CN110758080A

CN110758080A - Suspension mounting structure

Info

Publication number: CN110758080A
Application number: CN201911064917.7A
Authority: CN
Inventors: 徐爽; 付长虎; 陈越
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-02-07
Anticipated expiration: 2039-11-04
Also published as: CN110758080B

Abstract

The invention discloses a suspension mounting structure which comprises a longitudinal beam reinforcing structure fixed on the inner side of a longitudinal beam and a suspension bracket fixed on the outer side of the longitudinal beam. The engine suspension system comprises a longitudinal beam, a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole, wherein the longitudinal beam is sequentially provided with the first mounting hole, the second mounting hole, the third mounting hole and the fourth mounting hole; the second mounting hole and the fourth mounting hole form a second set of mounting holes, and the second set of mounting holes are arranged at mounting positions of the suspension system when the engine torque shaft is close to the rear; the suspension bracket is fixed in the first group of mounting holes or the second group of mounting holes. The suspension mounting structure provided by the invention can meet the mounting position requirements of different power assembly suspension systems while obtaining good NVH performance.

Description

Suspension mounting structure

Technical Field

The application relates to the technical field of automobiles, in particular to a suspension mounting structure.

Background

The arrangement form of the engine has a great influence on the performance of the automobile, and can be simply divided into a transverse engine and a longitudinal engine according to the position relation between the engine and a front axle of the automobile. The transverse engine can not only improve the transmission efficiency, but also reduce the engine compartment and maximally enlarge the driving space, so that the engine arrangement mode is widely used in the front-wheel drive automobile. However, compared with a longitudinal engine, a transverse engine has the advantages that the mounting position of the suspension is not much selected, the torque acting on the power assembly is larger than that acting on the power assembly of the longitudinal engine, and the balance is poor.

The common transverse four-cylinder engine has unbalanced inertia force and torque fluctuation, and the excitation frequency is closer to the natural frequency of a suspension system, so that the mechanism is easy to resonate. At resonance, the vibration of the mechanism can be very severe, which can lead to serious damage. Designing a physically decoupled powertrain suspension system is a common method for achieving resonance reduction in the operating range. Therefore, the suspension system of the transverse engine is reasonably designed, the power assembly suspension system is fully decoupled, and the vibration isolation device has important significance for isolating the vibration transmitted from the engine to the vehicle interior.

The inventors found that the related art has at least the following drawbacks:

the idle torque excitation working condition is used as a main reference working condition for determining each suspension installation position in the early development of the suspension system, and the main excitation is torque excitation. In the design of the prior art, the left suspension and the right suspension should be arranged on the torque shaft as much as possible so as to obtain good idle vibration isolation performance. However, the transverse power assembly lacks a definite symmetrical plane, and the suspension arrangement space is limited, so the current suspension arrangement design can not realize the arrangement scheme usually. And as the automobile design tends to be platformized, when different power assemblies are replaced on the same platform, because the positions of the engine torque shafts of the different power assemblies are different and may be in front or in back, the NVH performance under excitation of the different power assemblies cannot be met by the same suspension system arrangement design, and the redesign consumes cost and time. Meanwhile, the local structural design of the position of the suspension bracket also needs enough rigidity to bear the weight of the power assembly and achieve the designed vibration isolation effect, so that the design space of the suspension arrangement is more limited.

Disclosure of Invention

In order to solve the above problem, the present application provides a suspension mounting structure, which satisfies the mounting position requirements of different powertrain suspension systems while obtaining good NVH performance.

The following technical scheme is specifically adopted in the application:

a suspension mounting structure comprises a longitudinal beam reinforcing structure fixed on the inner side of a longitudinal beam and a suspension bracket fixed on the outer side of the longitudinal beam.

The longitudinal beam comprises a web plate, a first wing plate and a second wing plate which are respectively arranged at two ends of the web plate and are perpendicular to the web plate, and a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole are sequentially formed in the first wing plate. Wherein the first mounting hole and the third mounting hole constitute a first set of mounting holes provided at mounting positions of the suspension system when the engine torque shaft is in front; the second mounting hole and the fourth mounting hole constitute a second set of mounting holes that are provided at mounting locations of the suspension system when the engine torque shaft is rearward.

The longitudinal beam reinforcing structure comprises a first vertical plate fixed on a web plate, wherein the side edge is connected with the first side edge of the first vertical plate, is connected with the first horizontal plate vertical to the first vertical plate and the second horizontal plate vertical to the first vertical plate, and is connected with the second side edge of the first vertical plate, the first side edge and the second side edge are opposite long edges of the first vertical plate, the first horizontal plate and the second horizontal plate are positioned on one side, far away from the web plate, of the first vertical plate, the first horizontal plate is connected with a first wing plate, the second horizontal plate is connected with a second wing plate, and a fifth mounting hole, a sixth mounting hole, a seventh mounting hole and an eighth mounting hole are formed in the first horizontal plate and correspond to the third mounting hole and the fourth mounting hole respectively.

