KR101673562B1 - Universal joint for vehicle - Google Patents

Universal joint for vehicle Download PDF

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Publication number
KR101673562B1
KR101673562B1 KR1020150064079A KR20150064079A KR101673562B1 KR 101673562 B1 KR101673562 B1 KR 101673562B1 KR 1020150064079 A KR1020150064079 A KR 1020150064079A KR 20150064079 A KR20150064079 A KR 20150064079A KR 101673562 B1 KR101673562 B1 KR 101673562B1
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KR
South Korea
Prior art keywords
needle bearing
joint
universal joint
elastic member
mounting groove
Prior art date
Application number
KR1020150064079A
Other languages
Korean (ko)
Inventor
김홍근
Original Assignee
주식회사 드림텍
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Filing date
Publication date
Application filed by 주식회사 드림텍 filed Critical 주식회사 드림텍
Priority to KR1020150064079A priority Critical patent/KR101673562B1/en
Application granted granted Critical
Publication of KR101673562B1 publication Critical patent/KR101673562B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/185—Steering columns yieldable or adjustable, e.g. tiltable adjustable by axial displacement, e.g. telescopically
    • 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
    • F16D3/202—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 one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—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 one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2057—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 one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having four or more pins, e.g. with compensation for relative pin movement
    • 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
    • F16D2003/22303—Details of ball cages

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Steering Controls (AREA)

Abstract

The present invention relates to a universal joint for a vehicle configured to be capable of operating with a resilient contact of a needle bearing mounted on a sliding cage when the universal joint slips or transmits a rotational torque.
A universal joint for an automobile according to the present invention is a needle bearing which is provided in a universal joint constituting an automotive steering apparatus and assembled so as to be able to slip in an axial direction and transmit torque, A needle bearing of a universal joint for an automobile comprising an elastic member mounted on an outer surface.

Description

Technical Field [0001] The present invention relates to a universal joint for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint for an automobile, and more particularly, to a universal joint for a vehicle configured to be able to operate while the universal joint is slid or transmits a rotation torque, will be.

Generally, the vehicle is provided with a steering device for the driver to change the traveling direction of the vehicle. The steering device includes a steering wheel installed at the front of the driver's seat to allow the driver to rotate the steering wheel, a steering column disposed at a lower portion of the steering wheel, and a control unit for switching the rotational motion of the steering wheel to rectilinear motion, And a universal joint for transmitting the rotational force transmitted to the steering column to the gear box.

The universal joint consists of a shaft joint and a pipe joint that is slidably movable to this shaft joint and assembled to transmit rotational torque.

A serration is formed in the longitudinal direction of the outer circumference of the shaft joint and a spline corresponding to the serration is formed on the inner side of the pipe joint so that the shaft joint is connected to the pipe joint by a gear engagement so as to slip in the axial direction, .

In order to smoothly and smoothly slip and move the shaft joint and the pipe joint when assembling the shaft joint and the pipe joint, a sliding cage composed of a ball bearing or a combination of a ball bearing and a needle bearing is provided on the outer side of the end portion of the shaft joint Assemble.

Then, a lubricant such as oil or grease is applied to the surface of the bearing assembled in the sliding cage, and such a shaft joint is inserted into the pipe joint and assembled.

However, if the sliding cage is made of a ball bearing or a combination of a ball bearing and a needle bearing, the universal joint can smoothly slip and move, but the ball bearing is in point contact so that indentation may occur in the shaft joint due to the ball, There arises a problem that the steering performance deteriorates.

As a prior art for solving such disadvantages, Patent Document 10-2014-0039660 has been proposed.

The prior art has a structure in which a needle bearing of a cylindrical shape is provided instead of a ball bearing so as to maintain the steering performance while eliminating the indentation of the slip bushing against the rotation torque of the steering apparatus.

However, when the universal joint is rotated by the operation of the steering wheel or when the shaft joint slips along the inside of the pipe joint, the needle bearing has a structure in which the entire outer surface of the needle bearing is in surface contact with the inner surface of the pipe joint. (Please specify if there are any other problems.)

For this reason, the slip operation and the rotation operation of the universal joint are not performed smoothly, so that the steering feel of the steering joint can not be maintained satisfactorily.

Also, as the use time of the steering device is accumulated, the needle bearing wears due to frictional resistance and torque transmission. Therefore, when the steering device is used, the clearance in the rotating direction of the steering wheel is increased so much that noise is generated and the steering performance is deteriorated.

