Reclining apparatus for seat for vehicle and seat for vehicle with reclining apparatus

Patent metadata

Field	Value
Publication number	US-10293709-B2
Application number	US-201715479685-A
Country	US
Kind code	B2
Filing date	Apr 5, 2017
Priority date	Apr 14, 2016
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

An object of the present invention is to provide a seat for a vehicle which is capable of smoothly and stably adjusting the reclining of a seat back by driving an electrical reclining motor 34 , even if the electrical reclining motor 34 is diagonally mounted on a seat back frame structure in a case where the electrical reclining motor 34 is fixedly connected on a seat back frame structure, or even if the electrical reclining motor 34 becomes inclined due to a deformation of the seat back frame structure after such a fixedly connection.
There is provided a seat 10 for a vehicle comprising a seat back frame structure 12 a lower end of which is connected to a rear end of a seat cushion frame structure 14 in such a way that the seat back frame structure 12 can be inclined relative to the seat cushion frame structure 14 , said seat back frame structure 12 including a pair of side frames 20 A,B each of which extends in a vertical direction of the vehicle, said seat 10 for the vehicle further comprising a through-hole 28 provided on a lower end portion of each of the pair of side frames 20 A,B, a connecting rod 30 extending through each of the through-holes 28 so as to be rotatable about a horizontal direction, an electrical reclining motor 34 rotating said connecting rod 30 and provided along the one of side surfaces of the one of said pair of side frames 20 A,B, and a reclining apparatus 16 provided on the other of the side surfaces of each of said pair of side frames 20 A,B, a bolt through-hole 72 being provided on a non-rotational driven solid portion of said electrical reclining motor 34 , a bolt 74 which fits into said bolt through-hole 72 is provided for fixedly bolting said electrical reclining motor 34 on said one of the side surfaces of the one of the pair of side frames 20 A,B, said bolt 74 comprising a head portion 76 and a shank portion 78 with a circular cross-section, said shank portion 78 comprises an enlarged-diameter portion 82 on its end portion and a reduced-diameter portion 84 adjacent to the enlarged-diameter portion 82 with being concentric to each other.

First claim

What is claimed is:

1. A seat for a vehicle comprising a seat back frame structure, a lower end of which is connected to a rear end of a seat cushion frame structure in such a way that the seat back frame structure can be inclined relative to the seat cushion frame structure, said seat back frame structure including a pair of side frames each of which extends in a vertical direction of the vehicle, said seat for the vehicle further comprising a through-hole provided on a lower end portion of each said side frame, a connecting rod extending through each of the through-holes so as to be rotatable about a horizontal direction, an electrical reclining motor rotating said connecting rod and provided along one side surface of one of said side frames, and a reclining apparatus provided on another side surface of each said side frame,
a bolt through-hole being provided on a non-rotational driven solid portion of said electrical reclining motor, a bolt which fits into said bolt through-hole is provided for directly and fixedly bolting said electrical reclining motor on said one side surface of the one side frame,
said bolt comprising a head portion, a shank portion with a circular cross-section, and a threaded portion, in this order, said shank portion comprises an enlarged-diameter portion on its end portion at a threaded portion side of said bolt and a reduced-diameter portion adjacent to the enlarged-diameter portion, the enlarged-diameter portion and the reduced-diameter portion being concentric to each other, and a diameter of the enlarged-diameter portion is set for insertion into said bolt through-hole.

2. The seat for the vehicle according to claim 1 , wherein a step of a stepped portion between said enlarged-diameter portion and said reduced-diameter portion and/or a width in a longitudinal direction of said shank portion of said enlarged-diameter portion are set so as to keep an intersecting angle between said electrical reclining motor and said connecting rod constant.

3. The seat for the vehicle according to claim 2 , wherein said step of the stepped portion between said enlarged-diameter portion and said reduced-diameter portion and said width in the longitudinal direction of said shank portion of said enlarged-diameter portion are set so as to keep the intersecting angle between said electrical reclining motor and said connecting rod constant.

4. The seat for the vehicle according to claim 2 , wherein said step of the stepped portion between said enlarged-diameter portion and said reduced-diameter portion is set in accordance with a length of said bolt through-hole.

5. The seat for the vehicle according to claim 4 , wherein said enlarged-diameter portion is provided on an end portion opposite to said head portion, said width in the longitudinal direction of said shank portion of said enlarged-diameter portion is set in accordance with the length of said bolt through-hole.