The suspension bracket is configured to be secured to the first wing plate by bolts passing through the first set of mounting holes when the engine torque shaft is forward; alternatively, the suspension bracket is configured to be secured to the first wing panel by bolts passing through the second set of mounting holes when the engine torque shaft is rearward.

Preferably, the stringer additional strengthening still includes that the side is connected with the third side of first riser and is connected with the first curb plate of first riser vertically and the side is connected with the fourth side of first riser and with the second curb plate of first riser vertically, and third side and fourth side are the relative minor face of first riser, and first horizontal plate, first curb plate, second horizontal plate and second curb plate are located the one side of keeping away from the web of first riser and connect gradually.

Preferably, at least one first lightening hole is formed in the first vertical plate, at least one second lightening hole is formed in the first side plate, and at least one third lightening hole is formed in the second side plate.

Preferably, a first clapboard and a second clapboard are further arranged inside the longitudinal beam reinforcing structure, and the first clapboard and the second clapboard are configured to improve the strength of the longitudinal beam reinforcing structure.

Preferably, the first partition includes a first connecting plate, a second connecting plate and a third connecting plate. Wherein the content of the first and second substances,

the first connecting plate is an L-shaped plate and comprises a first plate and a second plate which are perpendicular to each other and fixedly connected, and the second plate is fixed on the first vertical plate.

The second connecting plate is an L-shaped plate, one end of the second connecting plate is connected with the first end of the first connecting plate and comprises a third plate and a fourth plate which are perpendicular to each other and fixedly connected, the third plate is perpendicular to the first plate and connected with the first plate and fixed on the first horizontal plate, and the adjacent ends of the fourth plate and the second plate are overlapped and fixed on the first vertical plate.

The third connecting plate is a rectangular plate, one end of the third connecting plate is connected with the second end of the first connecting plate, two adjacent side edges of the third connecting plate are respectively connected with the first plate and the second plate, the third connecting plate is parallel to the third plate, and the third connecting plate is fixed on the second horizontal plate.

The second connecting plate, the third connecting plate and the second plate are all located on one side, far away from the second partition plate, of the first plate.

The second partition includes a fourth connecting plate, a fifth connecting plate, and a sixth connecting plate. Wherein the content of the first and second substances,

the fourth connecting plate is the L shaped plate, including mutually perpendicular and fixed connection's fifth board and sixth board, and the sixth board is fixed on first riser.

The fifth connecting plate is an L-shaped plate, one end of the fifth connecting plate is connected with the first end of the fourth connecting plate and comprises a seventh plate and an eighth plate which are perpendicular to each other and fixedly connected, the seventh plate is perpendicular to the fifth plate and connected with the fifth plate, the adjacent ends of the eighth plate and the sixth plate are in lap joint, the seventh plate is fixed on the first horizontal plate, and the eighth plate is fixed on the first vertical plate.

The sixth connecting plate is a rectangular plate, one end of the sixth connecting plate is connected with the second end of the fourth connecting plate, two adjacent side edges of the sixth connecting plate are respectively connected with the fifth plate and the sixth plate, the sixth connecting plate is parallel to the seventh plate, and the sixth connecting plate is fixed on the second horizontal plate.

The fifth connecting plate, the sixth connecting plate and the sixth plate are all located on one side, far away from the first partition plate, of the fifth plate.

Preferably, a ninth mounting hole and a tenth mounting hole are further provided on the third plate. The ninth mounting hole corresponds to the fifth mounting hole, and the tenth mounting hole corresponds to the sixth mounting hole; and an eleventh mounting hole and a twelfth mounting hole are further formed in the seventh plate, the eleventh mounting hole corresponds to the eighth mounting hole, and the twelfth mounting hole corresponds to the seventh mounting hole.

Preferably, the welding square nuts are arranged on the inner sides of the ninth mounting hole, the tenth mounting hole, the eleventh mounting hole and the twelfth mounting hole, and the axes of the ninth mounting hole, the tenth mounting hole, the eleventh mounting hole and the twelfth mounting hole are respectively overlapped with the axes of the corresponding welding square nuts.

Preferably, the first connecting plate is provided with at least one fourth lightening hole, the second connecting plate is provided with at least one fifth lightening hole, the fourth connecting plate is provided with at least one sixth lightening hole, and the fifth connecting plate is provided with at least one seventh lightening hole.

Preferably, still be equipped with two strengthening ribs on the riser, the one end and the first horizontal plate of strengthening rib are connected, and the other end and the second horizontal plate of strengthening rib are connected, and two strengthening ribs are established between first baffle and second baffle.

Preferably, a first boss and a second boss are arranged on the first vertical plate, the first boss is arranged between the first side plate and the first partition plate, and one end of the first boss is connected with the first side plate; the second boss is arranged between the second side plate and the second partition plate, and one end of the second boss is connected with the second side plate.

