In-wheel motor drive device

Patent metadata

Field	Value
Publication number	US-9340103-B2
Application number	US-201213980722-A
Country	US
Kind code	B2
Filing date	Jan 11, 2012
Priority date	Jan 21, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

An in-wheel motor driving device includes a wheel braking device. A back plate of a drum brake or a mounting member for calipers of a disc brake constituting the wheel braking device is formed integrally with an outboard-side end member which is fastened to a outboard-side end surface of a housing of a speed reducer section.

First claim

The invention claimed is:

1. An in-wheel motor driving device comprising a motor section including an output shaft; a wheel hub bearing section; a speed reducer section; and a wheel braking device; the output shaft of the motor section being coaxially connected with the wheel hub bearing section via the speed reducer section;
wherein:
the wheel braking device is a drum brake including a brake drum which is fastened to a hub ring in the wheel hub bearing section; and a back plate which is disposed on a fixing-ring side of the wheel hub bearing section,
the back plate of the drum brake is formed integrally with an outboard-side end member, which is made of an iron or steel material and fastened to an outboard-side end surface of an aluminum alloy housing of the speed reducer section,
the outboard-side end member is formed with bolt holes for bolts to fasten a fixing ring of the wheel hub bearing section, and
the outboard-side end member is fastened to the aluminum alloy housing of the speed reducer section on an outer diameter side of the speed reducer section using the bolts.

2. The in-wheel motor driving device according to claim 1 , wherein the fixing ring of the wheel hub bearing section and the outboard-side end member are formed integrally with each other.

3. The in-wheel motor driving device according to claim 1 , wherein the outboard-side end member has a knuckle formed integrally therewith, the knuckle being connected only with a lower arm extending from a car body.

4. The in-wheel motor driving device according to claim 1 , wherein the outboard-side end member has a knuckle formed integrally therewith, the knuckle being connected with an upper arm and a lower arm extending from a car body.

5. The in-wheel motor driving device according to claim 1 , wherein the outboard-side end member has a knuckle formed integrally therewith, an upper side of the knuckle being connected with a buffering device.

6. The in-wheel motor driving device according to claim 1 , wherein a sealing member is disposed between the outboard-side end member and the aluminum alloy housing of the speed reducer section for prevention of oil leakage from inside.

7. The in-wheel motor driving device according to claim 6 , wherein the sealing member is an O ring.

8. A vehicle comprising the in-wheel motor driving device according to claim 1 .

9. An in-wheel motor driving device comprising a motor section including an output shaft; a wheel hub bearing section; a speed reducer section; and a wheel braking device; the output shaft of the motor section being coaxially connected with the wheel hub bearing section via the speed reducer section;
wherein:
the wheel braking device is a disc brake including a brake disc which is fastened to a hub ring in the wheel hub bearing section; and calipers which are disposed on a fixing-ring side of the wheel hub bearing section,
the calipers have a mounting member which is formed integrally with an outboard-side end member, which is made of an iron or steel material and fastened to an outboard-side end surface of an aluminum alloy housing of the speed reducer section,
the outboard-side end member is formed with bolt holes for bolts to fasten a fixing ring of the wheel hub bearing section, and
the outboard-side end member is fastened to the aluminum alloy housing of the speed reducer section on an outer diameter side of the speed reducer section using the bolts.

10. The in-wheel motor driving device according to claim 9 , wherein the fixing ring of the wheel hub bearing section and the outboard-side end member are formed integrally with each other.

11. The in-wheel motor driving device according to claim 9 , wherein the outboard-side end member has a knuckle formed integrally therewith, the knuckle being connected only with a lower arm extending from a car body.

12. The in-wheel motor driving device according to claim 9 , wherein the outboard-side end member has a knuckle formed integrally therewith, the knuckle being connected with an upper arm and a lower arm extending from a car body.

13. The in-wheel motor driving device according to claim 9 , wherein the outboard-side end member has a knuckle formed integrally therewith, an upper side of the knuckle being connected with a buffering device.

14. The in-wheel motor driving device according to claim 9 , wherein a sealing member is disposed between the outboard-side end member and the aluminum alloy housing of the speed reducer section for prevention of oil leakage from inside.

15. A vehicle comprising the in-wheel motor driving device according to claim 9 .

Assignees

• Yukishima Ryou
• Suzuki Minoru
• Ntn Toyo Bearing Co Ltd

Inventors

• Yukishima Ryou
• Suzuki Minoru

Classifications

• B60K17/145

  the electric gearing being disposed in or adjacent to traction wheel · CPC title

• B60K2007/0092

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

• B60K17/043

  Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel · CPC title

• B60K7/0007 Primary

  the motor being electric · CPC title

• B60K2007/0038

  the motor moving together with the wheel axle · CPC title