DE2241221A1 - SMALL ENGINE - Google Patents

Description

? 2 L 1 9 9 1

Patent attorneys Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber

8 MUNICH 27, DEN

MÖHLSTRASSE 22, CALL NUMBER 48 3921/22

St / th.

DUCELLIER et CIE, 23, Rue Alexandre-Dumas, F-75 Paris XIe / France

Small engine

The invention relates to a small electric motor, in particular for use within the electrical equipment of a motor vehicle, especially for controlling the Raising the panes in the doors or for the control mechanism the windshield wiper, which has a motor shaft elongated by a worm and a reducer, which is formed by a shaft that carries a reduction wheel, the motor means for precise control, for precise movement and functional alignment of the Has reduction wheel with respect to the screw extending the motor shaft.

Such devices can, as described in French patent specification No. 1,492,224 of the applicant, through a ball joint can be formed which has a spherical area

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includes outside on the support bearing of the screw, on which a corresponding hollow ball is pivotably supported, which is in the Support bearing of the reduction wheel - or vice versa - is attached, the two spherical areas having common centers have on the axis of the motor shaft.

This design of the devices allows the solution of the functional movement and alignment of the reduction wheel that requires however, a relatively accurate manufacture of the various bearings. .

The invention is directed to these devices and their Simplify manufacturing.

The small motor according to the invention of the type described is characterized in that the control device by a Shell is formed, the hole in which the reduction wheel is located bearing shaft rotates, is eccentric with respect to its outer wall, so that the rotation of the shell in its bearing is about a control element changes the distance between the reduction wheel and the worm.

According to a further feature of the invention, this includes Control organ devices that rotate the shell and after fixing it in relation to the bearing of the reduction device the distance between the reduction wheel and the worm.

According to a further embodiment of the invention the control member formed by an annular cap, which the end of the projecting area in the form of a bearing pin covered and the reduction shaft runs freely through its central opening. The edge of the opening of this cap is provided with at least one edge which is folded over parallel to the axis of the cap and which engages in a notch at the end the shell is provided for its rotation, the Uinfangsrand provided with a number of cutouts or slits

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is at least one corresponding to the tax position of the Shell overlaps a projecting area that radially 'auf "The outer circumference of the bearing journal is arranged so that the Shell is blocked in relation to the bearing *

Further details, features and advantages of the invention result from the following description of exemplary embodiments with reference to the accompanying drawings. ■

Pig. 1 is an illustration of the engine-transmission assembly, wherein the engine area is shown in a view and the transmission area in axial section;

Pig * 2 shows a section along the line II-II of Pig * 1;

Pig. -3 / is; a, partial view accordingly .: Pig .. 2 before -der. Blocking the pan ^ -,. . · · ...... - .; . ■■.: ■. . . · - ·.

Pig. ' 4 shows a perspective view of the control member;

Pig., 5 and 6 are partial views corresponding to Pig *. 2nd of. two further _v .Ausführungsformen of Steue.rorgans;

Pig. Figure 7 is a longitudinal section of the engine and transmission assembly;

Pig. Fig. 8 is an exploded perspective view of the pan «,""'.'""' -.... ■

The worm 1, which extends the motor shaft, meshes with one Reduction wheel 2 enclosed in a bearing 3 with a cover 4 is.

The "Ee" ^{auction wheel 2:} is firmly attached to the grooved end 5a of the reduction shaft 5, which rotates in an eyelet 6, which is attached inside an area projecting in the form of a pin 7, which the bearing 3 " extended.

The Bonrung ~ 6a of ^; Shell 6, in which the reduction mean 5 rotatesV'is 'by a "value H eccentric with respect to the outer wall 6b de ¥ ^; ShellV ^! ■' -..., .. · .-.>, ...- ... ·. _L. ■■.. -.-...

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This property makes it possible, by rotating the shell 6, ^{to shift the position of the axis XX 1 of} the reduction shaft 5 parallel to a fixed point A, which coincides with the axis of the screw 1, in order to shift a value H.

The degree of eccentricity H of the shell 6 is sufficient to the lateral To compensate for distance for alignment and adjustment, which is based on the manufacturing tolerances ", which consequently a considerable Can have size.

The possible parallel displacement of the reduction shaft 5 is advantageous for the precise setting of the reduction gear 2 in relation to the worm 1.

The arrangement of the motor-transmission group is fastened on a bracket, on which it can be fastened with the aid of fastening screws 8 is attached, which are screwed into lugs 9, which are made in one piece with the bearing 3 and with the pin 7 of the Bearing are connected by ribs 10.

The rotation of the shell 6 within the pin 7 is through a Control organ controlled.

According to a first embodiment described in Pig. 1 to 4 is shown, the control member comprises a cap 11 which engages over the free end of the pin 7 and through which the reduction shaft 5 runs through, on which it is freely movable.

The inner edge 11a of the cap is provided with two diametrically opposed tabs 12 which are parallel to the axis of the Run the cap and can engage in corresponding recesses 13 at the end of the shell 6.

The outer edge of the cap 11 has a number of cutouts 14, some of which overlap the ribs 10 and consequently the shell 6 in the direction of rotation with respect to the bearing 3 To block.

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The length of engagement of the tabs 12 of the cap 11 in the recesses 13 of the bearing 6 is greater than the engagement height of the ribs 10 in sections 14.

