JP2014162350A - Fitting structure of column shaft of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make further advancement of steering support rigidity without the need to take a plank countermeasure of a column blacket to a limit of press molding.SOLUTION: In the case of mounting a column shaft 4 with a steering shaft 7 inserted so as to be rotatable by steering to a steering member 2 via a column bracket 1, the column bracket 1 is constituted of a rear side column bracket piece 11 that mounts the column shaft 4 by extending the steering member 2 on a rear side of the car body in a gripping condition and a front side column bracket piece 12 that mounts the column shaft 4 by extending on a front side of the steering member 2; and the rear side column bracket piece 11 and the front side column bracket piece 12 are integrally constituted by weld-jointing a joint piece 11a extensionally provided integrally with the rear side column bracket piece 11 to the front side column bracket piece 12.

Description

  The present invention relates to a column shaft mounting structure in which a column shaft into which a steering shaft in an automobile is inserted so as to be capable of steering rotation is attached to a steering member.

  As a conventional column shaft mounting structure for this type of automobile, for example, the techniques shown in FIGS. 5 and 6 are known. According to FIGS. 5 and 6, the steering member b is disposed on the vehicle body (not shown) via the side brackets a and a on the side in the vehicle width direction of the vehicle body (not shown). In addition to a pair of audio brackets c and c, an instrument stay d, and the like, a column bracket e is attached, and the column shaft e is inserted into the steering shaft k so as to be capable of steering rotation. It is configured to mount f.

  The column bracket e extends to the rear side of the vehicle body while holding the steering member b, and extends to the front side of the vehicle body of the steering member b, and a rear side column bracket piece h for mounting the column shaft f by a stud bolt g or the like. Thus, the front side column bracket piece j on which the column shaft f is mounted by the stud bolt i or the like is configured as a separate structure (see Patent Document 1).

  By the way, this type of vehicle column shaft mounting structure is provided with a steering shaft (not shown) via a steering shaft k inserted into the column shaft f so as to be capable of steering rotation when the vehicle body is deformed in the event of an automobile collision accident or the like. In order to prevent the wheel from moving in the direction of the driver and preventing the driver from escaping from the passenger compartment, shock absorption performance is required to prevent the steering wheel itself from moving toward the driver. ing.

  On the other hand, this type of vehicle column shaft mounting structure propagates to the steering shaft k inserted through the tire (not shown) through the column shaft f so as to be capable of steering rotation due to unevenness on the road when the vehicle is running. In order to prevent the vibration force from being propagated to the occupant, the mounting structure of the column shaft f needs to be configured with a predetermined steering support rigidity performance (vibration absorption characteristics).

  Therefore, among the performances required for the conventional column shaft mounting structure of an automobile, the former shock absorbing performance is, for example, that the column bracket e is further attached to the vehicle body via a post bracket (not shown), and the post bracket is The steering wheel is configured not to move to the driver side by absorbing an impact at the time of collision by having a bellows structure or the like.

  Further, with respect to the latter steering support rigidity, the conventional column shaft mounting structure of an automobile, for example, press-molds a rear side column bracket piece h and a front side column bracket piece j as shown in FIG. As a result, the column bracket e is configured by being integrally formed, and a pair of column brackets e having such a configuration is arranged in a state of being separated from each other in the vehicle width direction with respect to the steering member b (Patent Document 2). reference).

  Further, the conventional column shaft mounting structure shown in FIG. 8 is configured to have a pair of column brackets e and e, for example, in the same manner as the conventional technique shown in FIG. Also, the two column brackets e, e are configured by integrally molding them by connecting the rear side column bracket pieces h, h to each other (see Patent Document 3).

  For this reason, in the former column shaft mounting structure shown in FIG. 7, the rear column bracket piece h and the front column bracket piece j are integrally configured to enhance the steering support rigidity. In the latter case shown in FIG. 8, the above-mentioned steering bracket rigidity is enhanced by connecting the rear side column bracket pieces h, h of the column brackets e, e together. It is intended to become.

