DE19910057A1 - Energy transformer is mounted between relatively reciprocally movable cycle parts, converts relative movement into energy and stores the converted energy - Google Patents

Abstract

The energy transformer has a first attachment device (10) for mounting the energy transformer on a first part (1) of the cycle, a second attachment device (20) for mounting the energy transformer on a second part (2) of the cycle that moves reciprocally wrt the first part, at least one transformer (60) for converting at least some of the energy of the relative motion between the cycle parts and at least one energy storage device (600), e.g. containing gas an hydraulic fluid pumped in by the relative motion. An Independent claim is also included for a servo device with an energy transformer.

Description

The invention relates to an energy transformer. In particular The invention relates to an energy transformer for a Bicycle that has at least two relatively movable, e.g. B. displaceable in a reciprocating manner has bare, shock-absorbing or sprung bicycle parts.

Forces occurring during driving due to impacts, speed Changes in speed, cornering, etc. cause parts sprung against each other, e.g. B. at a front wheel spring suspension, rear wheel suspension, seat post suspension, handlebar suspension, etc. move relative to each other. With known bicycles the vibrations that occur are absorbed by shock absorbers and / or damped by the friction losses of the suspension. In the shock absorbers are subjected to the vibration energy through friction or in hydraulic shock absorbers due to fluid friction subdued. The heat generated by the friction is transferred to the Radiated environment. It is not known at one Bicycle between parts moving relative to each other occurring vibrational energies for the operation of the bicycle harness.

It is therefore the object of the invention to provide a device specify the amount of vibrations that occur when riding a bicycle energies for the operation of the bike.

The object of the invention is achieved with an energy transformer solved according to claim 1. Advantageous embodiments of the Invention are specified in the dependent claims.

The energy transformer according to claim 1 has the advantage that at least part of the kinetic energy of two is relative mutually moving bicycle parts in reusable Energy can be converted.

According to an embodiment of the invention, the Relative movement used to liquid against the gas pressure a gas bubble in a pressure vessel in this pressure vessel to pump.

According to a further embodiment of the invention, the Relative movement used to supply air to a pressure vessel pump.

According to a further embodiment of the invention, the Relative movement used to evacuate a pressure vessel ren.

Advantageously, the one bicycle part Cylinder of the pump and with the other part of the bicycle the piston connected to the pump.

The pump advantageously has check valves trained valves.

According to a further embodiment of the invention, the Relative movement used to create an electrical coil To induce current.  

An intermediate coil is advantageously used as a mechanical shear rectifier used. This has the advantage that elaborate electrical circuits can be omitted.

The formation of the energy transformer as a separate comm component that is preferably already on the outside of the bike existing attachment points, e.g. B. cantilever bolts etc., can be attached has the advantage that the construction relatively simple and almost independent of the different Bike types can be done.

The training of the energy transformer as part of itself Bicycle parts moving relative to one another has the advantage that the energy transformer can be designed more easily. It can also be placed inside existing pipes, the advantageous protection against dirt and damage offer.

The stored according to the invention is advantageously Energy similar to the servo brake in a motor vehicle in the Consumer device, e.g. B. with the brakes, supportive used. Then is only for the actuation of the brake a lower force is required. That is especially before Partly used in downhill races where braking is frequent is required.

A particularly advantageous embodiment of the energy transformators use a hydraulic fluid that is put under pressure. This embodiment can particularly easy in connection with known hydraulic Rim or disc brakes can be used.

Preferably, in this embodiment, Betä adjustment of the conventional brake lever next to the brake piston Actuator that operates the pressurized hydraulic fluid releases such that this additionally to the by operating the conventional brake lever  the brake cylinder exerted force via a line exerts further force on the brake cylinder. Hence one less force when the brake lever is actuated by the Driver required. If the brake lever is released, it closes the actuator and the hydraulic fluid that exerted pressure on the brake piston is preferred via a check valve to a storage container for the hydraulic fluid returned. From the previous The hydraulic fluid can then be stored in the reservoir Energy transformer according to the invention against the force of Gas bubble can be pumped back into the pressure vessel.

In the following the invention with reference to the in the figures Embodiments of the invention shown described. It demonstrate:

Fig. 1 shows a power transformer according to a first imple mentation of the invention;

1A, the operation of the energy transformer of Figure 1 during an upward movement of the piston..;

1B the operation of the energy transformer of Figure 1 during a downward movement of the piston..;

Figure 2 shows an energy transformer according to a second exemplary embodiment of the invention.

