KR101569761B1 - Steering apparatus for vehicle - Google Patents

Steering apparatus for vehicle Download PDF

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Publication number
KR101569761B1
KR101569761B1 KR1020140069170A KR20140069170A KR101569761B1 KR 101569761 B1 KR101569761 B1 KR 101569761B1 KR 1020140069170 A KR1020140069170 A KR 1020140069170A KR 20140069170 A KR20140069170 A KR 20140069170A KR 101569761 B1 KR101569761 B1 KR 101569761B1
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KR
South Korea
Prior art keywords
rack
circumferential surface
rack housing
coupled
outer circumferential
Prior art date
Application number
KR1020140069170A
Other languages
Korean (ko)
Inventor
김경민
Original Assignee
주식회사 만도
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Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020140069170A priority Critical patent/KR101569761B1/en
Application granted granted Critical
Publication of KR101569761B1 publication Critical patent/KR101569761B1/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
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a 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
    • F16H57/00—General details of gearing
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise

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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)
  • Transmission Devices (AREA)

Abstract

The present invention relates to a steering apparatus for a vehicle. According to an embodiment of the present invention, provided is a steering apparatus for a vehicle, which comprises: a pressurization member provided to be inserted into a coupling hole penetrating an outer circumferential surface and an inner circumferential surface of a rack housing to pressurize and support a rack bush supported by and coupled to an inner side in an end portion of the rack housing to an inner side in a radial direction; a fastening member coupled to an outer circumferential surface of the rack housing, and pushing the pressurization member to an inner side in a radial direction while being rotated in a circumferential direction; a support member spaced from the fastening member to be coupled to an outer circumferential surface of the rack housing; and an elastic member provided between the support member and the fastening member, and providing a rotational force in a circumferential direction to the fastening member.

Description

[0001] Steering apparatus for vehicle [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus for an automobile, and more particularly, to a steering apparatus for an automobile which can adjust the operating load of the rack bar by adjusting the clamping force of the rack bush and reduce the rattle noise generated at the rack- will be.

1 is a partial sectional view showing a rack-and-pinion type steering apparatus of a conventional automobile.

As shown in FIG. 1, a gear box 125 connected to the rack housing 137 is provided on the lower side of the steering wheel 110 and the steering shaft 115 in the conventional rack-pinion type steering apparatus.

The gear box 125 is provided with an input shaft 120 connected to the steering shaft 115 at an inner upper side thereof to receive the rotational force generated by the steering wheel 110.

A gear box 125 is provided at the lower side of the gear box 125 with a pinion (not shown) which is rotated by a rotational force transmitted through the input shaft 120 and has teeth at the outer periphery thereof. And a rack housing 137 extending in both directions.

The rack housing 137 is formed as a hollow tube with both sides opened. Rack bushes 160 and a rack stopper 165 are provided on both sides of the opened inlet, and a bellows 150 is installed on the outer peripheral side.

The rack housing 137 is provided with a rack bar 140 having a rack so as to be coupled with a pinion provided in the gear box 125.

The rack bar 140 is linearly moved in the axial direction inside the rack housing 137 and is racked so that it can be engaged with the pinion of the gear box 125. The left and right sides of the rack bar 140, The ball is connected to the tie rod 155 through the inner ball joint 170 to which the ball is inserted and coupled.

Rack bushes 160 are provided on both sides of the opened rack housing 137 to guide the movement of the rack bars 140 while supporting the rack bars 140.

The rack bush 160 is hollow and the outer circumferential surface of the rack bush 160 closely contacts the inner circumferential surface of the rack housing 137 and the step portion 135. The inner circumferential surface of the rack bush 160 closely contacts the outer circumferential surface of the rack 140, And the rack stopper 165 is coupled to the rack housing 137 at the opposite end.

A rack stopper 165 is formed at the end of the rack bushing 160 so as to be hermetically closed so that the rack housing 137 can be hermetically sealed and fixed to the inner circumferential surface of the rack housing 137 while being in close contact with the rack bush 160 So that the rack bush 160 is supported.

On the other hand, an elastic ring (not shown) is further coupled to the outer circumferential surface of the rack bush 160 so that shock between the rack bush 160 and the rack housing 137 is buffered.

However, in the conventional rack-pinion type steering apparatus of this type, when the vehicle runs on an irregular road surface in a state in which wear is generated in the rack bush as the durability progresses, the reverse input load of the rack is transmitted through the tie rod At this time, a rattle noise is generated due to a gap between the rack bush 160 and the rack housing 137, causing discomfort to the driver and reducing steering stability.

The object of the present invention is to provide a steering apparatus for an automobile which can control the operating load of the rack bar by adjusting the clamping force of the rack bush and reduce the rattle noise generated at the rack bush connecting portion have.

