WO2009132471A1 - Lance-balles destiné à générer des tirs à spin reproductibles dans des directions quelconques - Google Patents

Lance-balles destiné à générer des tirs à spin reproductibles dans des directions quelconques Download PDF

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Publication number
WO2009132471A1
WO2009132471A1 PCT/CH2009/000137 CH2009000137W WO2009132471A1 WO 2009132471 A1 WO2009132471 A1 WO 2009132471A1 CH 2009000137 W CH2009000137 W CH 2009000137W WO 2009132471 A1 WO2009132471 A1 WO 2009132471A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball
machine according
flywheels
acceleration
belt
Prior art date
Application number
PCT/CH2009/000137
Other languages
German (de)
English (en)
Inventor
Luzius Brodbeck
Petra Ehmann
Franziska Ullrich
Fabian Schwendimann
Christoph Wangler
Fabio Wernle
Lino Guzella
Robert Riener
Original Assignee
ETH Zürich
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 ETH Zürich filed Critical ETH Zürich
Publication of WO2009132471A1 publication Critical patent/WO2009132471A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
    • A63B69/406—Stationarily-arranged devices for projecting balls or other bodies with rotating discs, wheels or pulleys gripping and propelling the balls or bodies by friction
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
    • A63B2069/402—Stationarily-arranged devices for projecting balls or other bodies giving spin

