Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-12-30
2000-09-19
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310239, H02K 1100, H01R 3938
Patent
active
061217026
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention relates to an electric motor having a preferably cup-shaped motor housing and a contacting device for supplying electrical energy from outside to corresponding motor parts.
Electric motors of this type are widely known. They typically include a cup-shaped motor housing, which is closed off by a cap mounted on top. Beforehand, the necessary electrical components are inserted into the interior of the housing; in a direct current motor, these include a commutator and brushes that contact it.
The supply of electrical energy to the brushes is effected by cables which are fixed on the brushes, for instance by soldering, and which extend through a recess or notch, typically open on its periphery, in the motor housing and are thus extended to the outside. Hence during the motor mounting process, with the cap not yet attached, these connection lines have to be secured and pulled to the outside. If these connection lines are not long enough to be carried directly to the energy source, then they are connected to additional supply lines.
However, connecting cables outside the motor housing has major disadvantages, in terms of liquid-tight sealing, over connection in the interior of the motor housing, which is already intrinsically sealed hermetically.
If correspondingly longer connection lines are used, there is the disadvantage of a loss of flexibility, to the extent that if not properly inserted or if the connections are changed, and if the aforementioned external connection is to be avoided, then the motor housing has to be opened and new connection lines have to be inserted.
ADVANTAGES OF THE INVENTION
The electric motor of the invention has the advantage over the prior art that connecting the connection lines to the brushes is possible even after mounting of the motor and with the cap in place on it. Moreover, the connection of the brushes with the connection lines coming from outside is located in the interior of the motor housing, so that the sealing of the housing is also utilized for this connection. Thus costs can be reduced, without impairing the connection flexibility or the tightness of the housing.
Because the contacting device includes at least one busbar disposed in the interior of the housing, and this busbar is disposed so that it can be displaced outward through an opening in the housing wall, the connection lines can be secured even when the motor housing is closed. All that is needed is for the busbar to be pulled at least partway outward, and then pressed back inside again after the connection with the connection line is made.
The busbars are preferably disposed such that they are shiftable radially to the cup-shaped motor housing. The busbars are preferably guided in a retainer disposed in the interior of the housing, so that shifting is possible in only a single plane.
The electrical supply to the brushes is effected via electrical lines, which are inserted or welded or soldered, preferably on the inner end of the busbar, into a clamp device mounted there. This allows a simple connection to be achieved.
The connection with the connection cable is effectively accomplished at a connection portion of the busbar that extends perpendicular to the shifting direction. The connection is made by screwing, for instance, or welding or soldering, or by means of a plug contact.
The busbar is preferably provided with a protuberance, which cooperates with a corresponding protrusion in the retainer, so as to form a snap closure. The disposition of the protuberance and the protrusion is effected such that the busbar snaps into place in the inserted position. Unintended shifting of the busbar is thus prevented.
The embodiment of a region of the retainer as a sliding bed, in which the busbar is located and which guides the busbar on at least three sides, is especially advantageous.
Further advantageous features of the invention will become apparent from the details set forth herein.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in further detail in terms of a
REFERENCES:
patent: 1792044 (1931-02-01), Seyfried
patent: 3012159 (1961-12-01), Druesedow
patent: 3842302 (1974-10-01), Apostoleris
patent: 3967148 (1976-06-01), Walsh
patent: 4381468 (1983-04-01), Adam et al.
patent: 4677333 (1987-06-01), Auzolat et al.
patent: 5304880 (1994-04-01), Hisada et al.
patent: 5675307 (1997-10-01), Krimm et al.
patent: 5705868 (1998-01-01), Cox et al.
patent: 5886448 (1999-03-01), Yoshida
patent: 5889345 (1999-03-01), Iwata et al.
patent: 5903072 (1999-05-01), Phillips
Bitzer Harold
Braun Wilhelm
Huber Martin
Tischer Michael
Dinh Le Dang
Greigg Edwin E.
Greigg Ronald E.
Ramirez Nestor
Robert & Bosch GmbH
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