CS196237B2 - Drop windows activator in the first place the motor vehicles - Google Patents

Abstract

1322508 Sliding window lifting device H L GOLDE GmbH 22 June 1970 [20 June 1969] 30160/70 Heading E2M [Also in Division F2] A window lifting device for, e.g. a vehicle, comprises a tube 10 passing through a housing 1, 2, a pinion 5 rotatably mounted in the housing and drivably engaging through a cutout portion of the tube a rack-like threaded cable 9 in the tube, the tube being axially located in the housing by sleeve abutments 11 and 12 on the tube on either side of the housing; the tube 10 and sleeves 11, 12 being of a synthetic plastics material. A lug 8, attached to an end of the cable, is slidable in a slotted metallic tube 6 and engages a support plate 17 which operates a window 14, the tube 6 being joined to the tube 10 by a synthetic plastics material sleeve 13; the sleeve having flanges 28, 29 to attach it to a support plate 19 of the tube 6 and a rib like projection engaging a slot in the plate 19. The tube 10 may have axial fluting and transverse slots (20 and 21) Figs. 6 and 7 (not shown) to prevent the sleeves twisting. The sleeves 11, 12 may be injection or extrusion mouldings of copolymerised polyacetal and may have projections engaging recesses in the housing to prevent them twisting. An additional plastics tube 52, e.g. of PVC, may be provided and the guide bar 19 may be dispensed with if the lugs 28, 29 are secured to a mounting plate 19' (Fig. 2 not shown) to which the metal tube 6 is rigidly attached. The window lifting device may include a spiral spring weight compensator as in Specification 1322507.

Description

The invention relates to a pull-down window trigger, in particular for pull-down windows which can be lowered into motor vehicle windows, with a flexible threaded cable, movable by tension and pressure in the guide tube, which engages in the drive housing with the drive pinion. by means of a gripper fastened by one or more threaded cables to the lower edge of the window and engaging a longitudinal slot provided in the guide tube. '

In this already widespread type of window trigger, it is known to produce a guide tube only about the region of the carrier travel as a metal tube provided with a slot and to make the remaining part as a flexible plastic hose (French Patent 1,470,922). Although this design allows for a convenient adjustment of the cable path in the available mounting space and avoids the difficult bending of the slotted metal tube, it has not been able to assert itself in practice since the flexible plastic hoses could not withstand the forces generated, especially in large curves, without the risk of buckling. In this way, not only significant malfunctions have occurred, but there is also the danger that the closed window can be opened by pushing the plate downwards downwards, thereby opening the door closure elements externally accessible so that unauthorized people can open the previously closed vehicle door. In addition, the flexible plastic hoses can be connected to the drive housing and the metal tube provided with the slot only by means of expensive clamping connections or screw connections. The connection to the drive housing is carried out by means of hose ends suspended on both sides of the drive pinion between the housing halves so that the cable passes through the drive housing. This not only results in an increase ^{in the} friction of the cable caused by the teeth being pressed against the housing wall opposite the pinion, but also allows axial offset of the two ends of the hoses, further increasing the friction.

The use of plastics for large guide tube lengths is desirable in itself, since in this way the friction of the threaded cable in its guide tube can be reduced, increasing the torque control on the pinion, especially if the cable and guide tube have to be mounted in the mounting space. relatively small radius of curvature. As is known, the dynamic coefficient of friction of steel with steel is considerably higher than that of most steel

The plastics used. The invention is therefore of the essence. 'tasks' - replace at the window launcher ,. of the type described above, the metal guide tube is as plastic as possible and, in so doing, eliminates the shortcomings of the known embodiments. Total -. it is expressed by the invention that the torque required for cable window lifters is reduced.

According to the invention, a relatively rigid or heat-bent pipe is provided outside the travel path of the carrier. made of plastic. which is guided by a drive housing in a manner known for metal tubes, provided there with a recess for the drive pinion to penetrate and for connection to the drive housing and the metal tube, sprayed with plastic sleeves which are rigidly connected by sprayed molded parts to the drive housing or a metal tube. Starter. The windows according to the invention can be produced economically in both single-flow and dual-flow installations and are characterized in particular by simple but very reliable connection points between the plastic tube, the drive housing and the metal tube provided with slots. In the area of the plastic pipe, it is elastic enough to - - may - 'compensate for ...' manufacturing tolerances' at the assembly sites, without causing tensile or compressive stresses in this area - . when opening or closing the window, the pipe axis is deformed illegally. The design of the plastic pipe as a single piece prevents the guide tube from bending at the pinion engagement. - in - - this - area that affects the function and ensures that - the cable has on. side opposite the drive pinion, despite the high pressure of the teeth. .small - friction. Starter. windows - according to the invention -. requires against. cable starter - windows - with metal guide - only about - o. 20. % lower. drive torque. For example, in a single-stream version of a window trigger, the torque of 20 cmkg of the metal tube trigger according to the invention is reduced to about 16.5 cmkg.

