DE8322526U1 - TANDEM - Google Patents

Description

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- 1 description

The present invention relates to a tandem in the form of a bicycle or motorcycle tandem «

Known tandem bicycles are those that have two handlebars , one of which is rigid, two saddle and two spring arrangements with a bottom bracket on a single chain on their frame, which is lengthened compared to single-use bicycles.

Disadvantages of these tandem bicycles are the dimensions, especially the length «which is close to» ' makes it too impossible to transport such a tandem on or even in a passenger car. Another disadvantage is that these tandem two-wheelers are only used as such can be used and, moreover, are relatively expensive.

The object of the present invention is to create a tandem of the type mentioned at the beginning, which is more variable in terms of its possible uses, which in particular is also transportable

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- 2 and less expensive.

To solve this problem are in a tandem of the type mentioned, the features specified in the characterizing part of S claim 1 are provided «

Due to the features according to the invention, the tandem is indeed formed by a single-track, three-axle team, but it has the significant advantage that it can be assembled from two individual two-wheelers or bicycles that can be used individually Retrofitting existing two-wheelers as well as equipping new two-wheelers in production accordingly. In addition, after disassembling into two individual bicycles, this type of tandem can be transported in exactly the same simple manner on or in a car. The conversion of two two-wheelers to a tandem or vice versa can be done in a very simple and quick manner, so that this type of tandem can be used very variably. Besides, it is also at

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Folding bikes applicable / where there is the special

The additional advantage is that with identical -, -:

Folding bikes by omitting the Ϊ *

Middle part without difficulty and in faster

“Way assembled into a single bike

can be.

The connection of the front frame part of the trailing two-wheeler with the rear frame part of the leading two-wheeler can, for example, take place in such a way that the rear frame part of the leading Two-wheeled vehicle with a pin element or the like. is provided / on which the head tube of the front frame part of the trailing two-wheeler can be attached rotatably. According to However, a preferred embodiment of the present invention is for lateral deflection the trailing two-wheeler with the moving part of its steering head joint in the form of the front fork attachable to the rear frame part of the leading two-wheeler. This means that from trailing two-wheelers only need to remove the front wheel and its mudguard.

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The attachment of the front fork of the trailing Two-wheeler on the rear frame part of the leading two-wheeler takes place via the anyway existing clevis mounting ends. 5

According to a further embodiment of the present invention is the front fork the trailing two-wheeler with a pair of coupling elements rigidly connectable, their the other end rotatable with the leading two-wheeler in the area of its rear wheel hub is connectable. This rotatable connection brings the height mobility to be driven over of knolls and the like. With it. The coupling elements are either linked directly to the rear hub axle of the leading two-wheeler or at least in an area close to this Hub axle, preferably below it on the braking torque lever, so that you can with one as possible small change in the geometric location where the front wheel of the trailing two-wheeled vehicle is located is replaced by the rear wheel of the leading two-wheeler, can get by.

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The rigid connection between the front fork of the trailing two-wheeler and the coupling elements. can be done differently according to the curved or straight shape of the free end of the front fork. Around in the case of two-wheelers to be retrofitted, the different widths of the rear fork and front fork To be able to compensate, the coupling elements are expediently on their one another opposite sides and facing each other cranked.

Normally, the wheel diameters of the individual two-wheelers to be coupled to one another in a tandem must match. However, in order also hiez some variation width of eg. 2 "to achieve the coupling elements are rotationally symmetrical and / or provided with at least two mutually offset groups of holes. In this way, a compensation is possible especially when the trailing two-wheeler in order for example. L" smaller Wheels than the leading two-wheeler.