Fig. 2A, the operation of the energy transformer of Figure 2 during an upward movement of the piston.

FIG. 2B shows the mode of operation of the energy transformer from FIG. 2 during a downward movement of the piston;

Fig. 3 is a power transformer according to a third imple mentation of the invention;

Fig. 3A, the operation of the energy transformer of FIG 3 in an upward movement of the piston.

Fig. 3B, the operation of the energy transformer of FIG 3 in a downward movement of the piston.

Figure 4 shows an energy transformer according to a fourth exemplary embodiment of the invention.

FIG. 4A is a power transformer according to a variant of the fourth embodiment of the invention;

Fig. 5 shows an exemplary arrangement of the energy transformer according to the invention on a known Fahrradga bel with spring device;

Fig. 1 shows a power transformer 60 in accordance with a first embodiment of the invention. The energy transformer 60 has a cylinder 67 which is fastened to a first bicycle part 1 with a first fastening device 10 . The first bicycle part 1 is arranged to be movable relative to a second driving wheel part 2 . The relative movement is cushioned by a spring device, not shown, and damped by a shock absorber, not shown. In the cylinder 67 , a piston 66 is received, which is fastened to the second driving wheel part 2 with a fastening device 20 . The piston 66 is arranged to be movable in the cylinder 67 in the longitudinal direction of the cylinder 67 , ie along the directions C shown in FIG. 1, and is sealed off from the inner cylinder wall with a seal 661 . The interior 671 of the cylinder 67 is connected via an inlet valve 61 and a line 68 to a reservoir for hydraulic fluid, not shown. The hydraulic fluid is preferably an oil which is also used, for example, for hydraulic brakes on bicycles. The cylinder 67 is also connected via an outlet valve 62 and a line 69 to a storage device 600 which has a pressure vessel 63 which is at least partially filled with a preferably inert gas 64 , for example nitrogen, when the energy transformer 60 is in operation. From the pressure vessel 63 a further line 691 goes off, which can be connected to at least one consumer device (not shown), which can then be supplied with hydraulic fluid under pressure via an actuator (not shown). The inlet valve 61 and the outlet valve 62 are preferably designed as check valves. The consumer device can a circuit, for. B. a hub gear, a derailleur for the front sprocket or a derailleur for the rear sprocket, a braking device, for. B. a hydraulic rim brake, a cable rim brake, a drum brake, a hydraulic disc brake, a drive device, etc.

1A and 1B, the function of the power transformer is described with reference to FIG 60.. In order to avoid unnecessary repetitions, reference is made to the description of FIG. 1 with regard to the parts.

FIG. 1A shows the energy transformer from FIG. 1, the piston 66 moving from the first bicycle part 1 to the second bicycle part 2 , ie in the direction of the arrow A. This movement of the piston 66 creates a negative pressure in the interior 671 of the cylinder 67 . As a result of the negative pressure, the valve 61 opens and hydraulic fluid 65 flows from the reservoir via the line 68 through the valve 61 into the interior 671 of the cylinder 67 . The vacuum in the interior 671 of the cylinder 67 also keeps the exhaust valve 62 in a closed position.

In Fig. 1B, the function of the power transformer 60 is shown in FIG. 1, with the piston 66 of the second bicycle part 2 in the direction of the first bicycle part 1, ie in the direction of the arrow B moves. The liquid sucked into the interior of the cylinder 67 by the opposite movement of the piston 66 is pushed down by the movement of the piston 66 , whereby a pressure is built up in the area of the inlet valve 61 and the outlet valve 62 which is greater than that in the lines 68 and 69 is prevailing pressure. As a result, the inlet valve 61 is forced into a closed position, the outlet valve 62 opens, and hydraulic fluid 65 flows through the outlet valve 62 and the line 69 into the pressure vessel 63 . The gas 64 in the pressure vessel 63 is compressed.

The energy transformer 60 will pump oil into the pressure vessel 63 as long as the pressure exerted by the piston 66 exceeds the pressure of the gas 64 in the pressure vessel 63 . The energy stored by the compression of the gas 74 in the pressure vessel 63 is available for further use in the consumer devices, not shown.

