KR20240015808A - Integrated subframe with boxing guide forming - Google Patents

Abstract

The present invention relates to an integrated subframe with boxing guide forming, and more specifically, to an upper panel; lower panel; and a plurality of guide forming parts formed on the press-fit line of the upper panel or lower panel to avoid collision when press-fitting the upper panel and the lower panel and to guide the boxing. An integrated type with boxing guide forming, characterized in that it includes a. It's about subframes.

Description

Integrated subframe with boxing guide forming}

The present invention relates to an integrated subframe with boxing guide forming.

In general, the subframe of a car is also called a suspension member, and it is coupled to the car body and connects various members that make up the suspension system.

To this subframe, the assist arm and lower arm are connected by eccentric cam bolts to adjust the toe angle and camber angle to ensure the straightness and driving performance of the car wheels.

In other words, a subframe is mounted on the lower part of the vehicle to prevent vibration from being directly transmitted to the vehicle body and to disperse shock in the event of a vehicle collision.

In general, subframes mounted on front-wheel drive or rear-wheel drive vehicles are widely used as an “H” shape (or “I” shape) with a dogbone shape and a “#” shape with a square shape. .

1A and 1B show a perspective view and an exploded perspective view of a conventional #-type rear wheel subframe.

As shown in FIGS. 1A and 1B, it can be seen that the subframe 1 is manufactured by press-fitting, boxing, and welding eight or more panels. That is, the front member 10 and the rear member 30, and a pair of side members 20 between the front member 10 and the rear member 30 are connected, and the front member 10 is connected to the front upper panel ( 11) and the front lower panel (12), the rear member (30) has a rear front panel (31) and a rear rear panel (32), and the side member (20) has a side upper panel (21) and a side lower panel (22). It is manufactured by press-fitting, boxing, and welding.

Therefore, as a welded product made up of 8 or more panels, excessive manufacturing and management costs are incurred due to management of multiple parts (mold and product). Figure 2a shows a photo showing durability cracks in the weld zone, and Figure 2b shows a photo showing corrosion in the weld zone.

As shown in Figure 2a, there is a problem that durability performance is weak due to the influence of welding heat at the member connection part, and as shown in Figure 2b, there is a problem that breakage occurs due to corrosion at the member connection part.

Republic of Korea Patent Publication No. 10-2015-0127382 Republic of Korea Patent No. 10-1833907 Republic of Korea Patent Publication No. 10-2013-0042152 Republic of Korea Patent No. 10-0536003 Republic of Korea Patent Publication No. 10-2013-0016509

Therefore, the present invention was developed to solve the above-mentioned conventional problems, and according to an embodiment of the present invention, the purpose is to provide an integrated rear wheel subframe for welding member connections and reducing the number of parts.

When welding subframes, etc., the 'ㄷ' shaped panel is boxed (press-fitted) upwards and downwards and then the welding process is performed. Due to the spring back or tolerances generated during forming, collisions between the upper and lower panels frequently occur during the boxing process. In addition, in order to solve the problem of changes such as increase in the combined rotation angle (the angle at which the operator rotates and sets the axis at an angle horizontal to the box matching surface) due to the large size of the single product, according to an embodiment of the present invention, a sub By forming at least one guide forming part on each press-fitting surface on the frame, an integrated subframe with boxing guide forming can be avoided and press-fitted into a guide shape during boxing to prevent collision and make boxing quick and easy. It has a purpose.

Meanwhile, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly apparent to those skilled in the art from the description below. It will be understandable.

An object of the present invention is a subframe, an upper panel; lower panel; and a plurality of guide forming parts formed on the press-fit line of the upper panel or lower panel to avoid collision when press-fitting the upper panel and the lower panel and to guide the boxing. An integrated type with boxing guide forming, characterized in that it includes a. This can be achieved as a subframe.

And the subframe is a rear wheel #-type subframe, and each of the upper panel and the lower panel has a U-shaped cross section, a front part, a rear part, and a pair of sides connected between the front part and the rear part. It may be characterized as being composed of an integral part.

Additionally, the press-fit lines of the upper panel and the lower panel may include a front press-fit line, two side press-fit lines, a rear press-fit line, and a center press-fit line.

In addition, the guide forming unit may be characterized as having at least one forming shape protruding outward on one side of each of the front press-fit line, two side press-fit lines, rear press-fit line, and center press-fit line.

In addition, the guide forming unit may guide the boxing while avoiding collisions on the press-fitting line during press-fitting and boxing.

