CN213082838U

CN213082838U - H-shaped arm and automobile multi-link rear suspension

Info

Publication number: CN213082838U
Application number: CN202021962996.1U
Authority: CN
Inventors: 孔德俊; 王进; 戴锐
Original assignee: Dongfeng Motor Co Ltd
Current assignee: Dongfeng Motor Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-04-30
Anticipated expiration: 2030-09-09

Abstract

The utility model discloses a suspension behind H type arm and the many connecting rods of car, H type arm include metal framework and combined material layer, the combined material layer package is moulded metal framework's outside, combined material layer's upper surface is equipped with spring mounting groove, and the lower surface is equipped with honeycomb. The metal framework in the utility model mainly has the functions of fastening position and residual strength guarantee, and ensures that the part still has certain strength and perceptibility even if the composite material layer is damaged; the upper surface of the composite material layer mainly bears spring counterforce, and meanwhile, the lower surface of the composite material layer adopts a honeycomb structure, so that ground vibration and noise can be absorbed, and the comfort and NVH (noise, vibration and harshness) performance of the whole vehicle are improved. Compared with an integral aluminum alloy cast H arm, the cost is reduced by about 20 percent, and the light weight effect is increased by about 20 percent; compared with a sheet metal forming H-shaped arm, the production process steps are simplified, the light weight effect is increased by about 50%, and meanwhile, the part cost is reduced by about 10%.

Description

H-shaped arm and automobile multi-link rear suspension

Technical Field

The utility model relates to a technical field of car especially relates to a suspension behind H type arm and the car multi-link.

Background

The H-shaped arm is an important component part in the automobile multi-link rear suspension, and can only be produced by adopting an aluminum alloy integral casting mode or a sheet metal structure which is disassembled into 2 arms for assembly at present due to the complex structure of the H-shaped arm.

However, casting with aluminum alloys is costly.

Due to the limitation of a forming process, the sheet metal structure cannot be integrally formed by the H-shaped arm, and the H-shaped arm needs to be split into 2 arms and then combined through bolts. The heavy weight of the parts of this construction increases the unsprung mass and has a detrimental effect on fuel consumption and handling performance.

Therefore, there is a need for a low cost, lightweight H-arm and automotive multi-link rear suspension.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a suspension behind H type arm and the car multi-link with low costs, lightweight.

The technical scheme of the utility model provide an H type arm, including metal framework and combined material layer, the combined material layer package is moulded metal framework's outside, combined material layer's upper surface is equipped with spring mounting groove, and the lower surface is equipped with honeycomb.

Further, the combined material layer includes main atress portion and spring mounting portion, metal framework sets up in the main atress portion, spring mounting groove sets up spring mounting portion's upper surface, the thickness of main atress portion is greater than spring mounting portion's thickness.

Further, the honeycomb structure includes triangle-shaped honeycomb structure and hexagon honeycomb structure, triangle-shaped honeycomb structure sets up the lower surface of main atress portion, hexagon honeycomb structure sets up the lower surface of spring mounting portion.

Further, the thickness of each side of the hexagonal honeycomb structure is 2-4 mm.

Furthermore, a plurality of reinforcing ribs are arranged on the upper surface of the main force bearing part, and the reinforcing ribs divide the upper surface of the main force bearing part into a plurality of triangles.

Further, metal framework includes first panel beating, second panel beating and installing support, the one end of first panel beating with the welding of second panel beating, the other end with the installing support welding, the partial structure of installing support stretches out outside the combined material layer.

Further, a plurality of through holes have been seted up on the first panel beating with the second panel beating, the combined material layer passes the through hole forms a plurality of rivets of moulding plastics.

Further, the first metal plate and the second metal plate are both provided with sleeves, and the bushings are pressed in the sleeves.

Furthermore, a high-viscosity corrosion-resistant adhesive is further arranged between the metal framework and the composite material layer, and at least part of the composite material layer is coated outside the metal framework in a double-faced mode.

The utility model also provides a suspension behind car multi-link, including back sub vehicle frame, last connecting rod and knuckle, still include above-mentioned arbitrary H type arm, H type arm with back sub vehicle frame with the knuckle is connected, it connects to go up the connecting rod back sub vehicle frame with between the knuckle.

