CN211592143U - Support mounting structure of lower arm - Google Patents
Support mounting structure of lower arm Download PDFInfo
- Publication number
- CN211592143U CN211592143U CN201922326094.2U CN201922326094U CN211592143U CN 211592143 U CN211592143 U CN 211592143U CN 201922326094 U CN201922326094 U CN 201922326094U CN 211592143 U CN211592143 U CN 211592143U
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- vehicle
- welded joint
- bracket
- joint portion
- mounting structure
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- 238000003466 welding Methods 0.000 claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Abstract
The utility model provides a support mounting structure of underarm. In the mounting structure, the lower arm is provided on a suspension of a vehicle and includes a lower plate and a bracket, a front arm and a rear arm extending from one side of the lower plate located on the inner side in the vehicle width direction to the inner side in the vehicle width direction are connected to a suspension beam of the vehicle, respectively, the other side of the lower plate located on the outer side in the vehicle width direction is joined to the bracket by welding, a virtual straight line passing through an end point on the front side in the vehicle length direction of a welded joint portion between the lower plate and the bracket and an end point on the rear side in the vehicle length direction of the welded joint portion is inclined in the vehicle length direction when viewed from above the vehicle, and the welded joint portion has a plurality of bent portions when viewed from above the vehicle. Based on the above structure of the utility model, can realize the miniaturization and the lightweight of support, can disperse the stress on the welding joint portion again, improve the intensity of welding joint portion.
Description
Technical Field
The utility model relates to a support mounting structure of underarm that sets up on vehicle suspension.
Background
Conventionally, as a lower arm provided in a vehicle suspension, a structure in which a ball joint bracket (hereinafter, simply referred to as a "bracket") made by forging is welded to a lower plate made of a plate is widely used. The welded joint portion where the lower plate and the bracket are joined together needs to have high strength because it receives a load from a road surface or the like.
Fig. 3A shows a bracket mounting structure of a lower arm 300 of the prior art. As shown in fig. 3A, the lower plate 310 of the lower arm 300 and the bracket 350 are joined by welding to form a welded joint portion (welding surface) 370, and the welded joint portion 370 extends straight in the vehicle length direction. Since the welded joint 370 extends straight in the vehicle length direction, the welded joint 370 parallel to the vehicle length direction as a whole becomes a portion capable of receiving bending stress (force for bending the bracket 350 in the vehicle length direction from the vertical direction), and local stress concentration at the welded joint 370 can be avoided.
However, in the case of the structure in which the welded joint 370 extends straight in the vehicle length direction, the shape of the bracket 350 is limited. Therefore, it is difficult to achieve miniaturization and weight reduction of the bracket 350.
Fig. 3B shows a bracket mounting structure of another lower arm 400 of the prior art. As shown in fig. 3B, the lower plate 410 of the lower arm 400 and the bracket 450 are joined by welding, thereby forming a welded joint 470. In order to miniaturize the bracket 450, a part of the solder joint portion 470 is configured to be inclined to the vehicle length direction.
However, in the case of the structure in which a part of the welded joint portion 470 is inclined in the vehicle length direction, since a part of the welded joint portion 470 is inclined in the vehicle length direction, the portion subjected to the bending stress is mainly the other portion parallel to the vehicle length direction, that is, the region AR in fig. 3B. Thus, there arises a problem that stress concentrates on the area AR to cause a decrease in strength of the solder joint portion 470.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, it is an object of the present invention to provide a lower arm bracket mounting structure that can reduce the size and weight of a bracket and can improve the strength of a welded joint by dispersing stress applied to the welded joint for the bracket joined to the lower arm by welding.
As a technical solution to solve the above technical problem, the present invention provides a support mounting structure for a lower arm, in the support mounting structure for the lower arm, the lower arm is provided on a suspension of a vehicle and includes a lower plate and a support, a front arm and a rear arm extending from a side of the lower plate located on an inner side in a vehicle width direction to the inner side in the vehicle width direction are connected to a suspension beam of the vehicle, respectively, and the other side of the lower plate located on the outer side in the vehicle width direction is welded and connected to a hub carrier of the vehicle, wherein the support is joined to the support, and the support is characterized in that: the welded joint portion between the lower plate and the bracket has a plurality of bent portions when viewed from above the vehicle, the welded joint portion being inclined in a vehicle length direction of the vehicle with respect to a virtual straight line passing through an end point on a vehicle length direction front side of the welded joint portion and an end point on a vehicle length direction rear side of the welded joint portion.
