KR101990463B1 - Integrated cowl cross member by plastic injection molding method - Google Patents

Abstract

Disclosed is a cowl cross member having an integrated forming structure by plastic injection. According to the present invention, the cowl cross member having the integrated forming structure by plastic injection includes: a middle bracket having an upper bracket unit coupled to a dash panel and a column bracket unit coupled to a steering column; and a pair of cowl cross bars extended from the middle bracket to the opposite side of each other and coupled to side panels on both sides of a vehicle body by a bracket on each side. The cowl cross bar and the middle bracket are integrated by plastic injection. The upper bracket is connected to multiple first insert nuts to be coupled to the dash panel by a first bolt. The column bracket unit is connected to multiple second insert nuts to be coupled to the steering column by a second bolt. The middle bracket includes: a body connected to the first insert nut and the second insert nut; and a reinforcing rib connecting the body to the cowl cross bar.

Description

[0001] INTEGRATED COWL CROSS MEMBER BY PLASTIC INJECTION MOLDING METHOD [0002]

The present invention relates to a cow cross member having a plastic injection molded molded structure, and more particularly, to a cow cross member having a plastic injection molded structure in which a cow crossbar and a bracket are integrally formed by plastic injection.

The COWL CROSS MEMBER is used as a skeleton to prevent warpage and distortion of the vehicle in the left and right direction and to enhance the durability of the car body. It provides a guide surface on which various electric parts of the instrument panel are mounted, .

In general, the cowl cross member is made of a hollow pipe made of a steel material and has a cowl crossbar arranged in the transverse direction of the vehicle body in front of the driver's seat and the front passenger's seat. The mounting brackets formed at both ends of the cowl crossbar It is fixed inside the panel.

The cowl crossbar is coupled with a plurality of brackets for supporting a steering column, an instrument panel, an airbag device, and the like. Conventionally, a plurality of brackets are welded to a cowl crossbar made of a metal material. Recently, in the automobile manufacturing industry, a bracket made of a plastic material is applied to solve the weakening of welding strength due to vehicle vibration and to reduce the total weight of the vehicle .

In this regard, Korean Patent Laid-Open Publication No. 2005-0017204 discloses a support bracket structure for fixing a steering column of an automobile, and Japanese Laid-Open Patent Publication No. 2005-0017204 discloses a cowl cross plate which is screw- And a support bracket coupled to one side of the support plate and made of a steel material to reinforce the rigidity of the support plate. The brake pedal is hingably connected to a lower portion of the support bracket.

Japanese Patent Application Laid-Open No. 2005-0017204 has an advantage in that the number of components is reduced by increasing the rigidity while reducing the weight of the support bracket for fixing the steering column and hinging the brake pedal portion at the lower portion thereof.

Korean Patent Publication No. 568710 discloses a structure of a center support bracket, and Korean Patent Publication No. 568710 discloses a cowl cross member having an upper end coupled to a cowl cross member, A pair of side portions extending downward from both ends of the upper end portion; A center support bracket integrally formed with a plastic material for connecting the middle portion of the side portion and allowing the mounting of the acoustic system, the upper portion having a bent shape for seating the cowl cross member And the upper end is formed with a through hole, and the rivet passes through the through hole and the cowl cross member through the washer to fix the cowl cross member to the upper end portion.

Patent No. 568710 discloses a method for manufacturing a molded product by integrally molding plastic using a plastic material so that it is possible to reduce the weight of the part to improve the fuel consumption and the vibration damping effect due to the characteristics of the plastic material itself. And there is no mold design cost for designing a large number of plates in the past, which is advantageous in reducing the cost of the product.

However, in Japanese Unexamined Patent Application Publication No. 2005-0017204 and No. 568710, holes are formed in the cowl crossbar and the bracket to fasten brackets made of different materials of plastic to metal cowl crossbars, and bolts, nuts, or rivets The coupling structure by the physical fastening means may be such that the rigidity of the coupling structure is long lasting as the stress due to vehicle vibration and external impact is concentrated on the hole into which the fastening means is inserted or the physical fastening means itself There was a problem that noise easily occurred.

In addition, in Patent Publication Nos. 2005-0017204 and 568710, a plurality of brackets for supporting a steering column, an instrument panel, an airbag device, and the like must be respectively formed. Therefore, an injection mold has to be separately prepared for each bracket, This increases the workload and the production cost.