Korean Patent Publication No. 10-2014-0039660

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a sliding type cage which can be operated while the universal joint slips or rotates, So as to provide a universal joint for a vehicle.

A universal joint for a vehicle proposed by the present invention is a needle bearing which is provided in a universal joint constituting an automotive steering apparatus and is slidable in an axial direction and assembled to transmit torque, A needle bearing of a universal joint for an automobile comprising an elastic member mounted on an outer surface of a main body.

A mounting groove is formed in the body along the peripheral surface, and an elastic member is mounted in the mounting groove. The mounting groove has a bottom surface formed in a straight shape, and both side surfaces extending from the bottom surface comprise an outwardly inclined surface.

The mounting groove is formed in a wedge shape, and the elastic member is formed in a coil spring shape. The elastic members are mounted with a slight gap from the bottom surface and both side surfaces of the mounting groove.

The outer diameters of both ends of the main body are smaller than the outer diameter of the main body, and the ends of both ends of the main body are curved.

The universal joint for a vehicle according to the present invention is characterized in that an elastic member made of a coil spring is provided along the outer side surface of the needle bearing body so that the elastic member elastically contacts the inner surface of the pipe joint when the universal joint slips or operates, Therefore, it is possible to prevent deterioration in the performance of the steering apparatus due to no needle bearing, inner side surface and clearance of the pipe joint, and maintain the steering feeling at the same condition as in the initial state at all times even if the use time of the steering apparatus is accumulated.

1 is a view showing a structure of a shaft joint constituting a universal joint to explain a universal joint for a vehicle according to the present invention.
2 is an assembled view of a universal joint for a vehicle according to the present invention.
3 is a perspective view of a sliding cage equipped with a needle bearing provided in a universal joint for a vehicle according to the present invention.
4 is a front view of a needle bearing provided in a universal joint for a vehicle according to the present invention.
5 is a view for explaining the structure of the needle bearing main body by removing the elastic member from the needle bearing of FIG.
6 is a partially enlarged cross-sectional view of Fig.
7 is an assembled cross-sectional view of a portion equipped with a needle bearing.
8 is an operational state diagram for explaining that the needle bearing is elastically contacted to the inside of the pipe joint when the universal joint for a vehicle according to the present invention is operated.

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

FIG. 1 is a view showing a structure of a shaft joint constituting a universal joint for a vehicle according to the present invention, FIG. 2 is an assembled view of a universal joint for a vehicle according to the present invention, FIG. 4 is a front view of a needle bearing provided in a universal joint for a vehicle according to the present invention, FIG. 5 is a view of the needle bearing of FIG. 4 with the elastic member removed, Fig. 6 is a partially enlarged cross-sectional view of Fig. 4, and Fig. 7 is a main partially assembled cross-sectional view.

As shown in the figure, a needle bearing provided in a universal joint for a vehicle according to the present invention is mounted on a sliding cage 500 assembled to a shaft joint S.

The shaft joint S includes a shaft portion 100 and a yoke portion 200. A plurality of serrations 110 are formed on the outer surface of the shaft portion 100 in the circumferential direction, A connection hole 210 is formed to connect another joint such as a connector.

A sliding cage 500 can be mounted on the end of the shaft joint S and a snap ring fixing groove 120 is formed at an end of the shaft portion 100 to fix the sliding cage 500 with the snap ring do.

2, the pipe joint P, which is a relative part to be assembled to the shaft joint S, includes a pipe portion 300 and a yoke portion 400. The inner surface of the pipe portion 300 is connected to the shaft joint S and a coupling hole 410 is formed in the yoke 400 to connect another joint such as a spider.

The spline 310 of the pipe joint P may be provided in such a manner that the spline 310 is formed inside the pipe portion 300 while the pipe portion 300 is formed.

A fixing groove 320 is formed on an end surface of the end portion of the pipe joint (P) pipe portion 300 so that it can be fixed to a fixed body or the like.

The shaft portion 110 of the shaft joint S is fitted into the pipe portion 300 of the pipe joint P to form a universal joint. When such a universal joint is mounted on a vehicle and used, The sliding cage 500 may be further assembled to the shaft portion 100 so that the sliding cage 500 can be smoothly slid.

