EP1584355B1 - Training device - Google Patents

Training device Download PDF

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Publication number
EP1584355B1
EP1584355B1 EP05006695A EP05006695A EP1584355B1 EP 1584355 B1 EP1584355 B1 EP 1584355B1 EP 05006695 A EP05006695 A EP 05006695A EP 05006695 A EP05006695 A EP 05006695A EP 1584355 B1 EP1584355 B1 EP 1584355B1
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EP
European Patent Office
Prior art keywords
generating device
torque generating
transmission shaft
exercise
frame
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.)
Not-in-force
Application number
EP05006695A
Other languages
German (de)
French (fr)
Other versions
EP1584355A2 (en
EP1584355A3 (en
Inventor
Miehlich Dieter
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.)
Milon Industries GmbH
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Milon Industries GmbH
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Publication date
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Publication of EP1584355A2 publication Critical patent/EP1584355A2/en
Publication of EP1584355A3 publication Critical patent/EP1584355A3/en
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Publication of EP1584355B1 publication Critical patent/EP1584355B1/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00—Exercising apparatus specially adapted for particular parts of the body
    • A63B23/035—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously
    • A63B23/12—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for upper limbs or related muscles, e.g. chest, upper back or shoulder muscles
    • 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
    • A63B21/005—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters
    • A63B21/0058—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters using motors
    • 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
    • A63B21/4047—Pivoting movement
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/50—Force related parameters
    • A63B2220/54—Torque