In this regard,

Patent Registration No. 1797460 (Registered on Nov. 2017) Korean Patent Publication No. 2005-0017204 (Published on February 22, 2005) Korean Registered Patent No. 568710 (Registered on March 31, 2006)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cowl crossbar and a bracket which are integrally manufactured by plastic injection and which can form a simple yet rigid bolt fastening structure with a vehicle body and a steering column to prevent a bolt fastening structure And to provide a cow cross member having an integrated molding structure.

In addition, it is an object of the present invention to provide a cow cross member having a plastic injection-molded structure that is formed to form a rigid rib structure in a cow crossbar and a bracket to provide sufficient strength.

According to an aspect of the present invention, there is provided a steering system comprising: an upper bracket coupled to a dash panel; a middle bracket forming a column bracket coupled to the steering column; And a pair of cowl crossbars extending opposite to each other from the middle brackets and fastened to both side panels of the vehicle body through respective side brackets, wherein the cowl crossbars and the middle brackets are integrally manufactured by plastic injection molding A plurality of first insert nuts are coupled to the upper bracket portion to be coupled with the dash panel and a first bolt, and a plurality of second insert nuts are coupled to the column bracket portion to be coupled to the steering column and the second bolt, The middle bracket includes a body to which the first insert nut and the second insert nut are coupled; And a reinforcing rib that connects the body with the cowl crossbar. The cow cross member has a plastic injection-molded forming structure.

The first insert nut may include: a 1-1 insert nut coupled to an upper end of the upper bracket; A 1-2 insert nut spaced horizontally from the 1-1 insert nut; And a third insert nut coupled to a lower end of the upper bracket portion.

The first bolt includes a head engaged with the dash panel and a threaded body screwed into the first insert nut, the body including: a cylindrical body extending from the head; And a plurality of spaced apart bodies each extending from the cylindrical body and formed along a circumferential direction of the cylindrical body, wherein an insertion space for inserting a fitting member is formed between the plurality of spaced bodies, Can be made to extend in directions away from each other by the shim member.

The second bolt includes a head engaged with the second insert nut and a threaded body screwed into the second insert nut, the body including: a cylindrical body extending from the head; And a plurality of spaced apart bodies each extending from the cylindrical body and formed along a circumferential direction of the cylindrical body, wherein an insertion space for inserting a fitting member is formed between the plurality of spaced bodies, Can be made to extend in directions away from each other by the shim member.

Wherein a plurality of grooves are formed on an inner surface of the detachable body so as to form a height in a longitudinal direction of the detachable body, and the fitting member includes: an insertion portion slidably inserted into the insertion space; And an annular engaging portion formed on an outer surface of the inserting portion and inserted into the groove to push the plurality of spacing bodies in directions away from each other.

The cylindrical body may be formed with an insertion groove, and the insertion portion may be formed with a tip portion to be inserted into the insertion groove.

The insertion portion may be formed with a coupling groove into which an operation rod is screwed, and when the external force is applied to the operation rod, the insertion member may be inserted into or removed from the insertion space depending on the direction of the external force.

The cowl crossbar includes an upper cross plate provided between the middle bracket and the side bracket; A lower cross plate provided below the upper cross plate; A connecting cross plate connecting the upper cross plate and the lower cross plate; And a reinforcing rib that connects the upper cross plate, the lower cross plate, and the connecting cross plate between the upper cross plate and the lower cross plate, and the reinforcing rib may be exposed to the dash panel.

The reinforcing rib includes: a plurality of hubs protruding from the connecting cross plate toward the dash panel; A connecting rib connecting the connecting cross plate and the plurality of hubs; An upper rib connecting the upper cross plate, the connecting cross plate, and the hub; And a lower rib connecting the lower cross plate, the connecting cross plate, and the hub.

The side brackets may be formed so that the guide pins and the jig holes to be coupled to the side panels are integrally formed with the side brackets by plastic injection molding.

According to the present invention, a plurality of first insert nuts are coupled to the dash panel and a first bolt are coupled to the upper bracket, and a plurality of second insert nuts are coupled to the column bracket to be coupled to the steering column and the second bolt , The cow crossbar and the bracket are integrally manufactured by plastic injection and have a plastic injection unified molding structure in which a bolt fastening structure simple and rigid with the vehicle body and the steering column is formed so as to prevent loosening of the bolt fastening structure by vehicle vibration You will be able to provide cowl cross members.

