KR20150026453A - Clearance compensator of steering gear for car - Google Patents

Clearance compensator of steering gear for car Download PDF

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Publication number
KR20150026453A
KR20150026453A KR20130105323A KR20130105323A KR20150026453A KR 20150026453 A KR20150026453 A KR 20150026453A KR 20130105323 A KR20130105323 A KR 20130105323A KR 20130105323 A KR20130105323 A KR 20130105323A KR 20150026453 A KR20150026453 A KR 20150026453A
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KR
South Korea
Prior art keywords
elastic member
rack
clearance
rack bar
driving
Prior art date
Application number
KR20130105323A
Other languages
Korean (ko)
Inventor
손창욱
이진웅
Original Assignee
한국델파이주식회사
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 한국델파이주식회사 filed Critical 한국델파이주식회사
Priority to KR20130105323A priority Critical patent/KR20150026453A/en
Publication of KR20150026453A publication Critical patent/KR20150026453A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
    • B62D5/22—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/12—Arrangements for adjusting play
    • F16C29/123—Arrangements for adjusting play using elastic means
    • 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
    • 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
    • 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

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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 apparatus for compensating play of a steering gear for an automobile according to an embodiment of the present invention includes a rack bearing arranged at one side of a rack bar in a housing to support the rack bar, An elastic member provided on the rear side of the elastic member and supporting the elastic member by pressing the elastic member toward the rack bar through rotation; And a coordinator plug disposed behind the driving unit and supporting the driving unit. According to the present invention, the clearance between the rack bar and the rack bearing is compensated by compensating the clearance between the rack bearing and the adjuster plug by determining the clearance between the rack bearing and the adjuster plug by driving the servomotor, It is possible to improve the generation of the fricative sound generated between the parts.

Description

Technical Field [0001] The present invention relates to a clearance compensator for a steering gear for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a position compensating apparatus for a steering gear for an automobile.

Generally, the vehicle is provided with a steering system that converts the operation force of the driver into the steering force of the vehicle in order to steer the vehicle.

The steering system includes a steering wheel installed inside the vehicle and operated by the driver, a steering column connected to the steering wheel, and a steering column, which converts the rotational force of the steering column into steering force of the vehicle And includes a steering gear.

The double-purpose steering gear converts the operating force of the driver into a turning force. Recently, a steering gear that can steer even with a small force has been disclosed.

In detail, the steering gear includes a pinion rotating by a rotational force transmitted from a steering column, a rack bar moving in the longitudinal direction in engagement with the pinion, a rack bar housing guiding the movement of the rack bar and a rack bar housing, And a ratchet compensating device for supporting the rack bar so as to be able to engage with the rack bar.

Meanwhile, the above-described known artificial balance compensating device for a steering gear includes a rack bearing inserted into the housing to support the rack bar, a coil spring for supporting the rack bearing by elastic force, a support plate for supporting the coil spring, A torsion spring for providing a rotational force of the cam member, and an adjuster plug coupled to an inlet side of the housing to support the cam member.

However, the conventional artificial balance compensating device for a steering gear has a problem in that the shape of the conventional artificial balance compensating device is complicated due to a large number of parts, and that the actuating part is disengaged due to friction and contact between the parts during long- .

In addition, due to a large number of parts, there is a problem in that the work time increases during assembly and replacement, resulting in an increase in manufacturing cost of the product.

Patent Registration No. 10-1146936

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to simplify the configuration of parts to reduce defective products, And to compensate for a clearance of an accurate value by driving the servo motor by determining a clearance between the left and right wheels of the vehicle.

According to an aspect of the present invention, there is provided an apparatus for compensating play of an automotive steering gear, comprising: a rack bearing disposed at one side of a rack bar in a housing to support the rack bar; A play compensating portion disposed behind the elastic member and pressing the elastic member toward the rack bar through rotation to support the elastic member; A driving unit coupled to the clearance compensating unit and transmitting rotational force to the clearance compensating unit, and an adjuster plug disposed behind the driving unit and supporting the driving unit.

