KR101766080B1 - Apparatus for supporting steering - Google Patents

Apparatus for supporting steering Download PDF

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Publication number
KR101766080B1
KR101766080B1 KR1020150174768A KR20150174768A KR101766080B1 KR 101766080 B1 KR101766080 B1 KR 101766080B1 KR 1020150174768 A KR1020150174768 A KR 1020150174768A KR 20150174768 A KR20150174768 A KR 20150174768A KR 101766080 B1 KR101766080 B1 KR 101766080B1
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KR
South Korea
Prior art keywords
rack bar
eccentric ring
bearing
bearing housing
axial center
Prior art date
Application number
KR1020150174768A
Other languages
Korean (ko)
Other versions
KR20170068652A (en
Inventor
김종민
이규완
알란 하셀트 패트릭
Original Assignee
현대자동차주식회사
기아자동차주식회사
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Filing date
Publication date
Application filed by 현대자동차주식회사, 기아자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020150174768A priority Critical patent/KR101766080B1/en
Publication of KR20170068652A publication Critical patent/KR20170068652A/en
Application granted granted Critical
Publication of KR101766080B1 publication Critical patent/KR101766080B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B62D3/12—Steering gears mechanical of rack-and-pinion type
    • B62D3/126—Steering gears mechanical of rack-and-pinion type characterised by the rack
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/26—Racks
    • F16H55/28—Special devices for taking up backlash
    • F16H55/283—Special devices for taking up backlash using pressure yokes
    • F16H55/285—Special devices for taking up backlash using pressure yokes with rollers or balls to reduce friction

Abstract

The present invention relates to a bearing housing for mounting a rack bar while maintaining a rack bar supporting function by adjusting a radius of a bearing housing for supporting the rack bar, the bearing housing being provided to surround the rack bar at least three points along the longitudinal direction of the rack bar; A plurality of eccentric rings are provided between the rack bar and the bearing housing to support the rack bar and a radial length from the axial center of the rack bar to the inner circumferential surface of the bearing housing can be adjusted through positional adjustment in accordance with rotation of the eccentric ring A radial adjustment assembly is disclosed that incorporates a steering rack bar support apparatus.

Description

[0001] APPARATUS FOR SUPPORTING STEERING [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a steering rack bar supporting apparatus, and more particularly, to a steering rack bar supporting apparatus which can mount a rack bar while maintaining a rack bar supporting function by adjusting a radius of a bearing housing supporting the rack bar.

A steering gear is used to convert the rotational force applied to the steering wheel to a steerable steering torque to turn the wheel, and a rack-and-pinion type is used as a typical steering gear type.

For example, the physical steering force of the steering wheel is transmitted to the pinion via the torsion bar. The pinion is engaged with the rack formed in the rack bar, and the rack bar can be moved to both ends in the axial direction by the driving force transmitted to the pinion.

At this time, the rack housing is provided in a shape to enclose the rack bar, and a bearing is provided in the rack housing to support the axial movement of the rack bar.

In the conventional case, bearings are provided at only one of two points along the longitudinal direction of the rack housing to support the rack bars, and no bearing is provided at the other side.

However, in such a steering system, since there is no bearing seat on the other side, there is a problem that the strength of the rack assembly is lowered because it is difficult to firmly support the movement of the rack bar, and when a force is transmitted to the rack bar in reverse on the wheel side, The entire suspension can be elastically deformed while the other rack bar point is moved in the radial direction by the force.

Further, when such elastic deformation occurs, in a steering system having a hydraulic power steering function, the torsion bar itself of the power steering valve is operated abnormally, so that the hydraulic pressure is supported even if additional power steering hydraulic pressure is not required, There is also a problem in that the hydraulic pressure of the engine is supported.

Thus, there is a need for a structure for reinforcing the entire rack assembly and preventing deformation of the suspension.

To this end, it is conceivable to increase the number of bearings for supporting the rack bars. However, in this case, the rack bars are excessively restrained, which makes it difficult to mount the rack bars.

In other words, since it is impossible to make a perfectly straight bar due to the manufacturing process and tolerance (heat treatment) of the rack bar, there is a problem of straightness of the rack bar, and manufacturing tolerances of other parts (tolerance of concentricity of the housing such as a bearing seat) It becomes impossible to do.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KR 10-2015-0061428 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to provide a steering rack bar supporting device which can mount a rack bar while maintaining a rack bar supporting function by adjusting a radius inside a bearing housing for supporting the rack bar There is.