In addition, the reinforcing ribs connect the upper crossover plate, the lower crossover plate and the connecting cross plate between the upper cross plate and the lower cross plate, while the reinforcing ribs connect the cow crossbar and the body to form a rigid rib structure in the cow crossbar and bracket It becomes possible to provide a cow cross member having a plastic injection-molded forming structure which is formed so as to have sufficient strength.

1 and 2 are perspective views of a cow cross member having a plastic injection molded forming structure according to an embodiment of the present invention;
Figs. 3 to 5 are partially enlarged views of a cow cross member having the plastic injection-molded forming structure of Fig. 2;
Fig. 6 is a view showing a bolt fastening structure of a steering column and a cow cross member having the plastic injection-molded forming structure of Fig. 1; Fig.
Fig. 7 is a partial perspective view showing a column bracket portion of a cow cross member having the plastic injection-molded forming structure of Fig. 1; Fig.
8 is a partial cross-sectional view showing a column bracket portion of a cow cross member having the plastic injection-molded forming structure of Fig.
9 to 10 are views showing a second bolt of a cow cross member having the plastic injection-molded forming structure of FIG. 1;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

The cowl cross member having the plastic injection-molded forming structure of the present invention is a cowl cross member in which the cowl crossbar and the bracket are integrally manufactured by plastic injection and form a simple yet rigid bolt fastening structure with the vehicle body and the steering column, So as to prevent loosening of the structure.

In addition, the cow cross member having the plastic injection-molded forming structure of the present invention is formed so as to form a rigid rib structure in the cow crossbar and the bracket to form sufficient strength.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cowl cross member having a plastic injection molding forming structure, Fig. 6 is a view showing a bolt fastening structure of a steering column and a cow cross member having a plastic injection-molded forming structure shown in Fig. 1, and Fig. 7 is a view showing a bolt fastening structure of a cow cross member of a cow cross member having a plastic injection- Fig. 8 is a partial cross-sectional view showing a column bracket part of a cow cross member having the plastic injection-molded forming structure of Fig. 1, and Figs. 9 to 10 are cross-sectional views of a cow cross member having the plastic injection- 2 is a view showing a second bolt.

As shown in FIGS. 1 and 2, a cow cross member 10 having a plastic injection molding forming structure according to an embodiment of the present invention includes a cowl crossbar 100 and a bracket integrally formed by plastic injection A cowl crossbar 100, and a middle bracket 200. As shown in Fig.

In the present invention, the cowl crossbar 100 and the middle bracket 200 are integrally formed by plastic injection molding. Reference numeral 300 denotes a lower bracket bolted to a lower portion of a vehicle body (not shown).

The present invention has technical features in the cow crossbar (100) and the middle bracket (200). Therefore, in order to facilitate understanding of the present invention, a detailed description of the brackets other than the middle bracket 200 will be omitted.

As shown in Figs. 1 and 2, the cowl crossbar 100 is arranged in the transverse direction of the vehicle body in front of the driver's seat and the front passenger's seat. The cowl crossbar 100 includes a pair of side brackets (not shown) 150 are integrally injection-molded.

3 and 4, the guide pin 151 and the jig hole 152 are integrally injection-molded into the side bracket 150. As shown in FIG. Korean Patent Publication No. 1754764 discloses a cowl crossbar connecting structure in which a conventional side bracket is provided with an assembly hole into which a guide pin is inserted and the guide pin is inserted into an assembly hole in the assembly process of the cowl crossbar, Respectively.

However, in the related art, since the cowl crossbar is simply supported in a state where the guide pin is inserted into the assembly hole, there is a problem that the guide pin is rotated by the load of the crash pad or the like and the binding force with the side panel is weakened or released.

The cow cross member 10 having the plastic injection molding forming structure of the present invention is constructed such that the guide pin 151 to be fastened to the side panel is integrally formed with the side bracket 150 by plastic injection molding, Thereby solving the problem of the technology.

As shown in FIGS. 1 to 4, the cowl crossbars 100 are provided as a pair and extend opposite to each other from the body 210 of the middle bracket 200. 1, the cowl crossbar 100 extending to the right in the middle bracket 200 is denoted by 100A and the cowl crossbar 100 extending to the left in the middle bracket 200 is denoted by 100B.

1 to 5, the cowl crossbar 100 includes an upper cross plate 110, a lower cross plate 120, a connecting cross plate 130, and a reinforcing rib 140. The upper cross plate 110, the lower cross plate 120, the connecting cross plate 130 and the reinforcing ribs 140 connect the middle bracket 200 and the side bracket 150, respectively.