According to the integrated rear wheel subframe according to an embodiment of the present invention, it is possible to weld member connection parts and reduce the number of parts.

According to the integrated rear wheel subframe according to an embodiment of the present invention, when welding the subframe, etc., the 'ㄷ' shaped panel is boxed (press-fitted) up and down and then the welding process is performed, and the effect of spring back or tolerance generated during forming is performed. As a result, collisions between the upper and lower panels frequently occur during the boxing process, and the individual product size is large, causing problems such as an increase in the combined rotation angle (the angle at which the worker rotates and sets the axis at an angle horizontal to the box matching surface). can be solved, and by forming at least one guide forming part for each press-fit surface in the subframe, it can be avoided and press-fitted in a guide shape during boxing, thereby avoiding and preventing collisions during boxing and making boxing quick and easy. has

Meanwhile, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention, so the present invention is limited only to the matters described in such drawings. It should not be interpreted as such.
1A and 1B are a perspective view and an exploded perspective view of a conventional #-type rear wheel subframe;
Figure 2a is a photo showing the occurrence of durability cracks in the weld zone;
Figure 2b is a photo showing corrosion of the weld zone,
Figure 3 is a plan view of the #-type rear wheel subframe and the panel boxing in contact with the two sides on both sides;
Figure 4 is a plan view of the integrated #-type rear wheel subframe and the panel boxing with five sides in contact;
Figure 5a is an exploded perspective view of an integrated #-type rear wheel subframe according to an embodiment of the present invention;
Figure 5b is a perspective view of an integrated #-type rear wheel subframe according to an embodiment of the present invention;
Figure 6a is a plan view of the integrated #-type rear wheel subframe showing the guide frame application section according to an embodiment of the present invention;
Figure 6b is a cross-sectional view of AA;
Figure 7a is a cross-sectional view schematically showing a connection portion when conventional guide forming is not applied and a collision during boxing;
Figure 7b is a cross-sectional view schematically showing the connection portion when applying the guide forming portion according to an embodiment of the present invention, and the avoidance and press fit into the guide forming shape during boxing.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments related to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

In this specification, when an element is referred to as being on another element, it means that it may be formed directly on the other element or that a third element may be interposed between them. Also, in the drawings, the thickness of components is exaggerated for effective explanation of technical content.

Embodiments described herein will be explained with reference to cross-sectional views and/or plan views, which are ideal illustrations of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Therefore, the shape of the illustration may be changed depending on manufacturing technology and/or tolerance. Accordingly, embodiments of the present invention are not limited to the specific form shown, but also include changes in form produced according to the manufacturing process. For example, an area shown as a right angle may be rounded or have a shape with a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a specific shape of the region of the device and are not intended to limit the scope of the invention. In various embodiments of the present specification, terms such as first and second are used to describe various components, but these components should not be limited by these terms. These terms are merely used to distinguish one component from another. Embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for describing embodiments and is not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, 'comprises' and/or 'comprising' does not exclude the presence or addition of one or more other elements.

In describing specific embodiments below, various specific details have been written to explain the invention in more detail and to aid understanding. However, a reader with sufficient knowledge in the field to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that when describing the invention, parts that are commonly known but are not significantly related to the invention are not described in order to prevent confusion without any reason in explaining the invention.

Hereinafter, the configuration and function of the integrated subframe with boxing guide forming according to an embodiment of the present invention will be described.

First, Figure 3 shows a plan view of a #-shaped rear wheel subframe and a panel boxing in contact with two sides on both sides. And Figure 4 shows a plan view of the integrated #-type rear wheel subframe and the panel boxing in contact with the five sides. And Figure 5a shows an exploded perspective view of the integrated # type rear wheel subframe according to an embodiment of the present invention, and Figure 5b shows a perspective view of the integrated # type rear wheel subframe according to an embodiment of the present invention.

When welding the subframe, the welding process is performed after boxing and press-fitting each ‘ㄷ’ shaped panel upwards and downwards.

Collisions between the upper and lower panels frequently occur during the boxing process due to the springback or tolerance generated during the molding process, and also, due to the large size of the individual products, the operator rotates the axis at an angle horizontal to the box matching surface. Problems arise where changes occur, such as increasing the setting angle.

As shown in FIG. 3, in the case of the conventional multi-component # type rear wheel subframe 1, each front member 10, side member 20, and rear member 30 are boxed on two sides of the panel in contact with each other. You can see that this is necessary.

In an embodiment of the present invention, it may be configured as an integrated subframe. As shown in FIGS. 5A and 5B, it can be seen that this integrated subframe is manufactured by combining the respective parts based on the upper panel 40 and the 2pea lower panel 50 as a whole.

