WO2020040429A1 - Shock absorbent safety bar having reinforcement creases, for vehicle door - Google Patents

Abstract

The present invention relates to a shock absorbent safety bar for a vehicle door and, more specifically, to a shock absorbent safety bar, for a vehicle door, having reinforcement creases. To this end, the shock absorbent safety bar for a vehicle door, of which one side of the cross section is open, includes on at least a part of the outer surface thereof: a first outward crease part (120) in which consecutive protrusions outwardly protrude along the longitudinal direction of the safety bar; or a first inward crease part (140) in which consecutive protrusions inwardly protrude along the longitudinal direction of the safety bar.

Description

Safety bar for shock absorption of automobile doors with reinforcement wrinkles

The present invention relates to a shock absorbing safety bar of an automobile door, and more particularly, to a shock absorbing safety bar of a vehicle door in which a reinforcing wrinkle is formed.

In general, a shock absorbing safety bar (or impact beam, impact bar) is built in a door of an automobile to absorb a shock caused by a vehicle collision. The safety bar bends when a shock is applied, absorbing impact energy and protecting the occupant.

1 is a partial perspective view schematically showing a conventional shock absorbing safety bar for a car door. As shown in FIG. 1, the safety bar 20 is inclined in the interior of the door 10, and both ends of the safety bar 20 are welded to the door 10 by the first and second supports 12 and 14. It is firmly fixed with a back.

The shape of the conventional safety bar as shown in Figure 1 used to simply cut the circular tube, attached to the side of the door. For this reason, the processing is easy, but the safety bar is heavy and there is a problem that the fuel economy of the vehicle is lowered. Therefore, in order to solve such a conventional problem, the need for research on the safety bar that can protect the occupants of the vehicle is made light and shock energy is efficiently absorbed.

Accordingly, the present invention has been made to solve the above problems, the problem to be solved of the present invention is to provide a safety bar for shock absorption of the automobile door is formed a reinforcement wrinkles that can be made light and shock absorption efficiently. .

It is still another object of the present invention to provide a safety bar for shock absorption of an automobile door in which a reinforcing wrinkle is formed, which is easy to process for mass production and removes unnecessary parts.

However, technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those skilled in the art from the following description. It can be understood.

As a means for achieving the above technical problem, in the first embodiment, in the shock absorbing safety bar of the automobile door with one side of the cross section is open, at least a part of the outer surface of the safety bar, along the longitudinal direction of the safety bar The first outward wrinkle portion 120 is a continuous projection protrudes outward; Provides a safety bar for shock absorption of the automobile door is formed, characterized in that the reinforcement wrinkles are formed.

The plurality of first outward wrinkles 120 may be distributed on the cross section (two to eight).

On the other hand, the second outward wrinkle portion 130 to form a continuous projection in the perpendicular direction of the longitudinal direction; is preferably formed further.

As a means for achieving the above technical problem, in the second embodiment, in the shock absorbing safety bar of the vehicle door with one side of the cross-section open, at least a portion of the outer surface of the safety bar, along the longitudinal direction of the safety bar There is provided a safety bar for shock absorption of a car door having a reinforcing wrinkle formed therein; a first inward wrinkle portion 140 having a continuous protrusion projecting inwardly.

On the other hand, it is preferable that a plurality (two to eight) of the first inward wrinkle portion 140 is distributed on the cross section.

On the other hand, it is more preferable that the second inward wrinkle portion 150 to form a continuous projection in the perpendicular direction of the longitudinal direction.

On the other hand, the cross section of the safety bar, a pair of impact resistance portion 104 to form a linear shape; And a shock transmitting part 102 connecting the pair of shock resistance parts 104, and the shock transmitting part 102 is preferably an arc or a straight line.

On the other hand, the impact transmission unit 102 at both ends of the safety bar is formed with a first cutout 160 and a second cutout 165 to reduce the weight.

On the other hand, the impact resistance portion 104 at both ends of the safety bar is formed with a third cutout 170 and the fourth cutout 175 for weight reduction.

