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In-wheel motor unit and electric vehicle

An in-wheel motor and motor technology, applied in the field of in-wheel motor units and electric vehicles, can solve problems such as difficulty in ensuring fluid tightness

Active Publication Date: 2021-07-20
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to ensure complete liquid tightness, so there is a risk of absorbing moisture when the inner side is in a negative pressure state due to pressure changes caused by temperature changes inside the motor case caused by motor heat generation, etc.

Method used

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  • In-wheel motor unit and electric vehicle
  • In-wheel motor unit and electric vehicle
  • In-wheel motor unit and electric vehicle

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Embodiment Construction

[0034] Hereinafter, embodiments of the present teaching will be described with reference to the drawings.

[0035] figure 1 is a side view of the electric vehicle according to the embodiment. A saddle-riding electric vehicle will be described as an example of the electric vehicle. The saddle-riding electric vehicle may be an electric motorcycle, an electric three-wheeled vehicle, an electric four-wheeled vehicle, and the like.

[0036] The electric vehicle includes a front wheel 10 , a front fork 12 supporting the front wheel 10 , and a handle 14 (eg, a handlebar) connected to an upper portion of the front fork 12 . The right end and the left end of the handle 14 are provided with handles. For example, the right grip (not shown) is an accelerator grip for speed control.

[0037] A seat 16 is arranged behind the handle 14 . A battery 18 is attached below the seat portion 16 . The electric vehicle is a so-called scooter-type vehicle in which a space for placing a rider's l...

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PUM

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Abstract

The present invention relates to an in-wheel motor unit and an electric vehicle. The in-wheel motor unit includes an in-wheel motor having a hollow axle, a stator fixed to the axle, and a hollow motor housing in which an axle inner space is formed allowing the first axle opening to communicate with the second axle opening, wherein, The inner side of the motor housing is formed with a motor inner space, the first axle opening of the axle leads to the motor inner space; a first seal, which is used to ensure the liquid tightness of the motor inner space between the motor housing and the axle; the hollow arm, the inner side of the arm is formed with an arm inner space, the second axle opening leads to the arm inner space, and the axle is fixed to the arm in a detachable manner; the second seal is used to ensure that the arm inner space is between the arm and the axle liquid tightness; and a vent mechanism (first arm opening) which opens into the arm interior space and communicates with the outside air.

Description

technical field [0001] The present invention relates to an in-wheel motor unit and an electric vehicle. Background technique [0002] An electric motorcycle using a direct drive wheel motor is known (JP UM 7-046620 B). There is also known an in-wheel motor unit (JP 2014-213622 A). A power unit for controlling the driving of the rotary motor may be provided inside the rear arm supporting the rear wheel so as to freely rotate (Japanese Patent No. 4188641). By forming the rear arm from the main body and the cover, the inner side of the rear arm can be hollow (JP 2008-100609A and Japanese Patent No. 5352573). [0003] In the in-wheel motor type electric vehicle, waterproof measures are taken in the motor housing to prevent water from entering inside when the motor housing freely rotates relative to the axle shaft. However, it is difficult to ensure complete liquid tightness, so there is a risk of absorbing moisture when the inner side is in a negative pressure state due to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M7/12H02K5/04H02K5/10H02K5/124
CPCB62M7/12H02K5/04H02K5/10H02K5/124B60K7/0007B60K2007/0038B60K2007/0092B60R16/0215B60Y2410/115B60Y2200/126B60Y2200/12B60K1/04B60K2001/0422
Inventor 加茂伸一寺田润史藤代雅也大贯友和
Owner YAMAHA MOTOR CO LTD