DE7601062U1 - Brush holder supports for electric motors - Google Patents

Description

Jan 15, 1976

Applicant ;

Spa. EIETTROMOTORI CIARAMELLA

20087 - Robecco S / N (Milan) - Italy Via dei Barzi

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Brush holder carriers for electric motors

The present application "relates to improvements to brush

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support brackets for electric Ecaanitatoraiotoreii Terhal It

massively low performance, in particular characterized by a compact and simple embodiment, in connection

with an appropriate insulation of their metallic parts in relation to the live parts.

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According to one feature of the registration on the doorstep, the

Brush holder designed such that it is in an associated Bearing point of the carrier can be determined ^ st and at the same time

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at the same time a protective part made of non-conductive material

holding, with the simultaneous double task of the storage

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to hold the socket of the motor shaft and a container for

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Admission of a lubricant for the mentioned bearing bush to build.

Inside the brush holder there is a seat for receiving

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a metallic jersey size for the purpose of guiding the brush in brought, with this insert via a mechanically and electrically solid contact a serving for connection

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^{"" ~: ·:} 15 Jan. 1976

Cable lug is connected. to which the electrical conductor is clipped, which, moreover, to hold on and centering the spring acting on the burete is used.

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S The non-conductive support part of the bearing bush comprises legs,

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which cooperate with corresponding protruding sanders of the burst carrier to accommodate the metallic carrier

and of the parts under tension «under protection an appropriate isolation distance to isolate electrically.

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According to the renewal of the brush holder carrier, this will be

The aim was to create a brush holder with a simple design produce, which in a simple manner by means of

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automated machines assembled to perform work flows can be, and via which directly with de * Kabelschub, related pen one continuous

Contact must achieve. This creates the appearance of the brush fire or arc reduced if not excluded, which on the other hand, premature wear of the Brush, as well as, as a result of excessive heating, a loss the mechanical properties of the spring could cause

consequently the correct contact pressure of the brush on the Laufer was adversely affected.

In general, a brush holder according to the invention comprises

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for electric motors in connection with a hatch-shaped

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designed metallic support element for the brush holder, with laterally arranged, profiled legs for attachment to the engine; an inside and along that

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metallic! rager arranged part in Kichtleitermatexial,

with outer lateral legs that are partially arranged around the webs of the enff ^^ e ^ y ^ ragers, and a bristle carrier

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in NichteitermateriaJt as. j eäeflL .End of the aforementioned carrier, ¹ wherein the burst carrier has a shaft for forcible connection in a bearing point of a lateral leg of the

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Has carrier and in an associated hole of the non-conductive Part engages to fix the latter;

also has laterally protruding webs or bands, which to lie on the web edges of the non-conductive part

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come; each brush holder is also used to guide the

Insert includes a metallic insert, which over a side bearing for forced connection with a cable lug for electrical connection with a Head grouted.

A specific, innovation according to the embodiment of the

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Brush holder carrier is then referred to with reference to the attached drawings described in more detail. It shows:

Fig. 1 is a view of a conventional engine with one on this

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attached brush holder carrier according to the renewal, Fig. 2 is an enlarged side view of the carrier, partly

wise in longitudinal section,

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Fig. 3 shows the view of an outermost part of the carrier Fig. 2,

Figure 4 is a cross-section with respect to a brush holder, taken along line 4-4 of Figure 3;
Fig. 5 is a partial view of an outermost part of the

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Brush holder carrier according to Fig. 2 in an exploded view.

Figure 1 shows a conventional, electric motor 1, deseen Laufer is mechanically and electrically connected to commutator 2

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is bound and vJoeT is fed by fixed brushes carried by a brush holder, and is designated as a goose with 3,

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is permanently mounted on the engine. ^: * · ■ "

The properties of the brush holder carrier according to the innovation go from Figures 2 to 5 of the accompanying drawings

clearly. As can be seen from the figures mentioned,

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if the brush holder carrier exists according to the innovation in the essential

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tally made from a buSeI or metallic hruck-shaped formed carrier 4, with a central flat part and lateral legs 5 with on its edges useful recesses 6 to ensure a in relation to the stand " winding the motor 1 correct isolation distance.