Fig. 2 shows a power transformer 70 in accordance with a second embodiment of the invention. The energy transformer 70 has a cylinder 77 which is fastened to a first bicycle part 1 with a first fastening device 10 . In the cylinder 77 , a piston 76 is arranged to be movable in the longitudinal direction of the cylinder 77 , ie along the directions C shown in FIG. 2, and is sealed off from the inner cylinder wall with a seal 761 . The piston 76 is attached to a second bicycle part 2 with a second fastening device 20 . The first bicycle part 1 is arranged such that it can move in the longitudinal direction of the piston 76 in relation to the second bicycle part. The relative movement is cushioned by a spring device, not shown, and a damping device, not shown, is damped. In the lower region of the cylinder 77 there is an inlet valve 71 which connects the interior 771 of the cylinder 77 either directly or via a line 78 to the ambient air. In the lower region of the cylinder 77 , an outlet valve 72 is also arranged, which is connected via a line 79 to a Speichereinrich device 700 , which has a pressure vessel 73 . A further line 791 extends from the pressure vessel 73 and can be connected to at least one consumer device of the bicycle, not shown. In addition to the examples of consumer devices mentioned in the description of FIG. 1, the compressed air 75 available in the pressure tank 73 of the storage device 700 can also be used, for example, by providing a suitable connector on the line 791 coming from the pressure tank 73 , for the tires of the Pump up the bike.

Figs. 2A and 2B schematically illustrate the operation of the power transformer 70 shown in Fig. 2.

FIG. 2A shows the energy transformer 70 shown in FIG. 2, the piston 76 in the cylinder 77 moving from the first bicycle part 1 in the direction of the second bicycle part 2 , ie in the direction of arrow A. The movement of the piston 76 in the direction of arrow A creates a negative pressure in the interior 771 of the cylinder 77 . As a result, the inlet valve 71 opens and air flows from the surroundings through the line 78 into the interior 771 of the cylinder 77 . The vacuum in the interior 771 of the cylinder 77 also keeps the exhaust valve 72 in a closed position.

Fig. 2B shows the energy transformer 70 of FIG. 2, with the piston 76 of the second bicycle part 2 in the direction of the first bicycle part 1, ie in the direction of arrow B, moves in the cylinder 77. As a result, the air in the interior 771 of the cylinder 77 is pressurized. The energy transformer 70 is shown in a state in which the air in the interior 771 of the cylinder is compressed such that the pressure in the interior 771 of the cylinder 77 exceeds the pressure in the pressure vessel 73 . Therefore, the outlet valve 72 is opened, so that a pressure equalization between the interior 771 of the cylinder 77 and the pressure vessel 73 takes place such that the pressure in the pressure vessel 73 of the storage device 700 increases. The inlet valve 71 is in the closed position because the pressure in the interior 771 of the cylinder 77 is higher than the external pressure.

The energy transformer 70 will pump air into the pressure vessel 73 as long as the pressure in the interior 771 of the cylinder 77 exceeds the gas pressure of the gas 75 in the pressure vessel 73 . The energy stored by the compression of the gas 75 in the pressure vessel 73 is available for further use in the consumer devices (not shown).

Fig. 3 shows an energy transformer 80 according to a third embodiment of the invention. Except for the opposite arrangement of the valves 81 , 82, the energy transformer 80 corresponds to the energy transformer 70 shown in FIG. 2. The cylinder 87 and the piston 86 are arranged in accordance with FIG. 2. The outlet valve 81 is arranged in an opening in the cylinder 87 and is connected either directly or indirectly via the line 87 to the surroundings. The pressure vessel 83 is connected to the interior 871 of the cylinder 87 via the line 89 and the inlet valve 82 . The third embodiment differs from the second embodiment in that when converting the vibration energy occurring during a relative movement between the two bicycle parts into usable energy, no excess pressure is generated in the pressure vessel 73 , but a negative pressure is generated in the pressure vessel 83 of the storage device 800 . The pressure vessel 83 can be connected to a consumer device (not shown) via a line going out from it. Consumer facilities can e.g. B. the devices specified with respect to the first embodiment of FIG. 1.

The mode of operation of the third exemplary embodiment is illustrated in FIGS. 3A and 3B.

Fig. 3A shows the power transformer 80, wherein the piston moves ie 86 of the second bicycle part 2 in the direction of the first bicycle part 1 in the direction of arrow A. As a result, the air which is present in the interior 871 of the cylinder 87 is compressed and expelled via the exhaust valve 81 and, if present, the line 88 as soon as the pressure built up exceeds the pressure in the environment.

Fig. 3B shows the power transformer 80, wherein the piston moves ie in the direction of arrow B 86 of the first bicycle part 1 in the direction of the second bicycle part 2. This creates a negative pressure in the interior 871 of the cylinder 87 . As soon as the vacuum in the interior 871 of the cylinder 87 exceeds the vacuum in the pressure vessel 83 , the inlet valve 82 opens and there is an air flow from the pressure vessel 83 into the interior 871 of the cylinder 87 until the pressure is equalized.

