Gearbox adaptable to multiple configurations of electric or hybrid vehicles

Abstract

The invention relates to a gearbox (1) for regulating the speed and torque of an electric motor in an electric or hybrid motor vehicle, characterized in that said gearbox (1) comprises an upper support (2) and a lower support (3), the upper support (2) having a substantially parallelepiped shape, the upper support (2) having at least one first mounting opening (7), the lower support (3) having a substantially cylindrical shape having a second mounting opening (6), said upper support (2) being capable of being covered by a first complementary support, said lower support (3) being capable of being covered by a second complementary support. The gearbox (1) can thus be adapted to a tricycle or quadricycle motor vehicle. Figure 1

Description

Title of the invention: REDUCER ADAPTABLE TO MULTIPLE CONFIGURATIONS OF ELECTRIC OR HYBRID VEHICLES

[0001] The invention relates to the reduction gears of the powertrain groups of electric or hybrid vehicles.

[0002] Prior art patent application WO2021136698 is known, describing a powertrain for a vehicle, said powertrain comprising an electric motor with stator and rotor, an output shaft connected to the motor, and a gearbox adapted to reduce the motor's power. The gearbox is housed in a casing having an axis of symmetry. The gearbox includes connecting members that attach to the output shaft at one of its lateral ends. The gearbox has two connecting members located on either side of the axis of symmetry, further facilitating assembly. In addition, the gearbox includes two connecting members for linking the gearbox to wheels, located on either side of the axis of symmetry. An inverter is integrated to control the electric motor. The motor pivots about its axis so as to present three distinct positions, each 120° from the others. However, a drawback remains.Patent application WO2021136698 proposes a specific reduction gear configuration, which is therefore suitable for a vehicle with a particular configuration. If the vehicle has a different configuration, it will be necessary to modify the reduction gear configuration. Therefore, it will be necessary to change the reduction gear.

[0003] The objective of the present invention is to remedy these drawbacks and to provide a reducer that can be adapted to vehicles with various configurations.

[0004] To achieve this objective, the invention proposes a reducer for regulating the speed and torque of an electric motor of an electric or hybrid motor vehicle, remarkable in that said reducer comprises an upper support and a lower support, the upper support having a substantially parallelepiped shape, the upper support having at least one first fixing opening, the lower support having a substantially cylindrical shape having a second fixing opening, said upper support being able to be covered by a first complementary support, said lower support being able to be covered by a second complementary support.

[0005] Thanks to the invention, a single reducer can change its configuration by adding the first complementary support and the second complementary support so as to adapting to the configuration of the vehicle on which it is mounted. This reduces the production cost of the gearboxes and facilitates their installation in vehicles.

[0006] Advantageously, the upper support and the lower support are positioned on either side of said reducer.

[0007] This allows the load on the reducer held by the upper support and the lower support to be balanced.

[0008] The invention also relates to an electric or hybrid tricycle motor vehicle comprising a powertrain, said powertrain comprising an electric motor and an axle notable in that said powertrain comprises the reduction gear described above, the upper support being covered by the first complementary support, the lower support being covered by the second complementary support, the first complementary support and the second complementary support each being fixed to the axle of said vehicle.

[0009] Advantageously, the first additional support is fixed to the upper support by means of at least one fixing screw in said at least one first fixing opening.

[0010] Advantageously, the second supplementary support is fixed to the lower support by means of a fixing screw, said fixing screw being inserted into said second fixing opening.

[0011] The fixing screws allow for efficient and quick tightening assembly.

[0012] Advantageously, the upper support has a substantially parallelepiped male shape, the first complementary support having a female counter-shape.

[0013] This facilitates the mounting of the first additional support on the upper support.

[0014] Preferably, the second supplementary support comprises a first part and a second part, the first part being substantially perpendicular to the second part, the second part being in contact with the lower support, the second part having at least one third fixing opening, said opening being positioned opposite the second fixing opening, the fixing screw passing through said third fixing opening and said second fixing opening.

[0015] Furthermore, the invention relates to an electric or hybrid quadricycle motor vehicle comprising a powertrain, said powertrain comprising an electric motor and an axle notable in that said powertrain comprises the reduction gear described above, said upper support and said lower support each being fixed on the axle of said vehicle.

[0016] The invention will be further detailed by describing non-limiting embodiments, and based on the accompanying figures illustrating variants of the invention, in which: - [Fig. 1] schematically illustrates a reducer of a powertrain of an electric or hybrid vehicle according to an embodiment of the invention; - [Fig.2] schematically illustrates, from a first viewpoint, the reducer illustrated in [Fig.1] comprising a first complementary support and a second complementary support; - [Fig.3] schematically illustrates, from a second viewpoint, the reducer illustrated in [Fig.2].