Definitions

  • the invention relates to a training device, in particular a strength training device, with a rotatably mounted on a device frame transmission shaft which cooperates on the one hand with a recorded on the device frame torque generating device and on the other hand with a detectable by a trainee exerciser, and with a the effective moment on the exercise organ measuring device (force measuring element ).
  • a training device of this kind is from the DE 35 41 501 C2 known.
  • the mounted on the device frame transmission shaft is connected via a chain with a trained as a sprocket connection member of the torque generating device having an engine mounted on the frame and a drive connected via a clutch to the engine transmission, regardless of the engine also on the device frame is attached.
  • a force measuring element is installed, which acts in the known arrangement as an actual value pickup of a motor associated control loop.
  • the built-in force measuring element is inevitably subject to high stress and is therefore subject to high wear, so that disturbances are to be feared.
  • there is a risk that the forces measured by the measuring element integrated in the chain will be falsified by disturbances, which may lead to incorrect measurement results.
  • the EP 08 53 961 A1 shows a training device in which the torque generating device is designed as a cohesive housing assembly having geared motor whose connecting member interacts directly with the transmission shaft. A force measuring element for determining the effective moment on the training organ is not provided here.
  • the torque generating device is formed as a contiguous housing assembly comprising unit which is rotationally received with a drivable connecting member on the rotatably mounted on the device frame transmission shaft and pivotally suspended therefrom on the device frame and a force measuring element containing a support means is supported against rotation on the device frame.
  • the measuring element is not located here in a movable component, but is integrated in a rigid torque arm, which ensures high reliability and accuracy despite its simple design.
  • the arrangement of the measuring element according to the invention ensures that already very small deviations of the actual value from a predetermined target value are detected, which not only allows a very precise control of the torque generating device, but also the determination of finer, local muscle weaknesses or already minor muscle strengthening.
  • the structural unit forming the torque-generating device can advantageously be arranged in a stable pendulum position. This relieves the load cell of the torque arm, which has an advantageous effect on the achievable accuracy.
  • a further advantageous measure may consist in that the structural unit forming the torque-generating device is mounted in a flying manner on the device frame via the transmission shaft. This results in a very compact design and easy mounting option.
  • the maximum rotation angle of the transmission shaft may be expediently limited by a stop device. This facilitates the control of the torque generating device.
  • the force measuring element integrated into the supporting device forming the torque-generating device can contain a strain gauge (DMS).
  • DMS strain gauge
  • Such a force-measuring element is advantageously very compact and robust. Another advantage is that such a force measuring element electrical output signals generated, which facilitates the further processing of these signals in an electronic computing device, etc.
  • the force-measuring element is arranged in the region of the end remote from the transmission shaft of the assembly which forms the torque-generating device. This results in a large force arm associated lever arm and thus a large power transmission, which improves the accuracy.
  • That the Figures 1 and 2 underlying strength training device includes a functioning as an exercise organ crank 1, which is reciprocally movable.
  • the crank 1 is detected by the person practicing and moved in an active training phase by overcoming an acting on her counter torque and held or braked in the passive training phase against the action of a torque driving them. These may be train movements and / or push movements.
  • the device-side acting on the crank 1 torque is generated by means of a torque generating device, which is designed as a geared motor with an electric motor 2 and a reduction gear 3.
  • the housing of the electric motor 2 is flanged to the housing of the reduction gear 3, so that the gear motor forming the torque generating device forms a unit 4 with a coherent housing arrangement.
  • the electric motor 2 can be switched to achieve a reversal of motion.
  • the torque-generating device and the crank 1 are drivingly connected to each other by a transmission shaft 5.
  • the transmission shaft 5 is rotatably mounted on a device frame 6 and carries on the one hand the crank 1 and on the other hand, the torque generating device forming unit 4.
  • the transmission shaft 5 passes through a frame side provided bearing bushing 7 and is rotatably mounted in this.
  • This storage is expediently designed as a ball bearing, which is particularly low in resistance in an advantageous manner, which counteracts distortions of the result of a torque measurement.
  • a double ball bearing with two arranged at the ends of the bearing bush 7 ball bearings 25 is provided.
  • the bearing bush 7 is fixed to a frame-side cross member 8, which is mounted on the outside of two frame-side stanchions.
  • crank 1 bearing sleeve 9 On the opposite side of the bearing bush 7 outwardly projecting end portion of the transmission shaft 5 a crank 1 bearing sleeve 9 is received. On the opposite side of the bearing bush 7 inwardly projecting portion of the transmission shaft 5, the torque generating device forming unit 4 is added. This is provided with an element of the gear train of the reduction gear 3 forming connecting member 10 which is plugged onto the inner portion of the transmission shaft 5 and rotatably cooperates with this.
  • the connecting member 10 is through in FIG. 1 indicated bearings 26 rotatably mounted in the housing of the transmission 3 of the assembly 4.
  • a gear 11 is provided with a hub 12, in which the transmission shaft 5 engages, which is rotationally connected thereto.
  • a key 13 is provided for this purpose.
  • the assembly 4 and on the other hand, the crank 1 bearing, rotatably mounted in the bearing bush 7 transmission shaft 5 results in practically a flying, frame-side mounting of the assembly 4 and the crank. 1
  • the cooperating by means of the rotatably cooperating with the connecting member 10 of the torque generating device 5 transmitting shaft 5 about the axis pivotally mounted on the device frame 6 assembly 4 is supported by a support means 14 in both directions against rotation on the device frame 6.
  • a linkage is provided.
  • the support means 14 includes a two-legged bracket 15 which is fixed with one leg to the housing assembly of the assembly 4 and the other leg flanking the electric motor 2 and hinged at its free end to a force transducer 16, on the other hand to an adjacent stand post 17 of the equipment rack 6 is articulated.
  • the bracket 15 results in a comparatively large distance of the force measuring element 16 from the axis of rotation of the transmission shaft 5 formed axis of rotation of the assembly 4 and thus a comparatively large lever arm.
  • the housing of the reduction gear 3 offers good opportunities for attaching the bracket 15. This is therefore To relieve the load cell 16, the assembly 4 in a stable pendulum position, ie equilibrium position, supported by the support means 14 on the device frame 6, so that with unloaded crank 1 and the force measuring element 16 is unloaded.
  • the crank 1 is reciprocated by the exercise person or the motor in the direction of rotation.
  • the maximum swing angle is limited.
  • the connecting member 10 by cross transmission shaft 5 is provided at its the housing of the reduction gear 3 superior, crank-remote end portion formed by a patch cam, radial projection 18 which cooperates with an attached to the housing of the reduction gear 3, fixed counter-stop 19.
  • the force measuring element 16 measures a force which, taking into account the distance from the axis of the transmission shaft 5 which acts as the axis of rotation of the structural unit 4, results in a moment which in practice represents the reaction torque to the torque acting on the crank 1 connected to the transmission shaft 5.
  • the force measuring element 16 is therefore expediently designed so that it responds in each direction of force. Since the distance of the force measuring element 16 from the axis of rotation is structurally predetermined, the measured values taken by the measuring element 16 represent directly proportional values at the moment.
  • the output of the measuring element 16 is connected via a signal line 20 to an electronic calculating device 21, which stores the measured values in FIG the desired Way processed.
  • the signal transmission between force measuring element 16 and computing device 20 is advantageously carried out by electrical means.
  • the force measuring element 16 therefore advantageously contains a strain gauge (DMS), which generates direct electrical signals, so that a conversion can be omitted.
  • DMS strain gauge
  • the force measuring element 16 practically forms one of the computing device 20 associated actual value pickup.
  • the computing device 20 may be e.g. act as a controller of the electric motor 2 associated control loop.
  • weight training devices here present type but there is often the desire to take during the entire exercise time of a person exercising the effective torque on the crank 1, for example, determine certain weaknesses of the person exercising or training successes to document etc ..
  • the Computing device 20 may be associated with an indicated in the example shown display device 22 in the form of a screen or the like.
  • a force curve 23 recorded during an exercise cycle that is to say, for example, during an active movement, is shown, which has an irregularity indicated at 24, for example due to a weakness of a specific muscle of the exercise person. This information makes it possible to adjust the training to a targeted strengthening of the weakened muscle. By storing the recorded values over a longer period of time, the training success indicated by a broken line can also be documented.
  • the electric motor 2 can be designed as a directly controllable motor. It would also be possible, the electric motor 2 in the Unit 4 integrated, adjustable friction clutch, for example in the form of an eddy current coupling to assign and to regulate this function of the measured values of the force measuring element 16.
  • the electric motor may be formed as a three-phase motor, which is associated with a frequency converter, by means of which the frequency and the strength of the electric motor supplied three-phase current are adjustable, the current is adjustable at least in dependence on the desired torque and wherein the Frequency is adjustable so that the rotational speed of the rotating field of the three-phase current supplied to the electric motor deviates from the actual rotational speed of the electric motor which can be calculated from the measured values of a position-measuring device assigned to the output of the torque-generating device by a predetermined slip speed.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rehabilitation Tools (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

The esp. power trainer has a frame (6) with a rotating transmission shaft (5), which acts with a torque generator (3) and a training unit (1), and a measuring device for the momentum acting on the unit. The torque generator is a modular unit (4) containing a housing arrangement. The module is held on the transmission shaft via a driven connection part (10), and is suspended pivoted on the frame. It is also supported on the frame non-turnable in both directions via a support unit (14) containing a power measuring device (16). The output of this is connected via a signal line (20) to a computer (21) with indicator (22).