Each side leg of the carrier embraces the outside bent or outwardly directed part 5 'with

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through holes 7 for the screws for the purpose of fastening the

Bracket to the engine.

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In the center of the carrier or bracket 4, a spherical bearing

place 8 to support a bearing bushing 9 of the motor shaft

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arranged. The bearing bush 9 is by means of a pressure ring

10 of the bearing bush held in place in a bearing point 11 of a non-conductor element 12, shaft inside and along

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ζθ of the metallic carrier 4 is arranged inserted.

The dielectric element 12 forms, together with the metallic

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see carrier 4 a container 13 in which a lubricant,

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for example via the hole 14 in the bridge-shaped carrier even can be admitted.

As can also be seen clearly from FIG. 2 and from the exploded view of FIG. 5, the dielectric part has 12 at each end a transverse leg 15 with one hand vertically arranged webs 15 'along the lateral contour edges. which serve the associated leg 5

of the metallic carrier i to be partially surrounded and opposed

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xiier to electrically isolate the ground.

15, Jan,, bvO

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Each leg 5 of the carrier 4 has a storage point or

Hole 16 for the forced retraction of a general string 1?

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! designated burst carrier.

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The burst carrier 17 consists essentially of non-conductor material, a central, flat part 18 with a shape corresponding to the leg 5 of the carrier, which between

the legs 15 and the dielectric part 12 is introduced and its laterally protruding bands 18 »move when in contact

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cover with the bands of the aforementioned legs 15, so

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that the leg 5 of the hrucken-shaped carrier 4

corresponding part is completely surrounded and recorded. In order to

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it is possible to use the prescribed isolation distances achieve·

In addition, each has a brush holder 17 on one side of the central, flat part 18 has a cylindrical shaft

19 whose dimensions are forced into the seat of the carrier 4

can be introduced and firmly connected to this. To this The purpose is in the hole of the leg 5 protruding parts 20

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provided, which for the shaft 19 of the burst carrier Represent compulsory points.

As is clear from Figures 2 and 4 of the accompanying drawings

it can be seen that the cylindrical shaft 19 is elongated,

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in addition to the forced introduction into the hole 16 of the

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metallic support via a corresponding hole 21 (Fig.

5) in the wing 15 of the non-conductor part 12 also around this to hold onto the latter.

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The burst carrier 17 extends on the side facing away from the shaft 19 with a part 22 in which a seat 22 '

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for a metallic insert 23, for guiding a brush

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24 introduced for the contact roit.äem ^ omgpit; ator 2 of the motor is.

As shown in the exploded view of Figure 5 clearly shows Iesitzt de ⁿ - was metallic insert 23 in the specific case a TJ-shaped cross-section or a U-formiges profile, on one side thereof by punching a seat 23 'is formed forcibly the pointed in the End 15 of an electrical conductor (not shown) arranged for connection to an outside can be inserted.

After all, the cable lug 26 has an extended middle Part 27, on which on the side facing the pointed part 25 for centering and positioning

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a spring 29 pressing the brush has a protruding part or eye bulge has been formed.

In this way, a direct and permanent electrical contact between the brushes 24, the metallic insert 23 and the compression spring 29 is established. Especially since the spring 29 is always tensioned, as a result, between the cable lug

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and the brush 24 via the spring 29 itself is always a good one

electrical contact guaranteed.

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In addition, the cable lug 26 has an end 30 with wings

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31 for clamping a conductor and the associated non-conductive sheath.

One that is always made of non-conductive, plastic material Lid 33 closes the brush holder from the outside, in-that this by means of its lateral extensions 33 'in assigned bearing points 34 · {Fig. 5), soft in the side

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Chen long openings of the mentioned extension 21 of the brush

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carriers are formed is introduced. With the brush holder

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supports for electric commutator motors result

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according to the innovation essential »Yerieile constructive,

functional as well as economic character.

