DE19603199C2 - Bicycle handlebar - Google Patents

Description

The invention relates to a bicycle handlebar according to Preamble of claim 1, as it is for. B. for bicycles Auxiliary manual drives that are used to drive on a fixed Be used on the road, off-road or as an exercise bike, Is used.

There are bicycles with rotatable handlebars that are known an additional leg-operated rear wheel main drive Chen arm-operated front wheel drive. With help an angled, rotatable handlebar becomes a crank drive realized, so that the arm strength as an additional An driving power can be used via the front wheel.

EP 0 285 115 A2 describes a bicycle with a double drive, So with leg and hand drive, known, in which the handlebars crank firmly connected to a chain or belt drive wheel that is and the front by means of a chain or a belt derrad is driven. The handles of the handlebar crank are similar to the pedals of the foot drive rotatably mounted, so that Gripping hands is not necessary when cranking however, they cannot be blocked. The manual drive is included provided a freewheel device on the front hub, so that with the front wheel turning, rolling and with the steering wheel at rest crank handle no repercussions on the hand crank. The handlebar crank can be held in the handlebar stem into the toothing of the drive wheel or drive chain  engaging bolt in defined angular Positions are locked. When the lock is released the handlebar crank can be turned in both directions, on the one hand the direction intended to drive the front wheel and others in the opposite direction, i.e. H. the freewheel direction. For safe control and braking of the Fahra to enable the manual drive and thus the Len crank crank before initiating steering maneuvers or braking pass through the brake levers attached to the crank bolt are blocked first. This fact be a considerable thing when using the known bicycle Security risk because it wastes a lot of time.

The generic DE 40 13 899 A1 describes a synchronous crank drive with a handlebar crank that has a very complex mess mechanism or by an unlockable ratchet in ver different angular positions can be fixed. Theirs together other aligned and to the handlebar crank rotation Axially parallel, rotatable handles are over different, each between handle and crank orderable blocking mechanisms, also position fixing bar. A quick, secure position fixation during the Driving is both the handlebar crank and the handles not possible.

In DE-PS 12 48 44 a bicycle handlebar is known which has a circumferential toothing in the middle into which a fe the loaded pawl engages like a ratchet. The U-shaped handlebar on which the handles are fixed are, can thus ver in different angular positions are pivoted, but only a few positions make sense are, and only the one with the driver  directed handles.

It is also known that bicycles, depending on the purpose and external circumstances, a shift in focus of the driver or a changed seating position driving much easier. For touring bikes z. B. born a comfortable body for the driver for longer distances enable, but it is in strong headwinds It is an advantage to give the driver the lowest possible grip position to reduce drag. For who for different types of bikes, depending on the intended use differently shaped or curved handlebars commanded. So with mountain bikes the favorable position of the Focus is an essential part of driving or the driving technique. When driving downhill z. B. important to the If possible, center of gravity to the rear via the rear wheel store, however, when going uphill a Verla easier moving the center of gravity forward. While driving the stretched road has an effect on paved paths or roads Posture of the rider over the bike as very tiring and is very uncomfortable. To get a more comfortable posture here enable, it lends itself to the handlebars essentially To arrange vertically upward, horn-like attachments that allow the driver to stand upright, such as B. described in WO 94/27861.

The object of the invention is thus a bicycle handlebar above specify the genus, its handling in particular regarding the position of his handlebar crank and Handles easily, quickly and safely is possible, so that a comfortable and safe driving at any time, with optimal body maintenance of the driver is possible. In addition, its users  particularly on bicycles with additional manual drive be possible easily and easily.

This object is achieved by a generic bicycles handlebars with the characteristic features of the An  spell 1 solved. Advantageous configurations are in the Subclaims marked.

Accordingly, the handlebar crank is assigned a freewheel, so that their rotatability is limited to one direction of rotation, while the direction of rotation in the opposite direction every handlebar position is locked (1st turning limit). By this limitation to a direction of rotation or blocking in the the other direction of rotation will give the driver several variable stu infinitely adjustable handlebar positions, provided, without him actuating a special locking mechanism must. The load on the handlebar against the free rotation direction already results in a stable position, in particular in case of downward loading in the loading facing the driver rich.

