Rear suspension assembly and vehicle

Abstract

The utility model belongs to the technical field of non-bearing type vehicle bodies, and provides a rear suspension assembly and a vehicle, the rear suspension assembly comprises an upper beam and a lower beam, the upper beam comprises two upper longitudinal beams; the lower beam comprises two groups of lower longitudinal beams and a plurality of lower cross beams, the plurality of lower cross beams are mounted between the two groups of lower longitudinal beams at intervals, and each group of lower longitudinal beams form an annular structure in an up-down connection manner; the lower beam is installed on the upper longitudinal beams through the lower cross beams, and the lower beam and the two upper longitudinal beams form a closed-loop connection structure with an assembly space. The distance between the two upper longitudinal beams is larger than the maximum distance between the two lower cross beams of the lower beam. The problem that rear suspension space arrangement is difficult or space is insufficient can be solved, the torsional rigidity of the upper beam can be greatly improved, and the performance and quality of the whole vehicle are improved.

Description

Technical Field

[0001] The present application relates to the technical field of non - load - bearing vehicle bodies, and particularly to a rear suspension assembly and a vehicle. Background Art

[0002] The rear suspension refers to the general term for all force - transmitting connection devices between the vehicle frame and the axle or wheels. It can transmit the force and torque between the wheels and the frame, play a role in buffering the impact force transmitted from the uneven road surface to the vehicle body, and ensure the smoothness of vehicle driving.

[0003] As a key part of the vehicle chassis, the rear suspension has similarities in structure with the front suspension. However, due to the arrangement of components such as drive shafts and fuel tanks around the rear suspension, more space factors need to be considered in its design. For the rear suspension assembly, in addition to the simple leaf spring configuration, more and more vehicle manufacturers install multi - link rear suspensions on the whole vehicle.

[0004] The multi - link rear suspension is a design that regulates the change of wheel position through the combination of 3 to 5 rods. It combines the characteristics of the transverse arm type and the longitudinal arm type. By adjusting the angle between the swing arm axis and the vehicle longitudinal axis, it can flexibly adapt to different usage scenarios. However, this rear suspension brings more components and a more complex structure, which puts higher requirements on the rear assembly space of the overall layout, thus causing problems such as difficult or insufficient rear suspension layout space.

[0005] In the existing vehicle chassis technology, various multi - link rear suspension system structures have been proposed, but most multi - link rear suspensions are directly assembled on the girder, that is, on the vehicle frame. For example, the patent with the publication number CN107804129B discloses a multi - link rear suspension system and a vehicle, including a vehicle frame, a rear axle, a multi - link mechanism, a coil spring, and a shock absorber. The coil spring and the shock absorber are symmetrically arranged on the vehicle frame and the rear axle; the multi - link mechanism includes an upper longitudinal link and a lower longitudinal link. The upper longitudinal link and the lower longitudinal link are symmetrically arranged on the vehicle frame and the rear axle. The length of the upper longitudinal link is less than that of the lower longitudinal link. The four connection points where the upper longitudinal link and the lower longitudinal link are connected to the vehicle frame and the rear axle are sequentially connected to form a right - angled trapezoid.

[0006] Although the above - mentioned structure can reduce the vehicle bumpiness and ensure the stable driving of the whole vehicle, it still cannot solve the problems of difficult or insufficient rear suspension space layout of the vehicle. Utility Model Content

[0007] In view of the above - mentioned shortcomings of the existing technology, the present utility model provides a rear suspension assembly and a vehicle to solve the problems such as difficult or insufficient rear suspension space layout when a multi - link rear suspension is installed on a vehicle.

[0008] To achieve the above - mentioned purpose and related purposes, the present utility model adopts the following technical solutions:

[0009] In the first aspect of the present utility model, a rear suspension assembly is provided, which includes an upper beam and a lower beam. The upper beam includes two upper longitudinal beams; the lower beam includes two groups of lower longitudinal beams and a plurality of lower cross beams. The plurality of lower cross beams are installed at intervals between the two groups of lower longitudinal beams. Each group of lower longitudinal beams forms an annular structure in an up-and-down connection form;

[0010] The lower beam is installed on the upper longitudinal beam through the lower cross beam and forms a closed-loop connection structure with the two upper longitudinal beams, having an assembly space;

[0011] The distance between the two upper longitudinal beams is greater than the maximum distance between the two lower cross beams of the lower beam.