The sliding cage 500 includes a sleeve 510 inserted into the shaft portion 100 of the shaft joint S as shown in FIGS. 2, 3 and 7 and a sleeve 510 extending in the longitudinal direction of the outer surface of the sleeve 510 And a needle bearing 600 fixed to the mounting portion 520 and in line contact with the inner surface of the pipe joint P. [

The mounting portion 520 on which the needle bearing 6000 is mounted is formed in a cylindrical shape. A mounting groove is formed in the mounting portion 520 so that the needle bearing 600 can be mounted on the mounting groove in an interference fit manner.

A groove 530 is formed in the mounting portion 520 along the longitudinal direction so that a lubricant such as grease or oil can flow or be stored.

The sliding cage 500 to which the needle bearing 600 is mounted can be fixed to the end of the shaft portion 100 of the shaft joint S by using a snap ring not shown in the snap ring fixing groove 120.

The needle bearings 600 are spaced apart from each other in a plurality of mounting portions 520.

The needle bearing 600 according to the present invention includes a needle bearing body 610 and an elastic member 620 mounted on the outer surface of the body 610.

The main body 610 has a cylindrical rod shape, and a mounting groove 630 is formed along the circumferential surface thereof. The elastic member 620 is mounted on the mounting groove 630. The mounting groove 630 is formed in a screw shape and the elastic member 620 is formed in a coil spring shape.

The mounting groove 630 includes a bottom surface 640 and a side surface 650 extending upward from both sides of the bottom surface 640. The bottom surface 640 is formed in a straight line shape, Outwardly inclined surface.

The side surface 650 of the mounting groove 630 is formed as an outwardly inclined surface so that when the shaft joint S and the pipe joint P of the universal joint slip or operate at a torque, the elastic member 620 of the needle bearing elastically deforms slightly And a space that can be flowed one by one.

The elastic member 620 is mounted with a slight gap from the bottom surface 640 and both side surfaces 650 of the mounting groove 630. Therefore, when the shaft joint S and the pipe joint P slip or transmit torque, the elastic member 620 of the needle bearing can be moved under the elastic force. Accordingly, the elastic member 620 may be manufactured so as to be mounted with a slight gap maintained in the groove 630 of the needle body 610.

The elastic member 620 of the needle bearing elastically contacts the inner surface of the pipe joint P when the shaft joint S and the pipe joint P slip or transmit torque.

Therefore, when the shaft joint S and the pipe joint P of the universal joint slip or transmit a rotational torque, the outward elasticity of the elastic member 620 of the needle bearing is always applied so that the entire outer surface of the elastic member 620 Thereby minimizing the friction coefficient and eliminating the occurrence of a gap that may occur between the inner surface of the pipe joint P and the inner surface of the pipe joint P while minimizing the friction coefficient .

As a result, it is possible to prevent deterioration in the performance of the steering apparatus due to no occurrence of side surfaces and clearances in the needle bearings 600 and the pipe joint P, and to maintain the steering feel always in a good condition as in the initial state .

The outer diameter B of both ends of the main body 610 is smaller than the outer diameter A of the main body 610 so that the needle bearings 600 are inserted into the mounting portions 520 of the sliding cage 500, And it is possible to reduce the tip frictional resistance of the needle bearing 600 when the shaft joint S slips along the pipe joint P. [

Both end portions of the main body 610 of the needle bearing 600 are formed of a curved surface 660 so that the needle bearing 600 can be mounted more easily when the needle bearing 600 is mounted on the mounting portion 520 in an interference fit manner.

2 and 7, the universal joint for a vehicle provided with the needle bearing described above is assembled with the sliding cage 500 at the end of the shaft portion 100 of the shaft joint S, As shown in Fig.

The shaft joint S and the pipe joint P thus assembled are capable of slipping in the axial direction while allowing the serrations 110 and the splines 310 to transmit rotational torque through the sliding cage 500.

Another joint such as a spider is connected to the connection hole 210 formed in the yoke portion 200 of the shaft joint S and assembled to the steering column constituting the steering apparatus of the automobile. 400 are connected to another joint such as a spider and used in a gear box constituting a steering apparatus of an automobile.

Since the needle bearing 600 provided in the sliding cage 500 has a structure provided with an elastic member 620 formed of a coil spring outside the needle body 610, the shaft joint S and the pipe joint P are slip- The entire outer surface of the elastic member 620 of the needle bearing elastically contacts the inner surface of the pipe joint P in slip motion or transmits the rotation torque when the rotation torque is transmitted.

