EP1268023A1 - Vehicule de jeu comportant plusieurs roues a action gyroscopique - Google Patents

Vehicule de jeu comportant plusieurs roues a action gyroscopique

Info

Publication number
EP1268023A1
EP1268023A1 EP01924286A EP01924286A EP1268023A1 EP 1268023 A1 EP1268023 A1 EP 1268023A1 EP 01924286 A EP01924286 A EP 01924286A EP 01924286 A EP01924286 A EP 01924286A EP 1268023 A1 EP1268023 A1 EP 1268023A1
Authority
EP
European Patent Office
Prior art keywords
wheels
pair
toy vehicle
toy
motor
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Withdrawn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
EP01924286A
Other languages
German (de)
English (en)
Inventor
Neil Tilbor
Michael G. Hetman
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 EP1268023A1 publication Critical patent/EP1268023A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H17/00—Toy vehicles, e.g. with self-drive; ; Cranes, winches or the like; Accessories therefor
    • A63H17/004—Stunt-cars, e.g. lifting front wheels, roll-over or invertible cars

Definitions

  • the present invention relates to toys having gyroscopic wheels, and more particularly to toys having three or more gyroscopic wheels.
  • the concept of gyroscopic wheels and their effect in remote controlled toy applications has been shown in U.S. Patent No. 6,024,627 to Tilbor et al .
  • the remotely controlled toy vehicle of the '627 patent includes a pair of parallel front wheels, a pair of rear wheels and a pair of remotely controlled reversible electric motors each driving a separate one of the pair of rear wheels independently of the other motor and wheel . This independent control of the rear wheels enables the controller to selectively propel and steer the toy during operation.
  • the overall design of the toy in conjunction with rear wheel design are significant factors in the dynamic control and operation of the '627 toy.
  • a large percentage of the overall weight of the wheel is distributed about the outer circumference of the wheel. This weight redistribution provides the toy with increased stabilization resulting from the gyroscopic effect created by the high speed revolution of the toy's rear wheels.
  • the increased stabilization enables the toy to perform unique stunts and move faster and a in a significantly more controlled manner.
  • this toy is limited in its stunt capability based on the fact that the front wheels are not driven by motors and are therefore passively driven by the rear wheels.
  • the gyroscopic action is limited to the rear pair of opposing wheels .
  • This and other objects are achieved in accordance with an embodiment of the present invention in which one or more driven gyroscopic action wheels are added to a two- wheel drive vehicle.
  • the gyroscopic action wheels are independently driven by either independently driving all wheels on each side of the vehicle or independently driving opposing pairs of wheels.
  • the gyroscopic wheels are designed so that the overall weight of the vehicle with respect to the weight of the wheels falls within predetermined design criteria to obtain maximum stability in a dynamically changing stunt environment during operation.
  • Figure 1 is a perspective view of a toy having three gyroscopic action wheels according to a first embodiment of the invention
  • Figure 5 is a schematic representation of various wheel diameters of the gyroscopic action wheels of the present invention.
  • Figure 6a is front view of a gyroscopic action wheel according to an embodiment of the present invention.
  • Figure 6b is a partial cross-sectional view of the gyroscopic action wheel taken along line VI-VI of Figure 6a;
  • Figure 7 is a schematic representation of the toy having different diameter front and rear wheels
  • Figure 8a is a plan view of the gearing for the toy having gyroscopic action wheels according to an embodiment of the invention
  • Figure 9 is a top partial sectional view of the toy vehicle having different size front and rear wheels and showing the variations of the wheels surfaces.
  • Figure 1 shows an embodiment of a three-wheeled toy 1 having a main body 5, two rear wheels 10a and 10b and a third front wheel 10c connected to the main body through a body extension 7.
  • Body 5 includes all the motors and spur and/or differential gears for driving each of the respective wheels.
  • body 5 can change in shape and design to accommodate all necessary internal gears and electronics .
  • the gearing and drive mechanisms for front wheel 10c are enclosed by body extension 7.
  • all radio control electronics and batteries are contained within main body 7.
  • Those of ordinary skill understand the implementation of the radio controls and internal motor assemblies of these types of radio controlled vehicles. Example of such implementations can be seen in U.S. Patent No.
  • the toy 1 can include one, two or three separate motors for driving the respective gyroscopic action wheels.
  • a steering servo can be included to steer front wheel 10c in the three wheel configuration.
  • the rear wheels 10a and 10b can be driven independent of each other or together, and the front wheel 10c can be selectively driven by the user (i.e., motor driven that can be active or passive -on or off depending on the desire operation of the toy.