On the other hand, the impact resistance portion 104 is fixed to the door by the welding portion (110).

According to one embodiment of the present invention, the safety bar is light in weight and is effective for improving fuel efficiency of the vehicle.

In addition, when shock is applied due to the side impact, shock absorption is efficiently performed to protect the passenger or the passenger.

In addition, there is also an economical ability to lower the manufacturing cost since it is possible to mass-produce through the press working.

However, the effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the spirit of the present invention. It should not be construed as limited to.

1 is a partial perspective view schematically showing a conventional shock absorbing safety bar for a car door;

Figure 2a is a perspective view of the shock absorbing safety bar of the automobile door is formed a reinforcing wrinkles according to the first embodiment of the present invention,

Figure 2b is a cross-sectional view of the safety bar A-A 'direction shown in Figure 2a,

Figure 2c is a first cross-sectional modification of the cross-sectional view shown in Figure 2b,

2D is a second cross-sectional modification of the cross-sectional view shown in FIG. 2B,

3A is a perspective view of a shock absorbing safety bar of a car door in which reinforcing wrinkles are formed according to a second embodiment of the present invention;

Figure 3b is a cross-sectional view of the safety bar B-B 'shown in Figure 3a,

3C is a first cross-sectional modification of the cross-sectional view shown in FIG. 3B,

3D is a second cross-sectional modification of the cross-sectional view shown in FIG. 3B,

4 is a perspective view of a shock absorbing safety bar of a car door in which a reinforcing wrinkle is formed according to a third embodiment of the present invention;

5 is a perspective view of a shock absorbing safety bar of an automobile door in which a reinforcing wrinkle is formed according to a fourth embodiment of the present invention;

6 is a perspective view of a shock absorbing safety bar of a vehicle door in which reinforcing wrinkles are formed according to a fifth embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments may be variously modified and may have various forms, the scope of the present invention should be understood to include equivalents for realizing the technical idea. In addition, the objects or effects presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereby.

The meaning of the terms described in the present invention will be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is said to be "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "include" or "have" refer to features, numbers, steps, operations, components, parts, or parts thereof described. It is to be understood that the combination is intended to be present and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, actions, components, parts or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present invention.

First embodiment

Hereinafter, the configuration of the first embodiment will be described in detail with reference to the accompanying drawings. 2A is a perspective view of a shock absorbing safety bar of an automobile door in which a reinforcing wrinkle is formed according to a first embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along the line AA ′ of the safety bar shown in FIG. 2A.

As shown in Figs. 2A and 2B, the cross section of the safety bar 100a is a steel plate having a thickness of 2 mm, and has a "∩" shape. The safety bar (100a) is a length member, the first support 200 is assembled at one end, the second support 220 is assembled at the other end. Between the safety bar (100a) and the first and second support (200, 220) is firmly fixed by the welding portion (110).

As shown in Figure 2b, the cross section of the safety bar (100a) is composed of a pair of spaced apart impact resistance section 104 and the impact transmission section 102 connecting between the impact resistance section 104. The impact transmitting unit 102 has a circular arc shape having a diameter of a spaced distance between the pair of impact resistance units 104 as a portion to which a direct external impact is applied. The shock transmitting unit 102 functions to absorb some of the external shocks by itself and transmit the rest to the shock resistance unit 104.

The cross section of the safety bar according to the present invention uses a "∩" shape of one side (that is, the bottom) is open, which is the first, second outward wrinkles (120, 130) or the first, second inward wrinkles described later This is to facilitate the (press) processing of (140, 150).