Definitions

  • the present invention relates to a ball-shooting machine which can be used as a training device or for scientific experimental research.
  • WO2008 / 016706 describes a corresponding construction in which the ball is accelerated by means of discs in a short acceleration path, whereby different speeds and spins can be transmitted to the ball.
  • the machine accelerates a ball to a predefined speed and predefined spin and shoots the ball. This happens a given way and
  • the ball is inserted by hand via a feeder in the machine.
  • the machine consists on the one hand of an acceleration unit. This transfers the desired speed and spin to the ball.
  • the machine consists of a positioning unit which makes it possible to set the launching angle and inclination of the acceleration unit and the spin axis.
  • the positioning unit can be adjusted manually; the setting includes the
  • the machine can save a lot of energy due to the high inertia of the flywheels.
  • the machine has two belts to accelerate the ball.
  • the machine is transportable. At her four wheels are fixed, which are extended can. This will raise the machine and allow it to be moved out of place.
  • the direction of the launch can be adjusted via three axes.
  • the speed axis can be adjusted around the horizontal and vertical axis.
  • the spin axis can be rotated around the firing axis.
  • the machine is easy to use.
  • the motors and the lifting cylinder can be controlled via an external console.
  • the machine allows a ball to be speed and spin.
  • the ball is inserted into the machine through a linear feed. Normally, speed and spin are transferred to the ball by frictional engagement with the belts.
  • the belts are supported by slide rails.
  • the axes of the flywheels are preferably parallel.
  • the ball throwing machine is preferably characterized in that it is transportable.]]]
  • a ball machine with at least two flywheels, which each drive at least one belt and the ball is guided between the two belts.
  • the ball throwing machine has an exit point of the balls, and the ball is guided in an accelerating distance from the entrance of the machine via at least 15 cm rectilinear straps to the flywheels at the exit. That is, the ball is accelerated over a linear acceleration distance of at least 15 cm over these belts.
  • speed and spin are transmitted to the ball essentially by frictional engagement with the belt.
  • the ball is guided over more than 60 cm straight straps from the entrance to the flywheels.
  • the flywheels are preferably arranged on the output side, while the input side, that is where the balls are introduced into the machine, a deflection roller is arranged.
  • the belts are driven via the flywheels at the output and fed back at the input via pulleys to the guide.
  • the ball throwing machine only has two belts which accelerate the ball. These two belts are preferably arranged in a sense opposite, that is, they touch and accelerate respectively drive the ball on both sides in the equatorial plane. The ball is effectively clamped between the two straps.
  • slide rails or other guide elements are preferably additionally arranged along the acceleration section.
  • the ball is thus additionally guided over slide rails from the entrance to the exit.
  • slide rails are preferably arranged parallel to the direction of acceleration so that the ball is caught by the slide rails and the two belts.
  • one slide is located at the top (to some extent at the north pole) and another slide at the bottom (to some extent at the south pole), that is, the ball becomes perpendicular to the direction of acceleration at four evenly distributed around the circumference points out.
  • a big advantage of the proposed ball throwing machine is that with great reliability, a self-rotation of the ball can be generated. This is possible by adjusting the speeds of the flywheels independently of each other during the acceleration of the ball in the acceleration channel.
  • Another great advantage of the proposed ball throwing machine is that it can handle big and heavy balls such as high quality and high quality footballs Speed can speed up.
  • the flywheels that drive the belts have a high mass of at least 15 or at least 30 kg. Since the energy storage capacity of this flywheel for rotational energy is ultimately crucial so that the acceleration of the ball as little as possible couples back to the rotation of the acceleration module (the mass of the ball should be small in relation to the inertia of the rotating elements of the acceleration module), can be formulate this as the preferred moment of inertia of the flywheels.
  • At least one, preferably both, of the flywheels has a high moment of inertia, more preferably at least 0.5 kg * m ⁇ 2.
  • the guide axis of the acceleration section in its direction horizontally (to some extent rotation about its own axis) and vertically (inclination angle upward) can be changed.
  • the firing direction can be adjusted laterally and in their inclination.
  • the adjustment by these two angles can preferably be automated and controlled, that is, for example, a control console is provided which adjusts the two angles.
  • the acceleration unit is rotatably adjustable about its own axis. This means that, so to speak, the acceleration section can be rotated about the direction of the acceleration. This allows to specifically adjust the spin of the ball.
  • the ball is let into the machine through a straight line feed. This ensures that the ball is optimally guided between the two belts and the optional slide rails.
  • the belts are toothed belts.
  • the timing belts are used so that when the flywheels are driven by the engine, the flywheels dispose of a toothing and the toothed belt with its teeth is guided around the inside of the flywheel. In other words, then the back of the toothed belt, which does not have a toothing, in contact with the surface of the Balls.
  • a toothed belt is typically based on a polymer material which is reinforced with fibers.
  • a tensile strand which usually consists of glass fibers or aramid fibers (also possible from steel ropes).
  • the backside of the toothed belt is typically an elastomeric plastic surface having a high stiction and can be used directly in contact with the ball.
  • the belts are supported by slide rails. These slide rails run along the belts in the contact area with the ball and are arranged on the side of the belt facing away from the ball. You can have a groove in which the belt is guided to prevent the belt slides off the side of the slide rail.