After adopting above-mentioned technical scheme, have following beneficial effect:

the metal framework in the utility model mainly has the functions of fastening position and residual strength guarantee, and ensures that the part still has certain strength and perceptibility even if the composite material layer is damaged; the upper surface of the composite material layer mainly bears spring counterforce, and meanwhile, the lower surface of the composite material layer adopts a honeycomb structure, so that ground vibration and noise can be absorbed, and the comfort and NVH (noise, vibration and harshness) performance of the whole vehicle are improved. Compared with an integral aluminum alloy cast H arm, the cost is reduced by about 20 percent, and the light weight effect is increased by about 20 percent; compared with a sheet metal forming H-shaped arm, the production process steps are simplified, the light weight effect is increased by about 50%, and meanwhile, the part cost is reduced by about 10%.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

fig. 1 is a perspective view of an H-shaped arm according to an embodiment of the present invention;

fig. 2 is a perspective view of a metal frame according to an embodiment of the present invention;

fig. 3 is a bottom view of an H-arm according to an embodiment of the present invention;

fig. 4 is a schematic top view of an H-arm according to an embodiment of the present invention;

fig. 5 is a schematic view of the assembly of the H-shaped arm and the bushing according to an embodiment of the present invention;

FIG. 6 is a schematic view of an injection molded rivet for an H-arm according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of an injection molded rivet according to an embodiment of the present invention;

fig. 8 is a sectional view of the double-sided plastic-coated portion of the H-shaped arm according to an embodiment of the present invention;

fig. 9 is a schematic view of an automotive multi-link rear suspension according to another embodiment of the present invention.

Reference symbol comparison table:

metal framework 1: the mounting structure comprises a first sheet metal 11, a second sheet metal 12, a mounting bracket 13, a sleeve 111, a sleeve 121, a through hole 112 and a through hole 122;

composite material layer 2: the main stress part 21, the spring mounting part 22, the injection-molded rivet 23, the reinforcing rib 211, the triangular honeycomb structure 212, the spring mounting groove 221 and the hexagonal honeycomb structure 222;

a lining 3, a high-viscosity corrosion-resistant adhesive 4;

h-shaped arm 10, rear sub-frame 20, upper link 30, knuckle 40, and spring 50.

Detailed Description

The following describes the present invention with reference to the accompanying drawings.

It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

In an embodiment of the present invention, as shown in fig. 1-2, the H-shaped arm includes a metal frame 1 and a composite material layer 2, the composite material layer 2 is wrapped and molded outside the metal frame 1, the upper surface of the composite material layer 2 is provided with a spring mounting groove 221, and the lower surface is provided with a honeycomb structure.

Specifically, the H-shaped arm in this embodiment is composed of two parts, including metal framework 1 and composite material layer 2, and metal framework 1 is mainly for fastening position and residual intensity guarantee effect as the bearing structure of H-shaped arm, guarantees that the part still has certain intensity even the composite material layer destroys, has perception, and metal framework 1 can adopt the panel beating, is favorable to reduce cost.

The composite material layer 2 is wrapped outside the metal framework 1 and has excellent impact resistance. A spring installation groove 221 of the upper surface of the composite material layer 2 for installing and positioning the spring 50 (see fig. 9). The composite material layer 2 is light in weight, so that the light-weight design of the whole H-shaped arm is facilitated, and the oil consumption is reduced.

As shown in fig. 3, the honeycomb structure is disposed on the lower surface of the composite material layer 1, so as to absorb ground vibration and noise, and improve the comfort and NVH performance of the whole vehicle.

Further, as shown in fig. 1, the composite material layer 2 includes a main force receiving portion 21 and a spring mounting portion 22, the metal skeleton 1 is disposed in the main force receiving portion 21, the spring mounting groove 221 is disposed on an upper surface of the spring mounting portion 22, and a thickness of the main force receiving portion 21 is greater than a thickness of the spring mounting portion 22.

Specifically, the main force-bearing part 21 is used for bearing a larger acting force, and the metal framework 1 is arranged in the main force-bearing part 21, so that the main force-bearing part 21 is better supported. Meanwhile, the thickness of the main force-receiving portion 21 is greater than that of the spring mounting portion 22, and the structural strength of the main force-receiving portion 21 is also increased.