So the handlebar of the bicycle z. B. when driving with Headwind in a low position, especially with a possible Longest, fatigue-free tour in an elevated position lung. Of course, these arise Advantages of a rotatable handlebar only when the handlebar has symmetrical gradations or curvatures, so that different handlebar positions with regard to height and distance saddle can be caused by turning the handlebars.

It is advantageous if the ratchet principle ar machining freewheel between the axis of rotation and the crankcase of the  Handlebar is attached, with part of the freewheel with the axle and its other part with the rigid crank housing is non-positively connected.

The rotation limit freewheel can also be in simple, before be attached to the crankcase. Whose component rotating freely in one direction must then with the Axle or part of the handlebars are firmly connected and in such a way that the connection of the handlebars with the Freewheel, when turning in the direction permitted by the freewheel tion, serves as a driver and when the handlebar is loaded the opposite direction the blocking effect of the freewheel is transferred to the handlebar.

A handlebar mounting realized in this way opened also special advantages in terms of security at use according to the invention as a hand crank for an additional Front wheel drive. To do this, the axes of rotation of the handlebars and the handles in a manner known per se, each in the manner of a Crank be spaced so that there is leverage is coming. Particularly favorable for the steerability of the bike affects when the handles on the same axis of rotation have, so are aligned with each other.

On the handlebars can be in a manner known per se drive wheel for a chain or belt drive attached the. The center or axis of rotation of the drive wheel is at the same time the axis of rotation of the handlebar and the drive wheel is at least non-positively connected to the handlebar. The the drive wheel attached to the handlebar stands over a chain or a belt in operative relationship with a functionally equivalent Output wheel that is assigned to the hub of the front wheel. Around  Repercussions on the handlebar and thus on the driver avoid, there is one between the hub and the driven gear known freewheel device interposed. Such Freewheel device should advantageously be attached this way be that when the handlebar crank is at a standstill upward rotating wheel has no effect on the handlebars comes about.

The blocking of the handlebar in one direction of rotation allows that Driver of a bicycle equipped with a manual drive, the Handlebar or crank in a short time in a sta position to then steering or braking songs, e.g. B. by means of hand brakes attached to the crank lever to initiate safely. In the same way, the driver interrupt the hand drive when tired and has a sta bile rest position of the handlebar or crank available without the crank via an external, we do not automatically need to lock the blocking mechanism.

A particularly advantageous development of the invention provides that the handlebars in the respective variable and infinitely variable positions can be locked completely, by also blocking the free direction of rotation. This results in completely stable handlebar positions that then allow the load on the handlebar in the direction in which it was initially rotatable. This measure allows then a changing load on the handlebars in everyone Position. This is particularly important e.g. B. in the case the so-called rocking step when driving uphill.

In a simple way, this complete blocking z. B. can be achieved in that with the rotatable handlebar  firmly connected latch in a rigid crankcase attached disc matched to the shape of the bolt can engage th recesses. The number of recesses then determines the number of completely stable handlebar positions ions.

An absolutely variable locking of the handlebar can be very dangerous partially guaranteed by a second rotation limit be activated by the driver only when he desires a complete locking of the handlebar. This second rotation limit is designed as a further freewheel tet, which is assigned to the first freewheel and in the ratio is counter to this.

It is particularly advantageous if the Direction of rotation of the handlebar of the direction of rotation of the front wheel, in Forward driving corresponds. This results in any case in the lower quarter circle segment facing the saddle a safeguard against spinning handlebars when the driver relies on the handlebars, e.g. B. driving against the wind, and in the upper semicircular segment, a protection against train - off Driver's view - what especially when driving uphill and driving where the reaction force is part of the pedal force is passed over the handlebar, is an advantage.