  • the overall stabilization of the vehicle during operation is increased, and a significantly larger range of stunt actions and dynamic movements are now available for the user.
  • these stunts include controlled wheelies, spins in any degree range (0-360) , rolling, instantaneous flipping in either direction including barrels rolling, end over end rolls and edge running.
  • the range of stunts and tricks capable of being performed by the toy vehicle of the invention are limited only by the user's ability to control them.
  • the gyroscopic action wheels of the present invention are remotely and independently controlled by the user, the type of terrain on which the vehicle is operated is irrelevant as the vehicle can pass through all types of terrain. Provided the main body of the vehicle is sealed accordingly, it is also contemplated that the vehicle of the present invention can traverse through water.
  • Figure 2 shows a four-wheeled toy 20 having a main body 22 and four gyroscopic action wheels 10a, 10b and lOd, lOe arranged in rear and front pairs, respectively.
  • all wheels 10a, 10b, lOd and lOe are driven wheels.
  • the side pairs of wheels 10a, lOd and 10b, lOe are remotely and independently controlled by reversible internal motors connected through any combination of spur and/or differential gears.
  • U.S. Patent No. 6,024,627 (incorporated herein by reference) shows the use of two independent motors for driving each rear wheel.
  • additional differential and/or spur gearing enabled the connection of one motor to each side pairs of wheels ( Figure 7) .
  • the distance X between the outermost circumferential surface of each wheel of the respective pair is preferably as close as possible.
  • X is no less than % inch in order to eliminate the possibility of creating a pinch point between the respective wheels.
  • One example of such parameter is described for the rear gyroscopic wheels in U.S.
  • Patent No. 6,024,627 The gyroscopic effect of the wheels is increased when the outside diameters O of the wheel increases with respect to the distance T between the inner surface of opposing wheels, i.e., the "inside track" which is the respective distances between wheels 10a and 10b and lOd and lOe.
  • the wheelbase W i.e., the distance between front and rear hubs
  • Di the wheel diameters Di. That is, for any given wheelbase, it is desirable to have the outside diameter of the wheels to be as large as possible without intersecting each other.
  • the inside track dimension T and wheelbase W also have a direct effect on each other (i.e., the wheelbase should be as close to the inside track dimension T as possible) , combined with the largest diameters Di possible for best gyro induced stunt action.
  • the inside track T and wheelbase W are substantially equal.
  • a relatively shorter wheelbase W or inside track T, or both creates shorter polar moments of inertia (i.e., minimal with respect to the wheelbase and inside track to reduce lateral moment of inertia) which allows the available gyro effect and torque reaction to operate with greater leverage against the vehicle mass. Thus, making more violent and dynamic stunt actions possible.
  • flywheels By placing gyroscopic action wheels on the front and rear of the vehicle, we have effectively placed large flywheels at the wheel positions of the vehicle.
  • the wheels are optimized to be efficient flywheels.
  • the use of flywheels to store energy and stabilize vehicles has been done before.
  • the present invention not only utilizes the stabilization effects of the gyroscopic action wheels (i.e., flywheels), but also harnesses the destabilization of such energy, the centrifugal forces created by the respective flywheels, the torque reaction on the vehicle body resulting from the instantaneous variation of the flywheel speed, the direction and angle of contact of the wheels with the running surface, and the number of wheels in contact with the ground at any given time in order to induce and create stunt forces and resulting actions never before available in a radio controlled toy.
  • the motor driving a pair of wheels can be instantaneously reversed.
  • This instantaneous reversing of a flywheel creates a destabilization effect of the stored energy.
  • the maximum torque output of an electric motor is when the motor is stalled from its operating rpm to 0 rpm.
  • the instantaneous stopping and reversing of one of the motors controlling one pair of gyroscopic action wheels will cause the centrifugal force of the wheels (i.e.
  • the pairs of gyroscopic action wheels can be opposing pairs (e.g., rear pair or front pair) and cooperating pairs (i.e., front and rear wheels on same side of vehicle) .
  • the overall weight of the toy with respect to the combined mass of the gyroscopic action wheels increases the performance of the toy vehicle.
  • the body and chassis is preferably as light as physically possible (with respect to the overall mass of the toy) with a centrally located center of gravity (i.e., with respect to the wheelbase) so that the wheels (which act as gyros) can best influence stunt action of the vehicle.