Description

Die Erfindung betrifft ein Trainingsgerät, insbesondere ein Krafttrainingsgerät, mit einer auf einem Gerätegestell drehbar gelagerten Übertragungswelle die einerseits mit einer auf dem Gerätegestell aufgenommenen Drehmomenterzeugungseinrichtung und andererseits mit einem von einer Trainingsperson erfassbaren Übungsorgan zusammenwirkt, und mit einer das am Übungsorgan wirksame Moment erfassenden Messeinrichtung (Kraftmessglied).The invention relates to a training device, in particular a strength training device, with a rotatably mounted on a device frame transmission shaft which cooperates on the one hand with a recorded on the device frame torque generating device and on the other hand with a detectable by a trainee exerciser, and with a the effective moment on the exercise organ measuring device (force measuring element ).

Ein Trainingsgerät dieser Art ist aus der DE 35 41 501 C2 bekannt. Bei dieser bekannten Anordnung ist die auf dem Gerätegestell gelagerte Übertragungswelle über eine Kette mit einem als Kettenrad ausgebildeten Anschlussorgan der Drehmomenterzeugungseinrichtung verbunden, die einen auf dem Gerätegestell befestigten Motor und ein antriebsmäßig über eine Kupplung mit dem Motor verbundenes Getriebe aufweist, das unabhängig vom Motor ebenfalls auf dem Gerätegestell befestigt ist. In die Kette ist ein Kraftmessglied eingebaut, das bei der bekannten Anordnung als Ist-Wert-Aufnehmer eines dem Motor zugeordneten Regelkreises fungiert. Das in die Kette eingebaute Kraftmessglied unterliegt zwangsläufig einer hohen Beanspruchung und ist daher einem hohen Verschleiß unterworfen, so dass Störungen zu befürchten sind. Außerdem besteht die Gefahr, dass die von dem in die Kette integrierten Messglied gemessenen Kräfte durch Störgrößen verfälscht werden, was zu unrichtigen Messergebnissen führen kann.A training device of this kind is from the DE 35 41 501 C2 known. In this known arrangement, the mounted on the device frame transmission shaft is connected via a chain with a trained as a sprocket connection member of the torque generating device having an engine mounted on the frame and a drive connected via a clutch to the engine transmission, regardless of the engine also on the device frame is attached. In the chain, a force measuring element is installed, which acts in the known arrangement as an actual value pickup of a motor associated control loop. The built-in force measuring element is inevitably subject to high stress and is therefore subject to high wear, so that disturbances are to be feared. In addition, there is a risk that the forces measured by the measuring element integrated in the chain will be falsified by disturbances, which may lead to incorrect measurement results.

Die EP 08 53 961 A1 zeigt ein Trainingsgerät, bei dem die Drehmomenterzeugungseinrichtung als eine zusammenhängende Gehäuseanordnung aufweisender Getriebemotor ausgebildet ist, dessen Anschlussorgan direkt mit der Übertragungswelle zusammenwirkt. Ein Kraftmessglied zur Bestimmung des am Übungsorgan wirksamen Moments ist hier nicht vorgesehen.The EP 08 53 961 A1 shows a training device in which the torque generating device is designed as a cohesive housing assembly having geared motor whose connecting member interacts directly with the transmission shaft. A force measuring element for determining the effective moment on the training organ is not provided here.

Hiervon ausgehend ist es die Aufgabe der vorliegenden Erfindung, ein Trainingsgerät eingangs erwähnter Art mit einfachen und kostengünstigen Mitteln so zu verbessern, dass eine hohe Genauigkeit und Störungsfreiheit der Messeinrichtung erreicht werden.On this basis, it is the object of the present invention to improve a training device of the type mentioned with simple and inexpensive means so that a high accuracy and freedom from interference of the measuring device can be achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Drehmomenterzeugungseinrichtung als eine zusammenhängende Gehäuseanordnung aufweisende Baueinheit ausgebildet ist, die mit einem antreibbaren Anschlussorgan drehschlüssig auf der auf dem Gerätegestell drehbar gelagerten Übertragungswelle aufgenommen und hierüber schwenkbar auf dem Gerätegestell aufgehängt ist und die über eine ein Kraftmessglied enthaltende Stützeinrichtung verdrehsicher am Gerätegestell abgestützt ist.This object is achieved in that the torque generating device is formed as a contiguous housing assembly comprising unit which is rotationally received with a drivable connecting member on the rotatably mounted on the device frame transmission shaft and pivotally suspended therefrom on the device frame and a force measuring element containing a support means is supported against rotation on the device frame.

