DE29706743U1 - Bicycle or mountain bike with electric motor - Google Patents

Description

Applicant: Reinhard WetzeL, Albris 1, 88260 Argenbühl Description of the invention Bicycle or mountain bike with an electric drive '.

The invention belongs to the technical field of vehicle technology, specifically drive technology for environmentally friendly two-wheelers, with two independent drives (hybrid drive).

Conventional two-wheelers have either a pedal crank drive (bicycle), a drive with an internal combustion engine or a combination of both drives (bicycle with auxiliary motor)

Disadvantages of combustion engine drive :

-Noise and pollutant emissions
-high fuel and lubricant consumption
-low efficiency
-low torque
-Speed strongly dependent on load

Disadvantages of pedal crank drive:

-low speed
-short range
-unwanted physical strain

The invention of a bicycle or mountain bike with an electric drive aims to combine the positive properties of both aforementioned drives and to eliminate the disadvantages of both drives as far as possible.

The invention is based on the following problems:

-Individual traffic volume in everyday local transport by passenger cars
-Parking shortage in urban areas

-Noise and pollutant emissions from everyday local transport by passenger cars
-Fuel and lubricant consumption through everyday local transport with passenger cars
-unwanted physical strain when using the bicycle in everyday local transport

The above-mentioned problems can be solved or greatly reduced with the help of the invention if broad sections of the population switch to bicycles or mountain bikes with an electric drive for everyday local transport, which can be expected due to the favorable benefit/cost balance.

Furthermore, the invention represents an ideal combination between a recreational vehicle with health aspects and an environmentally friendly means of everyday local transport.

Advantages achieved with the invention:

-Elimination or minimization of the disadvantages of conventional bicycles
-Decrease in everyday local transport volumes by passenger cars

-Reducing the parking shortage

-Conservation of materials and resources

-Minimization of noise and pollutant emissions

-Health effects when using the invention in everyday local transport

Individual components of the bicycle or mountain bike with an electric drive.

-normal bicycle/mountain bike, with modified front fork and hub mount

-second front wheel with built-in electric drive (43), as change wheel

-Drive accumulator set (35) with quick assembly system

-Control elements (pushbuttons, control electronics)

-polar-independent quick-assembly cable set (47)

-stable welded luggage carrier (40) for battery storage

-Electronic charger for charging the batteries (35) at home

Basic idea and principle of the invention

The bicycle or mountain bike with an electric drive is basically intended as a combination between a conventional bicycle with pedal crank drive and a user-friendly convenience in everyday use, as an environmentally friendly all-purpose two-wheeler.

The basic idea is a hybrid drive for the aforementioned two-wheeler, with a pedal crank drive and a hub or gear shift acting on the rear wheel, as well as an electric drive (43) acting on the front wheel by means of a DC hub gear motor with a generator function.

This DC motor (16) acts as a generator (regenerative braking) when driving downhill and wherever braking is required, which partly recharges the drive accumulator (35) required for the hybrid drive, which means that the accumulator (35) can be dimensioned to save space and weight, and on the other hand minimizes the wear of conventional bicycle brakes (e.g. cantilever brakes) and protects the rims.

Furthermore, a large part of the energy taken from the grid when charging the batteries (35) at home can be saved by the regenerative braking circuit.

The user can therefore move on a level road surface with a conventional pedal crank drive, using the derailleur or hub gears, as with a conventional bicycle, and during strenuous uphill rides, in everyday use (for example, commuting to work, running errands, when physical performance is reduced) can rely on the electric drive (43) in order to conserve physical reserves.

When driving downhill and in "stop-and-go traffic", where braking is necessary, the drive accumulator (35) can partially recover the energy lost during the drive (for example when driving uphill), which also increases the range (action radius).

By using recyclable high-performance batteries (35) with a long service life, the invention is one of the most environmentally friendly means of individual transport in everyday local transport.