The objects of the present invention are not limited thereto, and other objects not mentioned may be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, a pressing member is provided to be fitted in a coupling hole penetrating an outer circumferential surface and an inner circumferential surface of a rack housing so as to press and support a rack bush supported in an end portion of a rack housing and radially inwardly coupled thereto. A tightening member coupled to an outer circumferential surface of the rack housing, the tightening member rotating in a circumferential direction and pushing the pressing member inward in the radial direction; A support member spaced apart from the tightening member and coupled to the outer circumferential surface of the rack housing; And an elastic member provided between the support member and the tightening member, the elastic member providing a circumferential rotational force to the tightening member.

According to the embodiment of the present invention, the operating load of the rack bar can be adjusted by adjusting the tightening force of the rack bush, and the rattle noise generated at the rack bar connecting portion can be reduced.

1 is a partial sectional view showing a rack-and-pinion type steering apparatus of a conventional automobile.
2 is a perspective view of a part of a steering apparatus for an automobile according to an embodiment of the present invention.
FIG. 3 is a partially exploded perspective view of FIG. 2. FIG.
Fig. 4 is a sectional view of Fig. 2. Fig.
Figure 5 is a side view of Figure 2;
6 is a perspective view of a part of a steering apparatus for a vehicle according to another embodiment of the present invention.
Fig. 7 is a sectional view of Fig. 6. Fig.
8 is a side view of Fig. 6. Fig.
FIG. 9 is a graph showing a change in the operating load of the rack bar by adjusting the clamping force of the rack bush according to the embodiment of the present invention.
FIG. 10 is a graph showing a change in the rattle noise generated in the rack bushing region according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When an element is described as being "connected", "coupled" or "connected" to another element, It should be understood that although components may be directly connected or connected, other components may be "connected "," coupled "or" connected "between each component.

2 is a perspective view of a part of a steering apparatus for an automobile according to an embodiment of the present invention. FIG. 3 is a partially exploded perspective view of FIG. 2. FIG. Fig. 4 is a sectional view of Fig. 2. Fig. Figure 5 is a side view of Figure 2; 6 is a perspective view of a part of a steering apparatus for a vehicle according to another embodiment of the present invention. Fig. 7 is a sectional view of Fig. 6. Fig. FIG. 9 is a graph showing a change in the operating load of the rack bar by adjusting the clamping force of the rack bush according to the embodiment of the present invention. FIG. 10 is a graph showing a change in the rattle noise generated in the rack bushing region according to the embodiment of the present invention.

As shown in these drawings, a steering apparatus for an automobile according to an embodiment of the present invention includes a rack housing 201, which is supported inside the end portion of the rack housing 201 and presses and supports the coupled rack bush 301 inward in the radial direction A pressing member 305 fitted in a coupling hole 303 penetrating the outer peripheral surface and the inner peripheral surface of the rack housing 201; A tightening member 203 coupled to the outer circumferential surface of the rack housing 201 and rotating in the circumferential direction to push the pressing member 305 inward in the radial direction; A supporting member 205 separated from the tightening member 203 and coupled to the outer circumferential surface of the rack housing 201; And an elastic member 207 provided between the support member 205 and the tightening member 203 and providing a circumferential rotational force to the tightening member 203.

The rack bush 301 is supported and coupled inside the end of the rack housing 201. The rack bush 301 is coupled to the outer circumferential surface of the rack bar 209 to support the rack bar 209, And guides the linear motion.

On the other hand, an elastic ring 401 is provided on the outer circumferential surface of the rack bush 301 to buffer shock between the rack housing 301 and the rack housing 201 due to the flow of the rack bar 209.

The rack housing 201 is formed with a coupling hole 303 penetrating the outer circumferential surface and the inner circumferential surface so as to press and support the rack bush 301 inward in the radial direction. Respectively.

Here, the pressing member 305 may be provided, for example, as a ball-shaped member, and may be made of a steel material.

Then, the tightening member 203 is coupled to the outer circumferential surface of the rack housing 201, and the tightening member 203 is rotated in the circumferential direction to push the pressing member 305 inward in the radial direction.

More specifically, the fastening member 203 is ring-shaped and has a plurality of guide grooves 307 spaced circumferentially on the inner circumferential surface thereof.

The guide groove 307 is formed such that the radial depth gradually increases from one circumferential side to the other side so that the urging member 203 can be pressed inward in the radial direction as the pressing member 305 is rotated in the circumferential direction do.

5, the radial depth of the guide groove 307 is gradually increased from one side in the circumferential direction to the other side, so that the assembly initial pressing member 305 is inserted into the guide groove 307 When the inner circumferential surface of the rack bush 301 is worn as the durability progresses, the fastening member 203 is rotated counterclockwise by the elastic force of the elastic member 207, which will be described later, The pressing member 305 is pushed by the guide groove 307 whose depth gradually decreases to press the rack bush 301 inward in the radial direction to compensate for the clearance between the rack bush 301 and the rack bar 209 do.

