WO-2026095303-A1 - POWERTRAIN OF VEHICLE

WO2026095303A1WO 2026095303 A1WO2026095303 A1WO 2026095303A1WO-2026095303-A1

Abstract

The present invention comprises: a differential which is driven by a motor; drive pinions installed to drive wheels by receiving power from the differential; and ring gears integrally provided in the wheels to engage with the drive pinions to receive power.

Inventors

HYUN, CHUNG HEON

Assignees

현대위아 주식회사

Dates

Publication Date: 20260507
Application Date: 20250829
Priority Date: 20241031

Claims (20)

Differential driven by a motor; A drive pinion installed to drive a wheel by receiving power from the above differential; A ring gear integrally provided on the wheel to receive power by meshing with the drive pinion; A vehicle powertrain characterized by being composed including
In claim 1, The above ring gear is provided on the inner circumference of the wheel; The above driving pinion is in internal mesh with the above ring gear. A vehicle powertrain characterized by
In claim 2, The above driving pinion is engaged with the ring gear at a position lower than the center of the ring gear. A vehicle powertrain characterized by
In claim 3, The rotating shaft of the above motor is equipped with a reduction drive gear; The diffring gear of the above differential externally meshes with the above reduction drive gear to form a reduction gear; The motor is fixed to the axle housing surrounding the above reduction drive gear and differential. A vehicle powertrain characterized by
In claim 4, The above wheel is rotatably supported in a wheel housing; The above wheel housing is connected to the above axle housing through a beam tube; The interior of the beam tube is equipped with a disconnector that switches between a state of transmitting power between the differential and the drive pinion and a state of disconnecting power. A vehicle powertrain characterized by
In claim 5, The above disconnecter is, Inner shaft connected to the above differential; An outer shaft arranged concentrically with the inner shaft and connected to the drive pinion; An inner clutch gear integrally formed on the inner shaft; An outer clutch gear integrally formed on the above outer shaft; A sleeve installed to slide linearly along the axial direction of the inner shaft to switch between a state in which it is engaged with both the inner clutch gear and the outer clutch gear and a state in which it is engaged with only one of them; An actuator configured to allow the above sleeve to slide in a straight line; A vehicle powertrain characterized by being composed including
In claim 6, The above outer shaft is rotatably supported in the above wheel housing. A vehicle powertrain characterized by
In claim 5, The center of the wheel is provided with a center boss formed linearly along the rotational center axis of the wheel; A carrier supporting the center boss is formed in the wheel housing; A center bearing is provided between the carrier and the center boss to support the rotation of the wheel relative to the wheel housing. A vehicle powertrain characterized by
In claim 8, A sealing is installed on the inner outer circumference of the wheel to seal the gap with the wheel housing. A vehicle powertrain characterized by
In claim 8, An outer bearing is installed between the wheel and the wheel housing; A sealing is installed on the outer side of the outer bearing to seal the space between the wheel and the wheel housing. A vehicle powertrain characterized by
In claim 5, The above wheel housing, beam tube, and axle housing are installed to be able to move up and down relative to the vehicle body through a suspension system. A vehicle powertrain characterized by
Differential; A drive pinion installed to rotate by receiving power from the above differential; A ring gear integrally formed on the inner circumference of a wheel to mesh with the above-mentioned driving pinion; A disconnecter provided to interrupt power transmission between the above-mentioned differential and the drive pinion; A vehicle powertrain characterized by being composed including
In claim 12, The inner side of the vehicle body of the above wheel is sealed by a wheel housing; The wheel housing supports the wheel and the drive pinion so that the drive pinion meshes with the ring gear below the center of the ring gear. A vehicle powertrain characterized by
In claim 13, A center bearing is installed between the center of the wheel and the wheel housing, and An outer bearing is installed between the outer edge of the wheel and the wheel housing. A vehicle powertrain characterized by
In claim 14, A center boss extending linearly toward the wheel housing is provided at the center of the wheel; The wheel housing is equipped with a carrier that supports the center boss; The above center bearing is provided between the center boss and the carrier. A vehicle powertrain characterized by
In claim 13, Between the outer edge of the wheel and the wheel housing, a sealing is provided to seal the space between the wheel and the wheel housing. A vehicle powertrain characterized by
In claim 13, The above disconnecter An inner shaft installed to receive power from the above differential; An outer shaft arranged concentrically with the inner shaft and equipped with the driving pinion; An inner clutch gear integrally formed on the inner shaft; An outer clutch gear integrally formed on the above outer shaft; A sleeve installed to slide linearly along the axial direction of the inner shaft to switch between a state in which it is engaged with both the inner clutch gear and the outer clutch gear and a state in which it is engaged with only one of them; An actuator configured to allow the above sleeve to slide in a straight line; A vehicle powertrain characterized by being composed including
In claim 17, The above differential is equipped with a diffring gear; A reduction drive gear connected to a motor meshes with the above-mentioned diffring gear; The above reduction drive gear and defroster gear are enclosed within the axle housing; The above axle housing is connected to the wheel housing through a beam tube that encloses the inner shaft and the outer shaft. A vehicle powertrain characterized by
In claim 18, The above axle housing, beam tube, and wheel housing are installed to be able to move up and down relative to the vehicle body through a suspension system. A vehicle powertrain characterized by
In claim 19, The sleeve constituting the disconnecter is installed within the beam tube so as to be able to slide linearly along the longitudinal direction of the beam tube; The actuator is installed to transmit operating force to the sleeve through an operating slot formed in the beam tube from the outside of the beam tube. A vehicle powertrain characterized by

