KR20130016901A - Rack and pinion type steering apparatus for vehicle - Google Patents

Rack and pinion type steering apparatus for vehicle Download PDF

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Publication number
KR20130016901A
KR20130016901A KR1020110079096A KR20110079096A KR20130016901A KR 20130016901 A KR20130016901 A KR 20130016901A KR 1020110079096 A KR1020110079096 A KR 1020110079096A KR 20110079096 A KR20110079096 A KR 20110079096A KR 20130016901 A KR20130016901 A KR 20130016901A
Authority
KR
South Korea
Prior art keywords
rack
diameter portion
vehicle
bellows
pinion type
Prior art date
Application number
KR1020110079096A
Other languages
Korean (ko)
Inventor
정재진
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 KR1020110079096A priority Critical patent/KR20130016901A/en
Publication of KR20130016901A publication Critical patent/KR20130016901A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/16—Arrangement of linkage connections
    • B62D7/163—Arrangement of linkage connections substantially in axial direction, e.g. between rack bar and tie-rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/07—Facilitating assembling or mounting

Abstract

The present invention relates to a rack pinion type steering apparatus of an automobile, and according to the present invention, a rack housing is used when the bellows is relaxed by shrinking the bellows by reciprocating the rack bar after assembling the bellows to the rack housing and the tie rod by using the bellows of a simple structure and shape. It prevents the separation from the outside and increases the airtightness to prevent the inflow of foreign substances such as dust or moisture from the outside, and it is effective to improve the operability and durability.

Description

Rack and Pinion Type Steering Apparatus for Vehicle

An embodiment of the present invention relates to a rack pinion type steering apparatus of an automobile. More specifically, the bellows of a simple structure and shape is used to assemble the bellows to the rack housing and tie rod, and then to reciprocate the rack bar to prevent the escape from the rack housing when the bellows contract and relax and to increase the airtightness. It is possible to prevent the inflow of foreign substances such as moisture, and relates to a rack pinion type steering apparatus of a vehicle to improve the operability and durability.

In general, the steering device of a vehicle is a device for changing the driving direction of the vehicle at the driver's will, and is a device that assists the driver in advancing the vehicle in a desired direction by arbitrarily changing the rotation center of the front wheel of the vehicle.

The steering device of such a vehicle includes a steering column disposed at the driver's seat, a steering shaft connected thereto, and a steering column mounted on the outside thereof to fix the gearbox and the steering shaft connected through the steering shaft and the universal joint to the vehicle body. Etc. are provided.

1 is a partial perspective view of a rack pinion type steering apparatus of a conventional vehicle, and FIG. 2 is a cross-sectional view showing a part of a rack pinion type steering apparatus of a conventional vehicle.

1 and 2, the rack pinion type steering apparatus 100 of the related art vehicle has a rack-pinion mechanism unit 130 for converting rotational force input from the steering shaft 105 into linear motion, and a rack is formed. And tie bars 110 and tie rods 110 formed at one end of the rack bar 230 having inner ball joints 210 at both ends and the ball portion 220 of the inner ball joint 210 integrally formed. The rod end 120, an outer ball joint 125 coupled to the end of the tie rod end 120, and a bellows 140 surrounding the inner ball joint 210 are configured.

In addition, the rack pinion steering system of the vehicle is provided with an inner ball joint 210 at the left and right ends of the rack bar 230, the rack is formed, the inner ball joint 210 is connected to the tie rod 110, the tie rod ( 110 is connected to the tie rod end 120 and the outer ball joint 125 and the knuckle of the tire.

The inner ball joint 210 surrounds the tie rod 110 having the spherical ball portion 220 and the ball portion 220 of the tie rod, and connects the tie rod 110 and the rack bar 230 to each other. 240, a ball seat 250 of a plastic material inserted between the ball portion 220 of the tie rod and the ball housing 240 may be assembled and connected to each other.

When the driver rotates the steering wheel, the rotational force is transmitted to the steering shaft 105 and the universal joint (not shown). The rack pinion type steering apparatus of the automobile having such a structure includes a pinion that engages with the rack formed in the rack bar 230 to transmit power. (Not shown), and the transmitted rotational force is changed by a rack and a pinion in a linear direction to linearly move the rack bar 230.

One side of the bellows 140 is fixed to the rack housing 150 by the fixing means 260, the other side is fixed by the tie rod 110 is pressed.

The rack pinion type steering apparatus of the related art as described above has a problem in that the bellows is separated by linear movement of the rack bar after the bellows is coupled to the tie rod and the rack housing.

In addition, when assembling the bellows, the adhesive was applied to the surface of the rack housing in order to prevent the separation of the rack housing and the bellows, there was also a problem that the foreign matter is easily contaminated due to the foreign matter.

In addition, it is difficult to maintain the airtightness between the rack housing and the bellows, and foreign substances such as dust or moisture are introduced from the outside, so that the rack housing, the rack bar, the ball joint, etc. are easily contaminated, and corrosion has occurred.