Das Messglied befindet sich hier nicht in einem beweglichen Bauteil, sondern ist in eine starre Drehmomentstütze integriert, was trotz einfacher Bauweise eine hohe Zuverlässigkeit und Exaktheit gewährleistet. Die erfindungsgemäße Anordnung des Messglieds stellt sicher, dass bereits sehr geringe Abweichungen des Ist-Werts von einem vorgegebenen Soll-Wert festgestellt werden, was nicht nur eine sehr exakte Regelung der Drehmomenterzeugungseinrichtung ermöglicht, sondern auch die Feststellung feinerer, lokaler Muskelschwächen bzw. bereits geringfügiger Muskelstärkungen.The measuring element is not located here in a movable component, but is integrated in a rigid torque arm, which ensures high reliability and accuracy despite its simple design. The arrangement of the measuring element according to the invention ensures that already very small deviations of the actual value from a predetermined target value are detected, which not only allows a very precise control of the torque generating device, but also the determination of finer, local muscle weaknesses or already minor muscle strengthening.

Vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den Unteransprüchen angegeben. So kann die die Drehmomenterzeugungseinrichtung bildende Baueinheit vorteilhaft in einer stabilen Pendellage angeordnet sein. Dies entlastet das Kraftmessglied der Drehmomentstütze, was sich vorteilhaft auf die erzielbare Genauigkeit auswirkt.Advantageous embodiments and expedient developments of the higher-level measures are specified in the subclaims. Thus, the structural unit forming the torque-generating device can advantageously be arranged in a stable pendulum position. This relieves the load cell of the torque arm, which has an advantageous effect on the achievable accuracy.

Eine weitere vorteilhafte Maßnahme kann darin bestehen, dass die die Drehmomenterzeugungseinrichtung bildende Baueinheit über die Übertragungswelle fliegend auf dem Gerätegestell gelagert ist. Dies ergibt eine sehr kompakte Bauweise sowie eine einfache Montagemöglichkeit.A further advantageous measure may consist in that the structural unit forming the torque-generating device is mounted in a flying manner on the device frame via the transmission shaft. This results in a very compact design and easy mounting option.

Da die Übungsbewegung eine hin- und hergehende Bewegung ist, kann der maximale Drehwinkel der Übertragungswelle zweckmäßig durch eine Anschlageinrichtung begrenzt sein. Dies erleichtert die Steuerung der Drehmomenterzeugungseinrichtung.Since the exercise movement is a reciprocating movement, the maximum rotation angle of the transmission shaft may be expediently limited by a stop device. This facilitates the control of the torque generating device.

Gemäß einer bevorzugten Ausgestaltung kann das in die der die Drehmomenterzeugungseinrichtung bildenden Baueinheit zugeordnete Stützeinrichtung integrierte Kraftmessglied einen Dehnungsmesstreifen (DMS) enthalten. Ein derartiges Kraftmessglied ist in vorteilhafter Weise sehr kompakt und robust. Ein weiterer Vorteil besteht darin, dass ein derartiges Kraftmessglied elektrische Ausgangssignale erzeugt, was die weitere Verarbeitung dieser Signale in einer elektronischen Recheneinrichtung etc. erleichtert.According to a preferred refinement, the force measuring element integrated into the supporting device forming the torque-generating device can contain a strain gauge (DMS). Such a force-measuring element is advantageously very compact and robust. Another advantage is that such a force measuring element electrical output signals generated, which facilitates the further processing of these signals in an electronic computing device, etc.

Zweckmäßig ist das Kraftmessglied im Bereich des von der Übertragungswelle entfernten Endes der die Drehmomenterzeugungseinrichtung bildenden Baueinheit angeordnet. Dies ergibt einen großen dem Kraftmessglied zugeordneten Hebelarm und damit eine große Kraftübersetzung, was die Genauigkeit verbessert.Suitably, the force-measuring element is arranged in the region of the end remote from the transmission shaft of the assembly which forms the torque-generating device. This results in a large force arm associated lever arm and thus a large power transmission, which improves the accuracy.

Weitere vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den restlichen Unteransprüchen angegeben und aus der nachstehenden Beispielsbeschreibung anhand der Zeichnung näher entnehmbar.Further advantageous embodiments and expedient developments of the parent measures are specified in the remaining subclaims and from the following description of the example with reference to the drawing closer.

In der nachstehend beschriebenen Zeichnung zeigen:

Figur 1
eine Teilansicht eines erfindungsgemäßen Kraftrainingsgeräts teilweise im Schnitt und
Figur 2
eine Seitenansicht der Anordnung gemäß Figur 1 mit außerhalb des Gerätegestells geschnittener Übertragungswelle.
In the drawing described below:
FIG. 1
a partial view of a force training device according to the invention partially in section and
FIG. 2
a side view of the arrangement according to FIG. 1 with cut outside of the equipment rack transmission shaft.

