Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-10-16
1997-12-09
Laballe, Clayton E.
Electrical generator or motor structure
Dynamoelectric
Rotary
310245, 310242, H02K 1300
Patent
active
056964188
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a commutator machine of the generic type of the main claim. A commutator machine is already known in which the brush casings are connected to the brush carrying plate by means of flexural tabs which can be plugged through through-slits in the brush carrying plate; this leads to inaccurate placement of the brushes and associated disadvantages during commutation.
ADVANTAGES OF THE INVENTION
In contrast, the commutator machine according to the invention, having the defining features of the main claim, has the advantage that an exact arrangement of the brush casings is achieved in a simple manner and without the additional bending operation. It has emerged that the measure according to the invention also produces good results in respect of the resistance to being pulled out and the resistance to changes in temperature.
Advantageous developments and improvements of the commutator machine specified in the main claim are possible as a result of the measures cited in the subclaims. It is particularly advantageous if the carrying plate is provided with accommodating slots for the guide casings on its end having the casings and the insertion slits are arranged on the base area of the slot. Furthermore, if a leaf spring-like press-on element is secured by its one end on the one casing wall and the other, free end of the press-on element bears with prestress on that side face of the brush which faces it, the result is particularly low-noise running of the commutator machine, because the brush is guided without play in its casing.
DRAWING
An exemplary embodiment of the invention is illustrated in the drawing and explained in more detail in the following description.
FIG. 1 shows a longitudinal section through a portion of a motor housing provided with a brush carrying plate,
FIG. 2 shows a plan view of the brush carrying plate in accordance with FIG. 1 and provided with only one brush,
FIG. 3 shows a partial view, in an enlarged illustration, of the brush carrying plate with a brush guide in accordance with FIG. 2, the brush being removed from the brush guide,
FIG. 4 shows a section, in an enlarged illustration, along the line IV--IV through the brush carrying plate in accordance with FIG. 3,
FIG. 5 shows a side view of the brush guide in accordance with FIG. 3,
FIG. 6 shows a section along the line VI--VI in FIG. 5 through the brush guide, in which there is drawn with dot-dashed lines that end section of a brush which is remote from the commutator,
FIG. 7 shows a view of the brush guide seen in the direction of the arrow VII in FIG. 5,
FIG. 8 shows a partial section of the brush carrying plate, with a brush guide arranged above it in a manner suitable for mounting, and
FIG. 9 shows the brush guide connected to the brush carrying plate.
DESCRIPTION OF THE EXEMPLARY EMBODIMENT
FIG. 1 shows part of a motor housing 10 which belongs to an electrical commutator machine and has a brush carrying plate 14 in addition to a receptacle 12 for an armature shaft bearing (not illustrated). The essentially ring-like brush carrying plate 14 surrounding the axis of rotation of a commutator 26 (FIG. 2) belonging to the machine is supported via rubber-elastic damping elements 16 on the inner wall 18 of the motor housing 10. The brush carrying plate 14 is provided with tubular brush casings 20 which have a square cross section and guide brushes 22 (FIG. 2) belonging to the commutation device of the commutator machine along the longitudinal axis of the tube in such a way that said brushes are placed, under load from stressed springs 23, on a contact face 24 of a commutator 26 which is indicated by dot-dashed lines in FIG. 2. The brush casings 20, which are produced from metal, are permanently connected to the brush carrying plate 14. FIG. 2 illustrates only one of the two brush casings 20. The second brush casing is not mounted. It is evident that a positioning slot 28 in the brush carrying plate 14 is shown instead. FIG. 4 illustrates this positioning slot 28 in cross section. FIGS. 3 and 4 fu
REFERENCES:
patent: 3784856 (1974-01-01), Preston
patent: 4613781 (1986-09-01), Sanders
patent: 5006742 (1991-04-01), Strobl et al.
patent: 5159222 (1992-10-01), Southall
patent: 5256925 (1993-10-01), Cutsforth
Corbach Rainer
Latz Wilhelm
Muhlemann Kurt
BT Magnet-Technologie GmbH
LaBalle Clayton E.
Striker Michael J.
Williams Timothy A.
LandOfFree
Electrical commutator machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical commutator machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical commutator machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1610142