[0017] A reduction gear 1 of a powertrain for an electric or hybrid tricycle or quadricycle motor vehicle, i.e., a vehicle with three or four wheels respectively, is schematically illustrated in [Fig. 1], as well as in [Fig. 2] and [Fig. 3]. Furthermore, the powertrain includes an electric motor. The reduction gear 1 is a mechanical component that reduces the rotational speed of the electric motor and increases the torque before the rotation is transmitted to the wheels via a drive shaft. In addition, the vehicle includes an axle, which is a rigid structure supporting the weight of the vehicle's components. The axle is in contact with the wheels. The reduction gear 1 has an upper support 2 and a lower support 3. The upper support 2 has a substantially parallelepiped shape. Moreover, the upper support 2 has at least one first mounting opening 7. In [Fig.[l], the upper support 2 has two initial openings 7. The lower support 4 has a substantially cylindrical shape with a second mounting opening 6. [Fig. l] illustrates the gearbox 1 in a quadricycle motor vehicle. The upper support 2 and the lower support 3 are in direct contact with the axle so as to fix said gearbox 1 to the axle of the vehicle. The upper support 2 is shown in particular in [Fig. l]. The upper support 2 is responsible for fixing said gearbox 1 to the axle in a first vertical direction oriented away from the ground. Conversely, the lower support 3 is responsible for fixing said gearbox 1 to the axle in a second vertical direction oriented towards the ground. Preferably, the upper support 2 and the lower support 3 are positioned on either side of the gearbox 1.This allows the loads on the reducer 1 to be balanced between the upper support 2 and the lower support 3. This improves the attachment of the reducer 1 to the axle. Therefore, the reducer 1 is suitable for installation in a tricycle motor vehicle. Currently, there are many different reducers 1 available, varying in shape and / or arrangement within the vehicle. Technicians... Those responsible for mounting gearboxes 1 in vehicles must therefore learn several mounting methods, as these vary depending on the shape and / or arrangement of the gearbox 1. Furthermore, in after-sales service, it is necessary to maintain a large stock of several types of gearboxes 1 in case the gearbox 1 of a given vehicle needs replacing. Therefore, for economic and logistical reasons, it is advisable to develop a gearbox 1 suitable for all types of vehicles. Figures 2 and 3 represent the gearbox 1 in a tricycle. The upper support 2 is covered by a first complementary support 4. Preferably, the upper support 2 has a roughly parallelepiped-shaped male form, while the first complementary support 4 has a female counterform, so that the upper support 2 fits easily into the first complementary support 4.This reduces the risk of unwanted displacement of the first auxiliary support 4 when it is not yet fixed to the upper support 2, for example, during the mounting or replacement of the reduction gear 1. During the mounting or replacement of the reduction gear 1, the first auxiliary support 4 is fixed to the upper support 2, preferably by tightening with fixing screws and, optionally, washers, so as to change the configuration of the reduction gear 1 so that it can be fixed to the vehicle axle. Similarly, the lower support 3 is covered by a second auxiliary support 5 to change the configuration of the reduction gear 1 and allow its installation in a given type of vehicle. The first auxiliary support 4 and the second auxiliary support 5 are each fixed to the axle of the tricycle.Optionally, the first supplementary support 4 is attached to the upper support 2 by means of at least one fixing screw in said at least one first fixing opening 7. Preferably, a fixing screw also allows the gearbox to be attached to the axle. Preferably, the second supplementary support 5 is attached to the lower support 3 by means of a fixing screw positioned in said second fixing opening 6 as shown in [Fig. 2]. The cylindrical shape of the lower support 3 surrounding said second fixing opening 6 makes it easy for the technician to guide the attachment of the second supplementary support 5 to the lower support 3. Optionally, as illustrated in [Fig. 3], the second supplementary support 5 has a first part 5a and a second part 5b. The first part 5a is substantially perpendicular to the second part 5b.The second part 5b has at least one third fixing opening positioned opposite the second fixing opening 6, the second part 5b being in contact with the lower support 3. The fixing screw allows the fixing. from the second supplementary support 5 to the lower support 3 passes through the third fixing opening and the second fixing opening 6.

Claims

Demands

1. Gear reducer (1) for regulating the speed and torque of an electric motor of an electric or hybrid motor vehicle, characterized in that said gear reducer (1) comprises an upper support (2) and a lower support (3), the upper support (2) having a substantially parallelepiped shape, the upper support (2) having at least one first fixing opening (7), the lower support (3) having a substantially cylindrical shape comprising a second fixing opening (6), said upper support (2) being capable of being covered by a first complementary support (4), said lower support (3) being capable of being covered by a second complementary support (5).

2. Reducer (1) according to claim 1 characterized in that the upper support (2) and the lower support (3) are positioned on either side of said reducer (1).

3. Electric or hybrid tricycle motor vehicle comprising a powertrain, said powertrain comprising an electric motor and an axle characterized in that said powertrain comprises the reduction gear according to claim 1 or 2, the upper support (2) being covered by the first complementary support (4), the lower support (3) being covered by the second complementary support (5), the first complementary support (4) and the second complementary support (5) each being fixed to the axle of said vehicle.

4. Tricycle motor vehicle according to claim 3 characterized in that the first supplementary support (4) is fixed to the upper support (2) by means of at least one fixing screw in said at least one first fixing opening (7).

5. Tricycle motor vehicle according to claim 3 or 4 characterized in that the second supplementary support (5) is fixed to the lower support (3) by means of a fixing screw, said fixing screw being inserted into said second fixing opening (6).

6. A tricycle motor vehicle according to any one of claims 3 to 5 characterized in that the upper support (2) presents a male form that is substantially parallelepiped-shaped, the first complementary support (4) presenting a female counterform.

7. Tricycle motor vehicle according to any one of claims 3 to 6 characterized in that the second supplementary support (5) comprises a first part (5a) and a second part (5b), the first part (5a) being substantially perpendicular to the second part (5b), the second part (5b) being in contact with the lower support (3), the second part (5b) comprising at least one third fixing opening, said opening (5c) being positioned opposite the second fixing opening (6), the fixing screw passing through said third fixing opening and said second fixing opening (6).

8. Electric or hybrid quadricycle motor vehicle comprising a powertrain, said powertrain comprising an electric motor and an axle characterized in that said powertrain comprises the reduction gear according to claim 1 or 2, said upper support (2) and said lower support (3) each being fixed on the axle of said vehicle.

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