Das den Figuren 1 und 2 zugrundeliegende Krafttrainingsgerät enthält eine als Übungsorgan fungierende Kurbel 1, die hin- und hergehend bewegbar ist. Die Kurbel 1 wird von der Übungsperson erfasst und in einer aktiven Übungsphase unter Überwindung eines an ihr angreifenden Gegendrehmoments bewegt und in der passiven Übungsphase entgegen der Wirkung eines sie antreibenden Drehmoments gehalten bzw. abgebremst. Dabei kann es sich um Zugbewegungen und/oder Schubbewegungen handeln. Das geräteseitig an der Kurbel 1 angreifende Drehmoment wird mittels einer Drehmomenterzeugungseinrichtung erzeugt, die als Getriebemotor mit einem Elektromotor 2 und einem Untersetzungsgetriebe 3 ausgebildet ist. Das Gehäuse des Elektromotors 2 ist an das Gehäuse des Untersetzungsgetriebes 3 angeflanscht, so dass der die Drehmomenterzeugungseinrichtung bildende Getriebemotor eine Baueinheit 4 mit zusammenhängender Gehäuseanordnung bildet. Der Elektromotor 2 kann zur Erzielung einer Bewegungsumkehr umschaltbar sein.That the Figures 1 and 2 underlying strength training device includes a functioning as an exercise organ crank 1, which is reciprocally movable. The crank 1 is detected by the person practicing and moved in an active training phase by overcoming an acting on her counter torque and held or braked in the passive training phase against the action of a torque driving them. These may be train movements and / or push movements. The device-side acting on the crank 1 torque is generated by means of a torque generating device, which is designed as a geared motor with an electric motor 2 and a reduction gear 3. The housing of the electric motor 2 is flanged to the housing of the reduction gear 3, so that the gear motor forming the torque generating device forms a unit 4 with a coherent housing arrangement. The electric motor 2 can be switched to achieve a reversal of motion.

Die Drehmomenterzeugungseinrichtung und die Kurbel 1 sind durch eine Übertragungswelle 5 antriebsmäßig miteinander verbunden. Die Übertragungswelle 5 ist auf einem Gerätegestell 6 drehbar gelagert und trägt einerseits die Kurbel 1 und andererseits die die Drehmomenterzeugungseinrichtung bildende Baueinheit 4. Die Übertragungswelle 5 durchgreift eine gestellseitig vorgesehene Lagerbüchse 7 und ist in dieser drehbar gelagert. Diese Lagerung ist zweckmäßig als Kugellagerung ausgebildet, die in vorteilhafter Weise besonders widerstandsarm ist, was Verfälschungen des Ergebnisses einer Drehmomentmessung entgegenwirkt. Im dargestellten Beispiel ist eine Doppelkugellagerung mit zwei an den Enden der Lagerbüchse 7 angeordneten Kugellagern 25 vorgesehen. Die Lagerbüchse 7 ist an einer gestellseitigen Querstrebe 8 befestigt, die an der Außenseite von zwei gestellseitigen Standholmen angebracht ist.The torque-generating device and the crank 1 are drivingly connected to each other by a transmission shaft 5. The transmission shaft 5 is rotatably mounted on a device frame 6 and carries on the one hand the crank 1 and on the other hand, the torque generating device forming unit 4. The transmission shaft 5 passes through a frame side provided bearing bushing 7 and is rotatably mounted in this. This storage is expediently designed as a ball bearing, which is particularly low in resistance in an advantageous manner, which counteracts distortions of the result of a torque measurement. In the example shown, a double ball bearing with two arranged at the ends of the bearing bush 7 ball bearings 25 is provided. The bearing bush 7 is fixed to a frame-side cross member 8, which is mounted on the outside of two frame-side stanchions.

Auf dem gegenüber der Lagerbüchse 7 nach außen vorspringenden Endbereich der Übertragungswelle 5 ist eine die Kurbel 1 tragende Muffe 9 aufgenommen. Auf dem gegenüber der Lagerbüchse 7 nach innen vorspringenden Abschnitt der Übertragungswelle 5 ist die die Drehmomenterzeugungseinrichtung bildende Baueinheit 4 aufgenommen. Diese ist mit einem ein Element des Räderzugs des Untersetzungsgetriebes 3 bildenden Anschlussorgan 10 versehen, das auf den inneren Abschnitt der Übertragungswelle 5 aufgesteckt ist und drehschlüssig hiermit zusammenwirkt. Das Anschlussorgan 10 ist durch in Figur 1 angedeutete Lager 26 drehbar im Gehäuse des Getriebes 3 der Baueinheit 4 gelagert. Zur Bildung des Anschlussorgans 10 ist ein Getrieberad 11 mit einer Nabe 12 versehen, in die die Übertragungswelle 5 eingreift, die drehschlüssig hiermit verbunden ist. Im dargestellten Beispiel ist hierzu eine Passfeder 13 vorgesehen. Die einerseits die Baueinheit 4 und andererseits die Kurbel 1 tragende, in der Lagerbüchse 7 drehbar gelagerte Übertragungswelle 5 ergibt praktisch eine fliegende, gestellseitige Lagerung der Baueinheit 4 und der Kurbel 1.On the opposite side of the bearing bush 7 outwardly projecting end portion of the transmission shaft 5 a crank 1 bearing sleeve 9 is received. On the opposite side of the bearing bush 7 inwardly projecting portion of the transmission shaft 5, the torque generating device forming unit 4 is added. This is provided with an element of the gear train of the reduction gear 3 forming connecting member 10 which is plugged onto the inner portion of the transmission shaft 5 and rotatably cooperates with this. The connecting member 10 is through in FIG. 1 indicated bearings 26 rotatably mounted in the housing of the transmission 3 of the assembly 4. To form the connecting member 10, a gear 11 is provided with a hub 12, in which the transmission shaft 5 engages, which is rotationally connected thereto. In the example shown, a key 13 is provided for this purpose. The one hand, the assembly 4 and on the other hand, the crank 1 bearing, rotatably mounted in the bearing bush 7 transmission shaft 5 results in practically a flying, frame-side mounting of the assembly 4 and the crank. 1

