KR20170083262A - Gear box of steering system for vehicle - Google Patents

Gear box of steering system for vehicle Download PDF

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Publication number
KR20170083262A
KR20170083262A KR1020160002496A KR20160002496A KR20170083262A KR 20170083262 A KR20170083262 A KR 20170083262A KR 1020160002496 A KR1020160002496 A KR 1020160002496A KR 20160002496 A KR20160002496 A KR 20160002496A KR 20170083262 A KR20170083262 A KR 20170083262A
Authority
KR
South Korea
Prior art keywords
sector
gear
magnetic body
rack gear
rack
Prior art date
Application number
KR1020160002496A
Other languages
Korean (ko)
Inventor
지덕만
Original Assignee
주식회사 만도
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 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020160002496A priority Critical patent/KR20170083262A/en
Publication of KR20170083262A publication Critical patent/KR20170083262A/en

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Classifications

    • 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
    • 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
    • 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

According to an embodiment of the present invention, A sector shaft rotatably installed in the housing and having a rack gear formed at one side thereof, a sector shaft disposed to intersect with the rack piston, and a sector gear formed at one side of the rack gear so as to be inclined with respect to the rack gear; And a gap adjusting member which is provided in the space and presses the sector shaft in the axial direction to adjust the gap between the rack gear and the sector gear.

Description

Technical Field [0001] The present invention relates to a gear box of a steering system for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear box of a steering apparatus for a vehicle, and more particularly, to a gear box of a steering apparatus for a vehicle which can automatically adjust a meshing state between a sector gear formed on a sector shaft and a rack gear formed on the rack piston .

BACKGROUND ART [0002] Generally, a steering apparatus for a vehicle is for changing the traveling direction of a vehicle, and includes a steering wheel provided in a driver's seat, a steering shaft provided at a lower side thereof, Gear box, and the like.

FIG. 1 is a cross-sectional view showing a gear box of a steering apparatus according to the related art. In the housing 10, an input shaft 20 is provided at one side of the input shaft 20 to receive a steering force generated by a driver, And a rack piston 40 is disposed on the outside of the ball screw 30 so as to be slid in the axial direction with a ball therebetween. A rack gear 41 is formed on the outer surface of one side of the rack piston 40 so that the rack gear 41 can be transmitted to the rack piston 40 side.

The rack gear 41 is engaged with the sector gear 51 of the sector shaft 50 installed inside the housing 10 so as to intersect with the rack piston 40 to rotate the sector shaft 50. The sector gear 50 51 and the rack gear 41 are installed inclined at a predetermined angle.

An adjustment screw 70 is provided at the tip of the sector shaft 50 so as to adjust the engagement between the rack gear 41 and the sector gear 51. The adjustment screw 70 has a head side connected to the sector shaft 50 As shown in Fig.

The housing 10 is provided with an adjusting hole 1b through which the adjusting screw 50 passes and is fixed to the outside of the adjusting hole 1b with the adjusting screw 5 and also to the housing 10 An adjustable nut 60 is provided so as to be fixed.

Therefore, in the conventional gear box, when the rack gear 41 and the sector gear 51 are worn out due to long-term use and a clearance is generated therebetween, the adjusting screw 50 is rotated to rotate the sector shaft 50 The gap between the sector gear 51 and the rack gear 41 is adjusted.

However, since the gear box of the conventional steering system for a vehicle having the above-described configuration requires manual operation to adjust the clearance through the adjusting screw, it takes a long time to adjust the condition, There was a difficult problem.

In addition, since clearance is generated between the rack gear and the sector gear until the gap adjustment occurs before the gap adjustment, the power transmission becomes unstable, the steering feeling is lowered, noise and vibration occur, .

Korean Patent Publication No. 10-2006-0101621

The present invention has a gap adjusting member at one side of a sector shaft so as to automatically adjust a meshing state between a sector gear formed on a sector shaft and a rack gear formed on the rack piston, thereby achieving stable power transmission, And a gear box of a steering apparatus for a vehicle.