That is, the subframe 100 is a rear wheel #-type subframe, and the upper panel 40 and lower panel 50 each have a U-shaped cross section, and the upper panel 40 has a front portion 41 and a rear portion ( 43) and a pair of side parts 42 connected between the front part 41 and the rear part 43 are integrated. The lower panel 50 is also composed of a front part 51, a rear part 53, and a pair of side parts 52 connected between the front part 51 and the rear part 53. .

In the case of this integrated subframe 100, press-fitting and boxing have five press-fitting lines. That is, as shown in FIG. 4, the press-fit lines of the upper panel 40 and the lower panel 50 include the front press-fit line 61, two side press-fit lines 62, the rear press-fit line 63, and the center press-fit line. It has a press-fit line 64, and in the case of such an integrated subframe, it becomes more difficult to press-fit and box the upper panel 40 and lower panel 50.

Figure 6a shows a plan view of the integrated #-type rear wheel subframe showing the guide frame application section according to an embodiment of the present invention. Figure 6b shows a cross-sectional view taken along line A-A.

And Figure 7a shows a cross-sectional view schematically showing a connection portion when conventional guide forming is not applied and a collision during boxing. In addition, Figure 7b shows a cross-sectional view schematically showing the connection part when applying the guide forming part according to an embodiment of the present invention, and the avoidance and press fit into the guide forming shape during boxing.

As shown in FIGS. 6A and 6B, in order to avoid collision and guide boxing when boxing and press-fitting the upper panel 40 and the lower panel 50 according to an embodiment of the present invention, the upper panel 40 or the lower panel is It can be seen that a plurality of guide forming parts 70 are formed on the press-fit line of (50).

As shown in FIGS. 6A and 6B, this guide forming part 70 is located at each of the front press-fit line 61, the two side press-fit lines 62, the rear press-fit line 63, and the center press-fit line 64. It can be seen that it is composed of at least one forming shape protruding outward on one side.

And as shown in Figure 6b, it can be seen that the guide forming part 70 is not formed on the press-fit line opposite to the position where the guide forming part 70 is formed. Therefore, this guide forming part 70 enables accurate press-fitting when assembling the boxing, and during press-fitting and boxing, collisions on the press-fitting line are avoided and the boxing is guided.

As shown in Figure 7a, if the guide forming part 70 is not applied, a collision is expected during boxing and there is no avoidance section for this, but as shown in Figure 7b, the guide according to the embodiment of the present invention When the forming part 70 is applied, it can be seen that the shape of the guide forming part 70 guides avoidance and press-fitting during boxing, making it possible to easily press-fit and box without collision.

In addition, the apparatus and method described above are not limited to the configuration and method of the above-described embodiments, but all or part of each embodiment can be selectively combined so that various modifications can be made. It may be composed.

1:Subframe
10:Front member
11: Front upper panel
12: Front lower panel
20: Side member
21: Side upper panel
22: Side lower panel
30: Rear member
31: Rear front panel
32: Rear rear panel
40: Upper panel
41: Upper panel front part
42: Upper panel side part
43: Upper panel rear part
50: lower panel
51: Lower panel front part
52: Lower panel side part
53: Lower panel rear part
61: Front press fit line
62: Side press fit line
63: Rear press fit line
64: Center press-fit line
70: Guide forming part
80: Integrated subframe
100: Integrated subframe with boxing guide forming

Claims (5)

As a subframe,
upper panel;
lower panel; and
An integrated sub with boxing guide forming, comprising a plurality of guide forming parts formed on the press-fit line of the upper panel or lower panel to avoid collision and guide boxing when press-fitting the upper panel and the lower panel. frame.
According to clause 1,
The subframe is a rear wheel # type subframe,
Each of the upper panel and the lower panel has a U-shaped cross section,
An integrated subframe with boxing guide forming, characterized in that the front part, the rear part, and a pair of side parts connected between the front part and the rear part are integrally formed.
According to clause 2,
The press-fit lines of the upper panel and the lower panel include a front press-fit line, two side press-fit lines, a rear press-fit line, and a center press-fit line.
In clause 3,
An integrated subframe with boxing guide forming, wherein the guide forming unit has at least one forming shape protruding outward on one side of each of the front press-fit line, two side press-fit lines, rear press-fit line, and center press-fit line.
According to clause 4,
An integrated subframe with boxing guide forming, characterized in that boxing is guided while avoiding collision on the press-fitting line during press-fitting and boxing by the guide forming unit.