Detailed description and functional explanation of the individual components of the invention:

1 Electric motor generator drive (43):

This is an electric machine that already exists in a variety of designs, which, when used in this case, replaces the conventional front wheel hub of a normal bicycle front wheel, whereby shorter spokes are used for installation in the front wheel due to the larger diameter, which further increases the rigidity and stability of the same.

The installation depth or width of this electrical machine corresponds in the application to the width of a normal front wheel hub.

The motor has rigid, specially shaped, preferably oval hollow shaft ends (6) on both sides, which together with the similarly shaped wheel hub mounts (4) in the front wheel fork (1) serve as a rigid connection between the two-wheeler and the electric drive motor (43).

The outer body (7) of the electric drive (43), which rotates when the vehicle is in motion, is connected to the rim of the front wheel by the spokes (or cast rim) and provides the propulsion (outer rotor).

The hollow shaft (8;9) has a central bore, like a conventional hub with a quick-release system (as on a mountain bike).

The wheel hub mounts (4) in the front wheel fork (1) and the hollow shaft ends (6) of the electric drive (43) must be specially hardened to ensure a wear-free connection.

The electric drive (43) acts as a generator by changing the poles during braking (regenerative braking).

By using a DC motor with field tapping, it may also be possible to achieve two different fan speeds with two different torques and power ratings.

The motor front wheel is installed using the conventional quick-fastening toggle screw, like a normal front wheel on a mountain bike.

This means that a normal front wheel can be installed quickly and easily instead of the motor front wheel, for example for leisure and sports rides.

This turns the bicycle or mountain bike with an electric drive into a normal bicycle or mountain bike for leisure and fitness.

If necessary for technical reasons, the electric drive can also be firmly connected to the front wheel fork using spring pins on the motor housing.

2 Ordinary bicycle or mountain bike with modified front fork:

The front wheel fork (1), especially the wheel hub mounts (4) must be adapted to the application.

For this purpose, the wheel hub holder (4) must be shaped in the same way as the hollow shaft ends (6) of the electric drive (43) (oval shape in the example).

Furthermore, the wheel hub mount (4) must be specially hardened like the hollow shaft ends (6) of the electric drive (43).

In this application, the wheel hub mount (4) serves as a rigid connection between the electric drive (43) and the front wheel fork (1) and thus also with the bicycle.

3 Energy supply system for the electric drive (43):

The power supply for the electric drive (43) is provided by two high-performance accumulators (35) that are tailored to the application and are equipped with a quick-mounting system for easy and quick attachment to the luggage carrier (40) designed for the application.

4 Drive and regenerative braking circuit:

This essentially consists of a push button switch for driving operation and a push button switch for generator operation (regenerative braking), preferably combined with the brake lever of the rear wheel brake of the two-wheeler.

These control elements are used to switch the electronic control device (44), which in turn controls the electric drive.

5-pole, non-interchangeable quick-assembly cable set (47):

This complete wiring harness has distinctive plug connectors for connecting the individual components of the bicycle or mountain bike with an electric drive (drive batteries (35), operating elements, electric drive (43), electronic control device (44)).

The cable set is tailored to the application and has retaining clips for easy and quick attachment to the bicycle frame.

6 Luggage carrier (40) for battery storage:

For the safe attachment of the batteries (35) to the bicycle, a stable luggage carrier (40) designed for the application is provided on the bicycle.
Due to the small dimensions of the batteries (35) and their special mounting system, the luggage rack (40) can still be used to carry payloads or to attach saddlebags.

7 electronic charger:

The automatic charger is used to fully charge the batteries (35) at home.

It is electronically regulated and stabilized and switches off automatically when the final charging voltage is reached or switches to trickle charging (battery type specific).

The device is equipped with a charge level indicator and is quick-charging capable.

Concluding remarks on the invention:

When using a DC series motor, its property comes into play that it exceeds its rated speed when the load torque is too low and thus increases the driving speed.

This can be used to increase the speed up to a set speed via the control electronics in order to achieve a higher driving speed on lower gradients or on level ground than at nominal load.

The electronic control device (44) can prevent accidental or improper over-tightening.

