DE2538321A1 - Infinitely variable bicycle gear - with hub and drive shaft moved radially to alter relation of internal drive components - Google Patents

Abstract

The bicycle hub (27) rotates in the frame about a fixed axis. An internal drive shaft (65) is adjusted by the gear change control to turn about a second axis so that the hub and shaft can move relative to each other with a radial component. The drive between the shaft and the hub is by a one way clutch and a variable gearing. The system dispenses with complex chain transfer between adjacent sprocket wheels or with a complex epicyclic hub gear. It provides a smooth torque control to suit all types of road conditions. The hub is sealed by a resilient bellows fitted over the movable shaft. A lever and pulley drive may be used to replace chain.

Description

Variable speed vehicle If a bicycle used for walking or over hilly terrain is a gearbox important for a variable speed. Unfortunately there is none the previous systems satisfactory.

For example, the most common one uses the highest gear with changeable Speed of a chain and several sprockets of different diameters. the Fats can be transferred from one chain wheel to another by the manufacturer, u the transmission ratio to change. With this system it is difficult to set the gear ratio selection, because the chain can jump over the desired sprocket. Furthermore, the chain "sling". The best way to do this is to place the chain over the sprockets by edge and under certain circumstances the rear wheel can To block and thus cause damage to the bike and injury to the rider.

Many attempts have been made to overcome these disadvantages. For example, another system uses a full planetary gearbox, to get only three different translations. In general, it does not yield any of these other systems an inexpensive and reliable change gearbox that many different translations possible.

The invention relates to a transmission for different speeds, which generally solves the problems mentioned. The invention also relates to an infinite gear ratio setting and less a proportional gear ratio setting. A high transmission ratio is thus possible.

A feature of the invention is the inclusion of a transmission according to the U.S. Patent Application No. 468,412 dated May 19, 1974 entitled "Variable Speed Transmission "in a vehicle like a bicycle. This transmission gives an infinite Gear ratio adjustment and does not require moving a chain of one sprocket to another.

A significant part of the transmission gear can be in the hub of a wheel of the vehicle, e.g. in the rear wheel. The hub protects the gearbox against damage and prevents the ingress of dust and other contaminants in the working part of the gearbox. In addition, the part of the transmission brings in the hub does not shift weight into the wheel or into the vehicle.

hen part of the gear unit is in the hub, it can be used as a Part of the transmission.

This reduces the number of transmission parts.

Thus, in addition to its usual functions, the XTabe also serves elsewhere Transmission part as well as a housing for at least part of the transmission.

In particular, the transmission can be used for variable speeds in addition to the hub contain an inner rotatable part that is at least partially is in it.

The inner, rotatable part rotates around an axis. The inner, rotatable Part and the hub can extend to each other at a distance with a radial component move to adjust the relative radial position of the axes of rotation of the part and the hub. The inner part and the hub are positively connected by a device, which contains at least one one-way clutch. A facility that is in front of drivers of the Vehicle is operated, is to adjust the relative radial position of the axes of rotation so that the gear ratio between the hub and the more insane part of the Driver can be changed.

Either the hub or the inner one serves as the drive part of the gearbox rotatable part. However, if the hub is serving its usual purposes, then it should inner part can be the drive part and the hub the driven part.

The inner, rotatable part can be attached in various ways and in a preferred embodiment it rotates on a support arm, at least is substantially outside the hub. The support arm is movable, e.g. B. the pans, so that the axis of the inner part moved radially to the axis of the hub will. The holding arm kSnn hold the inner part at two staggered points to one To surrender vehicle for this. The drive part, e.g. a sprocket, edges against the inner, rotatable part located between two offset positions.

The lift has an end wall with a hope through which the inner part] passes through. The opening is so large that it allows radial movement the inner part can accommodate. To protect the parts enclosed in the hub of the gearbox, flexible dishes are provided between the inner part and the hub, to close the opening. The flexibility of the seal allows the radial Movement of the inner part.