The application provides a suspension mounting structure is through setting up two sets of mounting holes, realizes the quick switch-over of different power assembly suspension system mounted position on the platform, and the installation and the distribution of the suspension of being convenient for save time and cost. The suspension mounting structure provided by the application is used for carrying out the arrangement design of suspension, and the NVH performance requirements of automobiles under the excitation of different power assemblies can be met simultaneously. In addition, the suspension mounting structure that this application provided still includes through modified longeron additional strengthening, can the adaptation with satisfy required structural strength and rigidity behind the suspension mounting structure change for two sets of mounting holes. The suspension mounting structure provided by the application can be used for remarkably improving the dynamic stiffness of the elastic central point of the suspension, meeting the requirement of vibration isolation rate and improving the control stability, durability and NVH performance of a vehicle.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a stringer according to an embodiment of the present application;

FIG. 2 is a schematic view of the mounting of the suspension mounting structure of the embodiment of the present application to a stringer;

FIG. 3 is a schematic view of the mounting of a suspension strut of an embodiment of the present application to a stringer;

FIG. 4 is a schematic structural view of a stringer reinforcement structure according to an embodiment of the present application;

FIG. 5 is a schematic view of the assembly of the first and second bulkheads of the present embodiment of the present application to a stringer reinforcement structure;

FIG. 6 is a schematic structural view of a first separator according to an embodiment of the present application;

FIG. 7 is a schematic structural view of a second separator according to an embodiment of the present application;

FIG. 8 is a comparison graph of the noise response curves of the left ear of the driver before and after optimization according to the embodiment of the present application;

FIG. 9 is a graph comparing the response curves of the right ear noise of the passenger in the front and rear optimized rows according to the embodiment of the present application.

Reference numerals:

1. a stringer reinforcement structure; 11. a first vertical plate; 111. reinforcing ribs; 112. a first boss; 113. a second boss; 114. a first lightening hole; 12. a first horizontal plate; 121. a fifth mounting hole; 122. a sixth mounting hole; 123. a seventh mounting hole; 124. an eighth mounting hole; 13. a second horizontal plate; 14. a first side plate; 141. a second lightening hole; 15. a second side plate; 151. a third lightening hole;

2. a suspension bracket;

3. a stringer; 31. a web; 32. a first wing plate; 321. a first mounting hole; 322. a second mounting hole; 323. a third mounting hole; 324. a fourth mounting hole; 33. a second wing plate;

4. a first separator; 41. a first connecting plate; 411. a first plate; 412. a second plate; 413. a fourth lightening hole; 42. a second connecting plate; 421. a third plate; 422. a fourth plate; 423. a ninth mounting hole; 424. a tenth mounting hole; 425. a fifth lightening hole; 43. a third connecting plate;

5. a second separator; 51. a fourth connecting plate; 511. a fifth plate; 512. a sixth plate; 513. a sixth lightening hole; 52. a fifth connecting plate; 521. a seventh plate; 522. an eighth plate; 523. an eleventh mounting hole; 524. a twelfth mounting hole; 525. a seventh lightening hole; 53. a sixth connecting plate;

6. and welding the square nut.

Detailed Description

In order to make the technical solutions and advantages of the present application clearer, the following will describe the embodiments of the present application in further detail with reference to the accompanying drawings.

When the suspension system is installed on the power assembly, because the vibration of 6 degrees of freedom of the rigid body power assembly is coupled, any excitation along the generalized coordinate of the suspension system can excite a plurality of modes of the system, so that the amplitude of the power assembly during working is increased, and the vibration frequency band is too wide. In order to restrain the displacement of the engine, a suspension element with higher rigidity needs to be used, which can lead to the NVH performance of the whole vehicle to be poor.

The elastic axis is defined as the actual rotational direction of the non-mass rigid body supported by the suspension when a torque acts on the torque axis. The direction of the elastic axis is only related to the mounting position, mounting angle and stiffness of the suspension. If the torque shaft and the elastic shaft are decoupled by a superposition method, the situation can be greatly relieved, and the NVH (Noise, Vibration and Harshness) performance is improved. Therefore, the smaller the distance between the elastic shaft and the torque shaft when the mount is installed, the more advantageous it is to reduce the transmission of engine vibrations. The position of the elastic shaft, and thus the mounting positions of the left and right suspensions, is determined by those skilled in the art based on the position of the torque shaft.

However, as automobile design tends to be flat, for the same platform, torque shafts of different power assemblies are different in position, and engine torque shafts of some power assemblies are arranged in front of each other and engine torque shafts of some power assemblies are arranged in back of each other. The existing suspension mounting structure is difficult to simultaneously enable suspension systems of two or more different power assemblies on the same platform to be located at the optimal mounting position, and further difficult to ensure that automobiles produced by the same platform have good NVH (noise, vibration and harshness) performance. It is costly and time consuming to redesign a new suspension mounting structure.