. Of great importance is the selection of a suitable plastic for the production of the guide tube and the sleeve sprayed thereon. Depending on the requirement of the automotive industry, the window triggers must be able to function and be functionally reliable without limitation in the temperature range of -40 to - 4 * 70 ° C. From this temperature range, including - range - no - less than 110 ° C, it is apparent that. Here, plastics suitable for their mechanical properties are not sufficient. room temperature.

Both temperature limits cause difficulties, whereas, in the direction of deeper temperatures, the - most commonly used plastics - severely - - impact strength - and - notch toughness is reduced, making the plastic - more brittle and thus unsuitable for dynamic loads,. decreasing strongly. again in the most commonly used. plastic with increasing temperature tensile strength and resistance - to abrasion. J ·. . - 7 - 7 - 7; · ..

Plastics, in which:. se. practically, there is no decrease in value over the large temperature range. It is characterized by long-term favorable properties, high resistance to heat and oxidation - aging, low wetting properties, easy workability. by spraying and resistance to mineral lubricants for the stated temperature range, is approaching - already in appearance. to their “properties”. so much steel that it does. - previous failures. they become understandable when using plastic cables for threaded cables. It has now been surprisingly found. that for the manufacture of plastic tubes; and. The plastic-plastic sleeves are perfect for copolymerized polyacetals. Good results have been achieved with Hostaform plastic. C. Farbwerke Hoechst AG, with an acetarul copolymer made essentially of trioxane. The window lifters made with this plastic were still fully capable - with 80,000 double-strokes (reciprocating motion). function.

When the plastic pipe is injection molded according to the invention, no chemical bonding occurs at the boundary surfaces between the sleeve and the plastic pipe. However, in order to achieve the necessary firm hold of the sleeves,. according to the invention, a measure is provided in which the plastic pipe is provided, at least in the area of the sleeves to be sprayed, with recesses and / or elevations which secure the sleeves against rotation - and displacement on the plastic pipe. mass. In connection with the slight shrinkage of the sleeves on cooling, this is obtained. very resistant to mechanical loads - between the sleeve - and the plastic pipe. material. The spraying of a plastic pipe with the same or chemically similar plastic must be regarded as completely unconventional.

The anti - rotation lock is preferably provided in grooves, grooves,. flattening or the like, parallel to the axis, arranged in the production of the pipe along the length of the plastic pipe. Such depressions parallel to the axis can be easily produced in the manufacture of the tube by spraying with a tool provided with corresponding protrusions. . Fuse - against. The displacement can be formed by scratches, grooves, flattenings or the like, arranged substantially transversely to the axis of the tube in the tube. plastic materials.

According to the invention, the drive housing is - fixed to the - passing pipe of. In such a way that a sleeve is pressed onto the two holes of the pipe profile in each case by means of a tubular profile for clamping the guide tube. . made of plastic, essentially in the form of a hollow cylinder, which occupies a minimum of 19 · 6 2 · 37

With the aid of one extension arranged in the axial direction with corresponding recess of the housing. In this way, the housing on the plastic tube is secured against both axial displacement and rotation.

Pipe connection from. plastic - for a metal tube provided with slots, which is provided with a window trigger in its own working area. preferably such that the plastic sleeve for connecting the plastic pipe to the metal pipe provided with a slot protrudes above the end of the plastic pipe for clamping the end of the metal pipe and is provided with a plurality, preferably two sprayed couplings arranged approximately parallel to the axis of the pipe, on. which is fixed. for example, a riveted sheet metal piece firmly connected to a metal tube. Although it secures this connection against displacement and rotation, it may be appropriate if it is additionally on. sleeve made of plastic - molded - ribbed. a protrusion, transverse to the axis of the tube, which engages with a corresponding slot of the sheet metal piece.

. This divides the function between the sprayed coupling on one side and the rib-like projection on the other side, while the couplings assume substantially anti-rotation protection and secures the holding of the plastic pipe on the metal pipe provided with the slot; projection axial bearing of interconnected parts.