Die mittels der drehschlüssig mit dem Anschlussorgan 10 der Drehmomenterzeugungseinrichtung zusammenwirkenden Übertragungswelle 5 um deren Achse schwenkbar auf dem Gerätegestell 6 aufgenommene Baueinheit 4 ist durch eine Stützeinrichtung 14 in beiden Richtungen verdrehsicher am Gerätegestell 6 abgestützt. Hierzu ist eine Anlenkung vorgesehen. Die Stützeinrichtung 14 enthält einen zweischenkligen Bügel 15, der mit einem Schenkel an der Gehäuseanordnung der Baueinheit 4 befestigt ist und dessen anderer Schenkel den Elektromotor 2 flankiert und an seinem freien Ende an ein Kraftmessglied 16 angelenkt ist, das andererseits an einen benachbarten Standholm 17 des Gerätegestells 6 angelenkt ist. Der Bügel 15 ergibt einen vergleichsweise großen Abstand des Kraftmessglieds 16 von der durch die Achse der Übertragungswelle 5 gebildeten Drehachse der Baueinheit 4 und damit einen vergleichsweise großen Hebelarm. Das Gehäuse des Untersetzungsgetriebes 3 bietet gute Möglichkeiten zum Anbringen des Bügels 15. Dieser ist daher mit seinem vom Kraftmessglied 16 abgewandten Schenkel am Gehäuse des Untersetzungsgetriebes 3 befestigt und flankiert mit seinem anderen Schenkel den Elektromotor 2. Zur Entlastung des Kraftmessglieds 16 ist die Baueinheit 4 in einer stabilen Pendellage, d. h. Gleichgewichtslage, durch die Stützeinrichtung 14 am Gerätegestell 6 abgestützt, so dass bei unbelasteter Kurbel 1 auch das Kraftmessglied 16 unbelastet ist.The cooperating by means of the rotatably cooperating with the connecting member 10 of the torque generating device 5 transmitting shaft 5 about the axis pivotally mounted on the device frame 6 assembly 4 is supported by a support means 14 in both directions against rotation on the device frame 6. For this purpose, a linkage is provided. The support means 14 includes a two-legged bracket 15 which is fixed with one leg to the housing assembly of the assembly 4 and the other leg flanking the electric motor 2 and hinged at its free end to a force transducer 16, on the other hand to an adjacent stand post 17 of the equipment rack 6 is articulated. The bracket 15 results in a comparatively large distance of the force measuring element 16 from the axis of rotation of the transmission shaft 5 formed axis of rotation of the assembly 4 and thus a comparatively large lever arm. The housing of the reduction gear 3 offers good opportunities for attaching the bracket 15. This is therefore To relieve the load cell 16, the assembly 4 in a stable pendulum position, ie equilibrium position, supported by the support means 14 on the device frame 6, so that with unloaded crank 1 and the force measuring element 16 is unloaded.

Die Kurbel 1 wird von der Übungsperson bzw. dem Motor in Drehrichtung hin- und herbewegt. Der maximale Schwenkwinkel ist begrenzt. Hierzu ist die das Anschlussorgan 10 durchgreifende Übertragungswelle 5 an ihrem das Gehäuse des Untersetzungsgetriebes 3 überragenden, kurbelfernen Endbereich mit einem durch eine aufgesetzte Nocke gebildeten, radialen Vorsprung 18 versehen, der mit einem an das Gehäuse des Untersetzungsgetriebes 3 angesetzten, festen Gegenanschlag 19 zusammenwirkt.The crank 1 is reciprocated by the exercise person or the motor in the direction of rotation. The maximum swing angle is limited. For this purpose, the connecting member 10 by cross transmission shaft 5 is provided at its the housing of the reduction gear 3 superior, crank-remote end portion formed by a patch cam, radial projection 18 which cooperates with an attached to the housing of the reduction gear 3, fixed counter-stop 19.

Das Kraftmessglied 16 misst eine Kraft, die unter Berücksichtigung des Abstands von der Achse der als Drehachse der Baueinheit 4 fungierenden Übertragungswelle 5 ein Moment ergibt, das praktisch das Reaktionsmoment zu dem an der mit der Übertragungswelle 5 verbundenen Kurbel 1 angreifenden Moment darstellt. Infolge der vorgesehenen Anlenkung sind gegensinnige Belastungsrichtungen möglich. Das Kraftmessglied 16 ist daher zweckmäßig so ausgebildet, dass es bei jeder Kraftrichtung anspricht. Da der Abstand des Kraftmessglieds 16 von der Drehachse baulich vorgegeben ist, stellen die durch das Messglied 16 aufgenommenen Messwerte zum Moment direkt proportionale Werte dar. Der Ausgang des Messglieds 16 ist über eine Signalleitung 20 mit einer elektronischen Recheneinrichtung 21 verbunden, welche die gemessenen Werte in der gewünschten Weise verarbeitet. Die Signalübertragung zwischen Kraftmessglied 16 und Recheneinrichtung 20 erfolgt zweckmäßig auf elektrischem Wege. Das Kraftmessglied 16 enthält daher vorteilhaft einen Dehnmessstreifen (DMS), der direkt elektrische Signale erzeugt, so dass eine Umwandlung entfallen kann.The force measuring element 16 measures a force which, taking into account the distance from the axis of the transmission shaft 5 which acts as the axis of rotation of the structural unit 4, results in a moment which in practice represents the reaction torque to the torque acting on the crank 1 connected to the transmission shaft 5. As a result of the proposed articulation opposing loading directions are possible. The force measuring element 16 is therefore expediently designed so that it responds in each direction of force. Since the distance of the force measuring element 16 from the axis of rotation is structurally predetermined, the measured values taken by the measuring element 16 represent directly proportional values at the moment. The output of the measuring element 16 is connected via a signal line 20 to an electronic calculating device 21, which stores the measured values in FIG the desired Way processed. The signal transmission between force measuring element 16 and computing device 20 is advantageously carried out by electrical means. The force measuring element 16 therefore advantageously contains a strain gauge (DMS), which generates direct electrical signals, so that a conversion can be omitted.

