DE2016789B2

DE2016789B2 - Electrical machine, especially low-power motor, with a spherically shaped bearing bush

Info

Publication number: DE2016789B2
Application number: DE19702016789
Authority: DE
Inventors: Roger Epinay Sur Seine Habert (Frankreich)
Original assignee: DUCELLIER ET CIE CRETEIL VAL-DE- MARNE (FRANKREICH)
Current assignee: DUCELLIER ET CIE CRETEIL VAL-DE- MARNE (FRANKREICH)
Priority date: 1969-04-09
Filing date: 1970-04-08
Publication date: 1979-08-09
Also published as: BE747268A; ES378359A1; NL7004730A; DE2016789A1; FR2040685A5; GB1241395A

Description

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigtAn embodiment of the invention is shown in the drawing. It shows

Fig. 1 die Seitenansicht eines Motors, Fig. 2 eine kollektorseitige Frontansicht des in Fig. 1 dargestellten Motors,1 shows the side view of a motor, FIG. 2 shows a collector-side front view of the in Fig. 1 engine shown,

Fig. 3 eine auseinandergezogene Darstellung der Kabelanschlußvorrichtung,Fig. 3 is an exploded view of the cable connection device,

Fig. 4 eine auseinandergezogene Darstellung des Lagers au£ der Kollektorseite.Fig. 4 is an exploded view of the bearing on the collector side.

Die in den Figuren dargestellte elektrische Maschine wird vorzugsweise als Motor in der Autoindustrie verwendet, beispielsweise zum Antrieb der Scheibenwischer, des Fensterhebers oder des Ventilators für die Klimaanlage.The electrical machine shown in the figures is preferably used as a motor in the automotive industry, for example to drive the Windscreen wipers, the window regulator or the fan for the air conditioning.

In dem zylindrischen StatorgeMuse 1 sind mit Wicklungen versehene Polstücke (die nicht im Detail gezeigt sind) befestigt. Auf den zwei Außenseiten des Statorgehäuses 1 sind Lagerschilde 2 und 3 mit Schrauben 4 und 5 befestigt und tragen eine WeDe 6 mit dem Anker 7 des Motors und dem Kollektor 8.In the cylindrical stator housing 1 are pole pieces provided with windings (which are not shown in detail are shown). On the two outer sides of the stator housing 1, end shields 2 and 3 are with Screws 4 and 5 are attached and carry a WeDe 6 with the armature 7 of the motor and the collector 8.

Die Schraube 5, welche zur Befestigung der Lagerschilde 2 und 3 dient, ist gleichzeitig zur Halterung einer Kabelanschhißvorrichtung 9 für ein Kabel 13 verwendet, die aus Plastikmaterial wie Kautschuk oder aus anderem Isoliermaterial bestehen kann. Wie aus Fig. 3 ersichtlich, hat eine Lasche 10 an beiden Seiten einer Seitenfläche zwei etwa parallel verlaufende Nuten 11 und 12, die derart abgesetzt sind, daß in den Nutenteilen 11α und 12α die Enden der Isolation der Kabeldrähte 13 und in die Nutenteile 116 und 12b, die von der Isolation entblößten Drahtenden des Kabels eingelegt werden können. Die Nutenteile lic und 126 der Nuten 11 und 12 dienen zur Aufnahme von Verbindungsleitungen zu den Bürsten. Ein Deckel 14 bildet eine Abdeckung für die Drähte, die auf die Lasche 10 aufgesetzt werden kann; die Schraube 5 ist durch Bohrungen 16,15 in der Lasche 10 bzw. dem Deckel 14 geführt.The screw 5, which is used to attach the end shields 2 and 3, is also used to hold a Kabelanschhißvorrichtung 9 for a cable 13, which can consist of plastic material such as rubber or other insulating material. As can be seen from Fig. 3, a tab 10 has on both sides of a side surface two approximately parallel grooves 11 and 12, which are offset in such a way that the ends of the insulation of the cable wires 13 in the groove parts 11α and 12α and in the groove parts 116 and 12b, the wire ends of the cable exposed from the insulation can be inserted. The groove parts lic and 126 of the grooves 11 and 12 are used to accommodate connecting lines to the brushes. A cover 14 forms a cover for the wires, which can be placed on the tab 10; the screw 5 is guided through bores 16, 15 in the bracket 10 or the cover 14.

Wie aus Fig. 4 ersichtlich, sind an der Nabe 2a des Lagerschildes 2 mittels derselben Nieten 17 und 18 ein Bürstenträger 19 und ein Trägerflansch 20 befestigt.As can be seen from Fig. 4, are at the hub 2a of the A brush holder 19 and a carrier flange 20 are attached to the bearing plate 2 by means of the same rivets 17 and 18.

Auf dem Trägerflansch 20, der die Nabe 2a teilweise bedeckt und an der Außenseite des Lagerschil-On the carrier flange 20, which partially covers the hub 2a and on the outside of the end shield

des 2 anliegt, sind drei Schraubenbolzen 21 befestigt, die voneinander etwa äquidistanten Abstand haben und zur Befestigung des Motors an dem Fahrzeug dienen. Der Borstenträger 19 besteht aus Isoliermaterial und wird zweckmäßig aus Plastikmaterial gegossen. Er weist eine zentrale Scheibe 22 auf, die zur Durchführung der Welle 6 einen zentralen Wellendurchlaß 22b enthält An der zentralen Scheibe 22 sind diametral gegenüberliegend zwei Halterungen 23,24 für die Bürsten vorgesehen, die unter dem Druck von Federn 25 in Kontakt mit dem Kollektor stehen. Die Federn 25 werden in den Halterungen 23, 24 mit Hilfe von Kontaktklammern 26 aus Plastikmaterial gehalten, die auf den offenen Enden der Halterungen 23, 24 aufgeklemmt werden und mit zwei angeformten Nokken 27, 28 in öffnungen 29,30 in den Seitenwänden der Halterungen einrasten.des 2 is applied, three screw bolts 21 are attached, which are approximately equidistant from one another and are used to attach the engine to the vehicle. The bristle carrier 19 consists of insulating material and is expediently cast from plastic material. It has a central disc 22, which contains a central shaft passage 22b for the passage of the shaft 6. On the central disc 22, diametrically opposite two holders 23, 24 are provided for the brushes, which are in contact with the collector under the pressure of springs 25 . The springs 25 are held in the brackets 23, 24 with the aid of contact clips 26 made of plastic material, which are clamped onto the open ends of the brackets 23, 24 and snap into openings 29,30 in the side walls of the brackets with two molded cams 27, 28 .

Auf der kollektorfernen Seite der zentralen Scheibe 22 des Bürstenträgers 19 ist eine zu dem kreisförmigen Wellendurchlaß 22b koaxiale Ausnehmung 22a vorgesehen, die zur Aufnahme einer kollektornahen metallischen Lagerschale 33 dient, die als Kreisring mit radial nach innen gerichteten federnden Zungen 34 ausgebildet ist und ein sphärisch konkaves Bett für eine selbstschmierende kugelige Lagerbüchse 32 bildet; diese sitzt mit ihrem anderen, kollektorfernen Ende in einer sphärisch geformten Lagerausnehmung 31 in der Nabe 2a des Lagerschildes 2. Der Bürstenträger 19, das Lagerschild 2 und der Trägerflansch 20 sind mit Bohrungen 22c, 2b und 20a versehen, durch die die Befestigungsnieten 17 und 18 geführt sind; alle Teile dieses Verbundes, also auch die Lagerbüchse 25 und die Lagerschale 33, stehen untereinander unter federndem Andruck infolge der Federeigenschaft der Lagerschale 33, so daß ein spielfreier Zusammenhalt jederzeit gesichert ist.On the side of the central disk 22 of the brush holder 19 remote from the collector, a recess 22a is provided which is coaxial with the circular shaft passage 22b and serves to accommodate a metallic bearing shell 33 close to the collector, which is designed as a circular ring with radially inwardly directed resilient tongues 34 and a spherically concave one Forms a bed for a self-lubricating spherical bearing bush 32; the other end remote from the collector sits in a spherically shaped bearing recess 31 in the hub 2a of the bearing plate 2. The brush holder 19, the bearing plate 2 and the carrier flange 20 are provided with bores 22c, 2b and 20a through which the fastening rivets 17 and 18 are led; all parts of this composite, including the bearing bush 25 and the bearing shell 33, are under resilient pressure among one another as a result of the spring property of the bearing shell 33, so that play-free cohesion is ensured at all times.