Description

Vehicle's powertrain The present invention relates to a powertrain of a vehicle, and more specifically, to a technology regarding a powertrain of an electric vehicle. The electric vehicle powertrain includes an e-Axle system, which is an integrated drive module comprising a motor, inverter, reduction gear, differential, etc., and is also referred to as an electric drive module, e-Drive, e-Drivetrain, e-Powertrain, etc. Among the above e-Axle systems, there is a coaxial axle type in which the rotating shaft of the motor is arranged concentrically with the drive shaft. Although the above-mentioned coaxial axle e-Axle system has the advantage of being simple in configuration and lightweight, the rotation axis of the motor and the rotation axis of the drive wheel are positioned coaxially, so the distance between the upper side of the motor and the vehicle body is short, which may cause the motor to come into contact with the vehicle body during a bump of the drive wheel. Therefore, in the case of a vehicle equipped with the above-mentioned coaxial axle type e-Axle system, there is a problem in that it is difficult to lower the height of the vehicle's cargo bed. The matters described above as background technology are intended only to enhance understanding of the background of the present invention and should not be construed as an acknowledgment that they constitute prior art already known to those skilled in the art. FIG. 1 is a configuration diagram illustrating a powertrain of a vehicle according to one embodiment of the present invention, FIG. 2 is a detailed view of the main part of FIG. 1, FIG. 3 is a drawing illustrating another embodiment of the present invention, FIG. 4 is a drawing illustrating another example of an outer bearing arrangement, FIG. 5 is a drawing illustrating another embodiment including a deceleration idler, FIG. 6 is a drawing illustrating another embodiment including a planetary reduction gear. FIG. 7 is a drawing illustrating another embodiment in which the reduction gear is excluded. In describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art may obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification, and do not inherently possess distinct meanings or roles. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. In addition, the term "Unit" or "Control Unit" included in names such as Motor Control Unit (MCU) and Hybrid Control Unit (HCU) is merely a term widely used in naming controllers that control specific vehicle functions, and does not mean a generic function unit. A controller may include a communication device that communicates with other controllers or sensors to control the function it is responsible for, a memory that stores an operating system, logic instructions, and input/output information, and one or more processors that perform judgments, calculations, decisions, etc., necessary for controlling the function it is responsible for. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are given the same reference number, and redundant descriptions thereo