Therefore, the present invention has been made in view of the above-described background, using a bellows of simple structure and shape, after assembling the bellows on the rack housing and tie rod prevents the escape from the rack housing when the bellows shrinks and relaxes by reciprocating the rack bar It is possible to prevent the inflow of foreign substances such as dust or moisture from the outside by increasing the purpose, to improve the operability and durability.

One embodiment of the present invention to achieve this object, the rack housing is accommodated in the rack bar; A tie rod coupled with the rack bar; A large diameter portion coupled to the rack housing, a small diameter portion coupled to the tie rod, and a contraction portion connecting the large diameter portion and the small diameter portion, and an inner circumferential surface of the small diameter portion includes a bellows having a protrusion formed therein. Provides a rack pinion type steering system.

According to the present invention, by using the bellows of simple structure and shape, the bellows is assembled to the rack housing and the tie rod, and the reciprocating motion of the rack bar prevents the escape from the rack housing when the bellows shrinks and relaxes, and improves airtightness to prevent dust from outside. It is possible to prevent the inflow of foreign substances such as moisture, and the effect of improving the operability and durability.

1 is a partial perspective view of a rack pinion type steering apparatus of a conventional vehicle;
2 is a cross-sectional view showing a part of a rack pinion type steering apparatus of a conventional vehicle;
3 to 6 is a partial cross-sectional view showing a rack pinion type steering apparatus of a vehicle according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

3 to 6 is a partial cross-sectional view showing a rack pinion type steering apparatus of a vehicle according to an embodiment of the present invention.

As shown in these drawings, the rack pinion type steering apparatus of a vehicle according to an embodiment of the present invention includes a rack housing 150 in which a rack bar 230 is accommodated, and a tie rod coupled to the rack bar 230 by a ball joint. 110, a large diameter portion 310 coupled to the rack housing 150, a small diameter portion 330 coupled to the tie rod 110, and the large diameter portion 310 and the small diameter portion 330. It is provided with a contraction and relaxation portion 320 to connect, the inner peripheral surface of the small diameter portion 330 is configured to include a bellows 300 is formed with a projection (330a).

The bellows 300 is connected to the rack housing 150 and the tie rod 110 to prevent foreign matter from penetrating between the rack bar 230 and the rack housing 150 while contracting and relaxing during the reciprocating motion of the rack bar 230. , One side is coupled to the outer peripheral surface of the rack housing 150 is fixed and the other side is coupled to the outer peripheral surface of the tie rod 110 is fixed.

Thus, both sides of the bellows 300 fixed to the rack housing 150 and the tie rod 110 is folded to accommodate the reciprocating motion of the rack bar 230 and the tie rod 110 and can be expanded and contracted while being unfolded. So that it is formed in a pleated shape.

And, the bellows 300 is a large diameter portion 310 coupled to the rack housing 150, a small diameter portion 330 coupled to the tie rod 110, and connects the large diameter portion 310 and the small diameter portion 330 It is formed of a wrinkle-like contraction and relaxation portion 320.

When the bellows 300 is coupled to the tie rod 110, the large diameter portion 310 is coupled to the rack housing 150 while pushing and pushing the tie rod 110 to the small diameter portion 330, and the rack housing 150. ) Is fixed to the vehicle body and the tie rod 110 is reciprocating on the same axis as the rack bar 230.

The large diameter portion 310 and the small diameter portion 330 of the bellows 300 has the bellows 300 rack housing 150 or tie rod 110 while the bellows 300 contracts and relaxes during the reciprocating motion of the rack bar 230. It is secured by the fixing means 260 to prevent it from being pushed away from it.

In addition, the inner circumferential surface of the small diameter portion 330 is provided with a watertight means for preventing the penetration of moisture or foreign matter from the outside, wherein the watertight means is composed of a projection 330a and the groove 330b.

The protrusion 330a protrudes from the inner circumferential surface of the small diameter portion 330 and is integrally formed along the circumferential direction. The protrusion 330a may be provided at one or both ends of one side and the other end of the inner circumferential surface of the small diameter portion 330. have.

In addition, the protrusion 330a is formed to protrude obliquely at a predetermined angle with the radial direction of the inner diameter of the small diameter portion 330, so that the protrusion 330a is the tie rod 110 when the small diameter portion 330 is fitted to the tie rod 110. While being in close contact with the outer circumferential surface of the bellows 300 is to improve the watertightness and airtightness with the outside.

Therefore, when the bellows 300 is coupled with the tie rod 110 and fixed with the fixing means 260, the protrusion 330a which is in close contact with the outer circumferential surface of the tie rod 110 is tied by the tightening force of the fixing means 260. The watertightness and airtightness of the bellows 300 and the tie rod 110 are improved while elastic deformation is compressed to the outer circumferential surface of the 110.

In addition, a concave portion 330b is formed in the connecting portion between the inner circumferential surface of the small diameter portion 330 and the protrusion 330a and is formed as an annular groove along the circumferential direction, and the recess 330b is filled with grease 330c. It is intended to further enhance watertightness.