  • a preferred embodiment is characterized in that only two belts in the form of toothed belts having a width in the range of typically 0.5-10 cm, preferably in the range of 3-7 cm, are provided, between which the ball is clamped on substantially opposite lateral sides , In this case, the non-toothed surface of the toothed belt faces the ball.
  • the two belts are arranged substantially in a common plane (preferably an equatorial plane of the ball, that is, a plane through the center of the ball) and the axes of the externally toothed flywheels driven by preferably individual motors are arranged in parallel.
  • a single engine which has a transmission via which the two flywheels can be driven at different speeds.
  • the ball is preferably guided on the top and the bottom in addition via guide elements.
  • the ball throwing machine furthermore preferably has a positioning unit and an acceleration unit with the two flywheels and the two belts rotatably mounted in the latter around the direction of the acceleration section.
  • the positioning unit supports the acceleration unit rotatable about a vertical axis and rotatable about a horizontal axis (inclination).
  • at least the setting of the rotation about the horizontal axis in particular preferably the adjustment of the rotation about the horizontal and the vertical axis, and very particularly preferably about all axes via a respective drive adjustable.
  • the control of these drives via a single console is possible, which also control the motors at the same time. It is thus possible, for example, to specify a target point and a target speed as well as a target spin for the ball, and the machine calculates the settings of the angles and the engine rotational speed required for these values.
  • the ball-throwing machine preferably has a control by means of which automatically the control of the speed of the flywheel driving motors, the exit velocity and the spin of the ball, taking into account the aerodynamic properties of the ball can be brought to a predetermined value.
  • this control can still control the drives for the aforementioned angle settings.
  • the desired coordinates of the impact point and / or the impact velocity and / or the impact pin preferably serve as the basis.
  • the user may indicate the initial speed and spin of the ball, the controller then calculates the required motor speeds and the impact point of the football, taking into account the ball's aerodynamic properties, and optionally the necessary adjustment of the angles about the horizontal, vertical and rotational axes the acceleration section.
  • the controller preferably transmits via frequency converter to the two motors located in the acceleration module.
  • the ball throwing machine is transportable, for example, by being provided with lowerable rollers, which allow the ball machine to be moved on the playing field, for example, to the desired location.
  • the acceleration unit comprises two substantially identical respectively identical or mirror-symmetrical acceleration modules, which are arranged mirror-symmetrically on both sides of the acceleration section, wherein preferably the two driven by the motors flywheels arranged on the outlet side are.
  • Such a ball machine is preferably used for the shooting of soccer balls, especially for training purposes, most preferably for the training of goalkeepers. Further preferred embodiments of the invention are specified in the claims.
  • Figures 1 and 3 show the machine without panels, in which Figure Ia shows a rear view and in Figure Ib a side view and in Figure 3 a perspective view obliquely from above and in these figures the straps are omitted are.
  • FIG. 2 shows the drive unit, respectively one of the two belt arrangements
  • the machine consists of two units that can be mounted separately.
  • Each flywheel 1 is driven by a separate motor 7.
  • the timing belts are deflected by pulleys 2.
  • Slide rails 4 support the belts 6 on the acceleration section and ensure a constant contact force between ball and belt.
  • the drive unit is supported by a frame 15.
  • the positioning unit 9 stands on a bottom plate. At this boom are attached, these serve to stabilize the entire machine.
  • forks 17 On the bottom plate 16 are forks 17 with ball bearings 18. These forks 17 carry the rotary plate 19, which can rotate about the vertical axis 20.
  • the lifting cylinder 22 has the function to adjust the inclination angle of the ball launch.
  • rings 24 are attached at the inlet and at the outlet of the ball.
  • Drive unit 8 to the firing axis 26 are rotated arbitrarily.
  • the set positions are fixed.
  • the brakes are released or tightened manually.
  • the shots have high accuracy and high repeatability and are as realistic as possible.
  • the football machine transfers speed and spin to regular football, which can be achieved in regular game situations.
  • the speed of football can reach up to about 120 km / h, while speeds of rotation of up to 16 revolutions per second can be set.
  • the speeds, translational and rotational can be adjusted manually and continuously, so that a high accuracy of ball shot and a high repeatability of the ball trajectory can be produced.
  • the repeatability of the shot was experimentally explored and is a deviation from the impact point of about 0.2 m to a firing distance of 20 m and is therefore very low.
  • the accuracy of the shot is also very high.
  • a separate controller for the machine is available. Either the desired coordinates of the impact point can be specified. The controller then calculates the required initial speed and spin of the ball and the corresponding motor speeds. When the user indicates the initial speed and spin of the ball, the controller calculates the required engine speeds and the impact point of the football, taking into account all the aerodynamic properties of the ball. These are transmitted via frequency converters to two motors 7 (2.2 kW each) located in the acceleration module. Each motor 7 drives a toothed belt 6. The timing belt 6 transmit the speed to the ball. If. the belts 6 run at different speeds, so in addition to the translation, a rotation is transmitted to the ball and swirl is generated.
  • Timing belts 6 have been chosen for the belt drives, since no slip occurs between the belt 6 and the flywheels 1 and deflecting disks 2.
