JP-2026076066-A - Vehicle equipment layout

JP2026076066AJP 2026076066 AJP2026076066 AJP 2026076066AJP-2026076066-A

Abstract

[Problem] To provide an on-board equipment arrangement structure that can suppress a decrease in the mountability of on-board equipment, including motors, inverters, and drive pinion shafts, onto a vehicle. [Solution] A vehicle 10 is equipped with a drive pinion shaft 50, a rear differential gear 54, and a pair of rear drive shafts 56, arranged in order from the rear propeller shaft 46 towards the rear wheels 16. The vehicle is equipped with a motor MG that applies power to the rear wheels 16 via the rear differential gear 54, and an inverter 62 that performs power conversion between the battery 60 and the motor MG. In this vehicle equipment arrangement structure 90, the motor MG and the drive pinion shaft 50 are arranged to overlap in a vehicle left-right view, and the inverter 62 and the motor MG are arranged to overlap in a vehicle left-right view, which is also a vehicle horizontal view. [Selection Diagram] Figure 2

Inventors

花田直城
宮崎光史
奥田弘一
後藤慎太郎
杉田昌行
播磨和典
加藤真吾

Assignees

トヨタ自動車株式会社

Dates

Publication Date: 20260511
Application Date: 20241023

Claims (9)

A vehicle having a propeller shaft that transmits power from a power source located on the left and right front wheel side to a left and right rear wheel side, a drive pinion shaft connected to the propeller shaft, a drive pinion gear provided on the drive pinion shaft, a differential having a differential case housing a pair of side gears and a differential pinion that meshes with both of the pair of side gears, and a ring gear provided in the differential case that meshes with the drive pinion gear, and a pair of rear wheel drive shafts connected to the pair of side gears respectively, wherein a motor that applies power to the left and right rear wheels via the differential, and an inverter that performs power conversion between the battery and the motor are mounted, The motor is positioned on the right or left side in the vehicle's left-right direction relative to the drive pinion shaft. In a view of the vehicle from the left to right, a portion of the motor and at least a portion of the drive pinion shaft are arranged to overlap. An on-board equipment arrangement structure in which, in a horizontal view of the vehicle, at least a portion of the inverter and at least a portion of the motor are arranged to overlap.
The in-vehicle equipment arrangement structure according to claim 1, wherein the inverter is positioned relative to the motor on the drive pinion shaft side in the left-right direction of the vehicle.
The inverter is positioned above the drive pinion shaft in the vehicle's vertical direction. The vehicle equipment arrangement structure according to claim 2, wherein, in a view of the vehicle in the vertical direction, at least a portion of the inverter and at least a portion of the drive pinion shaft are arranged to overlap.
The vehicle equipment arrangement structure according to claim 3, wherein the drive pinion shaft is arranged such that its axis of rotation is lower in the vehicle's vertical direction than the axis of rotation of the ring gear.
The arrangement structure for in-vehicle equipment according to any one of claims 2 to 4, wherein the motor is arranged such that the rotation axis of the motor is parallel to the rotation axis of the drive pinion shaft.
The power of the motor is transmitted to the drive pinion shaft via a power transmission member. The arrangement structure for in-vehicle equipment according to claim 5, wherein the power transmission member is positioned on the front side in the longitudinal direction of the vehicle relative to the motor.
The in-vehicle equipment arrangement structure according to claim 1, wherein the inverter is positioned on the rear side in the longitudinal direction of the vehicle relative to the motor.
The vehicle equipment arrangement structure according to claim 7, wherein the motor is positioned with respect to the drive pinion shaft on the right and left sides in the left-right direction of the vehicle, on the side opposite to the side on which the ring gear is provided in the differential case.
The vehicle equipment arrangement structure according to claim 1, wherein, in a horizontal view of the vehicle, at least a portion of the terminal block connected to the power lines of the motor and at least a portion of the motor are arranged to overlap.

Description

This invention relates to an on-board equipment arrangement structure that includes a motor that applies power to a pair of left and right rear wheels via a differential, and an inverter that performs power conversion between the battery and the motor. A vehicle is known that comprises a propeller shaft that transmits power from a power source located on the left and right front wheels to the left and right rear wheels, a drive pinion shaft connected to the propeller shaft, a drive pinion gear provided on the drive pinion shaft, a differential having a case housing a pair of side gears and a differential pinion that meshes with both of those side gears, and a ring gear provided in that case that meshes with the drive pinion gear, and a pair of rear wheel drive shafts connected to each of those side gears. For example, the vehicle described in Patent Document 1 is such a vehicle. The vehicle described in Patent Document 1 is equipped with a motor that applies power to the left and right rear wheels via the differential. Japanese Patent Publication No. 2005-231526 This is a schematic diagram of a vehicle to which the vehicle equipment arrangement structure according to the present invention is applied.This diagram illustrates the general layout of the in-vehicle equipment according to Example 1, where (a) is a view from the top and bottom of the vehicle, (b) is a view from the left and right of the vehicle, and (c) is a view from the front and rear of the vehicle.This diagram illustrates the general layout of the in-vehicle equipment arrangement according to Example 2, where (a) is a view from the top and bottom of the vehicle, (b) is a view from the left and right of the vehicle, and (c) is a view from the front and rear of the vehicle.This diagram illustrates the general layout of the in-vehicle equipment according to Example 3, where (a) is a view from the top and bottom of the vehicle, (b) is a view from the left and right of the vehicle, and (c) is a view from the front and rear of the vehicle. The following describes in detail each embodiment of the present invention with reference to the drawings. Note that the drawings in each embodiment have been simplified or modified as appropriate, and the dimensional ratios and shapes of each part are not necessarily depicted accurately. In this specification, "vehicle longitudinal direction," "vehicle lateral direction," and "vehicle vertical direction" refer to the directions when the on-board equipment is mounted on the vehicle. "Vehicle longitudinal direction" is the longitudinal direction of the vehicle. "Vehicle lateral direction" is the lateral direction of the vehicle, i.e., the vehicle width direction, which is perpendicular and horizontal to the vehicle longitudinal direction. "Vehicle vertical direction" is the direction of the vertical line, i.e., the height direction. "Vehicle longitudinal view" means looking from the front to the rear or from the rear to the front in the vehicle longitudinal direction. "Vehicle lateral view" means looking from the left to the right or from the right to the left in the vehicle lateral direction. "Vehicle vertical view" means looking from the top to the bottom or from the bottom to the top in the vehicle vertical direction. "Vehicle horizontal view" means looking in a direction parallel to a horizontal plane perpendicular to the vehicle vertical direction. "When viewed from the left or right direction of the vehicle, one configuration and another configuration overlap" means that when viewing from one configuration towards another in the left or right direction of the vehicle, or when viewing from another configuration towards one configuration in the left or right direction of the vehicle, those configurations overlap. "When viewed from the horizontal direction of the vehicle, one configuration and another configuration overlap" means that when viewing from one configuration towards another in the horizontal direction of the vehicle, or when viewing from another configuration towards one configuration in the horizontal direction of the vehicle, those configurations overlap. "When viewed from the vertical direction of the vehicle, one configuration and another configuration overlap" means that when viewing from one configuration towards another in the vertical direction of the vehicle, or when viewing from another configuration towards one configuration in the vertical direction of the vehicle, those configurations overlap. "When viewed from the front or rear direction of the vehicle, one configuration and another configuration overlap" means that when viewing from one configuration towards another in the front or rear direction of the vehicle, those configurations overlap.