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4 t I «la ι * t * ι

I ff (

Further details and embodiments of the invention are to be found in the following description in which the invention based on the exemplary embodiments shown in the drawing is described and explained in more detail. Show it:

Figure A in side view, partly

broken off, two bicycles coupled to a tandem, 10

FIG. B shows a side view corresponding to FIG. A, with additional the possible height mobility of the following bicycle is shown,

Figures C / C 1 and

C / C 2 in side view the possible

Combination of a tandem

two folding bikes or their 20

possible assembly to one

single folding bike,

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** · «r % r «4« 111

-T-

Figures D and E

in an enlarged representation and in a side view coupling element connections from the leading 2um trailing two-wheeler in the area of the forks in question according to the exemplary embodiments of the present invention,

10

Figures DD and EE each a section length of the corresponding ^ eseichneten lines of Fig. D and E,

Figures F and

Figure FF in an enlarged view and in side view coupling element * » connections between rear wheel » fork of the leading two-wheeler and front fork of the trailing two-wheeler according to two further examples of the present invention,

a section along the correspondingly designated line of Figure F and

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Figure H as partial figures in side view

and attached to the front wheel of the trailing two-wheeled vehicle or enlarged Representation and In

S side view or enlarged

Representation and a triangular coupling element connection in a rear view for assembling a tandem from two single bicycles according to a further embodiment

example of the present invention.

The invention relates to the connection of two bicycles 12 and 13 or 12 * and 13 'by means of a Articulated fitting to a single-track, three-axle team or tandem 11. It extends to see Facilities for such retrofitting of existing two-wheelers (Fig. D, E), the corresponding equipment in production (Fig. F, G, H) and on complete three-axle motorcycles, the corresponding joint functions exhibit. Bicycles were chosen as an example for the graphic representation.

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According to FIG. A, a torsion-resistant articulated truck is created which can be used by one or two people in the manner of a tandem 11. The rear wheel 14 of the front two-wheeler 12 takes the place of the front wheel for the trailing two-wheeler 13 with little or no change in the geometric locations.

The drives and braking systems (including a rim brake for the replaced front wheel) remain unaffected. * The lighting is switched to the devices of the external clamping parts.

From the figure Ά it can also be seen that the curved front fork 16 of the trailing bicycle 13 turned and with its lower end on a pair of coupling elements

17 is rigidly attached. The rigid attachment is here by the black solid triangle

18 shown, which, like the coupling elements 17, will have to be described below.

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The coupling elements 17 are articulated with their ends facing away from the front fork 16 for example on the hub axle 19 of the rear wheel 14 of the leading bicycle 12 rotatable, so that a relative Höhönmobilliehkeit the both bicycles 12 and 13 is possible as a result / that the front fork 16 of the following bicycle 13 is rotatable about, for example, the hub axle 19 is.

As can be seen from Fig. B, the lateral inclination of the clamping parts 12, 13 is inevitable. The remaining The required two degrees of freedom of the cardanic articulation are two swivel joints assigned:

1. the steering head joint 21 of the follower 13, for its lateral deflection (from the display level = path component of the Caster),

2. a pitch joint additionally introduced with the articulation fitting in the form of the coupling elements 17 20 for movements between the trailer

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-Share within the display level (= Track unevenness and height component of the caster).

In the event of a lateral deflection of the steering head joint 21 towards 90 ° (when guiding by hand), is an end limit for the pitch joint 20, which then becomes ineffective as a height joint necessary. It is reached by a stop between the steering head and the luggage rack (Handlebar and saddle) in one direction and a belt loop 29 in the other.

The attachment or hinge fitting 17 is formed on both sides, symmetrically to the plane of representation;

As a height joint 20, it should be adjustable without play, but does not need to have any pronounced bearing properties because of the low deflection to be expected.
20th

In the case of bicycles with a divisible frame, i.e. so-called folding bicycles 12 ', 13', which are in a motor vehicle should be carried, claims the team

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- 12 -

less storage space, in particular for the inner clamping parts connected to form an assembly unit 24, as can be seen from FIG. C / C 1.
5

For temporary use as a single bicycle for one person, folding bicycles of the same type result 12 ', 13' or clamping parts (frame dimensions and fittings, wheel diameter) the relatively simple one Possibility of combining the outer clamping parts 22, 23 instead of separating the Articulations 21 and 22, as can be seen from Fig. C / C 2.

