CN212643409U

CN212643409U - Hydraulic mount for reducing high-frequency dynamic characteristics

Info

Publication number: CN212643409U
Application number: CN202020819094.6U
Authority: CN
Inventors: 胡培龙
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-03-02
Anticipated expiration: 2030-05-15

Abstract

The utility model provides a reduce hydraulic pressure suspension of high frequency dynamic characteristic, including shell body, trailing arm and hydraulic pressure rubber main part, hydraulic pressure rubber main part and shell body pressure equipment, the shell body is used for connecting the automobile body longeron, the trailing arm is impressed in the hydraulic pressure rubber main part it is used for connecting the power assembly; the hydraulic rubber main body comprises main spring rubber, and a vibration attenuation structure is arranged on the main spring rubber. When power assembly's power is via the trailing arm transmission hydraulic pressure suspension part time, the utility model discloses a hydraulic pressure suspension goes up aluminium core skeleton and drives main spring rubber high-frequency vibration, because of the existence of the vibration attenuation structure on locating main spring rubber this moment, high-frequency vibration's dynamic rigidity is absorbed by this vibration attenuation structure buffering, has consequently effectively reduced the high-frequency vibration that power assembly transmitted automobile body department, reduces automobile body abnormal sound or shake.

Description

Hydraulic mount for reducing high-frequency dynamic characteristics

Technical Field

The utility model relates to an automobile manufacturing technical field, concretely relates to reduce hydraulic pressure suspension of high frequency dynamic characteristic.

Background

In modern vehicle design, the engine is mounted by adopting a suspension support, the suspension can be used for fixing and supporting the power assembly, can bear reciprocating inertia force and moment generated by the rotation and translation mass of the engine in the power assembly, can bear dynamic force acted on the power assembly in the running process of the vehicle, can isolate vibration of a frame or a vehicle body caused by excitation of the engine, and can isolate transmission of the vehicle body vibration to the power assembly caused by uneven road surface and road surface impact on wheels.

The existing engine suspension mainly comprises several forms such as a rubber suspension, an air spring suspension, a hydraulic suspension, a semi-active suspension and an active suspension. Aiming at the hydraulic suspension which is widely applied at present, the bracket arm is connected with the power assembly, and the outer shell is connected with the longitudinal beam of the vehicle body. The vibration of the power assembly is transmitted to the vehicle body after being isolated by the hydraulic rubber main body, and finally transmitted to the steering wheel and the seat guide rail in the vehicle. However, under the condition of large frequency of the existing hydraulic suspension, the dynamic stiffness can obviously rise, the phenomenon is generally called dynamic hardening, and the dynamic hardening can cause obvious rumbling sound or vibration to be generated in the vehicle at the frequency, so that the NVH performance in the vehicle is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a reduce hydraulic pressure suspension (hereinafter referred to as hydraulic pressure suspension) of high-frequency dynamic characteristic, this hydraulic pressure suspension has effectively reduced the high-frequency vibration who is transmitted to automobile body department by power assembly through setting up the vibration attenuation structure, has improved whole car NVH performance.

Specifically, the hydraulic mount for reducing the high-frequency dynamic characteristic comprises an outer shell, a supporting arm and a hydraulic rubber main body, wherein the hydraulic rubber main body is pressed on the outer shell, the outer shell is used for being connected with a longitudinal beam of a vehicle body, and the supporting arm is pressed into the hydraulic rubber main body and is used for being connected with a power assembly; the hydraulic rubber main body comprises main spring rubber, and a vibration attenuation structure is arranged on the main spring rubber.

When the power of the power assembly is transmitted to the hydraulic suspension part through the supporting arm, the upper aluminum core framework of the hydraulic suspension drives the main spring rubber to vibrate at high frequency, and the dynamic rigidity of the high-frequency vibration is buffered and absorbed by the vibration attenuation structure due to the vibration attenuation structure arranged on the main spring rubber, so that the high-frequency vibration transmitted to the vehicle body by the power assembly is effectively reduced, and the abnormal sound or the shake of the vehicle body is reduced.

Further, the vibration damping structure includes a buffering energy absorbing member.

