DRAWBARE

Description

[0001] The invention relates to a draisine, in particular a running wheel, comprising a straight seat tube, a unit for steering the draisine and a tube for connecting the seat tube and the steering unit, wherein the seat tube and the connecting tube are arranged offset from each other.

[0002] Vehicles of this type are known from CN 103 770 877 A and WO 2017 / 140847 A1, which have a connecting tube that is offset laterally to a seat tube and connects it to a steering unit.

[0003] Another draisine is known to have been used.

[0004] The invention is based on the task of creating a draisine that offers a particularly large number of design freedoms.

[0005] According to the invention, this problem is solved by arranging a longitudinal axis of the connecting tube in a plane of symmetry of the rear wheel that is perpendicular to an axis of rotation of a rear wheel of the draisine.

[0006] Thanks to the arrangement according to the invention, the seat tube and the connecting tube can be offset along a longitudinal axis of the connecting tube and / or the seat tube such that they are arranged side by side. Recesses or passages at the connection points of the tubes, as required in known draisines, are therefore unnecessary. This opens up further possibilities in the design of the draisine, which is preferably two-wheeled and / or single-track.

[0007] In one embodiment of the invention, the position of the seat tube and / or the steering unit along the connecting tube and / or the length of the connecting tube are adjustable. This allows adjustment of the distance between the seat tube and the steering unit, preferably between a rear wheel arranged on the seat tube and a front wheel arranged on the steering unit.

[0008] The connecting tube is advantageously straight, at least in sections, and in particular completely. Advantageously, the connecting tube is attached directly to the seat tube and / or the steering unit. Preferably, the connecting tube is a round tube, a square tube, and / or an oval tube.

[0009] In one embodiment of the invention, the connecting tube is length-adjustable. Advantageously, it is formed from at least two partial tubes, which are preferably arranged at least partially, and particularly preferably coaxially, within one another.

[0010] The connecting tube can be adjusted telescopically. This makes it particularly easy to adjust the distance between the seat tube and the steering unit, especially between the rear and front wheels.

[0011] It is understood that the connecting pipe could be formed from a single pipe.

[0012] The draisine can be designed such that the distance between the seat tube and the steering unit is continuously adjustable or adjustable in predetermined steps.

[0013] Advantageously, the connecting pipe, in particular the section of pipe, is foldable and / or at least partially removable. Preferably, the connecting pipe has at least one joint, in particular a hinge.

[0014] Advantageously, the connecting pipe, in particular at least the partial pipes, has a rectangular, preferably square, triangular, circular and / or oval cross-section.

[0015] Preferably, the connecting tube is detachably attached to the seat tube and / or the steering unit.

[0016] Advantageously, one of the tube sections is connected to the seat tube and / or another of the tube sections is connected to the steering unit, preferably rigidly. In one embodiment of the invention, the latter two tube sections are connected by means of at least one connecting tube section, which also forms one of the tube sections. Advantageously, the tube sections are detachably connected to each other. The connecting tube section is preferably insertable into the two tube sections and can be fastened there by means of a fastening device of the draisine. The connecting tube section could also be designed to be telescopically adjustable. The tube section connected to the seat tube could be permanently connected to the seat tube, preferably by welding.

[0017] Preferably, the connecting tube section is detachably connected to the section attached to the seat tube and / or detachably to the section attached to the steering unit. The connection between the seat tube and the steering unit can be loosened to replace the connecting tube section or to disassemble the draisine.

[0018] In a particularly preferred embodiment of the invention, the connecting tube is formed from two end parts and a joint part. This makes it particularly easy to stow the draisine.

[0019] Advantageously, the end pieces rest against the inner sides of the partial tubes held by the steering unit and the seat tube. Preferably, the end pieces arranged in the partial tubes have a shape that allows them to be connected to the partial tubes in a rotationally fixed manner. This prevents the end pieces from twisting against the partial tubes and makes the wheel particularly stable. The end pieces could be formed by tubes, especially completely straight ones. Advantageously, the end pieces have a rectangular, preferably square, triangular, or oval cross-section. The end pieces preferably have different lengths.

[0020] Advantageously, the end parts are connected to each other by means of the, in particular rigid, joint part, with each end part being pivotally connected to the joint part. Preferably, the joints formed are each in the form of a hinge. This allows each of the end parts to be movable relative to the joint part and the connecting tube to be hinged.

[0021] Preferably, the axes of rotation of the two joints and / or hinges are held at a distance from each other by means of the joint part, which could correspond at least to the width of the partial tubes and / or the end parts.

[0022] In a particularly preferred embodiment of the invention, the draisine is arranged for a comfort driving position and a compact driving position, wherein the distance between the rear wheel and the front wheel, in particular the distance between the seat tube and the steering unit, is greater in the comfort driving position than in the compact driving position.

[0023] Advantageously, switching between the compact and comfort riding positions is possible by changing the length of the connecting tube, replacing the connecting tube with one of a different length, and / or adjusting the position of the seat tube and / or the steering unit along the connecting tube. Preferably, the length of the connecting tube is adjustable by making the position of the section tubes and / or the section tubes and at least one of the end sections, in particular the longer end section, relatively adjustable, preferably by displacement.

[0024] In the comfort driving position, the distance between a rotation axis of the rear wheel and a rotation axis of the front wheel is advantageously at least 1.4 times, preferably 1.4 to 2 times, and particularly preferably 1.6 to 1.8 times, the diameter of the rear wheel or the front wheel, or the sum of the radii of the rear wheel and the front wheel. Preferably, the distance between the rotation axes of the rear wheel and the front wheel in the comfort driving position is 0.5 m to 1.2 m, more preferably 0.5 m to 1 m, and particularly preferably 0.6 m to 0.8 m.

[0025] The draisine can be adjusted to the stride length of a rider, especially continuously or in steps.

