Sliding ball type constant velocity joint for vehicles

Patent metadata

Field	Value
Publication number	US-9926985-B2
Application number	US-201314910774-A
Country	US
Kind code	B2
Filing date	Aug 9, 2013
Priority date	Aug 9, 2013
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A sliding ball type constant velocity joint for a vehicle includes an outer race that rotates upon receiving rotational power from a transmission and that has grooves formed for use as track grooves in the inner part; an inner race installed in the outer race; ten balls for transmitting rotational power from the outer race to the inner race; and a cage for supporting the ten balls.

First claim

The invention claimed is:

1. A sliding ball type constant velocity joint for a vehicle comprising:
an outer race rotating by receiving rotational power from a transmission and having grooves used as track grooves on its inner surface;
an inner race installed on an inner surface of the outer race;
ten balls for transmitting the rotational power of the outer race to the inner race; and
a cage for supporting the ten balls,
wherein the outer race has ten track grooves formed on a cylindrical inner surface having an inner diameter (do) of the outer race to be parallel with a central axis, and in order to secure the durability of the joint and the strength of the cage, a ratio (do/PCD) of the inner diameter (do) to PCD is set to be in a range of between 1.0 and 1.22.

2. The sliding ball type constant velocity joint of claim 1 , wherein the ten balls have the same PCD and size.

3. The sliding ball type constant velocity joint of claim 1 , wherein a ratio (f/PCD) of an offset (f) to PCD in each of the ten balls (D) is set to be in a range of between 0.02 and 0.11.

4. The sliding ball type constant velocity joint of claim 1 , wherein in order to secure the entire strength of the joint, a ratio (PCD/db) of PCD to a ball diameter (db) of each ball (D) is set to be in a range of between 3.4 and 5.1.

5. The sliding ball type constant velocity joint of claim 1 , wherein the inner race has ten track grooves formed on a spherical outer surface having an outer diameter (di) of the inner race to be parallel with a central axis, and in order to secure the durability of the joint and the strength of the cage, a ratio (di/PCD) of the outer diameter (di) to PCD is set to be in a range of between 0.9 and 1.11.

6. The sliding ball type constant velocity joint of claim 1 , wherein a ratio (dt/ds) of an outer diameter (dt) of the outer race to a serration pitch diameter (ds) of the inner race is set to be in a range of between 2.4 and 3.4.

7. A sliding ball type constant velocity joint for a vehicle comprising:
an outer race rotating by receiving rotational power from a transmission;
an inner race installed on an inner surface of the outer race;
a plurality of balls for transmitting the rotational power of the outer race to the inner race; and
a cage for supporting the balls, the cage comprises:
a spherical outer surface;
a spherical inner surface; and
a window grinding surface restricting the balls,

wherein the outer race has ten track grooves formed on a cylindrical inner surface having an inner diameter (do) of the outer race to be parallel with a central axis, and in order to secure the durability of the joint and the strength of the cage, a ratio (do/PCD) of the inner diameter (do) to PCD is set to be in a range of between 1.0 and 1.22.

8. The sliding ball type constant velocity joint of claim 7 , wherein the balls have the same PCD and size.

9. The sliding ball type constant velocity joint of claim 7 , wherein a ratio (f/PCD) of an offset (f) to PCD in each of the balls (D) is set to be in a range of between 0.02 and 0.11.

10. The sliding ball type constant velocity joint of claim 7 , wherein in order to secure the entire strength of the joint, a ratio (PCD/db) of PCD to a ball diameter (db) of each ball (D) is set to be in a range of between 3.4 and 5.1.

11. The sliding ball type constant velocity joint of claim 7 , wherein the inner race has ten track grooves formed on a spherical outer surface having an outer diameter (di) of the inner race to be parallel with a central axis, and in order to secure the durability of the joint and the strength of the cage, a ratio (di/PCD) of the outer diameter (di) to PCD is set to be in a range of between 0.9 and 1.11.

12. The sliding ball type constant velocity joint of claim 7 , wherein a ratio (dt/ds) of an outer diameter (dt) of the outer race to a serration pitch diameter (ds) of the inner race is set to be in a range of between 2.4 and 3.4.

Assignees

• Hyundai Wia Corp

Inventors

• Kim Pil Ki

Classifications

• F16D3/20

  one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members (F16D3/18, F16D3/24 take precedence) · CPC title

• F16D2003/22303

  Details of ball cages · CPC title

• F16D3/223 Primary

  the rolling members being guided in grooves in both coupling parts · CPC title

• Y10S464/906

  Torque transmitted via radially spaced balls · CPC title

• F16D3/22

  the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts · CPC title