Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-06-12
1999-09-14
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310239, 310 71, 310249, 310248, H01R 3938
Patent
active
059527633
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a brush holder plate. The plate includes guides wherein brushes are guided. The guides may be casings folded from sheet metal and mounted onto the top surface of the brush holder plate. However, there are also known brush holder plates wherein the guides are provided in the plate itself.
Frequently, the brush holder plates include connector plugs to provide an electrical connection between the brushes and outside terminals.
An object of the present invention is to provide an attachment for plugs of this type which is as simple as possible, easy to mount and ensures a reliable electrical connection between the brushes and the plugs.
SUMMARY OF THE INVENTION
To this effect, contact pins which project vertically from the top surface of the brush holder plate are reliably retained on the holder plate by pinching the sleeves. Also, there is the possibility of inserting the strands to be connected to the plug, prior to the pinching operation, from above into the sleeves so that along with the pinching operation an electrical connection between the contact pins and the brushes is produced.
To fix the contact pins axially in position on the brush holder plate, an extension of the plug is provided with a barb which extends over the upper end of the sleeve. Additionally, a rearward stop edge moves to bear against the bottom side of the brush holder plate. The distance between the stop and the barb corresponds roughly to the longitudinal extension of the hole and the sleeve so that the plug, after the sleeve is pinched, is attached to the brush holder plate so as to be secured in both axial directions.
Because the brush holder plate which is generally made of plastic material is mounted onto a bearing plate made of steel and is generally grounded, the plug 20 has a plastic cup seal in the area which extends through the bearing plate. The plastic seal may additionally be used as a counterpiece for the counterplug to be mounted onto the plug.
The present invention will be explained in detail by way of five Figures.
BRIEF DESCRIPTION OF THE INVENTION
In the drawings,
FIG. 1 is a top view of a brush holder plate;
FIG. 2 is a cross-section taken through a brush holder plate;
FIGS. 3a-3c show a top view, a side view and a cross-sectional view of a contact pin.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a plastic brush holder plate 1 which is mounted onto a bearing plate 2. On the side of the brush holder plate 1 remote from the bearing plate 2, two casings 3, 4 are attached in which brushes 5 and 6 are guided. The casings 3, 4 are aligned towards a central aperture in the brush holder plate 1 through which the motor axis with a collector extends.
The brushes 5 and 6 are provided with strands 17, 18 which are used for the current supply.
As can be seen in the cross-section of FIG. 2, the brush holder plate includes mounting hooks 10 which are used to retain electric components, such as anti-interference coils, on the brush holder plate.
Several holes 11, 12, 13, 14 are provided in the brush holder plate on which sleeves 15, 16 are partly inserted. The sleeves project vertically from the plane of the brush holder plate, as can be seen in FIG. 2. The sleeves are realized by so-called tubular rivets.
The sleeves, among others, are used as joints to connect the strands 17, 18 of the carbon brushes with connecting wires of the other electronic structural elements. To this effect, the wires or strands to be connected are either welded to the sleeves, or slipped into them, and an electrical connection is produced by pinching and/or welding the sleeve.
As will be explained in the following, the additional objective of the sleeves of the present invention is to establish connections to contact pins 20 by which the motor is supplied with current from outside the system. The contact pins 20 (one of which is shown in FIG. 2) are slipped into the sleeve over part of their length. Subsequently, the sleeve is pinched, whereby a reliable connection of the sleeve
REFERENCES:
patent: 4329605 (1982-05-01), Angi et al.
patent: 4398135 (1983-08-01), Busch et al.
patent: 4851730 (1989-07-01), Fushiya et al.
patent: 5227685 (1993-07-01), Krouse
patent: 5414318 (1995-05-01), Shimizu et al.
ITT Manufacturing Enterprises Inc.
Lam Thanh
Lewis J. Gordon
Ramirez Nestor
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