The system underlying the invention can be applied to all types of bicycles which must be adapted to the application.

Traffic safety benefits of the invention:

-accelerated crossing of dangerous areas thanks to electric starting assistance -significantly increased braking performance thanks to the additional generator braking -the shortened spokes in the hub motor front wheel also ensure more rigidity and stability of the front wheel

-Additional connections for the two-wheeler lighting enable the use of a much stronger headlight and tail light even when stationary for longer periods of time -The almost noiseless electric drive enables a much better acoustic detection of dangerous moments than with noisy combustion engine drives -Avoidance of back and forth swinging when driving uphill thanks to the electric drive -Traffic calming in everyday local traffic thanks to fewer passenger cars with widespread use of the invention

Legend for an example with the Arabic numbered details in text and drawings:

(1) -Front fork of the bicycle / mountain bike

(2) -flange-shaped spoke holders on the rotor ram

(3) -Holes for spokes

(4) Front fork hub mount

(5) centric bore through the hollow shaft

(6) shaft ends arranged eccentrically on both hollow shaft parts (8;9)

(7) Rotor drum (rotating outer body)

(8) Rotor bearing bush

(9) Hollow shaft

(10) Shim washer DIN 988-14X20X1

(11) Shim washer DIN 988-10X16X1

(12) Shim washer DIN 988-20X28X0.8

(13) Retaining ring DIN 471-20X1,2

(14) Rotor drum bearings (rolling bearings capable of bearing radial and axial loads; dust and watertight)

(15) Rotor gear (externally toothed spur gear; m=l; z=100;d=100mm;b=7mm)

(16) Electric motor (DC series motor; pole-changing; IP 65)

(17) Motor gear (externally toothed spur gear; m=l; z=55; d=55mm; b=7mm)

(18) Connecting gear (externally toothed spur gear; m=l; z=55;d=55mm;b=7mm)

(19) Transmission gear (externally toothed spur gear; m=l; z=10; d=10mm;b= ^r 7mm)

(20) Engagement bearing lever

(21) Bearing bolt

(22) Bearing bolt for engagement bearing lever

(23) Reversing lever for switching drive

(24) Bearing bolt for reversing lever

(25) Fixing bolt for preload spring

(26) Preload spring

(27) Threaded spindle TR8X2

(28) Threaded bush TR8X2 with external teeth like pinion of DC servo motor

(29) brushless DC servo motor

(30) Mounting bracket for switching drive

(31) Timing belt for gearshift drive

(32) Mounting screws for mounting bracket

(33) Motor connector

(34) Battery connector

(35) Accumulators

(36) Locking fasteners

(37) Bearing bolts for locking locks

(38) Fastening bolt for carrying/unlocking strap

(39) Carrying/unlocking strap

(40) Luggage carrier tube frame

(41) Return springs for locking devices

(42) Battery mounting hooks

(43) Electric drive complete with all individual parts

(44) electronic control device

(45) Rolling bearings for connecting and transmission gears

(46) Limit switch for switching drive

(47) Quick assembly cable set

(48) Lock washer DIN 6799-5

FIG. 1 -Side view of the electric drive in the hub mount of the front wheel fork FIG. 2 -Front view of the electric drive in the hub mount of the front wheel fork FIG.3 -Front view of the electric drive (rotor drum shown cut away) FIG.4 -Side view of the switching drive (gearbox unlocked, rotor drum cut away) FIG.5 -Side view of the switching drive (gearbox engaged, rotor drum cut away) FIG.6 -Side view of the electric motor (gear side) FIG.7 -Front view of the electric motor

FIG.8 -Side view of the electric motor (plug side) FIG.9 -Rear view of the quick-release battery fastening (in locked position) FIG. 10-Rear view of the quick-release battery fastening (in unlocked position) FIG. 11 -Top view of the quick-release battery fastening (locked) FIG. 12-Exemplary design in overall view (side view)

Example of implementation - Calculation for dimensioning a prototype

Motor type: DC series motor, pole-changing (for two-quadrant converter or DC chopper drive and regenerative braking in clockwise rotation).