The first outward fold portion 120 is formed in the remaining region except for the region in contact with the first and second supports 200 and 220 of the entire length of the safety bar (100a). In the cross-sectional view as shown in FIG. 2B, four first outward wrinkle parts 120 are formed at equal intervals in the pair of impact resistance parts 104 and two in the shock transmission part 102. The first outward wrinkle portion 120 is named with an outward direction in which it projects from the inside to the outside based on the cross section as shown in FIG. 2B. The first outward wrinkle portion 120 may be formed in the range of 2 to 8 based on the cross section of FIG. 2B, and more outward wrinkles may be formed when adjusting the protrusion size. The first outward wrinkle portion 120 may be molded through a stepped press process, causing a work hardening phenomenon on the safety bar (100a) to increase the bending stress (bending stress rises to 750-> 1,200) have.

In particular, one of the first outward wrinkle portion 120 may be molded at the connection portion between the impact transmitting portion 102 and the impact resistance portion 104 in the cross section, and a plurality of the first outward wrinkle portion 120 may be formed at appropriate intervals or equidistant intervals in the remaining cross-sectional area. .

The second outward wrinkle portion 130 is formed in the form of a continuous protrusion along the perpendicular direction of the longitudinal direction of the safety bar (100a). Three second outward wrinkles 130 are formed at equal intervals in the same perspective view as in FIG. 2A. The second outward wrinkle portion 130 can also form more outward wrinkles when adjusting the protrusion size or spacing. The second outward wrinkle portion 130 may be molded through a stepped press process, thereby causing a work hardening phenomenon to the safety bar (100a) to increase the bending stress or induce bending.

FIG. 2C is a first cross-sectional modification of the cross-sectional view shown in FIG. 2B. As shown in FIG. 2C, the impact transmitting unit 102 is a portion to which a direct external impact is applied, a circular arc shape or a part of an ellipse having a diameter greater than a distance between the pair of impact resistance units 104. Equipped with.

FIG. 2D is a second cross-sectional modification of the cross-sectional view shown in FIG. 2B. As shown in FIG. 2D, the impact transmitting unit 102 has a shape in which a pair of impact resistance units 104 is connected in a straight line as a portion to which a direct external impact is applied.

2B, 2C, and 2D illustrate various cross-sectional variants, but those skilled in the art will recognize that various modifications are possible and should be construed as being within the scope of the present invention.

Second embodiment

Hereinafter, the configuration of the second embodiment will be described in detail with reference to the accompanying drawings. 3A is a perspective view of a safety bar for absorbing shock of an automobile door in which a reinforcing wrinkle is formed according to a second embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along the line B-B 'of the safety bar shown in FIG. 3A.

As shown in Figs. 3A and 3B, the cross section of the safety bar 100d is a steel plate having a thickness of 2 mm, and has a "∩" shape. The safety bar (100d) is a length member, one end of the first support 200 is assembled, the other end of the second support 220 is assembled. Between the safety bar (100d) and the first and second support (200, 220) is firmly fixed by the welding portion (110).

As shown in Figure 3b, the cross section of the safety bar (100d) is composed of a pair of spaced apart impact resistance section 104 and the impact transmission section 102 connecting between the impact resistance section 104. The impact transmitting unit 102 has a circular arc shape having a diameter of a spaced distance between the pair of impact resistance units 104 as a portion to which a direct external impact is applied. The shock transmitting unit 102 functions to absorb some of the external shocks by itself and transmit the rest to the shock resistance unit 104.

The first inward wrinkle portion 140 is formed in the remaining area except for the area in contact with the first and second support (200, 220) of the overall length of the safety bar (100d). In the cross-sectional view as shown in FIG. 3B, four first inward wrinkle parts 140 are formed at equal intervals in the pair of impact resistance parts 104 and two in the shock transmission part 102. The first inward wrinkle portion 140 is named with the inward direction to project from the outside to the inside based on the cross section as shown in FIG. 3b. The first inward wrinkle portion 140 may be formed in the range of 2 to 8 based on the cross section of FIG. 3B, and more inward wrinkles may be formed when adjusting the protrusion size. The first inward wrinkle portion 140 may be molded through a stepped press process, thereby causing a work hardening phenomenon on the safety bar (100d) to increase the bending stress.

In particular, one of the first inward wrinkle portion 140 may be molded at the connection portion between the impact transfer unit 102 and the impact resistance unit 104 in the cross section, and a plurality of the inward cross sections may be formed at appropriate intervals or at equal intervals. .

