Rigid axle drive system

Abstract

The present invention relates to an axle (1) for a trailer-type mobility device, and the associated mobility device, comprising two wheels (2), a central shaft (3), at least one electric motor (4) and at least one clutch (5), the motor (4) and the clutch being arranged on the central shaft (3). Figure for abstract: Fig.1.

Description

Title of the invention: Rigid axle drive system

[0001] The present invention relates to a rigid axle drive system, and more particularly to a rigid axle drive system with a coupling device for a mobility device.

[0002] Motorization systems for rigid axles are already known. The motorization is done for example with an electric motor. However, these known systems do not allow independent controls of the two wheels associated with the axle.

[0003] The invention therefore aims to overcome these drawbacks of the prior art by proposing an improved rigid axle motorization system.

[0004] For this purpose, the present invention proposes an axle for a mobility device comprising two wheels, a central shaft, at least one electric motor and at least one clutch,

[0005] the motor and the clutch being arranged on the central shaft.

[0006] Such a configuration makes it possible to motorize an axle electrically simply. The axle motorization is thus independent.

[0007] According to one embodiment of the invention, the central shaft is formed by two transmission shafts, each transmission shaft being associated with a wheel.

[0008] According to one embodiment of the invention, the clutch is controlled to allow its opening and / or closing.

[0009] According to one embodiment of the invention, the motor is a concentric motor arranged around the axle shaft.

[0010] According to one embodiment of the invention, the reducer is a concentric reducer arranged around the axle shaft.

[0011] According to one embodiment of the invention, the axle comprises two electric motors, the clutch being arranged between the two motors.

[0012] According to one embodiment of the invention, the axle comprises two clutches, the motor being arranged between the two clutches.

[0013] The invention also relates to a mobility device comprising at least one axle according to the invention.

[0014] According to one embodiment of the invention, the mobility device comprises two axles each comprising at least one motor.

[0015] According to one embodiment of the invention, the mobility device comprises two axles each comprising two motors.

[0016] Other aims, characteristics and advantages of the invention will be better understood and will appear more clearly on reading the description given below, with reference to the appended figures, given by way of example and in which: - [Fig.l] is a representation of a motorization system according to a first embodiment of the invention, - [Fig.2] is a representation of a motorization system according to another embodiment of the invention, - [Fig.3] is a representation of a motorization system according to another embodiment of the invention, - [Fig.4] is a representation of a motorization system according to another embodiment of the invention, - [Fig.5] is a representation of a motorization system according to another embodiment of the invention, - [Fig.6] is a representation of a motorization system according to another embodiment of the invention.

[0017] [Fig.l] illustrates a rigid axle 1 of a mobility device 10 according to an embodiment of the invention.

[0018] The mobility device 10 is a device with at least two wheels, for example a motorcycle, a motor vehicle, a passenger motor vehicle, a trailer or a caravan. The device comprises at least one rigid axle and, for example, two axles

[0019] In the context of the invention, the rigid axle 1 comprises two wheels 2, a central shaft 3, at least one electric motor 4 and at least one clutch 5. The motor 4 and the clutch are arranged on the shaft 3. Each of the wheels 2 is arranged at a different end of the shaft 3.

[0020] According to one embodiment, the central shaft 3 is formed by two transmission shafts 31, each transmission shaft 31 being associated with a wheel 2.

[0021] According to one embodiment of the invention, the clutch 5 is controlled to enable it to be opened and / or closed. In the open mode, the clutch is disconnected, which enables the operation of the elements arranged on either side to be separated. In the closed mode, the clutch is connected, which enables the elements arranged on either side to be operated together.

[0022] According to one embodiment of the invention, the motor 4 comprises a reducer 41 with at least one output.

[0023] According to one embodiment of the invention, the motor 4 is a concentric motor arranged around the shaft 3 of the axle 1. Such a motor allows the axle to be more compact.

[0024] According to one embodiment of the invention, the reducer 41 is a concentric reducer arranged around the shaft 3 of the axle 1. Such a reducer 41 allows the axle to be more compact.

[0025] According to one embodiment of the invention, the motor 4 and the reducer are concentric and are arranged side by side around the shaft 3 of the axle 1. Such configuration with a concentric motor and reducer allows the axle to be more compact.

[0026] According to one embodiment of the invention, the electric motor 4 is a wheel motor.

