GB2140630A - Brush mounting apparatus for use with a direct-current motor - Google Patents
Brush mounting apparatus for use with a direct-current motor Download PDFInfo
- Publication number
- GB2140630A GB2140630A GB08412469A GB8412469A GB2140630A GB 2140630 A GB2140630 A GB 2140630A GB 08412469 A GB08412469 A GB 08412469A GB 8412469 A GB8412469 A GB 8412469A GB 2140630 A GB2140630 A GB 2140630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- brush
- bracket
- brush mounting
- mounting apparatus
- connection terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
- H02K5/145—Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Brush mounting apparatus for use with a direct current motor, said apparatus comprising a bracket (3) provided with at least one connection terminal plate (2) having a brush mounting portion (2a) and a motor terminal portion (2b) each of which extends outwardly of the bracket (3), the bracket (3) being provided with at least one grooved portion (3a) adjacent the or each brush mounting portion (2a); and at least one brush (1) having a base portion (1a), which is mounted on and secured to the, or the respective, brush mounting portion (2a), and at least one foot portion (1b) which is mounted in the, or the respective, grooved portion (3a). <IMAGE>
Description
SPECIFICATION
Brush Mounting Apparatus for Use with a
Direct-Current Motor
The present invention relates to a brush mounting apparatus for use with a direct current motor.
Although the present invention is primarily directed to any novel integer or step, or combination of integers or steps, as herein disclosed and/or as shown in the accompanying drawings, nevertheless, according to one particular aspect of the present invention to which, however, the invention is in no way restricted, there is provided brush mounting apparatus for use with a direct current motor, said apparatus comprising a bracket provided with at least one connection terminal plate having a brush mounting portion and a motor terminal portion each of which extends outwardly of the bracket, the bracket being provided with at least one grooved portion adjacent the or each brush mounting portion; and at least one brush having a base portion, which is mounted on and secured to the, or the respective, brush mounting portion, and at least one foot portion which is mounted in the, or the respective, grooved portion.
Preferably, the bracket and the or each connection terminal plate are integrally moulded together.
The bracket is preferably substantially discshaped, the brush mounting portion of the or each connection terminal plate being disposed radially inwardly of its motor terminal portion.
The or each brush may have two foot portions which are disposed on opposite sides respectively of its base portion.
The or each grooved portion is preferably Vshaped so as to guide the, or the respective, foot portion into position.
The invention also comprises a direct current motor provided with brush mounting apparatus as set forth above.
The invention is illustrated, merely by way of example, in the accompanying drawings, in which: Figure 1 is a sectional view showing the main part of a known construction for mounting a brush of a direct current motor,
Figure 2 is an exploded view of a brush mounting apparatus according to the present invention, and
Figure 3 is a sectional view of the brush mounting apparatus shown in Figure 2.
A known construction for mounting a brush of a direct-current motor is shown in Figure 1. As shown in Figure 1, which is a sectional view of the main part of the said known construction, a brush 11 is mounted on a bracket 13 by simply placing a base portion 1 a of the brush 11 on an inner terminal portion 1 2a of a connection terminal plate 12 and fixing the parts 11 a, 1 2a together by welding, rivetting and so on. In this construction, however, the brush 11 is not necessarily mounted in a predetermined position on the bracket 13 since there is no means for guiding the brush 11 into such a predetermined position.As a result, the characteristics of the motor vary greatly from motor to motor, and consequently the characteristics of the motor are liable to be adversely affected. Furthermore, if the brush 11 slips off the inner terminal portion 1 2a, it cannot be fixed back, nor can its position be corrected so that assembly of the construction shown in Figure 1 is difficult and inefficient.
Figure 2 is an exploded view of a brush -mounting apparatus according to the present invention. A plurality of connection terminal plates 2, each of which is divided into a radially inner terminal portion 2a and a radially outer terminal portion 2b, are integrally injectionmolded with a substantially disc-shaped bracket 3. The inner terminal portion 2a serves as a brush mounting portion, while the outer terminal portion 2b serves as a motor terminal portion, both said portions extending outwardly of the bracket 3. A brush 1 is mounted on the inner terminal portion 2a of each connection terminal plate 2, and, as indicated above, the outer terminal portion 2b of each connection terminal plate 2 serves as a terminal for a direct current motor (not shown).A
V-shaped grooved portion 3a is provided in a surface of the bracket 3 in the region of each inner terminal portion 2a. Each brush 1 comprises a base portion 1 a, which is placed and fixed on the inner terminal portion 2a, and two foot portions 1 b which are disposed on opposite sides of the base portion 1 a and each of which is inserted into a respective grooved portion 3a.