According to FIG. C, folding bikes 12 ', 13' from the rear part 22 of the leading folding bike 12 'and from the front part 23 (without wheel) of the trailing folding bike 13 'formed Mounting unit 24 by pivoting the inclined frame rod 26 from a connecting position with the rear part 27 of the trailing folding bike 13 'in a storage position shown in partial figure C 1 folded and secured there with a frame area of the rear part 22.

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- 13 -

In this way, not only space-saving transport is possible, but it can turn two folding bikes into a tandem with just a few movements and with even fewer movements from this tandem by joining the front part 28 of the leading bicycle 12 'and the rear part 27 of the following bicycle 13' are a single normal folding bike (Teilfig. C 2) can be made.

According to FIGS. D and E, existing two-wheelers 12, 13 or 12 ¹ , 13 ¹ are provided for retrofitting. For this purpose, the front wheel, mudguard and struts of the intended trailer 13 are removed.

The front fork, which is bent at the free end, is turned. The axis points of the Front and rear fork 16, 15 take in Relation to the steering axis of the trailer 13

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symmetrical positions. The dimensions of the front and rear wheel hub accordingly different application spreads are compensated for by the fitting parts 17. 5

The clamping of the fitting 17 on the front fork 16 is the acting forces appropriately broken down into push and pull struts 31/34, which form a triangle (see item 18 in Fig. A). There are also securing straps 37 and pipe clamp 36.

Any existing front wheel rim brake is repositioned in the fork head and reassembled according to the direction of travel.

According to FIG. D, with a concentric arrangement of the vertical joint 20, special axle nuts 44 form the pivot pins. An adaptation to different wheel diameters is possible via different bores 30 (at a distance corresponding to 2 ″ in each case) l> ei the screw connection between the coupling element 17 and the thrust strut 31.

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- 15 -

The case shown in the sectional drawing DD

Connection of a standard front fork '

16 with the concentric to the rear axle 19 J Height joint 20 was due to the fact clearly Ii

The initial geometrical situation obtained was used for the overlooked figures A, B and C. i

According to FIG. D, the nuts on the hub axle 19 or on the nuts screwed there

»1 44 of the rear wheel 14 of the leading bicycle |

12 rotatably held coupling elements M ^ each f a lying on the Südken L, on whose ab- <

turned end each a tension strut 34 and in its t

k in the middle of each a push strut 31 is attached, the %

as will be shown with reference to Figure E, in addition for rigid connection of the coupling element

17 with the front fork 16 of the trailing Bicycle 13 is used. The figure DD shows in section that the coupling element 17 .. inward, i.e. to opposite coupling element is bent to the different widths of the Balance front fork 16 and rear fork 15. The coupling elements 17 .. are at their

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each axle nut 44 is axially secured by lock nuts. A higher setting of the push strut 31 is equalized to the mentioned wheel length reader possible due to the two holes 30 on top of each other «

For an eccentric linkage according to Fig «E are preferably all points suitable / sufficiently close to the rear axle 19 of the Guide wheel 12 lie in a sector that is defined by the vertical under the rear axle 19 and the corresponding extension of the connecting line to the point of application of the front wheel rim brake is limited "

The function of the rim brake and the freedom of movement of the fork head over the rear wheel mudguard remain. There is no significant increase in bending forces for the articulated front fork 16 or of bending and shear forces on the rear wheel clamping.

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The carrier 33 for the pivot pin 32 is clamped in the rear axle nut 44 'and on the clamp of the brake lever , BSW. a similar one on the opposite S side secured against twisting. The articulation coupling elements 1? ₂ can be turned and exchanged to compensate for a ^ -size difference «

In figure E is, however, although the Näbeftäöhße 1d adjacent hinging of the coupling "element 1? ₂ below, wherein the 1st held one end of the substantially straight Köppeleiementes 1? ₂ at a hinge axis 32 on the brake torque lever 33 rotatably. The gegenüberliegende- coupling element 17 ₂ is hinged to a lever, not shown, which has essentially the same shape and fixation as the braking torque lever 33. The end of the coupling element 17 facing away from the braking torque lever 33 is on the one hand with the lower end of the front fork 16 and on the other hand with the interposition of a securing tab 37 a tension strut 34 connected to the upper end