The invention also relates to means for holding the inner, rotatable Partly in a chosen position on its path. Although such means are different Can assume shapes, they advantageously contain an elongated frictional connection part coupled to the gearbox, which leads to a point accessible to the driver leads, a practically fixed part on the Rahnen and a locking element that between At least places the parts can be wedged around the elongated part in its Able to hold. The driver can optionally release the locking element from the wedging and so adjust the transmission ratio of the gearbox.

Although the invention is used on many different types of vehicles especially for two- or three-wheeled vehicles, such as bicycles and motorcycles. The invention is very versatile in that it can be converted into a normal pedal crank operated bicycle and into a vertical pedal operated Bicycle can be installed. Located on a verti1-pedal-powered bicycle See the pedals on levers, which in turn are attached to the frame for swinging movement.

If the invention is used in a vertical pedal bicycle, The transmission may contain a device by one or both rocker arms to change the gear ratio between these levers and the wheel of the bicycle is driven around its pivot axis as a function of the angular position of the lever will. Such a device can include a cam with a suitable contour. The gearbox contains a gearbox part that can be prevented by the driver nr, and another part that can be changed as a function of the lever angle. Another The feature of the invention is that the driver-controlled part is driven by the part that responds to the lever angle.

With this arrangement, the manual shift of the transmission changes the Cam function not.

The invention is described with the aid of the drawings.

In these: Figure 1 is a partial side view of a bicycle that is constructed in accordance with the teachings of the invention; Figure 2 is a rear view of the hub and the adjacent construction, the wheel spokes omitted for the sake of clarity are; Figure 3 is a partial side view of the hub and adjacent structure on a larger scale; Figure 4 is a partial sectional view of a preferred one Mechanism for holding the inner rotatable part in place on a larger scale; FIG. 5 shows a section on the line 5-5 of FIG. 1 on a larger scale; Figure 6 a Partial view of a bicycle operated with vertical pedeles according to the teachings the invention is constructed; Figure 7 is a rear view of the bicycle rach figure 6; FIG. 8 shows a section on the line 8-8 of FIG. 6 on a larger scale; Figure 1 FIG. 11 shows a bicycle 11 that includes a frame 13 and a rear wheel 15. The bike 11 is operated by a pedal crank and contains two rotatable on the frame 13 in the usual manner attached cranks 17 with the pedals 190 of the pedals 19 by means of a variable transmission 21 transmit energy to the rear wheel 15.

The transmission 21 contains a transmission part 22, which the driver the gear ratios can change.

Except for the gearbox 21, its 7usarnmenarbeit with the Rest of Fahrrdes 11 and the control device for the transmission of the driver 11 of be of normal construction and the usual parts not shown such as the front wheel, a saddle and handles included.

The frame 13 includes longitudinal frame parts 23 and diagonal frame parts 25 (Figures 1, 2 and 5). The rear wheel 15 is located on the frame parts 23 and 25 and between them and rotates around an axis.

In particular, the wheel 15 includes a central hub 27, which is also represents a part of the transmission part 22.

The near 27 contains an edge turn 29 (Figure 5) and opposite End walls 31 and 33. The end wall 33 has an opening 35. The hub 27 rotates at one end in bearings 37 which are located in the end wall 31. A screw 39 efin et itself in the bearings 37 and is with the frame parts 23 and 35 firmly connected by grids 41.

The near 27 is by means of a bearing 43 and an open end Housing 45 attached to the other end.

The housing 45 has a collar 47, the bearings 43 attached to ore are. in this way the hub 27 rotates and a central axis of rotation 46. The housing is provided with a corresponding fastener such as a screw 49 and a nut 51 attached to the frame parts 23 and 35. It can't turn because of arm 53 by means of a clamp 55 with one end on the housing and with the other on one the frame parts 23 is attached.

The transmission part 22 contains a holding space 57 which is attached to the housing 45 is attached by a fastener 59 and moves on a track. Even though the holding arm 57 can also be exposed to other types of movement with respect to the housing, rotates it is about an axis 60 in the example shown.