  • the toothed belt 6 are supported by belt guides 4.
  • the belts 6 are opposite each other.
  • the belt drives each contain a flywheel 1, which has a very high moment of inertia and therefore can store a lot of energy. This energy is then transferred to the ball during the shot.
  • the ball is guided by two guide rails 3 so that the ball can not "lurch.”
  • Each belt drive generates a belt tension by an eccentric 5.
  • the two belt drives and the guide rails are held by a plastic frame or metal frame (for example aluminum frame) 15.
  • the frame is by means of Profiles based on modular design, so that changes can be made at short notice. For example, when a ball of a different diameter is to be launched, the distance between the belts 6 must be changed.
  • the figures show the basic conception of the acceleration module. It should be noted that only one side is shown, the module is symmetrical.
  • the acceleration module is held and oriented by the lower alignment module.
  • the alignment module makes it possible to create a horizontal launching angle by means of a pneumatic cylinder. Furthermore, an angle to the vertical can be generated.
  • the acceleration module can be rotated about its own axis.
  • the alignment module can therefore change three angles, so the direction of the spin axis of the ball can be set arbitrarily.
  • four wheels can be attached to the alignment module so that the machine is mobile. The wheels are removed during the shot so that the stability of the machine is guaranteed.
  • the invention makes it possible to create a real game situation and to reproduce a precisely placed football shot.
  • FIG. 2 shows one of the two core parts of the ball throwing machine, namely one of the two acceleration modules 8a, as they are arranged in an acceleration unit 8 on both sides of the ball.
  • the acceleration module 8a has on the output side via a flywheel I 9 which has a toothing running over the circumference.
  • This flywheel 1 is driven via a drive wheel, which is arranged on the same axis, via a drive toothed belt 12 by a motor 7.
  • the motor 7 has a drive pinion, which also has a toothing on the outside, so that a toothed belt can be used as the drive belt 12.
  • the motor 7 is controllable, preferably via an electronic control.
  • the flywheel 1 drives a toothed belt 6, which on the one hand on the input side is deflected by a deflection roller 2 and on the other hand can be adjusted in its voltage via a so-called eccentric roller 5.
  • the toothed belt 6 is guided over a certain extent (with respect to the ball) behind the toothed belt 6 arranged slide rail 4, so that there is a clearly defined linear acceleration section.
  • the acceleration distance for the ball 10 along the conveying direction 13 is preferably at least 15 cm long, typically more than 50 cm or even more than 60 cm long.
  • the acceleration distance for the ball is generally in the range from 40-100 cm long.
  • the acceleration channel has a guide rod 3 both at the top and at the bottom.
  • the ball is thus circumferentially distributed over four preferred symmetrically distributed circumferential points caught and can iw only move along the conveying direction 13.
  • a guide and the help of a guide rod it is also possible, for example, to arrange a plurality of small rollers in a row or a passive belt guide.
  • Two such acceleration modules 8a which are to a certain extent mirror-symmetrical, are incorporated in a ball throwing machine, as shown in FIGS. 1 and 3, specifically in the frame 15 of an acceleration unit 8 of such a ball throwing machine.
  • a ball throwing machine comprises a positioning unit 9 and an acceleration unit 8.
  • the positioning unit 9 stands on the ground and supports the acceleration unit 8.
  • the positioning unit 9 comprises and stands on a bottom plate 16, this bottom plate 16 may be provided with rollers for moving the entire ball machine, wherein the rollers may be removable, or may be lowered.
  • this base plate 16 bearing points in the form of fork-shaped elements 17 are arranged concentrically, which bearings, here in the form of ball bearings 18 carry.
  • a rotary plate 19 runs around this rotary plate 19, the frame 14 of the positioning unit 9 is rotatably mounted about the vertical axis 20.
  • the structure has brakes 27, which can be set manually in this case.
  • On the rotary plate 19, a structure with a hinge 23 is provided. This joint 23 allows rotation of the frame 14 of the positioning unit 9 about a horizontal axis 21.
  • the rotation about this axis 21 is automatically adjustable in this embodiment and that is also on the rotary plate 19, a lifting cylinder 22 hinged, which is articulated on the frame 14, and which via a drive 29, of a central control can be controlled, is adjustable. Accordingly, the inclination, ie, the inclination angle with respect to the ground plane, can be adjusted automatically via the lifting cylinder 22 by rotation about the axis 21.
  • This basic construction of the positioning unit 9 thus permits rotation about the vertical axis 20 and rotation about the horizontal axis 21.
  • the box-shaped acceleration unit 8 is now also rotatably mounted. It is rotatable about the direction of the firing axis 26.
  • the rotation is realized in this embodiment, by the acceleration unit 8 and the frame 15 of the acceleration unit 8 both on the inlet side and on the outlet side has a ring 24.
  • This ring 24 is pivotally and rotatably supported via bearings 25 which are provided on the frame 14 of the positioning unit.
  • the two motors 7 are arranged therein laterally with their motor axis perpendicular to the firing axis 26 and the exit side, the flywheel 1 is arranged, while the inlet side, the deflection roller 2 is arranged. Also omitted for better visualization in the model according to Figures 1 and 3 is the deflection roller 2.
  • the actual acceleration distance for the ball is thus arranged between the two rings 24 and is essentially determined by the length of the two opposite guide rails 4.
  • the ball is preferably 3 introduced into the accelerating channel via a linear feed through the ring 24 facing the observer in FIG. 3, this at a time when preferably the two motors 7 are already at a rotational speed which conveys the ball to the desired destination. In other words, the ball is immediately detected by already very fast rotating belt 6 and immediately accelerated. LIST OF REFERENCE NUMBERS

