DE1021263B - Device for fitting and removing motor vehicle tires - Google Patents

Description

GERMAN

The invention relates to a device for pulling on and pulling off motor vehicle tires on or from wheel bodies with undivided rim.

There are devices for fitting or removing motor vehicle tires on or from the Wheel bodies with an undivided rim have become known, which consist of a base on which the wheel is placed is, and which carries a central pin extending transversely to the plane of the tire around the one radially directed arm is pivotable. A molded body is attached to the arm, its front edge engages between the rim of the wheel and the tire bead, and led around in a circle is, whereby the connection between the tire and the rim is released or established. The molded body is guided on the outer rim edge through a transversely directed surface.

With devices of this type there is a risk that the tire bead lifted off the molding not performed properly and the inner rim surface is touched by the molding, so that the especially with tubeless tires there are sensitive ones that lie against each other Sealing surfaces are damaged.

This disadvantage is prevented according to the invention in that one after the rear end extending, substantially parallel or slightly inclined to the plane of the tire of the fitting is provided with rounded transitions. on which the tire bead runs.

The invention is explained in more detail with reference to the drawing, the two exemplary embodiments of the subject matter of the invention in different views, namely shows

Fig. 1 is an overall view of an embodiment of the device according to the invention;

Fig. 2 shows the shaped piece according to Fig. 1 in another view;

Fig. 3 shows only the plate with a wheel placed on it and a tire to be fitted;

Fig. 4 shows the completed setup during of winding and

Fig. S is a similar view, but in a slightly different position of the device;

Fig. 6 shows an oblique view of the pivot lever with another embodiment of the molded piece (the shell) from the outside and

Fig. 7 from the inside facing the axis of rotation;

Fig. 8 shows an additional lever to be used that is only required for dismantling.

According to Fig. 1 to 5, 1 denotes a base plate, which by means of stone screws or other device for pulling on and off
of automobile tires

Applicant:

Theodor Mengel,

Duisdorf near Bonn, Hinter-Aue 7

Theodor Mengel, Duisdorf near Bonn,
has been named as the inventor

Way can be screwed through the mounting holes 2 on a base. 3 is a base tube which is held on the base plate 1 by means of stiffeners 4 and has an inner telescopic tube 9 which can be locked in height by means of a wing screw 7 or the like. To prevent rotation, the inner telescopic tube 9 is equipped with a nose or ledge 6 which engages in a slot 5 of the outer telescopic tube 3. The plate 8 is fastened to the inner telescopic tube 9 and preferably has inclined slots 10 to which the wheel can be fastened by means of wing screws 11. However, the arrangement may also be such that the plate 8 is not adjustable in height directly connected to the outer telescopic pipe 3 and that the inner telescopic tube 9 only serves to change the position of the molded piece to the tire or wheel in accordance with the thickness thereof. In this respect, the device described is not the subject of the invention. On a rotatable sleeve 12, which is detachably connected to the lower part of the device by means of a nut 13, a telescopic tube 14, 15 is attached, which is adjustable in length and held in a lockable manner by a wing screw 18 or the like. At its outer end, the pivot lever 14, 15 has a socket 16 into which a hand lever 17 can be inserted so that it stands slightly upwards and thereby allows pressure to be exerted on the molded piece from above. This shaped piece 19 is also attached to the end of the pivot lever 14, 15 and has an essentially vertical front edge 20 which is bent slightly inward and can engage between the rim and tire bead. The lower edge 21 of the form

709 810/41

Claims (6)

