Wheel driving device and cleaner robot having the same

• US 10,548,445 B2
• Filed: 01/24/2017
• Issued: 02/04/2020
• Est. Priority Date: 01/26/2016
• Status: Active Grant

• Current Assignee: Nidec Corporation
• Original Assignee: Nidec Corporation
• Inventors: Liu, Chun-Hsien, Ichizaki, Hiroyuki
• Primary Examiner(s): Chin, Randall E
• Application Number:
  US15/413,420
• Publication Number:
  US 20170209015A1
• Time in Patent Office: 1,106 Days
• CPC Class Codes: A47L 11/24 Floor-sweeping machines, motor-driven
• CPC Class Codes: A47L 11/4066 Propulsion of the whole machine
• CPC Class Codes: A47L 11/4069 Driving or transmission means for the cleaning tools
• CPC Class Codes: A47L 2201/00 Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
• CPC Class Codes: A47L 9/009 Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles
• CPC Class Codes: A47L 9/0411 driven by electric motor
• CPC Class Codes: A47L 9/0427 Gearing or transmission means therefor
• CPC Class Codes: A47L 9/0433 Toothed gearings
• CPC Class Codes: A47L 9/0438 with gears having orbital motion, e.g. planetary gearing
• CPC Class Codes: A47L 9/0488 Combinations or arrangements of several tools, e.g. edge cleaning tools
• CPC Class Codes: A47L 9/2847 Surface treating elements
• CPC Class Codes: A47L 9/2852 Elements for displacement of the vacuum cleaner or the accessories therefor, e.g. wheels, casters or nozzles
• CPC Class Codes: B25J 5/007 mounted on wheels
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 17/043 Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
• CPC Class Codes: B60K 17/28 characterised by arrangement, location, or type of power take-off
• CPC Class Codes: B60K 2025/005 driven by electric motors forming part of the propulsion unit
• CPC Class Codes: B60K 25/06 from the transmission power take-off transmissions having power-take-off B60K17/28
• CPC Class Codes: F16C 1/02 for conveying rotary movements
• CPC Class Codes: F16H 1/222 with non-parallel axes
• CPC Class Codes: F16H 2057/02034 : Gearboxes combined or connected with electric machines structural association with electric machines H02K7/116
• CPC Class Codes: F16H 2057/02039 : Gearboxes for particular applications

Abstract

A wheel driving device includes: a motor rotating a shaft: an input gear fixed to the shaft; at least one transmission gear meshed with the input gear to transmit power of the motor; and a final gear meshed with the transmission gear and connected with a wheel via an axis to transmit the power from the transmission gear to the wheel. The wheel driving device includes an extraction gear meshed with the final gear or the transmission gear, and a power transmission part connected with the extraction gear to transmit the power from the extraction gear to a cleaner head.

Claims

1. A wheel driving device, comprising:

a motor, rotating a shaft;

an input gear, fixed to the shaft;

at least one transmission gear, meshed with the input gear to transmit a power of the motor; and

a final gear, meshed with the transmission gear and connected with a wheel via an axis to transmit the power from the transmission gear to the wheel;

an extraction gear, meshed with the final gear or the transmission gear;

a power transmission part, connected with the extraction gear to transmit the power from the extraction gear to a cleaner head; and

a one-way clutch disposed between the power transmission part and the extraction gear.

2. The wheel driving device according to claim 1, wherein

the motor, the input gear, the transmission gear, the final gear and the extraction gear are integrated to a single module.

3. The wheel driving device according to claim 1, wherein

the motor, the input gear, the transmission gear and the final gear are integrated to a first module;

and

the extraction gear is formed as a second module.

4. The wheel driving device according to claim 1, wherein

the power transmission part is formed by a member having flexibility.

5. The wheel driving device according to claim 4, wherein

the power transmission part is a flexible shaft or a timing belt.

6. A cleaner robot, comprising

a housing, comprising a base, a cover, and a sidewall surrounding the base and the cover;

and

a travel unit, disposed on the base inside the housing,

wherein the travel unit comprises at least one pair of wheel driving devices, and at least one of the pair of the wheel driving devices is the wheel driving device according to claim 1.

7. The cleaner robot according to claim 6, wherein the cleaner head is a side brush, a circular brush, or a cleaner head with a dishcloth.

8. The cleaner robot according to claim 6, wherein the cleaner head is disposed on the base outside the housing.

9. The cleaner robot according to claim 6, wherein the cleaner head is disposed on the sidewall.

10. The cleaner robot according to claim 9, wherein the cleaner head is disposed perpendicular to the sidewall.

11. The cleaner robot according to claim 9, wherein the cleaner head is disposed inclined at a predetermined angle with respect to the sidewall.

12. The cleaner robot according to claim 6, wherein the power transmission part connected with the cleaner head further penetrates the base or the sidewall.