The manufacture of the brush holder base becomes actual significantly simplified and ensured by means of special equipment, a completely automatic assembly.

The presence of flight on the non-conductive, interior Element 12 as well as on the brush holder 17 ensures a perfect insulation of the metallic support 4 opposite of the motor winding, these generally meeting the usual requirements of insulation is equivalent to.

Ultimately, due to the special mechanical and electrical connection system between cable lug 26, metallic insert 24älind as a result of the brush 24 the

, 15 disadvantages completely eliminated which in the already known

Systems occurred in which the lack of a good and

permanent contact resulted in the formation of sparks or arcs which did not damage the brush alone, their duration of use was shortened, but also the

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Compression spring of the brush itself. The proposed solution

however, results in a permanent electrical contact over

the spring itself, showing the disadvantages of the conventional one Brush holder significantly reduced. Finally, the plug 33 made of plastic material is used to improve the Leak tightness and protection of the internal contacts of the brush holders.

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The brush holder according to the renewal is thus marked

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by a squat structure and ^Ä a completely formed insulation of the metallic parts with respect to the live parts of the motor; Finally

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sieli results from the greatly simplified Zusannaeniauweis

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an economically favorable design.

I however, it is clear that with specific reference to

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1 the drawings mentioned or depicted solely as examples

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1 leadership example additional adaptations or variants are added

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can be _β

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Claims (5)

1 Ί19 · ~ 15, Jan. 1976 Protection claim * SB 1. Brush holder carrier for electric motors, thereby marked that this follows from the union ■ B Parts consists of: a metallic part (4) as a support for the brush holder, which has a bridge shape with profiled legs on the side for attachment to the motor (5), a part made of non-conductive material and arranged inside and along the metallic support (12) with external side shackles (15), which are mn η β each outer end of the girder around part of the legs B N (5) of the mentioned carrier (4) and one made of insulation material arrange rially formed brush holder (17); that / ier Brush holder (17) has a shaft (19) for the purpose of forced in " further connection of a bearing point (16) in an associated one lateral leg (5) of the carrier (4), the shaft It (19) through a hole (2l) of the non-conductive Part (12) is guided for the purpose of fastening the same; Moreover a central flat part (18) with protruding hands (19) which on the legs (15) of the non-conductive part (12) rest on; each brush holder (17) also having one Bearing point (22) for a metallic * insert (23) B B Guide a brush (24) has, the soft latter insert It (23) has since-lent a depository (23 ') for the compulsory Connection with a cable lug (26) for the purpose of electrical connection with a conductor. η η 2. brush holder carrier according to claim 1, characterized in that It that the brush holder (17) on the cylindrical shaft (19) facing away from the side has an extension (22) in soften the bearing point {22 ¹ } for the metallic insert (23) and a bearing point (34) for a closure cover (33) is introduced in non-conductive material. - 10 - 7601062 1O.0R76 i. y y 'f ' i ° · -: · '; : Jan 15, 1976 ^{<Λ /} 1 π j 3. Brush holder carrier according to A ns prach 2, characterized in that (- | - ! that the cover (33) lateral extensions (33 ') for I », ■ I Snap into the associated, inner extension (22) of the f " I Barsteühalterers formed camps {34) is in * [ 4. brush holder carrier siach claim 1, characterized in that I that the cable lug (26) for a firm connection with the metal I lischen insert (23) a pointed-shaped bent outermost I part (25) has, as well as a middle, extended part I (27), which on the side of the pointed part has a I protruding part 28 for centering a Bruckferder (30) I of the brush as well as an end part (30) for a clinging to a -: electrical conductor owns. M 5. brush holder carrier according to claim 1, characterized in that that the one in the carrier (4) for connection to the shaft «
(19) of the brush holder (17) formed seat (16) from a There is a hole, the caulking parts protruding inwards (20) which partially with the shaft (19) of the brush holder (17) work together.