The objects of the present invention are not limited to those described above, and other objects and advantages of the present invention which are not mentioned can be understood by the following description.

A gear box of a steering system for a vehicle according to an embodiment of the present invention includes: a housing having a space formed therein; A sector shaft rotatably installed in the housing and having a rack gear formed at one side thereof, a sector shaft disposed to intersect with the rack piston, and a sector gear formed at one side of the rack gear so as to be inclined with respect to the rack gear; And a gap adjusting member provided in the space and adjusting the gap between the rack gear and the sector gear by pressing the sector shaft in the axial direction.

In one embodiment, the gap adjusting member may be an elastic member interposed between the rack gear and the sector gear.

In one embodiment, one end of each of the side walls of the space and the sector axis adjacent to the space may have a seating groove on which an elastic body is seated.

In one embodiment, the gap adjusting member may be a magnetic body interposed between the rack gear and the sector gear.

In one embodiment, the magnetic body may include a first magnetic body provided on one wall of the space, and a second magnetic body provided on one end of the sector axis adjacent to the first magnetic body and having a polarity opposite to that of the first magnetic body.

According to the embodiment of the present invention, smooth power transmission between the rack gear and the sector gear is continuously performed due to the gap adjusting member, thereby obtaining a stable neutral feeling and steering feeling, Can be prevented.

Further, according to the embodiment of the present invention, it is not necessary to manually perform the adjustment of the gap, the time required for the adjustment time can be saved, the coupling state and performance between the products can be made uniform, Can be improved.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a sectional view showing a gear box of a general steering system for a vehicle.
2 is a cross-sectional view showing a part of a gear box of a steering system for a vehicle according to an embodiment of the present invention.
3 is a cross-sectional view showing a part of a gear box of a steering system for a vehicle according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

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

2 and 3 are sectional views showing a gear box of a steering apparatus for a vehicle provided with a gap adjusting member according to the present invention, respectively.

Referring to FIGS. 2 and 3, the gear box has an outer shape, and includes a housing 100 in which an installation space for various components, a cylinder, and a flow path are formed. A space 110 may be formed in the housing 100 to be spaced apart from one end of the sector shaft 500.

An input shaft 200 is installed on one side of the housing 100 to receive a steering force generated by a driver and a ball screw 300 is installed at the tip of the input shaft to interlock with the input shaft 200.

A rack piston 400 is provided outside the ball screw 300 so as to be slidable in an axial direction with a ball therebetween. A rack gear 410 is formed on one outer surface of the rack piston 400.

A sector shaft 500 is provided at the other inner side of the housing 100 and is provided with a rack shaft 400 and a sector gear 500 formed at a middle end thereof with a sector gear 510 to be engaged with the rack gear 410, And is rotated due to the rotational force transmitted from the motor 410. The rack gear 410 and the sector gear 510 may be coupled at a predetermined angle in an inclined state.

For example, the sector gear 510 is formed at a predetermined angle inclination relative to the axis of the sector shaft 500, and the rack gear 410 is formed in a non-tilted state. Thus, And the degree of close contact between the rack gear 410 and the sector gear 510 when the sector shaft 500 is moved in the axial direction is provided in a state of being radially rotated by the rack gear 410 engaged with the gear 510, .

In order to achieve stable power transmission, steering feeling, and uniform performance between components, the present invention automatically adjusts the meshing state between the sector gear 510 and the rack gear 410, A gap adjusting member is provided.

That is, when the rack gear 410 and the sector gear 510 are worn together, the gap regulating member moves the sector shaft 500 in the axial direction so that the gap between the rack gear 410 and the sector gear 510 The sector gear 500 can be pressed in the axial direction to bring the rack gear 410 and the sector gear 510 in close contact with each other.

