Planetary gear reducer for vehiclular steering apparatus

Patent metadata

Field	Value
Publication number	US-9523411-B2
Application number	US-201514723456-A
Country	US
Kind code	B2
Filing date	May 28, 2015
Priority date	Jun 2, 2014
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

Disclosed is a planetary gear reducer for a vehicular steering apparatus. The planetary gear reducer includes: a sun gear, to which a steering shaft is joined; a planetary gear circumscribing the sun gear; a carrier, to which a rotary shaft of the planetary gear is joined; a ring gear, in which the planetary gear is inscribed; and backlash compensation members. The backlash compensation members are coupled to one or more of the sun gear, the planetary gear, and the ring gear such that the backlash compensation members are rotated in a state where they are in close contact with each other.

First claim

What is claimed is:

1. A planetary gear reducer for a vehicular steering apparatus, the planetary gear reducer comprising:
a sun gear, to which a steering shaft is joined;
a planetary gear circumscribing the sun gear;
a carrier, to which a rotary shaft of the planetary gear is joined;
a ring gear, in which the planetary gear is inscribed; and
one or more backlash compensation members coupled to each of the sun gear, the planetary gear, and the ring gear such that the backlash compensation members are rotated in a state where the backlash compensation members are in close contact with each other.

2. The planetary gear reducer of claim 1 , wherein each of the backlash compensation members is formed in a ring shape or in a shape of a ring slit at one side.

3. The planetary gear reducer of claim 2 , wherein each of the sun gear, the planetary gear, and the ring gear is provided with an axially stepped fastening flange that extends around a circumference thereof such that one of the backlash compensation members can be seated on the fastening flange.

4. The planetary gear reducer of claim 3 , wherein each of the backlash compensation members is formed of an elastic material.

5. The planetary gear reducer of claim 3 , wherein the backlash compensation members are coupled to two gears that are meshed with each other, among the sun gear, the planetary gear, and the ring gear, such that the backlash compensation members are in close contact with each other.

6. The planetary gear reducer of claim 5 , wherein the backlash compensation members include a first backlash compensation member formed of an elastic material and a second backlash compensation member formed of a metallic material, and the first backlash compensation member and the second backlash compensation member are coupled to be in close contact with each other.

7. The planetary gear reducer of claim 1 , wherein the backlash compensation members include a first backlash compensation member formed of an elastic material and a second backlash compensation member formed of a metallic material, and the first backlash compensation member and the second backlash compensation member are coupled to be in close contact with each other.

8. The planetary gear reducer of claim 7 , wherein the first backlash compensation member is coupled to each of the sun gear and the ring gear, and the second backlash compensation member is coupled to the planetary gear.

9. The planetary gear reducer of claim 7 , wherein the second backlash compensation member is coupled to each of the sun gear and the ring gear, and the first backlash compensation member is coupled to the planetary gear.

Assignees

• Mando Corp

Inventors

• Shin Kyung Sub
• Park Jung Sik
• Chae Han Sang

Classifications

• F16H1/36

  with two central gears coupled by intermeshing orbital gears · CPC title

• F16H1/2863 Primary

  Arrangements for adjusting or for taking-up backlash · CPC title

• B62D5/008

  Changing the transfer ratio between the steering wheel and the steering gear by variable supply of energy, e.g. by using a superposition gear · CPC title

• F16H57/0006

  Vibration-damping or noise reducing means specially adapted for gearings (devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183) · CPC title

• B62D7/224

  acting between the steering wheel and the steering gear, e.g. on the steering column · CPC title