Based on the defects, the embodiment of the application provides a suspension mounting structure, which comprises a longitudinal beam reinforcing structure 1 fixed on the inner side of a longitudinal beam 3 and a suspension bracket 2 fixed on the outer side of the longitudinal beam 3. The assembly of the stringer stiffening structure 1 and the suspension bracket 2 on the stringer 3 is illustrated with reference to fig. 2 and 3, respectively.

As shown in fig. 1 to 3, the longitudinal beam 3 includes a web 31, and a first wing plate 32 and a second wing plate 33 which are respectively disposed at both ends of the web 31 and are perpendicular to the web 31, and the first wing plate 32 is sequentially provided with a first mounting hole 321, a second mounting hole 322, a third mounting hole 323, and a fourth mounting hole 324. Wherein the first mounting hole 321 and the third mounting hole 323 constitute a first set of mounting holes provided at the mounting positions of the suspension system when the engine torque shaft is forward; the second mounting hole 322 and the fourth mounting hole 324 constitute a second set of mounting holes that are provided at the mounting locations of the suspension system when the engine torque shaft is rearward.

In some embodiments, the longitudinal beam 3 is a stamped sheet metal part, and has a longitudinal section shaped like Contraband, one end of the first wing plate 32 is connected to one end of the web 31, and one end of the second wing plate 33 is connected to the other end of the web 31. In some embodiments, the first set of mounting holes are located at mounting locations adapted to mount a powertrain system forward of the engine torque shaft, and the second set of mounting holes are located at mounting locations adapted to mount a powertrain system rearward of the engine torque shaft. It should be understood that "front" and "rear" are used herein for descriptive purposes only and merely indicate a relative positional relationship, referring to the relative positions of the engine torque shafts in the powertrain in front or rear of the powertrain, and are not to be construed as indicating or implying positional or directional information of the mounting holes. When the flexible shaft is located between the center lines of the two sets of mounting holes, the left and right suspensions are generally mounted in the set of mounting holes with the center lines closer to the flexible shaft.

As shown in fig. 4, the stringer reinforcing structure 1 includes a first vertical plate 11 fixed on a web 31, a first horizontal plate 12 whose side is connected to a first side of the first vertical plate 11 and is perpendicular to the first vertical plate 11, and a second horizontal plate 13 whose side is connected to a second side of the first vertical plate 11 and is perpendicular to the first vertical plate 11, the first side and the second side are opposite long sides of the first vertical plate 11, the first horizontal plate 12 and the second horizontal plate 13 are located on a side of the first vertical plate 11 away from the web 31, the first horizontal plate 12 is connected to a first wing 32, the second horizontal plate 13 is connected to a second wing 33, and a fifth installation hole 121, a sixth installation hole 122, a seventh installation hole 123, and an eighth installation hole 124 corresponding to the first installation hole 321, the second installation hole 322, the third installation hole 323, and the fourth installation hole 324 are provided on the first horizontal plate 12.

In some embodiments, the length and width of the stringer reinforcing structure 1 are increased to improve the dynamic stiffness of the suspension elastic center point, corresponding to the structural design requirement of the two sets of mounting holes. The longitudinal beam reinforcing structure 1 is a sheet metal part formed by stamping, and is connected between the first vertical plate 11 and the web 31, between the first horizontal plate 12 and the first wing plate 32, and between the second horizontal plate 13 and the second wing plate 33 in a welding mode.

In some embodiments, the stringer reinforcing structure 1 is a sheet metal part formed by stamping, and the stringer reinforcing structure 1 is an integrally formed structure.

As shown in fig. 3, the suspension bracket 2 is configured to be fixed to the first wing plate 32 by bolts passing through the first set of mounting holes when the engine torque shaft is forward; in other embodiments, the suspension bracket 2 is configured to be secured to the first wing plate 32 by bolts passing through the second set of mounting holes when the engine torque shaft is rearward.

In some implementations of the embodiment of the present application, as shown in fig. 4, the stringer reinforcing structure 1 further includes a first side plate 14 whose side is connected to the third side of the first riser 11 and perpendicular to the first riser 11, and a second side plate 15 whose side is connected to the fourth side of the first riser 11 and perpendicular to the first riser 11, the third side and the fourth side are opposite short sides of the first riser 1, and the first horizontal plate 12, the first side plate 14, the second horizontal plate 13, and the second side plate 15 are located on one side of the first riser 11 away from the web 31 and connected in sequence.

In some embodiments, as shown in fig. 4, a first bending portion bent inward and parallel to the first side plate 14 and the second side plate 15 is disposed at each of two ends of the first horizontal plate 12, a second bending portion bent inward and parallel to the first side plate 14 and the second side plate 15 is disposed at each of two ends of the second horizontal plate 13, the first side plate 14 and the second side plate 15 are located inside the bending portions, the first bending portion and the second bending portion near the first side plate 14 are respectively lap-welded to two ends of the first side plate 14, and the first bending portion and the second bending portion near the second side plate 15 are respectively lap-welded to two ends of the second side plate 15.