5, the upper cross plate 110 is provided between the middle bracket 200 and the side bracket 150, the lower cross plate 120 is provided below the upper cross plate 110, The connecting cross plate 130 connects the upper cross plate 110 and the lower cross plate 120.

The upper cross plate 110 and the connecting cross plate 130 and the lower cross plate 120 and the connecting cross plate 130 form an acute angle or obtuse angle with each other along the longitudinal direction, The upper cross plate 110, the lower cross plate 120, and the connecting cross plate 130 are connected between the lower cross plate 110 and the lower cross plate 120. [

2 to 5, the reinforcing rib 140 includes a hub 141, a connecting rib 142, an upper rib 143, and a lower rib 144.

The plurality of hubs 141 protrude from the connecting cross plate 130 toward the dash panel and the connecting ribs 142 connect the connecting cross plate 130 and the plurality of hubs 141. The upper rib 143 connects the upper cross plate 110 and the connecting cross plate 130 and the hub 141 and the lower rib 144 connects the lower cross plate 120 and the connecting cross plate 130, (141).

Accordingly, the connection rib 142, the upper rib 143, and the lower rib 144 are connected to the upper cross plate 110, the lower cross plate 120, the connection cross plate 130, and the adjacent hubs 141, the cowl crossbar 100 forms a rigidity that resists warpage and torsional deformation as well as compression and tensile deformation.

3 to 5, the cowl crossbar 100 and the bracket are provided with a plurality of insert nuts (not shown) for fastening the cowl cross member 10 to the vehicle body or for fastening the passenger's seat airbag, knee protection airbag, glove box, N1 and the push nut N2 are combined. The insert nut (N1) is fastened to the vehicle part by the bolt (B).

As shown in FIG. 5, the hub 141 may be coupled with an insert nut N1. The connecting rib 142, the upper rib 143 and the lower rib 144 extend in six directions about the hub 141 to form a rigidity resisting deformation of the cow crossbar 100, And the above-described fastening structure with the vehicle part by the insert nut N1 are firmly maintained.

3, the middle bracket 200 is configured to be coupled to a dash panel (not shown) and a steering column SC, and includes a body 210 and a reinforcing rib 220.

The body 210 and the reinforcing rib 220 form a shape extending forwardly and rearwardly of the vehicle body with respect to the cowl crossbar 100. The body 210 and the reinforcing rib 220 form an upper bracket portion 200A on the front side of the cowl crossbar 100 and a column bracket portion 200B on the rear side of the vehicle body.

The body 210 forms a portion where the upper bracket portion 200A and the vehicle body, the column bracket portion 200B, and the steering column SC are bolted to each other. The reinforcing rib 220 reinforces the body 210 and connects the body 210 to the cowl crossbar 100 to prevent the body 210 and the cowl crossbar 100 from being twisted or warped.

2 and 3, a plurality of first insert nuts N10 are coupled to the upper bracket portion 200A of the body 210 to be coupled with the dash panel and the first bolt B100.

The first insert nut N10 may be inserted into the hole formed in the upper bracket portion 200A of the body 210 after the injection molding is completed, or may be inserted when the cow cross member 10 is integrally injection molded. As the first insert nut N10, various types of insert nuts known in the art may be selectively used.

3, the first insert nut N10 includes a first insert nut N11, a first insert nut N12, and a first insert nut N13 . The first 1-1 insert nut N11, the 1-2 insert nut N12, and the 1-3 insert nut N13 are fastened to the dash panel by the first bolt B100, respectively.

The 1-1 insert nut N11 and the 1-2 insert nut N12 are coupled to the upper end of the upper bracket part 200A and are spaced apart from each other in the horizontal direction. The 1-3 insert nut N13 is inserted into the upper bracket 200A, And is coupled to the lower end of the portion 200A. Therefore, the upper bracket portion 200A of the body 210 forms a rigid fastening structure with the dash panel at three points by the three first bolts B100.

The first bolt B100 comprises a head B210 and a body B220. The body B220 forms a thread to be screwed into the first insert nut N10. The head B210 does not pass through the hole formed in the dash panel when the bolt is fastened, and is caught on the dash panel.

6 to 8, a pair of second insert nuts N20 are coupled to the column bracket portion 200B of the body 210 so as to be coupled by the steering column SC and the second bolts B200. do.

The second insert nut N20 may be inserted in the integral injection molding of the cowl cross member 10 and may be inserted into a pair of holes formed in the column bracket portion 200B of the body 210 after injection molding is completed, . As the second insert nut N20, various kinds of known insert nuts may be selectively used.