Furthermore, it is essential to the invention that the rotatability of the rotatable handles attached to the handlebars on the rotary dial tion is limited to that of the opposite direction of rotation of the handlebars. This one-sided rotation limitation can also advantageous due to a simple rotation limitation, e.g. B. in the manner of a ratchet, between the handle and handlebar or firmly connected between the grip body and the handlebar  gripping axis are guaranteed. This only turning wheel the handle allows easy adjustment the handlebar position and allows the driver a safe Hold and firm grip. This causes the wrists do not bean when pushing or pushing the handlebar be spoken.

In addition, this rotatability of the handles guarantees that the Posi tion of the usual for bicycles attached to the handles Controls in a previously set position are fixed and their position on the handles when Twisting the handlebars does not change relatively for the driver different. If, in addition, the control cable of the controls, e.g. B Brake cables and shift cables are attached so that from a moment against the possible direction of rotation of the handles is generated (weight, tension), the position is adjusted tion even when the driver's hand grips the handle releases. This moment also causes the handlebars to move not twisted in the free direction even when the fah Both hands removed from the handlebar.

To a variable and for the diverse needs Ensuring permanent grip is an advantage if ergonomically known on the rotatable handles favorably shaped attachments are attached, for. B. curvatures (Curvature segments) and vertical or vertical grip options (grips / bar ends). So is special rem advantage if the essentially vertical handlebars forward in the direction of travel and at the same time slightly forward is inclined inside or arranged, the normal Posture of an extended, closed fist in optima Handle position accordingly. Through these handle extensions  the center of gravity is shifted so that the grip block tion is always "selected", which increases the blocking speed maturity is achieved.

The invention is based on several embodiments examples described with reference to the drawing.

Show it:

Fig. 1 is a partial perspective view of a handle capable tion of a rotatable bicycle handlebar with two rotary limits,

Fig. 2: a partial perspective view similar to Figure 1 of a rotatable arm with a free-wheeling rotation limit and with a on the handlebar at accommodated chainring.

Fig. 3 is a schematic partial perspective view of the handle bearing with rotation limitation,

FIG. 4 shows a link of Figure 2 with a rotational limit for the handlebar and attached thereto chainring, in a perspective overall view.

FIG. 5 shows a side view of a bicycle handlebar with variable position without front wheel drive, and

Fig. 6: a side view of a bicycle as in Fig. 5, with front wheel drive.

Fig. 1 shows a bearing of a bicycle handlebar according to the invention, in which a handlebar crank 2 (hereinafter referred to as "handlebar") is mounted in a crankcase 1 . The crankcase 1 is connected via a mounting 10 , a handlebar stem 9 and a fork extension 8 with the Fahrradga bel 25 (see FIG. 5). The handlebar rotatable about an axis of rotation 5 is connected via a connection 6 to the outer ring of a first freewheel rotation limiter 3 . The pin-shaped connection 6 , as in Fig. 1 on the Len crank crank 2 can be fixed seated or fixed in this laterally extending. The inner ring of the rotary limiter 3 is frictionally connected to the crankcase 1 , for. B. via a press connection, while the outer ring is only movable in the direction of free rotation. As a result, the handlebar 2 can only rotate in the free rotation direction 11 of the first rotation limit 3 and the driver can first ascertain the handlebar in a desired position by loading the handlebar ent against the free rotation direction of the first rotation limit. In this position, the handlebar is initially still freely movable in the direction of free rotation of the first rotation limit (freewheel ring).