[0012] Furthermore, the upper beam further includes a plurality of upper cross beams, which are installed at intervals between the two upper longitudinal beams.

[0013] Furthermore, the upper beam further includes a plurality of brackets, which are respectively installed on the upper longitudinal beams. The lower beam is installed on the upper beam through the brackets.

[0014] Furthermore, the bracket includes two outer plates, and the two outer plates are buckled inside and outside to make the bracket in a box-shaped structure.

[0015] Furthermore, the bracket includes an outer plate, and the outer plate is in a triangular diagonal bracing structure.

[0016] Furthermore, the bracket includes an inner plate, and the inner plate is in a groove shape and is installed inside the bracket.

[0017] Furthermore, the lower beam further includes at least two auxiliary brackets, which are installed on each group of lower longitudinal beams.

[0018] Furthermore, the plurality of lower cross beams include a fourth cross beam, a fifth cross beam, and a sixth cross beam. The fifth cross beam is installed between the fourth cross beam and the sixth cross beam. The distance between the fourth cross beam and the sixth cross beam is X, and the distance between the fifth cross beam and the sixth cross beam is Y. X and Y satisfy the following relational expression:

[0019] X > 2Y.

[0020] In the second aspect of the present utility model, a vehicle is provided, and the above rear suspension assembly is installed on the vehicle.

[0021] Furthermore, the vehicle further includes a multi-link rear suspension, and the multi-link rear suspension is assembled on the lower beam.

[0022] The beneficial technical effects of the present utility model are as follows:

[0023] In each group of the utility model, the upper and lower longitudinal beams are connected up and down to form an annular structure, so that there is a certain drop space in the rear suspension assembly. Furthermore, a closed-loop connection structure with a certain assembly space is formed between the upper beam and the lower beam. The lower beam is assembled by using the upper beam, and the multi-link rear suspension is assembled by using the lower beam. Compared with the prior art in which the multi-link rear suspension is entirely assembled on the upper beam, the utility model can solve the problems of difficult rear suspension space layout or insufficient space, and can greatly improve the torsional stiffness of the upper beam, thus improving the vehicle performance and quality.

[0024] The utility model controls the distance between the upper longitudinal beams of the upper beam to be greater than the maximum distance between the two lower cross beams of the lower beam, so as to form a "larger upper and smaller lower" assembly form, which helps to utilize the advantage of the high strength of the upper beam of the non-load-bearing body, improve the overall performance of the rear part of the vehicle, and is conducive to space layout.

[0025] Since the upper and lower beams of the rear suspension assembly of the utility model are separated, the disassembly and decoupling of the rear suspension components are realized, which can greatly improve the assembly efficiency and production rhythm, and has popularization value in the technical field of non-load-bearing bodies.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0027] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with this application, and are used together with the specification to explain the principle of this application. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0028] Figure 1 is a schematic diagram of the overall structure of the rear suspension assembly of this application;

[0029] Figure 2 is Figure 1 a structural disassembly diagram;

[0030] Figure 3 is Figure 1 a partial enlarged detail drawing, including detail drawing A and detail drawing B;

[0031] Figure 4 is Figure 3 a sectional view of detail drawing A;

[0032] Figure 5 is Figure 3 a sectional view of detail drawing B;

[0033] Figure 6 is a schematic diagram of the upper beam structure of this application;

[0034] Figure 7 This is a schematic diagram of the lower beam structure of the present application.

[0035] Reference numerals

[0036] 1: upper beam; 2: lower beam; 3: standard part; 11: upper longitudinal beam; 12: first cross beam; 13: second cross beam; 14: third cross beam; 15: first bracket; 16: second bracket; 17: accessory bracket; 18: fourth cross beam; 19: fifth cross beam; 20: sixth cross beam; 21: lower longitudinal beam; 22: bushing; 23: first outer plate; 24: sleeve; 25: first inner plate; 26: second outer plate; 27: second inner plate. Specific embodiments

[0037] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention and not for limiting the protection scope of the present invention.