Engine data:

Nominal voltage: Uk = 24V DC

Nominal power: Pn = 800W Short-term maximum power: P _msx = lOOOW

Rated speed: &eegr;&khgr; = 1550min" ¹

Maximum speed: n _m ax = 2400min" ¹

Nominal torque: Ms = 8Nm

Tightening torque: Ma = 15Nm

Other motor properties: -Protection class IP64/65
-electrothermal overload protection -built-in tachogenerator -electronic commutation -continuous operation mode
-Temperature range -30°C...+85°C

Legend for the symbols and indices used:

G = total weight force (user, bicycle, payload) Fg- slope force

vb - Driving speed in drive case

P/nee/? ⁼ mechanical power at Fg and ν β ⁼ effective torque at the wheel = effective torque at the rotor (=

⁼ Torque electric motor n _Wheel = Wheel speed
n.Rot ⁼ rotor speed (=nR _a d) πλ/ω? ⁼ motor speed
i = gear ratio ¹ Z-MOt ⁼ number of teeth on motor gear 'Z.Rot ⁼ number of teeth on rotor gear TRad ⁼ radius of front wheel
η = Motor efficiency
Uw – rated motor voltage Im = rated motor current

T = duty cycle of engine operation Ca = capacity of the accumulators Application case: gradient 20%; G = 1300N; η = 0.8

_ 1300^x2^

10.2m

h = height climbed s = distance travelled

?,„ech= T[XPmZK= 0,SX 1000W= SOOW The rolling resistance and the air resistance are neglected here!

,, _ Pmecb _ 800 W _

vs 3,138&ggr; _ ^ g;n? ' -Of) '

^nRad 2XiOO-KJ 2&khgr;&pgr;&khgr;&Ogr;,3325/&eegr;''" ³ ^* ^ min _ SOOW _

_ O/l

- ⁸⁴ '

= 10 x 10 = 100 M _Mo t = TqX Mr ₀ , = J ₅ x 84,767A^m = 8, 4167Nm

In the application example, the motor must produce a torque of approx. 8.5 Nm. Since the tightening torque is 15 Nm, the motor meets the requirements.

Motor current in application:

T— ^p ™* — JOO(W _ /M 7 &lgr;i-Uot— u _N - 24K -^&iacgr;'&Lgr; Ca = 44Ah

¹ luo,~ 41,7/1 -

This means that in the application example the motor can be used for one hour at a 20% gradient.

However, in practice, it is rare to have to overcome such long inclines and the battery is partially recharged when going downhill and the pedal crank drive can be used on flat terrain, so the operating time is increased many times over.

Application example at maximum load:

G = 1500N ; M _Mot = M _A = 15Nm ; _Ymech = 800 W ; Gradient 30% s= 10.44m ;h = 3m

= 431^

M.Rad = ix MMot = 10x1 5Nm = 15OiVm

Pmech 800 W η 0/(QoJ. _ Cfl Cp 1

min

Vs = 2&khgr;&pgr;&khgr;«&Agr;«/xr^arf = 2 &khgr;&pgr;&khgr; O ₉ 8488ix0,3325w=l,77f = 6,384^

At maximum total weight and 30% gradient, the engine reaches a driving speed of 6.384 km/h.

Speed at rated engine speed:

η a,«/ = Jq x riMot = J ₀ -XnK = 2. 5833j

5.34? = 19.43^

This means that the motor achieves a driving speed of around 20 km/h at rated speed. At lower load torques, for example when driving uphill with a slight gradient or on level ground, the motor exceeds its rated speed due to its design, which can be used to increase the speed up to a specified speed, controlled by an electronic control device.

maximum driving speed:

2x;txO,3325m ~ ^ä ' ^ *

n _m ax = zx n _Radmax = 10 x 239.33-±- = 2393,

mm

Thus, at its specified maximum speed of 2400-^ the engine achieves a

° ° min

Driving speed of 30km/h.