[0026] In the compact driving position, the distance between the axes of rotation of the rear wheel and the front wheel is advantageously greater than the sum of the radii of the rear wheel and the front wheel, and is preferably at most 1.2 times, and particularly preferably at most 1.15 times, the sum of the radii of the rear wheel and the front wheel. Preferably, the distance between the axes of rotation of the rear wheel and the front wheel in the compact driving position is 0.3 m to 0.8 m, more preferably 0.4 m to 0.6 m.

[0027] In one embodiment of the invention, in the compact driving position, the connecting tube or at least one of the sub-tubes, in particular the at least one connecting sub-tube, projects beyond the seat tube with its end facing away from the steering unit, and preferably not beyond the rear wheel. Such a draisine is particularly maneuverable and space-saving.

[0028] In one embodiment of the invention, the opposing ends of the partial tube attached to the seat tube and the partial tube attached to the steering unit are abutting each other, the two abutting partial tubes preferably being connected by the connecting partial tube.

[0029] In a particularly preferred embodiment of the invention, the draisine is provided for arrangement in a packed position in which it can be arranged in a particularly space-saving manner, e.g., for storage or transport. Advantageously, the draisine is arranged in the packed position such that the distance between the seat tube and the steering unit is minimal, preferably by reducing the length of the connecting tube to the minimum length, by adjusting the position of the seat tube and / or the steering unit along the connecting tube, and / or by detaching the connecting tube from the seat tube and / or the steering unit.

[0030] The distance between the axes of rotation of the rear and front wheels of the draisine is expediently at most 1.2 times, and particularly preferably at most 1.02 times, the sum of the radii of the rear and front wheels when the draisine is packed. Preferably, the distance between the axes of rotation of the rear and front wheels is the same in the packed and compact driving positions.

[0031] In another packing configuration, the rear and front wheels are positioned side by side. This allows for an even smaller distance between the rotational axes of the front and rear wheels, resulting in an even more compact draisine.

[0032] In one embodiment of the invention, in the packed position, the end of the connecting tube facing away from the steering unit, or at least one of the partial tubes, in particular the at least one connecting partial tube, projects beyond the seat tube and preferably not beyond the rear wheel.

[0033] In one embodiment of the invention, the connecting tube, in particular one of the sub-tubes, is detached from the seat tube and / or the steering unit, and in particular from the other sub-tubes that are held to the seat tube and / or the steering unit, when packed. This allows the draisine to be separated into two separate assemblies. Preferably, the assemblies, in particular the seat tube and / or the steering unit, have means, in particular magnets or clamps, for fastening them to one another. Alternatively, the assemblies are connected in the packed position by means of the folded connecting sub-tube, with each end section being connected to one of the assemblies, in particular one of the sub-tubes. This allows the connecting tube to be folded.

[0034] It is advantageous for the arrangement of the draisine in the packing position if the rear wheel and / or the front wheel is held only on one side in the manner described above.

[0035] In one embodiment of the invention, the steering unit comprises a steering tube that is at least partially, and in particular completely, straight, with the front wheel preferably being arranged exclusively on the steering tube. Advantageously, the rear wheel is preferably arranged exclusively on the seat tube.

[0036] Advantageously, the seat tube or at least a partially, and in particular completely, straight seat post, which is at least partially located in the seat tube, has a holder for a saddle.

[0037] In one embodiment of the invention, when packed, the seatpost is inserted into the seat tube up to a stop, preferably formed by the saddle clamp or the saddle itself. Advantageously, in the packed position, the seatpost protrudes from the seat tube with the end furthest from the saddle clamp. Preferably, the seat tube is completely straight, particularly to allow for this arrangement. Alternatively, in the packed position, the seatpost could be completely removed from the seat tube.

[0038] In one embodiment of the invention, the steering tube or at least a partially, and in particular completely, straight steering support, which is at least partially arranged in the steering tube, has a bracket for a handlebar. The steering support could be slidable and / or rotatable within the steering tube for adjusting the height and / or alignment of the handlebar. Advantageously, the steering tube and the steering support together form a straight tube with a preferably telescopically adjustable length.

[0039] In the packed position, the steering support is expediently inserted into the steering tube up to a stop, which is preferably formed by the handlebar mount and / or the handlebars. In one embodiment of the invention, the end of the steering support facing away from the handlebar mount protrudes from the steering tube in the packed position. Alternatively, the steering support could be completely removed from the steering tube in the packed position.

[0040] A longitudinal axis of the handlebar, preferably a longitudinal axis of a section of the handlebar to which the handlebar is attached by means of the handlebar bracket, is advantageously arranged at an angle to the axis of rotation of the front wheel in the packed position, preferably at an angle of 70° to 90°, particularly preferably 80° to 90°. Preferably, the longitudinal axis of the handlebar, in particular of the section of the handlebar, is arranged perpendicular to the axis of rotation of the front wheel, thus making the draisine narrower in the packed position.

[0041] In one embodiment of the invention, the axis of rotation of the rear wheel is offset from the longitudinal axis of the seat tube such that the seat post can be moved within the seat tube past a wheel axle of the rear wheel. Advantageously, the axis of rotation of the front wheel is offset from a longitudinal axis of the steering tube such that the steering post can be moved within the steering tube past a wheel axle of the front wheel. This makes it possible to move the seat post beyond the axis of rotation of the rear wheel within the seat tube, or the steering post beyond the axis of rotation of the front wheel within the steering tube.

[0042] The rotational axis of the rear wheel is advantageously arranged offset from the longitudinal axis of the seat tube, preferably in the direction away from the steering unit. This offset of the rear wheel increases stability when riding the draisine; in particular, it shifts the center of gravity of the draisine and rider system towards the midpoint between the front and rear axles.

[0043] The rotational axis of the front wheel is advantageously positioned offset from the longitudinal axis of the steering tube, in the direction of the seat tube. This reduces the overall length of the draisine and preferably increases the trail.