The utility model discloses an above-mentioned support mounting structure of lower arm's advantage lies in, the virtual straight line that the extreme point of the car length direction front side of follow welded joint portion and the extreme point of the car length direction rear side of welded joint portion passed through inclines in the car length direction of vehicle, therefore, easily realize the miniaturization and the lightweight of support, in addition, when looking down from the top of vehicle, welded joint portion has a plurality of flexion, therefore welded joint portion's welding area increases to can disperse the stress that acts on welded joint portion, improve welded joint portion's intensity.
In the above-described lower arm bracket mounting structure of the present invention, it is preferable that the welded joint portion has a convex curved portion that bulges outward in the vehicle width direction and a concave curved portion that bulges inward in the vehicle width direction when viewed from above the vehicle. With this configuration, since the welded joint portion has the convex curved portion and the concave curved portion, the area of the welded portion that bears the bending stress (the force that bends the bracket in the vehicle length direction from the vertical direction) can be effectively increased.
In addition, in the above-described lower arm bracket mounting structure of the present invention, preferably, the convex curved portion is located on the vehicle length direction front side of the welded joint portion, the concave curved portion is located on the vehicle length direction rear side of the welded joint portion, and the radius of curvature of the concave curved portion is larger than the radius of curvature of the convex curved portion. With this configuration, since the curvature radius of the concave curved portion on the rear side in the vehicle longitudinal direction is larger than the curvature radius of the convex curved portion on the front side in the vehicle longitudinal direction, the welding area of the concave curved portion on the rear side, which mainly bears the bending stress, can be increased.
In addition, in the above-described lower arm bracket mounting structure of the present invention, preferably, the end point of the vehicle longitudinal direction front side is located more outside in the vehicle width direction than the end point of the vehicle longitudinal direction rear side. With this configuration, since the front end point is located further outward in the vehicle width direction than the rear end point, the strength of the welded joint portion against a load from the front of the vehicle can be increased.
Drawings
Fig. 1 is a plan view showing a bracket mounting structure according to an embodiment of the present invention.
Fig. 2 is an enlarged plan view of the bracket mounting structure shown in fig. 1.
Fig. 3A is a plan view showing a bracket mounting structure of the prior art.
Fig. 3B is a plan view showing another bracket mounting structure of the prior art.
Detailed Description
Hereinafter, a bracket mounting structure of a lower arm according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the "bracket mounting structure of the lower arm" is simply referred to as "bracket mounting structure".
Fig. 1 is a plan view showing a lower arm 200 of a bracket mounting structure 100 according to the present embodiment. In the following drawings, an arrow F indicates the vehicle front side; arrow B indicates the vehicle rear side; arrow R represents the right side of the vehicle; arrow L represents the left side of the vehicle; arrow U indicates the vehicle upper side; arrow D indicates the vehicle underside.
The lower arm 200 is provided on the front suspension of the vehicle. The lower arm 200 includes a lower plate 10 and a bracket 50.
The lower plate 10 has a plate body 11, a first arm (front arm) 21, and a second arm (rear arm) 22. The lower plate 10 is obtained by press-working a plate into a member having a U-shaped cross section.
The panel body 11 constitutes a body of the lower panel 10, and the first arm 21 and the second arm 22 each extend in a V-shape from one side of the panel body 11 located on the inside in the vehicle width direction.
The first arm 21 is configured to extend from an end portion of the front side (F side) of the panel body 11 in the vehicle length direction toward the inside (L side) in the vehicle width direction. A first connecting portion 31 connected to a suspension member (not shown) of the vehicle is attached to an end portion of the first arm 21.
The second arm 22 is configured to extend inward in the vehicle width direction from an end portion on the rear side (B side) in the vehicle length direction of the panel body 11. A second coupling portion 32 connected to a suspension member of the vehicle is attached to an end portion of the second arm 22.
The lower arm 200 is pivotally supported by the first coupling portion 31 and the second coupling portion 32 on a suspension member of the vehicle, and is swingably supported on the vehicle body.
The bracket 50 is a ball joint bracket, and is connected to a hub carrier (not shown) that supports a wheel. The bracket 50 is formed by forging. An end surface of the lower plate 10 on the other side (R side) on the vehicle width direction outer side is joined to the bracket 50 by welding. Here, a portion where the bracket 50 and the lower plate 10 are joined by welding is referred to as a weld joint portion (weld joint surface) 70.
