KR101735811B1 - Mounting structure of cowl cross member - Google Patents

Mounting structure of cowl cross member Download PDF

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Publication number
KR101735811B1
KR101735811B1 KR1020150130149A KR20150130149A KR101735811B1 KR 101735811 B1 KR101735811 B1 KR 101735811B1 KR 1020150130149 A KR1020150130149 A KR 1020150130149A KR 20150130149 A KR20150130149 A KR 20150130149A KR 101735811 B1 KR101735811 B1 KR 101735811B1
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KR
South Korea
Prior art keywords
cross member
cowl cross
flange
mounting structure
cowl
Prior art date
Application number
KR1020150130149A
Other languages
Korean (ko)
Other versions
KR20170032914A (en
Inventor
남윤식
Original Assignee
현대자동차주식회사
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Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020150130149A priority Critical patent/KR101735811B1/en
Publication of KR20170032914A publication Critical patent/KR20170032914A/en
Application granted granted Critical
Publication of KR101735811B1 publication Critical patent/KR101735811B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/081—Cowls
    • 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
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
    • B62D1/197—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible incorporating devices for preventing ingress of the steering column into the passengers space in case of accident
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The present invention relates to a mounting structure of a cowl cross member in which one end of a cowl cross member having a hollow tube shape is fitted in a flange of a mounting bracket fixed to a vehicle body, The cow cross member is detachable from the flange through the opening section when an impact is transmitted to the cowl cross member according to a vehicle collision.
According to the structure of the present invention as described above, when a vehicle collision occurs, the cow cross member is detached from the mounting bracket and no rotation moment generated in the conventional structure is generated, thereby preventing deformation of the steering wheel and the steering column.

Description

[0001] The present invention relates to a mounting structure of a cowl cross member,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a cowl cross member disposed in the lateral direction of a vehicle body in front of a steering wheel and a steering column, To a mounting structure of a cowl cross member capable of preventing deformation of a steering wheel and a steering column so that the deployment of the airbag can be performed at a normal position.

Vehicle legal safety standards and test safety standards are gradually increasing. In particular, the Insurance Institute for Highway Safety (IIHS) has added a small overlap test to the safety assessment to evaluate vehicle safety.

The Small Overlap test was conducted to determine that only 25% of the front of the vehicle (25% of the vehicle width) collided with the barrier when driving at 40 miles per hour (about 64 km / h) And evaluating the safety of the vehicle by measuring the amount of deformation of the vehicle and the amount of deformation of the vehicle.

On the other hand, in the passenger car, the cowl is a panel component mounted on the vehicle body so as to be connected to the front end of the windshield. The cowl is mounted between the engine room and the vehicle interior and is manufactured to have rigidity higher than a predetermined standard in order to prevent components mounted in the engine room from penetrating into the vehicle interior when a collision occurs in the vehicle.

A general cowl of a passenger car is configured such that an upper panel and a lower panel are coupled to each other, and a cow cross member 1 as shown in FIG. 1A is mounted in the vehicle width direction so as to reinforce the rigidity of the vehicle body therebetween.

The cow cross member 1 has a structure in which a center bracket 1a is extended and connected forward to reinforce the rigidity of a portion where the steering wheel 3 and a steering column (not shown) are mounted, And fixedly mounted on the mounting bracket 2.

That is, the mounting bracket 2 is formed with a hole into which the end of the cow cross member 2 can be inserted, and a ring-shaped flange 2a is formed along the circumference of the hole as shown in FIG. 1B And is welded at the contact portion between the flange 2a and the end of the cowl cross member 1 so as to be engaged.

On the other hand, in the case of such a cowl cross member mounting structure, a development process of the deformation at the time of a small overlap collision is as follows. Deformation occurs in the lower portion of the A-pillar of the vehicle body due to the collision with the barrier of 25% The load is transmitted to the mounted cowl cross member 1. At the same time, when the lower portion of the A-pillar is pushed, the cowle cross member 1 is also deformed, so that deformation of the steering column coupled with the steering wheel 3 is generated, and the driver's seat airbag can be deployed in the wrong direction There was a problem.

That is, as shown by arrows in FIG. 1A, when the load applied to the cowling cross member 1 at the maximum vehicle deformation time is compared, the load A applied to the mounting bracket 2 is applied to the center bracket 1a And the rotational moment C is generated at the point where the center bracket 1a is connected (that is, the portion placed on the steering column).

Accordingly, the steering wheel 3 is deformed to the right, and the airbag mounted on the steering wheel 3 is also moved to the right so that the occupant's head can not be properly protected.

