KR20160143215A - Constant velocity joint - Google Patents

Constant velocity joint Download PDF

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Publication number
KR20160143215A
KR20160143215A KR1020150079597A KR20150079597A KR20160143215A KR 20160143215 A KR20160143215 A KR 20160143215A KR 1020150079597 A KR1020150079597 A KR 1020150079597A KR 20150079597 A KR20150079597 A KR 20150079597A KR 20160143215 A KR20160143215 A KR 20160143215A
Authority
KR
South Korea
Prior art keywords
joint member
ball
track grooves
torque transmitting
constant velocity
Prior art date
Application number
KR1020150079597A
Other languages
Korean (ko)
Inventor
이장선
김동진
정재승
Original Assignee
이래오토모티브시스템 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이래오토모티브시스템 주식회사 filed Critical 이래오토모티브시스템 주식회사
Priority to KR1020150079597A priority Critical patent/KR20160143215A/en
Publication of KR20160143215A publication Critical patent/KR20160143215A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/224—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22303—Details of ball cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22309—Details of grooves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • General Details Of Gearings (AREA)

Abstract

The constant velocity joint includes an outer joint member having a plurality of outer track grooves, an inner joint member having a plurality of inner track grooves paired with the plurality of outer track grooves to form a plurality of ball tracks, And a ball cage disposed between the outer joint member and the inner joint member and having a plurality of windows each of which receives the plurality of torque transmitting balls. Grease pockets may be formed on at least one of the bottom surface of the plurality of outer track grooves and the bottom surface of the plurality of inner track grooves.

Description

Constant velocity joint

The present invention relates to a constant velocity joint used for power transmission in a vehicle or the like.

The constant velocity joint includes an outer joint member and an inner joint member, and the outer joint member and the inner joint member each include a track groove. The track groove of the outer joint member and the track groove of the inner joint member are paired to form a ball track, and a torque transmitting ball for torque transmission is disposed in each ball track. And the torque transmitting ball is received in a ball cage disposed between the outer joint member and the inner joint member.

The torque transmitting ball moves along the ball track in accordance with the operation of the constant velocity joint. If sufficient lubrication is not performed at this time, the efficiency may be lowered and endurance problems due to abrasion may be caused.

US registered patent US 8,568,245 U.S. Published patent application US2012 / 0202607

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a constant velocity joint with improved lubricating action and durability.

A constant velocity joint according to an embodiment of the present invention includes an outer joint member having a plurality of outer track grooves, an inner joint member having a plurality of inner track grooves and a plurality of inner track grooves paired with the plurality of outer track grooves, A plurality of torque transmitting balls disposed in each of the plurality of ball tracks, and a ball cage disposed between the outer joint member and the inner joint member and having a plurality of windows each of which receives the plurality of torque transmitting balls do. Grease pockets may be formed on at least one of the bottom surface of the plurality of outer track grooves and the bottom surface of the plurality of inner track grooves.

The grease pocket may be formed so as not to contact the torque transmitting ball.

The grease pocket formed on the bottom surface of the outer track groove may be formed radially outward of the point where the torque transmitting ball contacts.

The outer joint member and the inner joint member are formed by forging and the grease pocket can be formed by the forging.

According to the present invention, since the grease pockets are formed on at least one of the bottom surface of the outer track groove and the bottom surface of the inner track groove, an effective lubrication action can be performed during the operation of the constant velocity joint, thereby improving the efficiency and durability .

1 is a front view schematically showing a constant velocity joint according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.
3 is a perspective view showing an inner joint member of a constant velocity joint according to an embodiment of the present invention.
4 is a perspective view illustrating an outer joint member of a constant velocity joint according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, a fixed constant velocity joint according to an embodiment of the present invention includes an outer joint member 10 and an inner joint member 20. The inner joint member 20 and the outer joint member 10 may be connected to the torque transmitting and driven elements, respectively. A depression is formed in the outer joint member 10, and the inner joint 20 is inserted into the depression.

The outer joint member 10 includes an inner surface 11 having a plurality of outer track grooves 13. On the other hand, the inner joint member 20 includes an outer surface 21 having a plurality of inner track grooves 23.

The outer track groove 13 and the inner track groove 23 are paired to form a plurality of ball tracks 130. For example, as shown in FIG. 1, eight outer track grooves 13 and eight inner track grooves 23 may be provided to form a total of eight ball tracks. However, the present invention is not limited to eight ball tracks but may be applied to six, nine, ten, twelve, etc. ball tracks.

A plurality of torque transmitting balls (30) are disposed in each of the plurality of ball tracks (130). For example, in the case where eight ball tracks are formed, eight torque transmission balls may be arranged in each of eight ball tracks one by one.