If e.g. B. executes processing vibrational movement against the spring force of the Federeinrich not shown due to a shock, the first bicycle part 1 relative to the second bicycle part 2 is thus pumped out from the power transformer 80 air 85 from the pressure vessel 83, and there is a negative pressure in the pressure vessel 83 generated. This negative pressure in the pressure vessel 83 can be in various, e.g. B. the consumer devices specified above can be used.

In all of the above and shown in FIGS. 1 to 3B embodiments of an energy transformer, a pressure relief valve can be provided if necessary, which opens when or preferably shortly before reaching a permissible maximum pressure in the interior of the cylinder to release the excessive pressure. Such a valve could, for example, be arranged in the piston or in the cylinder wall. In particular sondere in the embodiment of FIG. 1 important to provide it a pressure relief valve, because the piston 66 otherwise no longer downward (direction B of FIG. 1B) could move when the cylinder space is soaked with hydraulic fluid, and the pressure in the pressure vessel is greater than or equal to the pressure inside the cylinder.

Fig. 4 shows a power transformer 90 in accordance with a fourth embodiment of the invention.

The energy transformer 90 has a preferably cylindrical guide device 97 . The guide device 97 is connected to a first bicycle part 1 or fastened thereon with a first fastening device 10 . In the guide device 97 , a magnet 96 , preferably a bar magnet, is movably arranged such that it is movably arranged parallel to the possible relative movement between the two bicycle parts 1 , 2 , which is represented by the double arrow C. The magnet 96 is attached to the second bicycle part 2 with a second fastening device 20 . The first bicycle part 1 is arranged to be movable relative to the second bicycle part 2 . The relative movement is cushioned via a Federeinrich device, not shown, and damped via a Dämpfungsein device, not shown. A coil 94 is arranged outside the guide device 97 and connected to it or fastened thereto. The connections of the coil 94 are connected via lines 98 , 99 to an accumulator, not shown. Alternatively, the guide device can also be formed by the coil 94 itself, provided that it is sufficiently stable.

When there is a relative movement between the two bicycle parts 1 , 2 , the magnet 96 moves in the coil 94 and induces an electrical current there. The current is fed to the accumulator via lines 98 , 99 . Since an alternating current is induced in the coil 94 , the alternating current must be converted, for example by interposing known charging circuits, in such a way that a voltage of the same polarity is always present at the accumulator.

Fig. 4A shows an energy transformer 90 according to a modification of the fourth execution shown in Fig. 4 of the invention.

The energy transformer 90 shown in FIG. 4A differs from the energy transformer shown in FIG. 4 in that a voltage of the same polarity is always induced in the coil 94 by the use of an intermediate coil 95 regardless of the relative direction of movement of the two bicycle parts 1 , 2 , so that the charging circuit connected between the coil 94 and the accumulator can be made simpler or can be omitted because rectification of the induced current is no longer necessary.

The intermediate coil 95 is connected via the guide device 97 and the first fastening device 10 to the first bicycle part 1 and in particular short-circuited with a cable 951 to form a closed circuit. A permanent magnet 96 and a coil 94 attached to it are arranged in the guide device 97 . The permanent magnet is attached to the second driving wheel part 2 with a second fastening arrangement 20 .

If there is a relative movement between the first and second bicycle parts 1 , 2 along the directions of the double arrow C, the permanent magnet 96 and the coil 94 in the intermediate coil 95 move relative to one another in the same direction. The permanent magnet induces an electric current in the intermediate coil 95 . The direction of the current and thus the direction of the magnetic field generated by the intermediate coil depends on the relative direction of movement between the two bicycle parts 1 , 2 or between the permanent magnet 96 and the intermediate coil 95 . During the relative movement between the first and the second bicycle parts 1 , 2 , the intermediate coil 95 and the coil move relative to one another in the same direction, ie in other words that the coil 94 moves in the magnetic field generated by the intermediate coil 95 .

An electrical current is generated in the coil 94 by the movement of the coil 94 in this magnetic field. The direction of the current or the polarity of the voltage that builds up is always independent of the relative direction of movement between the two bicycle parts, because with an opposite relative movement between the coil 94 and the intermediate coil 95, the magnetic field of the intermediate coil 95 is directed in the opposite direction. Therefore, a current is always induced in the coil 94 in the same direction. As a result, a rectifier circuit between the accumulator and the coil 94 can be omitted in this variant of the fourth exemplary embodiment.

