DE102010042570B4 - Folding and partially dismountable bicycle - Google Patents

Abstract

Foldable and partially dismantled bicycle (1) with a frame design in parallelogram shape and a diagonal connection (6) that can be fixed by means of a bayonet lock, an equally sized front and rear wheel (22, 23), characterized in that in or near all end points one in parallelogram shape present frame pivot bearings are arranged, which can always be pivoted in a defined plane around an axis and the diagonal connection (6), which can be removed from the frame formation, by a guide sleeve (10), which is at the top of an oblique to the rear wheel (23) divided frame part is attached, is guided and is formed in a fixedly attached receiving sleeve (24) by means of a rotation by 180 ° can be locked in place opposite to a lower inclined frame part, which connects the bottom bracket with the control head (18) and from the control head (18 ) the front frame area of the bicycle (1) by means of a hand knob (27) and, in its extension ng is designed to be removable via a threaded spindle (26), a front wheel fork together with the front wheel (22).

Description

The invention relates to a folding and partially dismountable bicycle, in particular, a training men's or Trekkingrades with equal front and rear wheels between 26 '' and 28 ''. As before, the individual means of transport bicycle enjoyed in almost all age groups of great popularity, and it is used according to its embodiments as a leisure or sports equipment. Since exercise through muscle power also has a health-promoting aspect, cycling is recommended for maintaining physical fitness for a long time. In this respect, a bicycle in addition to everyday and often become habitual transport tasks and tasks to maintain health, so it is necessary to bicycles for the design of an active leisure, vacations, etc. possibly over long distances in one / or often on or at one Car attached, carry. The transport of not folding or not dismountable bicycles is therefore carried out by appropriate structures on a motor vehicle roof or attachments to the rear of a car. Such accessories are completely safely attachable to today's standard, but on the one hand their mass must be transported along and on the other hand it is also the drag of the holder and the / to be transported bike / wheels to overcome. On the other hand, there are always efforts to design folding bicycles or folding bikes, which in the interior, d. H. Trunk of a car can be carried to save space. A user-friendly production of the transport or ready to drive state of a bicycle is first and foremost in the foreground. The entrainment required for assembly or disassembly tools must therefore be completely eliminated due to the required ease of use.

The following is an example of some solutions of the prior art, which deal with the design of a folding bike.

So is after DE 196 02 670 B4 a folding device for a bicycle, especially for a women's bike with the same size front and rear wheels proposed. In the double frame of the bicycle is located in front of the bottom bracket a separation point, which are attached to the respective frame halves mutually overlapping clamping means which are screwed together by means of quick releases. The tubular frame pieces slide into each other during assembly defined. When disassembling, ie loosening the clamping means, the front and the rear frame part together with mounted therein wheel can be stored on each other. At an assembly / disassembly of front fork and handlebar is not thought.

In DE 94 03 966.6 U1 a folding bike is shown, which is equipped with the same size wheels and as a wheel with crossbar corresponds to a standard men's bike. Similarly, located in the vicinity of the bottom bracket a the lower frame separating or connecting screw, so that in front of the bottom bracket pivoting of the rear frame part can be done on the front frame part. Below the seat post there is a pivot bearing, so that a 180 ° turn is possible. The disadvantage here, however, that the rear wheel and the bicycle chain must be off or dismantled.

With EP 1 575 823 B1 a folding bike has become known whose particularity is that the front fork - consisting of several struts - and the handlebar in the direction of the frame are pivoting and also the rear wheel to the rear of the frame - after release of pivot points in the struts of the rear fork - swung out is, where the chain drive, consisting of two sprockets outside of the ring gear on the bottom bracket, not disassembled and swung. The longitudinal extent of the folding wheel in an imaginary horizontal plane is reduced only insignificantly in the pushed-together transport state.

To EP 1 195 319 A1 a folding bike is known, which allows at least 3 joint arrangements in the lower central frame area, near the bottom bracket, a mutual pivoting of a front and a rear frame part. The folding bike here has no upper crossbar and it can be shortened after releasing the lockable hinge assemblies in its length arrangement, and also, as in the aforementioned examples of the prior art, the expansion of the front wheel further reduces the space requirement.

According to JP 2005 349 846 A is proposed a foldable wheel, which has in the vertices of a frame, the parallelogram shape, joints that allows a flat juxtaposition of the frame parts. On the parallelogram of the frame is a central, pivoting tube section, which receives the bottom bracket. The geometry realized here is not suitable for trekking or sport bikes with a crossbar, because then the space required for a transport becomes too large.