[0038] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0039] In the diagrams of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", etc. indicating the orientation or position relationship, it is based on the orientation or position relationship shown in the diagrams. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the diagrams are only for illustrative purposes and cannot be understood as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] The present invention provides a rear suspension assembly, including an upper beam 1 and a lower beam 2. The upper beam 1 includes two upper longitudinal beams 11; the lower beam 2 includes two groups of lower longitudinal beams 21 and a plurality of lower cross beams. The plurality of lower cross beams are installed at intervals between the two groups of lower longitudinal beams 21, and each group of lower longitudinal beams 21 forms an annular structure in an up-and-down connection form;

[0041] The lower beam 2 is installed on the upper longitudinal beam 11 through the lower cross beam and forms a closed-loop connection structure with an assembly space with the two upper longitudinal beams 11;

[0042] The distance between the two upper longitudinal beams 11 is greater than the maximum distance between the two lower cross beams of the lower beam 2.

[0043] In some embodiments, as Figure 1 and Figure 2 shown, this application uses the upper beam 1 to complete the assembly of the lower beam 2, and uses the lower beam 2 to complete the assembly of the multi-link rear suspension. Compared with the prior art in which the multi-link rear suspension is all assembled on the upper beam 1, this application can solve the problems of difficult rear suspension space layout or insufficient space, and can greatly improve the torsional stiffness of the upper beam 1 (compared with the structure without the lower beam 2), improving the vehicle performance and quality.

[0044] Furthermore, the lower cross beam and the upper longitudinal beam 11 of this application are flexibly connected by standard parts 3 with the help of rubber bushings 22 to form a closed-loop connection structure with a certain assembly space. The standard parts 3 referred to in this application include bolts, studs and nuts, etc.

[0045] In some embodiments, the distance between the upper longitudinal beams 11 of the upper beam 1 of this application is greater than the maximum distance between the two lower cross beams of the lower beam 2 to form a "larger on top and smaller at the bottom" assembly form, which helps to utilize the advantages of the strong rigidity of the upper beam 1 of the non-load-bearing body, improve the overall performance of the rear part of the vehicle, and is conducive to space layout.

[0046] In some embodiments, as Figure 6 shown, the upper beam 1 of this application further includes a plurality of upper cross beams, and the plurality of upper cross beams are installed at intervals between the two upper longitudinal beams 11. The plurality of upper cross beams of this application include a first cross beam 12, a second cross beam 13 and a third cross beam 14. The second cross beam 13 is installed between the first cross beam 12 and the third cross beam 14. Two closed-loop structures are formed between the plurality of upper cross beams and the two upper longitudinal beams 11 to further improve the rigidity of the upper beam 1.

[0047] In some embodiments, as Figure 7 shown, the plurality of lower cross beams of this application include a fourth cross beam 18, a fifth cross beam 19, and a sixth cross beam 20. The fifth cross beam 19 is installed between the fourth cross beam 18 and the sixth cross beam 20. Two closed-loop structures are formed between the plurality of lower cross beams and the two groups of lower longitudinal beams 21 to further improve the rigidity of the lower beam 2.

[0048] In some embodiments, each group of lower longitudinal beams 21 of this application includes two lower longitudinal beams 21, and the two ends of the two lower longitudinal beams 21 are welded together up and down, so that each group of lower longitudinal beams 21 forms an annular structure, so that the rear suspension assembly has a certain drop space, that is, an assembly space.

[0049] In some embodiments, the upper beam 1 of the present application further includes a plurality of brackets and long stud bolts assembled on the brackets. The brackets are used to provide an installation position for the lower beam 2. The plurality of brackets are respectively installed on the upper longitudinal beam 11, and the lower beam 2 is installed on the upper beam 1 through the brackets.

[0050] In some embodiments, as Figures 3 to 5 shown, the brackets of the present application include two first brackets 15 and two second brackets 16. Based on the comprehensive factors of ensuring uniform force, reducing assembly problems, saving costs and cycles with two parts in one mold, and beautiful appearance, the two first brackets 15 of the present application are respectively symmetrically arranged on the two upper longitudinal beams 11, and the two second brackets 16 are respectively symmetrically arranged on the two upper longitudinal beams 11.

