KR20150043833A - Steering apparatus for vehicle - Google Patents

Steering apparatus for vehicle Download PDF

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Publication number
KR20150043833A
KR20150043833A KR20130122750A KR20130122750A KR20150043833A KR 20150043833 A KR20150043833 A KR 20150043833A KR 20130122750 A KR20130122750 A KR 20130122750A KR 20130122750 A KR20130122750 A KR 20130122750A KR 20150043833 A KR20150043833 A KR 20150043833A
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KR
South Korea
Prior art keywords
cover
opening
steering apparatus
circumferential surface
steering
Prior art date
Application number
KR20130122750A
Other languages
Korean (ko)
Inventor
윤성일
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 KR20130122750A priority Critical patent/KR20150043833A/en
Publication of KR20150043833A publication Critical patent/KR20150043833A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/20—Connecting steering column to steering gear
    • 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
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • 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
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0421—Electric motor acting on or near steering gear

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The present invention relates to a steering apparatus of a car. According to an embodiment of the present invention, the steering apparatus of a car comprises: a gear box housing having an opening on one side thereof, and having a concave groove circumferentially formed on the inner circumferential surface of the opening; and a cover coupled to the opening, and having a coupling part protruding from the upper side of the outer circumferential surface thereof and coupled to the groove. In contrast with an existing steering apparatus having a housing and a cover coupled to each other by bolts or the like, the steering apparatus according to the embodiment of the present invention is capable of securing the coupling and the decoupling force of the cover against the gear box housing properly, and is capable of remarkably reducing time and the number of components required to assemble the steering apparatus.

Description

[0001] Steering apparatus for vehicle [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a steering apparatus for an automobile, and more particularly to a steering apparatus for a vehicle, The number of components, and the like can be drastically reduced.

1 is a schematic view of an electric steering system of a conventional automobile.

1, a conventional electric motor-driven steering apparatus includes a steering wheel 110, a steering shaft 135, a torque sensor 120, an electronic control unit (ECU) 130, a driving unit 140 A rack bar 190, a first pinion gear 160, a first rack gear 150, a second pinion gear 170, a second rack gear 180 and a link portion 195.

When the driver rotates the steering wheel 110, the steering shaft 135 rotates, whereby the first pinion gear 160 formed at the end of the steering shaft 135 rotates, and the first pinion gear 160 rotates The first pinion gear 160 is engaged with the first rack gear 150 formed on the rack bar 190 so that the rotational motion of the first pinion gear 160 is converted into the lateral movement of the rack bar 190, (Not shown).

A torque sensor 120, a steering angle sensor 115, a vehicle speed sensor 125 and the like are provided as sensing means for assisting the steering force of the driver. When the driver rotates the steering wheel 110, The steering angle sensor 115 senses the rotation angle of the steering wheel 110 and the vehicle speed sensor 125 senses the speed of the vehicle to detect an electric And transmits the signal to the electronic controller 130.

The electronic control unit 130 computes an electric signal and transmits it to the driving unit 140 and includes a driving motor (not shown), a torque limiter (not shown), a speed reducer (not shown) and a second pinion gear 170 The driving unit 140 rotates the second pinion gear 170 according to the torque, the rotation angle, and the speed of the automobile received from the ECU 130. The rack unit 190, in which the second rack gear 180 is formed, The steering assist force is provided.

In the electric steering system of the conventional automobile having such a construction, a cover mounted on a housing that surrounds the drive motor and the speed reducer constituting the drive unit is coupled with a bolt or the like. It takes a lot of time to assemble the housing and the cover, There is a problem that the number of parts increases and the production cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above background and it is an object of the present invention to provide a cover for a gearbox housing, The present invention aims to provide a steering apparatus for a vehicle which can be remarkably reduced.

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, there is provided a gear box comprising: a gear box housing having an opening formed at one side thereof and a groove formed in a circumferential direction on an inner circumferential surface of the opening; And a cover coupled to the opening and having an engaging portion protruding from the radial outer circumferential surface and coupled to the groove.