If a complete blocking of the handlebar movement is to be brought about, a second rotation limit 4 is used ver. This second rotation limit 4 has a free rotation direction which is opposite to that of the first rotation limit 3 . The second rotation limit 4 is also attached to the crankcase 1 . The one-way rotatable outer ring of the second rotation limit 4 is axially displaceable and has on its end 3 facing the rotation limit evenly distributed several openings 7 . Due to the axial displacement, the outer ring of the second rotation limit 4 can be pushed onto the first rotation limit 3 as soon as an end-face outer ring opening 7 and the connection 6 face each other in a cursing manner. A completely stable handlebar position is thereby achieved, since the rotation limits 3 and 4 , which each have opposite locking directions 12 , prevent an adjustment of the handlebar. Advantageously, the outer ring of the second rotation limiter 4 can be locked or locked in the pushed position and in the position on the inner ring. The attachment 10 can also be axially extended on both sides so far that it encloses the crankcase (compact inner bearing) as a whole or takes it in, the rotation limits 3 and 4 and the attachment 10 each having a thread on their respective lateral surfaces for mutual attachment.

In the partial view shown in Fig. 2 of a rotatable handlebar 2 with only one rotation limit, a chainring 13 attached to the shaft 2 is provided. Of course, if a belt drive is arranged instead of a chain drive, then a belt drive wheel is arranged instead of the chainring 13 . Here, the bearing 14 of the handlebar 2 is made visible in the crankcase 1 . On the handlebar 2 , the chainring 13 is attached so that the axis of rotation 5 of the handlebar coincides with the axis of rotation of the chainring 13 . The rotation of the handlebar 2 is limited to one direction of rotation by the first rotation limitation 3 . The link 2 is connected to the outer ring of the first rotation limiter 3 via the connection 6 .

Fig. 3 shows the functional structure of a handlebar grip storage with rotation limit. The handle 21 is rotatably supported by a handle bearing 20 on the handlebar 2 or a handle axis 37 fixedly connected thereto. The Grifflage tion 20 , 37 is designed so that an axial displacement of the handle 21 is not possible. Between the handle shaft 37 and handle body acting a ratchet 39 is saw 36 against which, as can be seen from Fig. 3, comprising, inter alia, a bolt 16 with stopper 22 which is mounted to rotate about a fixed grip 21 bolt axis 18. The Rie gel 16 is in engagement with a ratchet wheel 38 attached to the handlebar 2 or on the handle axis 37 with teeth 19 , so that the handle 21 or the handle body 39 can only be rotated in one direction. This rotation of the handle is released by the bolt 16 when, due to the grip movement, the bolt 16 starts against the spring 17 and releases the locking of the handle 21 via the toothing 19 . In the opposite direction of rotation, the stop arm 22 is in contact with the handle body 39 , preventing its rotation. In another embodiment of the ratchet device 36 , the ratchet wheel 38 can be provided with ratchet teeth on the end face and cooperates with a complementary ratchet element effective on the end face. This complementary ratchet element can e.g. B. at least one spring-loaded ratchet pin or a resiliently pressed second ratchet disc, the ratchet pin or ratchet disc being connected to the handle body 39 in a rotationally fixed manner.

Fig. 4 shows a hand crank drive with a rotary limiter for the handlebar 2 and attached chainring 13th It can also be seen here that the handlebar 2 is connected to the rotary limit 3 via the connection 6 . As a result, the handlebar 2 can only be freely rotated in one direction of rotation 23 . As the handles are locked in the same rotational direction 21, the free rotational direction 24, the handles 21 of those 23 opposite the handlebar. 2 It can be seen that the control cables 31 of the control devices, such as. B. for brakes and gear shift, when turning the handlebar 2 and the handles 21 , i.e. when used as a hand crank drive, can not wrap around the rotatable components, or act to prevent movement, since the position of the handles 21 and the additional side handle attachments ( Absolutely not change the bar ends 32 , curvature segments 40 ). The handles 21 rotate when operated as a hand crank drive in the same manner, at the same angular velocity as the rotatable handlebar 2 . In addition, it can be seen that the orientation of the bar ends 32 deviates from the vertical position. For example, there is a slight inclination inwards and a forward inclination in the direction of travel, which enables the hands to be optimally gripped. At the same time, the forward inclined position of the bar ends contributes to the automatic blocking by gravity effect or corresponding moment of force.