The so-called spring magazine known from use in conjunction with a cable-operated window lifter, the spring of which, when the window pane is lowered and facilitates by its spring force to raise the window plate during the closing stroke, encounters difficulty so far, - if the plastic pipe does not allow - since it is not provided with a spring engagement - with a threaded cable. Since, on the other hand, due to the use of a plastic pipe guide, the required torque is already considerably reduced and only a relatively small spring magazine is required to achieve a noticeable - reduction - torque, in another embodiment of the invention It is proposed to provide a spring-loaded magazine on the drive housing, the coil spring of which is arranged in a spring wheel which is arranged by a toothing. on its outer perimeter it engages with the drive pinion, and when the window is opened the spring is tensioned. In this way, a very compact arrangement of the spring magazine is achieved, which together with the drive housing forms a structural unit. By means of this spring container, the torque of 16.5 cmkg mentioned in the example above is further reduced to about 10.1 cmkg.

In a preferred embodiment of the spring magazine, the spring wheel is rotatably mounted on a hub mounted non-rotatably on the drive housing, which is partially wrapped by the inner coil of the coil spring and provided with a recess for suspending the inner end of the spring; spring wheel wall, - -flanking the spring. The spring-wheel and optionally spring-loaded lid-closing lid may be formed of a plastic, for example of a plastic used for a pipe-of a plastic.

For the function of the window-trigger according to the invention, it is not necessary for the purpose of the invention to produce the pipe conduit connected for clamping the cable to the drive housing from a rigid plastic. As a result, in a preferred embodiment of the invention, the plastic pipe - immediately ends - behind the drive housing on its side facing away from the metal pipe. - provided with a slot and at the end of the plastic pipe - a flexible plastic hose is inserted to clamp the free end of the cable up to the adjacent plastic sleeve. The flexible hose - made of plastic, for example - made of plastic - based on polyvinyl chloride, - allows virtually any external installation space.

Further details of the window trigger according to the invention will be explained in more detail below with the aid of the following examples, shown in the drawings. FIG. 1 shows a side view of a single-current window-trigger according to the invention, FIG. 2 in a broken side view of FIG.

I, deviating from the connection situation between the plastic pipe and the metal pipe provided with the slot, FIG. 3 in a natural size partially broken - a view of the spring-loaded drive housing, FIG. 4 - a section along the line 1V - 1V in FIG. 3, FIG. 5 is a sectional view along the line V-V in FIG. 3, but on a larger scale, FIG. 6 in FIG. 5 is a partially broken side view of the sleeve for fastening to the drive housing arranged on a plastic tube; Fig. 7 is a partially broken plan view of the arrangement according to Fig. 6, Fig. 8 - broken view - rear view of the connection situation between the plastic pipe and the metal tube provided with the slit and Fig. 9 a section through the sleeve shown in Fig. 8 1X — 1X, in Figure 8.

Window Trigger - consists of two sheet metal parts 1 and 2 with spring magazine 3 and drive crank 4 ,. from drive pinion S, metal tube 6 with slot 7 for carrier penetration 8, threaded cable 9, rigid plastic tube 10, sleeves

II, 12 and 13 of plastic - spraying the plastic tube 10 and the broken window pane 14 shown in dashed lines with the lifting rail 15 and the lever axis 16 fixed thereon.

The carrier 8, mounted on the cable 9, is rigidly connected to the support plate 17, which is controlled by two sliding elements 18 mounted thereon to guide the window pane 14 in parallel. The slotted tube 6 is fixed to the guide rail 19. Support plate 7

196-237 forms a window pane connection 14. via the lever axis 16 with the lifting rail 15. The parallel guide, consisting of parts 17, 18 and 19, does not form a necessary part of the present invention and therefore does not need any further explanation. It basically serves, in the case of inadequate guidance of the sides of the window pane, 14 to prevent cross-over of the panes about an almost horizontal, perpendicular to the plane of the panes. The support plate 17 has two on it. fixed sliding elements which, together with the central sheet metal guide rail 19, are used for parallel guidance of the window pane 14.

The sliding elements 18 each have a slot by means of which the bent sheet metal guide rail 19 is guided on the arm assigned to it. The parallel guides formed by the parts 17, 18 and 19 serve essentially to prevent the skewing around approximately horizontal when the side window 14 is insufficiently guided. perpendicular to the table surface passing through the axis.

The rigid plastic tube 10 is formed by a profile of a Host-form extruder. C (R type 2520 and has been bent to the desired shape in an oil bath at 154 ° C; dimensions · its diameters · is: inner 8 mm, outer 10 mm. · Sockets 11, 12 and 13 made of plastic material, 6 to 9, they are made of the same material and are inserted into a spraying device arranged to match the shape of the sleeves to spray the ends of the rigid plastic tubes 10.

