Drive mechanism for a retractable window, especially in vehicles

Description

[0001] Drive mechanism for a retractable window, in particular of vehicles. The invention relates to a drive mechanism for a Retractable window, especially in vehicles, which is moved up and down by means of a hand crank and an intermediate gear, and The aim is to engage a braking device between the hand crank and the intermediate gear, which prevents the window from moving on its own. the influence of vibrations, etc., prevented this. Previously, the crank or (as an intermediate gear with a brake disc) was used for this purpose. coupled, whereby the coupling could be disengaged when the hand crank was set in motion. According to the new invention, between Hand crank and intermediate gear a clamping lock4 engaged in such a way that it remains ineffective when the hand crank is engaged, but its The locking effect occurs as soon as the rotary motion does not originate from the hand crank, but in the opposite direction from the intermediate gear. for example, under the weight of the window. By arranging a clamping lock according to the invention, each special device Uncoupling the brake device is unnecessary. For this purpose, the invention discloses a particularly simple clamping lock, which essentially consists of a spiral spring wound around the stationary support of the hand crank, the ends of which point away from its base in the direction of loosening. stationary support with the hand crank and in the direction of the tightening on the stationary support with the hand crank driven The intermediate gearbox is positively coupled. To save space, the two positively coupled coupling elements can be allowed to interlock. when nian designs their movement game so differently that (as a follower) of the intermediate gear by acting on one or the other end of the spring, which can tighten the latter on its stationary support before the tightened spring end comes into contact with the drive link of the crank. It has been found that even tightening the A change of one millimeter at the spring end is sufficient to create an effective clamping effect.

[0002] An embodiment is shown in the drawing in Figs. i and 2 in an elevation and plan view of a complete motion transmission. explained.

[0003] Fig. 3 is a section along line 3-3 of Fig. i and Fig. q, a section along line ¢-q of Fig. 3.

[0004] The sliding window A, guided in the frame B, is supported by the lever d, which is guided by a roller C in the guide rail D. This lever d rolls with a drive a on the stationary toothed gear ring g when the gear drive o is engaged by means of the crank b. A rotary motion is imparted, which is propagated via the intermediate gear c to the pinion a. The lever d is located on the rear end p1 of the The crank pin p is rotatably mounted. The crank is fixedly connected to the bell-shaped crank sleeve st (see Fig. 3 and q). A pin o is attached to the drive. A driver is arranged which engages in a radial recess of the crank sleeve n and against which one end h is directed from one side and from the On the other side, the other end 12 of a spiral spring l wound around the stationary pin p rests against it. The radially continuous cutout j - in the The crank sleeve is dimensioned so that between the spring ends h and 12 and the transformations of the cutout that come into contact with them, there is sufficient clearance. The crank sleeve has a slightly larger clearance than the spring ends h and 12 and the drive bolt in the drive o.

[0005] 'If the crank b is turned in any direction, -then the corresponding wall of the radial cutout r of the crank sleeve n the relevant end h and l2 of the clamping spring l with and- thereby loosens the clamping spring from the pin p, i.e., when the crank is turned in No clamping of the clamping spring occurs in any direction.

[0006] If, on the other hand, the window A shows an inclination to pivot the support lever d due to its weight, the drive pin engages in the drive o takes effect and takes the end h of the clamping spring L with it, the latter being wound tightly around the stationary pin p. Even with a With a synchronous movement of approximately one millimeter, the friction between the clamping spring na and the stationary pin p is so great that the disc A is held in place. If one were to attempt to pull up disc A by hand, the same clamping would occur in the opposite direction. The effect of the driver bolt m on the spring end 12 becomes apparent.

Claims

[0007] PATENT CLAIMS: i. Movement mechanism for a retractable window, in particular of vehicles, which is operated by means of a hand crank and is moved up and down by an intermediate gear, characterized in that a clamping lock is located between the hand crank and the intermediate gear. is switched on, which remains ineffective when the hand crank is turned, and exerts its clamping effect when the rotational movement, for example, under the weight of the window, from which the intermediate gear unit necessarily connected to it originates. e.g., the motion gear according to claim i. characterized in that the clamping mechanism consists of a spiral spring wound around the stationary support (p) of the drive and steepening device (l) consists of the ends (h, 12) of which are connected in the direction of unscrewing from their stationary support by the hand crank (d) or the crank sleeve (n) and in the Direction of tightening on the stationary support with the intermediate drive (o) driven by the hand crank by means of a drive bolt (na) is frictionally coupled. . Motion transmission according to claim 1 uni 2, characterized in that the two frictionally coupled coupling elements - Drive pin (m), crank sleeve (n) - and spring ends (1l, 12) interlock, but their play differs so much that the The drive element (m) of the drive (o) tightens the spring (L) on its stationary support (p) by acting on one or the other end of the spring (L). can, before the tightened spring end comes into contact with the actuator wall of the radial cutout (r) of the crank sleeve (0 in ßeriihrttng).