If different constructions can also be used, see above contains the holding arm in the illustrated embodiment two T-bar sections 61 and 63 mounted at a distance. The transmission part 29 contains an inner rotatable member 65 attached to bearings 67 and 69. The bearings 67 and 69 carry the inner rotatable part 65, which rotates about a central axis 70, which runs parallel to the axes of rotation 46 and 60.

By moving the HRL arm 57 about its axis 60, the axis 70 becomes moved radially to the axis 46. In a 97irkelstellung the holding arm 57 around his Axis 60, the axes of rotation 46 and 70 coincide.

The inner part 65 is in a corresponding manner by a drive part e.g. a sprocket driven by part 65 in the middle between the sections 61 and 63 is attached. The sprocket 71 is through the cranks 17 over a larger Sprocket 73 (Figure 1) and a chain 75 driven.

The opening 35 is so large that it allows the movement of the inner part 65 with the holding arm 57 on the web sensor can. On the collar 47 and on the holding portion 63 is a flexible seal 77 for closing the opening 35. For Taking up the radial movement of the part 65, the seal 77 is flexible and can of be bellows-like structure. In the example shown, the weighting contains at least 77 a fold 79.

For the frictional connection, the inner part 65 with the hub 27 serves a device, which in the illustrated embodiment several one-way clutches 81 and several drive elements 83 contains. One of the drive elements 83 is for each one-way clutch 81 is provided. There are only a few couplings 81 in FIG shown. However, the linearity of the output improves with the increase in the number of clutches 81.

The one-way clutches 81 are in an axially extending row inner part 65 arranged and run concentrically with this and can in front be of the usual kind. Each clutch 81 drives in one direction and the collar runs freely in the other direction. 3ie coupling 81 is arranged on the inner part 65 so that propel everyone in the same direction. Each clutch 81 drives in one direction and allows relative movement in the opposite direction. For example each clutch 81 can be a split or roll clutch, each of which has internal parts 85 up @ @ @ @ attack the part 65 in the drive direction, and so a rotary joint between the coupling and the inner part, and that in the other direction so it runs freely between the coupling and the inner part in the opposite Direction allows a relative angular movement.

Although the drive elements 83 can be of various constructions can, each drive element is in the illustrated Ausfürhungsbeispiel in the Form a rigid, rotatable by means of a pin to form flanges on the associated coupling coupled link. The flanges on the one-way clutches 81 are distributed around the edge arranged and evenly distributed in the example shown, the axes of rotation wern 46 and 70 coincide.

The outer ends of the drive elements 83 can be rotated in a similarly quiet manner coupled to edge walls 29 of hub 27 by pins 89, which are coupled by pairs of flanges 91 go through, the corresponding on the edge wall appropriate are. The location of the fastenings of the drive elements 83 on the edge wall 29, i.e.

the center lines of the pins 89 are evenly distributed on the edge. In the example shown, the distances 600 and the axes of the nrehbefestiggen between the drive elements 83 and the pulleys 81 and the edge wall 29 run parallel to axes 46 and 70.

The rJarbe 27 thus serves as an outer rotatable part of the transmission 21. The use of the inner part 65, the one-way clutches 81 and the drive elements 83 and the outer rotatable member can be manufactured according to the aforementioned U.S. Patent Application No. 468.412.

The radial distribution between the axes of rotation 46 and 70 de inner Part 65 and the hub 27 can be changed by rotating the holding arm 27 about its axis will.

As a result, the inner part 65 is also moved along an arcuate path and results in the setting in the relative radial positions of the axes of rotation of inner part becomes hub. For individually moving and detachable fastening of the holding arm 57 and the inner portion 65 in one of several positions on this track various control devices such as device 93 may be provided.

