FR2811585A1 - Roller skate has drive power provided by hinged and spring-loaded sole plate, hydraulic cylinder and motor - Google Patents

Abstract

The roller skate has a spring-loaded sole plate (1) pivoted at its forward end to the roller assembly (2, 3), and a system for converting a downward pressure applied to the side plate into drive energy. The system comprises a hydraulic cylinder (7) with its piston connected to the roller assembly and linked via a hydraulic circuit to a hydraulic motor (8) driving at least one of the rollers.

Description

The present invention relates to a self-rolling roller skate

  driven. This shoe includes a shoe part for placing the feet and a rolling part in connection with the ground articulated on the shoe part.

  The rolling part includes several casters.

  The invention will find its application particularly in the field of roller skates in line or in pairs and

  comprising means for self-training of the skate.

  By this is meant that the physical effort produced by the user will allow the skates to be set in motion by

  driving at least one of their rollers.

  The invention can also be applied to walking shoes provided with a sole forming a treadmill preferably wider and more stable than a conventional roller skate. It is, however, still a roller type skate since o casters, for example, quite wide

  will be present for training the mat.

  We know from document US-A-5,797,466 a roller skate

  of the inline roller type with a small combustion engine.

  The motor shaft drives, by power transmission by

  a reduction gear train, the skate wheels.

  This type of design has various disadvantages.

  Firstly, it uses a combustion engine which requires non-renewable energies such as petrol and

  which causes significant noise.

  Furthermore, combustion engines are bulky

  even when they are reduced in size.

  They require regular maintenance and pose

reliability issues.

  Consequently, this type of motorization does not give

full satisfaction.

  Document DE-A-3,436,836 has proposed a pad powered by the energy developed by the user during his

skating movements.

  According to this document, a special drive wheel is formed as well as a highly mechanized rack system for

  transmit energy from the shoe to the wheels.

  A spring is also used for the accumulation of

  the energy produced by the user.

  A disadvantage of this skate is that it has only one

  very special and heavy mechanical system.

  Thus, it implements an additional wheel which is not very advantageous in terms of weight and size, especially if

wants to compose an inline skate.

  What is more, the additional drive wheel poses

maneuverability issues.

  In addition, this skate has a transmission system

  and bulky energy accumulation.

  The choice of a mechanical drive requires a particular articulation of the skate at the two ends of

  this one (at the tip and at the heel).

  Consequently, such a skate is also not entirely satisfactory, given that it remains of heavy design and

  cumbersome without being particularly effective.

  The invention overcomes the drawbacks of

current systems.

  Thus, the pad proposed here is significantly lighter and

  less bulky than those known so far.

  Its drive system is therefore easier to incorporate into existing skates or requires only

minor adaptations.

  In addition, it has the advantage of implementing hydraulic drive means which are both more reliable and of ecological functioning more compatible with employment.

usual roller skates.

  Thus, the operating noise is greatly reduced and

  the energy used is completely renewable.

  Other goals and advantages will emerge during the

  description which follows which is however given only as

  indicative and which is not intended to limit it.

  The present invention relates to a self-rolling roller skate

  driven comprising a shoe part articulated on a rolling part in connection with the ground and provided with several casters, and means for transmitting the force of support of the user on the skate in driving force for at least one caster, characterized by the fact that it comprises: - at the front of the shoe, an articulation allowing the pivot of the shoe part with respect to the rolling part, - a hydraulic jack whose piston is integral with the shoe part and the body integral of the rolling part, said cylinder supplying a hydraulic motor with a hydraulic motor driving at least

a roulette.

  The roller skate according to the invention may be presented in the embodiments set out below:

  - the cylinder is mounted at the heel of the skate.

  - the cylinder body is pivotally mounted on the end

rear of the bearing part.

  - the output shaft of the hydraulic motor is mounted

  directly on the axis of one of the casters.

  - it includes a return spring interposed between the

  rolling part and shoe part.

  - The hydraulic circuit includes a fluid reservoir.

  - the tank is a flexible pocket hugging the back of

the shoe part.