Furthermore, the buffering energy-absorbing piece is a rubber bulge.

Further, the rubber bulge is provided with a plurality of rubber bulges.

Further, the main spring rubber comprises a first rubber main body part and a second rubber main body part arranged on the first rubber main body part;

the second rubber main body part comprises an arc-shaped connecting part and flanges which are arranged on the arc-shaped connecting part and are symmetrically arranged, the first rubber main body part is provided with an inclined connecting side part, and the inclined connecting side part is connected with the two flanges;

the rubber protrusion is provided on the inclined connecting side portion.

When the rubber protrusion is plural, the plural rubber protrusions may be provided on two inclined connecting side portions of the first rubber main body portion so as to equalize the shock absorbing dynamic rigidity.

Further, the rubber protrusion includes a middle body connected to the inclined connection side portion and a rubber buffer head at an end of the middle body.

Furthermore, the rubber buffer head is a rubber buffer ball head. Of course, the rubber cushion head structure is not limited thereto, and may also be a cushion cylinder, for example.

Further, the rubber buffer head and the intermediate body are integrally formed with the first rubber main body part and the second rubber main body part.

The main spring rubber has two main functions, namely bearing static and dynamic loads of the power assembly, so that rigidity and damping are achieved, and the main spring rubber has a piston-like function, so that liquid flows back and forth between the upper liquid chamber and the lower liquid chamber. In the practical application process, the structure of the main spring rubber is determined according to hydraulic characteristic evaluation indexes (generally comprising dynamic stiffness, loss angle and associated frequency).

Compared with the prior art, the utility model provides a reduce hydraulic pressure suspension of high-frequency dynamic characteristic has reduced dynamic characteristic under the high frequency through setting up the vibration attenuation structure, effective buffering has absorbed high-frequency vibration's dynamic rigidity, has avoided hydraulic pressure suspension dynamic hardening situation to appear, has reduced automobile body vibration range and the interior rumbling of car, has improved whole car NVH performance.

Drawings

Fig. 1 is a schematic view of a hydraulic suspension structure for reducing high frequency dynamic characteristics according to the present invention;

FIG. 2 is a schematic structural diagram of a hydraulic rubber body of the hydraulic mount for reducing high frequency dynamic characteristics shown in FIG. 1;

fig. 3 is a graph comparing the dynamic characteristics of the hydraulic mount structure having reduced high frequency dynamic characteristics shown in fig. 1 with those of the conventional hydraulic mount structure.

The figures of the drawings illustrate:

1. a hydraulic rubber main body; 2. an outer housing; 3. a bracket arm; 1.1, main spring rubber; 1.2, arranging an aluminum core framework; 1.3, a lower base; 1.4, pressing a membrane plate; 1.5, a rubber basement membrane; 1.6, a runner framework; 1.7 liquid; 1.8, arranging an aluminum core framework; 1.12, a vibration damping structure; 1.10, a rubber buffer head; 1.11, intermediates.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. appear, the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the utility model provides a reduce hydraulic suspension of high frequency dynamic characteristic, it includes hydraulic rubber main part 1, shell body 2 and trailing arm 3, wherein hydraulic rubber main part 1 is in the same place through the riveting mode pressure equipment with shell body 2, and trailing arm 3 impresses in the hydraulic rubber main part 1 through the interference mode to this trailing arm 3 is connected with the power assembly, and shell body 2 links to each other with the automobile body longeron.

As shown in fig. 2, the hydraulic mount for reducing high frequency dynamic characteristics provided by the present invention has a hydraulic rubber main body 1 including a lower base 1.3, a lower aluminum core frame 1.2 disposed on the lower base 1.3, and an upper aluminum core frame 1.8 fastened to the lower aluminum core frame 1.2; the main spring rubber 1.1 includes a first rubber main body portion 1.91 and a second rubber main body portion 1.94 provided thereon, specifically, the second rubber main body portion 1.94 includes an arc-shaped connecting portion 1.93 and flanges 1.92 provided on both sides of the arc-shaped connecting portion 1.93 and symmetrically provided, the first rubber main body portion 1.91 has an inclined connecting side portion 1.911, the inclined connecting side portion is connected to the flange 1.92, and a vibration damping structure 1.12 is provided on the inclined connecting side portion 1.911.