The necessary centering of the ends of the plastic pipe prior to spraying in the spraying device can be carried out, for example, by means of helical springs (not shown) slid onto the pipe ends, which remain in the sleeves after spraying. As shown in the example of the sleeve 11 of FIG. 7, the rotation of the plastic sleeve on the plastic pipe 10 can be effected by means of grooves 20 distributed over the length of the pipe.

These grooves 20, which are shown in exaggerated size in FIG. 7, can be formed as continuous fine grooves when the plastic tube is extruded. Accordingly, in the region of the sleeves, a similar, contiguous contact is formed together with the sleeve material entering the grooves. plastic pipes with sleeves that secure the sleeves against rotation. However, in order to achieve sufficient securing against axial displacement, the plastic tube may be provided in the region of the sleeves with one or more recesses extending transversely to the axis of the tube, for example as shown in Fig. 6 by means of indentations 21.

During the injection molding, the material of the sleeves penetrates into these notches 21 and thus forms a contiguous connection of the sleeves to the plastic pipe. The sleeve 13 shown in FIGS. 8 and 9 is correspondingly connected to the other end of the plastic tube. '

As can be seen from Figures 1 and 3 to 5, the rigid plastic tube 10 is guided through the drive housing, to which both housing halves 1 and 2 are provided in a known manner by a shaped tube profile which is generally shown in the drawings. The sleeves 11, 12 are adjacent to this tubular profile 22 on both sides so that the drive housing cannot be displaced axially on the plastic tube 10. In order to avoid the rotation of the drive housing on the plastic pipe 10, in the example shown, both housing halves 1, 2 are provided at the ends of the pipe section 22 with one recess 23 into which the extensions 24 are inserted. 12.

Giant. 3 shows a recess 25 arranged in a plastic tube through which the drive pinion 5 engages the threaded cable 9. The drive pinion 5 is connected in a manner known per se to the drive shaft 26, housed in the housing halves 1, 2. The head 26 * of the drive shaft 26 provided with the notched toothing serves to engage the drive cranks 4 shown in FIG. 1. The drive pinion 5 is connected in a known manner, as mentioned above, to the drive shaft 26 so that rotation of the drive shaft 26 9 in its longitudinal direction. In the housing part 1, a sliding cover 27 is arranged coaxially to the drive shaft 26, in which a helical trailing brake is arranged which cooperates in a known manner with the drive shaft 26 so that when the drive shaft is rotated the drive crank 4 is lifted. a trailing spring from the inner wall of the sliding cover 27 so that the drive device can be actuated easily. When the rotation of the drive shaft 26 is complete, the threads of the trailing spring abut the abutment wall of the transfer housing 27, thereby engaging the helical drag brake. The trailing brake avoids the possibility that forces acting on the window pane 24 can cause longitudinal displacement of the cable and thus return to the drive shaft 26.

The connection of the plastic sleeve 13 to the slotted tube 6 is shown in FIGS. 1, 2 and 8, 9. As can be seen from FIGS. 1 and 2, the sleeve 13 slightly overlaps the plastic sleeve 10 so that the tube 6, provided with a slot, it can be inserted with its adjacent end into the sleeve 13. In spray-forming the sleeve 13, the feet 28 and 29 are formed at the same time. These feet 28 and 29 are, for example, firmly connected, for example by riveting, in FIGS. In addition, a screw-like projection 33 (FIGS. 8 and 9) is sprayed onto the sleeve 13, which engages with a slot-like recess 34 in the sheet-metal rail. The window plate actuator 14 can be used without a parallel guide rail 19, then it is possible to form a corresponding 196237 connection to the metal tube 6 provided with the slot. 19, arranged as shown in FIG. 2.

3 and 4, the surface dimension of the drive housing half 1, on the side on which the pinion 5 is supported, is enlarged to accommodate the spring container 3. To this end, it is halved 1, correspondingly. the pin 36 of the head 37, provided with a flattening 35 against rotation, is riveted to the recess half. A bearing extension 38 on which the spring wheel 39 is rotatably mounted is arranged concentrically to the head 37 between this and the rivet pin 36. The spring wheel 39 engages with the teeth of the drive pinion 5 on its outer periphery. The bearing of the coil spring 41, the spring wheel 39 is provided with a cylindrical wall concentric to the head 37, which is approximately equal to the axial length of the head 37.

The inner end of the spring 43 is hinged to the recess 44 of the head 37, while the outer end of the spring 45 is hinged to the slot 46 in the cylindrical wall 42. The spring container is closed by a plastic lid 47, not shown for clarity. 3 plotted. The lid 47 is fastened to the housing half 1, for example by hollow rivets in the holes 48 of the housing half 1.