The second inward wrinkle portion 150 is formed in the form of a continuous protrusion along the perpendicular direction of the longitudinal direction of the safety bar (100d). Three second inward wrinkles 150 are formed at equal intervals in the same perspective as FIG. 3A. The second inward wrinkle portion 150 can also be formed more inward wrinkles when adjusting the protrusion size or spacing. The second inward wrinkle portion 150 can be molded through a step press working, it causes the work hardening phenomenon on the safety bar (100d) has the effect of increasing the bending stress or inducing bending.

3C is a first cross-sectional modification of the cross-sectional view shown in FIG. 3B. As shown in FIG. 3C, the impact transmitting part 102 is a portion to which a direct external impact is applied, a circular arc shape or a part of an ellipse having a diameter greater than a spaced distance between the pair of impact resistance parts 104. Equipped with.

3D is a second cross-sectional modification of the cross-sectional view shown in FIG. 3B. As shown in FIG. 3D, the impact transmitting unit 102 has a shape in which a pair of impact resistance units 104 is connected in a straight line as a portion to which a direct external impact is applied.

3B, 3C, and 3D illustrate various cross-sectional variants, but those skilled in the art will recognize that various modifications are possible and should be construed as being within the scope of the present invention.

Third embodiment

Hereinafter, the configuration of the third embodiment will be described in detail with reference to the accompanying drawings. 4 is a perspective view of a shock absorbing safety bar of a vehicle door in which reinforcing wrinkles are formed according to a third embodiment of the present invention. As shown in FIG. 4, the configuration of the first and second outward wrinkle parts 120 and 130 of the safety bar 100g is the same as that of the first embodiment.

The first and second cutouts 160 and 165 are formed in the impact transmitting part 102 at both ends of the safety bar 100g. The first cutout 160 is formed by removing 1/6 to 1/3 of the entire length of the safety bar 100g through cutting or laser cutting. The second cutout 165 is designed to be symmetrical with the first cutout 160 and processed. Due to the first and second cutouts 160 and 165, the total weight of the safety bar 100g is reduced in the range of 15% to 20%. In the overall length of the safety bar (100g), the external shock is frequently applied to the central part, and both ends of the safety bar have a role of resisting the shock applied to the central part, rather than a direct external shock. Therefore, by forming the first and second cutouts 160 and 165, the weight can be reduced without lowering the bending strength.

Fourth embodiment

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the preferred embodiment. 5 is a perspective view of a shock absorbing safety bar of a vehicle door in which reinforcing wrinkles are formed according to a fourth embodiment of the present invention. As shown in FIG. 5, the configuration of the first and second inward wrinkle parts 140 and 150 of the safety bar 100h is the same as that of the second embodiment. In addition, the configuration and function of the first and second cutouts 160 and 165 are the same as those of the above-described third embodiment.

Fifth Embodiment

Hereinafter, the configuration of the fifth embodiment will be described in detail with reference to the accompanying drawings. 6 is a perspective view of a shock absorbing safety bar of a vehicle door in which reinforcing wrinkles are formed according to a fifth embodiment of the present invention. As shown in FIG. 6, the third and second cutouts 170 and 175 are formed in the impact resistance part 104 at both ends of the safety bar 100i to reduce the weight. The third cutout 170 is formed by removing 1/6 to 1/3 of the entire length of the safety bar 100i through cutting or (laser) cutting. The fourth cutout 175 is designed and processed to be symmetrical with the third cutout 170. Due to the third and fourth cutouts 170 and 175, the total weight of the safety bar 100i is reduced in the range of 15% to 20%. In the overall length of the safety bar (100i), the external shock is applied to the location of the center is frequently frequent, both ends are the main function to resist the impact applied to the center portion rather than a direct external impact. Therefore, by forming the third and fourth cutouts 170 and 175, the weight can be reduced without lowering the bending strength.

