JPH11215759A - Brush holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush holder for holding the brush of a motor with a brush which is able to increase operability. SOLUTION: This brush holder is provided with a base 10 inserted with sleeves 2 inserted with brush 1 and nuts mounted on the base 10 and screwed with lead wire mounting sections 5 of the sleeves 2. In the base 10, holes into which at least the ends of terminal screws 18 are inserted, when lead wires 16 are tightened by terminal screws 18 to prevent the slip-out of the sleeves 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush holding device for holding a brush of an electric motor with a brush.

[0002]

2. Description of the Related Art Conventionally, a brush holding device of this type is provided with a plurality of arc-shaped brush holder members having one holder portion, as described in Japanese Patent Application Laid-Open No. 5-56596 (H02K5 / 14). 2. Description of the Related Art There is known a brush holding device in which respective brush holder members are connected by screws used for fixing terminals of lead wires connected to a brush inserted into a part, and the brush holder members are fixed to a bracket by the screws.

However, with such a configuration,
The pigtail provided on the brush hinders the mounting of the bolt, and the two parts for connection and the bracket must be fixed together by the bolt for mounting the pigtail. At the same time, the connecting portion may rotate, resulting in a problem that workability deteriorates.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a brush holding device with improved workability.

[0005]

According to the present invention, there is provided a sleeve having a lead wire attaching portion for connecting a lead wire for power supply through a brush, a base into which the sleeve is inserted,
A nut fixed to the base, and a terminal screw that is screwed to the nut and connects the lead wire, wherein a hole through which at least the tip of the terminal screw is inserted is formed in the base. I do.

With the above arrangement, when assembling the brush holding device, the nut is fixed to the base, the sleeve holding the brush is inserted into the base, and the terminal screw and the nut are screwed to the lead wire mounting portion. Attach and tighten the leads. At this time, since the tip of the terminal screw is inserted into the hole, the terminal screw does not get caught in the hole and the sleeve does not come off the base.

Further, the sleeve is formed of a single metal plate.

Therefore, it is not necessary to fix a pigtail or the like for connecting the brush to the power supply terminal or the like with a bolt, and the connection can be made by tightening a lead wire mounting portion formed on the sleeve with a nut.

Further, the lead wire mounting portion is characterized in that when the sleeve is inserted into the base, the lead wire mounting portion comes into contact with a step portion of the base.

Therefore, when the sleeve is mounted on the base, positioning is performed without excessive insertion.

The lead wire attaching portion forms a terminal hole through which the terminal screw is inserted, and the terminal hole substantially matches the hole when the sleeve is inserted into the base. Therefore, there is no need to align the terminal holes with the holes during the operation, and the terminal screws can be easily attached.

Further, since the standing piece is formed in the vicinity of the hole of the base, the standing piece prevents the terminal from rotating when the terminal of the lead wire is fixed, and the workability is improved.

[0013] Further, the sleeve is formed with a projecting piece extending in the insertion direction of the base, and the base is formed with a groove in which the projecting piece slides.

Therefore, the sleeve serves as a guide when the sleeve is inserted into the base, which facilitates the insertion.

[0015] Since the protruding portion is formed with a projection in a direction substantially perpendicular to the insertion direction of the base, when the operation of inserting the sleeve is performed, the sleeve is not easily moved in the direction in which the sleeve comes off from the base. The workability is improved.

[0016]

Embodiments of the present invention will be described with reference to the drawings.

First, regarding the brush portion, FIGS.
It will be described based on.

Reference numeral 1 denotes a brush provided so as to be in contact with the commutator of the electric motor. The brush 1 is covered by exposing a part of the brush 1 with a box-shaped sleeve 2 made of one metal. I have. The four brushes 1 are provided and abut against the commutator from four directions.

Reference numeral 3 denotes a spring provided in the sleeve 2 between the brush 1 and the spring 3. The spring 3 is attached to the commutator side so that the brush 1 projects from the sleeve 2 and contacts the commutator. I'm going.

Reference numeral 4 denotes a pigtail connected to the rear end of the brush 1 and connected to the rear piece of the sleeve 2 by welding through the spring 3. The pigtail 4 is bent in the spring 3 by the expansion and contraction of the spring 3. It grows and stretches.

Reference numeral 5 denotes a lead wire mounting portion formed in the sleeve 2 and having a terminal hole 6 protruding laterally.