Although the controller 93 may take various forms, In the example shown, it contains elongated means or an elongated part 95 that leads from the outer end of the holding arm 57 to a corresponding point which accessible by the rider of the bicycle 11, a practically solid part in the form a housing 97 and several locking elements 99 (Figure 4). Even though the housing 97 can be of various types, it has in the example shown the shape of an elongated tube with an edge wall 101, an end turn 103 and an open end 105. The housing 97 extends through an opening in the housing 45 therethrough and is there by appropriate means z. B. a set screw 107 (Figure 3) held.

The elongated part 95 contains a piston 109 which is in the housing 97 slides and a flexible cable 111 which is rotatable at one end with the piston and with the other at the end of the holding arm 57 in a suitable manner, e.g. through a Pin 113 is connected. The holding arm 57 is, as FIG. 3 shows, by a spring 115 biased with one end on the pin 113 and the other end on the housing 45 is attached. The elongated member 95 also includes a shaft 117 which is attached to the Piston 109 is attached and coaxial therewith and is frustoconical Support surface 119 has, which extends radially outward when it comes from the cable 111 leads away. An annular release member 121 is on an extension 123 of the shaft 117 attached so that it can slide axially on it. The elongated part 95 also includes a push-pull cable 125 that through a threaded plug 127 on Release part 121 is attached and accessible to a rider of the bicycle 11 Body leads.

In the example shown, the locking members 99 have the shape of balls. Several elements 99 can be provided. They become springy on the surface 119 pushed up by a coil spring 129 which is attached to a end rests on the piston 109 and at the other end on a washer 131 which is slidably attached to the piston 117.

D2s housing 97 and the parts in the housing result in a detachable locking device, which is a linear Xinwegkupplung which locks the holding arm 57 against clockwise rotation.

In particular, the spring 129 presses the locking elements between the peripheral wall 101 and the support surface. A forward force on the cable 111 tries the Locking elements 99 more firmly between the support surface 11 and the edge wall 101 to press. As a result, a downward movement of the label becomes 111 and a right turn of arm 57 prevented. An upward force on cable 111 is not applied to the piston 109 transformer because the cable 111 is flexible.

A leftward movement of the arm 57 is, as FIG. 3 shows, by the Spring 115 prevents. In the example shown, the left movement of the arm 57 also in that the inner part 65 seeks a point coaxial to the hub, and prevented by the chain 75 when the bicycle is driven by this. A adjustable stop in the form of a screw 133 (Figure 3) on the lower wall of the housing 45 protrudes upwards so that it is attached to the lower edge of the arm 57 engages when the inner part 65 is coaxial with the hub 27.

In the example shown, all translation ratios are, except 1: 1, by lifting the axle 70 of the inner part 65 above the axle 46 of the hub 27 given.

The gear part 22 can thus be constructed so that it can be moved by moving of the inner part 65 from the coaxial position to the hub 27 are displaced downwards can.

To rotate the holding arm 57 to the right, the driver operates one Lever (not shown) in the usual way to exert a tensile force on cable 125, which is transmitted via the release part 121 to the shaft 117 and piston 109 and this moves upwards, as Figure 4 shows. The locking elements 99 make this possible Upward movement by this movement of the support surface 119 the wedging against seeks to reduce the locking elements. The upward movement of the piston 109 will via the cable 111 to the holding arm 57 transmitter to counter this to the right to rotate the biasing force of the spring 115, as Figure 3 shows. Upon reaching the desired position of the holding arm 57, the upward movement of the cable 125 is ended and thereby the spring 129 can again the locking elements 129 between the support surface 119 and wedge the edge wall 101 firmly.

Although other arrangements can be used, im illustrated example the spring 115 the arm 57 to the right when the driver the Release device triggers. This is done by the driver putting a pressure on it Push-pull cable 125 exerts. This pressing force pushes the release part 121 downward a limited distance at the extension 123 in contact with the locking elements Q9 and this under the support surface 119. This makes the shaft 117 the piston 109 and the cable 111 free for the downward movement. Accordingly, the spring 115 rotates the arm 57 so far to the right, as Figure 3 shows that the figure, the piston down emotional.