The energy stored in the accumulator can then be known way can be used, for example, the above to supply the consumer devices mentioned with energy.

All of the exemplary embodiments shown and described here an energy transformer can be designed such that the function and mode of operation of a spring device and or a shock absorber partially or completely can take over. Then the well-known Federeinrichtun gene and / or shock absorbers used for suspension and damping between the bike parts, either completely omitted or used in smaller versions, if an energy transformer according to the invention is used becomes.

Fig. 5 shows an exemplary arrangement of the power transformers of the invention to a front fork of a bicycle. The energy transformer shown in FIG. 1 is shown by way of example, the same reference numerals being used. The valves, the pressure vessel and the lines, which components the person skilled in the art will suitably arrange with his knowledge, are not shown. The energy transformer is a separate component that can be retrofitted to bicycles. Preferably, existing fastening devices such as, for. B. used the cantilever bolts.

Claims (23)

1. Energy transformer with

• a) a first fastening device ( 10 ) for fastening the energy transformer to a first bicycle part ( 1 ),
• b) a second fastening device ( 20 ) for fastening the energy transformer to a second bicycle part ( 2 ), which is arranged to be movable in a reciprocating manner relative to the first bicycle part ( 1 ),
• c) at least one transformer device ( 60 ; 70 ; 80 ; 90 ) for converting at least part of the energy of the relative movement between the first bicycle part ( 1 ) and the second bicycle part ( 2 ), and
• d) at least one storage device ( 600 ; 700 ; 800 ; 900 ) for storing the energy converted by the transformer device ( 60 ; 70 ; 80 ; 90 ).

