Belt-driven starter-generator

Patent metadata

Field	Value
Publication number	US-10830330-B2
Application number	US-201815866662-A
Country	US
Kind code	B2
Filing date	Jan 10, 2018
Priority date	Nov 20, 2013
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A belt-driven starter-generator includes a rotary shaft, and a pulley belt coupled on an outer peripheral surface of the rotary shaft. A key is press-fitted into a pocket formed between the rotary shaft and the pulley belt so as to fix the rotary shaft to the pulley belt. A coupling member is coupled to a thread formed on the outer peripheral surface of the rotary shaft so as to support one side of the pulley belt. Operational reliability and assembly convenience may be improved by the belt-driven starter-generator of the present disclosure.

First claim

What is claimed is:

1. A belt-driven starter-generator comprising:
a rotary shaft;
a belt pulley coupled to an outer peripheral surface of the rotary shaft, the belt pulley including the through-hole through which the rotary shaft is inserted;
a coupling member coupled to one end of the rotary shaft; and
a washer positioned on the rotary shaft and between the belt pulley and the coupling member,
wherein the rotary shaft includes a first fixing part positioned on an outer peripheral surface thereof, and the belt pulley includes a second fixing part configured to be coupled to the first fixing part, and
wherein the washer has an outer diameter that is less than a diameter of the through-hole, and at least a portion of the washer is received in the through-hole to contact at least one of the first fixing part or the second fixing part.

2. The belt-driven starter-generator of claim 1 , wherein the first fixing part comprises a protrusion and the second fixing part comprises a pocket in which the protrusion is inserted.

3. The belt-driven starter-generator of claim 1 , wherein the first fixing part comprises a pocket and the second fixing part comprises a protrusion inserted in the pocket.

4. The belt-driven starter-generator of claim 2 , wherein the first fixing part comprises a plurality of protrusions radially extending from the rotary shaft.

5. The belt-driven starter-generator of claim 4 , wherein the second fixing part comprises a plurality of pockets in which the plurality of protrusions is inserted.

6. The belt-driven starter-generator of claim 1 , further comprising:
a housing;
a stator disposed in the housing; and
a rotor disposed in the housing.

7. The belt-driven starter-generator of claim 6 , wherein the housing comprises a first housing accommodating the stator and the rotor, and a second housing accommodating the first housing.

8. The belt-driven starter-generator of claim 7 , further comprising a cooling channel formed between the first housing and the second housing.

9. The belt-driven starter-generator of claim 1 , wherein the belt pulley comprises a receiving groove to which one end of the rotary shaft is exposed, and the through-hole is formed on a bottom surface of the receiving groove.

10. The belt-driven starter-generator of claim 9 , wherein the receiving groove has a diameter greater than the diameter of the through-hole and a maximum linear width of the coupling member.

11. The belt-driven starter-generator of claim 10 , wherein the coupling member comprises a nut portion coupled to one end of the rotary shaft, and a fixed portion connected to the nut portion so as to come into contact with the bottom surface of the receiving groove of the belt pulley and a top surface of the washer.

12. The belt-driven starter-generator of claim 1 , wherein the washer is a ring-shaped tension washer.

13. The belt-driven starter-generator of claim 2 , wherein a height of the protrusion is less than a height of the pocket.

14. The belt-driven starter-generator of claim 13 , wherein the height of protrusion is less than the height of the pocket by an insertion distance of the washer into the through-hole.

15. The belt-driven starter-generator of claim 11 , wherein the diameter of the washer is less than a maximum linear width of the fixed portion of the coupling portion.

16. The belt-driven starter-generator of claim 11 , wherein the nut portion includes a hole that is screw-coupled to a thread formed at an end of the rotary shaft.

17. The belt-driven starter-generator of claim 11 , wherein the fixed portion has a disc shape and a flat contact surface configured to contact the bottom surface of the receiving groove of the belt pulley and the top surface of the washer.

18. The belt-driven starter-generator of claim 11 , wherein the nut includes a lower surface configured to concurrently contact a surface of the belt pulley around the through-hole and a top surface of the washer.

Assignees

• Lg Innotek Co Ltd

Inventors

• Yu Hyun Soo

Classifications

• H02K5/20

  with channels or ducts for flow of cooling medium · CPC title

• H02K5/203

  specially adapted for liquids, e.g. cooling jackets · CPC title

• F02N11/04 Primary

  the motors being associated with current generators · CPC title

• F16H55/49

  Features essential to V-belts pulleys · CPC title

• F02N15/02 Primary

  Gearing between starting-engines and started engines; Engagement or disengagement thereof · CPC title