The control of the center distance of the reduction gear 2 is carried out as follows:

The cap 11 is brought into the position shown in Fig. 3, in which a rotation of the cap results in a rotation of the bowl 6.

The rotation of the shell 6 determines the desired position of the reduction wheel 2 in relation to the worm 1.

After the adjustment process, the cap 11 is inserted into the Pig. 2 shown Pushed back position in which some of the recesses 14 reach over the ribs 10 and so the shell 6 in the desired Block position.

A locking disk 15 holds the shell 11 axially in its clamping position.

In a second embodiment described in Pig. 5 is shown, the control member is formed by a disc 16, the inside tabs 17 corresponding to the tabs 12 of the cap 11 of the Has previously described embodiment.

After the desired setting of the reduction wheel 2 in relation on the screw 1 following the rotation of the bowl 6 with the aid of the disk 16, a part 16a of the disk is placed in a recess 18, which is provided on the outside of the journal 7 of the bearing 3.

In a further embodiment shown in FIG the control element, the shell 6A in the form of a flat rim 19, which extends the shell on the outside, and a shoulder 19a forms, which strikes against the end face of the journal 7 of the bearing 3 with the insertion of a brake disk 20.

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On the scope of the planschrandes 19 are facilities for Rotating the shell 6A is provided.

These devices can preferably be formed by a polygonal shape with a right-angled cross-section on the flange edge 19 which has surfaces 21 against which one tab 20a of the brake disc 20 can rest, while the other tab 20b of the disc rests against the recess 18 which is provided at the end of the journal 7 of the bearing 3.

In a further embodiment according to FIGS. 7 and 8, the shell 22 consists of two parts 23 and 24, which inside one are arranged in the form of a pin 7 protruding part which extends the bearing 3.

Each of the parts 23 and 24 of the shell 22 includes a bore 22a _{0 eccentric by an amount H with respect to the outer wall 22b}

A protrusion 25 is formed at one of the ends of each part so as to that the vertical surfaces 25a and 25b of the projection correspond to the corresponding surfaces 25a and 25b of the other part opposite.

The arrangement of the two parts of the shell, which extend each other, is designed so that the outer wall and the bore are aligned with one another.

A recess 26 is at least one of the parts of the end Shell formed opposite the projection 25, through which the shell part during the one-part process on the already described Control members (cap 11, disc 16) is rotated.

The bore 22a of the shell 22, in which the reduction shaft 5 rotates, is eccentric by a value H with respect to the Shell outer wall 22b.

The above description is to be adjusted as an example, and the construction can be modified in many ways.

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In particular, the coupling devices for rotation of the two parts of the shell and the shape of one part of the shell, which has a recess in polygonal ϊΌπη for the rotation may have to be modified.

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Claims (1)

Claims . !.! Small electric motor, especially for one use within the electrical equipment of a motor vehicle, mainly for controlling the lifting of the windows in the doors or for the control mechanism of the windshield wipers, the a motor shaft elongated by a worm and a reducer formed by a shaft which carries a reduction wheel, the motor means for precise control, precise movement and for functional alignment of the reduction wheel in relation to the worm extending the motor shaft, d a d u r c h characterized in that the control devices are formed by a shell (6, 22), the bore in which the reduction shaft (5) carrying the reduction wheel (2) rotates, is eccentric with respect to its outer wall, so that the Rotation of the shell within its bearing (3) via a control element (11, 16 .. ··) the distance between the reduction wheel (2) and the screw (1) changes 2, small electric motor according to claim 1, d a d u r c h g e denotes, that the control means means for rotating the shell (6, 22) and for locking it with respect to the bearing (3) of the reduction device after the adjustment of the axis spacing of the reduction wheel (2) with respect to the Comprises screw (1), 3 · Small electric motor according to one of Claims 1 or 2, characterized in that the control element is formed by an annular cap (11) which engages over the end of the part of the bearing (3) of the reduction device that protrudes in the form of a pin (7) and the reduction shaft (5) runs freely through its central opening, the edge of the opening of the cap bit being provided with at least one tab (12) bent parallel to the axis of the cap, which is inserted into a recess (13, 26) at the end of the shell 309812/0765 engages for their rotation and the peripheral wall of which is provided with a number of cutouts (14), at least of which one corresponding to the position of the shell over a protruding one Rib (10) engages, which extends radially from the periphery of the pin, so that the shell with respect to the bearing is blocked. 4. Small electric motor according to claim 1 or 2, characterized in that the control member by a Disc (16) is formed, which is mounted on the reduction shaft (5) and against the end face of the pin (7) of the bearing (3) of the reduction device rests, and the inner edge of which is provided with at least one tab (17), which is bent parallel to the axis of the disc and in engages a recess (18) provided at the end of the shell for rotation thereof, with part of the peripheral edge is bent into a recess (18) at the end of the pin. 5. Small electric motor according to claim 1, characterized characterized in that the shell (6A) to one Flange edge (19) is extended, on the scope of facilities are provided for rotating and locking the shell. 6. Small electric motor according to claim 1, characterized in that the shell (22) consists of two Parts (23, 24) is formed, the connecting means (25a, 25b) have a rotation of the one part enable the other. 7. Small electric motor according to claim 6, characterized in that the connecting devices are formed by projections (25) which are formed at one of the ends of the two parts © and engage via a corresponding projection at the end of the other part _ρ where the Parts are aligned. 09112 / 076.5 L e r s e i t e