In some implementations of embodiments of the present application, at least one first lightening hole 114 is provided in the first riser 11, at least one second lightening hole 141 is provided in the first side plate 14, and at least one third lightening hole 151 is provided in the second side plate 15.

In some embodiments, on the premise of ensuring that the structural rigidity of the longitudinal beam reinforcing structure 1 is not affected, at least one lightening hole is formed in each of the first vertical plate 11, the first side plate 14 and the second side plate 15, so that the weight and the cost can be reduced. The size and shape of each lightening hole are not necessarily the same, and the positions of the lightening holes are not necessarily symmetrical in the respective structures. For example, in the stringer reinforcement structure 1 shown in fig. 4, three first lightening holes 114 are provided in the first riser 11, one second lightening hole 141 is provided in the first side plate 14, and one third lightening hole 151 is provided in the second side plate 15.

In some implementations of the embodiments of the present application, as shown in fig. 5, a first bulkhead 4 and a second bulkhead 5 are further provided inside the stringer reinforcing structure 1, and each of the first bulkhead 4 and the second bulkhead 5 is configured to improve the strength of the stringer reinforcing structure 1. In some embodiments, the first and second bulkheads 4, 5 are mirror images, and both are evenly stressed on the stringer reinforcement structure 1. First baffle 4 and second baffle 5 all adopt stamping forming's sheet metal component, and above-mentioned two baffles can show the dynamic stiffness who promotes suspension elastic center point, improve the local strength of suspension additional strengthening 1 and longeron 3.

In some implementations of embodiments of the present application, as shown in fig. 6, the first partition 4 includes a first connecting plate 41, a second connecting plate 42, and a third connecting plate 43. The first connecting plate 41 is an L-shaped plate, and includes a first plate 411 and a second plate 412 that are perpendicular to each other and are fixedly connected, and the second plate 412 is fixed on the first vertical plate 11. The second connecting plate 42 is an L-shaped plate, one end of which is connected to the first end face of the first connecting plate 41, and includes a third plate 421 and a fourth plate 422 that are perpendicular to each other and fixedly connected to each other, the third plate 421 is perpendicular to and connected to the first plate 411, and the adjacent ends of the fourth plate 422 and the second plate 412 are overlapped. The third plate 421 is fixed to the first horizontal plate 12, and the fourth plate 422 is fixed to the first vertical plate 11. The third connecting plate 43 is a rectangular plate, one end of which is connected to the second end of the first connecting plate 41, two adjacent sides of the third connecting plate 43 are respectively connected to the first plate 411 and the second plate 412, the third connecting plate 43 is parallel to the third plate 421, and the third connecting plate 43 is fixed on the second horizontal plate 13. The second connecting plate 42, the third connecting plate 43 and the second plate 412 are all located on the side of the first plate 411 away from the second partition 5.

In some embodiments, welded connections are used between the second plate 412 and the first riser 11, between the third plate 421 and the first horizontal plate 12, between the fourth plate 422 and the first riser 11, and between the third connecting plate 43 and the second horizontal plate 13. Wherein, one end of the second plate 412 and one end of the fourth plate 422 overlapped with the second plate are also connected by welding. The lap joint is provided with three layers of welding spots, and the lap joint of the structures comprises a fourth plate 422, a second plate 412 and a first vertical plate 11 from inside to outside in sequence. The three layers of welding points increase the local strength of the first partition plate 4 and the longitudinal beam reinforcing structure 1, and force applied to the suspension can be smoothly transmitted in all directions.

As shown in fig. 7, the second separator 5 includes fourth connecting

plates

51, 52 and a sixth connecting plate 53. The fourth connecting plate 51 is an L-shaped plate, and includes a fifth plate 511 and a sixth plate 512 that are perpendicular to each other and are fixedly connected, and the sixth plate 512 is fixed to the first vertical plate 11. The fifth connecting plate 52 is an L-shaped plate, one end of which is connected to the first end of the fourth connecting plate 51, and includes a seventh plate 521 and an eighth plate 522 that are perpendicular to each other and are fixedly connected, the seventh plate 521 is perpendicular to and connected to the fifth plate 511, the adjacent ends of the eighth plate 522 and the sixth plate 512 are overlapped, the seventh plate 521 is fixed on the first horizontal plate 12, and the eighth plate 522 is fixed on the first vertical plate 11. The sixth connecting plate 53 is a rectangular plate, one end of the sixth connecting plate 53 is connected to the second end of the fourth connecting plate 51, two adjacent sides of the sixth connecting plate 53 are respectively connected to the fifth plate 511 and the sixth plate 512, the sixth connecting plate 53 is parallel to the seventh plate 521, and the sixth connecting plate 53 is fixed to the second horizontal plate 13. The fifth connecting plate 52, the sixth connecting plate 53 and the sixth plate 512 are all located on the side of the fifth plate 511 remote from the first partition plate 4.