6. The seat for the vehicle according to claim 1 , wherein said electrical reclining motor is bolted on said one of the side frames by making said bolt pass through the bolt through-hole after a rubber bush passes through said head portion.

7. The seat for the vehicle according to claim 6 , wherein said electrical reclining motor is provided along an inner side surface of said one side frame so as to make said bolt through-hole horizontally oriented,
said reclining apparatus is provided on an outer side surface of each said side frame,
said bolt is made to pass through said bolt through-hole and is tightened with a nut disposed at said outer side surface of said one side frame.

8. The seat for the vehicle according to claim 1 , wherein said reclining apparatus comprises an internal teeth gear which is provided around said connecting rod and is fixed on said seat cushion frame structure or said one side frame, an external teeth gear which is provided around said connecting rod so as to mate with said internal teeth gear and is fixed on said one side frame or said seat cushion frame structure, and an eccentric driving means for driving said internal teeth gear or said external teeth gear in an eccentric manner by being driven by rotation of said connecting rod.

9. The seat for the vehicle according to claim 8 , wherein said internal teeth gear comprises internal teeth provided around said connecting rod in a concentric manner, and said external teeth gear comprises external teeth provided around said connecting rod in a concentric manner with the number of its teeth mating with said internal teeth being less than that of the internal teeth.

10. The seat for the vehicle according to claim 1 , wherein the enlarged-diameter portion and the reduced-diameter portion of the shank portion are disposed longitudinally between the head portion and the threaded portion, and the enlarged-diameter portion is disposed longitudinally between the threaded portion and the reduced-diameter portion.

11. The seat for the vehicle according to claim 10 , wherein the enlarged-diameter portion has a diameter which is greater than a diameter of the reduced-diameter portion.

12. A reclining unit comprising a through-hole provided on a lower end portion of each of a pair of side frames of a seat back frame structure, a connecting rod extending through each of the through-holes so as to be rotatable about a horizontal direction, an electrical reclining motor rotating said connecting rod and provided along one side surface of one of said side frames, and a reclining apparatus provided on another side surface of each said side frame,
said reclining apparatus comprising an internal teeth gear which is provided around said connecting rod and is fixed on said seat cushion frame structure or said one side frame, an external teeth gear which is provided around said connecting rod so as to mate with said internal teeth gear and is fixed on said one side frame or said seat cushion frame structure, and an eccentric driving means for driving said internal teeth gear or said external teeth gear in an eccentric manner by being driven by rotation of said connecting rod,
a bolt through-hole being provided on a non-rotational solid portion of said electrical reclining motor, a bolt which fits into said bolt through-hole being provided for directly and fixedly bolting said electrical reclining motor on said one side surface of the one side frame,
said bolt comprising a head portion, a shank portion with a circular cross-section, and a threaded portion, in this order, said shank portion comprising an enlarged-diameter portion on its end portion at a threaded portion side of said bolt and a reduced-diameter portion adjacent to the enlarged-diameter portion, the enlarged-diameter portion and the reduced-diameter portion being concentric to each other, and a diameter of the enlarged-diameter portion is set for insertion into said bolt through-hole, and
a step of a stepped portion between said enlarged-diameter portion and said reduced-diameter portion and a width in a longitudinal direction of said shank portion of said enlarged-diameter portion being set so as to keep an intersecting angle between said electrical reclining motor and said connecting rod constant.

13. The reclining unit according to claim 12 , wherein the enlarged-diameter portion and the reduced-diameter portion of the shank portion are disposed longitudinally between the head portion and the threaded portion, and the enlarged-diameter portion is disposed longitudinally between the threaded portion and the reduced-diameter portion.

14. The reclining unit according to claim 13 , wherein the enlarged-diameter portion has a diameter which is greater than a diamet

Assignees

• Nhk Spring Co Ltd

Inventors

• Murakami Toru
• Sakai Kiyomi
• Oda Mitsuaki

Classifications

• B60N2205/50

  Interlocking shaft arrangements transmitting movement between hinge mechanisms on both sides of a seat · CPC title

• B60N2205/20

  Measures for elimination or compensation of play or backlash · CPC title

• B60N2/682

  Joining means · CPC title

• B60N2/2252

  in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. one gear without sun gear · CPC title

• B60N2002/0236

  Operations & Transport · mapped topic