Reference numeral 7 denotes a sleeve 2 on both sides of the sleeve 2.
The protruding piece is formed in the insertion direction of the
And two convex portions 8 formed in the vertical direction.

Reference numeral 9 denotes a notch formed in a portion of the sleeve 2 from which the brush 1 projects.

Next, the mounting state of the sleeve 2 will be described with reference to FIGS.

Reference numeral 10 denotes a disk-shaped base having an opening 11 through which the commutator passes. The base 10 forms insertion holes 12 at which the sleeve 2 can be provided at four places at equal intervals. ing.

Reference numeral 13 denotes a hole formed in the vicinity of the insertion opening 12 and penetrating from the front surface to the back surface. One side where the hole 13 is formed has substantially the same shape as the nut into which a nut (not shown) fits. A rectangular nut mounting recess 14 is formed. In addition, when the sleeve 2 is inserted, a step portion 15 with which the lead wire attaching portion 5 comes into contact is formed on the base 10 so as not to be inserted more than a predetermined amount. Then, when the sleeve 2 is inserted into the insertion opening 12 and the lead wire attaching portion 5 and the step portion 15 come into contact with each other, the terminal holes 6 and the holes 13 match. When the sleeve 2 is inserted, the nut provided in the nut mounting recess 14 is sandwiched between the nut mounting recess 14 and the lead wire mounting portion 5. As shown by the broken line in FIG. 4, when the terminal 17 provided at the end of the power supply lead wire 16 is attached to the lead wire attaching portion 5 with the terminal screw 18, the terminal screw 18
Is screwed into the nut to connect the lead wire 16 and the end of the terminal screw 18 is inserted through the hole 13, so that the sleeve 2 does not come off from the base 10.

Reference numeral 19 denotes a groove formed in the insertion opening 12 of the base 10. When the sleeve 2 is inserted, the protrusion 7 is guided by the groove 19. When the sleeve 2 is inserted, the protrusion 8 slides in the groove 19, so that when the base 10 is inclined at the time of insertion, the sleeve 2 does not come off in the opposite direction.

Reference numeral 20 denotes a standing piece formed by projecting from one side surface of the insertion opening 12. When the terminal 17 is fixed by the terminal screw 18, the terminal 17 tries to rotate with the rotation of the terminal screw 18. The contact between the stand 17 and the standing piece 20 has an effect of preventing rotation.

Further, a case where a commutator is inserted into the opening 11 will be described with reference to FIG.

Reference numeral 21 denotes a U-shaped pin formed from the notch 9 of the sleeve 2 to the length of the rear piece of the sleeve 2. The pin 21 is used to facilitate insertion of the commutator into the opening 11. It is used to keep the brush 1 from protruding from the sleeve 2. After the commutator is inserted, the brush 1 is brought into contact with the commutator by removing the pin 21.

As described above, the hole 13 through which the tip of the terminal screw 18 for attaching the terminal 17 is inserted is formed in the base 10, so that when assembling the brush holding device, the nut is fixed to the base 10 and the brush 1 is fixed. The sleeve 2 holding the base 10
Then, the terminal screw 18 is screwed into the lead mounting portion 5 with a nut, and the lead 16 is connected. At this time, since the tip of the terminal screw 18 is inserted into the hole 13, the sleeve 2 does not fall out of the base 10.

Also, since the sleeve is formed of 21 metal plates, it is not necessary to fix the pigtail or the like for connecting the brush 1 to the power supply terminal or the like with screws, and the lead wire formed on the sleeve 2 is not required. Connection can be achieved by tightening the mounting portion 5 with a nut, and workability is improved.

Further, when the lead wire mounting portion 5 of the sleeve 2 is inserted into the base 10, the lead wire mounting portion 5 comes into contact with the step portion 15 of the base 10, so that the sleeve 2 may be inserted too much. Without this, the brush 1 can be fixed at an appropriate position, and positioning is achieved.

The lead wire mounting portion 5 of the sleeve 2
Is formed with a terminal hole 6 through which the terminal screw 18 is inserted. When the sleeve 2 is inserted into the base 10, the terminal hole 6 and the hole 13 substantially coincide with each other. The terminal screw 18 can be easily attached without having to match the hole 13 with the hole 13.

Further, since the standing piece 20 is formed in the vicinity of the hole 13 of the base 10, the standing piece 20 prevents the terminal 17 from rotating when the terminal 17 is fixed, and the workability is improved.