Further, as shown in fig. 3, the honeycomb structure includes a triangular honeycomb structure 212 and a hexagonal honeycomb structure 222, the triangular honeycomb structure 212 is provided on the lower surface of the main force receiving portion 21, and the hexagonal honeycomb structure 222 is provided on the lower surface of the spring mounting portion 22.

The triangular honeycomb structure 212 can improve the strength and stability of the main force-bearing part 21; the hexagonal honeycomb structure 222 corresponds to the spring reaction force bearing position, so that the stress distribution is uniform. The triangular honeycomb structure 212 and the hexagonal honeycomb structure 222 can both play a role in absorbing ground vibration and noise and improving the comfort and NVH performance of the whole vehicle.

Preferably, the hexagonal honeycomb structure 222 is a regular hexagon, and the thickness of each side is 2-4mm, and the area of each hexagonal unit can be flexibly adjusted according to the stress of the structure.

Further, as shown in fig. 4, the upper surface of the main force receiving portion 21 is provided with a plurality of ribs 211, and the ribs 211 divide the upper surface of the main force receiving portion 21 into a plurality of triangles. The triangular stress structure can further increase the structural strength of the main stress part 21 and reduce deformation.

Preferably, the thickness of the reinforcing ribs 211 is 4 mm.

Optionally, the thickness of the stiffener 211 may be adjusted according to the force.

Further, as shown in fig. 2, the metal framework 1 includes a first metal plate 11, a second metal plate 12 and a mounting bracket 13, one end of the first metal plate 11 is welded to the second metal plate 12, the other end of the first metal plate is welded to the mounting bracket 13, and a part of the structure of the mounting bracket 13 extends out of the composite material layer 2.

Specifically, in fig. 2, the first sheet metal 11 and the second sheet metal 12 are made of sheet metal, the left end of the first sheet metal 11 is welded to the mounting bracket 13, and the right end of the first sheet metal 11 is welded to the second sheet metal 12. The right end of the first sheet metal 11 is provided with a sleeve 111, and the lower end of the second sheet metal 12 is also provided with a sleeve 121.

The first sheet metal 11, the second sheet metal 12 and the mounting bracket 13 form a herringbone metal framework 1, and the main stress part 21 is formed in an injection mode and wraps the first sheet metal 11, the second sheet metal 12 and the mounting bracket 13. The part of the mounting bracket 13 is not wrapped and extends out of the main force-bearing part 21 for connecting with other external vehicle body structures.

In this embodiment, the metal framework 1 is formed by welding a plurality of metal plates, so that the cost is reduced.

Further, as shown in fig. 5, sleeves (111, 121) are arranged on the first sheet metal 11 and the second sheet metal 12, and the bush 3 is press-fitted into the sleeves (111, 121).

The composite layer 2 is wrapped outside the sleeve (111, 121), and the inside of the sleeve (111, 121) is still a metal surface which is in interference fit with the bushing 3.

Further, as shown in fig. 2 and 6, a plurality of through holes (112,122) are formed in the first sheet metal 11 and the second sheet metal 12, and the composite material layer 2 penetrates through the through holes (112,122) to form a plurality of injection-molded rivets 23.

Specifically, as shown in fig. 7, when the composite material layer 2 is injected, the composite material layer passes through the through holes (112,122), and after the composite material layer passes through the through holes (112,122), injection rivets 23 are formed on the outer surfaces of the first sheet metal 11 and the second sheet metal 12, and the diameter of each injection rivet 23 is larger than that of each through hole (112, 122).

The injection-molded rivet 23 can increase the connection stability between the composite material layer 2 and the metal framework 1, and simultaneously reduce the cost.

Further, as shown in fig. 8, a high-viscosity corrosion-resistant adhesive 4 is further disposed between the metal framework 1 and the composite material layer 2, and at least a portion of the composite material layer 2 is coated on the outer portion of the metal framework 1.

The composite material layer 2 adopts a double-sided plastic coating process on the inner surfaces of the sleeves (111, 121) on the first sheet metal 11 and the second sheet metal 12. Meanwhile, the part of the mounting bracket 13 adopts a double-sided plastic coating process.