In order for the third and fourth cutouts 170 and 175 to be assembled with the first and second supports 200 and 220, respectively, the first and second supports 200 and 220 may be formed by the third and fourth cutouts 170 and 175. Manufactured to fit the inclined surface. On the outer surface of the safety bar 100i shown in FIG. 6, first and second outward wrinkle parts 120 and 130 as shown in FIG. 2A may be formed, and first and second inward wrinkle parts 140 and 150 as shown in FIG. 3A. ) May be formed.

Modification Example

As a modified embodiment of the present invention, the first and second outward wrinkle parts 120 and 130 as shown in FIG. 2A and the first and second inward wrinkle parts 140 and 150 as shown in FIG. You can also mix and manufacture.

Further, the first and second outward wrinkles 120 and 130 and / or the first and second inward wrinkles 140 and 150 may be formed, and the first and second incisions 160 and 165 and the third and fourth incisions may be formed. After processing the parts 170 and 175, the strength may be increased by about 2.5 times or more through a heat treatment operation such as quenching.

The detailed description of the preferred embodiments of the invention disclosed as described above is provided to enable those skilled in the art to implement and practice the invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that various modifications and changes can be made without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above embodiments in a manner that combines with each other. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The invention can be embodied in other specific forms without departing from the spirit and essential features of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, the claims may be combined to form embodiments by combining claims that do not have an explicit citation relationship or may be incorporated as new claims by post-application correction.

Claims (10)

In the safety bar for shock absorption of the car door that is open on one side of the cross section, At least a portion of the outer surface of the safety bar, the first outward wrinkle portion 120 is formed with a continuous projection protruding outward in the longitudinal direction of the safety bar; is formed, the impact of the reinforcement wrinkles formed car door, characterized in that Absorption safety bar. Safety bar for shock absorption of the car door formed with reinforcing wrinkles. The method of claim 1, The first outward wrinkle portion 120 is a shock absorbing safety bar of the automobile door is formed, characterized in that the plurality of reinforcing wrinkles are distributed on the cross-section. The method of claim 1, The second outward wrinkle portion 130 to form a continuous projection in the perpendicular direction of the longitudinal direction; Safety bar for shock absorption of the reinforcement wrinkles formed car door, characterized in that is further formed. In the safety bar for shock absorption of the car door that is open on one side of the cross section, At least a portion of the outer surface of the safety bar, the first inward wrinkle portion 140 is formed with a continuous projection protruding inwardly along the longitudinal direction of the safety bar; is formed, the impact of the reinforcement wrinkles formed car door Absorption safety bar. The method of claim 4, wherein The first inward wrinkle portion 140 is a shock absorbing safety bar of the automobile door is formed with a reinforcing wrinkles, characterized in that the plurality is distributed on the cross-section. The method of claim 4, wherein The second inward wrinkle portion 150 to form a continuous projection in the perpendicular direction of the longitudinal direction; Shock absorbing safety bar of the vehicle door is characterized in that the reinforcement wrinkles are further formed. The method according to claim 1 or 4, The cross section, A pair of impact resistance units 104 forming a linear shape; And Consists of; shock transmission unit 102 for connecting the pair of impact resistance unit 104, The impact transmission unit 102 is a shock absorbing safety bar of the automobile door formed with reinforcing wrinkles, characterized in that the arc or a straight line. The method of claim 7, wherein The impact transmission unit 102 at both ends of the safety bar, the impact of the reinforcement wrinkles formed car door, characterized in that the first cutout 160 and the second cutout 165 is formed to reduce the weight Absorption safety bar. The method of claim 7, wherein The impact resistance unit 104 at both ends of the safety bar, the impact of the reinforcement wrinkles formed car door, characterized in that the third cutout 170 and the fourth cutout 175 is formed to reduce the weight Absorption safety bar. The method according to any one of claims 7 to 9, The impact resistance part 104 is a safety bar for shock absorption of the automobile door is formed with a reinforcing wrinkles, characterized in that fixed to the door by the welding portion (110).

Images