EP0013664A1 - Leistungsindikator für ein Fahrrad-Ergometer - Google Patents

Leistungsindikator für ein Fahrrad-Ergometer Download PDF

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Publication number
EP0013664A1
EP0013664A1 EP80810007A EP80810007A EP0013664A1 EP 0013664 A1 EP0013664 A1 EP 0013664A1 EP 80810007 A EP80810007 A EP 80810007A EP 80810007 A EP80810007 A EP 80810007A EP 0013664 A1 EP0013664 A1 EP 0013664A1
Authority
EP
European Patent Office
Prior art keywords
drum
disc
rotation
shoe
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80810007A
Other languages
English (en)
French (fr)
Inventor
Paul Terraillon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0013664A1 publication Critical patent/EP0013664A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/012—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters
    • A63B21/015—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters including rotating or oscillating elements rubbing against fixed elements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/40—Interfaces with the user related to strength training; Details thereof
    • A63B21/4041—Interfaces with the user related to strength training; Details thereof characterised by the movements of the interface
    • A63B21/4049—Rotational movement

Definitions

  • the present invention relates to a device indicating the power developed by the user on a crankset physical training apparatus.
  • Such a device looks like a bicycle balanced on the ground.
  • the crankset generally drives by gear a disc or a drum on which is disposed a brake shoe.
  • a brake shoe On which is disposed a brake shoe.
  • the usual devices are generally equipped with a device making it possible to indicate this braking force either on a dial graduated in kp, or on a dial indicating in% the corresponding slope.
  • some devices are equipped with a speed indicator corresponding to that of a real bike, this as a function of the speed of rotation of the drum actuated by the pedal.
  • the subject of the invention is a power indicator device for a crankset physical training apparatus, comprising a drum driven by the crankset and with which cooperates a brake shoe carried by a movable arm mounted to rotate freely around the axis of this drum, a spring being disposed between a point of this arm and a fixed point to act on this arm in the opposite direction to the force driving the shoe by the drum, and means making it possible to vary the braking force exerted by said brake shoe on the drum, the drum thus more or less strongly driving the brake shoe in the direction of its rotation, characterized in that said movable arm carries a disc driven in synchronism with the drum, in that a fixed caster in contact with the surface of the disc is rotated by the rotation of said disc, the speed of rotation of said caster varying on the one hand with the variation in position of said disc surface p ar compared to the wheel and on the other hand with the variation of the speed of rotation of said disc, and in that a transmission means transmits the rotation of said wheel to a t
  • FIG. 1 represents such a crankset physical training apparatus comprising such a power indicator device. It consists of a U-shaped frame 1, one end of which carries a saddle 2 and the other end of a handlebar 3. The whole is arranged on a support 4 keeping the apparatus in balance on the ground.
  • a crankset 5 actuates a drum 6 in the direction of the arrow indicated on which is mounted the brake shoe 7 movable in the direction of rotation of the drum 6.
  • a fixed caster 11 disposed on one of the two holding cheeks 12 is in contact with the disc 10 and thus rotates at a certain speed of rotation. This speed of rotation will be proportional to the power developed by the user of the device and it will be transmitted via a cable 14 to a tachometer 13 graduated in power units.
  • the handlebar 3 comprises a lever 15 making it possible to adjust by means of a cable 16 the braking force exerted by the brake shoe 7 on the drum 6.
  • the brake shoe 7 and its sole 17 in contact with the drum are arranged at the end of the arms 8 in such a way that a greater or lesser pressure can be obtained, therefore a greater or lesser braking force, exerted by said shoe 7 on the drum 6.
  • This is obtained by means of a stirrup 18, one fixed end of which is housed in the opening 19 of the arm 8 and the other movable end slides between two parts 20 fitted for this purpose in the other arm 8.
  • the stirrup 18 is held in the pressure position by means of a spring 21.
  • This spring 21 can be more or less tensioned using an appropriate device actuated by the lever 15, which thus makes it possible to select the braking force exerted by said shoe 7 on said drum 6.
  • the arms 8 connected at their ends by a bridge 22 are movable around the axis 9 of the crankset 5.
  • Figure 4 shows us an example of arrangement of the end of the arms 8 comprising the bridge 22 and the parts 26 for fixing the spring 23, the hole 19 and the parts 20 between which will slide one end of the stirrup 18 .
  • the drum 6 When the drum 6 begins to rotate, it drives the brake shoe 7 with it, until the latter will stabilize in a certain position. This is done as follows: the shoe 7 driven integrally by the drum 6, moves and tightens the spring 23 whose return force increases until the force is large enough to tear the shoe 7 from its integral connection . At this instant the shoe 7 stabilizes in a certain position while the drum 6 continues its rotation. Consequently, the variations in speed of the drum 6 no longer influence the position reached by the shoe.
  • said shoe 7 will stabilize at a position where the force with which the shoe is driven is equal to the restoring force of the spring 23, this driving force being independent of the speed of rotation of the drum 6, but proportional to the coefficient of friction of the sole 17 of the shoe 7 in contact with the drum 6 and of the braking force exerted by said shoe 7.
  • the coefficient of friction is a constant determined once and for all, it is concluded that the displacement of the shoe, that is to say the position of the shoe at a given instant, is directly proportional to the braking force applied by said shoe 7 to the drum 6.
  • Figure 2 shows the shoe in its extreme positions 7 and 7 ', depending on whether the braking force is minimum respectively maximum.
  • the power indicator device must take into account both the speed of rotation of the drum 6 and both the braking force. exerted by the shoe 7 on said drum 6, therefore of the displacement of said shoe 7.
  • a disc 10 rotating in synchronism with the drum 6 is fixed at the opposite end of one of the arms 8.
  • the axis 9 rotated by the crankset 5 transmits this rotation to the drum 6 by gear reduction by means of the wheels. 27 and 28.
  • the disc 10 is actuated by means of a belt 29 winding on the one hand in a groove 30 arranged around the drum 6 near the axis 9 and on the other hand around a second disc 31 integral with disc 10.
  • a caster 11 fixed to a cheek 12 is in contact with the disc 10 and rotates at a speed which depends on the one hand on the position of the disc 10 and on the other hand on the speed of rotation of said disc 10.
  • the variation in the speed of rotation of the caster 11 when the speed of rotation of the disc is constant corresponds to a variation in the position of the disc 10, therefore to a variation in the position of the shoe 7 and therefore to a variation in the force of braking applied.
  • the speed of rotation of the caster 11 is therefore proportional to the position of the disc 10 corresponding to the braking force applied to the drum 6 and to the speed of rotation of the disc 10 corresponding to the speed of rotation of the drum 6.
  • the speed of rotation of the caster thus corresponds to the power developed by a user of the device for turning the drum 6 braked by the shoe 7 using the pedal set 5.
  • This rotation of the caster 11 is transmitted to the tachometer 13 graduated in power units by means of a cable 14.
  • This device will indicate the instantaneous power with the precision necessary for such crankset physical training apparatus, this by an appropriate dimensioning of its essential elements, in particular the diameters of the disks 10, 11, 29 and the springs 23, 21 and by the choice the coefficient of friction of the sole 17 in contact with the drum 6.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Braking Arrangements (AREA)
  • Earth Drilling (AREA)
EP80810007A 1979-01-12 1980-01-09 Leistungsindikator für ein Fahrrad-Ergometer Withdrawn EP0013664A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH335/79 1979-01-12
CH33579 1979-01-12