Japanese Patent Laid-Open No. 2005-112078 JP-A-10-129501 JP 2010-215186 A

  However, in recent automobile column shaft mounting structures, the steering support rigidity is required to be further enhanced from the standpoint of further steering stability, etc. From this point of view, the thickness of the column bracket e is usually thicker. The shape is used to achieve higher steering support rigidity.

  As a result, the measure against the thick plate of the column bracket e not only results in an increase in the weight of the vehicle body, but generally, when the column bracket e having the above-described integrated structure is formed by press molding or the like, Considering the point that the formable plate thickness in press molding is 3.2 mm or less, it must be said that there is a limit to the enhancement of the steering support rigidity. Therefore, the column shaft mounting structure of an automobile is accompanied by considerable difficulty depending on the above-mentioned measures against the thick plate in response to the demand for higher steering support rigidity.

  Therefore, in view of the problems to be solved in the prior art, the present invention is a column bracket mounting structure for an automobile in which the steering support rigidity is further improved without taking measures for thick plates of the column bracket to the limit of press molding. The purpose is to provide.

  A column shaft mounting structure according to the present invention is a column shaft mounting structure for an automobile in which a column shaft into which a steering shaft is inserted so as to be capable of steering rotation is mounted to a steering member via a column bracket. A rear-side column bracket piece that extends to the rear side of the vehicle body with the steering member held and mounts the column shaft; and a front side that extends to the front side of the vehicle body of the steering member and mounts the column shaft. It is composed of a column bracket piece, and it is constructed integrally by joining a joining piece extending integrally from either one of the rear side column bracket piece and the front side column bracket piece to the other by welding. It is characterized by that.

  In the present invention having such a configuration, the column bracket is composed of a rear side column bracket piece and a front side column bracket piece which are separate from each other. Can be made easier.

  At the same time, the rear side column bracket piece and the front side column bracket piece are integrally formed by joining a joining piece integrally formed on one side to the other side by welding. The rigidity can be improved.

  As a result, the present invention receives the vibration from the tire to the column shaft which is propagated through the steering shaft due to unevenness on the road when the automobile is running, etc., by the column bracket having a high rigidity configuration. As a result, the steering support rigidity can be improved without taking measures for thick plates of other components to the limit of press molding.

  Further, according to one embodiment of the present invention, the joining piece extends integrally with the rear column bracket piece.

  With this configuration, according to the present invention, an integrally configured column bracket is configured by joining a joint piece extending integrally with the rear side column bracket piece to the front side column bracket piece by welding. In addition to facilitating press molding and the like, it is possible to increase the steering support rigidity without taking measures for thick plates of column brackets and other components up to the limit of press molding.

  Further, according to one embodiment of the present invention, the joining piece extends integrally with the front side column bracket piece.

  With this configuration, according to the present invention, an integrally configured column bracket is configured by joining a joint piece integrally extending to the front side column bracket piece to the rear side column bracket piece by welding. In addition to facilitating press molding and the like, it is possible to increase the steering support rigidity without taking measures for thick plates of column brackets and other components up to the limit of press molding.

  According to another embodiment of the present invention, a pair of the column brackets are disposed in a state of being separated from each other in the vehicle width direction with respect to the steering member.

  With this configuration, the present invention further improves the steering support rigidity because the column shaft is attached to the steering member by disposing and installing the pair of column brackets in the vehicle width direction. Can be made.

  As another embodiment of the present invention, the pair of column brackets are integrally connected by welding to each other via a mounting plate piece.

With this configuration, the present invention forms a rear side column bracket piece and a front side column bracket piece on one side by integrally connecting a pair of column brackets by welding via a mounting plate piece. Combined with the fact that the joining piece is integrally formed by welding to the other, it is possible to further enhance the steering support rigidity while maintaining the ease of press molding and the like.

  In the present invention, the column bracket is constituted by the rear side column bracket piece and the front side column bracket piece which are separately configured, so that even if the plate bracket is thickened to some extent, the molding shape is simplified and press molding is facilitated. Yes.

  With this invention, the rear side column bracket piece and the front side column bracket piece are integrally configured by welding a joining piece integrally formed on either side to the other by welding, The rigidity of the column bracket itself can be improved.