Das Kraftmessglied 16 bildet praktisch einen der Recheneinrichtung 20 zugeordneten Ist-Wert-Aufnehmer. Die Recheneinrichtung 20 kann z.B. als Regler eines dem Elektromotor 2 zugeordneten Regelkreises fungieren. Bei Krafttrainingsgeräten hier vorliegender Art besteht aber vielfach auch der Wunsch, während der gesamten Übungszeit einer Übungsperson das an der Kurbel 1 wirksame Drehmoment aufzunehmen, um beispielsweise bestimmte Schwächen der Übungsperson festzustellen oder Trainingserfolge zu dokumentieren etc.. Um die Messwerte sichtbar machen zu können kann der Recheneinrichtung 20 eine im dargestellten Beispiel angedeutete Anzeigeeinrichtung 22 in Form eines Bildschirms oder dergleichen zugeordnet sein. Im dargestellten Beispiel ist eine während eines Übungstakts, das heißt beispielsweise während einer aktiven Bewegung aufgenommene Kraftkurve 23 dargestellt, die eine bei 24 angedeutete, beispielsweise auf eine Schwäche eines bestimmten Muskels der Übungsperson zurückzuführende Unregelmäßigkeit aufweist. Diese Information ermöglicht es, das Training auf eine gezielte Stärkung des geschwächten Muskels abzustimmen. Durch Speicherung der aufgenommenen Werte über einen längeren Zeitraum lässt sich auch der durch eine unterbrochene Linie angedeutete Trainingserfolg dokumentieren.The force measuring element 16 practically forms one of the computing device 20 associated actual value pickup. The computing device 20 may be e.g. act as a controller of the electric motor 2 associated control loop. In weight training devices here present type but there is often the desire to take during the entire exercise time of a person exercising the effective torque on the crank 1, for example, determine certain weaknesses of the person exercising or training successes to document etc .. In order to make the readings can be the Computing device 20 may be associated with an indicated in the example shown display device 22 in the form of a screen or the like. In the illustrated example, a force curve 23 recorded during an exercise cycle, that is to say, for example, during an active movement, is shown, which has an irregularity indicated at 24, for example due to a weakness of a specific muscle of the exercise person. This information makes it possible to adjust the training to a targeted strengthening of the weakened muscle. By storing the recorded values over a longer period of time, the training success indicated by a broken line can also be documented.

Der Elektromotor 2 kann als direkt regelbarer Motor ausgebildet sein. Es wäre aber auch denkbar, dem Elektromotor 2 eine in die Baueinheit 4 integrierte, regelbare Rutschkupplung beispielsweise in Form einer Wirbelstromkupplung, zuzuordnen und diese in Abhängigkeit von den Messwerten des Kraftmessglieds 16 zu regeln. Zur Vermeidung einer regelbaren Rutschkupplung kann der Elektromotor als Drehstrommotor ausgebildet sein, dem als Leistungsteil ein Frequenzumrichter zugeordnet ist, mittels dessen die Frequenz und die Stärke des dem Elektromotor zugeführten Drehstroms einstellbar sind, wobei die Stromstärke zumindest in Abhängigkeit vom gewünschten Drehmoment einstellbar ist und wobei die Frequenz so einstellbar ist, dass die Drehzahl des Drehfelds des dem Elektromotor zugeführten Drehstroms um eine vorgegebene Schlupfdrehzahl von der anhand der Messwerte einer dem Ausgang der Drehmomenterzeugungseinrichtung zugeordneten Positionsmesseinrichtung errechenbaren tatsächlichen Drehzahl des Elektromotors abweicht.The electric motor 2 can be designed as a directly controllable motor. It would also be possible, the electric motor 2 in the Unit 4 integrated, adjustable friction clutch, for example in the form of an eddy current coupling to assign and to regulate this function of the measured values of the force measuring element 16. To avoid a controllable slip clutch, the electric motor may be formed as a three-phase motor, which is associated with a frequency converter, by means of which the frequency and the strength of the electric motor supplied three-phase current are adjustable, the current is adjustable at least in dependence on the desired torque and wherein the Frequency is adjustable so that the rotational speed of the rotating field of the three-phase current supplied to the electric motor deviates from the actual rotational speed of the electric motor which can be calculated from the measured values of a position-measuring device assigned to the output of the torque-generating device by a predetermined slip speed.