In some implementations of the embodiment of the present application, as shown in fig. 6 to 7, a ninth mounting hole 423 and a tenth mounting hole 424 are further provided on the first partition plate 4, the ninth mounting hole 423 corresponds to the fifth mounting hole 121, and the tenth mounting hole 424 corresponds to the sixth mounting hole 122; the second partition 5 is further provided with an eleventh mounting hole 523 and a twelfth mounting hole 524, wherein the eleventh mounting hole 523 corresponds to the eighth mounting hole 124, and the twelfth mounting hole 524 corresponds to the seventh mounting hole 123.

In some embodiments, a ninth mounting hole 423 and a tenth mounting hole 424 are opened on the third plate 421, wherein the ninth mounting hole 423 is opened on a side away from the first plate 411, and the tenth mounting hole 424 is opened on a side close to the first plate 411. An eleventh mounting hole 523 is opened at a side far from the fifth plate 511, and a twelfth mounting hole 524 is opened at a side near the fifth plate 511. The ninth mounting hole 423 and the twelfth mounting hole 524 are a first set of mounting holes, and the tenth mounting hole 424 and the eleventh mounting hole 523 are a second set of mounting holes. In some implementations of the embodiment of the present application, as shown in fig. 5, welding square nuts 6 are disposed inside the ninth mounting hole 423, the tenth mounting hole 424, the eleventh mounting hole 523 and the twelfth mounting hole 524, and axes of the ninth mounting hole 423, the tenth mounting hole 424, the eleventh mounting hole 523 and the twelfth mounting hole 524 coincide with axes of the corresponding welding square nuts 6.

In some embodiments, the four welding square nuts 6 are respectively fixed at the inner sides of the ninth mounting hole 423, the tenth mounting hole 424, the eleventh mounting hole 523, and the twelfth mounting hole 524, so that the mounting steps can be simplified when the suspension bracket 2 is assembled, and the assembly can be facilitated.

In some implementations of the embodiments of the present application, at least one fourth lightening hole 413 is provided on the first connecting plate 41, at least one fifth lightening hole 425 is provided on the second connecting plate 42, at least one sixth lightening hole 513 is provided on the fourth connecting plate 51, and at least one seventh lightening hole 525 is provided on the fifth connecting plate 52.

On the premise of ensuring that the structural rigidity of the first partition plate 4 and the second partition plate 5 is not affected, at least one lightening hole is formed in each of the first connecting plate 41, the second connecting plate 42, the fourth connecting plate 51 and the fifth connecting plate 52, so that the weight and the cost can be reduced. The size and shape of each lightening hole are not necessarily the same, and the positions of the lightening holes are not necessarily symmetrical in the respective structures. For example, in the first partition 4 shown in fig. 6, a fourth lightening hole 413 is provided at the center of the first connecting plate 41, a fourth lightening hole 413 is provided at the joint of the first plate 411 and the second plate 412, a fourth lightening hole 413 is provided at the joint of the first plate 411 and the third plate 421, and a fifth lightening hole 425 is provided at the joint of the third plate 421 and the fourth plate 422. In the second partition wall 5 shown in fig. 7, a sixth lightening hole 513 is provided at the center of the fourth connecting plate 51, a sixth lightening hole 513 is provided at the joint of the fifth plate 511 and the sixth plate 512, a sixth lightening hole 513 is provided at the joint of the fifth plate 511 and the seventh plate 521, and a seventh lightening hole 525 is provided at the joint of the seventh plate 521 and the eighth plate 522.

In some implementations of the embodiment of the present application, as shown in fig. 4, two reinforcing ribs 111 are further disposed on the first vertical plate 11, one end of each reinforcing rib 111 is connected to the first horizontal plate 12, the other end of each reinforcing rib 111 is connected to the second horizontal plate 13, and the two reinforcing ribs 111 are disposed between the first partition plate 4 and the second partition plate 5.

In some embodiments, as shown in fig. 4, two reinforcing beads are provided on each of the first horizontal plate 12 and the second horizontal plate 13, and the two reinforcing beads are connected to both ends of the two reinforcing beads 111 provided on the first vertical plate 11, so that two Contraband-shaped reinforcing beads are formed on the side member reinforcing structure 1. The reinforcing ribs are used to improve the strength and bending rigidity of the stringer reinforcing structure 1.

In some implementations of the embodiments of the present application, as shown in fig. 4, a first boss 112 and a second boss 113 are provided on the first riser 11, the first boss 112 is provided between the first side plate 14 and the first partition plate 4, and one end of the first boss 112 is connected to the first side plate 14; the second boss 113 is provided between the second side plate 15 and the second partition plate 5, and one end of the second boss 113 is connected to the second side plate 15.

