Device for moving sliding windows, especially in motor vehicle doors, with a crank drive and an electric motor, switchable drive

Description

The crank is directly or indirectly coupled to the output gear, pulley or the like for the movement mechanism in a form-fitting manner. In the device according to the invention, the axial displacement of the movement mechanism engaging with the window is The output gear, pulley, or similar components are avoided, further enhanced by the extremely simple design of the device. Moreover, the The device, positioned towards the door thickness next to the movement space for the window pane, leaves very little room and ultimately allows its use a removable crank as well as a non-removable crank, which, however, does not rotate with the electric motor drive. All The essential coupling components are arranged either on the crankshaft, which is necessary in itself, or on the output gear, without the need for an additional Space would be required for the entire, already very compact construction. To couple the hand crank with the output gear, which Pulleys or the like can expediently have interlocking claws on both parts to be coupled, facing each other. For the same purpose, however, the hand crank can advantageously have a shaft attachment with a part that is non-circular, possibly square. The cross-section and the hollow shaft have an end section with a corresponding cross-section. Another design according to the invention for this second type of coupling can be seen in the fact that the crankshaft in this case consists of two It consists of parts, one of which is firmly connected to the hand crank and another of which has a non-circular cross-section. The subsequent section is formed with a thinner approach, while the other consists of a short crankshaft section with an axial A bore for the attachment exists. Here, the attachment of the part to the hand crank can expediently be a radial blind hole with a spring and a The ball bearing is pressed against the inner wall of the hollow shaft as a safeguard against unintentional axial displacement of the hand crank. The ball can then snap into a recess in the inner wall of the hollow shaft. Another design according to the invention provides that the output gear has two lateral disc-shaped projections which Guide the tooth segment of the movement mechanism that engages the window. They can be formed in one piece with the output gear. Another embodiment of the invention provides that the cantilevers consist of two disc-shaped molded pieces. Finally, the output gear with the projections can be advantageously protected against a leaf spring between the output gear and the housing. The hollow shaft is pressed into a concentric support, and this support consists of a ring that is partially inserted into an annular groove on the circumference of the hollow shaft and with its section protruding from the hollow shaft in an annular groove of the output gear or the disc-shaped one, with which The output gear is connected to the cantilever. Further features of the invention will become apparent from the description of exemplary embodiments illustrated in the drawings, insofar as they are described by The claims are covered. It shows this in schematic sketches. Fig. 1 a device in the position during motor operation in axial section, Fig. 2 shows the device according to Fig. 1 in the position during manual operation in the same section; Fig. 3 shows a variant of the device according to Fig. 1. and 2 in partial axial section, Figs. 4 and 5 show a coupling element for the motor circuit in cross-sections in different positions; Fig. 6 shows another design of the device. &iacgr;&ogr; an axial section, Fig. 7 shows another modified design of the device, also in an axial section and Fig. 8 shows a design in which a special type of output pinion is used for the gear sector, in an axial section. In the embodiment shown in Figures 1 to 5, the device for manual operation comprises a housing 2 of the apparatus. supported hollow shaft 1, one end of which protrudes from the housing and carries a rotationally fixed output gear 3, which engages in a not shown A gear segment of an adjusting device for the disc engages. A drive gear 5 is rotatably mounted on the hollow shaft 1, which is connected to the The electric motor drive meshes with the coupled worm gear 4, thus forming a reduction gear with the worm gear 4. The drive gear 5 rotates freely on a thickened part of the hollow shaft 1. A crankshaft 7 for manual operation, which is provided with an annular groove 7', is rotatably and axially slidably mounted in the hollow shaft 1. A spring 8 is arranged at the hollow end 10 of the crankshaft 7, which on one side rests against a spring plate 9 that is firmly connected to the hollow shaft 1, on the other hand, it is supported against the crankshaft 7, i.e., against its hollow-bored end 10. At the end 10 of the crankshaft 7 is a radially projecting Rim 11 is provided, the sliding travel of which of the crankshaft 7 is limited by its contact with a ring 12 in the cavity of the hollow shaft 1. The thickened part of the hollow shaft 1 is provided with a diametric bore 13 for receiving two balls 14, which are used for disengaging and coupling the The drive gear 5 serves with the hollow shaft 1. The hub of the gear 5 has two diametrically opposed grooves 15. The crankshaft 7 projects on the side of the output gear 3 emerging from the hollow shaft 1. A clamping screw is attached to its polygonal end piece located there. 17. The attached hand crank 16 is mounted. The output gear 3 is provided on its end face with protruding claws 18, which primarily are formed by widening the pinion teeth themselves. The hand crank 16, in turn, has corresponding claws 19 that engage between those the output gear 3 engages. Both claws 18, 19 together form a gear coupling. In the normal operating position, the The crankshaft 7 is held in the position shown in Fig. 1 by the action of the spring 8. The balls 14 rest on the outer surface of the thickened part of the crankshaft 7 and each engage in one of the grooves 15 in the drive gear 5. With the electric motor switched on, the drive gear 5, in this position, engages the hollow shaft 1 via the balls 14. It is thus driven by the drive gear 5 and transmits the rotary motion via the output gear 3 to the toothed segment or the like of the adjusting device. In this position-