[0044] In one embodiment of the invention, the rear wheel axle is held directly or by means of a bracket on the seat tube and / or the front wheel axle is held directly or by means of a bracket on the steering tube.

[0045] The rear wheel mount and / or the front wheel mount is expediently formed by a recess, in particular a tube insert, in the seat tube and / or the steering tube, or by a means for receiving the rear wheel axle and / or front wheel axle, in particular a perforated plate, a square tube and / or a round tube.

[0046] Alternatively or additionally, the rear wheel mount and / or the front wheel mount is a projection, in particular a pin, that extends from the seat tube and / or the steering tube. Advantageously, the projection is arranged on the seat tube or the steering tube and preferably rests against it. The projection could have a recess that at least partially has the shape, preferably a negative shape, of an outer surface of the seat tube and / or the steering tube. Advantageously, a longitudinal axis and / or an axis of symmetry of the projection is identical to an axis of rotation of the rear wheel or front wheel arranged on the projection. Preferably, the projection is at least partially located within the rear wheel or front wheel to which it is attached and could completely pass through and / or extend through it.The attachment is expediently arranged on the seat tube and / or steering tube such that the longitudinal axis and / or axis of symmetry of the attachment is arranged directly on and / or next to the seat tube and / or steering tube.

[0047] In one embodiment of the invention, the rear axle is attached to the seat tube on only one side of the rear wheel by means of the rear wheel bracket, and / or the front axle is attached to the steering tube on only one side of the front wheel by means of the front wheel bracket. This simplifies the assembly and repair of the rear wheel and / or the front wheel and saves weight. The number of components that make up the draisine is reduced. Manufacturing costs can be lowered.

[0048] In one embodiment of the invention, outer tubes, in particular the seat tube, the steering tube, and the connecting tube, especially the section attached to the seat tube and the section attached to the steering unit, have an almost identical inner radius. Inner tubes, in particular the seat post, the steering stem, and optionally the at least one connecting section, could have an identical outer radius. Advantageously, the outer tubes have an inner radius that is equal to or greater than the outer radius of the inner tubes. This allows the inner tubes to be arranged within the outer tubes, preferably slidably.

[0049] In one embodiment of the invention, in the packed position, the seat post is arranged in one of the tube sections, in particular the tube section that is preferably fixedly held to the seat tube or the steering unit. Advantageously, one of the tube sections, in particular the at least one connecting tube section, is arranged in the seat tube or the steering tube in the packed position.

[0050] The seat tube and / or the steering tube could have means, in particular clamps, brackets and / or clamps, for holding the connecting tube, in particular at least one of the sub-tubes, the seat post and / or the steering post.

[0051] Advantageously, the section of the tube attached to the seat tube has a length such that an end of the section facing away from the seat tube projects above the rear wheel no more than to a vertical line tangent to the rear wheel. Preferably, the section of the tube attached to the steering unit has a length such that an end of the section of the tube facing away from the steering unit projects above the front wheel no more than to a vertical line tangent to the front wheel.

[0052] In one embodiment of the invention, the steering unit has a swivel joint with which the steering tube can be pivoted or rotated about an axis of rotation of the swivel joint.

[0053] Advantageously, the steering tube is held at a distance from the pivot axis of the pivot joint. This allows the steering tube to pivot around the pivot axis of the pivot joint.

[0054] Alternatively, the steering tube can be conveniently held by the swivel joint in such a way that the longitudinal axis of the steering tube is identical to the axis of rotation of the swivel joint. This allows the steering tube to rotate about its longitudinal axis.

[0055] The swivel joint is expediently, and in particular directly, connected to the end of the connecting tube or one of the sub-tubes facing the steering unit.

[0056] The steering tube and / or the steering support and the connecting tube or the partial tube connected to the swivel joint are expediently arranged at right angles to each other, in particular at an angle which preferably deviates from a right angle by a maximum of 12°, especially preferably by a maximum of 10°.

[0057] In one embodiment of the invention, the longitudinal axis of the steering tube and / or a longitudinal axis of the steering support and the axis of rotation of the pivot joint are arranged at an angle to each other, preferably less than 5°, particularly preferably less than 3°. Advantageously, the longitudinal axis of the steering tube and / or the steering support and the axis of rotation of the pivot joint are arranged parallel to each other and preferably at a distance from each other.

[0058] In one embodiment of the invention, the axis of rotation of the pivot joint and / or the longitudinal axis of the steering tube and / or the steering support is arranged vertically, in particular perpendicularly. Advantageously, the axis of rotation of the pivot joint, the longitudinal axis of the steering tube and / or the steering support is arranged at an angle between 0° and 20°, preferably between 0° and 12°, and particularly preferably between 4° and 10°, to the vertical.

[0059] The pivot axis of the swivel joint is expediently located in a plane of symmetry of the front wheel that is perpendicular to the rotation axis of the front wheel. The pivot axis of the swivel joint could intersect the longitudinal axis of the connecting tube or of the partial tube connected to the swivel joint.

[0060] The longitudinal axis of the seat tube is advantageously arranged vertically, in particular perpendicularly. The longitudinal axis of the seat tube could be arranged at an angle between 0° and 20°, preferably between 0° and 10°, and most preferably between 0° and 5°, to the vertical.

[0061] Advantageously, the seat tube and the connecting tube are arranged at right angles to each other, in particular at an angle which preferably deviates from a right angle by a maximum of 10°, and especially preferably by a maximum of 5°.

[0062] In one embodiment of the invention, the saddle is arranged centrally above the rear wheel, preferably such that a longitudinal axis of the saddle lies in the plane of symmetry of the rear wheel, which is perpendicular to the rear wheel's axis of rotation. For this purpose, it can be arranged laterally offset on the seat tube or seat post. Advantageously, the seat tube or seat post has an upper end section that is bent towards the steering unit and / or arranged obliquely to the connecting tube, such that the upper end is positioned vertically above the connecting tube. This makes it possible to bring the center of gravity of a rider of the draisine, seated on the saddle, into a plane of symmetry of the rear wheel that is perpendicular to the rear wheel's axis of rotation and to shift it towards the front wheel. It is understood that the end section can form the stop to which the seat post can be inserted into the seat tube.