According to the embodiment of the present invention, compared with the conventional housing and cover assembled by bolts or the like, the time required for assembling and the number of parts and the like can be remarkably improved There is an effect that can be reduced.

1 is a schematic view of an electric steering system of a conventional automobile.
2 is an exploded perspective view showing a gear box housing, a cover, and the like of an automotive steering system according to an embodiment of the present invention.
3 is an exploded cross-sectional view of part of FIG.
Fig. 4 is an assembled sectional view of Fig. 3. Fig.
5 is a graph showing a fastening force required when the cover is coupled according to the inner diameter of the gearbox housing of FIG.
FIG. 6 is a graph showing the removal force of the cover coupled with the inner diameter of the gearbox housing of FIG. 2;

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 an exploded perspective view showing a gear box housing, a cover, and the like of an automotive steering system according to an embodiment of the present invention. 3 is an exploded cross-sectional view of part of FIG. Fig. 4 is an assembled sectional view of Fig. 3. Fig. 5 is a graph showing a fastening force required when the cover is coupled according to the inner diameter of the gearbox housing of FIG. FIG. 6 is a graph showing the removal force of the cover coupled with the inner diameter of the gearbox housing of FIG. 2;

1, an automotive steering apparatus according to an embodiment of the present invention includes an opening 211 formed at one side thereof and a groove (not shown) formed in a circumferential direction on an inner circumferential surface of the opening 211 A gear box housing 210 in which a plurality of gears 301 are formed; And a cover 230 coupled to the opening 211 and having an engaging portion 231 protruding from the outer circumferential surface of the radial direction to be coupled to the groove 301.

The steering shaft 135 is connected to the steering wheel 110 so that when the driver rotates the steering wheel 110, the steering shaft 135 is rotated in association with the rotation of the steering wheel 110. At the end of the steering shaft 135, The first pinion gear 160 is rotated in accordance with the rotation of the steering shaft 135. [

The first pinion gear 160 is engaged with the first rack gear 150 formed on the rack bar 190 so that the rotational motion of the first pinion gear 160 is converted into linear movement of the rack bar 190 in the left- Thereby steering the wheel 145 through the link portion 195.

The electronic control unit 130 calculates an electric signal input from the torque sensor 120, the steering angle sensor 115 and the vehicle speed sensor 125 and transmits the electric signal to the driving unit 140, And provides the steering assist force to the rack bar 190 based on the electrical signal input from the apparatus 130.

The second pinion gear 170 and the second rack gear 180 are mounted on the steering shaft 120. The torque sensor 120 and the steering angle sensor The electronic control unit 130 calculates the electrical signal and transmits the electrical signal to the driving unit 140. The driving unit 140 receives the electric signal from the vehicle speed sensor 115, the vehicle speed sensor 125, and the like.

The driving unit 140 provides a steering assist force to the rack bar 190 according to an electrical signal inputted as described above. The driving unit 140 includes a motor (not shown), a worm shaft A gear box housing 210 which is engaged with a worm shaft and which surrounds a worm wheel (not shown) coupled to the second pinion gear 170, a worm shaft and a worm wheel, a cover 230 coupled to the gear box housing 210, And the like.

The gearbox housing 210 has an opening 211 at one side thereof. The gearbox housing 210 surrounds a worm shaft (not shown) and a worm wheel (not shown). The gearbox housing 210 Grooves 301 are formed in the inner circumferential surface of the opening 211 in the circumferential direction.

A through hole 305 is formed in the other side of the gear box housing 210. The second pinion gear 170 is inserted through the through hole 305 and the second pinion gear 170 is coupled to the worm wheel Not shown).

A tapered surface 303 is formed at the uppermost portion of the inner circumferential surface of the opening 211 of the gearbox housing 210 so that a cover 230 to be described later can be easily inserted.

The cover 230 is then coupled to the opening 211 of the gearbox housing 210. The operator aligns the cover 230 with the opening 211 of the gear box housing 210 and then presses the cover 230 So that the cover 230 is inserted into the opening 211 of the gear box housing 210 to be engaged.