Claims

In the drive position, the hand crank 16 remains separated from the output gear 3. In an emergency, axial pressure is exerted on the hand crank 16, whose claws 19 (F i g. 2) engage with the corresponding claws 18. of the output gear 3. In doing so, the crankshaft 7 is displaced against the pressure of the spring 8, and the annular groove 7' reaches the level of the diametrically opposed bores 13 in the hollow shaft 1, so that the balls 14 are now pressed into this annular groove T, emerging from the grooves 15 of the Release the drive gear 5 (Fig. 5). In this way, the drive gear 5 is disengaged from the hollow shaft 1 and can rotate freely, while the The hollow shaft 1 together with the output gear 3 rotates together with the hand crank 16. The hollow shaft 1 can also be used to transmit motion to the glass pane instead of an output gear 3 with a pulley 20 (F i g. 3) It must be equipped with a flexible transmission that transfers the drive to the lever system of a disc winch. The variant shown in Fig. 6 depicts identical parts with the same reference numerals. The hand crank 16a for the manual drive operates with a specially shaped part 22 of the crankshaft 7 &agr; together, which has approximately a square or otherwise non-circular cross-section, which via a section 23 into a thinner extension 23'. The extension 23' rests in an axial bore of the small crankshaft part 7 Σ, which in this case it does not serve directly for carrying the hand crank 16 a as in the previously described design. The square-sectioned part 22 for the hand crank 16a rests when the hand crank 16a is displaced axially against the action of the spring 8 (Fig. 2). in the cavity of the hollow shaft aa and is coupled to it in the direction of rotation by the square end section 24, namely at the outermost end of the hollow shaft aa. Here, the kinematics of the electric motor drive, i.e., the balls 14 a, are detached from the drive gear 5. As long as manual operation is not required, the crank 16° can be removed, since part 22 is connected to section 23 and the The 23' section is firmly connected to the hand crank 16a and only positively connected to the crankshaft section 7&. This prevents the Hand crank 16° protrudes into the interior of the carriage. The variant shown in Fig. 7 provides a detachable axial support for the hand crank 16b on the hollow shaft 1b, so that a A certain resistance is encountered to prevent the hand crank 16 6 from being unintentionally released while still engaged. In the example shown, The spring-loaded support consists of a small ball 25 which is arranged in a radial blind hole of section 23 b of the hand crank 16 b. and is held in place by the pressure of a spring 26 in the bottom of this blind hole. Slipping out of the ball 25 is prevented by the crimping of the circumferential edge. The blind hole is avoided. The ball 25 is constantly pressed against the inner wall of the hollow shaft Ib under the influence of the spring 26, thus securing it. The hand crank 16 b is held in place by friction, preventing it from unintentionally slipping out. Figure 7 shows the hand crank 16b in the position corresponding to manual operation. By moving the hand crank 16b to the left, As a result of the spring 8 (see Fig. 1), which acts axially on the crankshaft 7b, the square-sectioned part 22b detaches from the The correspondingly shaped end section 24b of the hollow shaft 1b is disengaged, so that the hand crank 16b is disengaged. This is achieved by the small ball 25 against the recessed edge (F i g. 8) of the end section 24 b rests in the hollow shaft 1 b, preventing the hand crank 16 from sliding out completely. b. However, it can still be removed if it is shifted to the left in an axial direction with a certain amount of force. The ball 25 is pushed back into its blind hole against the force of the spring 26. Fig. 8 shows that the output gear 3c engaging in the tooth segment 30 of an adjusting device has a tooth profile on each of its two end faces. It has a disc-shaped projection 28, 29 that extends radially beyond the teeth of the output gear 3c. These projections 28, 29 are intended to to prevent lateral displacement of tooth segment 30 beyond a predetermined range, especially if tooth segment 30 is made of The sheet metal is manufactured. One or both disc-like projections 28, 29 can be formed by shaped washers or components. of the output gear 3c itself, if it is press-cast, stamped, or the like. In the example shown, the outermost projection 28 is in Height of the end section 24 c for receiving the hollow shaft lc with an annular groove 32 for concentric support of a ring 33 or two half-rings provided. With the aid of an additional annular groove in the hollow shaft Ic, the output gear 3c is secured against axial displacement. A small The leaf spring 31 between the disc-shaped projection 29 and the housing 2 of the device holds the three parts 28, 29 and 3c firmly against the ring. 33 pressed and also enables the output gear 3 c to be mounted on the hollow shaft 1 c by axial pressure against the resistance of the Leaf spring 31. Patent claims:

1. Device for moving sliding windows, in particular in motor vehicle doors, with a crank drive and an electric motor, switchable drive, which, via a reduction gear, is in operative connection with the movement mechanism acting on the window. a stationary, coaxially arranged output gear, pulley or the like, mounted on the crankshaft, is actuated and is in a switching position according to axial Disengaging the crankshaft against the pressure of a spring, whereby only the crank drive is engaged, characterized in that that the crankshaft (7, 7a, 1b) is rotatably and slidably mounted in a hollow shaft (1, 1a, 1b, 1c) on which the output gear (3, 3a, 3b, 3c) is mounted. Pulley (20) or the like between the hand crank (16, 16a, 16b) and a drive gear (5) of the reduction gear of the electric motor The drive is rotatably mounted such that the drive gear (5), which rotates freely on the hollow shaft (1, a1, b, lc), is guided by radial bores (13) in the Hollow shaft (1, ala, b, c) mounted in grooves (15) balls (14) engaging in the hub of the drive gear (5) are coupled to the hollow shaft (1,1a, Ib, Ic) and after axial displacement the crankshaft (7, 7a, 7b) against the pressure of the spring (8) by the balls (14) falling into a space with the radial bores (13) in the The hollow shaft (1, a1, b, c) is decoupled from the hollow shaft (Cl, a1, b, c) by means of the annular groove (7') on the crankshaft (7\ a1, 7b) in the covered ring groove (7') on the crankshaft (7\ a1, 7b), whereby in this Switching position the hand crank (16, 16a, 16b) directly or indirectly with the output gear (3, 3a, 3b, 3c), the pulley (20) or the like for the The movement mechanism is positively coupled.

2. Device according to claim 1, characterized in that for coupling the hand crank (16) with the output gear (3), the pulley (20) or the like, both parts to be coupled have interlocking claws (18,19) directed towards each other.

3. Device according to claim 1, characterized in that for coupling the hand crank (16 a, 16 b) with the output gear (3 a, 3 b, 3 c) or the like, the hand crank (16 a, 166) a shaft end with a part (22, 22 b) with a non-circular, possibly square cross-section and the Hollow shaft (1a, 1b) have an end section (24,24 &dgr;, 24 e) with a corresponding cross-section.

4. Device according to one of claims 1 to 3, characterized in that the crankshaft (1a, 1b, 1c) consists of two parts, of which the a part with the hand crank (16 a, 16 &gr;) firmly connected and by a part having a non-circular cross-section (22,22 b) and an attached part the subsequent section (23, 23 b) is formed with a thinner projection (23', 23'&dgr;), while the other consists of a short crankshaft part (1a,7b) with an axial bore for the projection (23', 23'6). 40 5. Device according to claim 4, characterized in that the projection (23 b) of the part (22) on the hand crank (16 &gr;) has a radial blind hole with a spring (26) and a ball (25) which is pressed against the inner wall of the hollow shaft (1 b) as a safeguard against unintentional axial displacement of the hand crank (16 b).

6. Device according to claims 1 to 5, characterized in that the output gear (3 c) has two lateral disc-shaped projections (28, 29) which support the tooth segment (30) of the movement mechanism acting on the window.

7. Device according to claim 6, characterized in that the projections (28, 29) are formed in one piece with the output gear (3 c).

8. Device according to claim 6, characterized in that the projections (28, 29) consist of two disc-shaped components.

9. Device according to claim 6, characterized in that the output gear (3c) with the projections (28, 29) is pressed against a concentric support of the hollow shaft (Ic) by a leaf spring (31) between the output gear (3c) and the housing (2), and this support consists of a ring (33) which is partially located in an annular groove (32) on the circumference of the hollow shaft (Ic) and with its section projecting from the hollow shaft (Ic) lies in an annular groove of the output gear (3c) or of the disc-shaped projection (28) connected to the output gear (3c). Printed materials under consideration: German patent specification no. 871 710; German utility model no. 1 803 812; US patents no. 1,916,579, 2,621,543 406. This includes 1 sheet of drawings. 809 598 / 143 8.68 © Bundesdruckerei Berlin