[0063] In one embodiment of the invention, the saddle is wider at the saddle tip than in the area between the saddle tip and the end of the saddle furthest from the saddle tip. Advantageously, the cross-sectional area perpendicular to the longitudinal axis of the saddle is larger in the area of ​​the saddle tip than in the area between the saddle tip and the end furthest from the saddle tip. In another embodiment of the invention, the saddle tip is inclined upwards. The aforementioned possible embodiments of the saddle according to the invention, both individually and in combination, enable better absorption of the force exerted by a rider sitting on the saddle when pushing the draisine.

[0064] The draisine could have only a single seat tube, a single connecting tube and / or a single steering tube.

[0065] The front wheel and / or the rear wheel preferably have a wheel diameter of 12 inches to 20 inches, preferably 16 inches to 18 inches, particularly preferably 18 inches.

[0066] Advantageously, the draisine has means that prevent the frame tubes from twisting relative to each other, the seat tube and seat post relative to each other, and / or the steering tube and steering stem relative to each other, and / or that fix the length of the connecting tube, the saddle height, and / or the handlebar height, preferably allowing for incremental length adjustments. Such means can be, for example, bolts, screws, grooves and / or edges with corresponding recesses, stops with corresponding counter-stops, and / or clamps. Preferably, the bolts are arranged on a return mechanism that holds the bolts in the recesses.

[0067] In one embodiment of the invention, the draisine has at least one clamp arranged on the connecting tube, by means of which the individual tube sections can be fixed to one another. The clamp advantageously comprises a clamping ring that encompasses one of the individual tube sections and preferably rests completely against the section. To tighten the clamping ring, the clamp could have a clamping element that preferably engages over a corner region of the encompassed individual tube section, which preferably has a rectangular or triangular cross-section. Advantageously, the clamping element connects two side parts of the clamping ring, which preferably span an angle of 45° to 135°, more preferably an angle of 90°. This makes it possible to distribute the clamping forces particularly evenly over the circumference of the clamped individual tube section.

[0068] Advantageously, the section of pipe gripped by the clamps has a longitudinal gap in the corner area where the clamping element engages. This allows the circumference of the gripped section of pipe to be reduced by the clamp, thus clamping a section of pipe and / or end piece located within the gripped section.

[0069] To facilitate the movement of nested tubes relative to each other, especially the end parts and / or sub-tubes relative to the sub-tubes, a sliding layer and / or a sliding surface can be formed between the tubes.

[0070] The draisine could have only a single brake, in particular a rim and / or disc brake, designed exclusively for braking the rear wheel and preferably located on the connecting tube or seat tube. Since the center of gravity of the draisine and rider system is closer to the rear wheel than to the front wheel, it has proven advantageous to have the brake only on the rear wheel.

[0071] Advantageously, the front and / or rear wheel has a drive, preferably a hub motor. The drive could be independent of a pedal crank.

[0072] The invention is further explained below with reference to exemplary embodiments and the accompanying drawings relating to these exemplary embodiments. The drawings show: Fig. 1 a draisine according to the invention in a comfort and compact driving position, Fig. 2 a further seat post of the draisine according to Fig. 1 , Fig. 3 another rear and / or front wheel mount of the draisine according to Fig. 1 , Fig. 4 the in Fig. 1 The draisine shown is in a packed position, Fig. 5 another draisine according to the invention, Fig. 6 another draisine according to the invention in a comfort and compact driving position, Fig. 7 the in Fig. 6 The draisine shown is in two different packing positions, Figs. 8 and 9 show a detailed view of a connecting tube of the draisine. Fig. 6 , Fig. 10 a detailed view of a clamp for locking the in Fig. 8 and 9 shown connecting tube and Fig. 11 a detailed view of a mounting of a rear wheel on a seat tube by means of a projection.

[0073] Fig. 1 Figure 1 shows a draisine 1 according to the invention, comprising a straight seat tube 2 and a steering unit 3. The seat tube 2 and the steering unit 3 are connected to each other via a connecting tube 4, and the seat tube 2 is arranged offset from the connecting tube 4. The seat tube 2 and the connecting tube 4 are arranged at right angles to each other.

[0074] The length of connecting pipe 4 is in Fig. 1(a) The distance between the axis of rotation of a rear wheel 10 and the axis of rotation of a front wheel 11 is, for example, 1.6 times the sum of the radii of the rear wheel 10 and the front wheel 11. This makes the draisine 1, according to Fig. 1(a) arranged in a comfortable driving position.

[0075] A straight seat post 5 is slidably arranged in the seat tube 2, to which a saddle 15 is attached.

[0076] It could also be one in Fig. 2 shown seatpost 5a is provided, the upper end section 5a' of which is bent towards the steering unit 3 and is optionally arranged at an angle to the connecting tube 4 such that the upper end is arranged vertically above the connecting tube 4.

[0077] This shifts the center of gravity of the rider of the draisine 1, seated on the saddle 15, towards the front wheel 11 and into the plane of symmetry of the rear wheel 10, which is perpendicular to its axis of rotation. Furthermore, a bracket 8 for the rear wheel 10 is directly attached to the seat tube 2 such that the axis of rotation of the rear wheel 10 is offset from a longitudinal axis of the seat tube 2 in the direction away from the steering unit 3. In the illustrated embodiment, the rear wheel bracket 8 is a square tube projecting from the seat tube 2, but it could also be a different type of attachment, in particular a pin, a plate, or a round tube.

