Engine starting device

Patent metadata

Field	Value
Publication number	US-11428198-B2
Application number	US-202017026511-A
Country	US
Kind code	B2
Filing date	Sep 21, 2020
Priority date	Jun 29, 2020
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A rope reel includes first circumferential wall portion that is erectly provided so as to surround outer circumference of recoil spring. A starter case includes second circumferential wall portion that is erectly provided so as to adjoin inner circumferential face or outer circumferential face of first circumferential wall portion. The first circumferential wall portion and the second circumferential wall portion are disposed so that end edges of the first circumferential wall portion and the second circumferential wall portion overlap each other when viewed in radial direction. A plate is disposed between starter case and recoil spring inside first circumferential wall portion. Thus, it is possible to provide structure which is realized in space-saving manner to make foreign substances difficult to intrude into starting device in order to prevent deformation or damage of recoil spring, and from which the foreign substances are easily discharged even if foreign substances have intruded.

First claim

What is claimed is:

1. An engine starting device comprising:
a starter case;
a rope reel that is rotatably assembled to the starter case;
a rope that is wound around a retention groove formed in the rope reel; and
a recoil spring that is housed between the starter case and the rope reel to exert an urging force in a direction to rewind the rope, wherein:
the rope reel includes a first circumferential wall portion that is erectly provided so as to surround an outer circumference of the recoil spring,
the starter case includes a second circumferential wall portion that is erectly provided so as to adjoin an inner circumferential face or an outer circumferential face of the first circumferential wall portion,
the first circumferential wall portion and the second circumferential wall portion are disposed so that an end edge of the first circumferential wall portion overlaps an edge of the second circumferential wall portion when viewed in a radial direction of the starter case,
a plate is disposed between the starter case and the recoil spring inside the first circumferential wall portion, and
an edge of the first circumferential wall portion extends toward the starter case to a point further in an axial direction of the rope reel than the plate.

2. The engine starting device according to claim 1 , wherein the plate is sandwiched between the starter case and the recoil spring, and retained by the starter case and the recoil spring.

3. The engine starting device according to claim 1 , wherein:
the starter case is configured to be attached to an engine in use, such that cooling air for cooling the engine flows along the outer circumferential face of the first circumferential wall portion or an outer circumferential face of the second circumferential wall portion,
when the first circumferential wall portion is located on an outer circumferential side of the second circumferential wall portion, the cooling air flows in an extending direction of the first circumferential wall portion, and
when the second circumferential wall portion is located on an outer circumferential side of the first circumferential wall portion, the cooling air flows in an extending direction of the second circumferential wall portion.

4. The engine starting device according to claim 2 , wherein:
the starter case is configured to be attached to an engine in use, such that cooling air for cooling the engine flows along the outer circumferential face of the first circumferential wall portion or an outer circumferential face of the second circumferential wall portion,
when the first circumferential wall portion is located on an outer circumferential side of the second circumferential wall portion, the cooling air flows in an extending direction of the first circumferential wall portion, and
when the second circumferential wall portion is located on an outer circumferential side of the first circumferential wall portion, the cooling air flows in an extending direction of the second circumferential wall portion.

5. The engine starting device according to claim 1 , wherein a gap between the first circumferential wall portion and the second circumferential wall portion forms an opening facing a direction different from a flow of cooling air.

6. The engine starting device according to claim 2 , wherein a gap between the first circumferential wall portion and the second circumferential wall portion forms an opening facing a direction different from a flow of cooling air.

7. The engine starting device according to claim 3 , wherein a gap between the first circumferential wall portion and the second circumferential wall portion forms an opening facing a direction different from a flow of cooling air.

8. The engine starting device according to claim 4 , wherein a gap between the first circumferential wall portion and the second circumferential wall portion forms an opening facing a direction different from a flow of cooling air.

9. The engine starting device according to claim 1 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

10. The engine starting device according to claim 2 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

11. The engine starting device according to claim 3 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

12. The engine starting device according to claim 4 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

13. The engine starting device according to claim 5 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

14. The engine starting device according to claim 6 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

15. The engine starting device according to claim 7 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

16. The engine starting device according to claim 8 , wherein a ring shaped pressure balancing chamber is formed between the starter case and the plate inside the first circumferential wall portion.

Assignees

• Starting Ind
• Honda Motor Co Ltd

Inventors

• Horikoshi Yoshinori
• Mizuno Tomoyasu
• Kasai Akihito
• Hasebe Hiroaki

Classifications

• F02N5/02

  of spring type · CPC title

• F02N3/02 Primary

  having pull-cords · CPC title

• F02N15/00 Primary

  Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00 · CPC title

• A01D34/76 Primary

  Driving mechanisms for the cutters · CPC title