Claims (10)

  1. An exercise apparatus, in particular a strength training apparatus, comprising a transmission shaft (5) rotatably mounted on an apparatus frame (6), which interacts, on the one hand, with a torque generating device (2, 3) accommodated on the apparatus frame (6) and, on the other hand, with an exercise member (1) that may be gripped by an exercising person, and comprising a force measuring element (16) that detects the torque acting upon the exercise member (1), characterized in that the torque generating device (2, 3) is designed as a structural unit (4) having a cohesive housing system, which is non-rotatably accommodated on the transmission shaft (5) by a drivable connecting member (10) and is suspended on the apparatus frame (6) in a swiveling manner, and which is non-torsionally supported on the apparatus frame (6) in both directions of rotation by a supporting device (14) including the force measuring element (16).
  2. The exercise apparatus according to Claim 1, characterized in that the structural unit (4) preferably designed as a geared motor and including the torque generating device is situated in a stable pendulum position and is non-torsionally supported in this position in both directions on the apparatus frame (6).
  3. The exercise apparatus according to one of the preceding claims, characterized in that the structural unit (4) including the torque generating device is over-mounted on the apparatus frame (6) above the transmission shaft (5).
  4. The exercise apparatus according to Claim 3, characterized in that the transmission shaft (5) is preferably mounted by ball bearings (25) in a bearing bush (7) provided on the frame and engages therewith and interacts with the exercise element (1) via an area projecting over the bearing bush (7), and engages with a connecting member (10) by its opposite area projecting over the bearing bush (7) and is non-rotatably connected thereto.
  5. The exercise apparatus according to Claim 4 or 5, characterized in that the connecting member (10) of the torque generating device is designed as a driving gear (11) having a hub (12), which is mounted on the transmission shaft (5) and is run on bearings in the housing of the torque generating device.
  6. The exercise apparatus according to one of the preceding claims, characterized in that the maximum rotation angle of the transmission shaft (5) is limited by a limit stop system.
  7. The exercise apparatus according to Claim 6, characterized in that the transmission shaft (5) engages with the connecting member (10) of the torque generating device and is provided with a radial projection (18) on the end area protruding from the torque generating device, the projection being assigned to the limit stop (19) attached to the torque generating device.
  8. The exercise apparatus according to one of the preceding claims, characterized in that the force measuring element (16) integrated into the supporting device (14) includes a strain gauge.
  9. The exercise apparatus according to one of the preceding claims, characterized in that the torque generating device is designed as a geared motor (2, 3), and the supporting device (14) has a bracket (25) that is attached by one end to the housing of the torque generating device and flanks the motor of the torque generating device, the force measuring device (16) being pivoted to the other end of the bracket and also pivoted to the apparatus frame (6).
  10. The exercise apparatus according to one of the preceding claims, characterized in that the output of the force measuring element (16) is connected to an arithmetic unit (21) by a signal line (20), the force measuring element (16) preferably being designed as an actual value sensor of a regulating circuit assigned to the torque generating device, the regulator of the regulating circuit forming the arithmetic unit (21), to which a display device (22) is preferably assigned.
EP05006695A 2004-04-10 2005-03-26 Training device Not-in-force EP1584355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004017679A DE102004017679B4 (en) 2004-04-10 2004-04-10 exerciser
DE102004017679 2004-04-10

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EP1584355A2 EP1584355A2 (en) 2005-10-12
EP1584355A3 EP1584355A3 (en) 2005-12-28
EP1584355B1 true EP1584355B1 (en) 2009-06-24

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AT (1) ATE434469T1 (en)
DE (2) DE102004017679B4 (en)
ES (1) ES2329478T3 (en)

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Publication number Priority date Publication date Assignee Title
NL2005775C2 (en) * 2010-11-29 2012-05-30 Onder De Linden B V DEVICE FOR BODY EXERCISE.
WO2013024180A1 (en) * 2011-08-12 2013-02-21 Secuencial Dynamic Trainer, S.L. Training device
DE102021119179A1 (en) 2021-07-23 2023-01-26 Michael Zimmermann Training device for improved training control
DE102021119188A1 (en) 2021-07-23 2023-01-26 Michael Zimmermann Mobile base support for a training device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2608313C2 (en) * 1976-02-28 1982-10-07 Robert Bosch Gmbh, 7000 Stuttgart Ergometer
US4765315A (en) * 1984-11-29 1988-08-23 Biodex Corporation Particle brake clutch muscle exercise and rehabilitation apparatus
DE3541501A1 (en) * 1985-11-23 1987-05-27 Dieter Miehlich Exercise apparatus
US4785674A (en) * 1987-01-20 1988-11-22 Orman Gary M Torque sensor
DE19653862A1 (en) * 1996-12-21 1998-06-25 Dieter Miehlich Training device
DE20216480U1 (en) * 2002-10-24 2004-02-26 Hat Hummert Antriebstechnik Gmbh Device for determining the performance of ergometers

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ES2329478T3 (en) 2009-11-26
DE102004017679B4 (en) 2013-09-26
EP1584355A2 (en) 2005-10-12
DE102004017679A1 (en) 2005-11-03
ATE434469T1 (en) 2009-07-15
EP1584355A3 (en) 2005-12-28
DE502005007544D1 (en) 2009-08-06

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