  - the hydraulic circuit includes: - a working track connecting the outlet of the jack and the inlet of the hydraulic motor, - a return track between the outlet of the hydraulic engine and the tank, - an inlet track between the tank and the entry of the jack. - the hydraulic circuit includes a freewheeling circuit connecting the inlet and the outlet of the hydraulic motor by means of a non-return valve allowing the passage of the fluid

  from the outlet to the inlet of the hydraulic motor.

  - the working track includes a distributor capable, on user command, of supplying a track

  secondary activation of a braking device.

  The attached drawings are given as indicative and non-limiting examples. They represent a preferred embodiment according to the invention. They will allow

easily understand the invention.

  Figure 1 shows schematically the formation of a shoe part and a rolling part in the roller skate according to

  the invention in a particular embodiment.

  Figure 2 illustrates the hydraulic circuit used

  in the present invention for driving the skate.

  As can be seen from FIG. 1, the shoe presented here comprises a shoe part 1 articulated on a rolling part 2 in connection with the ground by means of

multiple casters 3.

  The shoe part 1 essentially has the function of

receive the user's foot.

  A hinge 6 is preferably present at the front of the shoe to allow the relative pivot of the part

  shoe 1 on the running part 2.

  A pivot of current design in particular by an axis may

  be implemented in articulation 6.

  Dotted is a position taken from the

  shoe part 1 and solid lines in a lowered position.

  To move from the raised position to the lowered position, the pressure exerted by the user on the

  shoe during its skating movement.

  To exploit the support force exerted by the user, the shoe according to the invention comprises a hydraulic cylinder 7, the piston 9 of which is integral with the shoe part 1 and the

  body 10 is integral with the rolling part 2.

  This configuration is shown in Figures 1 and 2.

  More specifically, Figure 2 shows that the hydraulic cylinder 7 supplies a hydraulic motor 8 by

  through a hydraulic circuit.

  The output shaft of the hydraulic motor 8 can then

  drive one or more of the rollers 3.

  Preferably, this training takes place directly

on the axis of one of the casters.

  Thus, the output shaft of the hydraulic motor 8 is mounted

on the axis 11 of a caster 3.

  However, as shown in Figure 1, other embodiments are possible. In particular, the output shaft of the hydraulic motor 8 can be applied to the surface of

  rolling of a caster 3 to drive it by friction.

  Preferably in order to take full advantage of the spacing amplitude between the shoe part 1 and the running part 2, the jack 7 is mounted at the level

heel 5 of the skate.

  Furthermore, to follow the rotational movement around the articulation 6, the body 10 of the jack 7 will preferably be pivotable on the rear end of the

bearing part 2.

  Still preferably, a return spring 12 is used to assist in raising the shoe part 1

  when the user no longer exerts a pressing force.

  A compression spring sized for this purpose may

be used in this setting.

  FIG. 1 shows that this spring can be positioned in compression between the rolling part 2 and the part

shoe 1.

  The invention has the advantage of exploiting the possibilities of a

S hydraulic design.

  In this context, Figure 2 shows an embodiment

  preferred circuit that will be implemented.

  More particularly, the hydraulic circuit will include a fluid reservoir 13 supplying the entire circuit

hydraulic.

  Preferably, the reservoir is a flexible pocket which

  can marry the back of the shoe part 1.

  However, the reservoir 13 can also be integrated into the

bearing part 2.

  The different pipes of the hydraulic circuit can be made using hoses which will have the advantage of being

light and space-saving.

  Furthermore, preferably, the hydraulic circuit comprises a working track 14 connecting the outlet 18 of the jack 7

  and the inlet 19 of the hydraulic motor 8.

  To avoid any return of fluid to the cylinder 7, the track

  working 14 may include a non-return valve 25.

  Furthermore, the hydraulic circuit will include a return path 15 between the outlet 20 of the hydraulic motor 8 and the

tank 13.

  Similarly, the reservoir 13 is connected to the inlet 17 of the jack 7

through an admission route 16.

  This will preferably include a check valve

  return 26 to avoid any return of fluid to the reservoir 13. To allow more flexibility of use, it is advantageous to constitute a hydraulic freewheel in the circuit. Indeed, for example when going downhill, it may be useful not to operate the hydraulic motor 8 in relation to the jack 7 because it would require more fluid flow.

  that the cylinder would not be able to provide.

  To constitute this freewheel, the input 19 of the hydraulic motor 8 and its output 20 will be linked

  through a non-return valve 22.