Figure 3 is a sectional view of the brush mounting apparatus shown in Figure 2. When a brush 1 is placed on its inner terminal portion 2a, the brush 1 is guided into the correct position by the engagement between the foot portions 1 b and the V-shaped grooved portions 3a. Then the base portion 1 a of the brush 1 is fixed on the inner terminal portion 2a by welding, rivetting and so on. In this way, the brush 1 can be mounted exactly in a predetermined position on the bracket 3.
The brushes 1 and the bracket 3 can be assembled easily because of the simple shape of the foot portion 1.b and the grooved portions 3a which are provided to guide the brushes 1 into the exact positions required on the bracket 3.
Merely by inserting the foot portions of each
brush into the respective grooved portions of the
bracket, the brush can be mounted in a
predetermined position on the bracket without
positional error. Consequently, unpredictable variations in the characteristics of the motor can
be prevented. In addition, the mounting of the
brushes can be easily automated since the
brushes can be mounted from one direction and
no care need be exercised to position the brushes
during the assembly operation. As a result, the
efficiency of the assembly operation is improved
considerably and the assembly operation time can
be reduced drastically, which leads to a reduction
in cost.
Claims (9)
1. Brush mounting apparatus for use with a direct current motor, said apparatus comprising a bracket provided with at least one connection terminal plate having a brush mounting portion and a motor terminal portion each of which extends outwardly of the bracket, the bracket being provided with at least one grooved portion adjacent the or each brush mounting portion; and at least one brush having a base portion, which is mounted on and secured to the, or the respective, brush mounting portion, and at least one foot portion which is mounted in the, or the respective, grooved portion.
2. Brush mounting apparatus as claimed in claim 1 in which the bracket and the or each connection terminal plate are integrally moulded together.
3. Brush mounting apparatus as claimed in claim 1 or 2 in which the bracket is substantially disc-shaped, the brush mounting portion of the or each connection terminal plate being disposed radially inwardly of its motor terminal portion.
4. Brush mounting apparatus as claimed in any preceding claim in which the or each brush has two foot portions which are disposed on opposite sides respectively of its base portion.
5. Brush mounting apparatus as claimed in any preceding claim in which the or each grooved portion is V-shaped so as to guide the, or the respective, foot portion into position.
6. Brush mounting apparatus substantially as hereinbefore described with reference to and as shown in Figures 2 and 3 of the accompanying drawings.
7. A direct current motor provided with brush mounting apparatus as claimed in any preceding claim.
8. Any novel integer or step, or combination of integers or steps, hereinbefore described and/or as shown in the accompanying drawings, irrespective of whether the present claim is within the scope of or relates to the same or a different invention from that of the preceding claims.
9. A structure of mounting a brush on a directcurrent motor comprising a bracket, a brush and a connection terminal plate, wherein said brush is mounted on an exact position of said bracket by placing and fixing said brush on an inner terminal portion of said connection terminal plate, guided by a foot portion provided on said brush and a groove portion provided on a surface of said bracket and around said inner terminal portion, said connection terminal plate being divided into said inner terminal portion and an outer terminal portion by injection-molding said bracket in one body with said connection terminal plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7564483U JPS59183157U (en) | 1983-05-20 | 1983-05-20 | DC motor brush mounting structure |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8412469D0 GB8412469D0 (en) | 1984-06-20 |
| GB2140630A true GB2140630A (en) | 1984-11-28 |
| GB2140630B GB2140630B (en) | 1986-09-24 |
Family
ID=13582163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08412469A Expired GB2140630B (en) | 1983-05-20 | 1984-05-16 | Brush mounting apparatus for use with a direct-current motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS59183157U (en) |
| GB (1) | GB2140630B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2180999A (en) * | 1985-09-26 | 1987-04-08 | Mabuchi Motor Co | Brush gear for an electric motor |
| US5543675A (en) * | 1992-11-25 | 1996-08-06 | Johnson Electric S.A | Brush leaf means |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2004130A (en) * | 1977-09-08 | 1979-03-21 | Mabuchi Motor Co | Brush gear |
-
1983
- 1983-05-20 JP JP7564483U patent/JPS59183157U/en active Pending
-
1984
- 1984-05-16 GB GB08412469A patent/GB2140630B/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2004130A (en) * | 1977-09-08 | 1979-03-21 | Mabuchi Motor Co | Brush gear |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2180999A (en) * | 1985-09-26 | 1987-04-08 | Mabuchi Motor Co | Brush gear for an electric motor |
| GB2180999B (en) * | 1985-09-26 | 1989-09-20 | Mabuchi Motor Co | Brush gear for an electric motor |
| US5543675A (en) * | 1992-11-25 | 1996-08-06 | Johnson Electric S.A | Brush leaf means |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2140630B (en) | 1986-09-24 |
| JPS59183157U (en) | 1984-12-06 |
| GB8412469D0 (en) | 1984-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950516 |