The DE 10 2007 057 326 A1 indicates a bicycle with a quick release for a front fork. The attachment mechanism consists of a steering head inner sleeve rotatably mounted in the steering head with a conical receiving space and a conical fork shank pin arranged on the front fork. Other frame parts are not foldable or removable. A connection with a cone is very stable after a tight suit though For the purpose of a quick disassembly of the front fork only difficult to solve.

at CN 2 811 133 Y it is a folding bicycle with a frame, approximately in parallelogram form, with the frame stiffening a seatpost. On the seat post is a form-locking actuated locking mechanism for fixing the unfolded frame. The bottom bracket is located on a frame side, which forms the lower part of the parallelogram. The perch is not released from the frame to trigger the folding mechanism. In the version as a trekking bike, the folding bike in the folded state is too large.

With CN 2 868 828 Y we presented your further folding bike with a pivot bearing on the upper crossbar, which is mounted near the saddle. A reduced parallelogram shape of the frame, formed from a portion of the upper crossbar, an oblique raw connection from the upper crossbar to a gusset plate with bottom bracket and two parts of a rear fork is stiffened by a seat post with attachment to the gusset plate. The folding is given only by loosening the pivot bearing, wherein such a pivot bearing is known. The process of folding is not triggered by loosening the perch. In the version as a trekking bike, the folding bike in the folded state is too large.

To DE 696 29 079 T2 is proposed a telescopic element, in particular for frames with folding bicycles. A clamping element fixes here the extended telescopic element as a diagonal Rahmenaussteifung. A disadvantage of this construction, that the mechanism for small wheel diameter appears appropriate and the telescopic element generates additional mass. In the version as a trekking bike, the folding bike in the folded state is too large.

In DE 197 36 688 A1 a bicycle is introduced, which offers a dismountable frame in two frame parts. The junction has form-fitting interlocking configurations of the opposite frame parts, wherein an external securing is provided by a clamping bracket. By a cable, running in the interior of the two frame parts, the latter are held together, the release of which takes place via a lever on the bicycle handlebar. The frame design is very material-intensive and care must be taken that the contours of the positive connection are not damaged on the two frame parts, otherwise the connection becomes unstable. This bike proves to be unsuitable as a sports bike because of lack of stability and it would turn out to be too big as a trekking bike in the folded state.

With the present state of the art can be seen that there are a variety of applicable ways to create so-called folding or folding wheels that require more or less manual skill in assembly and disassembly and should be particularly suitable for transport within the vehicle ,

However, it is necessary to further minimize the space required for a folding bike, especially if it is a trekking or sports bike with crossbar, so a gentleman's wheel, with also quickly negotiable partial disassembly are beneficial.

Therefore, it is an object of the invention to develop a conventional bicycle with crossbar and substantially parallelogrammartiger frame training such as folding by pivot points are provided near the corners of the frame and stiffened by means of a releasable diagonal connection of the movable frame and can be divided into two equal triangular formations, to further minimize the space requirement, a partially underneath the control head and easily pulled out front fork and retractable bicycle handlebar should be integrated, including no tools is necessary and even a person with little technical knowledge easily master the mechanical processes.

The object of the invention is achieved as follows, reference being made to the basic inventive idea of claim 1. The further embodiment of the invention takes place according to the claims 2 to 9.

The folding and partially dismountable bicycle has a parallelogram-shaped frame, which can be fixed in four pivot points I-IV. Thus, the aforementioned bicycle corresponds to a suitable especially for men trekking or sports. The stiffening of the frame is further characterized in that a diagonal connection is inserted into the frame via a guide sleeve in the region of the saddle to be arranged in a receiving sleeve which is fixedly mounted in the vicinity of the bottom bracket on an inclined frame member. There she receives by means of a bayonet lock their positive fit, which is prevented by rapid tension their accidental rotation. The positive fit of the diagonal connection with the attached saddle is effected by a rotation of 180 ° after insertion into the receiving sleeve. The in the unfolded state of the frame horizontal upper crossbar - driving condition of the trekking or sports bike - consists in particular of a round or square metallic hollow profile, which may preferably be fork-shaped with respect to its two ends. - At Position of a metallic hollow profile are also parallel guided and interconnected via spacer elements metal rods with a round or square cross-section conceivable, preferably the characteristic fork shape is formed in each case at the end of the component. The forked ends of the "crossbar" engage in the pivot points I, IV, which are located on a spacer and on a guide sleeve. The spacer is fixedly connected to the control head, wherein the guide sleeve at the pivot point IV defined pivoting movements between the horizontal upper frame member, the "crossbar" and the oblique rear fork executes when the diagonal connection is taken as a stiffener from the present in parallelogram frame. Another pivot point III is located between the oblique and the horizontal Hiterradgabel, here on both sides of the Hinterradverschraubung a thrust bearing is provided so that regardless of the fixed rear wheel, the pivoting movement can be done in the pivot point III.

