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In-wheel motor drive device

An in-wheel motor and driving device technology, which is applied to electric power devices, gear transmission devices, electro-mechanical devices, etc., can solve the problems such as the need for cooling water, the increased weight of the in-wheel motor driving device, and the deterioration of the followability of the suspension device, so as to improve the ride quality. Comfort performance, effect of reducing unsprung weight

Active Publication Date: 2015-03-11
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned conventional in-wheel motor driving device, there is room for improvement as described below.
In other words, there are problems in that not only must a separate cooling water channel be provided, but also cooling water is required, the weight of the in-wheel motor drive device increases, and the followability of the suspension device deteriorates.

Method used

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  • In-wheel motor drive device
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Examples

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Embodiment Construction

[0038] Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings. figure 1 It is a longitudinal sectional view showing the in-wheel motor driving device as the first embodiment of the present invention. figure 2 yes figure 1 Sectional view of II-II. image 3 yes figure 1 Side view of an in-wheel motor drive unit. Figure 4 is viewed from the axis figure 1 Front view of the in-wheel motor drive unit. Figure 5 is has figure 1 A top view of an in-wheel motor drive unit for an electric vehicle. Image 6 yes Figure 5 Rear sectional view of an electric motor vehicle.

[0039] refer to Figure 5 , The electric vehicle 11 has: a chassis 12; a front wheel 13 as a steering wheel; a rear wheel 14 as a driving wheel; refer to Image 6 The rear wheel 14 is housed inside the wheel house 12a of the chassis 12, and is fixed to the lower portion of the chassis 12 via a suspension device (suspension) 12b.

[0040] The su...

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Abstract

This air-cooled type in-wheel motor drive assembly 21 includes a lubrication oil circuit for lubricating a speed reduction unit B by allowing lubrication oil discharged from a lubrication oil pump 51 to flow through interconnected oil passages 54, 55, 56 provided to a casing 22, motor-rotary-shaft oil passage 57, speed-reduction-unit input-shaft oil passage 58 and interior of the speed reduction unit B, and for cooling a motor unit A and the speed reduction unit B with the lubrication oil cooled with the aid of outer fins 22f while flowing through the oil passages 54, 55, 56 provided to the casing.

Description

technical field [0001] The present invention relates to an in-wheel motor drive device used as a power source of a vehicle, in which a rotating shaft of a motor is connected to a hub of a wheel via a reduction gear. Background technique [0002] A conventional in-wheel motor driving device is described in, for example, Japanese Unexamined Patent Publication No. 2009-63043 (Patent Document 1). The in-wheel motor drive device described in Patent Document 1 includes a motor unit, a deceleration unit, a wheel hub, and a deceleration unit lubricating mechanism for supplying lubricating oil to the deceleration unit. In addition, a cooling water channel and a radiator are provided in the casing of the motor unit. In addition, the motor unit is cooled by flowing cooling water through the cooling water passage. [0003] 【Prior technical literature】 [0004] 【Patent Literature】 [0005] [Patent Document 1] Japanese Unexamined Patent Publication No. 2009-63043 (page 8, first drawin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K7/00F16H1/32F16N39/02H02K5/18H02K5/20H02K9/19
CPCB60K17/046H02K9/19F16H1/32B60K2007/0092B60K2007/0038B60K2001/003H02K1/32H02K7/14H02K5/20Y02T10/641B60K7/0007Y02T10/64H02K5/203
Inventor 牧野智昭山本宪
Owner NTN CORP
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