Claims (1)

Enrsiehungsf@rtlg &eegr;» *· *- ■ · ·♦ Redirect received J.... ^: \. ^: *&Tgr; * &Igr;! ^: 5 Patent Attorney * Dr.-lng. Peter Htebliag 10.04.1997 Applicant: Reinhard Wetzel, Albris 1, 88260 Argenbühl PROTECTION CLAIMS 1 Bicycle or mountain bike with an electric drive (43), characterized in that the electric drive (43) is installed in the hub of the front wheel, instead of a conventional hub, and the front wheel is easily replaceable with a conventional quick-release system. 2 Bicycle or mountain bike according to claim 1, characterized in that the electric drive (43) consists essentially of a direct current series motor (16), an automatically switchable transmission, a rotor drum (7) as a rotating outer body, and a two-part hollow shaft (8; 9). 3 Bicycle or mountain bike according to claim 1 or 2, characterized in that the electric motor (16) works as a motor during drive and acts as a generator during braking (regenerative braking). 4 Bicycle or mountain bike according to one of claims 1 to 3, characterized in that the electric motor (16) is designed to be dust and water protected (IP 65) and is equipped with an electronic control device (44) which serves to limit the current and speed in the drive and regenerative braking case. 5 Bicycle or mountain bike according to one of claims 1 to 4, characterized in that the electric motor (16) has a brushless electronic commutation and is thus extremely low-wear. 6 Bicycle or mountain bike according to one of claims 1 to 5, characterized in that the electric motor (16) has a central shaft which forms a rigid unit with the motor housing and the motor stand. 7 Bicycle or mountain bike according to one of claims 1 to 6, characterized in that the rotor of the electric motor (16) is mounted radially rotatably on the rigid shaft and is firmly connected to a motor gear (17). 8 Bicycle or mountain bike according to one of claims 1 to 7, characterized in that the shaft of the electric motor (16) has a centric nut thread M14X1RH and a centric bore with a diameter of 12mmH6 (ISO fit). 9 Bicycle or mountain bike according to one of claims 1 to 8, characterized in that the hollow shaft (9) with its eccentrically arranged and preferably oval shaft end (6) is screwed into the shaft of the motor with the bolt thread M14X1RH and by means of a shim (10) the shaft end (6) is brought into the predetermined position to the reference plane (perpendicular). 10 Bicycle or mountain bike according to one of claims 1 to 9, characterized in that the rotor bearing bush (8) with the nut thread M10X0.75LH is screwed onto the bolt thread M10X0.75LH of the hollow shaft (9) and with a shim (11) the eccentric and preferably oval shaft end (6) of the rotor bearing bush (8) is also brought into the same position to the reference plane as the shaft end (6) of the hollow shaft (9). 11 Bicycle or mountain bike according to one of claims 1 to 10, characterized in that a radially and axially loadable rotor drum bearing (14) is arranged on the rotor bearing bush (8), which is fixed to the rotor bearing bush (8) by means of a shim (12) and a locking ring (13). 12 Bicycle or mountain bike according to one of claims 1 to 11, characterized in that the rotor drum (7) is arranged on the rotor drum bearing (14) so as to be radially rotatable and capable of being loaded both radially and axially. 13 Bicycle or mountain bike according to one of claims 1 to 12, characterized in that the rotor gear (15) is arranged on the inside of the rotor drum (7) and is also mounted radially rotatably on the rotor drum bearing (14), the rotor drum (7) and rotor gear (15) forming a rigid unit. 14 Bicycle or mountain bike according to one of claims 1 to 13, characterized in that the engagement bearing lever (20) is arranged on the housing of the electric motor (16) by a bearing bolt (22) on the gear wheel side so as to be rotatable transversely to the motor axis, which is fixed by a locking disk (48). 15 Bicycle or mountain bike according to one of claims 1 to 14, characterized in that a bearing pin (21) is arranged on the engagement bearing lever (20), on which the connecting gear (18) and the transmission gear (19) are radially rotatable, are arranged on a roller bearing (45), wherein the connecting gear 18 and the transmission gear (19) form a rigid unit. 16 Bicycle or mountain bike according to one of claims 1 to 15, characterized in that the engagement bearing lever (20) in the drive and regenerative braking case (motor and generator operation) moves the axis of rotation of the connecting gear (18) and transmission gear (19) towards the axis of rotation of the motor gear (17) until the axis distance reaches the predetermined dimension so that the motor gear (17) and connecting gear (18) mesh with one another, and the transmission gear (19) and rotor gear (15) mesh with one another, whereby a switchable non-positive connection between the electric motor (16) and the rotor drum (7) is achieved. 