  • the torque reaction of opposing wheels or wheel pairs causes a range stunt inducing forces equal to or greater than the gyro effect created by each of the respective wheels.
  • the torque reaction and gyro effect are combined, another range of stunt inducing actions/forces are possible.
  • the combined body/chassis weight without a battery is approximately 600 grams, while the combined mass of the front and rear wheels is approximately 500 grams.
  • the total mass of the toy with the wheels is approximately 1100 grams.
  • wheels of different diameters are used (see Figure 7) , the mass of the front and rear wheels will be different (e.g., rear « 280 grams, and
  • the combined wheel mass is at least 40% of the overall mass of the toy, and at least 60% of the chassis/body mass (without the wheels) .
  • the preferred battery pack is a 9.6 volt nickel cadmium battery centrally disposed within the body/chassis and as close to the ground as possible to help lower the overall center of gravity of the toy, and thereby further increase the stability during operation.
  • the preferred battery pack is a 9.6 volt nickel cadmium battery centrally disposed within the body/chassis and as close to the ground as possible to help lower the overall center of gravity of the toy, and thereby further increase the stability during operation.
  • Figure 3 shows a six (6) wheel toy 30 similar to that described in Figure 2, having a main body 32 and another pair of driven gyroscopic action wheels.
  • all six wheels 10a, 10b, lOf, lOg, lOh, and lOi are driven.
  • Each of the three opposing pairs of wheels 10a, 10b, lOf, lOg and lOh, lOi also maintain an inside track distance relationship that works in conjunction with the gyroscopic action of the six driven wheels at the largest possible diameter to increase the stunt action of the toy vehicle.
  • Figure 4 shows another embodiment of a six (6) wheel radio controlled toy vehicle 40.
  • the inside track distances Ti, T 2 and T 3 between the respective pairs of opposing wheels 10a, 10b, 10f, lOg and lOh, lOi are different.
  • This difference in inside track distances enables an overlapping wheel arrangement of the vehicle 40.
  • the overlapping of the wheels allows for larger wheel outer diameters for a given overall vehicle length (i.e., front edge of front wheel to the rear edge of the rear wheel) , whereas the end to end placement of the wheels limits the outer diameters of the wheels for a given vehicle length.
  • the increased wheel diameters of the wheels increases the gyroscopic action of the wheels which, in combination with the overlapping wheel arrangement, also results in a broadened scope of the stunt actions, due to dynamic variations in wheel contact with the running surface.
  • Figure 5 shows a toy vehicle main body 50 and the arrangement of the main body on gyroscopic action wheels of varying diameter.
  • Three different diameter wheels 52, 54 and 56 are shown with their size and disposition with respect to body 12.
  • the diameter of these wheels can vary depending on the desired application and/or vehicle aesthetics.
  • Front and rear wheels can be of different diameters as well .
  • the tread on the wheel may also be varied with the diameter to achieve various levels of traction depending on the operating environment. For example, a knobby tread may be desirable on a smaller diameter wheel to increase traction in dirt applications, while a slick tread would be desirable for a larger diameter wheel on road type conditions to help achieve maximum speed output per revolution of the wheel .
  • main body 50 with respect to the longitudinal axis L can also be varied depending on the size of the wheels and in order to lower the vehicle toward the longitudinal axis and thereby lower its overall center of gravity.
  • Figure 6a shows a front view of an embodiment of the gyroscopic action wheel 10 according to the invention.
  • Figure 6b shows a partial sectional view of wheel 10 taken along line VI-VI of Figure 6a.
  • Wheel 10 includes an outer circumferential surface 60 with spokes 61 connecting the rim 60 with a central hub 62.
  • a vinyl or rubber tire 64 can be added to rim 60 to cover the same and provide increased traction on dry smooth terrain.
  • a harder durometer tire with little or no tread allows quicker rotational acceleration of the wheel due to less frictional contact with the ground, thereby causing the gyroscopic effect to be achieved much faster.
  • the vinyl or rubber tire 64 can also include a rib 66 that provides further traction advantages during stunts and/or changes of terrain.
  • the rim 60 can also include area 68 that is curved over the edge and becomes a sidewall 63 of the wheel 60.
  • the curved portion 68 of sidewall 63 is integral for stunt moves involving stunt tubes 24 where the toy vehicle rides on these sidewalls and stunt tubes for extended periods of time.
  • the radius of curvature of portion 68 can be, for example, 1/8" - 2" .
  • a hard plastic rub ring 69 can be disposed on or integrated into the curved portion 68 of the outer circumference of the wheel. The rub ring 69 is in contact with the running surface in place of the tire when the vehicle is operating at certain angles . The rub ring allows the wheels to "spool" or spin up to centrifugal speeds even when that wheel is still in contact with the running surface.