Wherein the clearance compensator comprises: a first cam supported on the one surface of the elastic member and having a plurality of first inclined surfaces formed at equal intervals in the circumferential direction on the other surface; and a second cam disposed on one surface of the first cam, And a second cam that is coupled to the driving unit on the other side.

The driving unit may be a servo motor that receives driving information of the vehicle and performs predetermined control according to the driving information.

The driving information may be a total driving distance of the automobile.

The preset control may be rotated at an angle of 60 [deg.] Per mile travel distance of 10,000 kilometers.

A male screw is formed on an outer circumferential surface of the clearance compensating portion and a female screw corresponding to the male screw is formed on the inner side of the housing into which the clearance compensating portion is inserted.

According to the present invention, the clearance between the rack bar and the rack bearing is compensated by compensating the clearance between the rack bearing and the adjuster plug by determining the clearance between the rack bearing and the adjuster plug by driving the servomotor, It is possible to improve the generation of the fricative sound generated between the parts.

FIG. 1 is a schematic view showing a steering gear for a vehicle to which an apparatus for compensating a pitch of an automotive steering gear according to an embodiment of the present invention is applied.
2 is a schematic cross-sectional view taken along the line II-II in Fig.
3 is an exploded perspective view of a clearance compensating apparatus for an automotive steering gear according to an embodiment of the present invention.
4 is a schematic view showing a clearance compensator of a steering gear for a vehicle according to an embodiment of the present invention.
5 is a schematic cross-sectional view illustrating a clearance adjustment process of a clearance compensating apparatus for an automotive steering gear 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.

FIG. 1 is a schematic view showing a steering gear for a vehicle to which a clearance compensating device for an automotive steering gear according to an embodiment of the present invention is applied, FIG. 2 is a schematic sectional view cut along a line II-II in FIG. 1, 3 is an exploded perspective view of a clearance compensating apparatus for an automotive steering gear according to an embodiment of the present invention. 4 is a schematic view showing a clearance compensating unit of an automotive steering gear according to an embodiment of the present invention, and FIG. 5 is a view illustrating a clearance adjusting process of a clearance compensating apparatus for a vehicle steering gear according to an embodiment of the present invention. Fig.

Referring to FIGS. 1 to 3, a pitch compensating apparatus for an automotive steering gear according to an embodiment of the present invention (hereinafter referred to as a pitch compensating apparatus for an automotive steering gear) is applied to a steering gear 200.

The steering gear 200 may include a rack bar housing 230 receiving the pinion 210, the rack bar 220 and the rack bar 220. The pinion 210 is connected to a steering wheel (not shown) and can be rotated by receiving the rotational force of the steering wheel through the operation of the driver. The rack bar 220 may have a rod shape and may have a gear portion 221 that can engage with the pinion 210 on one outer circumferential surface of the rack bar 220 in the longitudinal direction. That is, the rack bar 220 is engaged with the pinion 210 through the gear portion 221 and is movable in the axial direction when the rotational force of the steering wheel is transmitted. In the meantime, a tubular rack bar housing 230 penetrating through the rack bar 220 can be installed to surround the rack bar 220. That is, the pinion 210 and the rack bar 220 are engaged inside the rack bar housing 230, and the rack bar 220 can be moved in the axial direction within the rack bar housing 230.

On the other hand, a clearance compensating device for the present steering gear is mounted on the outside of the rack bar housing 230 where the pinion 210 and the rack bar 220 are engaged.

Referring to FIGS. 2 and 3, the apparatus for compensating the clearance of the steering gear of the present invention includes a rack bearing 10.

First, before describing the rack bearing 10, the housing 40 will be described first.

1 to 3, the housing 40 is formed to extend to the outside of the rack bar housing 230 and includes an inner side portion of the rack bar housing 230 to which the pinion 210 and the rack bar 220 are engaged, And may be integrally formed with the rack bar housing 230 or separately formed from the rack bar housing 230 and fastened to the rack bar housing 230 through fastening means.