17 Bicycle or mountain bike according to one of claims 1 to 16, characterized in that on the housing of the electric motor (16) on the gear side a deflection lever (23) is rotatably arranged on a bearing pin (24), which moves the engagement bearing lever (20) in the drive and regenerative braking case (motor and generator operation) towards the axis of rotation of the motor gear (17). 18 Bicycle or mountain bike according to one of claims 1 to 17, characterized in that a mounting bracket (30) is arranged on the housing of the electric motor (16), in which a threaded spindle (27), a threaded bush (28) with external teeth and a brushless DC servo motor (29) are installed and these represent the switching drive in the drive and regenerative braking case (motor and generator operation). 19 Bicycle or mountain bike according to one of claims 1 to 18, characterized in that in the drive and regenerative braking case (motor and generator operation) the DC servo motor (29) is controlled in a predetermined direction of rotation and this drives the threaded bush (28) via the toothed belt (31) via its external toothing in a predetermined direction of rotation, whereby the threaded spindle (27) is moved in a predetermined direction by a predetermined distance and thereby moves the deflection lever (23) in a predetermined direction via the preload spring (26) and the fastening bolts (25), which in turn moves the engagement bearing lever (20) towards the motor axis until the respective gears engage with one another in a force-fitting manner. 20 Bicycle or mountain bike according to one of claims 1 to 19, characterized in that the switching path of the threaded spindle (27) is limited by two limit switches (for example reed contacts) (46) at both dead centers (by controlling the DC servo motor (29)). 21 Bicycle or mountain bike according to one of claims 1 to 20, characterized in that the threaded spindle (27) moves the deflection lever (23) in the drive and regenerative braking case (motor and generator operation) via the preload spring (26) to its predetermined end position and then preloads the preload spring (26) by a predetermined distance, whereby the necessary contact pressure of the gears is achieved. 22 Bicycle or mountain bike according to one of claims 1 to 21, characterized in that in the pedal crank drive case the DC servo motor (29) is controlled in the opposite direction of rotation after a predetermined time, whereby the threaded spindle (27) is moved in the opposite direction via the threaded bush (28) and in the process moves the deflection lever (23) in the opposite direction after the preload spring (26) has been relaxed, which in turn moves the engagement bearing lever (20) back and thereby separates the connecting gear (18) from the motor gear (17) and the transmission gear (19) from the rotor gear (15), thus avoiding a braking torque by the electric motor (16) and the transmission in the pedal crank drive case (automatic transmission release). 23 Bicycle or mountain bike according to one of claims 1 to 22, characterized in that the specially shaped, eccentrically arranged shaft ends (6) of the hollow shaft (9) and the rotor bearing bush (8) serve for a torsion-free, rigid connection to the uniformly designed wheel hub receptacles (4) in the front wheel fork (1). 24 Bicycle or mountain bike according to one of claims 1 to 23, characterized in that the electric motor (16) and the accumulators (35) are provided with polarity-independent connecting plugs (33; 34) which are intended for simple and rapid installation and removal. 25 Bicycle or mountain bike according to one of claims 1 to 24, characterized in that the rotor drum (7) is provided with two flange-shaped spoke holders (2), in each of which 16 bores (3) are arranged for the 32 spokes of a conventional front wheel. 26 Bicycle or mountain bike according to one of claims 1 to 25, characterized in that the hollow shaft (9) and the rotor bearing bush (8) are provided with a central bore (5) for receiving a conventional quick-release toggle screw. 