  • the wheels are designed to have various materials having different coefficients of friction disposed in different positions on the outer circumference of the wheel.
  • the rub ring 69 has a lower coefficient of friction than a softer rubber material (e.g., rubber or vinyl 64) .
  • a softer rubber material e.g., rubber or vinyl 64
  • Figure 9 shows a partial cross section of the wheels 10a and 10c.
  • wheels have several different points of contact 90, 92, 94, 96 with the running surface depending on its angle of operation.
  • points of contact 90, 92, 94 and 96 have been shown here for exemplary purposes. Those of skill in the art will recognize that there will be an almost infinite number of points of contact based on the operation of the toy and its stunt action motion caused by the interaction of the centrifugal forces, corresponding torque reactions, and the angular operation of the toy at any given time.
  • the diameters of the gyroscopic action wheels are preferably such that the toy vehicle 1 can also run upside down.
  • the entire range of stunt forces and action changes because the center of gravity of the toy (that is preferably disposed as low as possible for upright running) is now higher than before. Therefore, the operation of the toy at all varying angles and in all three dimensions is changed with respect to the upright running operation. This provides an even wider range of utility and action for the use.
  • the varying wheel diameters of the front and rear wheels also contribute to the different operation and force translations resulting from the user's flywheel management (i.e., control of the gyroscopic action wheels) when running the toy upside down.
  • the wheel 10 has an overall mass where at least two-thirds of the overall wheel mass is located within at least 20 percent of the outer end of the wheel radius R adjoining the outer circumference of each wheel .
  • the gyroscopic action of the wheels is dependent on the mass distribution of the wheels in combination with the rotational speed of the same.
  • the preferred rotational speed of the wheels is in a range of 800 to 1200 revolutions per minute (r.p.m.) under no load (i.e., not in contact with the ground) .
  • stunt tube 24 has a length S x from the front plane P of wheel 10.
  • the angle at which the vehicle may ride up on its side is decreased.
  • the length Si must be properly selected for each toy so as to readily allow the vehicle to achieve this angled running stunt (sidewall and stunt tube contacting ground on one side) for an extended period of time.
  • the selection of length Si also depends on the diameter of the respective wheels on which they are mounted.
  • Figure 9 shows an embodiment where the front wheel lOd of smaller diameter than rear wheel 10a has a smaller (S3) stunt tube 24 than the rear (S2) stunt tube 24.
  • the size of these stunt tubes can be for example, in a range of 20 - 40 mm.
  • the range of the angle/edge running can be from 0° (e.g., no stunt tube - allows the vehicle to drive on the outside face 63 of the wheels on one side) to 45° degrees.
  • stunt tube 24 has a diameter di that can also affect the size of the angle at which the toy can achieve angled running.
  • stunt tube 24 can be screwed into the hub 62 using a screw 70, or can be a snap on type pressure fit to eliminate the need for a screwdriver. When stunt tubes 24 are secured in place, the vehicle can ride on the ends of said stunt tubes at a 90° angle with respect to the running surface.
  • Stunt tubes 24 can also be removable and can be consumer replaceable with tubes of varying configuration and effective lengths.
  • Stunt tubes 24 can be added to any one or all of the wheels 10 to increase the stunt action of the toy vehicle and enable angled running on wheel edges and stunt tube ends, barrel roles, etc.
  • Figure 7 shows another preferred embodiment, where the front wheels have a diameter D 2 that is smaller than the rear wheel diameter D 3 .
  • D 2 diameter
  • D 3 diameter
  • FIGs 8a and 8b show one embodiment of the differential and spur gearing implemented to compensate for the varying wheel diameters.
  • the motor 80 includes a small spur gear 82 that drives a main gear 84.
  • Main gear 84 drives the rear wheel gear via intermediate gears 86 and 88, and drives the front wheel gear 96 via intermediate gears 92 and 94.
  • the gearing ratio for the front gears is adapted to compensate for the different diameter of the front wheel and enable the front wheel to rotate equally as fast as the rear wheel of a larger diameter.
  • front gears 92, 94 and 96 have a gearing ratio that enables the front wheel to rotate at 1000 rpm under no load (i.e., not in contact with a running surface) , while rear gears 86, 88 and 90 rotate the corresponding rear wheel at 900 rpm under no load.
  • these rpm ratings may decrease slightly and proportionally with each other.
  • the change in rpm speed is also dependent on the wheel's coefficient of friction with the running surface and the respective part of the wheel that is in contact with the running surface at the respective angle of contact.