[0027] According to one embodiment, the clutch 5 is arranged between the motor 4 and one of the two wheels 2 on the shaft 3 of the axle 1.

[0028] This configuration with a 4 engine and a 5 clutch is used with the clutch closed when the machine is traveling in a straight line, and with the clutch open when traveling in bends. Opening the clutch, that is to say disconnecting one of the wheels from the engine, makes it possible to manage the speed, and to optimize the traveling in bends.

[0029] According to one embodiment of the invention, the axle comprises two electric motors 4 [Fig. 2]. The clutch 5 is arranged between the two motors 4. That is to say that the two motors 4 are arranged on either side of the clutch, and for example each on a transmission shaft 31 of the axle 1.

[0030] In this configuration with two motors 4 and a clutch 5, the clutch is closed when the machine is traveling in a straight line. When traveling in a bend, the clutch is open. The motors then adapt their torque to each wheel to optimize the rolling of the machine in a bend and to allow turning on the spot. Indeed, when turning on the spot it is necessary for the motors to operate in opposite directions, this is possible thanks to the opening of the clutch. In this configuration with two motors per axle, the system also makes it possible to compensate for the failure of one motor and to continue to provide propulsion.

[0031] According to one embodiment of the invention, the axle comprises two clutches 5 [Fig. 3]. The motor 4 is arranged between the two clutches 5. That is to say that the two clutches 5 are arranged on either side of the motor 4, and for example, each on a transmission shaft 31 of the axle 1.

[0032] The invention also relates to a mobility device comprising at least two axles 1.

[0033] According to an embodiment of the invention illustrated [Fig.4], when the mobility device comprises at least two axles 1, the motor 5 and reduction gear 41 assemblies of each axle 1 are mounted opposite to the clutch 5, when the axle only comprises a single motor. This configuration with two axles and one motor per opposite axle makes it possible to optimize cornering.

[0034] According to one embodiment of the invention, the machine comprises two axles comprising two motors 4 and at least one clutch 5.

[0035] According to one embodiment of the invention, when the machine comprises two axles 1, one of the two axles serves to lift the other illustrated [Fig.6]. This makes it possible to use only one axle at a time and thus save energy and limit wear on the wheels, or wheel tires. Lifting also makes it easier to maneuver the machine on slopes or climbs.

[0036] According to one embodiment of the invention, when the machine comprises two axles 1, the two axles 1 operate to move the machine 10 forward [Fig.5] a) or only one of the two operates [Fig.5] b) c).

[0037] The invention also relates to a trailer or caravan comprising at least one axle 1. Such a trailer or caravan with a motorized axle system with at least one electric motor allows the machine to move forward autonomously. For example, to be driven independently of the vehicle, which allows it to be maneuvered more easily, and in particular to be parked alone.

[0038] The presence of two clutches 5 for a trailer axle makes it possible to completely uncouple the engine, thus preventing it from having an overspeed when it is moving forward by towing with the vehicle.

[0039] The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claims supported by the description.

Claims

Claims

1. Axle (1) for a mobility device (10) comprising two wheels (2), a central shaft (3), at least one electric motor (4) and at least one clutch (5), characterized in that the motor (4) and the clutch are arranged on the central shaft (3).

2. Axle (1) according to claim 1, wherein the central shaft (3) is formed by two transmission shafts (31), each transmission shaft (31) being associated with a wheel (2).

3. Axle (1) according to claim 1 or 2 in which the clutch is controlled to allow its opening and / or closing.

4. Axle (1) according to one of claims 1 to 3, wherein the motor (4) is a concentric motor arranged around the shaft (3) of the axle 1.

5. Axle (1) according to one of claims 1 to 4, wherein the reducer (41) is a concentric reducer arranged around the shaft (3) of the axle (1).

6. Axle (1) according to one of claims 1 to 5, comprising two electric motors (4), the clutch (5) being arranged between the two motors (4).

7. Axle (1) according to one of claims 1 to 5, comprising two clutches (5), the motor (4) being arranged between the two clutches (5).

8. Mobility machine (10) comprising at least one axle according to one of claims 1 to 7.

9. Mobility machine (10) according to claim 8, comprising two axles (1) each comprising at least one motor.

10. Mobility device according to claim 8, comprising two axles (1) each comprising two motors (4).

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