The sleeve 2 is provided with a protruding piece 7 extending in the insertion direction of the base 10, and the base 10 is formed with a groove 19 into which the protruding piece 7 is fitted. It serves as a guide when inserted into the base 10 and facilitates insertion.

The projecting piece 7 has a projection 8 formed in a direction substantially perpendicular to the direction in which the base 10 is inserted.
Since the sleeve 2 does not easily move in the direction of coming out of the base 10 when performing the work of inserting
Workability is improved.

[0038]

According to the present invention, there is provided a sleeve having a lead wire attaching portion for connecting a lead wire for power supply through a brush, a base into which the sleeve is inserted, a nut fixed to the base, A terminal screw for screwing to the nut and connecting the lead wire is provided, and a hole for inserting at least the tip of the terminal screw is formed in the base, so that the sleeve can be prevented from coming off by the terminal screw for attaching the lead wire. The effect is obtained such that the quality of the brush can be improved with a simple configuration.

Further, since the sleeve is formed of a single metal plate, there is no need to screw the pigtail or the like, and it is only necessary to attach the lead wire to the lead wire attachment portion, thus improving the workability. To play.

Further, the lead wire mounting portion of the sleeve comes into contact with the step of the base when inserted into the base, so that when the sleeve is mounted on the base, positioning is performed and workability is improved. To play.

The lead wire mounting portion of the sleeve is
Forming a terminal hole through which the terminal screw can be inserted, and when the sleeve is inserted into the base, the terminal hole almost matches the hole, so the terminal screw can be easily turned and the workability is improved. To play.

Further, since the standing piece is formed in the vicinity of the hole of the base, the standing piece serves to prevent the terminal from rotating when the terminal is fixed, and has the effect of improving workability.

Further, since a protruding piece extending in the insertion direction of the base is formed on the sleeve, and a groove for fitting the protruding piece is formed on the base, which serves as a guide for inserting the sleeve into the base.
It has effects such as easy insertion.

Since the projection has a convex portion substantially perpendicular to the insertion direction of the base, when the operation of inserting the sleeve is performed, it is necessary to prevent the sleeve from easily moving in the direction in which the sleeve comes off from the base. Therefore, effects such as improved workability can be obtained.

[Brief description of the drawings]

FIG. 1 is a top plan view showing a state in which a brush of a brush holding device of the present invention is attached to a sleeve.

FIG. 2 is a side view of the same.

FIG. 3 is a side sectional view of the same.

FIG. 4 is a bottom plan view showing a state where a brush is attached to a base of the brush holding device of the present invention.

FIG. 5 is a top plan view of a base of the brush holding device of the present invention.

FIG. 6 is a side view of the same.

FIG. 7 is a bottom plan view showing a main part of a state where the brush is attached to the base of the brush holding device of the present invention.

FIG. 8 is a side view showing a use state of a pin of the brush holding device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brush 16 Lead wire 5 Lead wire attaching part 2 Sleeve 10 Base 18 Terminal screw 13 Hole 15 Step 6 Terminal hole 20 Standing piece 7 Protrusion piece 19 Groove part 8 Convex part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masanori Kamei 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Toshihiro Matsumoto 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Yoshihiko Maeda 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (7)

[Claims] 1. A sleeve having a lead wire attaching portion for connecting a lead wire for power supply through a brush, a base into which the sleeve is inserted, a nut fixed to the base, and the nut. And a terminal screw for connecting the lead wire, and a hole is formed in the base through which at least a tip of the terminal screw passes. 2. The brush holding device according to claim 1, wherein said sleeve is formed of a single metal plate. 3. The brush holding device according to claim 1, wherein said lead wire attaching portion abuts on a step portion of said base when said sleeve is inserted into said base. 4. The lead wire mounting portion forms a terminal hole through which the terminal screw is inserted, and the terminal hole substantially matches the hole when the sleeve is inserted into the base. The brush holding device according to claim 1, wherein 5. The brush holding device according to claim 1, wherein a standing piece is formed near the hole of the base. 6. The brush according to claim 1, wherein a protrusion is formed on the sleeve so as to extend in a direction in which the base is inserted, and a groove on which the protrusion slides is formed on the base. Holding device. 7. The brush holding device according to claim 6, wherein a protrusion is formed on the projecting piece in a direction substantially perpendicular to a direction in which the base is inserted.