Landscapes

  • Toys (AREA)

Abstract

L'invention concerne un véhicule radio-commandé (1) comportant plus de deux roues à action gyroscopique (10a, 10b) offrant plus de possibilités de mouvements d'acrobaties et une meilleure stabilité durant le fonctionnement. Le poids total du véhicule par rapport à la masse et à la force gyroscopique combinées pouvant être produites par les roues gyroscopiques à un certain régime de rotation est maintenu dans une gamme de fonctionnement prédéterminée afin de conserver la manoeuvrabilité et la stabilisation améliorées durant le fonctionnement. La réaction de couple de roues ou de paires de roues gyroscopiques opposées produit une gamme dans laquelle les forces/actions provoquant des mouvement acrobatiques sont égales ou supérieures à l'effet gyroscopique créé par les roues respectives. La combinaison de la réaction de couple et des effets gyroscopiques étend le spectre des acrobaties possibles et permet de créer une gamme tout à fait nouvelle d'actions provoquant des acrobaties ne pouvant pas être réalisées avec d'autres jouets radio-commandés.
EP01924286A 2000-03-24 2001-03-23 Vehicule de jeu comportant plusieurs roues a action gyroscopique Withdrawn EP1268023A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US19211700P 2000-03-24 2000-03-24
US192117P 2000-03-24
PCT/US2001/009394 WO2001072391A1 (fr) 2000-03-24 2001-03-23 Vehicule de jeu comportant plusieurs roues a action gyroscopique

Publications (1)

Publication Number Publication Date
EP1268023A1 true EP1268023A1 (fr) 2003-01-02

Family

ID=22708328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01924286A Withdrawn EP1268023A1 (fr) 2000-03-24 2001-03-23 Vehicule de jeu comportant plusieurs roues a action gyroscopique

Country Status (4)

Country Link
EP (1) EP1268023A1 (fr)
JP (1) JP2003527945A (fr)
AU (2) AU5095301A (fr)
WO (1) WO2001072391A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648722B2 (en) * 2001-10-26 2003-11-18 The Obb, Llc Three wheeled wireless controlled toy stunt vehicle
US7329167B2 (en) * 2003-10-24 2008-02-12 Tomy Company, Ltd. Multi-axle running toy and multi-axle running toy set
JP5044716B1 (ja) * 2011-09-20 2012-10-10 株式会社バンダイ 対戦用走行玩具
US11135523B2 (en) 2019-12-20 2021-10-05 Spin Master Ltd. Toy vehicle with selected centre of gravity
USD923110S1 (en) 2019-12-30 2021-06-22 Spin Master Ltd. Toy vehicle
USD952050S1 (en) 2019-12-30 2022-05-17 Spin Master, Ltd. Toy vehicle
US20220314965A1 (en) * 2021-03-31 2022-10-06 Honda Motor Co., Ltd. Systems and methods for stabilizing a vehicle on two wheels

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5479750A (en) * 1977-12-07 1979-06-26 Mabuchi Motor Co Racing car toy
US4892503A (en) * 1987-08-05 1990-01-09 Apollo Corporation Action toy vehicle with controllable auxiliary wheel
US5429543A (en) * 1992-07-31 1995-07-04 Tyco Investment Corp. Vehicle toy
US5727985A (en) * 1994-05-24 1998-03-17 Tonka Corporation Stunt performing toy vehicle
US6024627A (en) * 1997-08-19 2000-02-15 Tilbor; Neil Toy vehicle with gyroscopic action rear wheels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0172391A1 *

Also Published As

Publication number Publication date
WO2001072391A1 (fr) 2001-10-04
AU2001250953B2 (en) 2004-04-08
AU5095301A (en) 2001-10-08
JP2003527945A (ja) 2003-09-24

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