That is, the automotive steering gear gap compensating device includes a rack bearing 10 disposed at one side of the rack bar 220 in the housing 40 to support the rack bar 220.

2 and 3, the rack bearing 10 is slidably inserted in the axial direction of the housing 40, and the gear bar 221 and the pinion 210 of the rack bar 220 are closely contacted with each other. (Not shown). A rack bar support groove 11 corresponding to the outer circumferential surface of the rack bar 220 is formed at one side of the rack bearing 10 and the rack bearing 10 has a rack bar support groove 11 And supports the rack bar 220 by applying pressure to the rack bar 220 in a direction perpendicular to the axial direction of the rack bar 220.

At this time, the rack bar support groove 11 may be further provided with a bushing 111 for reducing frictional force between the rack bearing 10 and the rack bar 220 when the rack bar 220 is supported . Illustratively, the bushing 111 may be formed of a material having a low coefficient of friction.

On the other hand, the other side of the rack bearing 10 may be formed as a depressed groove corresponding to the outer shape of the flat plate or the elastic member 60 so as to be supported by the elastic member 60 to be described later.

Next, referring to Figs. 2 and 3, the pitch compensating device of the steering gear for automobile includes an adjuster plug 20. Fig.

The adjuster plug (20) is disposed on one side of the rack bearing (10). More specifically, the adjuster plug 20 is disposed rearwardly of the driving portion 70 in the axial direction of the housing 40 and includes a rack bearing 10, an elastic member 60, a clearance compensating portion 30, So that foreign matter can be prevented from penetrating into the inside of the housing 40 by being fastened to the inlet side of the housing 40. [ In addition, the adjuster plug 20 may have a groove formed therein for receiving the driving portion 70 therein.

Illustratively, the adjuster plug 20 is a disc-shaped stopper, formed in a size corresponding to the inner surface of the housing 40, and can be press-fitted into the housing 40 through interference fit A screw thread 50 is formed on the outer circumferential surface, and a screw thread 50 corresponding to the inner circumferential surface of the inlet side of the housing 40 is formed. However, the structure in which the adjuster plug 20 is coupled with the housing 40 can be changed into various forms as needed.

Next, the pitch compensating device of the present steering gear for an automobile includes an elastic member 60, a clearance compensating part 30, and a driving part 70. [

First, the clearance compensation unit 30 will be described.

2 to 4, the play compensating unit 30 is disposed inside the housing 40 and is disposed at the rear of the elastic member 60 to be described later, (220) so as to support the elastic member (60).

More specifically, the clearance compensating section 30 is disposed within the housing 40 and has a first surface 311 on which an elastic member 60 is supported on one surface and a plurality of first inclined surfaces 311 on the other surface in the circumferential direction, A second inclined surface 331 corresponding to the first inclined surface 311 is formed on one side of the cam 31 and a second inclined surface 331 corresponding to the other side of the first cam 31, And may include a cam 33.

That is, the clearance compensating unit 30 moves the first cam 31 engaged with the second cam 33 to the rack bearing 30 side through the rotation of the second cam 33 coupled to the driving unit 70, The gap between the rack bearing 10 and the first cam 31 can be compensated by pressing the elastic member 60 provided between the bearing 10 and the first cam 31.

The clearance compensating section 30 is formed with a male screw on the outer circumferential surface and a female screw corresponding to the male screw on the inner side of the housing 40. The clearance compensating section 30 receives the rotational force from the driving section 70, 10).

That is, the clearance compensating unit 30 may be formed in various shapes that can be combined with the driving unit 70 to compensate the clearance between the rack bearing 10 and the first cam 31 through the rotational force of the driving unit 70 have.

At this time, the pitch compensating device of the present steering gear for an automobile may further include an elastic member 60 and an elastic member support plate 80.