When the wheel is in operation, the rotation of the cranks 17 drives the sprocket 71 via the sprocket 73 and the chain 75. This in turn becomes the inner part 65 rotated, the hub 27 via the one-way clutches 81 and the drive elements 83 drives. The ratio of the angular displacement of the part 65 to the hub 27 by adjusting the relative radial position of the axes 46 and 70 can be changed. When both axes 46 and 7n coincide, the transmission ratio is 1 to 1 and when the axis 70 is shifted radially from the axis 46 weÓ this increases Relationship on. Like the arm 57 and thus the inner part 65, an infinite number can assume different positions to the hub 27, will also be an infinite number obtained from gear ratios.

The relative radial positions of the axes 46 and 70 can vary from Driver, as already mentioned, by using the release device 93 or a corresponding other means for adjusting the angular position of the arm 57 can be set. The details of the part, such as the inner part 65, the one-way clutches 81, the drive elements 83 and the hub 27 work together to produce an infinite number To obtain translation ratios, are in the aforementioned patent application Ir. 468.412 explained.

The rotational movement of the arm 57 has very little effect the necessary length of the chain 75. However, an idler roller 134 can be used for tensioning the chain.

Figures 6 to 8 show a vertically parallelized bicycle 11a according to the teachings of the invention, except as specifically pointed out is the bicycle 11a the rider's bike 11 equals 1md corresponding parts are with the corresponding Parts are denoted by the corresponding reference numerals with the addition of an "a".

The bicycle 11a has a frame 13a, according to the patent application Ber. No. 315.497 of December 15, 1972 it can be called "Velocipede". The frame 13a has frame parts 23a and 25a on which the rear wheel 15a in the in the manner shown in Figures 1 to 5 is attached.

The bicycle 11a is operated by hand by the lever 135, which is on Frame 37 for swinging around the pins 37 are attached to them, the swing axis runs parallel to the axis of the wheel 15a and close to it. On the levers 135 and the frame part 25a is coupled to a rod 139 that connects the levers to one another connects. This ensures that when you move a lever 135 at his Downstroke the other lever moves on its upstroke. The linkage 137 can that according to the aforementioned patent application Ser. No. 315,497.

A transmission 21-a transfers power from the pedals to the rear wheel 15a. It contains the cables 141, which with their lower ends on the levers 125 and with their upper ends are attached to cams 143. Each cable 141 is partially round the associated cam 143 reinforced. Each cam 143 has a rim 144 which is designed so that the transmission ratio between de associated lever 135 and the gear part 22a @@ s function of the angular position of this lever changed will. The contour of the edges 144 can be chosen so that this gear ratio can be adapted to the desired results. The cams 143 are through Return springs 142 returned (only one of which can be seen in Figure 6), the attached to the cams and frame 13a.

Each cam 143 is rotatable by bearings 145 in a shaft having a axially stepped bore held.

The cell 147 is in turn rotatably supported by bearings 149 and rotates in a block 151 which is fastened to the frame 13a, for example by screws.

The cams 143 are frictionally engaged by one-way couplings 155 on the Shaft 147 is coupled and held there by a screw 156. Any one-way clutch 155 is arranged to drive the associated lever 135 on the downward stroke and runs freely on the upstroke of the associated lever. Accordingly, the wave becomes 147 driven in one direction and alternately by levers 135.

7 to be the rotational movement of the shaft 147 on the rear wheel 15a a sprocket is attached to the shaft 147 and an endless chain 75a operates together with the sprocket 157 and a transmission part 22a, which is practically the transmission part 22 according to FIG. 5 can be identical.

The chain 75a drives a sprocket (not shown) that the Sprocket 71 of Figure 5 corresponds.

Accordingly, there is a rotational input power at the gear part 22a, which drives the rear wheel 15a in the manner described.

The gear part 22a cannot rotate because of an arm 53a, which is attached to the frame part 25.

The gear part 22a is about 700 to the left from that of the gear part 22 assumed position rotated to the left.