6, the elastic member 620 of the needle bearing 600 is not brought into contact with the mounting groove 630 of the needle bearing body 610, The outer surface of the elastic member 620 of the needle bearing 600 is in contact with the inner surface of the spline 310 of the pipe joint P so that the pipe joint P contacts the shaft joint S, As shown in Fig.

When the torque is applied to the universal joint due to the rotation of the steering device, the shaft joint S and the pipe joint P are twisted so that the outer diameter of the elastic member 620 of the needle bearing 600 is reduced to the pipe joint P The spline 310 of the pipe joint P is pressed against the surface of the needle bearing body 610 and the elastic member 620 while compressing the elastic member 620 of the needle bearing 600, So that the inner surface of the inner surface is closely contacted with the inner surface of the inner surface of the body. Since the pipe joint P receives the outward elasticity of the elastic member 620 and the torque is transmitted while the surface of the pipe joint P is in contact with the surface of the pipe joint P, no indentation occurs. At this time, the elastic member 620 is inserted into the mounting groove 630 of the needle bearing body 610, So that the gap is maintained.

When the torque is released, the elastic member 620 repeats the process of restoring the elastic member 620 to the original state by the outward elasticity. Accordingly, the elastic member 620 contacts the mounting groove 630 even if the universal joint slips So that they are elastically positioned in a state of slightly spaced apart.

Accordingly, since the universal joint operates while receiving the elastic force of the elastic member 620 at all times, a clearance that may occur between the needle bearing 600 and the inner surface of the pipe joint P is not generated, thereby preventing the performance degradation of the steering apparatus, The steering feeling can always be maintained as good and equal to the initial state.

While the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

S: Shaft joint P: Pipe joint
100: shaft portion 110: serration
120: snap ring fixing groove 200, 400: yoke portion
210, 410: connection hole 300: pipe section
310: Spline 320: Fixing groove
500: sliding cage 510: sleeve
520: mounting portion 530: groove
600: Needle bearing 610: Body
620: elastic member 630: mounting groove
640: bottom surface 650: side surface
660: Surface

Claims (7)

1. A needle bearing which is provided in a universal joint constituting a steering apparatus for an automobile and assembled so as to be able to slip in an axial direction and transmit torque,
Wherein the needle bearing comprises a body and an elastic member mounted on an outer surface of the body,
Wherein the needle bearing body is formed with a mounting groove along a circumferential surface thereof, and an elastic member is mounted on the mounting groove. delete The method according to claim 1,
Wherein the mounting groove has a bottom surface in the shape of a straight line, and both side surfaces extending from the bottom surface are formed in an outwardly inclined surface. The method according to claim 1,
Wherein the mounting groove is formed in a wedge shape, and the elastic member is in the form of a coil spring. The method of claim 3,
Wherein the elastic member is mounted on the bottom surface and both side surfaces of the mounting groove with a slight gap therebetween. The method according to claim 1,
Wherein an outer diameter of both ends of the needle bearing body is smaller than an outer diameter of the main body. The method of claim 6,
Wherein the end portions of both ends of the needle bearing body are curved.
KR1020150064079A 2015-05-07 2015-05-07 Universal joint for vehicle KR101673562B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150064079A KR101673562B1 (en) 2015-05-07 2015-05-07 Universal joint for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150064079A KR101673562B1 (en) 2015-05-07 2015-05-07 Universal joint for vehicle

Publications (1)

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KR101673562B1 true KR101673562B1 (en) 2016-11-07

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Application Number Title Priority Date Filing Date
KR1020150064079A KR101673562B1 (en) 2015-05-07 2015-05-07 Universal joint for vehicle

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090083632A (en) * 2008-01-30 2009-08-04 주식회사 만도 Universal joint for steering apparatus
KR20140039660A (en) 2012-09-24 2014-04-02 주식회사 드림텍 Shaft joint of universal joint for vehicle and manufacturing method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090083632A (en) * 2008-01-30 2009-08-04 주식회사 만도 Universal joint for steering apparatus
KR20140039660A (en) 2012-09-24 2014-04-02 주식회사 드림텍 Shaft joint of universal joint for vehicle and manufacturing method thereof

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