Accordingly, the present invention provides a mounting structure of a cowl cross member that can prevent deformation of a steering wheel and a steering column even in a small overlap collision (so that the airbag can be normally deployed) so as to solve the above-described problems The main purpose is.

According to another aspect of the present invention, there is provided a mounting structure of a cowl cross member in which one end of a cowl cross member having a hollow tube shape is fitted in a flange of a mounting bracket fixed to a vehicle body, And the cowl cross member is detachable from the flange through the opening section when an impact is transmitted to the cowl cross member in response to a vehicle collision.

The flange is formed to have a length (d1 length) in the range of 65% to 75% in the circumferential length (the length of d1 + d2 in Fig. 5) in the case of a complete circular ring shape.

In the present invention, the cowl cross member is fastened to the mounting bracket through a coupling pipe having one end inserted into the cowl cross member and the other end inserted into the flange.

The connection pipe is formed with two stoppers supported on both ends of the open section to prevent rotation, and one or more collapse inducing holes are formed in the connection pipe so that collapse is induced when an impact of a predetermined size or more is applied.

Then, the connection pipe enters into the flange by interference fit and is tightened. A slit may be additionally formed in the coupling tube so that elastic deformation is induced when the flange enters the flange.

According to the structure of the present invention as described above, when a vehicle collision occurs, the cow cross member is detached from the mounting bracket and no rotation moment generated in the conventional structure is generated, thereby preventing deformation of the steering wheel and the steering column. That is, the amount of impact due to the collision is blocked by the departure of the cow cross member, so that the deformation of the steering wheel equipped with the driver's seat airbag is essentially blocked.

In the present invention, a connection pipe is additionally installed between the mounting bracket and the cowl cross member, and the connection pipe is separated from the collapse when a collision occurs, so that a part of the transmitted impact quantity can be buffered.

1A is a view showing a state where a cow cross member is mounted according to a conventional method,
FIG. 1B is an enlarged view of a portion where the cowl cross member and the mounting bracket are mounted in FIG. 1A,
2 is a view showing a state in which a collision occurs in a mounting structure of a cowl cross member according to a first embodiment of the present invention and a cowl cross member is detached through an opening section of the flange,
3 is a view showing a state in which a coupling pipe is fastened between a cowl cross member and a mounting bracket according to a second embodiment of the present invention,
4 is a view showing a state in which a coupling pipe is fastened between a cowl cross member and a mounting bracket according to a second embodiment of the present invention,
5 is a view showing a mounting bracket according to the present invention,
6A and 6B are views showing the front and rear views of the point where the connector is mounted,
7 shows the length (e) of the connecting tube entering the flange and the length (f) of entering the connecting tube at the end of the cowl cross member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order that the present invention can be easily carried out by those skilled in the art. 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 the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor should properly define the concept of the term to describe its invention in the best way. It should be construed as meaning and concept consistent with the technical idea of the present invention.

The present invention relates to a cow cross member mounting structure in which one end of a cowl cross member (20) having a hollow tube shape is fitted in a ring-shaped flange (11) of a mounting bracket (10) Reference will now be made in detail to the preferred embodiments of the present invention.

2, in the first embodiment of the present invention, the flange 11 protruding from the periphery of the hole 12 in the mounting bracket 10 is formed in a circular ring shape with a part of the section being cut off, (13). The open section 13 is formed to be positioned on the rear side of the vehicle body and has a length corresponding to 25 to 35% of the circumference.

That is, the flange 11 has a length (length d1) corresponding to a range of 65% to 75% at the portion where the flange 11 is formed in the circumferential length (the length of d1 + d2 in Fig. 5) , And the length of the open section (the length of d2) has a length corresponding to 25 to 35% (preferably 30%).

The cowl cross member 20 is coupled to the hole 12 formed in the flange 11 in the same manner as in the conventional method. In the present invention, when an impact amount is transmitted to the cowl cross member 20, The member 20 is released from the flange 11 through the opening section 13 (along with the elastic deformation of the cowl cross member and the open end upper and lower sections).

That is, the rotational moment that causes deformation of the steering wheel and / or the steering column is inherently blocked as the cow cross member 20 is disengaged.

In addition, the present invention further comprises a connector 30 as a second embodiment. 3 and 4, one end of the coupling pipe 30 is fitted to the outer peripheral surface or the inner peripheral surface of the end of the cowl cross member 20, and the other end is fitted in the flange 11 and is fastened.