Fig. 2 is a plan view showing the bracket mounting structure 100 shown in fig. 1 in an enlarged manner. In fig. 2, an end point located on the vehicle longitudinal direction front side of welded joint 70 in a vehicle top plan view is defined as first end point 71, an end point located on the vehicle longitudinal direction rear side of welded joint 70 in a vehicle top plan view is defined as second end point 72, and a dashed straight line passing through first end point 71 and second end point 72 is defined as first virtual line L1.
The welded joint 70 is formed such that a first imaginary line L1 passing through the first end point 71 and the second end point 72 is inclined with respect to the vehicle length direction, and the first end point 71 is located more outward (R side) in the vehicle width direction than the second end point 72.
The welded joint 70 has a plurality of bent portions. Specifically, the welded joint portion 70 is constituted by a convex curved portion 81 bulging outward in the vehicle width direction, a concave curved portion 83 bulging inward in the vehicle width direction, and a connecting curved portion 85 connecting the convex curved portion 81 and the concave curved portion 83.
The convex curve 81 is located on the front side in the vehicle length direction, and the concave curve 83 is located on the rear side in the vehicle length direction. The radius of curvature of the concave curved portion 83 is larger than that of the convex curved portion 81.
Since the welded joint 70 is formed such that the first virtual line L1 passing through the first end point 71 and the second end point 72 is inclined with respect to the vehicle length direction, it is easy to achieve downsizing and weight saving of the bracket 50, as compared with a structure (fig. 3A) in which the welded joint extends straight.
Since the welded joint 70 has the convex curved portion 81 and the concave curved portion 83, the welding area can be increased. Further, since the radius of curvature of the concave curved portion 83 is larger than the radius of curvature of the convex curved portion 81, the welding area of the rear concave curved portion 83 mainly receiving the bending stress can be increased, and the stress acting on the welded joint portion 70 can be effectively dispersed.
The convex curved portion 81 is located more outward in the vehicle width direction than the concave curved portion 83. Therefore, the bracket 50 is more easily miniaturized and lightened.
As described above, according to the bracket mounting structure 100 of the present embodiment, the lower arm 200 in which the bracket 50 is welded to the lower plate 10 can be reduced in size and weight of the bracket 50, and the strength of the weld joint 70 can be improved by dispersing the stress applied to the weld joint 70.
The present invention is not limited to the description of the above embodiments, and can be modified as appropriate. For example, in the above embodiment, the example in which the welded joint 70 has the convex curved portion 81, the concave curved portion 83, and the coupling curved portion 85 is described, but the number and shape of the curved portions are not limited.
Claims (4)
1. A bracket mounting structure of a lower arm that is provided in a suspension of a vehicle and that includes a lower plate and a bracket, a front arm and a rear arm that extend from one side of the lower plate that is located on an inner side in a vehicle width direction to the inner side in the vehicle width direction being connected to a suspension member of the vehicle, respectively, and the other side of the lower plate that is located on the outer side in the vehicle width direction being joined to the bracket that is connected to a hub carrier of the vehicle by welding, characterized in that:
a virtual straight line passing through an end point on a vehicle longitudinal direction front side of a welded joint portion between the lower plate and the bracket and an end point on a vehicle longitudinal direction rear side of the welded joint portion is inclined to a vehicle longitudinal direction of the vehicle when viewed from above the vehicle,
the welded joint portion has a plurality of bent portions when viewed from above the vehicle.
2. The lower arm bracket mounting structure according to claim 1, wherein:
the welded joint portion has a convex curved portion bulging outward in the vehicle width direction and a concave curved portion bulging inward in the vehicle width direction when viewed from above the vehicle.
3. The bracket mounting structure for the lower arm according to claim 2, wherein:
the convex curved portion is located on a vehicle-length-direction front side of the welded joint portion, the concave curved portion is located on a vehicle-length-direction rear side of the welded joint portion, and a radius of curvature of the concave curved portion is larger than a radius of curvature of the convex curved portion.
4. The lower arm bracket mounting structure according to any one of claims 1 to 3, wherein:
the end point of the vehicle longitudinal direction front side is located further outside in the vehicle width direction than the end point of the vehicle longitudinal direction rear side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922326094.2U CN211592143U (en) | 2019-12-20 | 2019-12-20 | Support mounting structure of lower arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922326094.2U CN211592143U (en) | 2019-12-20 | 2019-12-20 | Support mounting structure of lower arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211592143U true CN211592143U (en) | 2020-09-29 |
Family
ID=72594483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922326094.2U Active CN211592143U (en) | 2019-12-20 | 2019-12-20 | Support mounting structure of lower arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211592143U (en) |
-
2019
- 2019-12-20 CN CN201922326094.2U patent/CN211592143U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |