DE3045255C2

DE3045255C2 - Device for fastening a recessed end flange of an electric motor to its housing cylinder

Info

Publication number: DE3045255C2
Application number: DE19803045255
Authority: DE
Inventors: Alfred Bruno Venissieux Mazzorana
Original assignee: PARIS ET DU RHONE 69008 LYON RHONE FR Ste
Current assignee: PARIS ET DU RHONE 69008 LYON RHONE FR Ste
Priority date: 1979-12-12
Filing date: 1980-12-01
Publication date: 1983-12-22
Also published as: ES263223Y; GB2068649B; FR2471688A1; ES263223U; DE3045255A1; GB2068649A; FR2471688B1

Description

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnetAdvantageous refinements of the invention are characterized in the subclaims

Die" Erfindung wird nachfolgend anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert In der Zeichnung zeigtThe "invention is explained in more detail below with reference to the exemplary embodiment shown in the drawing explained In the drawing shows

Fig. 1 eine Außenansicht eines elektrischen Anlassermotors in einem kleineren Maßstab, der mit der erfindungsgemäßen Vorrichtung ausgestattet ist,Fig. 1 is an exterior view of an electric starter motor on a smaller scale which is compatible with the device according to the invention is equipped,

F i g. 2 eine Seiisnansicht der Vorrichtung von F i g. 1, in Richtung des Pfeils F, F i g. Figure 2 is a side view of the device of Figure 2. 1, in the direction of arrow F,

Fi g. 3 eine Längsschnittansicht der Befestigungsvorrichtung, Fi g. 3 a longitudinal sectional view of the fastening device,

Fig.4 eine auseinandergezogene, perspektivische Ansicht eines erfindungsgemäß ausgebildeten Hakens und eines Teils eines tiefgezogenen Flansches, mit dem '5 der Haken zusammenwirkt,Fig. 4 is an exploded perspective View of a hook designed according to the invention and part of a deep-drawn flange with which '5 the hook cooperates,

Fig.5 eine Schnittansicht längs der Linie V-V in Fig. 3,Fig. 5 is a sectional view along the line V-V in Fig. 3,

Fig.6 eine Teilansicht von Fig. 1, in Richtung des Pfeils F, die eine andere Ausführungsform des erfinuungsgeiüaßen Hakens zeigt, und6 is a partial view of FIG. 1, in the direction of arrow F, showing another embodiment of the hook according to the invention, and FIG

Fig.7 eine Schnittansicht längs der Linie Vii-VII in Fig. 6.7 shows a sectional view along the line Vii-VII in Fig. 6.

F i g. 1 zeigt einen Anlasser für einen Verbrennungsmotor, der ein Gehäuse 1 aufweist, mit dem ein Elektromotor 2, ein Kontaktgeber 3 und eine Nase 4 verbunden sind. Letztere trägt ein Lager 4a für eine Welle 5, auf der sich ein mit einem Ritzelrad 6 versehenes Antriebsrad verschieben kann, wobsi das Ritzelrad mit dem großen Zahnkranz des Verbren- » nungsmotors zusammenwirkt.F i g. 1 shows a starter for an internal combustion engine, which has a housing 1 with which a Electric motor 2, a contactor 3 and a nose 4 are connected. The latter carries a bearing 4a for one Shaft 5 on which a drive wheel provided with a pinion wheel 6 can move, wobsi the Pinion gear interacts with the large ring gear of the internal combustion engine.

Der Elektromotor 2 sitzt auf einem Kragen la des Gehäuses 1 mit Hilfe dreier Zugstangen 7, die zum Zusammenbau eines Endflansches 8 mit dem Gehäusezylinder 9 des genannten Motors dienen. Der Flansch 8 ^ besteht zweckmäßigerweise aus einem tiefgezogenen Teil, hergestellt aus einem ebenen Stahlblech. Er trägt in seiner Mitte ein Lager 8a für die Welle 10 des Rotors des Elektromotors.The electric motor 2 sits on a collar la of the housing 1 with the aid of three tie rods 7 which are used to assemble an end flange 8 with the housing cylinder 9 of the said motor. The flange 8 ^ expediently consists of a deep-drawn part made from a flat sheet steel. In its center it carries a bearing 8a for the shaft 10 of the rotor of the electric motor.