According to an aspect of the present invention, there is provided a rack structure including: a bearing housing provided to surround a rack bar at least three points along a longitudinal direction of the rack bar; A plurality of eccentric rings are provided between the rack bar and the bearing housing to support the rack bar and a radial length from the axial center of the rack bar to the inner circumferential surface of the bearing housing can be adjusted through positional adjustment in accordance with rotation of the eccentric ring And a radial adjustment assembly.

Wherein the radial adjustment assembly includes: a bearing provided in a shape to enclose the rack bar and having an axial center eccentrically from an axial center of the rack bar; An inner eccentric ring provided to surround the bearing; And an outer eccentric ring which is provided in a shape to surround the inner eccentric ring between the inner eccentric ring and the bearing housing and whose axial center is eccentric from the axial center of the inner eccentric ring.

An axial center formed by the inner peripheral surface of the bearing is formed to be eccentric with respect to an axial center formed by the outer peripheral surface of the bearing; The axial center of the outer eccentric ring formed by the inner peripheral surface of the outer eccentric ring is eccentric with respect to the axial center formed by the outer peripheral surface of the outer eccentric ring.

Grooves and projections corresponding to each other along the circumferential direction can be formed on the outer circumferential surface of the bearing and the inner circumferential surface of the inner inner ring.

A stepped portion is formed on the inner circumferential surface of the bearing housing so as to form a cross-sectional shape; Wherein an outer circumferential surface of the outer eccentric ring is in close contact with an inner circumferential surface of the bearing housing so that an outer surface of the assembly supporting portion is brought into close contact with the step portion while the outer circumferential surface of the outer eccentric ring is in close contact with the inner circumferential surface of the bearing housing; The outer peripheral surface of the inner eccentric ring and the inner peripheral surface of the inner eccentric ring are in close contact with the inner peripheral surface of the outer eccentric ring and the inner surface of the assembly supporting portion, respectively; A locking ring is provided to surround the inner surface of the bearing housing; The locking ring is brought into close contact with the other side surface of the inner eccentric ring, thereby assembling the radial adjustment assembly.

The radial adjustment assembly may be provided in one or more bearing housings.

It is an object of the present invention to provide a rack assembly capable of mounting a rack bar while maintaining a stable rack bar supporting function by adjusting a radius of the inside of a bearing housing for supporting the rack bar and also improving the overall rigidity of the rack assembly, And the hydraulic power supply of the power steering.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining positions of bearings provided in a rack housing according to the present invention; FIG.
2 is a circumferential cutaway view of a bearing housing and radial adjustment assembly assembled in a rack housing of the present invention.
3 is an axial cutaway view of a bearing housing and radial adjustment assembly incorporated into the rack housing of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The steering racking bar supporting device of the present invention can largely comprise a bearing housing 5 and a radius adjusting assembly.

The bearing housing 5 may be provided to cover the rack bar 3 at least three points along the longitudinal direction of the rack bar 3. [

1, the bearing housing 5 is provided between the rack housing 1 and the rack bar 3 to support the rack bar 3 which moves in the axial direction. The rack housing 1 includes a rack housing 1, The other side, and the three points of interruption.

The radial adjustment assembly includes a plurality of eccentric rings provided between the rack bar 3 and the bearing housing 5 to support the rack bars 3 and adjust the position of the rack bars 3 by rotation of the eccentric rings. The length in the radial direction from the center of the direction to the inner circumferential surface of the bearing housing 5 can be adjusted.

2 and 3, a configuration of the radius adjusting assembly will be described in detail. A bearing 7 is provided to surround the rack bar 3, and the axial center of the bearing 7, Can be provided eccentrically from the axial center of the shaft 3. Here, the bearing 7 may be a sliding bearing or a spherical bearing.

An inner eccentric ring 9 may be provided to surround the outer circumferential surface of the bearing 7. At this time, grooves (9a) and projections (7a) corresponding to each other along the circumferential direction are formed and assembled to the outer circumferential surface of the bearing (7) and the inner circumferential surface of the inner inner ring, (7) are rotatable together.