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims

Patent claims:

1. Electrical machine, especially low-power motor, with a collector-side The self-lubricating, spherically shaped bearing bushing that surrounds the end of the rotor shaft and is attached to its The end remote from the collector in a spherically shaped bearing recess on the collector side Bearing shield and at its end near the collector in a spherically concave-shaped resilient The bearing shell is held, furthermore with fastening means arranged on the bearing plate on the collector side for the machine, characterized by the following features:

a) the fastening means (21) for the machine are attached to a special support flange (20) which sits on the outside of the hub (ία) of the bearing plate (2) and can be connected to this (2a) ;

b) the near-collector bearing shell (33) for the bearing bush (32) lies on a central one Washer (22) of the brush holder (19) made of insulating material;

c) the carrier flange (20), the hub (2a) of the end shield (2) and the central disc (22) of the brush holder (19) have matching bores (20a or 26 or 22c) and are secured by bolts or rivets (17, 18) leading through these holes connectable to each other under a spherically concave shaped bearing shell (33) caused spring pressure.

2. Electrical machine according to claim 1, characterized in that the collector-near bearing shell (33) is designed as a circular ring with radially inwardly directed tongues (34) which form a spherically concave bed for the spherically shaped bearing bush (32), and that the The central disc (22) of the brush holder (19) has a recess (22a) which is concentric to the shaft passage (22b) and which receives the circular ring of the bearing shell (33) close to the collector.

3. Electrical machine according to claim 1 or 2, characterized in that on the collector near Side of the central disc (22) of the brush holder (19) two diametrically opposite Holders (23,24) for the brushes pressed against the collector (8) by means of springs (25) are attached, and that the holders (23, 24) open at their ends by contact clips (26) made of plastic material, which can be clamped onto the ends of the brackets and can be locked there.

4. Electrical machine according to one of claims 1 to 3, characterized in that a of several screws (5) with which the end shields (2, 3) are attached to the stator housing (1) are, at the same time holds a cable connection device (9).

5. Electrical machine according to one of claims 1 to 4, characterized in that the Fasteners for the machine are screw bolts (21) that are firmly attached to the carrier flange (20) are connected.

The invention relates to an electrical machine according to the preamble of claim 1.

In such, known from DE-AS 1178506 Machine is the entire collector-side bearing from a bearing plate, which also includes the fastening means for the machine and has a dome-shaped bearing bulge, the spherically shaped Bearing bush, a dome-shaped ring spring and a retaining plate assembled by means of spot welding; the disc-shaped brush holder is held by projections in the Z-shape from the The bearing shield are punched and bent out and threaded through the corresponding slots in the brush holder, then, after interlocking, hold it in contact with both of its sides; there are therefore with welding, Threading and entangling three assembly steps in a row is also required a clearance-free line under pressure at the brush holder cannot be reached reliably. But above all, it must be used if a different type of fastening of the machine is required will, the entire collector-side bearing plate will be redesigned accordingly.

The invention is based on the object of improving the known electrical machine in such a way that that production and assembly of the components are easier and with fewer steps and if the fastening means of the machine are changed, the smallest possible changes to the Machine parts must be made.

This object is achieved according to the invention by the features in the characterizing part of the claim 1. Advantageous embodiments of the invention are characterized in the subclaims.

The invention brings with it the essential technical progress that with a change in the type of fastening of the machine, unlike the known machine, the entire end shield is different must be designed, but only the arrangement the fastening means must be adapted to the separate support flange. Furthermore is through clamping together the end shield, the bearing bush, the resilient bearing shell and the central one Washer of the brush holder now also the brush holder in the composite which is under spring pressure included, which simplifies assembly and manufacture, because there are now no need Z-shaped projections from the end shield and no more slots punched out of the brush holder and to be bent, and also eliminates the need to thread four projections in at the same time four slots and the subsequent interlocking of the legs protruding from the slots, in which moreover, a reliably play-free engagement of the brush holder on the end shield is not ensured. According to of the invention are all of the aforementioned parts by z. B. two rivets adjusted to each other and then riveted while tensioning the resilient bearing shell, so that now instead of three assembly steps only one is required.