[0078] The steering unit 3 comprises a straight steering tube 6 in which a straight steering support 7 is slidably arranged, at least partially. A handlebar 16 is held on the steering support 7. Furthermore, a bracket 9 for the front wheel 11 is attached directly to the steering tube 6, by means of which the axis of rotation of the front wheel 11 is offset towards the seat tube 2 relative to a longitudinal axis of the steering tube 6. In the embodiment shown, the front wheel bracket 9 is a plate projecting from the steering tube 6, but a different design is also possible.

[0079] Instead of holding the rear wheel 10 on the seat tube 2 by means of the rear wheel bracket 8 and the front wheel 11 on the steering tube 6 by means of the front wheel bracket 9, a wheel axle 12 of the rear wheel 10 could be attached directly to the seat tube 2 or a wheel axle 13 of the front wheel 11 could be attached directly to the steering tube 6. Furthermore, the rear wheel axle 12 and / or the front wheel axle 13 could have a projection 21;21a. The in Fig. 3 The approaches shown 21;21a are attached directly to the seat tube 2. The one in Fig. 3(b) The approach shown, 21a, has a recess that at least partially surrounds the seat tube 2, as further shown in the detailed view below. Fig. 11 shown, with the attachment 21a arranged on an alternative seat tube 2b. The seat tube 2b differs from the seat tube 2 in that it has a longitudinally extending gap 29b in one end region, which allows the seat tube 2b to widen and thus makes it easier to slide a seatpost (not shown here) within the seat tube 2b. The attachment 21a could be fastened to the seat tube 2,2b, for example by welding. Fig. 3 Although only the mounting of the rear wheel 10 on the seat tube 2 by means of the projection 21, 21a is shown, it is understood that the projections 21, 21a can be arranged in the same way as a mounting of the front wheel 11 on the steering tube 6. It is understood that instead of or in addition to the gap 29b provided in the seat tube 2b, a similarly designed gap can be provided in a Fig. 11 The steering tube, not shown, might be intended for this purpose.

[0080] The rear axle 12 and the front axle 13 are held only on a single side of the respective wheel 10,11 by means of the rear wheel bracket 8 and the front wheel bracket 9, respectively.

[0081] The connecting tube 4 is connected to the steering tube 6 via a pivot joint 14. In the present example, the steering tube 6 is held at a distance from the pivot joint 14 and is therefore pivotable about an axis of rotation of the pivot joint 14. Alternatively, the steering tube 6 could be rotatably mounted about the axis of rotation of the pivot joint 14 by means of the pivot joint 14, if the longitudinal axis of the steering tube 6 is identical to the axis of rotation of the pivot joint 14. Furthermore, in the exemplary embodiment, the longitudinal axis of the steering tube 6 is parallel to the axis of rotation of the pivot joint 14, but could also be arranged at an angle to the axis of rotation of the pivot joint 14.

[0082] The length of the connecting tube 4 is telescopically adjustable. For this purpose, the connecting tube 4 is formed from several partial tubes 4', 4", 4‴, with the partial tube 4' being attached to the seat tube 2 and the partial tube 4‴ being attached to the swivel joint 14. The partial tube 4" forms a connecting partial tube 4", which is arranged within the partial tubes 4', 4‴ and connects the partial tubes 4', 4‴. The connecting partial tube 4" can be, as shown in Fig. 1(b) As shown, the connecting tube 4 is pushed beyond the seat tube 2 through the connecting tube 4'. In this case, the draisine 1 is arranged in a compact driving position, in which the draisine 1 is particularly maneuverable and space-saving. If the connecting tube 4 is formed from a single tube, the connecting tube 4 can project beyond the seat tube 2 in the same way as the connecting tube 4'.

[0083] The distance between the axes of rotation of the rear wheel 10 and the front wheel 11 is, for example, 1.02 times the sum of the radii of the rear wheel 10 and the front wheel 11. If the connecting tube 4 is formed from a single tube, it could have a length such that the distance between the axes of rotation of the rear wheel 10 and the front wheel 11 corresponds to the above. To switch between the compact driving position and the comfort driving position, the connecting tube 4 can be replaced or its length adjusted, as shown in Fig. 1 shown, can be changed. Alternatively or additionally, the seat tube 2 or the steering unit 3 can be moved along the connecting tube 4 in the direction of a longitudinal axis of the connecting tube 4 in order to change the distance between the axes of rotation of the rear wheel 10 and the front wheel 11.

[0084] To prevent the 4', 4", 4' sections, and consequently the seat tube 2 and the steering unit 3, from twisting relative to each other, the 4', 4", 4' sections are equipped with bolts and corresponding recesses 18. Furthermore, the 4', 4", 4' sections could have guide grooves with corresponding counterparts. Clamps 19 are provided for further securing the 4', 4", 4' sections. The 4', 4' sections have longitudinal slots in the end regions where the clamps 19 are located, allowing the connecting 4" section to be clamped or constricted by means of the clamps 19. The distance between the seat tube 2 and the steering unit 3 can be adjusted and fixed in increments using the bolts and recesses 18 and the clamps 19.Particularly in the compact riding position, the distance between the seat tube 2 and the steering unit 3 could also be determined by the lengths of the partial tubes 4',4‴ by having opposing base surfaces of the partial tubes 4',4‴ lie against each other in the compact riding position.

[0085] Because the axis of rotation of the front wheel 11 is offset from the longitudinal axis of the steering tube 6 and the axis of rotation of the rear wheel 10 is offset from the seat tube 2, when the saddle 15 and the handlebars 16 are lowered, the seat post 5 and the steering support 7 can be guided past the rear wheel axle 12 and the front wheel axle 13, respectively. This allows the draisine 1;1a to be moved in the Fig. 4(a) only for the railbike 1 to Fig. 1 The components are arranged in the packing position shown. The saddle 15 and the handlebar 16, or a saddle bracket or handlebar bracket not shown here, form stops for the insertion depth of the seat post 5 into the seat tube 2 and the steering post 7 into the steering tube 6. The seat post 5 protrudes from the seat tube 2 with one end opposite the end intended to receive the saddle 15, and the steering post 7 protrudes from the steering tube 6 with one end opposite the end intended to receive the handlebar 16.