In FIG. 3, arrow 49 indicates the direction of travel of the cable 9 when opening, while arrow 50 indicates the displacement of the threaded cable 9 when closed. Obviously, when opening, in which the drive pinion · 5 · rotates counterclockwise, · the spring wheel is driven in the direction of the arrow · 51, thereby tensioning the coil spring 41. When closing the window · 41 the spring imparts the accumulated force over its the toothing 40 of the drive pinion 5, thereby reducing the driving torque. Spring steel coil spring about 10 mm wide and about 1 mm thick with about 10 windings in addition to a very significant reduction in driving torque.

A flexible plastic hose 52, which covers the free end of the drive threaded cable uta, is pushed onto the end of the plastic pipe 10 extending over the sleeve 11.

The bores 53, apparent from FIGS. 1, 2 and 3, serve to secure the window actuator at the mounting location, e.g.

Claims (12)

1. Pull-down windows, especially motor vehicles, where the pull-down windows can be lowered into the windows of these motor vehicles with a flexible threaded cable, sliding thrust or pressure in the guide tube which engages in the drive pinion housing and is connected immediately or via a carrier secured by at least one threaded cable at the lower edge of the window and engaging a longitudinal slot provided in the guide tube, which is formed only in the region of the carrier travel as a metal tube, the other part of which consists of plastic; The carrier path is provided with a relatively rigid or hot-bent plastic pipe (10) which is guided to the drive housing halves (1 and 2), in a manner known for metal pipes, provided with a recess (25) therein. penetration of the drive pinion (5) and for the connection to the two drive housing halves (1, 2) and the metal tube (6) is sprayed with plastic sleeves (11 to 13) which are firmly connected by the molded parts (24, 28, 29, 33) to the drive housing and the metal tube (6). 2. A window-trigger according to claim 1, characterized in that the plastic tube (10) and the sleeve (11-13) consist of copolymerized polyacetal. A window-trigger according to claims 1 and 2, characterized in that the plastic tube (10) is at least in the region of the sprayed-on surfaces. BACKGROUND OF THE INVENTION provided with depressions and / or elevations (20 and 21) to secure the sleeves (11-13) against rotation and displacement on the plastic tube (10). 4. A window lowering device according to claim 3, characterized in that the displacement protection consists of grooves, grooves or flats arranged along the length of the plastic pipe parallel to its longitudinal axis. 5. The window trigger according to claim 3, characterized in that the displacement protection consists of grooves, grooves or flats (21) arranged in the plastic tube (10) transversely to the axis of the tube. 6. The window-trigger according to claim 1, wherein a sleeve is provided with a two-piece tube profile for clamping the guide tube on both openings of the tube profile. (11 or 12), in the form of a hollow cylinder which engages at least one extension (24) arranged in the axial direction in the corresponding recess (23) of the housing. 7. The window trigger according to claim 1, wherein the sleeve (13) arranged to connect the plastic tube (10) to the metal tube (6) provided with a slot protrudes to grip the end of the metal tube (6) over the end. the plastic pipe (10) and is provided with at least two sprayed feet (28 and 29) arranged parallel to the axis of the metal pipe (6) on which a sheet metal piece (19, 30, 19 'is fixedly connected to a metal tube (6). . 8. The window trigger according to claim 7, characterized in that a rib-like projection (33) is formed on the plastic sleeve (13), transversely to the tube axis, which engages the corresponding slot (34) of the sheet metal piece (19). 30, 19 '). Window-trigger according to one or more of Claims 1 to 8, characterized in that a spring magazine (3) is arranged on the drive housing half (1), the coil spring (41) of which is arranged in a spring wheel (39) which is a gear (40) disposed on its outer periphery in engagement with the drive pinion (5). A window lifter according to claim 9, characterized in that the spring wheel (39) is rotatably mounted on a head (37) mounted non-rotatably on a drive housing half (1) which is partially wrapped by the inner coil of the coil spring (41); provided with a recess (44) for suspending the inner spring end (43), while the outer spring end (45) is mounted on a cylindrical wall (42) surrounding the spring (41). 11. A window lowering device according to claim 9, characterized in that the cover (47) closing the spring wheel (39) or the spring magazine (3) is made of plastic. 12. A window lifter as claimed in claim 1, wherein the plastic pipe terminates just beyond the drive housing halves on the side facing away from the slotted coke tube. a flexible hose (52) is inserted into the end of the plastic tube (10) to cover the free end of the cable up to the adjacent plastic sleeve (11).