An outer eccentric ring 11 is provided between the inner eccentric ring 9 and the bearing housing 5 so as to surround the outer peripheral surface of the inner eccentric ring 9, Can be provided eccentrically from the axial center of the inner eccentric ring (9).

The radial length of the rack bar 3 is adjusted by the radial adjustment assembly in the axial direction of the rack housing 3 due to the warped shape of the rack bar 3 or the manufacturing tolerance of other components. The outer eccentric ring 11 is first mounted in the bearing housing 5 and then the outer eccentric ring 11 is rotated to hold the position of the outer eccentric ring 11 and then the inner eccentric ring 9 And the bearing 7 are mounted in the outer eccentric ring 11 and then the inner eccentric ring 9 is rotated to position the inner eccentric ring 9.

That is, the outer eccentric ring 11 is eccentric with respect to the inner eccentric ring 9 and the bearing 7 provided in the inner eccentric ring 9 is eccentric with respect to the rack bar 3, The radial length from the axial center of the bearing 7 to the outer peripheral surface of the outer eccentric ring 11 can be freely adjusted according to the position where the rotation of the inner eccentric ring 11 and the inner eccentric ring 9 is fixed afterwards.

Therefore, even if the axial center of the rack bar 3 is eccentric with respect to the axial center of the bearing housing 5 at the position of the bearing housing 5, the rotation of the outer eccentric ring 11 and the inner eccentric ring 9 The axial center of the bearing 7 can be aligned with the axial center of the rack bar 3 through the adjustment of the radial length between the rack bar 3 and the bearing housing 5 so that the rack bar 3 can be stably supported So that the mounting of the rack bar 3 into the bearing housing 5 becomes possible.

Particularly, according to the present invention, since the radial length between the rack bar 3 and the bearing housing 5 is adjusted by individually rotating the two eccentric rings, the radial length of the eccentric ring can be freely adjusted, Even when the axial center of the rack bar 3 and the axial center of the bearing housing 5 coincide with each other before the assembly, the axial center of the bearing 7 can be aligned with the axial center of the rack bar 3 (Ie, the axial center of the bearing can be steplessly adjusted from 0 to 0.6 mm with respect to the axial center of the rack bar)

In the present invention, the axial center formed by the inner circumferential surface of the bearing 7 is eccentric with respect to the axial center formed by the outer circumferential surface of the bearing 7, so that the bearing (7) 7 may be provided with an eccentric center in the axial direction.

That is, the center of the circle formed by the inner peripheral surface of the bearing 7 forms the radial length of the bearing 7 so as to be eccentric to the center of the circle formed by the outer peripheral surface.

The axial center of the outer eccentric ring 11 is eccentric with the axial center of the outer eccentric ring 11 so that the axial center of the inner eccentric ring 11 The axial center of the outer eccentric ring 11 can be eccentrically disposed.

That is, the radius of the outer eccentric ring 11 is formed so that the center of the circle formed by the inner peripheral surface of the outer eccentric ring 11 becomes eccentric with respect to the center of the circle formed by the outer peripheral surface.

In addition, in the present invention, the bearing 7, the inner eccentric ring 9 and the outer eccentric ring 11 can be mounted inside the bearing housing 5 by the locking ring 13.

For example, referring to FIG. 3, the step portion 5a may be formed on the inner circumferential surface of the bearing housing 5 so as to have a cross-sectional shape.

The assembly supporting portion 11a may be formed to protrude from the inner peripheral surface of the outer eccentric ring 11 so as to have a bent shape in cross section. At this time, the outer eccentric ring 11 may be assembled such that the outer circumferential surface of the outer eccentric ring 11 is closely contacted with the inner circumferential surface of the bearing housing 5, and the outer surface of the assembly supporting portion 11a is closely contacted with the flange portion constituting the step portion 5a. have.

The outer eccentric ring 9 and one side of the inner eccentric ring 9 may be closely attached to the inner peripheral surface of the outer eccentric ring 11 and the inner surface of the assembly supporting portion 11a.

Particularly, a locking ring 13 is provided on the other side of the inner eccentric ring 9 so as to surround the inner surface of the bearing housing 5, and the locking ring 13 is in close contact with the other side surface of the inner eccentric ring 9 So that the radial adjustment assembly can be assembled into the bearing housing 5.