As can also be seen from Fig. 4, as handle extensions at the outer end of the handles 21 are first in a ner vertical vertical plane leading downward curvature segment 40 and then a wesentli ches vertically upward leading bar ends 32 hen. These can have different shapes. So z. B. the curvature segment 40 , as shown in FIG. 4, be angularly guided away from the end of the handle or be connected to it by a rounded segment without a curved edge. In addition, the curvature segment 40 can also be angularly connected to the handlebar cone 32 , as shown in FIG. 4, or formed to run into one another via a rounded part, forming a U-shape overall. Through the respective rounded transitions between rule's horizontal handle 21 , curved curvature element 40 and vertical bar ends 32 a handle configuration is provided, on the course of which the rod-shaped handle material can be comfortably encompassed in any position. The optimal grip position, which is preferably assumed, is that of the intersection between the vertical bar ends 32 and the horizontal axis extension of the grip axis of rotation 42 . In this way, optimal power transmission is achieved since the hands are practically in the extension of the horizontal handles 21 in the active position. In this position, the activation of the actuation elements 41 for z. B. brakes and gear shift op timal possible. A good and fatigue-free grip position of the hands on the bar ends 32 is also sufficient that - as can also be seen in FIG. 4 - the Len bar ends are arranged somewhat differently from the vertical orientation. So, as already mentioned, the Len kerhörnchen 32 slightly inclined by an angle 34 inwards and at the same time by an angle 35 forward in the direction of travel. As a result, the hand clenched practically into a fist around the handlebar horns 32 is always held in an optimal position. This counteracts premature signs of fatigue due to ergonomically incorrect hand positioning.

In the in Fig. Bicycle shown 5, with a frame 30, a front fork 25, a saddle 29, the fork extension 8, the stem 9 and the variable steering position (without front wheel drive) it is evident that it is possible, using the bicycle handlebar according to the invention to fix the handlebar 2 in different, variable positions. Thus, the driver can take the most comfortable position for him, e.g. B. sitting or leaning forward.

Finally, in FIG. 6, a bicycle is shown as in FIG. 5, with the handlebar according to the invention, the rotatable handlebar crank 2 being used as a hand crank drive. The chainring 13 attached to the handlebar crank 2 serves as the drive wheel. Via a closed chain 26 , which is a bicycle chain known per se, it is drivingly connected to a chain ring 33 attached to the hub of the front wheel, which serves as an output wheel. A freewheel 27 is arranged between the chainring 33 and the hub of the front wheel, so that when the front wheel is rotating and the crank handle is at rest or the handlebar crank 2 is resting, there is no effect on it.

Reference list

1

Crankcase

2nd

Handlebar crank (handlebar)

3. 1

Rotation limitation (freewheel)

4. 2

Rotation limitation (sliding sleeve)

5

Axis of rotation of the crank bearing

6

connection

7

opening

8th

Fork extension

9

Handlebar stem

10th

Attachment

11

Free rotation direction

12th

Blocking direction

13

Chainring / belt drive wheel

14

Handlebar mounting

15

thread

16

bars

17th

feather

18th

Bolt axis

19th

Gearing

20th

Handle storage

21

Handles

22

Stop / arm

23

Free direction of rotation of the handlebar

24th

Direction of rotation of the handles

25th

fork

26

Chain / strap

27

Freewheel

29

saddle

30th

frame

31

Control trains

32

Bar ends

33

Chainring / driven gear

34

Inward slope

35

Tilt forward

36

Ratchet mechanism

37

Grip axis

38

Ratchet wheel

39

Handle body

40

Curvature segment

41

Actuators

42

Handle axis of rotation

Claims (11)