On the other hand, as shown in Figure 6 may be provided with a watertight means also on the inner circumferential surface of the large diameter portion 310 coupled to the rack housing 150, wherein the watertight means is composed of a projection (310a) and the groove portion (310b), Like the small diameter portion 330, the protrusion 310a protrudes from the inner circumferential surface of the large diameter portion 310 so as to be integrally formed along the circumferential direction, and the protrusion 310a may have any one of one side and the other end of the inner circumferential surface of the large diameter portion 310. It may be provided on one or both sides.

In addition, the protrusion 310a is formed to protrude obliquely at a predetermined angle with the radial direction of the inner diameter of the large diameter portion 310 so that when the large diameter portion 310 is inserted into the rack housing 150, the protrusion 310a is placed in the rack housing 150. While being in close contact with the outer circumferential surface of the bellows 300 is to improve the watertightness and airtightness with the outside.

Therefore, when the bellows 300 is coupled with the rack housing 150 and fixed with the fixing means 260, the protrusion 310a which is in close contact with the outer circumferential surface of the rack housing 150 is rack housing by the tightening force of the fixing means 260. The watertightness and airtightness of the bellows 300 and the rack housing 150 are improved while elastic deformation is compressed to the outer circumferential surface of the 150.

In addition, a concave groove 310b is formed in the connection portion between the inner circumferential surface of the large diameter portion 310 and the projection 310a, which is formed as an annular groove along the circumferential direction, and the concave groove 310b is filled with grease. It is designed to further enhance the watertightness while effectively blocking the inflow of dust or foreign matter from.

The bellows may be formed of an engineering plastics material such as polyacetal (POM), polyamide (PA), polycarbonate (PC), polyimide (PI), polybutylene terephthalate (PBT), or the like. NR (Natural Rubber), NBR (Nitrile Butadiene Rubber), CR (Chloroprene Rubber), Ethylene Propylene Terpolymer (EPDM), Fluoro Rubber (FPM), Styrene Butadine Rubber (SBR), Chlorosulphonated Polyethylene (CSM) It may be formed of an elastic material such as urethane, silicone, or the like.

According to the present invention having such a structure and shape, by using the bellows of a simple structure and shape, after assembling the bellows to the rack housing and tie rod prevents the escape from the rack housing when the bellows shrinks and relaxes by reciprocating the rack bar It is possible to prevent the inflow of foreign substances such as dust or moisture from the outside by increasing the, it is effective to improve the operability and durability.

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. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

110: tie rod 150: rack housing
230: rack bar 300: bellows
310: large neck 310a: protrusion
310b: groove portion 320: contraction and relaxation portion
330: small diameter portion 330a: projection portion
330b: groove

Claims (8)

A rack housing in which a rack bar is accommodated;
A tie rod coupled with the rack bar;
A bellows having a large diameter portion coupled to the rack housing, a small diameter portion coupled to the tie rod, and a contraction and relaxation portion connecting the large diameter portion and the small diameter portion, and a protrusion formed on an inner circumferential surface of the small diameter portion;
Rack pinion steering system of a vehicle comprising a. The method of claim 1,
The protrusion of the rack pinion type of the vehicle, characterized in that protruding from the inner peripheral surface of the small diameter portion in the circumferential direction. The method of claim 2,
The protrusion of the rack pinion type of the vehicle, characterized in that provided on one or both of one side and the other end of the inner peripheral surface of the small diameter portion. The method of claim 3, wherein
The protrusion is a rack pinion type steering apparatus of a vehicle, characterized in that protruding inclined at a predetermined angle with a radial direction of the inner diameter of the small diameter portion. The method of claim 3, wherein
Rack pinion steering device of the vehicle, characterized in that the groove portion formed along the circumferential direction is formed on the connection portion of the inner diameter surface and the projection of the small diameter portion. The method of claim 5, wherein
Rack recess pinion type steering apparatus of the vehicle, characterized in that the groove is filled with grease. 7. The method according to any one of claims 1 to 6,
Rack pinion type steering apparatus of the vehicle, characterized in that the projection is formed on the inner peripheral surface of the large diameter portion. The method of claim 7, wherein
Rack pinion type steering apparatus of the vehicle, characterized in that the groove portion formed along the circumferential direction is formed on the connection portion of the inner diameter of the large diameter portion and the projection.
KR1020110079096A 2011-08-09 2011-08-09 Rack and pinion type steering apparatus for vehicle KR20130016901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110079096A KR20130016901A (en) 2011-08-09 2011-08-09 Rack and pinion type steering apparatus for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110079096A KR20130016901A (en) 2011-08-09 2011-08-09 Rack and pinion type steering apparatus for vehicle

Publications (1)

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KR20130016901A true KR20130016901A (en) 2013-02-19

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KR1020110079096A KR20130016901A (en) 2011-08-09 2011-08-09 Rack and pinion type steering apparatus for vehicle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102315571B1 (en) * 2020-07-15 2021-10-21 주식회사 디엠씨 Bellows for steering system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102315571B1 (en) * 2020-07-15 2021-10-21 주식회사 디엠씨 Bellows for steering system

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