With further reference to fig. 2, the vibration damping structure 1.12 is in this embodiment a rubber bump comprising an intermediate body 1.11 connected to the inclined connecting side portion 1.911 and a rubber cushion head 1.10 provided at an end of the intermediate body, in particular as shown, the rubber cushion head 1.10 is a rubber cushion ball head. Of course, the specific shape is not limited to this, and the rubber buffer column may be formed integrally with the first rubber body portion and the second rubber body portion.

The first rubber main body part 1.91 is bonded with the lower aluminum core framework 1.2, an accommodating cavity for press-fitting and fixing the upper aluminum core framework 1.8 is formed between the first rubber main body part 1.91 and the second rubber main body part 1.94, and specifically, the upper aluminum core framework 1.8 is bonded and fixed with the first rubber main body part and the second rubber main body part after being pressed in; a diaphragm pressing plate 1.4 is arranged on the lower base 1.3, and a rubber bottom membrane 1.5 is arranged on the diaphragm pressing plate 1.4; a liquid cavity for containing liquid 1.7 is formed between the first rubber main body part 1.91 and the rubber bottom film 1.5, and a runner framework 1.6 is arranged in the liquid cavity to divide the liquid cavity into an upper liquid cavity and a lower liquid cavity.

Of course, the specific arrangement of the vibration damping structure 1.12 is not limited to two in the present embodiment.

When power assembly's power transmitted to liquid rubber main part 1 via trailing arm 3, go up aluminium core skeleton 1.8 and will drive main spring rubber 1.1 high-frequency vibration, the dynamic rigidity of vibration attenuation structure 1.12 buffering absorption main spring rubber 1.1 to the high-frequency vibration of automobile body department has been improved whole car NVH performance to the reduction, compares in prior art, the utility model discloses a hydraulic pressure suspension structure can utmost greatly reduced high frequency dynamic rigidity, avoids appearing dynamic hardening phenomenon, is favorable to optimizing whole car performance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. The hydraulic suspension for reducing the high-frequency dynamic characteristic comprises an outer shell (2), a supporting arm (3) and a hydraulic rubber main body (1), wherein the hydraulic rubber main body (1) is pressed with the outer shell (2), the outer shell is used for connecting a vehicle body longitudinal beam, and the supporting arm (3) is pressed into the hydraulic rubber main body (1) and is used for connecting a power assembly; the hydraulic rubber main body (1) is characterized by comprising main spring rubber (1.1), and a vibration attenuation structure (1.12) is arranged on the main spring rubber (1.1).

2. The hydraulic suspension for reducing high frequency dynamics of claim 1, wherein the vibration dampening structure (1.12) includes a cushioning energy absorber.

3. The hydraulic suspension of claim 2, wherein the energy absorbing bumper is a rubber bump.

4. The hydraulic mount according to claim 3, wherein the rubber protrusion is provided in plurality.

5. The hydraulic mount according to claim 3 or 4, wherein the main spring rubber (1.1) comprises a first rubber main body portion (1.91) and a second rubber main body portion (1.94) provided on the first rubber main body portion (1.91);

wherein the second rubber main body part (1.94) comprises an arc-shaped connecting part (1.93) and flanges (1.92) which are arranged on the arc-shaped connecting part (1.93) and are symmetrically arranged, the first rubber main body part (1.91) is provided with an inclined connecting side part (1.911), and the inclined connecting side part (1.911) is connected with the two flanges (1.92);

the rubber protrusion is provided on the inclined connecting side portion (1.911).

6. The hydraulic mount according to claim 5 wherein the rubber bumps comprise a central body (1.11) connected to the inclined connecting side (1.911) and rubber snubbers (1.10) at the ends of the central body (1.11).

7. Hydraulic suspension for reducing high frequency dynamics according to claim 6, characterized in that the rubber buffer head (1.10) is a rubber buffer bulb.

8. The hydraulic mount according to claim 6 or 7, wherein the rubber bumper head (1.10), the intermediate body (1.11) and the first rubber body part (1.91) and the second rubber body part (1.94) are integrally formed.