2. Energy transformer according to claim 1, wherein
the at least one storage device ( 600 ) has a pressure container ( 63 ) which is at least partially filled with gas ( 64 ), and
the at least one transformer device ( 60 ) is designed to pump a hydraulic fluid ( 65 ) into the pressure container ( 63 ) of the storage device ( 600 ) during a relative movement between the two bicycle parts ( 1 , 2 ). 3. Energy transformer according to claim 1, wherein
the at least one storage device ( 700 ) has a pressure vessel ( 73 ), and
the at least one transformer device ( 70 ) is designed to pump gas or air ( 75 ) into the pressure container ( 73 ) during a relative movement between the two bicycle parts ( 1 , 2 ). 4. Energy transformer according to claim 1, wherein
the at least one storage device ( 800 ) has a pressure vessel ( 83 ), and
the at least one transformer device ( 80 ) is designed to draw off gas or air ( 84 ) from the pressure container ( 83 ) during a relative movement between the two bicycle parts ( 1 , 2 ) in order to create a negative pressure in the pressure container ( 83 ). 5. Energy transformer according to claim 2, 3 or 4, wherein the transformer device ( 60 ; 70 ; 80 )
a cylinder ( 67 ; 77 ; 87 ) with an inlet valve ( 61 ; 71 ; 82 ) and an outlet valve ( 62 ; 72 ; 81 ) which is attached to one of the two bicycle parts ( 1 ; 2 ) with one of the two fastening devices ( 10 ; 20 ) can be fastened, and
has a piston ( 66 ; 76 ; 86 ) arranged in the cylinder ( 67 ; 77 ; 87 ), which can be fastened to the other of the two bicycle parts ( 2 ; 1 ) with the other of the two fastening devices ( 20 ; 10 ). 6. Energy transformer according to claim 5, wherein to the inlet valve ( 61 ; 71 ; 82 ) and to the outlet valve ( 62 ; 72 ; 81 ) lines ( 68 , 69 ; 78 , 79 ; 88 , 89 ) are connected, one of which Lines ( 69 ; 79 ; 89 ) connects the transformer device ( 60 ; 70 ; 80 ) with the storage device ( 600 ; 700 ; 800 ). 7. Energy transformer according to claim 5 or 6, wherein the piston ( 66 ; 76 ; 86 ) with a seal ( 661 ; 761 ; 861 ) is sealed off from the cylinder ( 67 ; 77 ; 87 ). 8. Energy transformer according to claim 5, 6 or 7, wherein the piston ( 66 ; 76 ; 86 ) in the cylinder ( 67 ; 77 ; 87 ) in the direction of the possible relative movement between the two bicycle parts ( 1 , 2 ) is arranged displaceably. 9. energy transformer according to claim 5, 6, 7 or 8, wherein the pressure vessel ( 63 ; 73 ; 83 ) is arranged in a tubular part of the bicycle,
preferably at least one side of the pressure vessel ( 63 ; 73 ; 83 ) is formed by the tubular part. 10. Energy transformer according to claim 9, wherein in addition to the pressure vessel ( 63 ), a reservoir for the hydraulic fluid cal ( 65 ) is arranged in the pipe part. 11. The energy transformer of claim 1, wherein
the at least one storage device ( 900 ) has an accumulator, and
the at least one transformer device ( 90 ) is designed to generate an electrical voltage by induction in the event of a relative movement between the two bicycle parts ( 1 , 2 ) in order to charge the accumulator. 12. Energy transformer according to claim 11, wherein the transformer device ( 90 )
a coil ( 94 ) which can be fastened to one of the two bicycle parts ( 1 ; 2 ) with one of the two fastening devices ( 10 ; 20 ), and
has an at least partially arranged inside the coil ( 94 ) magnet ( 96 ) which can be fastened to the other of the two bicycle parts ( 2 ; 1 ) with the other of the two fastening devices ( 20 ; 10 ) in such a way,
that with a relative movement of the two bicycle parts ( 1 , 2 ) by the magnet ( 96 ) in the coil ( 94 ) an electric current is induced. ' 13. Energy transformer according to claim 11, wherein the transformer device ( 90 )
an intermediate coil ( 95 ) which on one of the two driving wheel parts ( 1 ; 2 ) with one of the two fastening devices ( 10 ; 20 ) can be fastened, and
has an at least partially disposed within the intermediate coil (95) magnet (96) and an at least partially disposed within the intermediate coil (95) coil (94) at the other of the two bicycle components (2; 1) to the other of the two fastening devices ( 20 ; 10 ) can be fastened in this way,
that with a relative movement of the two bicycle parts by the magnet ( 96 ) in the intermediate coil ( 95 ) an electrical current is induced, which in turn induces an electrical current in the coil ( 94 ). 14. The energy transformer according to claim 12 or 13, wherein the magnet ( 96 ) is a permanent magnet or a coil through which current flows. 15. Energy transformer according to claim 11, 12, 13 or 14, wherein on the coil ( 94 ) two lines ( 68 , 69 ) are connected, which are connected with the interposition of an electronic charging circuit with the battery. 16. Energy transformer according to claim 11, 12, 13, 14 or 15, wherein the magnet ( 96 ) in the coil ( 97 ) in the direction of the possible relative movement between the two bicycle parts ( 1 , 2 ) is arranged displaceably. 17. Energy transformer according to one of the preceding claims, wherein the transformer device ( 60 ; 70 ; 80 ; 90 ) is integrated in a frame part and / or fork part of the bicycle. 18. Energy transformer according to one of the preceding claims, wherein the transformer device ( 60 ; 70 ; 80 ; 90 ) can be fastened on the outside to the frame parts and / or fork parts of the bicycle. 19. Energy transformer according to one of the preceding Claims for a bike that has at least one spring device for cushioning the relative movement of two Parts of the front suspension, the rear suspension, the saddle attachment, and / or the frame. 20. Energy transformer ( 60 ; 70 ; 80 ; 90 ) according to one of the preceding claims, wherein the energy transformer ( 60 ; 70 ; 80 ; 90 ) is designed such that it can be arranged in the mode of operation of a spring device between the bicycle parts ( 1 , 2 ) and / or damping device corresponds partially or completely. 21. Servo device with an energy transformer according to one of the preceding claims, with an actuating device, by the actuation of which the energy stored in the storage device ( 600 ; 700 ; 800 ; 900 ) is released in order to be guided to a consumer device. 22. Servo device according to claim 21, wherein the consumer device
a circuit, preferably a hub gear, a derailleur for the front gears and / or a derailleur for the rear sprocket,
a braking device, preferably at least one rim brake or at least one disc brake for braking a movement of an impeller of the bicycle,
a drive device for driving at least one wheel of the bicycle,
a lighting system, which preferably has a front light and a rear light, and is further preferably operable when the bicycle is stationary, and / or
has a tire inflation device for inflating a tire of the bicycle with a connection for a valve of the front or rear wheel of the bicycle individually or in any combination with one another, the connection for the valve preferably being connected to the compressed air container ( 73 ). 23. Servo device according to claim 21 or 22, wherein the actuating device ( 100 ) for releasing the stored energy is coupled to an operating device of the consumer device in such a way that the actuating device ( 100 ) is automatically actuated when the operating device is operated, preferably the automatic coupling between the actuating device and the operating device can be switched off.