That is, as shown in FIG. 7, the connecting pipe 30 enters into the flange 11 by an 'e' (preferably, 20 mm) forced fit method and is fastened to the mounting bracket 10, After the cowl cross member 20 enters the connection pipe 30 by an amount of 'f' (preferably 20 mm), the portion where the cow cross member 20 is abutted is joined by CO 2 welding. At this time, the connection pipe 30 may be additionally provided with a slit 33 for inducing elastic deformation so that the connection pipe 30 can smoothly enter the flange 11 when entering the flange 11.

6A and 6B, the connection pipe 30 is formed with two stoppers 32a and 32b which are respectively supported at both ends of the opening section 13 to prevent rotation, The collapse inducing holes 31a and 31b are formed in the at least one collapse inducing hole, preferably at the front side and the rear side, respectively, so that collapse is induced when an impact of a predetermined size or more is applied.

Therefore, when the impact is transmitted to the cowl cross member 20 in this structure, the separation and collapse of the coupling pipe 30 are simultaneously induced. That is, since the coupling pipe 30 is welded to the cowl cross member 20, an amount of impact is transmitted, and a part of the impact amount induces collapse of the coupling pipe 30 and partly induces detachment. At this time, in the vicinity of the collapse induction holes 31a and 31b formed in the coupling pipe 30, a full plastic moment is generated to cause rapid collapse. By the deformation due to the collapse, (More rapidly than the structure of the first embodiment) through the mounting bracket 13.

According to the structure of the present invention having such a configuration, when the vehicle collision occurs, the cowl cross member 20 is separated from the mounting bracket 10, and no rotation moment generated in the conventional structure is generated. Thus, the steering wheel and the steering column are prevented from being deformed .

In addition, a connection pipe 30 is additionally installed between the mounting bracket 10 and the cowl cross member 20, and the connection pipe 30 is separated from the collapse when a collision occurs to buffer a part of the transmitted impact quantity .

Further, in order to prevent the steering wheel or / and the steering column from being bent, a plurality of reinforcing members for supporting the amount of impact and the moment of rotation transmitted from the cowl cross member are additionally mounted. In the present invention, It is possible to cut off the problem (deformation of the deployment angle of the airbag) of the airbag (without increasing the cost due to the additional installation of the reinforcing member and the weight of the vehicle) since the path to the steering column is blocked in the middle.

For reference, in the specification of the present invention, the length (d2 length) of the open section 13 varies depending on the specification of the vehicle and the contact section between the connecting pipe 30 and the flange 11, To 35%, but it may be formed to be larger or smaller so as to ensure the detachment of the cowl cross member or the connecting pipe in the event of a small overlap collision, . Further, partial welding may be performed to the contact portion between the connecting pipe 30 and the flange 11 to increase the connectivity.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be apparent to those of ordinary skill in the art.

10: Mounting bracket
11: Flange
13: open section
20: Cow Crossmember
30: Connector

Claims (6)

A mounting structure of a cowl cross member in which one end of a cowl cross member having a hollow tube shape is fitted in a flange of a mounting bracket fixed to a vehicle body,
Wherein the flange has an open section such that the flange is formed in a circular ring shape in which a part of the flange is cut off. When an impact is transmitted to the cowl cross member due to a vehicle collision, the cowl cross member is detachable from the flange through the open section,
Wherein the cowl cross member is fastened to the mounting bracket through a connecting tube having one end inserted into the cowl cross member and the other end inserted into the flange.
The mounting structure of a cowl cross member according to claim 1, wherein the flange is formed to have a length ranging from 65% to 75% in a circumferential length in the case of a complete circular ring shape.
delete The mounting structure of a cowl cross member according to claim 1, wherein the connection pipe is formed with two stoppers supported on both ends of the opening section to prevent rotation.
The mounting structure of a cowl cross member according to claim 1, wherein a collapse induction hole is formed in the coupling pipe so that collapse is induced when an impact of a predetermined size or more is applied.
The mounting structure of a cowl cross member according to claim 1, wherein the connecting tube is formed with a slit so as to enter the flange by interference fit, and to induce elastic deformation upon entry.
KR1020150130149A 2015-09-15 2015-09-15 Mounting structure of cowl cross member KR101735811B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150130149A KR101735811B1 (en) 2015-09-15 2015-09-15 Mounting structure of cowl cross member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150130149A KR101735811B1 (en) 2015-09-15 2015-09-15 Mounting structure of cowl cross member

Publications (2)

Publication Number Publication Date
KR20170032914A KR20170032914A (en) 2017-03-24
KR101735811B1 true KR101735811B1 (en) 2017-05-16

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Application Number Title Priority Date Filing Date
KR1020150130149A KR101735811B1 (en) 2015-09-15 2015-09-15 Mounting structure of cowl cross member

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KR20170032914A (en) 2017-03-24

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