Diese ZugsUnge 7 ist mit einem ihrer Enden in den Kragen la eingeschraubt, während ihr entgegengesetztes Ende mit einem Kopf 7a versehen ist, der auf ein erfindungsgemäß ausgebildetes Befestigungselement 11 (F i g. 3) einwirken kann.This ZugsUnge 7 is with one of its ends in the Collar la screwed, while its opposite end is provided with a head 7a, which on a according to the invention designed fastening element 11 (Fig. 3) can act.

Jedes dieser Befestigungselemente 11 besteht, wie in ·»"> F i g. 4 zu seilen, aus einem V-förmig gebogenen Blech mit abgemndetem Boden, so daß sich die entsprechende Zugstange 7 so nahe wie möglich am Umfang des Gehäusezylinders 9 befindet. In Höhe eines der Enden jedes Befestigungselememes ist jeder seiner Arme " durch einen Haken 12 bzw. 13 verlängert, dessen wirksame Ku,nte 12a, 13a schräg verläuft und mit einem Aushakelement 126,136 verbunden ist, das sich auf der oberen Kante der Arme des V befindet, wobei die Verbindung abgerundet ist. Man erkennt, daß das *" äußere Ende jedes Befestigungselementes, das sich in Höhe der Haken befindet, leicht einspringt, so daß zwei Nasen 12c, 13c gebildet werden, die eine unter dem Kopf 7a befindliche Unterlegscheibe 14 festhalten und zentrieren können.Each of these fastening elements 11 consists, as in · »"> F i g. 4 to rope, from a V-shaped bent sheet metal with a walled bottom, so that the corresponding Pull rod 7 is located as close as possible to the circumference of the housing cylinder 9. Equal to one of the ends each fastening element is each of its arms "extended by a hook 12 or 13, of which effective Ku, nte 12a, 13a runs obliquely and with a Unhooking element 126,136 is connected, which is located on the upper edge of the arms of the V is located, the connection being rounded. You can see that the * " outer end of each fastening element, which is located at the level of the hooks, slightly jumps in, so that two Lugs 12c, 13c are formed which hold a washer 14 located under the head 7a and can center.

Der Boden 86 des Flansches 8 ist mit ebenso viele» Vertiefungen 15 versehen, wie Zugstangen 7 vorhanden sind. Jede Vertiefung weist mindestens eine schräge Wand 15a auf, die parallel zum Umfang des genannten Bodens 86 verläuft und deren Neigung identisch ist mit derjenigen der Kanten 12a, 13a der Haken 12,13. Wenn sich somit der Haken an der in F i g. 3 gezeigten Stelle befindet, bewirkt die Preßkraft oder Klemmkraft der Stange, daß die geneigten Kanten 12a, 13a des Hakens auf der entsprechenden Fläche 15a der Vertiefung 15 so anliegen, daß durch diese Klemm- oder Preßkraft der Gehäusezylinder 9 in einem Futter \b des Kragens la zur Anlage kommt, wodurch die axiale Verbindung des Flansches am entgegengesetzten Ende des Gehäusezylinders 9 in einem dort befindlichen Futter 9a bewirkt wird. Die genannte Preß- oder Klerjimkraft bewirkt außerdem infolge der Neigung der Haken und der Neigung der entsprechenden Fläche der Vertiefungen, daß ein Moment erzeugt wird, das ';estrebi ist, die Stangen 7 gegen den Gchäusczyiindcr sx-. führen, was bedeutet, daß die Aushakelemente 126,136 der Haken gegen den Umfang des Mantels 8c des Flansches bewegt werden und gleichermaßen mit den Bereichen 11a und 116 der Flügel des Befestigungselementes 11 gegenüber den Haken 12,13 auf dem Lager rechts vom Futter 9a des Gehäusezylinders zur Anlage kommen.The bottom 86 of the flange 8 is provided with as many »recesses 15 as there are tie rods 7. Each recess has at least one inclined wall 15a which runs parallel to the periphery of said bottom 86 and whose inclination is identical to that of the edges 12a, 13a of the hooks 12, 13. Thus, if the hook is on the one shown in FIG. 3 is located, the pressing force or clamping force of the rod causes the inclined edges 12a, 13a of the hook to rest on the corresponding surface 15a of the recess 15 so that by this clamping or pressing force, the housing cylinder 9 in a chuck \ b of the collar la comes to rest, whereby the axial connection of the flange at the opposite end of the housing cylinder 9 is effected in a chuck 9a located there. Said pressing or clerical force, due to the inclination of the hooks and the inclination of the corresponding surface of the indentations, also causes a moment to be generated which is'; estrebi, the rods 7 against the Gchäusczyiindcr sx-. lead, which means that the unhooking elements 126,136 of the hooks are moved against the circumference of the jacket 8c of the flange and likewise with the areas 11a and 116 of the wings of the fastening element 11 opposite the hooks 12,13 on the bearing to the right of the chuck 9a of the housing cylinder Plant come.

