Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
  • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
  • B62M6/40—Rider propelled cycles with auxiliary electric motor
  • B62M6/55—Rider propelled cycles with auxiliary electric motor power-driven at crank shafts parts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
  • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
  • B62J45/40—Sensor arrangements; Mounting thereof
  • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
  • B62J45/411—Torque sensors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
  • B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
  • B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
  • B62M25/04—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers hand actuated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
  • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
  • B62M6/40—Rider propelled cycles with auxiliary electric motor
  • B62M6/45—Control or actuating devices therefor

Definitions

• the invention relates a method and device for shifting gears on an electric bicycle with a power-assist or main electric motor whose power is transferred to a chainwheel then through a chain to the driven wheel.
• a bicycle fitted with a power-assist or main electrical drive system uses electrical power either directly in the hub of the driven wheel or is equipped with a central electric drive which is set up so that its power is transferred through a chainwheel to the driven wheel.
• Systems with ' a central electric drive have the advantage over hub drive systems in that they make better use of energy, which is very important for electric bicycles with a limited driving range.
• Bicycles with a central electric drive are prevented from further expansion due to technical problems associated with the transfer of torque from the chainwheel to the driven wheel when gears are shifted using a hand-operated, electric, or hydraulic derailleur.
• the formulation of the task is resolved by the creation of a method and device for shifting gears on an electric bicycle according to the present invention.
• the electrical signal is fed to the electronic control unit to operate the electric motor, this unit switches off the electric motor during gear shifting, or reduces its power.
• the suitable use of the electronic control unit is for operating a three-phase electric motor connected to a power supply, suitable software and hardware can also be used to control the switch-off of the electric motor or reduction of its power, respectively its torque during gear shifting.
• the electronic control unit is a device known to these skilled in the art and is resolved in the usual manner, and its integration is not the subject of the present invention.
• the electronic control unit uses a programmable timer to switch off the electric motor or reduce its power at a previously configured time interval, during which gear shifting takes place.
• the subject-matter of the present invention is also a device for shifting gears on a bicycle equipped with a power-assisted or main electric motor that drives the chainwheel, which includes at least one chain-driving sprocket, where the chainwheel is alternately or simultaneously powered via a bottom bracket axle fitted with crank arms and pedals, where the chainwheel is connected via a chain to the driven wheel with a sprocket that includes at least one chain-driven sprocket, while .. the device includes the front derailleur shifter using an inner cable to control the front derailleur of the chainwheel and/or a rear derailleur shifter which uses an inner cable to control the derailleur of a freewheel or an internal geared hub in the hub of the driven wheel.
• the device serves for carrying out the method according to the present invention, i.e. to enable gear shifting with the front or rear derailleur during reduced load on the chain and other parts of the gear shifting system.
• the electrical signal output of the motion sensor is connected to the electronic control unit which controls the electric motor; the unit is connected with the electric motor to switch it off or to reduce its power during gear shifting.
• the electrical signal output of the motion sensor is modified to detect the motion of the derailleur shifter or inner cable connected in both directions to the electronic control unit, which is equipped with a programmable timer that can switch off or reduce the power of the electric motor to a previously configured time interval during gear shifting, and for increasing the torque value, or for reactivating the transfer of the torque from the electric motor to the chainwheel after gear shifting is completed. Lightened shifting can be executed during the configured time interval.
• the motion sensor is formed by a cylindrical housing through which the inner cable passes and which is equipped with an internal optical sensor to detect the motion of the inner cable.
• the device includes a pedalling torque sensor, the output signal of which is connected to the electronic control unit.
• the control unit is programmed to evaluate the pedalling torque. If the pedalling torque shows a low value, the motor power is decreased, whereas a high torque value results in the disconnection of the electric drive.
• the method and device for shifting gears on a bicycle according to the invention primarily enable manufacturers of power-assisted electric bicycles to use multi-row chainwheels, thus offering bicycles with a wider range of gears.