1.Bike handlebars with an installed transversely to the direction of travel, substantially rotatable about their longitudinal axis, fixed in desired angular positions fixable handlebar crank and provided on this, rotatable, fixable handles, the axes of rotation of the handlebar crank and the handles are spaced and the handles are axially aligned with one another, characterized in that the handlebar crank ( 2 ) is assigned a freewheel ( 3 ), so that its rotatability is limited to one direction of rotation ( 11 ), while the rotation in the opposite direction ( 12 ) in each handlebar position is locked (1. Drehbegren voltage), and that the rotatability of the handles ( 21 ) is limited to one of the direction of rotation ( 11 , 23 ) of the handlebar opposite direction ( 24 ). 2. Bicycle handlebar according to claim 1, characterized in that the handlebar crank ( 2 ) is assigned a second, additionally switchable freewheel ( 4 ) which is effective in the opposite direction to the first freewheel ( 3 ), for complete position blocking (2 . Rotation limit). 3. Bicycle handlebar according to claim 2, characterized in that the outer ring of the second freewheel ( 4 ) is axially displaceable in the manner of a sliding sleeve and positively, for. B. engages through end openings ( 7 ) on the outer ring of the first freewheel ( 3 ). 4. Bicycle handlebar according to claim 1, characterized in that for blocking the direction of rotation of the handles ( 21 ) in one direction between the handle axis ( 37 ) and handle body ( 39 ) effective ratchet device ( 36 ) is provided. 5. Bicycle handlebar according to claim 4, characterized in that as a ratchet device ( 36 ) on the with the handlebar ( 2 ) z. B. firmly screwed handle axis ( 37 ) arranged ratchet wheel ( 38 ) with ratchet teeth ( 19 ) is provided which interacts with complementary, with the handle body ( 39 ) rotatably connected ratchet elements ( 16 , 17 , 118 , 22 ) in a known manner. 6. Bicycle handlebar according to claim 5, characterized in that the ratchet wheel ( 38 ) has an end toothing and the complementary ratchet elements spring-loaded, axial ratchet pins or a resiliently pressed, two tes, with the first ratchet wheel is essentially identical ratchet wheel. 7. bicycle handlebar according to claim 1, characterized in that the horizontal handles ( 21 ) have at their respective outer En the known handle attachments such as ver ver tical bar ends ( 32 ) which are slightly inward, forward in the direction of travel and at the same time in Rotation-blocking direction of the handles ( 21 ) are arranged inclined. 8. bicycle handlebar according to claim 7, characterized in that the handle-extending handle attachments ( 32 , 40 ) lie overall in a substantially vertical plane, with a continuation of the horizontal handle ( 21 ) a downward curved segment ( 40 ) and then this the vertically guided bar ends ( 32 ) are provided. 9. bicycle handlebar according to claim 8, characterized in that the horizontal handle ( 21 ), curvature segment ( 40 ) and Len kerhörnchen ( 32 ) over radio parts flowing into each other over and that the bar ends ( 34 ) a slight inclination ( 43 ) inwards and the Entire handle attachment ( 32 , 40 ), at least at least the bar ends ( 32 ) have an inclination ( 34 ) to the front in the direction of travel, according to the optimal handle position of the hand. 10. Bicycle handlebar according to claim 7, characterized in that the usual controls on a bicycle, for. B. brake lever, shift lever and bell, on the rotatable handle fen ( 21 ) or their attachments ( 32 , 40 ) are attached so that there is no need to change their operation, and that z. B. whose control cables ( 31 ) are guided and attached so that they contribute to the automatic blocking of the handles in one direction of rotation (ideal basic position) with their weight and their voltage arrangement. 11. Bicycle handlebar according to claims 1 to 10, characterized in that when it is used, on a bicycle with separate hand and leg drives, this is attached or stored via a cure bel housing ( 1 ) or directly on the stem ( 9 ) of the bicycle and that on the handlebar crank ( 2 ) a drive wheel ( 13 ) for a chain or belt drive be fastened, which is in operative relationship with a functionally identical, attached to the hub of the steerable front wheel driven wheel ( 33 ) via a chain ( 26 ) or a belt , wherein the driven wheel ( 33 ) is assigned a freewheel device ( 27 ) so that when the front wheel rotates no reaction to the rotatable handlebar ( 2 ) and the direction of rotation ( 11 , 23 ) of the handlebar ( 2 ) the direction of rotation of the Front wheel in forward travel corresponds.