[0086] The connecting tube 4 can be connected to the seat tube 2 in such a way that, when the distance between the axes of rotation of the rear wheel 10 and the front wheel 11 is reduced, the connecting tube 4 projects beyond the seat tube 2. Furthermore, the steering tube 6 can be arranged rotated relative to the steering support 7 so that the longitudinal axis of the handlebar 16 is parallel to a plane of symmetry of the front wheel 11 that is perpendicular to the axis of rotation of the front wheel 11.

[0087] In Fig. 4(b) Another packing position is shown, in which the connecting tube 4 is not as in Fig. 4(a) The connecting tube 4;4a (not shown here) is detached from the pivot joint 14 and the seat tube 2, or the connecting tube 4" is removed from the tubes 4', 4'. This results in two separate assemblies 20, 20', which can be placed next to each other for packing and fastened together using magnets (not shown here). Assembly 20 includes, among other things, the seat tube 2 and the rear wheel 10. Assembly 20' includes, among other things, the steering unit 3.

[0088] The seatpost 5 is removed from the seat tube 2 and inserted into the Fig. 4(b) The seatpost 5 could be inserted into the non-visible partial tube 4'. Furthermore, the seatpost 5 could be held on the outside of the seat tube 2 and / or the head tube 6 by means of pipe clamps (not shown here). Alternatively or additionally, the seatpost 5 could also be held in the partial tube 4' attached to the pivot joint 14 or in the partial tube 4' (not shown here) which is attached to the seat tube 2.

[0089] The steering support 7 is, as already mentioned in Fig. 4(a) The steering support 7 is shown pushed into the steering tube 6 until it reaches a stop and rotated against the steering tube 6, so that a longitudinal axis of the handlebar 16 is arranged parallel to the plane of symmetry of the front wheel 11, which is perpendicular to the axis of rotation of the front wheel 11. Alternatively, the steering support 7 can be removed from the steering tube 6 and arranged on the assemblies 20, 20' in the same way as the seat post 5.

[0090] The 4" connector tube taken from the 4',4' tube sections is in the Fig. 4(b) The seat tube 2, which is not visible, could also be held on the assemblies 20,20' by means of retaining devices not shown.

[0091] In the Fig. 4(b) In the further packing arrangement shown, the planes of symmetry of the rear wheel 10 and the front wheel 11, which are perpendicular to their respective axes of rotation, are arranged opposite each other. The steering tube 6 and the seat tube 2 are arranged between the rear wheel 10 and the front wheel 11.

[0092] The draisine 1 has clamps 19 that rest against the seat tube 2 and the steering tube 6 and grip the seat post 5 and the steering post 7, respectively. This allows the height of the saddle 15 and the handlebars 16 to be fixed.

[0093] The saddle 15 is inclined upwards in the area of ​​the saddle tip 17 and is wider than in an area between the saddle tip 17 and the end of the saddle 15 facing away from the saddle tip 17.

[0094] Furthermore, the draisine 1 has a rim brake (not shown here) for braking the rear wheel 10, which is arranged on the partial tube 4'. Alternatively, it would be conceivable to provide a disc brake on the seat tube 2.

[0095] In Fig. 5 Another draisine 1a according to the invention is shown, which, in comparison to the draisine 1 made of Fig. 1 Instead of the telescopically adjustable connecting tube 4, the device has a fixed-length connecting tube 4a, which is attached to the pivot joint 14 and the seat tube 2. The connecting tube 4a is long enough that the distance between the rear axle 12 and the front axle 13 is, for example, 1.05 times the sum of the radii of the rear wheel 10 and the front wheel 11. This positions the draisine 1a in the compact driving position. Alternatively, the length of the connecting tube 4a can be chosen such that the distance between the rear axle 12 and the front axle 13 is, for example, 1.5 times the sum of the radii of the rear wheel 10 and the front wheel 11. This positions the draisine 1a in the comfort driving position.

[0096] To switch between the compact and comfort riding positions, or to change the distance between the rotation axes of the rear wheel 10 and the front wheel 11, the connecting tube 4a is removable. Furthermore, the position of the seat tube 2 and / or the steering unit 3 could be changed along the connecting tube 4a.

[0097] It goes without saying that the in Fig. 4 The packing positions shown are also for the draisine 1a. Fig. 5 are conceivable.

[0098] To the draisine 1a in the in Fig. 4(b) To arrange the further packing position shown, the connecting tube 4a is detached from the swivel joint 14 and the seat tube 2 and held on the assemblies 20, 20' or arranged in the seat tube 2, provided that the seat post 5 is as shown. Fig. 4(b) shown, removed. Alternatively, the connecting tube 4a could simply be detached from the swivel joint or the seat tube 2.

[0099] Instead of loosening the connecting tube 4;4a, the connecting tube 4;4a could have a hinge and / or a joint to move the draisine 1;1a into the packing position after Fig. 4(b) to move. A draisine 1b with such a connecting tube 4b is in Fig. 6 shown.

[0100] In contrast to draisines 1 and 1a, draisine 1b has a connecting tube 4b, which is formed from two partial tubes 22 and 23 and a connecting partial tube 24. In the illustrated embodiment, partial tube 22 is permanently connected to the seat tube 2b, for example by welding, and partial tube 23 is permanently connected to the pivot joint 14. However, partial tubes 22 and 23 could also be detachably attached to the seat tube 2b and pivot joint 14, respectively.

[0101] The partial pipes 22, 23 are each formed from pipes with a square cross-section, but could also have a different rectangular, oval, or circular cross-section. It is understood that the partial pipes 4', 4", 4' and the connecting pipes 4; 4a could also have a rectangular, oval, or circular cross-section.