That is, when the locking ring 13 is assembled so as to push the inner eccentric ring 9 in the axial direction, one side of the inner eccentric ring 9 is brought into close contact with the assembly supporting portion 11a of the outer eccentric ring 11, And the assembly supporting portion 11a is brought into close contact with the step portion 5a, so that the radius adjusting assembly can be assembled.

In addition, the radial adjustment assembly may be provided within one or more bearing housings 5.

For example, when the three bearing housings 5 are mounted, the radius adjusting assembly may affect the bending of the rack bar 3 and manufacturing tolerances of the components, even if the radial adjusting assembly is mounted on only one of the two ends of the three bearing housings 5 It is possible to mount the rack bar 3 without receiving it.

As described above, according to the present invention, by controlling the radius of the inside of the bearing housing 5 supporting the rack bar 3, it is possible to mount the rack bar 3 while stably maintaining the function of supporting the rack bar 3, It is possible to increase the overall rigidity and to prevent the suspension from being deformed and the power supply malfunction of the power steering.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the specific embodiments set forth herein; rather, .

1: rack housing 3: rack bar
5: Bearing housing 5a:
7: bearing 7a: projection
9: Inner eccentric ring 9a: Groove 0
11: external eccentric ring 11a:
13: Locking ring

Claims (6)

A bearing housing enclosing the rack bar;
A plurality of eccentric rings are provided between the rack bar and the bearing housing to support the rack bar and a radial length from the axial center of the rack bar to the inner circumferential surface of the bearing housing can be adjusted through positional adjustment in accordance with rotation of the eccentric ring A radial adjustment assembly,
The radial adjustment assembly includes:
A bearing which is provided in a shape to surround the rack bar and whose axial center is eccentrically disposed from the axial center of the rack bar;
An inner eccentric ring provided to surround the bearing; And
And an outer eccentric ring which is provided between the inner eccentric ring and the bearing housing to surround the inner eccentric ring and whose axial center is eccentric from the axial center of the inner eccentric ring,
A stepped portion is formed on the inner circumferential surface of the bearing housing so as to form a cross-sectional shape;
Wherein an outer circumferential surface of the outer eccentric ring is in close contact with an inner circumferential surface of the bearing housing so that an outer surface of the assembly supporting portion is brought into close contact with the step portion while the outer circumferential surface of the outer eccentric ring is in close contact with the inner circumferential surface of the bearing housing;
The outer peripheral surface of the inner eccentric ring and the inner peripheral surface of the inner eccentric ring are in close contact with the inner peripheral surface of the outer eccentric ring and the inner surface of the assembly supporting portion, respectively;
A locking ring is provided to surround the inner surface of the bearing housing;
Wherein the locking ring is in close contact with the other side surface of the inner eccentric ring to assemble the radial adjustment assembly. delete The method according to claim 1,
An axial center formed by the inner peripheral surface of the bearing is formed to be eccentric with respect to an axial center formed by the outer peripheral surface of the bearing;
Wherein an axial center of the inner circumferential surface of the outer eccentric ring is eccentric with respect to an axial center of the outer circumferential surface of the outer eccentric ring. The method according to claim 1,
Wherein grooves and projections corresponding to each other along the circumferential direction are formed on the outer circumferential surface of the bearing and the inner circumferential surface of the inner inner ring. delete The method according to claim 1,
Wherein the bearing housing is provided at a plurality of points along a longitudinal direction of the rack bar;
Wherein the radial adjustment assembly is provided in one or more bearing housings.
KR1020150174768A 2015-12-09 2015-12-09 Apparatus for supporting steering KR101766080B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150174768A KR101766080B1 (en) 2015-12-09 2015-12-09 Apparatus for supporting steering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150174768A KR101766080B1 (en) 2015-12-09 2015-12-09 Apparatus for supporting steering

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KR20170068652A KR20170068652A (en) 2017-06-20
KR101766080B1 true KR101766080B1 (en) 2017-08-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102478053B1 (en) * 2017-09-19 2022-12-16 현대자동차주식회사 Damping device for steering system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012236489A (en) * 2011-05-11 2012-12-06 Jtekt Corp Rack shaft support device and steering device for vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012236489A (en) * 2011-05-11 2012-12-06 Jtekt Corp Rack shaft support device and steering device for vehicle

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