In some embodiments, as shown in fig. 4, the cross sections of the first boss 112 and the second boss 113 are both rounded rectangles, and positioning holes are further provided on the first boss 112 and the second boss 113. The above boss structure can further increase the strength and rigidity of the side member reinforcing structure 1.

In the embodiment of the application, the optimized suspension arrangement design is realized through the optimized longitudinal beam reinforcing plate structure, and the vibration noise sensed by front and rear drivers and passengers is optimized in comparison, wherein the optimized front and rear driver left ear noise response curve pair is shown in fig. 8, and the optimized front and rear passenger right ear noise response curve pair is shown in fig. 9. In the comparison graph of the two noise response curves, the noise heard by the left ear of the driver and the noise heard by the right ear of the rear passenger are obviously weakened, and the good optimization effect of the embodiment of the application is reflected.

In the embodiment that the application provided, the length increase of longeron reinforcing plate and two baffles in the longeron extending direction can set up the multiunit mounting hole, installs the suspension support that different power assemblies configured, realizes the quick switch-over of the different power assemblies of platform, and the suspension installation and space allocation of being convenient for save research and development time and cost.

In the embodiment that the application provided, optimized longeron reinforcing plate and the structure and the position relation of baffle, on the basis of guaranteeing safe collision performance, promoted the local dynamic stiffness of structural rigidity intensity and elastic center point, satisfied the requirement of vibration isolation rate, promoted the vehicle control stability ability, durability and NVH performance.

The embodiment can meet the requirements of mounting positions of suspension supports of different power assemblies on the same platform, and enables the torsion direction to be decoupled from other directions by meeting the requirements, so that good idle speed vibration isolation performance is obtained.

In the present application, it is to be understood that the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

The above description is only for facilitating the understanding of the technical solutions of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A suspension mounting structure, characterized by comprising a longitudinal beam reinforcing structure (1) fixed on the inner side of a longitudinal beam (3) and a suspension bracket (2) fixed on the outer side of the longitudinal beam (3), wherein,

the longitudinal beam (3) comprises a web plate (31), a first wing plate (32) and a second wing plate (33) which are respectively arranged at two ends of the web plate (31) and are perpendicular to the web plate (31), and a first mounting hole (321), a second mounting hole (322), a third mounting hole (323) and a fourth mounting hole (324) are sequentially arranged on the first wing plate (32); wherein the first mounting hole (321) and the third mounting hole (323) constitute a first set of mounting holes provided at suspension system mounting positions when the engine torque shaft is forward; the second mounting hole (322) and the fourth mounting hole (324) constitute a second set of mounting holes that are provided at suspension system mounting positions when the engine torque shaft is rearward;

longeron additional strengthening (1) is including fixing first riser (11) on web (31), the side with the first side of first riser (11) connect and with first riser (11) vertically first horizontal plate (12) and side with the second side of first riser (11) connect and with first riser (11) vertically second horizontal plate (13), the first side with the second side does the relative long limit of first riser (11), first horizontal plate (12) with second horizontal plate (13) are located keeping away from of first riser (11) one side of web (31), first horizontal plate (12) with first pterygoid lamina (32) are connected, second horizontal plate (13) with second pterygoid lamina (33) are connected be equipped with on first horizontal plate (12) with first mounting hole (321), A fifth mounting hole (121), a sixth mounting hole (122), a seventh mounting hole (123) and an eighth mounting hole (124) which correspond to the second mounting hole (322), the third mounting hole (323) and the fourth mounting hole (324), respectively;

the suspension bracket (2) is configured to be secured to the first wing plate (32) by bolts passing through the first set of mounting holes when the engine torque shaft is forward; or, the suspension bracket (2)) is configured to be fixed to the first wing plate (32) by bolts passing through the second set of mounting holes when the engine torque shaft is rearward.

2. The suspension mounting structure according to claim 1, wherein the stringer reinforcing structure (1) further comprises a first side plate (14) having sides connected to third sides of the first riser (11) and perpendicular to the first riser (11) and a second side plate (15) having sides connected to fourth sides of the first riser (11) and perpendicular to the first riser (11), the third and fourth sides being opposite short sides of the first riser (1), the first horizontal plate (12), the first side plate (14), the second horizontal plate (13) and the second side plate (15) being located on a side of the first riser (11) remote from the web (31) and being connected in sequence.

3. The suspension mounting structure according to claim 2, wherein at least one first lightening hole (114) is provided on the first riser (11), at least one second lightening hole (141) is provided on the first side plate (14), and at least one third lightening hole (151) is provided on the second side plate (15).

4. The suspension mounting structure according to any of claims 1-3, characterized in that inside the stringer reinforcing structure (1) there is further provided a first bulkhead (4) and a second bulkhead (5), both the first bulkhead (4) and the second bulkhead (5) being configured to increase the strength of the stringer reinforcing structure (1).

