Sliding ball type constant velocity joint for vehicles

Patent metadata

Field	Value
Publication number	US-2016201732-A1
Application number	US-201314910774-A
Country	US
Kind code	A1
Filing date	Aug 9, 2013
Priority date	Aug 9, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present invention relates to a sliding ball type constant velocity joint for a vehicle, which distributes the load concentrated on the balls by using ten balls, thereby reducing friction between the balls and an outer race track and an inner race track, and also decreasing idle vibration when applied to automatic transmission vehicles. The sliding ball type constant velocity joint for a vehicle comprises: 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

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; 10 balls for transmitting the rotational power of the outer race to the inner race; and a cage for supporting the 10 balls.

2 . The sliding ball type constant velocity joint of claim 1 , wherein the 10 balls have the same pitch circle diameter (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 10 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 outer race has 10 track grooves formed on the 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.

6 . The sliding ball type constant velocity joint of claim 1 , wherein the inner race has 10 track grooves formed on the 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.

7 . 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.

8 . 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 including a spherical portion and a linear portion;
a spherical inner surface including a spherical portion; and
a window grinding surface restricting the balls.

9 . The sliding ball type constant velocity joint of claim 1 , wherein the outer race having grooves used as track grooves on the inner surface of the outer race;

10 . The sliding ball type constant velocity joint of claim 8 , wherein the balls have the same pitch circle diameter (PCD) and size.

11 . The sliding ball type constant velocity joint of claim 8 , 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.

12 . The sliding ball type constant velocity joint of claim 8 , 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.

13 . The sliding ball type constant velocity joint of claim 8 , wherein the outer race has 10 track grooves formed on the 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.

14 . The sliding ball type constant velocity joint of claim 8 , wherein the inner race has 10 track grooves formed on the 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.

15 . The sliding ball type constant velocity joint of claim 8 , 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

• F16D2003/22303

  Details of ball cages · CPC title

• F16D3/223 Primary

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

• F16D2300/22

  Vibration damping · CPC title

• 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

• F16D3/227

  the joints being telescopic · CPC title