The opposite side surfaces of the guide groove 307 in the axial direction opposite to the direction toward the support member 205 are open so that the guide grooves 307 The fastening member 203 is inserted into the rack housing 201 by the guide groove 307 being formed in such a manner that the side surface of the fastening member 203 is formed by the stepped surface 309, The pressing member 305 is easily moved to the inside of the guide groove 307 through the opened side face of the guide groove 307 when the pressing member 305 is pushed in after the pressing member 305 is inserted into the engaging hole 303 .

After the pressing member 305 is seated in the guide groove 307, the stepped surface 309 of the guide groove 307 causes the fastening member 203 to be caught by the pressing member 305, Is not released.

The support member 205 is connected to the outer circumferential surface of the rack housing 201 so as to be spaced apart from the tightening member 203. The support member 205 is provided as a ring- As shown in Fig.

The fixing member 403 is coupled to the outer circumferential surface of the rack housing 201 so as to support both sides or one side in the axial direction of the supporting member 205.

The fixing member 403 functions to support the support member 205 in the axial direction.

The elastic member 207 is then provided between the support member 205 and the tightening member 203 and provides a circumferential rotary force to the tightening member 203 which is provided by a torsion spring .

At the initial stage of assembly in which the pressing member 305, the fastening member 203 and the supporting member 205 are mounted, the elastic member 207 is compressed between the fastening member 203 and the supporting member 205 in the circumferential direction Lt; / RTI >

6, according to another embodiment of the present invention, a driving unit 603 for rotating the supporting member 601 in a circumferential direction is provided. The driving unit 603 may be provided as an electric motor Wherein the support member 601 is rotatably coupled to the outer circumferential surface of the rack housing 201.

The supporting member 601 can be arbitrarily changed in the fixing position of the supporting member 601 and the elastic member 207 The amount of clearance between the rack bush 301 and the rack bar 209 is arbitrarily adjusted so that the operating load of the rack bar 209 can be adjusted.

A first tooth 605 is formed on the outer circumferential surface of the support member 601 and a second tooth 609 is formed on the outer circumferential surface of the rotary shaft 607 of the drive portion 603 to mate with the first tooth 605, The rotational driving force of the driving unit 603 is transmitted to the supporting member 601. [

According to the embodiment of the present invention as described above, the operating load of the rack bar can be adjusted by adjusting the tightening force of the rack bar, as shown in FIG. 9. As shown in FIG. 10, Thereby reducing the rattle noise that has occurred in the < RTI ID = 0.0 >

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as falling within the scope of the present invention.

201: rack housing 203: fastening member
205: support member 207: elastic member
209: Rack bar 301: Rack bush
303: coupling hole 305: pressing member
307: Guide groove 309:
401: elastic ring 403: fixing member
601: Support member 603:
605: first tooth 607:
609: Secondary

Claims (7)

A pressing member which is supported by the inside of the end portion of the rack housing and is fitted in a coupling hole penetrating the outer and inner circumferential surfaces of the rack housing so as to press and support the coupled rack bushing inward in the radial direction;
A tightening member coupled to an outer circumferential surface of the rack housing and rotating in the circumferential direction to push the pressing member inward in the radial direction;
A support member spaced apart from the tightening member and coupled to an outer circumferential surface of the rack housing; And
And an elastic member provided between the supporting member and the tightening member and providing a circumferential rotational force to the tightening member,
Wherein a guide groove is formed in an inner peripheral surface of the tightening member in the circumferential direction so that the pressing member is pressed inward in the radial direction when the tire is rotated in the circumferential direction. delete The method according to claim 1,
The guide groove
Wherein the radial depth gradually increases from one circumferential side to the other side. The method according to claim 1,
Among the both axial side surfaces of the guide groove,
And the side opposite to the direction toward the support member is opened. The method according to claim 1,
Wherein a fixing member is coupled to an outer circumferential surface of the rack housing so as to support both sides or one side in the axial direction of the support member. The method according to claim 1,
And a driving unit for rotating the support member in a circumferential direction. The method according to claim 6,
A first value is formed on an outer circumferential surface of the support member,
And a second tooth engaging with the first tooth is formed on the outer circumferential surface of the rotating shaft of the driving unit.
KR1020140069170A 2014-06-09 2014-06-09 Steering apparatus for vehicle KR101569761B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140069170A KR101569761B1 (en) 2014-06-09 2014-06-09 Steering apparatus for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140069170A KR101569761B1 (en) 2014-06-09 2014-06-09 Steering apparatus for vehicle

Publications (1)

Publication Number Publication Date
KR101569761B1 true KR101569761B1 (en) 2015-11-20

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ID=54844346

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140069170A KR101569761B1 (en) 2014-06-09 2014-06-09 Steering apparatus for vehicle

Country Status (1)

Country Link
KR (1) KR101569761B1 (en)

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