When the bicycle 11a is operated, the vibration drives the levers 135 the cams 143 on and each lever drives the associated cam 143 on its downward stroke and the cam is activated by the associated return spring 142 returned during the upstroke of the Beweligen lever. The wave 147 is in one direction and alternately in front of the cams 143 via the associated one-way clutches driven. The rotary movement of the shaft 147 is transmitted to the gear part 22a from the sprocket 157 and chain 75a.

In the case of the bicycle 11a, the transmission ratio can be adjusted by the rider through the transmission part 22a to get voted. The cams 143 result in the change in the transmission ratio as a function of the angular position of the levers 135.

A feature of the invention is that the cams 143 the gear part Drive 22 so that the cam function through the transmission ratio in the gear unit is not changed.

Although embodiments of the invention have been described, Many changes, conversions and replacement of parts can be made by those skilled in the art without departing from the spirit and scope of the invention.

Summary: The invention relates to a vehicle that is based on a supporting surface moves and a frame, a wheel with one in the middle Hub which is attached to the frame for rotation and has an inner rotatable part, dns is at least partly in the raven.

This part rotates around a second axis. D? S part and the hub move on a path with a radial component to each other to the relative To be able to adjust the position of the two axes. The hub and the inner part contain a one-way clutch. The operator of the vehicle can use the relative radial Adjust the position of the axes of rotation and thus the transmission ratio between 2rabe and choose the inner rotating part.

- patent claims -

Claims (21)