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t It. ···· ·

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is rigidly connected to a clamp 36 clamped to the front fork 16 . The thrust strut 31, which is already partially shown in FIG. _{2 is} attached. This rigid triangular connection is provided in the same way when connecting the coupling element 17 to the front fork 16 according to FIG. The coupling element 17 ₂ can also be cranked like the coupling element 17 ^, but in the manner shown in FIG. EE it is inclined inwards towards the smaller spread width of the front fork 16. The coupling element 17 ₂ is designed in such a way that it is reversely symmetrical that in a turned installation position, in which the outer ends are attached reversed with the relevant front and rear forks, the front fork 16 including the strut triangle of the relevant trailing bicycle 13 is set higher, which means that Wheel differences between the rear wheel of the leading bike and the front wheel of the trailing bike of, for example, 2 " can be compensated for.

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• I ····

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For equipping new two-wheelers 12, 13 or 12 ', 13' ex works, Figures F and G corresponding example concentric and eccentric linkages. The attachment to the front set two-wheeler 12 can each those of the retrofit cases of Figures D and E (with the sections DD / FF and EE). The basic geometry is in everyone Keep case.

The front fork 16 'can be stretched, i. without the usual curvature to reduce caster are executed. It is in the spread regardless of the front hub on a median between the installation dimensions from the front and rear wheel and in the width at the steering head from the beginning to the free To set up a passage for the rear mudguard. She receives special final training for the optional clamping of the coupling elements cranked outwards or inwards cranked cantilever plates for a front wheel.

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ti ItIl Il ·· · ι «·» I

• t Il I · · · «ti

.5 ^s t-5.JO-O · .. '

- 20 -

According to the Pig. F is the coupling element 17, as in FIG. D, this rear wheel of the bicycle in front is attached in an articulated manner indirectly on the hub axle. The coupling element 17 ₃ has a hook-like shape, its elongated end 41 facing away from the hub axle 19 being rigidly connected to the front wheel fork 16 ′, which is designed here in a straight line, by means of two fastening screws. This end 41 of the coupling element 17 'also has two mutually offset groups 42, 43 of bores, which are used to allow the front fork 16' to be raised differently in order to compensate for any differences in diameter in the wheels of the leading and trailing bicycle .12, 13 . In this exemplary embodiment, too, an axle nut 44 is provided according to the partial section FF, on which the coupling element 17 is rotatably and axially fixed by means of lock nuts 46.

According to FIG. G, the coupling element 17 _{4 is} on the braking torque lever 33 or on an opposite corresponding lever on one 25 each

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Axis 32 'rotatably attached. The coupling element 17 * is approximately hockey stick-shaped, the attachment of its elongated end 41 · with the relevant rectilinear end Front fork 16 * is provided in the same way as shown in FIG.

According to FIG. H, both clamping parts can be used as single two-wheelers can be easily prepared. Suitable cranked cantilever plates 51 in a triangular shape with a (Additional) front wheel, mudguard and struts are pre-assembled instead of the coupling elements 17 clamped on both sides with two screws at the fork ends. the Coupling elements 17 can remain articulated on the two-wheeler 12 to be adjusted at the front. The cantilever plates 51 are thus either directly or via coupling elements 17 on the rear wheel of the preceding Articulated bicycle 12.

The triangular cantilever plates 51 shown in FIG. H are not only, as shown there,

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with straight front forks 16 ', but also in the case of the curved front wheel forks 16 shown in accordance with FIGS. A to C applicable. It is only necessary here, the front corner 52 of the triangle in the To put the assembly position of a bicycle backwards, since the curved front fork 16 must be turned to a tandem 11 when connecting to another two-wheeler. Even from this figure it can be seen that the cantilever plates 51 are cranked so that they to the wider rear fork of the preceding bicycle 12 or 12 * will fit. That corner of 52 opposite leg 53 is at two points with the front fork 16 or 16 ' rigidly connected.