The high-viscosity corrosion-resistant adhesive 4 can increase the structural strength between the metal framework 1 and the composite material layer 2, and meanwhile, the high-viscosity corrosion-resistant adhesive 4 has excellent corrosion resistance, so that the traditional electrophoretic paint process can be omitted.

In an embodiment of the present invention, the manufacturing process of the H-shaped arm is as follows:

the first step is as follows: stamping a metal plate to form a metal framework 1, and then welding and connecting three parts of the metal framework 1;

the second step is that: the laser irradiation is adopted to improve the surface roughness and the oxidation level of the metal framework 1, which is beneficial to the combination of the composite material layer 2 and the metal framework 1 during injection molding.

The third step: powder electrostatic spraying is carried out on the surface of the metal framework 1, and the copolyamide hot melt adhesive is copolymerized, so that the metal framework has excellent corrosion resistance.

The fourth step: the composite layer 2 is injection molded.

The composite material layer 2 in the embodiment is made of PA66+ GF, and has the advantages of certain structural strength, toughness, elasticity and light weight. Alternatively, other composite materials may be used.

As shown in fig. 9, in another embodiment of the present invention, the rear suspension with multiple connecting rods for an automobile includes a rear subframe 20, an upper connecting rod 30, a knuckle 40, and an H-shaped arm 10 according to any one of the above embodiments, wherein the H-shaped arm 10 is connected to the rear subframe 20 and the knuckle 40, and the upper connecting rod 30 is connected between the rear subframe 20 and the knuckle 40.

Specifically, the bush 3 of the H-arm 10 is connected to the rear subframe 20; the mounting bracket 13 of the H-shaped arm 10 is connected with the steering knuckle 40; the upper link 30 is connected between the knuckle 40 and the rear sub frame 20, and is not directly connected with the H-arm 10; the spring 50 is installed in the spring installation groove 221 of the H-shaped arm 10.

What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.

Claims

1. The utility model provides a H type arm, its characterized in that, includes metal framework and combined material layer, the combined material layer package is moulded metal framework's outside, combined material layer's upper surface is equipped with spring mounting groove, and the lower surface is equipped with honeycomb.

2. The H-shaped arm according to claim 1, wherein the composite material layer comprises a main stress part and a spring installation part, the metal framework is arranged in the main stress part, the spring installation groove is arranged on the upper surface of the spring installation part, and the thickness of the main stress part is larger than that of the spring installation part.

3. An H-arm according to claim 2 wherein said honeycomb structure comprises a triangular honeycomb structure provided on the lower surface of said main force-receiving portion and a hexagonal honeycomb structure provided on the lower surface of said spring-mounting portion.

4. An H-arm according to claim 3 wherein each side of the hexagonal honeycomb structure is 2-4mm thick.

5. An H-arm according to claim 2 wherein the upper surface of the main force receiving portion is provided with a plurality of ribs dividing the upper surface of the main force receiving portion into a plurality of triangles.

6. The H-shaped arm according to claim 1, wherein the metal framework comprises a first metal plate, a second metal plate and a mounting bracket, one end of the first metal plate is welded with the second metal plate, the other end of the first metal plate is welded with the mounting bracket, and part of the structure of the mounting bracket extends out of the composite material layer.

7. The H-shaped arm according to claim 6, wherein a plurality of through holes are formed in the first metal plate and the second metal plate, and the composite material layer penetrates through the through holes to form a plurality of injection molding rivets.

8. An H-arm according to claim 6 wherein sleeves are provided on both the first and second sheet metal, and bushings are press-fitted into the sleeves.

9. An H-arm according to claim 1, characterized in that a high viscosity corrosion resistant adhesive is further provided between said metal skeleton and said composite material layer, said composite material layer being at least partially double-coated outside said metal skeleton.

10. A multi-link rear suspension for a vehicle comprising a rear sub-frame, an upper link and a knuckle, further comprising an H-arm according to any one of claims 1 to 9, said H-arm being connected to said rear sub-frame and said knuckle, said upper link being connected between said rear sub-frame and said knuckle.