The fulcrum II finally takes on an obliquely from the control head to the bottom bracket leading frame part, which opens shortly before the bottom bracket in the aforementioned pivot point II. At the pivot point II is located as a transition to the horizontal rear fork z. B. a short, forked rocker, in which the bottom bracket - at a defined distance from the fulcrum II - is involved. The rear fender has in the training of the bike not only protective function, but it engages a recess formed on a bottom bracket in a designed as a stop pin, so that before definitive fixation of the unfolded bicycle thereby the final frame shape is determined and ultimately by insertion the diagonal connection can also be detected. The control head, as an essential component of each bike, takes on an inventively designed front fork and a bicycle handlebar with handlebar stem. By loosening a manually operated hand knob on the handlebar head leading through the control head and down to a provided with an internal thread lower fitting, which is located in the lower fork area, going threaded spindle is actuated, thereby causing a relaxation in the control head. In this released state, the front fork is completely separable from the frame with the front wheel. For tight fit of the handlebar stem with the fork in the control head is a handlebar limit stop as to generate a tensile force between the handlebar stem and the lower fork area, whereby a surface pressure between the teeth of fittings is done.

The invention will be explained in more detail with reference to an embodiment. Show

1 : Overall perspective view of the folding and partially dismountable bicycle

2 : Sectional view of the steering head with inserted bicycle handlebar and inserted front fork

3 : Representation of the folding without disassembly between handlebar and front fork

4 : Detail of the rear mudguard regarding its engagement with the bottom bracket

The folding and partially dismountable bike 1 has a metallic frame, in particular consisting of hollow sections, wherein the frame in the running state, a parallelogram, which is divided into two equal triangles, comes close. In or near the endpoints of the parallelogram are fulcrums I to IV with the position information 2 to 5 , which by means of a diagonal connection 6 are immovably held firmly in their position. The diagonal connection 6 , which simultaneously performs the function of a seat post, is from above a guide sleeve 10 as a stiffening element in the frame mountable, wherein it is in the vicinity of the bottom bracket in a receiving sleeve 24 slides and there by means of a bayonet lock 7 and a rotation through 180 ° in the direction of bicycle handlebar receives a positive fit, by means of a quick-clamping means on the receiving sleeve 24 is secured. The upper horizontal frame part, the "crossbar", has z. B. fork-shaped ends, so that a connection in both the pivot point I, 2 as well as in the pivot point IV, 5 he follows. The part of the elements oblique and horizontal rear fork 11 . 12 existing rear fork engages on the one hand in the pivot point IV, 5 and secondly in the fulcrum II, 3 one. In the fulcrum II, 3 also opens a diagonal and at the steering head 18 fixedly mounted frame part, starting from there starting a short, forked rocker connects to the following bottom bracket. During the construction of the foldable frame allows the fixed over the rear wheel 23 installed rear fender 9 by means of a recess 8th a distance measurement of the correctly unfolded frame by the recess 8th slides over a bolt attached to the rear of the bottom bracket.

The steering head 18 takes in a sleeve 29 with steering bearings, the bicycle handlebar with handlebar stem and a front fork on, with the handlebar head in the middle of a hand knob 27 , connected to a threaded spindle 26 , is present and the threaded spindle 26 - through the entire control head 18 leading - in an internal thread of the lower area 19 the front fork is firmly screwed. Below the control head 18 the front fork has a lower fitting 20 , which with an upper fitting 21 is in operative connection and the latter with a sleeve 29 connected is. The handlebar becomes after pressing the hand knob 27 detachable upwards by holding firmly on the threaded spindle 26 attached small disc 28 Pressure against the handlebar. Just before final release of the threaded spindle 26 is the separation of the superimposed interfaces of the teeth between the upper and lower mold 21 . 20 causes, by a minimum opposite rotational movement between handlebar and front wheel 22 whose press fit is canceled.

An unintentional mutual twisting in the fittings 20 . 21 around their common central axis is thereby avoided by their superimposed interfaces have an interlocking gearing geometry.

• – äußert platzsparend und in einer Ebene zusammenfaltbares Trekking- oder Sportrad mit 26'' bzw. 28'' großen Rädern, die auch ungleich eingebaut sein können,
• – ohne Werkzeug demontierbares Vorderrad samt Vorderradgabel,
• – Rahmenversteifung mittels einer montier- und feststellbaren Diagonalverbindung,
• – keine Demontage des Antriebes bzw. einer Kettenschaltung erforderlich,
• – trotz einer unwesentlichen Gewichtszunahme des Fahrrades durch die gestalterischen neuen Merkmale bleibt eine hohe Stabilität desselben erhalten.