A ball cage 40 is disposed between the outer joint member 10 and the inner joint member 20. The ball cage (40) receives a plurality of torque transmitting balls (30). To this end, a plurality of windows 41 may be formed in the ball cage 40 along the circumferential direction, and the torque transmitting balls 30 may be inserted into the window 41, respectively. When the number of the ball tracks 130 is eight, the number of the window 41 of the ball cage 40 and the number of the torque transmitting balls 30 are eight.

According to an embodiment of the present invention, a grease pocket may be formed on at least one of the bottom surface 24 of the inner track groove 23 and the bottom surface 14 of the outer track groove 13 .

3 and 4, a grease pocket 25 may be formed on the bottom surface 24 of the inner track groove 23 of the inner joint member 20, and the outer joint member 10 may be formed, for example, The grease pocket 15 may be formed on the bottom surface 14 of the outer track groove 13 of the outer track groove 13.

By forming the grease pockets 15 and 25 the grease pockets 15 and 25 can contain grease and the grease contained in the grease pockets 15 and 25 allows the torque transmitting ball 30 and the outer The lubricating action between the joint member 10 and the inner joint member 20 can be effected effectively.

At this time, the grease pockets 15 and 25 may be formed so as not to be in contact with the torque transmitting balls 30. When the torque transmitting balls 30 are brought into contact with the grease pockets 15 and 25, generation of noise may cause generation of noise and deterioration of efficiency.

On the other hand, the grease pocket 25 formed on the bottom surface 24 of the outer track groove 23 can be formed radially outward of the point where the torque transmitting ball 30 contacts. For example, if the torque transmitting ball 30 is not in contact with the deepest portion of the outer track groove 23 and is tangent at two points inwardly spaced therefrom, the grease pocket 25 is in contact with the outer track groove 23 Can be formed radially outwardly of the bottom surface (24) where the torque transmitting ball (30) contacts. This is to prevent a reduction in efficiency due to centrifugal force.

On the other hand, the outer joint member 10 and the inner joint member 20 are formed by forging, and the grease pockets 15, 25 can be formed by forging. For example, protrusions corresponding to the grease pockets 15 and 25 are formed in the forging die for molding the outer joint member 10 and the inner joint member 20, and the grease pockets 15 , 25) can be formed. Thereby, the manufacturing process can be simplified.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

10: Outer joint member
13: Outer track groove
15: Grease pocket
20: inner joint member
23: Inner track groove
25: Grease pocket
130: Ball track
30: Torque transmission ball
40: Ball cage
41: Windows

Claims (4)

An outer joint member having a plurality of outer track grooves,
An inner joint member having a plurality of inner track grooves and a plurality of inner track grooves paired with each other to form a plurality of ball tracks,
A plurality of torque transmitting balls respectively disposed in the plurality of ball tracks, and
And a ball cage disposed between the outer joint member and the inner joint member and having a plurality of windows each of which receives the plurality of torque transmitting balls,
Wherein a grease pocket is formed in at least one of a bottom surface of the plurality of outer track grooves and a bottom surface of the plurality of inner track grooves. The method of claim 1,
Wherein the grease pocket is formed so as not to contact the torque transmitting ball. The method of claim 1,
Wherein a grease pocket formed on a bottom surface of the outer track groove is formed radially outward of a point where the torque transmitting ball contacts. The method of claim 1,
Wherein the outer joint member and the inner joint member are formed by forging and the grease pocket is formed by the forging.
KR1020150079597A 2015-06-05 2015-06-05 Constant velocity joint KR20160143215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150079597A KR20160143215A (en) 2015-06-05 2015-06-05 Constant velocity joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150079597A KR20160143215A (en) 2015-06-05 2015-06-05 Constant velocity joint

Publications (1)

Publication Number Publication Date
KR20160143215A true KR20160143215A (en) 2016-12-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150079597A KR20160143215A (en) 2015-06-05 2015-06-05 Constant velocity joint

Country Status (1)

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KR (1) KR20160143215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2704649C1 (en) * 2019-03-25 2019-10-30 Андрей Валентинович Гришаев Hinged joint of equal angular speeds

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120202607A1 (en) 2009-11-25 2012-08-09 Teruaki Fujio Fixed type constant velocity universal joint
US8568245B2 (en) 2009-10-08 2013-10-29 Ntn Corporation Fixed type constant velocity universal joint

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8568245B2 (en) 2009-10-08 2013-10-29 Ntn Corporation Fixed type constant velocity universal joint
US20120202607A1 (en) 2009-11-25 2012-08-09 Teruaki Fujio Fixed type constant velocity universal joint

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2704649C1 (en) * 2019-03-25 2019-10-30 Андрей Валентинович Гришаев Hinged joint of equal angular speeds

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E902 Notification of reason for refusal
E601 Decision to refuse application