27 Bicycle or mountain bike according to one of claims 1 to 26, characterized in that the electric motor (16) is preferably operated with a direct voltage of 24VoIt. 28 Bicycle or mountain bike according to one of claims 1 to 27, characterized in that the electric motor (16) is limited in speed to a maximum driving speed of v=30 km/h by the electronic control device (44) in the drive case (motor operation) and the control device (44) in the regenerative braking case (generator operation) enables a continuous braking torque control of the electric motor (16) and in the motor and generator operation has a maximum current limitation in order to protect the electric motor (16) and the drive accumulators (35) from overload. 29 Bicycle or mountain bike according to one of claims 1 to 28, characterized in that the electronic control device (44) has an overcharge protection, either by automatic shutdown at the end of the charging voltage or switching to trickle charging. 30 Bicycle or mountain bike according to one of claims 1 to 29, characterized in that a push button switch for motor operation and a push button switch for generator operation are arranged on the bicycle handlebar. 31 Bicycle or mountain bike according to one of claims 1 to 30, characterized in that at least two accumulators (35) are provided for supplying energy to the electric drive (43), one accumulator (35) being suspended on each side of the luggage carrier tube frame (40) by means of fastening hooks (42) firmly attached to the accumulator housing, at least two fastening hooks (42) being necessary for each accumulator (35) (two double hooks in the drawing). 32 Bicycle or mountain bike according to one of claims 1 to 31, characterized in that the suspension of the accumulators (35) by means of the fastening hooks (42) is locked or secured by at least two locking closures (36) per accumulator (35), which are each rotatably mounted in bearing bolts (37) in the fastening hooks (42). 33 Bicycle or mountain bike according to one of claims 1 to 32, characterized in that the locking fasteners (36) are each connected via a fastening bolt (38) to the carrying/unlocking strap (39), which serves to unlock the battery suspension and to easily remove the batteries (35), wherein the locking takes place automatically, by means of a return spring (41), per locking fastener (36), after the batteries (35) have been suspended on both sides of the upper luggage carrier tube frame (40) and the carrying/unlocking strap (39) has been released. 34 Bicycle or mountain bike according to one of claims 1 to 33, characterized in that the accumulators (35) are each equipped with a quick-release strap with click fasteners arranged on the hook side in the lower third of the accumulators (35) for lateral positioning (without drawing). 35 Bicycle or mountain bike according to one of claims 1 to 34, characterized in that the accumulators (35) which preferably supply a direct voltage of 12 V, are dust and watertight, suitable for all weather conditions and are provided with a recyclable filling, are connected in series in order to provide a supply voltage of 24 V (connected in parallel in the case of 24 V accumulators). 36 Bicycle or mountain bike according to one of claims 1 to 35, characterized in that a quick-assembly cable set (47) for connecting the electric drive (43) to the accumulators (35) and the drive and regenerative brake pushbuttons is arranged on the bicycle frame, which is connected by means of ag* α ami &igr;. /&tgr;«. Qi &rgr;» UD 11 &ogr;. j .: ···· .··.·*·: ··.···: Click clamps, easy and quick to remove, attached to the bicycle frame (without drawing). 37 Bicycle or mountain bike according to one of claims 1 to 36, characterized in that the luggage carrier (40) which is designed to be suitably stable for receiving the batteries (35) can also be used to receive the payload when the batteries (35) are arranged on both sides. 38 Bicycle or mountain bike according to one of claims 1 to 37, characterized in that an electronic charger equipped with a charge level indicator is provided for charging the batteries (35) (without drawing), which operates with automatic switch-off or switch-over to trickle charge (battery type-specific). 39 Bicycle or mountain bike according to one of claims 1 to 38, characterized in that the electronic control device (44) (for example two-quadrant power converter or DC controller) is arranged on the plug side in a housing equipped with a cooling body, preferably on the housing of the electric drive (43).