[0102] The draisine 1b can be moved from one direction to the other by shifting the partial tubes 22, 23 relative to the connecting partial tube 24. Fig. 6(a) shown comfort driving position in a Fig. 6(b) The compact driving position shown can be moved and vice versa. To fix the connecting tube 4b in the respective driving position, the draisine 1b has clamps 19c which can be opened and closed by means of a clamping lever. This allows the position of the connecting tube section 24 relative to the tube sections 22 and 23 to be fixed.

[0103] In order to make it easier to move the connector section 24 in the section pipes 22,23, a sliding layer is formed on the surface of the connector section 24 facing the inside of the section pipes 22,23.

[0104] The draisine 1b includes a handlebar 16b, which differs from the handlebar 16 in that it has a stem by means of which the handlebar 16 is held at a distance from the steering support 7. It is understood that the stem could also form a component of the steering support 7 or a separate component. Furthermore, the handlebar 16 could be provided instead of the handlebar 16b, and vice versa.

[0105] As an alternative to the draisine designs 1,1a, both a rear wheel 10b and a front wheel 11b are arranged by means of attachments 21a on the left side of the seat tube 2b and a steering tube 6b, respectively, as viewed in the direction of travel. It is understood that the wheels could also be held on the right side of the respective tubes as viewed in the direction of travel.

[0106] The rear wheel 10b and the front wheel 11b are formed here as wheels with spokes and rubber tires mounted on them, but could also be formed in a different way.

[0107] In Fig. 7(a) The draisine 1b is shown in a first packing position, in which the connecting tube 4b is arranged in the compact driving position and the steering support 7 is twisted in the steering tube 6b such that a longitudinal axis of the handlebar 16b is aligned in the direction of a longitudinal axis of the connecting tube 4b.

[0108] To further reduce the packed size of the Draisine 1b, it can be arranged in a second packing position, which is in Fig. 7(c) As shown. In addition to the arrangement made in the first packing position described above, in the second packing position the connecting tube 4b is folded by means of the connecting section tube 24, so that assemblies 20b, 20b' can be arranged lying next to each other. Assembly 20b includes, among other things, the seat tube 2b and the rear wheel 10b. Assembly 20b' includes, among other things, the steering tube 6b and the front wheel 11b. Compared to the one in Fig. 4(b) In the second packing position shown, in which the assemblies 20,20' are separated before being placed next to each other, the two assemblies 20b,20b' are connected to each other by means of the connecting tube 24.

[0109] The seatpost 5 is fully extended from the seat tube 2b and positioned on the outside of the partial tube 22. The draisine 1b has magnets (not shown) for holding the seatpost 5 to the partial tube 22. Alternatively or additionally, the draisine 1b could have other types of retaining devices, e.g., clamps or the like.

[0110] Fig. 7(b) This shows an intermediate position through which one can move from the first packing position to the second packing position. This is in Fig. 8 In a detailed view, the connector section 24 is partially pulled out of the section 22, so that a joint part 26 of the connector section 24 is exposed.

[0111] As in Fig. 8 As shown, the connecting tube 24 is formed from two end parts 25, 27 and the joint part 26. In the illustrated embodiment, the end parts 25, 27 are formed in the form of tubes with a square cross-section, but could also have an oval, circular, or rectangular cross-section. The end part 27 also has a recess at one end facing away from the joint part 26, in the form of a circular segment whose radius corresponds to the outer radius of the pivot joint 14. This allows the end part 27 to be particularly well supported on the pivot joint 14. It is understood that the recess is optional and the end part 27 could have a differently shaped recess or no recess at all.

[0112] Furthermore, the two end parts 25, 27 have different lengths, with end part 25 being longer than end part 27 in the illustrated embodiment. The end parts 25, 27 could also have the same length, or end part 27 could be longer than end part 25.

[0113] The joint part 26 is connected to each end of the end parts 25, 27 such that a joint is formed between the joint part 26 and the end parts 25, 27. This gives the connector tube 24 a double joint, by means of which the connector tube 24 can be folded over, as shown in Fig. 8(c) - (f) shown. In the Fig. 8(e) und 8(f) In the position shown of the connecting tube 24, the draisine 1b can be placed in the second packing position described above. Fig. 7(c) are arranged in such a way that the end parts 25, 27 abut laterally the joint part 26.

[0114] In Fig. 8(a), 8(c) und 8(e) The connecting pipe section 24 is shown in various positions. Fig. 8(b), 8(d) und 8(f) Each shows corresponding sectional views of the connector section 24.

[0115] To illustrate how the connecting pipe 4b can be arranged in the individual positions, the following is shown in Fig. 9 The connecting tube 4b is shown cut out from the draisine 1b, with the seat tube 2b connected to the swivel joint 14 via the connecting tube 4b indicated.

[0116] In Fig. 9(a) The draisine 1b is arranged in the comfort driving position described above. In this position, the end part 25 of the connecting tube 24 is clamped in both the tube 22 and the tube 23 by means of the clamps 19c. The joint part 26 and end part 27 are arranged inside the tube 23, with the end part 27 resting against the pivot joint 14 with its recess.

[0117] If the draisine 1b is to be arranged in the compact driving position or first packing position described above, the clamps 19c are released and the assemblies 20, 20' or the partial tubes 22, 23 are moved towards each other in the direction of the longitudinal axis of the connecting tube 4b until their ends abut each other. The clamps 19c are then tightened again so that the partial tubes 22, 23 are held against the end piece 25. The end piece 25 projects in this direction. Fig. 8(b) The position shown is from an open end of the partial tube 22.

[0118] To arrange the draisine 1b in the second packing position, the joint part 26 is first moved according to Fig. 8(c) exposed. The end part 27 is clamped in the partial tube 23 by means of one of the clamps 19c, and the partial tube 22 is moved away from the partial tube 23 at least by the length of the joint part 26. The end part 25 is held in the partial tube 22 by means of the other clamp 19c. Now the connecting tube 4b can be, as in Fig. 9(d) und 9(e) As shown, the double joint formed by the two joints between the end pieces 25, 27 and the joint part 26 can be folded over. If the connecting tube 4b is folded over, as shown in Fig. 9(e) As shown, completely folded over so that the end parts 25,27 hit the joint part 26, the draisine 1b can be brought into the second packing position.