The constructions described above can be used not only with bicycles, but also for other two-wheelers, such as motorcycles. For three-axle motorcycles after the described articulated construction are designed, can be when using a seat bridge that is supported deeply on both clamping parts,

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Increase off-road capability (inclines, slopes, bumps) without sacrificing maneuverability. This results in improved traction and lateral guidance thanks to two independently driven riders and a less dramatic shift in the center of gravity on steep slopes.

- End of description -

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Claims (1)

THREE, PATENT LAWYERS " Oe Representatives admitted to the European Patent Office European patent attorneys HANSLANGOSCH Dipl.-Ing (1963-1981) • UWE DREISS Pr. Jiir, Dipl.-ing, M. Sc HEINZ HOSENTHIEN Dr.-lne, DlpL-ing. JÖRN FUHLENDORF Dlpt-Ine- Γ "1 THREE. HOSENTHIEN & FUHLENDORF, D-7000 STUTTGART 1 Applicant: D-7000 STUTToAFTT 6EROKSTRASSEe TF (07Tl) 245734/44 TGIDEAPAT ΓΧ 7-22247 Mead I P I for visitors Robert H. Splittstößer Egerländer Str. 7070 Schwäbisch Gmünd AmM. Act. Z. Off. Ser. No. Your reference Your Ref. Our mark Our Ref. 3819 001 date Date 4.8.1983 F / W Title: Tandem Protection claims 1. Tandem in the form of a bicycle or motorcycle tandem, characterized by two two-wheelers (12, 13; 12 ', 13') that can be connected with one another and one behind the other, of which the trailing two-wheeler (13, 13 ') without a front wheel with its front Frame part (23) on the rear frame part (22) of the leading two-wheeler (12, 12 ') is laterally deflectable and attachable in a vertically movable manner. -2- Postal check account Stuttgart 507 71 -705 (BLZ 6Oi) JOO70) DwadneiSarfKStutt ^ iarT 1.919Θ54 (BLZ Θ0080000) 2. Tandem according to claim 1, characterized in that the trailing two-wheeler (13, 13 ') with the movable part of its steering head joint (21) on the rear frame part (22) of the leading two-wheeler (12, 12') can be fastened for lateral deflection. 3. Tandem according to claim 2, characterized in that the movable part of the steering head joint (21) is the front fork (16, 16 '). 4. Tandem according to claims 1 and 3, characterized in that the front fork (16, 16 ') with a pair of coupling elements (17) is rigidly connectable, the other end of which with the leading two-wheeler (12, 12') in the range of the rear wheel hub (19) of which can be rotatably connected. 5. Tandem according to claim 4, characterized in that the coupling elements (17) are held on the rear wheel hub axle (19) of the leading two-wheeler (12, 12 '). 3819 001 6. Tandem according to claim 4, characterized in that that the coupling elements (17) are kept substantially below about the hub axle (19) on the braking torque lever (33) and at an opposite corresponding lever of the leading two-wheel (12, 12 ¹ J. 7. Tandem according to one of claims 3 to 6, characterized in that the curved front fork (16) of the trailing two-wheeler (13/13 ') is turned and by at least one additional inclined strut (31) with the essentially * borrowed approximately across it extending coupling elements (17) can be rigidly connected. 8. Tandem according to one of claims 3 to 6, characterized in that the rectilinear front fork (16 ') of the trailing two-wheeler (13, 13') can be rigidly connected to the respectively approximately parallel part (41) of the coupling elements (17) is. 9. Tandem according to claim 7 or 8, characterized in that the coupling element (17) is formed by a triangular fitting (51). 3819 O01 • * a • ■ -A- 10. Tandem according to one of claims 4 to 9, characterized in that the coupling elements (17) are cranked on their mutually facing sides. 11. Tandem according to one of claims 4 to 9, characterized * in that the Küppelelemente (17) are provided with symmetrical turning and / or with at least two mutually offset groups of holes (30; 42, 43). - End of claims - 3819 001