, and 5c, two protrusions 4 are formed on the brush holder pressing side edge 2 of the cylinder 1 that fits inside the motor case 9, and The holding portion 3 is provided by bending the tip of the protruding portion 4 outward into a substantially L-shape. The presser part 3 is attached to the edge 10 of the motor case 9 (see Fig. 5d), as will be described later.
It is for pressing with.

The brush holder fixture 12 is thus configured.

Then, the brush holder 5 with the brush 13 attached thereto
As shown in FIG. 5B, the gear case 6 is provided with a notch 7 having a width approximately the same as the width of the protrusion 4, and as shown in FIG. A notch 8 corresponding to the shape of the portion 3 is provided.
14 is a mounting hole.

In this embodiment, the protrusions 4 are provided on both sides of the cylindrical body 1, but the number of protrusions 4 is not limited to two, and an appropriate number (for example, three) may be provided.

Next, fixing of the brush holder 5 according to the present invention will be explained.

In FIG. 5, the brush holder 5 is sandwiched between the gear case 6 and the cylindrical body 1, and the protruding parts 4 and the presser parts 3 provided on both sides of the brush holder pressing side edge 2 of the cylindrical body 1 are attached to the brush holder. 5 and gear case 6, respectively, and set them (see FIG. 2). In this case, the brush holder 5 is held at its periphery by the edge 11 of the gear case 6 and the brush holder pressing side edge 2 of the cylinder 1 from both sides, and the protrusion 4 and the notch 7 are fitted together. It won't fall off because it's in place.

The brush 13 is attached to the brush holder fixing part 12.
It is fixed to the brush holder 5 so as to be located inside the brush holder 5.

Furthermore, the gear case 6, brush holder 5, and brush holder fixing part 12 are inserted into the motor case 9 shown in FIG. 5d.

At this time, as shown in FIG. 6, the protruding part 4 fits into the notch part 8 of the gear case 6 at the edge 10 of the motor case 9, and presses the holding part 3 which is bent outward into a substantially L-shape. By pressing, the gear case 6 and the motor case 9 are connected with the tightening screws 15.

As described above, the brush holder 5 set in the gear case 6 is positioned at a fixed position by the brush holder fixing part 12.
The presser portions 3 formed at the tips of the protruding portions 4 provided at two locations are attached to the edges 10 of the gear case 6 and motor case 9.
It acts to fix the brush holder 5.

(Effects of the invention) As explained above, the present invention eliminates the work of fixing the brush holder to the gear case by tightening screws and caulking using rivets, etc. Since no equipment is required and the structure is simple, the brush holder can be easily fixed.

Furthermore, the cylindrical body of the brush holder fixing part is fitted inside the motor case, and the brush is located inside the cylindrical body, so that carbon powder does not scatter and adhere to the inside of the motor case. This has effects such as being able to prevent conduction in the motor case.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic front view of the wiper motor, Fig. 2 is a plan view showing how the brush holder is attached, Fig. 3 is a plan view of the brush holder fixture, and Fig. 4 is a sectional view taken along the line A-A in FIG. 3, and FIG. 5 is an exploded perspective view of the present invention.
is gear case, b is brush holder, c is cylinder, d
FIG. 6 is a perspective view showing the motor case, and FIG. 6 is a partially cutaway front view showing the fixed state of the brush holder. 1 is a cylinder body, 2, 10, 11 are edges, 3 is a presser part, 4 is a protrusion part, 5 is a brush holder, 6 is a gear case, 7, 8 are notches, 9 is a motor case, 12
1 is a brush holder fixture, 13 is a brush, and 16 is a second edge of the gear case.

Claims (1)

[Claims for Utility Model Registration] In a motor having a brush holder fixing part 12, a brush holder 5, a gear case 6, and a motor case 9, the brush holder fixing part 12 is attached to a cylindrical body 1 and an end face of this cylindrical body 1. The brush holder 5 has a brush holder pressing side edge 2 and a protruding part 4 having a substantially L-shaped presser part 3 at the tip on the brush holder pressing side edge 2 side. The gear case 6 has a plate shape having a similar outer circumference and has a notch 7 on the outer circumference and a brush 13 on the plate. and a notch 8 , the motor case 9 has an edge 10 , and the brush holder fixing portion 12 is connected to the motor case 9
, press the brush holder 5 on the side with the brush 13 to the brush holder pressing side edge 2 of the brush holder fixing part 12, and press the edge of the gear case 6 on the side of the brush holder 5 that does not have the brush 13. Part 11
The protruding part 4 of the brush holder fixing part 12 fits into the notches 7 and 8 of the brush holder 5 and the gear case 6, and the holding part 3 at the tip of the protruding part 4 fits into the second part of the gear case 6. A motor characterized in that it is sandwiched between an edge 16 and an edge 10 of a motor case 9.