Man erkennt, daß die Wirkungsbereiche der Haken in einer Querebene liegen, die sich im wesentlichen in der Ebene des besagten Mantels befindet, so daß jegliche Verformung des Flansches vermieden wird, einschließlich die Biegung seines Bodens, die zu einer Verschiebung des Lagers 8a führen könnte. Aus Fig.5 ergibt sich, daß die beiden Flächen 156, 15c jeder Vertiefung 15, die sich an den Enden der Fläche 15a der Vertiefung anschließen, einen Abstand aufweisen, der etwa gleich dem Abstand des äußeren Teils der Haken 12, 13 des Befestigungselementes 11 ist, so daß die Klemm- oder Preßkraft jeder Zugstange den diesbezüglichen Haken keinen solchen Abstand verleihen kann, daß die Haken an df-.τ entsprechenden Flächen 156, 15c anstoßen, wodurch ihre zu starke Verformung verhindert wird.It can be seen that the areas of action of the hooks lie in a transverse plane that is essentially in the Plane of said shell so that any deformation of the flange is avoided, including the bending of its bottom, which could lead to a displacement of the bearing 8a. From Fig.5 results that the two surfaces 156, 15c of each recess 15, which are at the ends of the surface 15a of the recess connect, have a distance which is approximately equal to the distance between the outer part of the hooks 12, 13 of the Fastening element 11 is so that the clamping or Pressing force of each pull rod can not give the relevant hook such a distance that the hook butt against surfaces 156, 15c corresponding to df-.τ, thereby preventing their excessive deformation.

Wie aus Fig.6 ersichtlich, kann jede Vertiefung 15 die Form eines schmalen Hohlraums 16 aufweisen, der im Querschnitt abgerundet ist, wobei dann die Haken 12, 13 jedes Befestigungselementes 11 komplementär geformt sind. Es ist darauf hinzuweisen, daß die Vertiefungen 15 und die schmalen Hohlräume 16 die Form einer ununterbrochenen ringförmigen Nut oder Riile haben können, wodurch jedoch nicht der oben erwähnte Vorteil erreicht wird, nämlich die Haken am Auseinanderstreben zu hindern.As can be seen from FIG. 6, each depression 15 have the shape of a narrow cavity 16, which is rounded in cross-section, in which case the hooks 12, 13 of each fastening element 11 are shaped complementarily. It should be noted that the Depressions 15 and the narrow cavities 16 take the form of an uninterrupted annular groove or Riile can have, but this does not achieve the advantage mentioned above, namely the hooks on To prevent drifting apart.

Es versteht sich, daß die Verbindung zwischen der geneigten Kante 12λ. 13,7 jedes Hakens und dem entsprechenden Aush'ikelemeni 126 so angeordnet sein muß, daß sie nicht am Umfang des Bodens 86 des Flansches 8 zur Anlage kommt. Zu diesem Zweck muß der Radius kleiner oiler höchstens gleich demjenigen der komplementärer. ΪΌπιι des genannten Bodens sein.It is understood that the connection between the inclined edge 12λ. 13.7 of each hook and that corresponding Aush'ikelemeni 126 be arranged must that it does not come to rest on the periphery of the bottom 86 of the flange 8. For this purpose must the radius of the smaller oiler is at most equal to that of the complementary one. Be ΪΌπιι of said soil.

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims

Patent claims:

1. Device for fastening a recessed end flange of an electric motor to its housing cylinder with the aid of connecting means, each of which has a fastening element belonging to a tie rod and in the form of a hook, the sloping edge of which cooperates with the diverging edge of a recess which in the bottom of the flange is formed, characterized in that the fastening element (11) co-operating end projecting at its the bottom (8b) of the flange (8) one against the flange, the Flanschboden cross-hook (12, 13) up a has , connected to the shaft-shaped wings (Ua, iib ) running parallel to the tie rod (7), which are provided on their edges facing the housing cylinder (9) with projecting hooking elements ^ {12 />, 136 ^, which are provided under the effect the tensile force of the corresponding tie rod (7) on the jacket (8c) of the flange (8) when the flange (8) is assembled at right angles t support the chuck (9a) of the housing cylinder (9).

