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Reclining device for seat

A seat and backrest technology, applied in special positions of vehicles, vehicle seats, transportation and packaging, etc., can solve the problems of restricting the freedom of the reclining device, reducing market competitiveness, and high bearing prices, and improving the degree of freedom, Reliable peel resistance and excellent low friction properties

Inactive Publication Date: 2010-12-22
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In this case, the bearing bush to be used is preferably the bearing bush of the above-mentioned laminated structure, but the standard size of the generally available laminated bearing bush depends on the bearing manufacturer, and if it is used, the freedom of design of the reclining device will be limited. Spend
[0013] In addition, when a bearing bush with a laminated structure is used as a special order product other than the standard size, the price of the bearing becomes very high, the market competitiveness is reduced, and the practicality is lost.

Method used

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  • Reclining device for seat
  • Reclining device for seat
  • Reclining device for seat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] In Example 1, 100 parts by weight of polytetrafluoroethylene (PTFE), 90 parts by weight of polyamideimide resin as binder resin, and 90 parts by weight of polyamideimide resin as A coating material (manufactured by NTN Precision Plastics Co., Ltd.: North Avery FL7075) consisting of 10 parts by weight of iron oxide as a compounding agent was fired at about 230° C. to form a fluororesin film made of PTFE with a thickness of 0.025 mm.

Embodiment 2

[0076] In embodiment 2, after the copper spraying layer that is made of copper 95%, tin 5% is formed on the surface of the wedge-shaped sheet that is made of iron-based sintered material, and then spray-coats polytetrafluoroethylene (PTFE) 100 weight parts, After a coating material (manufactured by NTN Precision Plastics Co., Ltd.: North Avery FL7075) consisting of 90 parts by weight of polyamide-imide resin as a binder resin and 10 parts by weight of iron oxide as a compounding agent, at about 230° C. Firing to form a fluororesin film made of PTFE with a thickness of 0.025 mm.

Embodiment 3

[0078] In Example 3, after forming a nickel sprayed layer on the surface of the wedge-shaped piece made of iron-based sintered material, 100 parts by weight of polytetrafluoroethylene (PTFE) and polyamide imide as a binder resin were sprayed on the entire surface. 100 parts by weight of amine resin and 20 parts by weight of graphite as a compounding agent (NTN Precision Plastics Co., Ltd.: Bei Aili RCB) are fired at about 230°C to form PTFE with a thickness of 0.025mm. Fluorine resin coating.

[0079] exist figure 1 , 2 In Embodiments 1, 2, and 3 in which the seat reclining device shown in this way is assembled with the wedge-shaped piece obtained in this way, it is not necessary to press the sliding bearing into the outer peripheral surface of the shaft of the internal gear 1 in advance, and by rotating the operating lever, When the wedge-shaped pieces 6, 6' are pushed by the cam arranged on the shaft of the inner gear, they can slide extremely smoothly, and the outer gear...

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Abstract

A reclining device for a seat such as an automobile seat operated by a differential transmission mechanism (taumel mechanism). The reclining device does not require precise machining of that surface of an external gear to which a sliding bearing is press-fitted and can be produced at low cost without the degree of design freedom restricted by standards for bearing bushes. The reclining device hasthe specific differential transmission mechanism to enable adjustment of the opening angle of a hinge for joining the seat surface portion to the back rest portion of the seat. In the differential transmission mechanism, an internal gear (1) is meshed with the external gear (2) having teeth slightly less in number than the internal gear, and a pair of wedge-shaped pieces (6, 6') is arranged in anarcuate gap formed between the shaft hole (3) of the external gear (2) and the small diameter portion of a cam (5) that is formed integrally with the shaft (4) of the internal gear (1). The arrangement of the pair of wedge-shaped pieces (6, 6') is such that tapered ends (6a, 6'a) thereof are opposite to each other. At least the outer surfaces (6b, 6'b) of the wedge-shaped pieces (6, 6') are formed of a material having low sliding friction. This is because they function as frictional sliding contact surfaces when the wedge-shaped pieces (6, 6') are pressed by the cam (5) and moved in the arcuate gap in a sliding manner.

Description

technical field [0001] The present invention relates to a reclining device for a seat, and specifically relates to a reclining device for a seat suitable for a seat reclining device of an automobile or the like. Background technique [0002] Generally, seat reclining devices that can adjust the inclination angle of the backrest using a gear differential transmission mechanism to adjust the opening angle of the hinge that connects the seat surface portion and the backrest portion are known. [0003] mainly based on Figure 5 , and then partly use figure 1 A case where a differential transmission mechanism of gears is used in a conventional seat reclining device will be described. In this case, a differential transmission mechanism of gears is provided on a hinge connecting the seat surface portion and the backrest portion of the seat. [0004] In this differential transmission mechanism, the internal gear 1 (refer to figure 1 ), mesh with the external gear 2 with fewer te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60N2/225A47C1/025
CPCB60N2/2252B60N2/2254A47C1/025A47C7/46
Inventor 福泽觉丹羽洋加藤敏昭
Owner NTN CORP