• the method and device for shifting gears according to the invention also increase the reliability, life span, and operational safety of all shifting mechanisms used on power- assisted electric bicycles by fundamentally reducing the stress on the systems by disconnecting the drive during the gear shifting process. There is also a reduction in the risk of accidents caused by blocked chains or by other mechanical defects associated with the transfer of power.
• Fig. 1 depicts a side view of a power-assisted electric bicycle with central motor fitted with a three-row chainwheel and multi-row sprocket, where the motion sensor detects the movement of the inner cables leading from the derailleur shifters to the front and rear deraille.
• Fig. 2 depicts an overhead view with partial cross-section of the bicycle as per Fig. 1.
• Fig. 3 depicts a block schemata of the electrical connection of the bicycle drive as per Fig. 1.
• Fig. 4 depicts a schematic cross-section of a sample motion sensor of the bicycle.
• Fig. 1 depicts a side view of a power-assisted electric bicycle with central motor fitted with a three-row chainwheel and multi-row sprocket, where the motion sensor detects the movement of the inner cables leading from the derailleur shifters to the front and rear deraille.
• Fig. 2 depicts an overhead view with partial cross-section of the bicycle as per Fig. 1.
• Fig. 3 depicts a
• FIG. 5 depicts a side view of a power-assisted electric bicycle with central motor fitted with a single-row chainwheel and internal geared hub in the hub of the driven wheel, where the motion sensor detects the motion of the inner cable leading from the derailleur shifter to the internal geared hub.
• Fig. 6 shows an overhead view with partial cross- section of the bicycle as per Fig. 5.
• Fig. 7 depicts a block schemata of the electrical connection of the bicycle drive as per Fig. 5.
• Fig. 8 depicts a side view of a power-assisted electric bicycle with central motor fitted with a three-row chainwheel and multi-row sprocket, and with an added pedalling torque sensor.
• Fig. 9 depicts an overhead view with partial cross-section of the bicycle as per Fig. 8.
• Fig. 10 depicts a block schema of the electrical connection of bicycle drive as per Fig. 8.
• the power-assisted electric bicycle 1 is fitted with a three-row chainwheel 3 with chain-driving sprockets 4 and a multi-row sprocket 1_0 with driven sprockets 11.
• the handlebars of the bicycle 1 are fitted with a front derailleur shifter 12 which uses an inner cable 13 to control the front derailleur 14 of the chainwheel 3.
• the handlebars of the bicycle 1 are also fitted with a rear derailleur shifter 15 which uses an inner cable 16 to control the rear derailleur 17 of the sprocket 10 on the driven wheel 9.
• the motion sensors 22, 23 may be technically executed using another embodiments known by experts, e.g. using a Hall effect sensor and magnets stored in the derailleur shifter formed by a grip shifter with the use of photocells, infrared or laser beams, or another similar design suitable for detecting the movement of the inner cables 13, 16 with electrical signal output.
• the signal of the optical sensor 25 runs to the electronic control unit 20 , which interrupts or limits the supply of electricity from the power supply 19 to the electric motor 2 at the moment that the inner cable 13 or 16 moves.
• the motion sensor 22 or 23 is deactivated based on the signal provided by the optical sensor 25_, and the supply of electricity into the motor 2 is renewed.
• the bicycle l ⁇ is driven solely by the power provided by the rider, or by drive power with a reduced degree of support from the electric motor 2.
• the rear derailleur shifter 15 is fitted with a motion sensor 22 which consists of one of the technical features described in the first embodiment of the invention, e.g. with an optical sensor 25 as per Fig. 4.
• the optical sensor 25 activates the motion sensor 22 connected to. the electronic control unit 20 of the electric motor 2.
• the control unit 20 interrupts or limits the thrust of the motor 2.
• the period of interruption is programmed to 1 second. After the programmed time period has expired, the thrust of the motor 2 is resumed.
• This embodiment is intended for all types of bicycles 1 with power-assisted electric drive or with electrically-supplied main drive, primarily city, travel, or folding bicycles.
• the power-assisted electric bicycle 1 is equipped with a three-row chainwheel 3 and multi-row sprocket 10 like in the first example.
• the handlebars of the bicycle 1 hold the front derailleur shifter 12 which uses the inner cable 13 to control the front derailleur 14 of the chainwheel 3.
• the handlebars of the bicycle 1 also hold the rear derailleur shifter 15 which uses the inner cable 16 to control the rear derailleur 1_7 of the sprocket 1_0 on the driven wheel 9.
• the front and rear derailleur 1_2, 15 may be designed as lever shifters, twist grip shifters, or another technical feature.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Automatic Cycles, And Cycles In General (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=47789923

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (7)

Citations (5)

Family Cites Families (4)

• 2013
  • 2013-01-29 WO PCT/CZ2013/000006 patent/WO2014059953A1/en active Application Filing
  • 2013-01-29 EP EP13707263.3A patent/EP2739523A1/de not_active Withdrawn

Patent Citations (6)

Non-Patent Citations (1)

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