Abstract

L'invention concerne un lance-balles comportant au moins deux poulies (1) qui entraînent chacune au moins une courroie (6), la balle (10) étant guidée entre les deux courroies (6), ainsi qu'un emplacement de sortie de balle. Selon l'invention, la balle est frottée sur au moins 15 cm de courroie (6) rectiligne, sur un parcours d'accélération depuis l'entrée de la machine jusqu'aux poulies (1) en sortie, la vitesse et le spin étant transmis à la balle (10) sensiblement par friction au moyen de la courroie.
PCT/CH2009/000137 2008-05-02 2009-04-29 Lance-balles destiné à générer des tirs à spin reproductibles dans des directions quelconques WO2009132471A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6872008 2008-05-02
CH687/08 2008-05-02

Publications (1)

Publication Number Publication Date
WO2009132471A1 true WO2009132471A1 (fr) 2009-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2009/000137 WO2009132471A1 (fr) 2008-05-02 2009-04-29 Lance-balles destiné à générer des tirs à spin reproductibles dans des directions quelconques

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110138A (en) * 1976-03-11 1977-09-16 Kazuo Endou Ball pitching machine
JPS5779565U (fr) * 1980-10-31 1982-05-17
JPS57134071U (fr) * 1981-02-13 1982-08-20
JPS60114282A (ja) * 1983-11-26 1985-06-20 西原　滋也 投球機
JP2000107339A (ja) * 1998-10-05 2000-04-18 Murakami Tekko Kk ボール射出装置
KR20020039126A (ko) * 2000-11-20 2002-05-25 서정현 슛팅 장치
FR2861312A1 (fr) * 2003-10-24 2005-04-29 Gerardus Cornelis Ouwerling Dispositif afin de propulser des ballons ou des balles rond(e)s utilise(e)s dans divers sports (football, tennis, etc)
EP1882500A1 (fr) * 2006-07-28 2008-01-30 Kurt Scheiwiller Dispositif destiné à éjecter des balles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110138A (en) * 1976-03-11 1977-09-16 Kazuo Endou Ball pitching machine
JPS5779565U (fr) * 1980-10-31 1982-05-17
JPS57134071U (fr) * 1981-02-13 1982-08-20
JPS60114282A (ja) * 1983-11-26 1985-06-20 西原　滋也 投球機
JP2000107339A (ja) * 1998-10-05 2000-04-18 Murakami Tekko Kk ボール射出装置
KR20020039126A (ko) * 2000-11-20 2002-05-25 서정현 슛팅 장치
FR2861312A1 (fr) * 2003-10-24 2005-04-29 Gerardus Cornelis Ouwerling Dispositif afin de propulser des ballons ou des balles rond(e)s utilise(e)s dans divers sports (football, tennis, etc)
EP1882500A1 (fr) * 2006-07-28 2008-01-30 Kurt Scheiwiller Dispositif destiné à éjecter des balles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 200275, Derwent World Patents Index; AN 2002-696159, XP002544378 *

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