Claims: 1. Vehicle for moving on a supporting surface with a frame, at least one wheel with a central hub, with a first alignment, the one with the hub to the old one of the wheel on the frame and for turning to desem cooperates around a first axis, with the wheel on the The moving surface rolls, drawn by an inner, rotatable part (65), the sic is at least partially in the hub '27), a second device for old of the inner, rotatable part for rotating around a second axis, whereby the inner, rotatable part and the hub to each other on a path with a radial component can move so that the two axes are set in their relative, radial position a drive device with at least one one-way clutch (81) and at least one drive element (83) which connects the inner part (65) to the hub (27) force-fit coupling, whereby the one-way clutch (81) and the drive element (83) can be driven on a path that the inner part (65) describes a device for issuing a force movement än the hub or dss inr, ere because, and a facility to be provided by the driver of the vehicle the relative, radial position of the axis sen can be operated, whereby the Decomposition ratio and the inner part (65) can be set in front of the driver can. 2. Vehicle according to claim 1, characterized in that the one-way clutch (81) is a first one-way clutch, the drive device is a second one-way clutch (81) and that both couplings are inner, accessible part (65). 3. Vehicle according to claim 1, characterized in that d B is the second Device includes a holder arm (57) which is at least substantially outside of the Vabe (27) is that the rotatable part (65) is on the arm (57) and is around the second axis (70) rotates and so the relative radial position of the two axes (46, 70) changes, and that the inner, rotatable part (65) is driven. 4. Vehicle according to claim 3, characterized in that the holding arm (57) is rotatably mounted. 5. Vehicle according to claim 3, characterized in that the support arm (57) the inner part (65) in at least two separate locations (61,63) rotatably carries, and that the inner, rotatable part (65) between the both places. 6. Vehicle according to claim 1, characterized in that the Hub (27) contains an opening (35) having end wall through which the inner Part (65) passes through, which moves on the track, and which is so large that it the movement on the track ka, and that between the inner, rotatable Part (65) and the hub for closing the opening and for taking up the movement of the inner part (65) a flexible seal (77) is provided on the web. 7. Vehicle according to claim 1, characterized in that the drive device (83) has a lever for swinging around an axis and a device made by The driver's foot is operated so that the lever rotates around the axis that the third means the transmission ratio between the lever and a rotatable one Part and the hub as a function of the angular position of the lever around the axis urränder and that the third device with the inner part (65) or the hub (27) is connected, thereby driving the inner part (65) and / or the hub. 8. Vehicle according to claim 1, characterized in that the second Means supporting the inner part (65) for movement on the web, that: the adjustment means contains a fixed part that an elongated part with the inner part (65) is coupled and passes through the fixed part, -ind that at least a locking element (99) is wedged between locations of the part, whereby the elongated Part and dos inner, rotatable part (65) hold in a selected position can, and that the driver can release the locking element (99) optionally so the elongated part for adjusting the radial position of the inner part (35) can move relative to the hub (27). 9. Vehicle according to claim 1, which is driven by a driver!) S, and has a frame and front and rear wheels attached thereto, thereby characterized in that one or two levers are attached to the frame (13), each around be able to pivot an axis of rotation and each of which has a device, that works with the driver's foot to pivot the lever around his axle, that a transmission positively couples the lever with one of the wheels, whereby the Oscillating movement of the levers of this wheel drives the gearbox a first device contains that from the first lever to change the gear ratio between this lever and the wheel as a function of the angular position of the lever about its axis is driven, and that the transmission includes a second device, which of the first means for changing the gear ratio between the second Device and the wheel and the control device is driven by the driver can be operated to control the second device, whereby the driver the Transmission ratio can be chosen arbitrarily. 1C. Vehicle according to claim 9, characterized in that the wheel (11) contains a central hub (27) and that at least one essential Part of the second device is housed in the hub. 11. Vehicle according to claim c ,, characterized in that the first Device a cam, a rotatably mounted shaft and a device with a one-way clutch for rotatably holding the cam on the shaft and the gearbox a device for frictional Coupling the shaft to the second facility contains. 12. Vehicle according to claims 8 and 9, characterized in that that the frame (13) has a force input device for moving relative to this is located, between which and the wheel the gear (22) is, so d through them the wheel is moved that a vo driver to adjust the transmission and thus the over setting ratio to be actuated control device contains an elongated part, ds is non-positively coupled to the gear and leads to a point from Driver can achieve that a practically fixed part attached to the frame and a Snerrelement (99) is wedged at least between locations of the part, to hold the elongated part in a position in which it is built up by the gearbox Keeps transmission ratio constant, and that the control device from the driver to Release of the locking element from the wedging on the parts can be actuated, whereby the driver can en the transmission ratio through the transmission. Fahr3eug according to claim 12, characterized in that the release device at least a piece of the elongated part between the fixed part and the specified location contains. 14. Vehicle according to claim 13, characterized in that the fixed Part includes a housing (45) through which the elongated part passes that the Housing and / or the elongate part has a bearing surface and that the locking element is driven on the support surface, so that the elongated part on the stationary Part is blocked. 15. Vehicle still claim 12, characterized in that the wheel (15) includes a central hub (27) and at least a substantial portion of the gear (21) is housed in the hub. 16. Vehicle according to claim 1, characterized in that the inner, rotatable part (65) has a shaft extending into the hub (27) with which a The drive part of the drive device is frictionally coupled, and that the adjusting device sets the radial position of the shaft. 17. Vehicle according to claim 16, characterized in that the first Means a third means for rotating one end of the hub on the frame (13) and a fourth means for holding the other end of the belongings to the frame, which has a non-rotating part outside the shaft. 18. Vehicle according to claim 17, characterized in that the non-rotating part at least partially surrounds the second device. 19. Vehicle according to claim 1, characterized in that on inner, rotatable part (65) is a one-way clutch and that the drive element frictionally couples the one-way clutch to the Nahe. 20. Vehicle according to claim 1, characterized in that the hub (27) has an edge wall and that the drive device radially outwards runs from the inner part (65) outwards to the edge wall. 21. Vehicle according to the preceding claims, characterized in that that the second device holds the shaft for rotational movement about a second axis of rotation, which practically coincides with the central axis and is relatively close to the tiabe a trajectory with a radial component moves so that the relative radial position of the two axes of rotation can be set that a drive part on the Shaft is to drive this and that a device the radial position of the Shaft and thus the transmission ratio between hub and shaft. L e r s e i t e