The engaging portion 231 protrudes from the outer circumferential surface of the cover 230 when the cover 230 is engaged with the opening 211 of the gear box housing 210 301 so that the cover 230 can be firmly coupled to the gearbox housing 210. [

At least two or more coupling portions 231 may be formed on the radial outer peripheral surface of the cover 230. The coupling portions 231 may be formed on the outer peripheral surface of the cover 230 in the radial direction, And may be formed at equal intervals in the circumferential direction.

An elastic member insertion groove 233 having a concave shape in the circumferential direction may further be formed below the outer circumferential surface of the cover 230 in the radial direction. In the elastic member insertion groove 233, an annular elastic member 250 And the elastic member 250 seals between the gear box housing 210 and the cover 230.

The cover 230 may be formed to contain 24 to 26 weight percent of glass fiber (GF) in the polyamide fiber PA66. In the conventional polyamide fiber PA66, the glass fiber GF is 33 Compared with the cover formed by containing the weight percentage, the following features are present.

Figure pat00001

That is, as compared with the conventional cover, the cover 230 according to the embodiment of the present invention has a structure in which the content of the glass fiber GF is reduced, and the elongation rate is increased and the elastic force for assembling and fastening is enhanced It is done.

Referring to the drawings, the engaging force and releasing force of the cover coupled according to the inner diameter of the gear box housing will be examined.

The inner diameter 2R H of the gear box housing 210 used in the test was MIN: 98.0 mm, MED: 98.025 mm, MAX: 98.05 mm, and the outer diameter of the cover 230 with respect to each gear box housing 210 2R C ) of 98.4 mm was tested as test 1, 3 and 5, and the case of 98.6 mm was tested as 2, 4, and 6, respectively.

Figure pat00002

Referring to Table 2 and FIG. 5 and FIG. 6, it can be seen that the separating force of the cover 230 with respect to the gearbox housing 210 is greater than the engaging force. Accordingly, When the gear box housing 210 is mounted on the gear box housing 210, the gear box housing 210 can be stably closed without being easily detached.

As described above, according to the embodiment of the present invention, compared to the conventional housing and the cover are assembled with bolts or the like, the time required for assembly and the time required for assembling The number of components can be drastically reduced.

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.

110: steering wheel 115: steering angle sensor
120: torque sensor 125: vehicle speed sensor
130: Electronic control unit 135: Steering axis
140: driving part 145:
150: first rack gear 160: first pinion gear
170: second pinion gear 180: second rack gear
190: Rack bar 195: Link part
210: gearbox housing 211: opening
230: cover 231:
301: Groove

Claims (4)

A gear box housing having an opening formed at one side thereof and a groove formed in a circumferential direction at an inner circumferential surface of the opening; And
A cover coupled to the opening and having an engaging portion protruding from the outer circumferential surface in the radial direction;
And a steering angle sensor for detecting steering angle of the steering wheel. The method according to claim 1,
Wherein at least two engaging portions are formed on the radial outer circumferential surface of the cover. 3. The method of claim 2,
Characterized in that the engaging portions are formed at regular intervals in the circumferential direction on the radial outer circumferential surface of the cover The method according to claim 1,
Characterized in that the cover has an elastic member insertion groove formed in a groove-like shape in a circumferential direction below the radial outer circumferential surface.
KR20130122750A 2013-10-15 2013-10-15 Steering apparatus for vehicle KR20150043833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130122750A KR20150043833A (en) 2013-10-15 2013-10-15 Steering apparatus for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130122750A KR20150043833A (en) 2013-10-15 2013-10-15 Steering apparatus for vehicle

Publications (1)

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KR20150043833A true KR20150043833A (en) 2015-04-23

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KR20130122750A KR20150043833A (en) 2013-10-15 2013-10-15 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
US20220332361A1 (en) * 2021-04-15 2022-10-20 Jtekt Europe Method for fastening a cover on an orifice of a power steering system and such a cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220332361A1 (en) * 2021-04-15 2022-10-20 Jtekt Europe Method for fastening a cover on an orifice of a power steering system and such a cover

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