In-wheel motor drive device

Patent metadata

Field	Value
Publication number	US-11548337-B2
Application number	US-201716334865-A
Country	US
Kind code	B2
Filing date	Sep 21, 2017
Priority date	Sep 30, 2016
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

An in-wheel motor drive device (10) includes: a motor portion (21); a casing (43) housing a rotation transmission path from a motor rotation shaft of the motor portion to a rotating wheel; a suspending bracket (61) including an upper joining seat portion (62) joinable with an upper side suspension member (76) of a suspension device, a lower joining seat portion (64) joinable with a lower side suspension member (71) of the suspension device, and an intermediate portion (63) connecting the upper joining seat portion and the lower joining seat portion, and a fixing means (69) for mounting and fixing the suspending bracket (61) to an outer wall surface of the casing (43).

First claim

The invention claimed is:

1. An in-wheel motor drive device, comprising:
a wheel hub bearing portion that has a rotating wheel integrally rotating with a wheel, a fixed wheel facing the rotating wheel via a radial gap, and a plurality of rolling elements interposed in the radial gap;
a motor portion that drives the rotating wheel;
a casing that houses a rotation transmission path from a motor rotation shaft of the motor portion to the rotating wheel;
a suspending bracket that includes an upper joining seat portion and a lower joining seat portion joinable with a suspension device and an intermediate portion that connects the upper joining seat portion and the lower joining seat portion; and
a fixing means for mounting and fixing the suspending bracket to an outer wall surface of the casing, the fixing means including at least one bolt penetrating the suspending bracket and the casing,
wherein the suspending bracket has a U shaped or C shaped portion oriented in a vehicle front/rear direction and that forms a recess portion in the suspending bracket, and
wherein the casing includes a raised portion, the recess portion of the suspending bracket receiving the raised portion.

2. The in-wheel motor drive device according to claim 1 , wherein the suspending bracket further includes a tie rod joining seat portion for joining with a tie rod of a steering device.

3. The in-wheel motor drive device according to claim 1 , wherein the suspending bracket further includes a brake caliper joining seat portion for joining with a brake caliper.

4. The in-wheel motor drive device according to claim 1 , wherein the at least one bolt extends in parallel with an axis of the rotating wheel.

5. The in-wheel motor drive device according to claim 1 , wherein the at least one bolt extends in a vehicle front/rear direction and penetrating.

6. The in-wheel motor drive device according to claim 1 , wherein the raised portion is in a front portion, a rear portion, or inside of a vehicle width direction, and the intermediate portion has the recess portion.

7. The in-wheel motor drive device according to claim 6 , wherein: a projection is erected on an edge of the raised portion, a casing through hole is formed in the projection, a suspending bracket through hole is formed in a part corresponding to the projection on the suspending bracket, and a bolt as the fixing means passing through the casing through hole and the suspending bracket through hole.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Tamura Shiro
• Taikou Shinya

Classifications

• B60G7/00

  Pivoted suspension arms; Accessories thereof (means for maintaining substantially constant wheel camber during suspension movement B60G3/26; {articulations for wheels B60G5/00; leaf spring attaching means B60G11/10, B60G11/12; trailing arm twist beam axle attaching means B60G21/052; articulations in general F16C}) · CPC title

• B60K2007/0061

  the motor axle being parallel to the wheel axle · CPC title

• B60K2007/0038

  the motor moving together with the wheel axle · CPC title

• F16H2057/02034

  Gearboxes combined or connected with electric machines · CPC title

• B60G3/28 Primary

  at least one of the arms itself being resilient, e.g. leaf spring {(B60G7/003 takes precedence)} · CPC title