Referring to FIGS. 2 and 3, the elastic member support plate 80 is movably disposed between the first cam 31 and the rack bearing 10 while being supported by the first cam 31. 2, the right side surface of the elastic member support plate 80 is supported by the first cam 31. [

The elastic member (60) provides a pushing force of the rack bearing (10) against the elastic member support plate (80) along the central axis (CL). That is, the rack bearing 10 is pushed toward the rack bar 220 by the force of the elastic member 60 supported by the elastic member support plate 80. For example, the elastic member 60 may be embodied as a coil spring, and the elastic member 60 may be inserted into the recessed space formed inside the rack bearing 10. [

At this time, a gap d1 is formed between the elastic member support plate 80 and the rack bearing 10. Accordingly, the elastic member support plate 80 does not directly hit the rack bearing 10 unless a very large impact is transmitted through the rack bar 220, so that noise, shock, and the like can be prevented.

Meanwhile, the pitch compensating device of the steering gear of the present invention may further include a movement restricting member 90 formed to restrict the movement of the elastic member supporting plate 80 in the direction opposite to the rack bearing 10 . For example, as shown in Figs. 2 and 3, the movement restricting member 90 can be fastened to the rack bearing 10 and can be realized in the form of a bolt having a head. At this time, the thread of the movement restricting member 90 is fastened to the rack bearing 10, and the head of the movement restricting member 90 is beyond the elastic member support plate 80. Specifically, a through hole is formed in the center of the elastic member support plate 80, and the thread of the movement limiting member 90 passes through the through hole and is fastened to the rack bearing 10. The position of the head of the movement limiting member 90 relative to the rack bearing 10 is fixed so that even if the elastic member support plate 80 is pushed by the elastic member 60, It can not be pushed further beyond the position where it comes into contact with the head of the head 90.

With this structure, one surface of the elastic member support plate 80 is supported by the first cam 31 and the other surface is supported by the elastic member 60. At this time, the initial mounting state (i.e., the rack bar In a state in which the elastic member support plate 80 is not in contact with either the rack bearing 10 or the movement restricting member 90 in a state where the elastic member support plate 80 is in the initial state before the wear of the pinion 210 . 2, there is a gap d1 between the elastic member support plate 80 and the rack bearing 10 and also between the elastic member support plate 80 and the head of the movement restricting member 90 So that the interval d2 exists. This arrangement can be set by adjusting the elastic force of the elastic member 60, the position of the adjuster plug 20, and the like.

At this time, before the elastic member support plate 80 is installed in a state of being supported by the first cam 31, the distance between the elastic member support plate 80 and the rack bearing 10 is not d1 in FIG. 2 is a value corresponding to the sum of d1 and d2. That is, in this case, the elastic member support plate 80 is moved away from the rack bearing 10 as much as possible by the elastic member 60, that is, in a state where the elastic member support plate 80 is in contact with the head of the movement limiting member 90 State.

In other words, the elastic member support plate 80 is spaced from the rack bearing 10 by the sum of d1 and d2 from the rack bearing 10 before being installed in a state of being supported by the first cam 31, And is located at a position spaced apart from the rack bearing 10 by d1 while being pushed by the first cam 31 at a predetermined distance. At this time, the elastic member support plate 80 is separated from the head of the movement restricting member 90 by d2.

On the other hand, a drive unit 70 is disposed between the clearance compensating unit 30 and the adjuster plug 20.

2 and 3, the driving unit 70 is disposed behind the clearance compensating unit 30 and is coupled to the clearance compensating unit 30 and transmits rotational force to the clearance compensating unit 30. As shown in FIG.

At this time, the driving unit 70 may be a servo motor that receives driving information of the automobile and performs predetermined control according to the driving information.

That is, the driving unit 70 is applied to the servomotor and controls the position of the rack bearing 10 by applying a rotational force to the clearance compensating unit 30 according to the driving information to thereby drive the first cam 31 ) And the rack bearing (10). Here, the driving information means the total driving distance of the automobile.

For example, the driving unit 70 may be set to rotate at an angle of 60 ° per 10,000 km of the total driving distance of the automobile, thereby rotating the clearance compensating unit 30 to support the rack bearing 10, It is possible to adjust the clearance between the surface of the first cam 31 on which the support shaft 60 is supported and the rack bearing 10.