  As a result, the present invention receives the vibration from the tire to the column shaft which is propagated through the steering shaft due to unevenness on the road when the automobile is running, etc., by the column bracket having a high rigidity configuration. As a result, the steering support rigidity can be improved without taking measures for thick plates of other components to the limit of press molding.

1 is a side configuration diagram schematically illustrating a column shaft mounting structure according to a first embodiment of the present invention. FIG. FIG. 2 is an enlarged perspective view illustrating a relationship between a steering member and a column bracket in FIG. 1. It is the perspective view which expanded and drawn the column bracket in FIG. It is the perspective view which expanded and drawn the column bracket which comprises the column shaft attachment structure concerning 2nd Example of this invention. It is the schematic block diagram which drawn the column shaft attachment structure concerning the prior art. FIG. 6 is a side configuration diagram schematically illustrating an enlarged relationship between a steering member and a column bracket in FIG. 5. FIG. 7 is an enlarged perspective view illustrating an example of a relationship between a steering member and a column bracket constituting the column shaft mounting structure depicted in FIG. 6. FIG. 7 is an enlarged perspective view of another example of the relationship between the steering member and the column bracket constituting the column shaft mounting structure depicted in FIG. 6.

  The column shaft mounting structure according to the embodiment of the present invention is configured so as to further enhance the steering support rigidity without taking measures for the thick plate of the column bracket to the limit of press forming.

  Next, a column shaft mounting structure for an automobile according to an embodiment adopting the present invention will be described with reference to the drawings.

  First, a column shaft mounting structure according to a first embodiment of the present invention will be described with reference to FIGS.

  In such a column shaft mounting structure, as shown in FIG. 1, the column bracket 1 extends to the rear side of the vehicle body while holding the steering member 2, and a rear side column bracket piece 11 for mounting the column shaft 4; A front side column bracket piece 12 that extends to the front side of the vehicle body of the steering member 2 and on which the column shaft 4 is mounted. The rear side column bracket piece 11 is fastened by using the stud bolt 3 or the like to attach the column shaft 4, and the front side column bracket piece 12 is fastened by using the stud bolt 5 or the like. As a result, the column shaft 4 is mounted.

  The rear-side column bracket piece 11 is formed in a U-shaped cross section by press-molding a plate material, and a joining piece 11a extending toward the front-side column bracket piece 12 is integrally extended at the time of the press-forming. ing.

  The front side column bracket piece 12 is also formed in a U-shaped cross section by press molding a plate material.

  The rear side column bracket piece 11 and the front column bracket piece 12 are clearly shown in FIG. 3 by joining the joining piece 11a of the rear side column bracket piece 11 to the outer wall of the front column bracket piece 12 in a superposed state by welding. As shown, the column bracket 1 is integrally formed.

  As shown in FIG. 2, a pair of column brackets 1 configured in this manner are disposed so as to be spaced apart from each other in the vehicle width direction with respect to the steering member 2 so as to support the column shaft 4. It has become.

  Further, as clearly shown in FIG. 3, the pair of column brackets 1 are integrated with each other by joining the mounting plate pieces 6 by welding at the vehicle body rear side end surfaces of the front side column bracket pieces 12. It is connected.

  Note that a steering shaft 7 is inserted into the column shaft 4 so as to be capable of steering rotation.

  According to the first embodiment of the present invention configured as described above, the column bracket 1 is constituted by the rear side column bracket piece 11 and the front side column bracket piece 12 which are separate from each other. Even if the thickness is increased to some extent, the press shape is facilitated because the forming shape is simplified.

  Further, since the rear side column bracket piece 11 and the front side bracket piece 12 are integrally formed by welding through a joining piece 11a integrally formed with the rear side column bracket piece 11, a press is used. The rigidity of the column bracket itself can be improved without increasing the thickness to the limit plate thickness.

  As a result, the vibration to the column shaft 4 propagated from the tire (not shown) through the steering shaft 7 due to unevenness on the road or the like during driving of the automobile is received by the column bracket 1 having a high rigidity configuration. It is possible to increase the steering support rigidity without taking measures for thick plates of the column bracket 1 and other components up to the limit of press molding.

  Furthermore, in the first embodiment, the pair of column brackets 1 are disposed and installed in the vehicle width direction with respect to the steering member 2, and the column shaft 4 is attached. The steering support rigidity can be further enhanced.