5. The suspension mounting structure of claim 4,

the first partition (4) comprises a first connecting plate (41), a second connecting plate (42) and a third connecting plate (43), wherein,

the first connecting plate (41) is an L-shaped plate and comprises a first plate (411) and a second plate (412) which are perpendicular to each other and fixedly connected, and the second plate (412) is fixed on the first vertical plate (11);

the second connecting plate (42) is an L-shaped plate, one end of the second connecting plate is connected with the first end of the first connecting plate (41), the second connecting plate comprises a third plate (421) and a fourth plate (422) which are perpendicular to each other and fixedly connected, the third plate (421) is perpendicular to and connected with the first plate (411), the adjacent ends of the fourth plate (422) and the second plate (412) are overlapped, the third plate (421) is fixed on the first horizontal plate (12), and the fourth plate (422) is fixed on the first vertical plate (11);

the third connecting plate (43) is a rectangular plate, one end of the third connecting plate is connected with the second end of the first connecting plate (41), two adjacent side edges of the third connecting plate (43) are respectively connected with the first plate (411) and the second plate (412), the third connecting plate (43) is parallel to the third plate (421), the third connecting plate (43) is fixed on the second horizontal plate (13),

the second connecting plate (42), the third connecting plate (43) and the second plate (412) are all positioned on one side of the first plate (411) far away from the second partition (5);

the second partition (5) comprises a fourth connecting plate (51), a fifth connecting plate (52) and a sixth connecting plate (53), wherein,

the fourth connecting plate (51) is an L-shaped plate and comprises a fifth plate (511) and a sixth plate (512) which are perpendicular to each other and fixedly connected, and the sixth plate (512) is fixed on the first vertical plate (11);

the fifth connecting plate (52) is an L-shaped plate, one end of the fifth connecting plate is connected with the first end of the fourth connecting plate (51), the fifth connecting plate comprises a seventh plate (521) and an eighth plate (522) which are perpendicular to each other and fixedly connected, the seventh plate (521) is perpendicular to and connected with the fifth plate (511), the adjacent ends of the eighth plate (522) and the sixth plate (512) are overlapped, the seventh plate (521) is fixed on the first horizontal plate (12), and the eighth plate (522) is fixed on the first vertical plate (11);

the sixth connecting plate (53) is a rectangular plate, one end of the sixth connecting plate is connected with the second end of the fourth connecting plate (51), two adjacent side edges of the sixth connecting plate (53) are respectively connected with the fifth plate (511) and the sixth plate (512), the sixth connecting plate (53) is parallel to the seventh plate (521), and the sixth connecting plate (53) is fixed on the second horizontal plate (13),

the fifth connecting plate (52), the sixth connecting plate (53) and the sixth plate (512) are all located on one side of the fifth plate (511) far away from the first partition plate (4).

6. The suspension mounting structure according to claim 5, wherein a ninth mounting hole (423) and a tenth mounting hole (424) are further provided on the third plate (421), the ninth mounting hole (423) corresponding to the fifth mounting hole (121), the tenth mounting hole (424) corresponding to the sixth mounting hole (122); an eleventh mounting hole (523) and a twelfth mounting hole (524) are further formed in the seventh plate (521), the eleventh mounting hole (523) corresponds to the eighth mounting hole (124), and the twelfth mounting hole (524) corresponds to the seventh mounting hole (123).

7. The suspension mounting structure according to claim 6, wherein a welding square nut (6) is provided inside each of the ninth mounting hole (423), the tenth mounting hole (424), the eleventh mounting hole (523) and the twelfth mounting hole (524), and axes of the ninth mounting hole (423), the tenth mounting hole (424), the eleventh mounting hole (523) and the twelfth mounting hole (524) coincide with axes of the welding square nuts (6) corresponding thereto, respectively.

8. The suspension mounting structure according to any one of claims 5-7, wherein at least one fourth lightening hole (413) is provided on the first connecting plate (51), at least one fifth lightening hole (425) is provided on the second connecting plate (42), at least one sixth lightening hole (513) is provided on the fourth connecting plate (51), and at least one seventh lightening hole (525) is provided on the fifth connecting plate (52).

9. The suspension mounting structure according to claim 8, wherein two reinforcing ribs (111) are further provided on the first vertical plate (11), one end of each reinforcing rib (111) is connected to the first horizontal plate (12), the other end of each reinforcing rib (111) is connected to the second horizontal plate (13), and the two reinforcing ribs (111) are provided between the first partition plate (4) and the second partition plate (5).

10. The suspension mounting structure according to any one of claims 8-9, wherein a first boss (112) and a second boss (113) are provided on the first riser (11), the first boss (112) is provided between the first side plate (14) and the first partition plate (4), and one end of the first boss (112) is connected to the first side plate (14); the second boss (113) is arranged between the second side plate (15) and the second partition plate (5), and one end of the second boss (113) is connected with the second side plate (15).