[0119] In Fig. 10A detailed view of the clamp 19c is shown. The clamp 19c comprises a clamping bracket 28, which rests against the outer surface of the partial tube 22, and a clamping lever 30. By rotating the clamping lever 30, which connects two side parts of the clamping bracket 28 forming a 90° angle, the clamping bracket 28 can be tightened, thereby pressing the partial tube 22 enclosed by the clamping bracket 28 onto the end part 25 located within the partial tube 22. To facilitate the deformation of the enclosed partial tube 22, the partial tube 22 has a longitudinal gap 29, the width of which is reduced as soon as the clamping bracket 28 is tightened by means of the clamping lever 30. The gap 29 is formed in a corner region of the partial tube 22 over which the clamping lever 30 engages. Similarly, the partial tube 23 could also have a gap 29.It is understood that instead of the clamp 19c, a different type of device for clamping the connector section 24 in the section tubes 22,23 may also be provided, e.g. in the form of the clamps 19.

Claims

1. Draisine (1; 1a), in particular a balance bike, which comprises a rectilinear seat tube (2), a unit (3) for steering the Draisine (1; 1a), and a tube (4; 4a) for connecting the seat tube (2) and the steering unit (3), wherein the seat tube (2) and the connecting tube (4; 4a) are arranged so as to be offset with respect to one another, characterized in that a longitudinal axis of the connecting tube (4; 4a) is arranged in a plane of symmetry of the rear wheel (10) perpendicular to an axis of rotation of a rear wheel (10) of the Draisine (1; 1a).

2. Draisine (1; 1a) according to Claim 1, characterized in that the connecting tube (4; 4a) is removable.

3. Draisine (1; 1a) according to Claim 1 or 2, characterized in that the connecting tube (4) is intended to be adjustable in length, in particular telescopically.

4. Draisine (1; 1a) according to one of Claims 1 to 3, characterized in that the position of the seat tube (2) and / or of the steering unit (3) along the connecting tube (4; 4a) is variable.

5. Draisine (1; 1a) according to one of Claims 1 to 4, characterized in that the connecting tube (4) comprises at least two partial tubes (4', 4", 4"'), which are arranged at least partially inside one another, wherein preferably one of the partial tubes (4') is fixedly connected to the seat tube (2) and / or another of the partial tubes (4‴) is fixedly connected to the steering unit (3).

6. Draisine (1; 1a) according to Claim 5, characterized in that one of the partial tubes (4', 4", 4"') forms a connector partial tube (4") that connects at least two of the partial tubes (4', 4"') to one another, in particular releasably, and is preferably arranged within the at least two partial tubes (4', 4‴).

7. Draisine (1; 1a) according to one of Claims 1 to 6, characterized in that the Draisine (1; 1a) is configured to be arranged in a comfort riding position and in a compact riding position, wherein the distance between a rear wheel (10) arranged on the seat tube (2) and a front wheel (11) arranged on the steering unit (3) is greater in the comfort riding position than in the compact riding position.

8. Draisine (1; 1a) according to one of Claims 1 to 7, characterized in that the steering unit (3) comprises a steering tube (6), which is, at least in certain portions, in particular entirely, rectilinear, wherein the steering tube (6) or a steering post (7) arranged at least partially in the steering tube (6) has a mount for a handlebar (16).

9. Draisine (1; 1a) according to one of Claims 1 to 8, characterized in that the Draisine (1; 1a) is configured to be arranged in a packing position in which the length of the connecting tube (4; 4a) is reduced to a minimum length, the position of the seat tube (2) and / or of the steering unit (3) along the connecting tube (4; 4a) is adjusted to a minimum distance and / or the connecting tube (4; 4a) is detached from the seat tube and / or the steering unit.

10. Draisine (1; 1a) according to Claim 9, characterized in that, in the packing position, a seat post (5) arranged at least partially in the seat tube (2) projects, by way of the end facing away from a mount for a saddle (15), out of the seat tube (2) and / or the end of the steering post (7) facing away from the handlebar mount projects out of the steering tube (6), wherein the steering post (7) is preferably rotated in the steering tube (6) in such a manner that a longitudinal axis of the handlebar (16) is arranged at an angle of 70° to 90° with respect to the axis of rotation of the front wheel (11).

11. Draisine (1; 1a) according to Claims 4 and 9, according to Claims 4 and 10, according to Claims 5 and 9 or according to Claims 5 and 10, characterized in that, in the packing position, at least one of the partial tubes (4"), in particular the connector partial tube (4"), is arranged in the seat tube (2) and / or the seat post (5) is arranged in another partial tube (4').

12. Draisine (1; 1a) according to one of Claims 1 to 11, characterized in that the connecting tube (4; 4a), in particular in the compact riding position and / or the packing position, projects, by way of its end facing away from the steering unit (3), beyond the seat tube (2).

13. Draisine (1; 1a) according to one of Claims 1 to 12, characterized in that the rear wheel (10) is arranged on the seat tube (2) in such a manner that a wheel axle (12) of the rear wheel (10) is held on the seat tube (2) directly or by means of a mount (8).

14. Draisine (1; 1a) according to one of Claims 8 to 13, characterized in that an axis of rotation of the front wheel (11) is arranged so as to be offset towards the seat tube (2) with respect to a longitudinal axis of the steering tube (6).

15. Draisine (1; 1a) according to one of Claims 8 to 14, characterized in that the steering unit (3) has a rotary joint (14) by means of which the steering tube (6) can be pivoted about the axis of rotation of the rotary joint (14), wherein the steering tube (6) is preferably held at a distance from the axis of rotation of the rotary joint (14).