[0051] Furthermore, the front side of the present application is the head direction, and the rear side is the tail direction. The two first brackets 15 of the present application are installed on the front side of the upper longitudinal beam 11, and the two second brackets 16 are installed on the rear side of the upper longitudinal beam 11. The installation methods referred to in the present application include but are not limited to welding.

[0052] Furthermore, as Figure 3 and Figure 4 shown, the brackets of the present application include two outer plates. Preferably, the second bracket 16 includes two outer plates. Here, the two outer plates are the second outer plates 26. The two second outer plates 26 are buckled inside and outside to make the second bracket 16 in a box-shaped structure, that is, a "semi-closed boxed" cavity structure. The structure of the second bracket 16 of the present application can not only provide a platform with a sufficient support surface for the installation of the rear part of the lower beam 2 to ensure the stability of the rear assembly, but also increase the welding surface connection between the second bracket 16 and the upper beam 1 to improve the reliable durability of welding.

[0053] Furthermore, the brackets of the present application include an inner plate and a bushing 24. Preferably, the second bracket 16 includes a second inner plate 27 in a groove shape and installed inside the second bracket 16. The bushing 24 here is structurally matched with the second inner plate 27 and has a threaded structure. The second outer plate 26 of the present application is used to realize the welding fixation of the second bracket 16 on the upper longitudinal beam 11. The second inner plate 27 is used as a reinforcement for the second outer plate 26 to enhance the rigidity and strength. While meeting the assembly of the rear part of the lower beam 2, it provides a connection body for the upper welding of the bushing 24. The bushing 24 here is placed inside the second bracket 16 and is fixed in position with the second outer plate 26 and the second inner plate 27 by welding respectively.

[0054] In some embodiments, as Figure 3 and Figure 5As shown, the bracket of the present application includes an outer plate. Preferably, the first bracket 15 includes an outer plate, and the outer plate here is the first outer plate 23. The first outer plate 23 is in a triangular bracing structure and is also similar to a cavity structure in the shape of an open boat. The first outer plate 23 of the present application can not only provide a platform with a sufficient support surface for the installation of the front part of the lower beam 2 to ensure the stability of the front assembly, but also increase the welding area between the first bracket 15 and the upper longitudinal beam 11 to improve the reliable durability of welding.

[0055] Furthermore, the bracket of the present application includes an inner plate and a bushing 24. Preferably, the first bracket 15 includes a first inner plate 25 that is in a trough shape and is installed inside the first bracket 15. The bushing 24 here is structurally matched with the first inner plate 25 and has a threaded structure. The first outer plate 23 of the present application is used to realize the welding and fixing of the first bracket 15 on the upper longitudinal beam 11. The first inner plate 25 is used as a reinforcement for the first outer plate 23 to enhance the rigidity and strength. While meeting the assembly of the front part of the lower beam 2, it provides a connection body for the upper part welding of the bushing 24. The bushing 24 here is placed inside the first bracket 15 and is fixed in position with the first outer plate 23 and the first inner plate 25 respectively by welding.

[0056] In some embodiments, as Figure 7 shown, the fourth crossbeam 18 of the present application is located on the front side of the lower beam 2, the sixth crossbeam 20 is located on the rear side of the lower beam 2, the distance between the fourth crossbeam 18 and the sixth crossbeam 20 is X, the distance between the fifth crossbeam 19 and the sixth crossbeam 20 is Y, and X and Y satisfy the following relationship: X > 2Y. Furthermore, the fourth crossbeam 18, the fifth crossbeam 19, the sixth crossbeam 20 and the two groups of lower longitudinal beams 21 of the present application can form a "three - cross and four - longitudinal" compact layout and connection form, which helps to make the most of the loop - shaped space.

[0057] In some embodiments, the lower beam 2 further includes at least two accessory brackets 17, and the accessory brackets 17 are installed on each group of lower longitudinal beams 21. The accessory brackets 17 of the present application are symmetrically arranged on the two groups of lower longitudinal beams 21, and the accessory brackets 17 are used to meet the installation of multi - link rear suspension components, thereby improving the flexibility of the vehicle rear - space layout.