2. Device according to claim 1, characterized in that the unhooking elements (\ 2b, 130j on the jacket (8c) of the flange (8) bear at right angles to its bottom (8b) .

3. Apparatus according to claim 2, characterized in that the effect of all inclined edges (12a, i3a) of the hooks (12,13) is developed as close as possible to the plane aes circumferential jacket (Sc) of the flange (8).

4. Apparatus according to claim!, Characterized in that each fastens! , gselement (11) the JS Has the shape of a sheet metal bent at a V-shaped angle, which has a rounded bottom owns and in which each wing terminates in a hook (12, 13).

5. Device according to claim 4, characterized marked * o characterized in that each hook (12, 13) has a nose (12c, 13CJ which serves for centering a washer (14).

6. Device according to claim 1, characterized in that each flange (8) as many deepen ⁴ ^ levies (15) having as tie rods (7).

7. Apparatus according to claim!, Characterized in that each flange (8) has a single annular recess with which the hooks cooperate. v>

8. Apparatus according to claim 6, characterized in that the lateral edges (156, ISc ^ each Recess (15) are designed so that they are for the two hooks (12, 13) of the corresponding fastening element (11) form a stop.

9. Device according to one of claims 1 to 8, characterized in that each tie rod with a second fastening element (13) is provided with a second flange or a analog element (la ^ cooperates.

10. The device according to claim 2, characterized in that the transition of the inclined edge (12a, 13a,) of each hook to the corresponding unhooking element (126, 136,) is such that it is not at the connection between the jacket (8c) and the bottom (8b) of the flange (8) come to rest.

The invention relates to a device for fastening a recessed end flange of an electric motor on its housing cylinder according to the preamble of claim 1. By the known device of mentioned type (FR-PS 20 99 148) is used when attaching the end flange to the housing detonator an electric motor neither an adjustment of the tension of the fastening straps or straps in the desired scope and with the desired simplicity, still ruled out that with Deformation forces are transmitted to the motor housing of the fastening, which affects the axial alignment adversely affect the rotor shaft bearings. In addition, the hooks of the fasteners are these Device particularly disadvantageous because it hits the edge of the end flange of the motor housing Apply a moment of force that bends the flange outward. The wall thickness of the component must therefore be particularly large in order to absorb these bending moments without adverse effects on the motor shaft bearings take up cylindrical housing.

A releasable connection between a hood attachment and a machine housing is also known (DE-OS 21 35 653), with which, however, no elimination or avoidance of the bending moments is intended, by screwing the hood attachment onto the housing or eyelets with the latter in a clamped connection standing locking hooks arise, but narrow manufacturing tolerances should be avoided, in order to achieve a reduction in manufacturing costs. With this fastening device the existing one becomes the existing one by tightening a screw while compressing a seal accordingly Locking hook around the peripheral edge of a stiffening element at the outermost end of the upper The wall of a slot-shaped recess is subject to bending, with the seal also being used located part of the flange-like reinforcing element itself a counterclockwise direction Performs deformation movement if it is not extremely stable, i.e. H. designed with the appropriate macerial thickness is. To avoid this for the mutual alignment of the bodies to be connected to one another disadvantageous deformation of the flange-like body to be connected, the latter must be considerable Material thickness obtained, as a comparison of the wall thicknesses of the housing with the flange bodies shows.

The object of the invention is therefore to provide the Forming fastening device of the type mentioned so that any deformation of the flange and thus also its bottom when tightening the tie rods is avoided, which leads to a displacement of the bearing the rotor shaft of the electric motor.

This object is achieved according to the characterizing part of claim 1. By the invention Construction is achieved that the tie rods develop pressing forces or clamping forces that the bring the inclined edges of the hooks to rest on the side surfaces of the recesses in the flange base, due to the inclination of the hooks and the inclination of the corresponding surfaces of the recesses a moment is generated by which the tie rods are guided against the housing cylinder and thus also the unhooking elements against the circumference of the flange jacket. The level of action of the hook becomes thereby relocated in the planes of the jacket, so that the undesirable deformation of the flange and his Soil is omitted.