Publications (1)

Publication Number Publication Date
EP0013664A1 true EP0013664A1 (de) 1980-07-23

Family

ID=4184668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810007A Withdrawn EP0013664A1 (de) 1979-01-12 1980-01-09 Leistungsindikator für ein Fahrrad-Ergometer

Country Status (3)

Country Link
EP (1) EP0013664A1 (de)
ES (1) ES487640A1 (de)
WO (1) WO1980001452A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058718A1 (de) * 1980-08-29 1982-09-01 Medicor Muevek Belastungsgerät für physiologische untersuchungen.
US4625551A (en) * 1984-06-28 1986-12-02 Teodoro Carnielli Device for detecting the developed power in home pedalling apparatus for bicycles
US4713567A (en) * 1985-10-02 1987-12-15 Fichtel & Sachs Ag Electromagnetic brake device for a sports training apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917377A (en) * 1989-06-28 1990-04-17 Chen Chih S Exercise bicycle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192772A (en) * 1961-10-25 1965-07-06 Peter H Tarter Work-calibrated exercising apparatus
FR2160230A5 (de) * 1971-11-11 1973-06-22 Monark Crescent Ab
DE2252491A1 (de) * 1972-10-26 1974-05-02 Georg Nietsch Fahrradergometer
FR2218561A1 (de) * 1973-02-21 1974-09-13 Sorlin Roger
DE2525739A1 (de) * 1975-06-10 1976-12-23 Resch Fa Willi Ergometer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192772A (en) * 1961-10-25 1965-07-06 Peter H Tarter Work-calibrated exercising apparatus
FR2160230A5 (de) * 1971-11-11 1973-06-22 Monark Crescent Ab
DE2252491A1 (de) * 1972-10-26 1974-05-02 Georg Nietsch Fahrradergometer
FR2218561A1 (de) * 1973-02-21 1974-09-13 Sorlin Roger
DE2525739A1 (de) * 1975-06-10 1976-12-23 Resch Fa Willi Ergometer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058718A1 (de) * 1980-08-29 1982-09-01 Medicor Muevek Belastungsgerät für physiologische untersuchungen.
EP0058718A4 (de) * 1980-08-29 1984-02-09 Medicor Muevek Belastungsgerät für physiologische untersuchungen.
US4625551A (en) * 1984-06-28 1986-12-02 Teodoro Carnielli Device for detecting the developed power in home pedalling apparatus for bicycles
US4713567A (en) * 1985-10-02 1987-12-15 Fichtel & Sachs Ag Electromagnetic brake device for a sports training apparatus

Also Published As

Publication number Publication date
WO1980001452A1 (en) 1980-07-24
ES487640A1 (es) 1980-08-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810502