Hereinafter, a clearance adjusting process of the clearance compensating device of the present steering gear for automobile will be described.

For the sake of explanation, the same reference numerals as those used for describing the pitch compensating device of the present invention will be used for explaining the pitch adjusting process of the pitch compensating device for the automotive steering gear, A duplicate description will be omitted.

5, when a clearance is generated between the rack bar 22 and the rack bearing 10 due to an increase in travel distance in a state where no clearance is generated between the rack bearing 10 and the adjuster plug 20 The driving unit 70 receives the total driving distance information of the vehicle from a control unit (not shown) and performs rotation control according to the total driving distance. As the driving unit 70 is driven as described above, the clearance compensating unit 30 coupled to the front end of the driving unit 70 rotates and moves toward the rack bearing 10 to move the elastic member 30, which is disposed in front of the clearance compensating unit 30, (60). The elastic member 60 having received the pressure from the clearance compensating unit 30 applies pressure to the rack bearing 10 positioned at the front side through the elastic force to move the rack bearing 10 toward the rack bar 220, ) And the adjuster plug (20).

As described above, according to the present invention, since the clearance between the rack bearing 10 and the adjuster plug 20 is determined based on the driving information of the automobile, the clearance is compensated by driving the driving unit 70, And the rack bearing 10, thereby improving the performance of the product, thereby improving the generation of the rubbing sound generated between the parts.

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. Rack bearing
11. Rack bar support groove 111. Bushing
20. Adjuster plug
30. Cavity compensator
31. First cam 311. First inclined surface
33. Second cam 331. Second inclined surface
40. Housing
50. Threaded
60. Elastic member 70. Drive
80. Elastic member support plate 90. Movement restricting member
200. Steering gear
210. Pinion
220. Rack bar
221. Gear part
230. Rack bar housing

Claims (6)

A rack bearing arranged at one side of the rack bar in the housing to support the rack bar,
An elastic member disposed behind the rack bearing and elastically supporting the rack bearing,
A play compensator disposed behind the elastic member and supporting the elastic member by pressing the elastic member toward the rack bar through rotation,
A driving unit disposed at the rear of the clearance compensating unit, coupled to the clearance compensating unit and transmitting rotational force to the clearance compensating unit,
And an adjuster plug which is disposed behind the driving portion and supports the driving portion. The method of claim 1,
The clearance compensation unit
A first cam supported on the one surface with the elastic member and formed with a plurality of first inclined surfaces at equal intervals in the circumferential direction on the other surface,
And a second cam that is coupled to the other surface of the first cam and has a second inclined surface corresponding to the first inclined surface, and the other surface is coupled to the driving unit. The method of claim 1,
Wherein the driving unit is a servo motor that receives driving information of the vehicle and performs predetermined control according to the driving information. 4. The method of claim 3,
Wherein the driving information is a total driving distance of the automobile. 4. The method of claim 3,
Wherein the driving unit is rotated at an angle of 60 degrees per 10,000 km. The method of claim 1,
A male screw is formed on an outer peripheral surface of the clearance compensating portion,
And a female screw corresponding to the male screw is formed on an inner side of the housing into which the clearance compensating unit is inserted, and is fastened to each other.
KR20130105323A 2013-09-03 2013-09-03 Clearance compensator of steering gear for car KR20150026453A (en)

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KR20130105323A KR20150026453A (en) 2013-09-03 2013-09-03 Clearance compensator of steering gear for car

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Application Number Priority Date Filing Date Title
KR20130105323A KR20150026453A (en) 2013-09-03 2013-09-03 Clearance compensator of steering gear for car

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KR20150026453A true KR20150026453A (en) 2015-03-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111561644A (en) * 2020-06-19 2020-08-21 大连华齐泰精密仪器有限公司 Fine adjustment detection rotating mechanism of crane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111561644A (en) * 2020-06-19 2020-08-21 大连华齐泰精密仪器有限公司 Fine adjustment detection rotating mechanism of crane

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