  This will only allow the passage of the fluid in the direction

exit 20 / entry 19.

  A hydraulic design such as that proposed according to the invention also has the advantage of allowing the combined operation of the drive system with

accessory elements.

  Thus, a braking member 27 can be formed and exploit the energy developed by the user and transformed

in hydraulic energy.

  To this end, the braking member 27 can be supplied by a secondary path 23 also connected to the outlet 18 of the jack 7. To allow the switching of the working path 14 either to the secondary path 23 or to the hydraulic motor 8 ,

  a dispenser may be used.

  A distributor 24 as identified in FIG. 2 and of common design with two outlet channels can be set up.

artwork.

  As regards the braking member 27, it may be a second cylinder whose piston may be applied

indirectly on one of the wheels.

  Of course, the fluid used in the hydraulic circuit according to the invention may be of various types but will be

  preferably consisting of oil.

  Finally, the skate thus described could be applied to the formation of a walking shoe in which the rolling part 2 is provided with a treadmill capable of being put in

movement by the effort of the walker.

  As before, the training will be carried out by one or more rollers, of width adapted to the treadmill. For example, two casters will be present, one at the front and the other, powered, at the rear, to drive the

carpet around their perimeter.

REFERENCES

  1. Shoe part 2. Tread part 3. Casters 4. Castor support band 5. Heel 6. Articulation 7. Hydraulic cylinder 8. Hydraulic motor 9. Piston 10. Cylinder body 11. Axle of a caster 12. Return spring 13. Fluid reservoir 14. Working track 15. Return track 16. Inlet track 17. Cylinder inlet 18. Cylinder outlet 19. Motor inlet 20. Motor outlet 21. Freewheel circuit 22. Freewheel valve 23. Secondary track 24. Distributor, 26. Non-return valve 27. Braking device 28. Braking device return route I w 2811585

Claims (10)

  1. Self-driving roller skate comprising a shoe part (1) articulated on a rolling part (2) in connection with the ground and provided with several rollers (3), and means for transmitting the bearing force of the user on the skate in driving force for at least one caster, characterized in that it comprises: - at the front of the skate, an articulation (6) allowing the pivot of the shoe part (1) relative to the rolling part (2), - a hydraulic cylinder (7) whose piston (9) is integral with the shoe part (1) and the body (10) integral with the rolling part (2), said cylinder (7 ) supplying a motor with a hydraulic circuit   hydraulic (8) driving at least one caster.   2. Self-driven roller skate, according to claim 1, characterized in that the jack (7) is mounted at the heel (5) of the skate. 3. Self-driving roller skate, according to claim 1, characterized in that the body (10) of the jack (7) is pivotally mounted on   the rear end of the bearing part (2).   4. Self-powered roller skate according to any one   of claims 1 to 3, characterized by the fact   that the output shaft of the hydraulic motor (8) is mounted   directly on the axis of one of the casters.   5. Self-powered roller skate according to any one   of claims 1 to 4 characterized by the fact   that it comprises a return spring (12) interposed between   the rolling part (2) and the shoe part (1).   6. Self-powered roller skate according to any one   of claims 1 to 5, characterized by the fact   that the hydraulic circuit includes a fluid reservoir (13). 7. Self-driven roller skate according to claim 6, characterized in that the reservoir (13) is a flexible pocket matching the back of the shoe part.   8. Self-driven roller skate according to claim 6 or 7, characterized in that the hydraulic circuit comprises: - a working track (14) connecting the outlet (18) of the jack (7) and the inlet (19 ) of the hydraulic motor (8), - a return path (15) between the outlet (20) of the hydraulic motor (8) and the reservoir (13), - an intake path (16) between the reservoir (13) and the inlet (17) of the jack (7).   9. Self-driven roller skate according to claim 8, characterized in that the hydraulic circuit comprises a free wheel circuit (21) connecting the inlet (19) and the outlet (20) of the hydraulic motor (8) by through a non-return valve (22) allowing the passage of the fluid only from the outlet (20) to   the inlet (19) of the hydraulic motor.   10. Self-powered roller skate according to any one   claims 8 or 9, characterized in that   that the working track (14) comprises a distributor (24) capable, on command of the user, of supplying a track   secondary (23) activation of a braking member (27).