  In addition, in the first embodiment, the pair of column brackets 1 are integrally connected by welding via the mounting plate pieces 6, so that the rear side column bracket pieces 11 and the front side column bracket pieces are connected. 12 is coupled to the front side column bracket piece 12 by welding to form a joint piece 11a formed on the rear side column bracket piece 11 by welding, thereby facilitating press molding and the like. However, the steering support rigidity can be further enhanced.

  Next, a second embodiment of the present invention shown in FIG. 4 will be described.

  In the second embodiment of the present invention shown in FIG. 4, as in the first embodiment, the column bracket 1 extends to the rear side of the vehicle body of the steering member and is mounted with a column shaft. The rear side column bracket piece 11 and the front side column bracket piece 12 that extends to the front side of the steering member and attaches the column shaft are separated from each other in the vehicle width direction with respect to the steering member. A common arrangement is that the column shaft is supported by a pair. .

  However, the rear side column bracket piece 11 and the front side column bracket piece 12 constitute a column bracket 1 having an integral structure by welding a joining piece 12a integrally formed with the front side column bracket piece 12. It is different.

  With this configuration, in the second embodiment, the column bracket 1 is constituted by the rear side column bracket piece 11 and the front side column bracket piece 12 which are separate from each other. However, the molding shape is simplified to facilitate press molding.

  Further, since the rear side column bracket piece 11 and the front side bracket piece 12 are integrally joined by welding via a joining piece 12a integrally formed with the front side bracket piece 12, even if press molding is performed. Therefore, the rigidity of the column bracket itself can be improved without increasing the thickness beyond the limit plate thickness.

  As a result, vibrations from the tire (not shown) to the column shaft that are propagated through the steering shaft due to unevenness on the road during driving of the automobile are received by the column bracket 1 having a high rigidity structure. Thus, the steering support rigidity can be improved without taking measures for thick plate of 1 and other components up to the limit of press forming.

  Furthermore, in the second embodiment, the pair of column brackets 1 are disposed and installed in the vehicle width direction with respect to the steering member, and the column shaft is attached. The rigidity can be further enhanced.

  In addition, in the second embodiment, the pair of column brackets 1 are integrally connected by welding via the mounting plate pieces 6, so that the rear side column bracket pieces 11 and the front side column bracket pieces are connected. 12 and the front side column bracket piece 12 are joined integrally to the rear side column bracket piece 11 by welding to maintain the ease of press molding and the like. However, the steering support rigidity can be further enhanced.

  In the present invention as described above, the steering shaft in the automobile is inserted so as to be capable of steering rotation because the steering support rigidity can be further enhanced without taking measures for the thick plate of the column bracket to the limit of press molding. It can be said that this is suitable for a column shaft mounting structure in which the column shaft is attached to the steering member.

1 Column bracket
11 Rear column bracket piece
12 Front side column bracket piece
11a, 12a Joint piece 6 Mounting plate piece 7 Steering shaft

Claims (5)

  A column shaft mounting structure for an automobile, in which a column shaft into which a steering shaft is inserted so as to be capable of steering rotation is attached to a steering member via a column bracket, the column bracket holding the steering member in a vehicle body A rear side column bracket piece that extends rearward and mounts the column shaft, and a front side column bracket piece that extends to the front side of the vehicle body of the steering member and mounts the column shaft, A column shaft for an automobile, which is integrally formed by welding a joining piece integrally extended from either one of the rear side column bracket piece and the front side column bracket piece to the other side by welding. Mounting structure.   2. The column shaft mounting structure for an automobile according to claim 1, wherein the joining piece extends integrally with the rear side column bracket piece. 3.   2. The column shaft mounting structure for an automobile according to claim 1, wherein the joining piece extends integrally with the front side column bracket piece. 3.   4. The steering shaft mounting of an automobile according to claim 1, wherein a pair of the column brackets are disposed and installed in a state separated from each other in the vehicle width direction with respect to the steering member. Construction.   5. The steering shaft mounting structure for an automobile according to claim 4, wherein the pair of column brackets are integrally connected to each other by welding via a mounting plate piece.

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