[0058] In some embodiments, the lower beam 2 of the present application is also provided with a plurality of bushings 22 required for the front - part assembly and the rear - part assembly of the lower beam 2. One bushing 22 is provided at each end of the fourth crossbeam 18 on the front side. It is matched with the bushing 24 of the first bracket 15 and is integrally connected by a press - fitting process, and is nested in the set installation holes at both ends of the fourth crossbeam 18.

[0059] Furthermore, one bushing 22 is provided at each end of the sixth crossbeam 20 on the rear side of the lower beam 2. It is matched with the bushing 24 of the second bracket 16 and is integrally connected by a press - fitting process, and is nested in the set installation holes at both ends of the sixth crossbeam 20.

[0060] In some embodiments, when performing the assembly on the vehicle general assembly line, after completing the flipping process of the upper beam 1, first move the lower beam 2 to the lower side of the upper beam 1 through a lifting trolley. Then, taking the two studs of the upper beam 1 as the pre-installation positioning reference, respectively pre-insert the studs into the bushings 22 at both ends of the fourth cross beam 18, and pre-install nuts on the studs. Then, pass the bolts through the bushings 22 at both ends of the sixth cross beam 20 from bottom to top, and insert them into the sleeve 24 holes of the two second brackets 16 (if there is a deviation between the hole positions of the bushing 22 and the sleeve 24, fine-tuning needs to be carried out by moving the rear end of the lower beam 2). Finally, torque-tighten and color-code the pre-installed nuts, and torque-tighten and color-code the bolts, thereby completing the assembly of the lower beam 2 on the upper beam 1. During this process, the design of the studs and the above-mentioned assembly process sequence can improve the labor efficiency in the vehicle workshop, and thus shorten the general assembly production beat.

[0061] The present utility model also provides a vehicle, which is equipped with the above-mentioned rear suspension assembly.

[0062] In some embodiments, the vehicle further includes a multi-link rear suspension, and the multi-link rear suspension is assembled on the lower beam 2.

[0063] The above embodiments only exemplarily illustrate the principles and effects of the present utility model, rather than being used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A rear suspension assembly, characterized in that: It comprises an upper beam and a lower beam, wherein the upper beam comprises two upper longitudinal beams; the lower beam comprises two groups of lower longitudinal beams and a plurality of lower cross beams, wherein the plurality of lower cross beams are installed between the two groups of lower longitudinal beams at intervals, and each group of lower longitudinal beams is connected up and down to form a ring structure; The lower beam is installed on the upper longitudinal beam through the lower cross beam, and forms a closed-loop connection structure with the two upper longitudinal beams with an assembly space; The distance between the two upper longitudinal beams is greater than the maximum distance between the two lower cross beams of the lower beam.

2. The rear suspension assembly according to claim 1, characterized in that: The upper beam further comprises a plurality of upper cross beams, and the plurality of upper cross beams are installed between two upper longitudinal beams at intervals.

3. The rear suspension assembly according to claim 1, characterized in that: The upper beam further comprises a plurality of brackets, wherein the plurality of brackets are respectively mounted on the upper longitudinal beam, and the lower beam is mounted on the upper beam through the brackets.

4. The rear suspension assembly according to claim 3, characterized in that: The bracket comprises two outer plates, and the two outer plates are buckled inside and outside to make the bracket present a box-shaped structure.

5. The rear suspension assembly according to claim 3, characterized in that: The bracket comprises an outer plate, and the outer plate is in a triangular diagonal bracing structure.

6. The rear suspension assembly according to claim 3, characterized in that: The bracket comprises an inner plate which is groove-shaped and installed inside the bracket.

7. The rear suspension assembly according to claim 1, characterized in that: The lower beam further comprises at least two auxiliary brackets, and the auxiliary brackets are mounted on each group of the lower longitudinal beams.

8. The rear suspension assembly according to claim 1, characterized in that: The plurality of lower cross beams include a fourth cross beam, a fifth cross beam, and a sixth cross beam, wherein the fifth cross beam is installed between the fourth cross beam and the sixth cross beam, the spacing between the fourth cross beam and the sixth cross beam is X, the spacing between the fifth cross beam and the sixth cross beam is Y, and X and Y satisfy the following relationship: X>2Y.

9. A vehicle, characterized in that: The vehicle is equipped with the rear suspension assembly according to any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle further includes a multi-link rear suspension mounted on the lower beam.

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