The gap regulating member may be an elastic body 600 provided in the space portion 110 of the housing 100 so as to contact one end of the sector shaft 500 as shown in FIG. As the elastic body 600, for example, a coil spring may be used. Mounting grooves 111 and 520 may be formed on one side wall of the space portion 110 and one end of the sector shaft 500 adjacent to the one side wall of the space portion 110 so that both ends of the elastic body 600 can be inserted and seated.

As a result, when the rack gear 410 and the sector gear 510 are worn out due to the long-term use of the gear box and the clearance is generated therebetween, the elastic body 600 presses the sector shaft 500 in the axial direction by a generated clearance So that the meshing state of the sector gear 510 and the rack gear 410, which are inclined with respect to each other, can be automatically compensated and adjusted.

3, a magnetic body 700 may be used as the gap adjusting member. That is, the magnetic body may include a first magnetic body 710 fixed to the space portion of the housing and a second magnetic body 720 provided at one end of the sector axis 500. The first magnetic body 710, The two magnetic bodies 720 have polarities different from each other and can impart repulsive force to each other. The first magnetic body 710 and the second magnetic body 720 may be, for example, permanent magnets or electromagnets. At this time, as in the case where the elastic body of FIG. 2 is stably installed, a seating groove may be formed at one end of one side wall of the space portion and a sector axis adjacent to the space portion so that the magnetic body can be more stably fixed.

When the magnetic member is applied as the gap regulating member as described above, when the rack gear 410 and the sector gear 510 are worn out due to long-term use of the gear box and clearance is generated therebetween, the first magnetic body 710 and the second magnetic body The first magnetic body 710 generates a repulsive force and the first magnetic body 710 presses the sector axis 500 by the generated gap with respect to the second magnetic body 720 fixed to the housing 100. As a result, The engagement state of the gear 510 and the rack gear 410 can be automatically compensated and adjusted.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

That is, it should be understood that the embodiments described above are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

Accordingly, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100; A housing 110; Space portion
111; A seating groove 200; Input shaft
300; Ball screw 400; Rack Piston
410; A rack gear 500; Sector axis
510; Sector gear 520; Seat groove
600; Elastic body 700; Magnetic body
710; A first magnetic body 720; The second magnetic body

Claims (5)

A housing having a space formed therein;
A rack piston rotatably installed in the housing and having a rack gear formed on one side thereof,
A sector shaft disposed to intersect with the rack piston and having a sector gear formed at an outer side thereof so as to be inclined with respect to the rack gear;
A gap adjusting member which is provided in the space and presses the sector shaft in the axial direction to adjust the gap between the rack gear and the sector gear;
And a gearbox for steering the vehicle.
The method according to claim 1,
And the gap regulating member is an elastic body interposed between the rack gear and the sector gear.
3. The method of claim 2,
Wherein one end of each of the side walls of the space and the sector axis adjacent thereto is formed with a seating groove on which an elastic body is seated.
The method according to claim 1,
Wherein the gap regulating member is a magnetic body interposed between the rack gear and the sector gear.
5. The method of claim 4,
Wherein the magnetic body includes a first magnetic body provided on one side wall of the space and a second magnetic body provided on one end of a sector axis adjacent to the first magnetic body and having a polarity opposite to that of the first magnetic body.
KR1020160002496A 2016-01-08 2016-01-08 Gear box of steering system for vehicle KR20170083262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160002496A KR20170083262A (en) 2016-01-08 2016-01-08 Gear box of steering system for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160002496A KR20170083262A (en) 2016-01-08 2016-01-08 Gear box of steering system for vehicle

Publications (1)

Publication Number Publication Date
KR20170083262A true KR20170083262A (en) 2017-07-18

Family

ID=59430701

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160002496A KR20170083262A (en) 2016-01-08 2016-01-08 Gear box of steering system for vehicle

Country Status (1)

Country Link
KR (1) KR20170083262A (en)

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E601 Decision to refuse application