Seal chain

Patent metadata

Field	Value
Publication number	US-11499605-B2
Application number	US-201716340814-A
Country	US
Kind code	B2
Filing date	Oct 3, 2017
Priority date	Nov 4, 2016
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

A seal chain includes two inner link plates opposed to and spaced apart from each other, a tubular bushing, opposite ends of the bushing being respectively joined to the two inner link plates, a pin rotationally inserted into the bushing, a tubular roller into which the bushing is inserted, the roller being rotationally supported by the bushing, and two outer link plates arranged to externally hold the two inner link plates in between, opposite ends of the pin being respectively joined to the two outer link plates. A recess into which an end of the roller is inserted is formed in an inner surface of each of the inner link plates.

First claim

The invention claimed is:

1. A seal chain comprising:
two inner link plates opposed to and spaced apart from each other;
a tubular bushing, opposite ends of the bushing being respectively joined to the two inner link plates;
a pin rotationally inserted into the bushing;
a tubular roller into which the bushing is inserted, the roller being rotationally supported by the bushing; and
two outer link plates arranged to externally hold the two inner link plates in between, opposite ends of the pin being respectively joined to the two outer link plates,
wherein a recess into which an end of the roller is inserted is formed in an inner surface of each of the inner link plates, wherein
a retainer ring is coupled to an outer circumferential surface of the bushing,
an accommodation groove that accommodates the retainer ring is formed in an inner circumferential surface of the roller,
the two inner link plates are opposed to and spaced apart from each other in a width direction,
the two outer link plates are arranged to externally hold the two inner link plates in between in the width direction,
a first gap is formed between the retainer ring and the accommodation groove in a radial direction of the retainer ring, and
second gaps are formed between the retainer ring and the accommodation groove in the width direction.

2. The seal chain according to claim 1 , wherein the accommodation groove is formed at a position located away from an engaged portion of the roller engaged with a sprocket.

3. The seal chain according to claim 2 , wherein at least part of the accommodation groove is located in the recess.

4. The seal chain according to claim 1 , wherein the retainer ring is annular and has a variable inner diameter.

5. The seal chain according to claim 1 , wherein the first gap is larger than the second gaps.

Assignees

• Tsubakimoto Chain Co

Inventors

• Yasu Takuya
• Fujiwara Makoto
• Nishizawa Yusuke

Classifications

• F16G13/06 Primary

  with links connected by parallel driving-pins with or without rollers {so-called open links} · CPC title

• F16G13/02

  Driving-chains (specially adapted to gearings with variable gear-ratio F16H9/00) · CPC title

• F16J15/28 Primary

  with sealing rings made of metal · CPC title

• F16J9/04

  Helical rings · CPC title

• F16J15/26

  with stuffing-boxes for rigid sealing rings · CPC title