As shown in Figs. 6 and 8, the pair of second insert nuts N20 are fastened to the steering column SC by the second bolts B200 and the nuts N, respectively. The second bolt B200 comprises a head B210 and a body B220.

The head B210 is caught in the second insert nut N20 and the body B220 forms a thread to be screwed onto the nut N. [ The body B220 passes through a hole formed in the steering column SC and is screwed to the nut N. [

As shown in FIGS. 7 and 8, the reinforcing rib 220 connects the body 210 to the cowl crossbar 100 around the second insert nut N20. Therefore, the column bracket portion 200B has a higher rigidity that resists external force than a conventional bracket having a structure in which the plate member is bent.

The body B220 of the second bolt B200 may include a cylindrical body B221 and a separating body B222. Although only the second bolt B200 is shown in Figs. 9 to 11, the body B120 of the first bolt B100 may have the same structure.

As shown in Figs. 9 to 11, the cylindrical body B221 has a configuration of forming an outer surface of a constant radius and extends from the head B210. In the case of the second bolt B200, the boundary between the cylindrical body B221 and the separating body B222 may be located at a portion where the nut N is screwed. In the case of the first bolt B100, the boundary between the cylindrical body B221 and the separated body B222 may be located at a portion where the first insert nut N10 is screwed.

The separating bodies B222 are configured to extend in the direction away from each other by the fitting members T, and are provided in plural and extend from the cylindrical body B221, respectively. A plurality of spacing bodies B222 are formed along the circumferential direction of the cylindrical body B221.

As shown in FIG. 10, an insertion space S into which the fitting member T is inserted is formed between the plurality of spacing bodies B222. The insertion space S forms a cylindrical space having a certain radius along the longitudinal direction of the body B220 between the plurality of spacing bodies B222. On the inner surface of the separated body B222, a plurality of grooves G forming a height in the longitudinal direction of the spacing body B222 are formed.

9 to 11, the shim member T is configured to widen a plurality of spaced bodies B222 in a direction away from each other, and includes an insertion portion T1 and an annular engagement portion T2 .

As shown in Figs. 10 and 11, the insertion portion T1 is configured to be slid into the insertion space S, and is formed into a cylindrical shape having a radius equal to or smaller than the radius of the insertion space S.

The annular engaging portion T2 is inserted into the groove G and is formed in an annular shape protruding along the circumferential direction on the outer surface of the insertion portion T1. The annular engaging portion T2 forms a maximum radius larger than the maximum radius of the groove G. [

9, the cylindrical body B221 and the spaced-apart body B222 form an outer surface of the same radius until the fitting member T is inserted into the insertion space S. That is, the cylindrical body B221 and the spaced-apart body B222 have a structure in which the nut N and various insert nuts are simply screwed or untwisted until the insertion member T is inserted into the insertion space S .

11, when the insertion member T is inserted into the insertion space S, the insertion portion T1 moves along the longitudinal direction of the body B220 passing between the grooves G, The portion T2 is inserted into the groove G and the plurality of spacers B222 are pushed away from each other.

Therefore, when the annular engagement portion T2 is inserted into the groove G, the outer diameter of the separated body B222, to which the nut N is screwed, is increased while the plurality of spaced bodies B222 are pushed away from each other, The loosening of the nut N due to the vibration or impact of the vehicle is firmly prevented.

10 and 11, an insertion groove H is formed in the cylindrical body B221, and a tip portion T1 'inserted into the insertion groove H is formed in the insertion portion T1. The insertion portion T1 is formed with a coupling groove Th to which the operation rod R is screwed.

The operating rod R has a structure in which the fitting member T is inserted into or removed from the insertion space S, and one end portion thereof is formed with threads threadedly engaged with the coupling groove Th, and the other end portion is formed with pincers, And an operating portion R 'which is caught by the operating portion R'. When an external force is applied to the operating rod R, the fitting member T is inserted or released into the insertion space S depending on the direction of the external force.

10, the operator inserts the nut N into the body B220 and then inserts the insertion portion T1 into the insertion space S by holding the operation rod R. As shown in Fig. The operator can strike the operating portion R 'with a hammer or the like to allow the annular engaging portion T2 to pass through the plurality of grooves G. [

As shown in Fig. 11, when the leading end portion T1 'is inserted into the insertion groove H, the insertion of the insertion member T is completed. Then, the operator rotates the operation unit R 'with a pliers or the like to separate the operation rod R from the insertion unit T1. The annular engaging portion T2 firmly holds the inserted state in the groove G by the resilience of the plurality of spaced bodies B222 pushed in the direction away from each other.

