Title:
WHEEL BEARING DEVICE WITH BUILT-IN IN-WHEEL MOTOR
Document Type and Number:
WIPO Patent Application WO/2011/115219
Kind Code:
A1
Abstract:
Disclosed is a wheel bearing device with a built-in in-wheel motor, which is capable of improving the sealing performance in an electric vehicle to enhance the durability.
Specifically disclosed is a wheel bearing device with a built-in in-wheel motor, in which a wheel bearing (1), a reduction gear (3), and a motor (2) are mounted on the same shaft as the center shaft of a wheel, wherein the wheel bearing (1) is provided with: an outer member (27) which is affixed to a reduction gear casing (12), and on the inner periphery of which a plurality of rows of outer rolling surfaces (27a) are formed; an inner member (25) which consists of a hub wheel (23) which has a wheel mounting flange (28) at one end section, and on the outer periphery of which an inner rolling surface (23a) and a small diameter step section (23b) extending axially from the inner rolling surface (23a) are formed, and an inner wheel (24) which is pressed into the small diameter step section (23b), and on the outer periphery of which an inner rolling surface (24a) is formed; a plurality of rows of rolling elements (26) accommodated between both rolling surfaces; and a seal (34) attached to the outer side of the outer member (27), recessed grooves (40, 43, 38) being formed on the outer periphery of the reduction gear casing (12), a motor casing (41), and the outer member (27).
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| WO/2005/023575 | IN-WHEEL MOTOR CAPABLE OF PROTECTION OF SPEED REDUCER |
| WO/1994/012363 | FOUR-WHEEL DRIVE DEVICE FOR A LARGE DUMP TRUCK |
| JP2003325587 | MOTOR POWER DRIVING APPARATUS FOR WHEELCHAIR |
Inventors:
SHIBATA, Kiyotake (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
Application Number:
JP2011/056417
Publication Date:
September 22, 2011
Filing Date:
March 17, 2011
Export Citation:
Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
ＮＴＮ株式会社 (〒03 大阪府大阪市西区京町堀１丁目３番１７号 Osaka, 〒5500003, JP)
ＮＴＮ株式会社 (〒03 大阪府大阪市西区京町堀１丁目３番１７号 Osaka, 〒5500003, JP)
International Classes:
B60K7/00; B60B35/14; B60B35/18; F16C19/18; F16C33/58; F16C33/76; F16J15/32
Attorney, Agent or Firm:
KOSHIKAWA, Takao (19F, Hamamatsu Act Tower 111-2, Itayamachi, Naka-ku, Hamamatsu-sh, Shizuoka 91, 〒4308691, JP)
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Claims:
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