In the exemplary embodiment according to FIGS. 1 to 5, it is slightly rounded inward over the entire length. In addition, a guide strip 22 is welded onto the inside, which rests on the rim edge and thus limits the depth of penetration of the molding. The outer surface of the molded piece is rounded and, as can be seen more clearly from Fig. 2, bent over to a rearwardly tapering, approximately horizontally extending widening 23, which starts at about 25 and ends at 24 in a slightly upwardly curved edge, so that at the underside results in a rounding that is gentle on the tire bead or the side wall of the tire. Fig. 3 shows the device with a wheel fitted and a tire not yet fitted, but without the upper part of the device. The tire is denoted by 30 and its bead is denoted by 31. 32 is the wheel on which the tire is to be mounted, the fastening holes 33 of which are fastened in the slots 10 of the plate 8 by means of the wing screws 11. The actual rim is denoted by 34 and the rim edge is denoted by 35. As can be clearly seen from Fig. 4, the upper part of the device with the pivot lever and the shaped piece is then put on, with the edge 20 engaging between the rim edge and the tire bead and lying at the front in the direction of rotation. The reference symbols have the same meaning as in the previous figures. From Fig. 5 it can be seen how the rear widening 23 with its edge 24 presses the sidewall of the tire downwards and thus ensures that the tire is securely held in the rim during the rotation. By pivoting the lever by means of the handle 17 by 360 °, the tire can be pulled on properly in seconds without the risk of damaging the tube, the tire bead or the rim edge. A somewhat modified embodiment can be seen in FIGS. 6 and 7. Here, the lower part is the same as in the previous embodiment. The swivel sleeve 42 can be placed on the axis of the device in place of the swivel sleeve 12 and secured by a nut. The pivot lever is designated here by 44 and 49 and can also be pulled out telescopically. The neck sleeve 46 for the hand lever is attached to the outer telescopic tube 44 by a special sleeve 45. The opening of the socket into which the hand lever can be inserted is denoted by 47. 48 is a clamping screw, by means of which the position or the length of the telescopic tube can be determined. The shell-like molding is here generally designated 50 and has a nose or edge 53 which is slightly bent inwards at its front end. Likewise, the shaped piece is slightly bent inwards at the top at 52. Approximately at the level of the attachment to the pivot lever, the shaped piece can have an elevation 51 at the top, which is also provided with an inwardly bent edge and has the purpose. to prevent the tire bead from skipping over the molding when pulling it off, which could damage the bead. A guide bar 54 is welded to the inside, which has the same meaning as the guide bar 22 according to Figs . on the bottom. The edge 55 is rounded and the transition from the part 53 to the rear end is designed gradually. Towards the inside, the widening 56 can be supplemented by a welded plate 57, so that this widening extends not only outward but also partially inward, whereby it is expedient, as can be seen from Fig. 7, this widening 57 to the rear to gradually let go again. In Fig. 8, a simple, additionally used lever 70 is shown, which is provided with a nose or edge 71 and has a slight curvature 72 at the end. This lever is pressed in at a point between the rim edge and the tire bead when removing a fitted tire. The fitting is placed on top and rotated in the same direction as during assembly. Here, the tire bead runs onto the upper side of the widening 56 and is thus lifted out of the rim. Conversely, during assembly, the underside 57 of the widening presses the bead into the rim. It is therefore possible to assemble and disassemble tires without changing the device according to the invention by simply using the rear widening of the molding in two ways, once as a lifting device for the tire bead when dismantling and secondly as a pressing device when assembling the tire. Ρ.Λ T E N T ANSI 'R Γ CUE: 1. Device for pulling on or pulling off motor vehicle tires on or from wheel bodies with undivided rim using a pivotable, radially adjustable lever, its The pivot axis is perpendicular to the tire plane and the one between the tire bead and the Rim engaging molding carries, the front edge of which is approximately perpendicular to the tire plane runs, characterized by one extending to the rear end, substantially Widening (23 or 56J of the molding) running parallel or slightly inclined to the tire plane (20 or 50) with rounded transitions. 2. Device according to claim 1, characterized in that the shaped piece (19 or 50) also on its inside facing the axis of rotation with an essentially horizontally extending one Guide bar (22 or 54) is equipped, which slides on the rim edge and the depth of penetration the front edge (20 or 53) of the shaped piece (19 or 50) is limited. 3. Device according to claims 1 and 2, characterized by one on the fitting (20 or 50) located, approximately perpendicular to the tire plane extending elevation (51) with preferably after inside bent upper edge that skips the tire (30) over the molding prevented. 4. Apparatus according to claim 1, characterized by a lying within the wheel opening, on the pivotable lever (14) provided, known per se, for insertion the fitting (20 or 50) or a lever extension that is at an angle to The pivot lever is directed obliquely upwards. 5. Device according to claims 1 to 4, characterized in that the pivotable in a circle Lever (14) is designed telescopically extendable in a known manner in order to differentiate the device To be able to adapt rim or tire sizes. 6. Device for dismantling tires according to claims 1 to 5, characterized by an additional loose lever (70) with a sharpened hook-like attachment to be used, which is used between the rim and the tire bead and is the point of attack for the setting of the molding (19 or 50) results when pulling off the tire. Considered publications: German Patent No. 830 303; Belgian Patent No. 502 714; Swiss Patent No. 258 165; British Patent Nos. 646 059, 14 261 from 1907; U.S. Patent Nos. 1,587,634, 1,480,371, 556 024, 2 655 985, 2 652 078. 1 sheet of drawings © 7G9 810/41 12.