When it is necessary to detach the nut N from the body B220 as in the maintenance, the operator holds the operation portion R 'by a pliers or the like and rotates the operation rod R to screw it back to the insertion portion T1. Then, the operator grips the operating portion R 'with a pliers or the like and pulls the fitting portion T out of the insertion space S.

At this time, the annular engaging portion T2 is pulled out through the plurality of grooves G by the force of holding the operation portion R 'by a pliers or the like. The plurality of separating bodies B222 are restored to their original state by the elastic restoring force and the nuts N are easily separated from the separating body B222.

Operation rods (R) are only paid to authorized workers (production lines, designated garages, etc.) and workers. Therefore, the unauthorized operator and mechanic can not separate the nut N from the body B220 because the operation rod R is not provided.

According to the present invention, a plurality of first insert nuts are coupled to the dash panel and a first bolt are coupled to the upper bracket, and a plurality of second insert nuts are coupled to the column bracket to be coupled to the steering column and the second bolt , The cow crossbar and the bracket are integrally manufactured by plastic injection and have a plastic injection unified molding structure in which a bolt fastening structure simple and rigid with the vehicle body and the steering column is formed so as to prevent loosening of the bolt fastening structure by vehicle vibration You will be able to provide cowl cross members.

In addition, the reinforcing ribs connect the upper crossover plate, the lower crossover plate and the connecting cross plate between the upper cross plate and the lower cross plate, while the reinforcing ribs connect the cow crossbar and the body to form a rigid rib structure in the cow crossbar and bracket It becomes possible to provide a cow cross member having a plastic injection-molded forming structure which is formed so as to have sufficient strength.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

10: Cowl Cross member
100: cowl crossbar 110: upper cross plate
120: lower cross plate 130: connecting cross plate
140: reinforcing rib 150: side bracket
141: hub 151: guide pin
142: connecting rib 152: jig hole
143: upper rib 100A: first cowl crossbar
144: lower rib 100B: second cowl crossbar
200: Middle bracket
210: body 220: reinforced rib
200A: upper bracket part 200B: column bracket part
N10: First insert nut N20: Second insert nut
N11: 1-1 insert nut B200: second bolt
N12: 1-2 insert nut B210: head
N13: 1-3 insert nut B220: body
B100: first bolt B221: cylindrical body
T: snap member B222: separating body
T1: Insertion part H: Insertion groove
T1 ': leading edge S: insertion space
Th: Coupling groove G: Groove
T2: annular engaging portion
R: Operation rod
R ': Operation unit
SC: steering column

Claims (4)

An upper bracket coupled to the dash panel, and a middle bracket forming a column bracket coupled to the steering column; And a pair of cowl crossbars extending opposite to each other from the middle brackets and each being fastened to both side panels of the vehicle body through side brackets,
Wherein the cowl crossbar and the middle bracket are integrally formed by plastic injection molding,
A plurality of first insert nuts are coupled to the upper bracket so as to be coupled with the dash panel and the first bolt,
A plurality of second insert nuts are coupled to the column bracket to be coupled with the steering column and the second bolt,
The middle bracket
A body to which the first insert nut and the second insert nut are coupled; And a reinforcing rib connecting the body with the cowl crossbar,
Wherein the second bolt includes a head engaged with the second insert nut and a threaded body screwed into the second insert nut,
The body,
A cylindrical body extending from the head; And a plurality of spaced bodies each extending from the cylindrical body and formed along a circumferential direction of the cylindrical body,
Wherein a plurality of spaced apart bodies are formed between the plurality of spaced apart bodies, and the plurality of spaced apart bodies are spaced away from each other by the fitting members. The method according to claim 1,
Wherein a plurality of grooves are formed on an inner surface of the detachable body to form a height in a longitudinal direction of the detachable body,
The shim member
An insertion part inserted into the insertion space; And
And an annular engaging portion formed on an outer surface of the inserting portion and inserted into the groove to push the plurality of spacers in directions away from each other. 3. The method of claim 2,
An insertion groove is formed in the cylindrical body,
Wherein the insertion portion is formed with a leading end portion to be inserted into the insertion groove. The method of claim 3,
Wherein the insertion portion is formed with a coupling groove into which a control rod is screwed,
Wherein when the operating rod is applied with an external force, the fitting member is inserted into or detached from the insertion space depending on the direction of the external force.

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