The advantages of the invention can be summarized in:

• - expresses space-saving and in a plane collapsible trekking or sports bike with 26 '' or 28 '' large wheels, which can also be installed unevenly,
• - removable front wheel with front fork, without tools,
• Frame stiffening by means of a mountable and lockable diagonal connection,
• - no disassembly of the drive or a derailleur required,
• - Despite an insignificant increase in weight of the bicycle by the design new features remains a high stability of the same.

LIST OF REFERENCE NUMBERS

1

Folding and partially dismountable bicycle

2

Fulcrum I

3

Fulcrum II

4

Fulcrum III

5

Fulcrum IV

6

Diagonal connection

7

bayonet catch

8th

recess

9

Rear fender

10

guide sleeve

11

sloping rear fork

12

horizontal rear fork

13

spacer

15

Steering stem

16

handlebar limit

17

Nut

18

control head

19

lower area

20

lower fitting

21

upper fitting

22

front

23

rear wheel

24

receiving sleeve

25

Upper fork part (not shown in detail)

26

screw

27

hand knob

28

Small disc

29

shell

Claims (9)

Folding and partially dismountable bicycle ( 1 ) with a frame formation in parallelogram shape and a fixable by means of bayonet lock diagonal connection ( 6 ), an equal front and rear wheel ( 22 . 23 ), characterized in that in or in the vicinity of all end points of a present in parallelogram frame pivot bearings are arranged, which are always pivotally defined in a common plane about an axis and the diagonal connection ( 6 ), which can be removed from the frame training, by a guide sleeve ( 10 ), which are at the top at an angle to the rear wheel ( 23 ) pointing divided frame part is fixed, is guided and in a her opposite to a lower oblique frame part, which the bottom bracket with the control head ( 18 ), permanently attached receiving sleeve ( 24 ) is latched by means of a rotation of 180 ° and from the control head ( 18 ) of the front frame portion of the bicycle ( 1 ) by means of a hand knob ( 27 ) and, in its extension via a threaded spindle ( 26 ), a front fork with front wheel ( 22 ) is removable. Folding and partially dismountable bicycle ( 1 ) according to claim 1, characterized in that the diagonal connection ( 6 ) after full insertion and after half turn by 180 ° by means of a quick-release lever is fixed. Folding and partially dismountable bicycle ( 1 ) according to claim 1 or 2, characterized in that the upper crossbar of the present in parallelogram frame at its two ends is fork-shaped and in operative connection with the formed as a pivot bearing pivot points 1.1 V ( 2 . 5 ), which on the one hand on a spacer ( 13 ), which at the control head ( 18 ) and on the other hand in the vicinity of the guide sleeve ( 10 ), which from above the diagonal connection ( 6 ). Folding and partially dismountable bicycle ( 1 ) according to claim 3, characterized in that the upper crossbar is a metallic round, square hollow profile or is formed by parallel guided and interconnected round or square solid profiles. Folding and partially dismountable bicycle ( 1 ) according to claim 1, characterized in that a to on both sides of a Hinterradbefestigung mounted thrust bearing, inter alia, as another fulcrum III ( 4 ) the pivotability of a horizontal rear fork ( 12 ) and one at an angle to the rear wheel ( 23 ) pointing, divided frame part, a sloping rear fork ( 11 ). Folding and partially dismountable bicycle ( 1 ) according to one of the preceding claims, characterized in that one fixed over three points, with the obliquely to the rear wheel ( 23 ) extending frame part and a near the rear wheel axle attached to the oblique frame part fender ( 9 ) fulfills a distance function for producing the completely unfolded frame by passing it over a recess ( 8th ) at the end, which points to the bottom bracket, finds an engagement with a bolt on the bottom bracket. Folding and partially dismountable bicycle ( 1 ) according to claim 1, characterized in that the front fork at the lower end of the control head ( 18 ) at their abutting interfaces via a lower and an upper mold ( 20 . 21 ) is secured against unintentional rotation and the lower and upper mold ( 20 . 21 ) is provided in each case with a toothing, which ensures a release of a thereby produced positive connection. Folding and partially dismountable bicycle ( 1 ) according to claim 1, characterized in that a handlebar stem ( 15 ) of the bicycle handlebar with a handlebar limitation ( 16 ), in terms of a depth limit, is firmly connected, whereby you in the control head ( 18 ) insertable area a fit fit with the walls of a sleeve ( 29 ) received in the control head ( 18 ) is stored. Folding and partially dismountable bicycle ( 1 ) according to claim 1 or 8, characterized in that one by the handlebar stem ( 15 ), the handlebar limitation ( 16 ) and the control head ( 18 ) Centrally guided threaded spindle ( 26 ) to a lower fitting ( 20 ) of the lower area ( 19 ) leads the front fork and there is firmly screwed into an internal thread, so that the equipped with a Verzahnungsgeometrie interfaces of the lower and upper mold piece ( 20 . 21 ) are compressible and detachable.

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