CN213892164U - Lifting lug structure of automobile exhaust system - Google Patents

Abstract

The utility model relates to a lifting lug structure of an automobile exhaust system, which comprises a framework and lifting lugs, wherein the lifting lugs are arranged on the framework, the framework is provided with a main lifting lug mounting hole and an auxiliary lifting lug mounting hole, the lifting lugs are composed of a main lifting lug and an auxiliary lifting lug which are made of rubber, and the rigidity strength of the main lifting lug is greater than that of the auxiliary lifting lug; the main lifting lug is conical and is provided with a first central through hole, and the auxiliary lifting lug is cylindrical and is provided with a second central through hole; the main lifting lug is arranged on the main lifting lug mounting hole, and the auxiliary lifting lug is arranged on the auxiliary lifting lug mounting hole. The utility model discloses the vibration isolation frequency band is wideer, makes the whole vibration isolation performance of whole car reinforcing, solves the problem that current automobile exhaust system can't the centering low frequency noise carry out effective vibration isolation.

Description

Lifting lug structure of automobile exhaust system

Technical Field

The utility model relates to an automobile exhaust system installs, concretely relates to automobile exhaust system lug structure.

Background

Currently, with the continuous improvement of automobile power performance, the requirements on the sound quality of an automobile engine and the whole automobile are higher and higher, and especially the increasingly prominent noise problem is solved. The noise mainly takes engine noise as a source, automobile parts such as an automobile body and the like are taken as transmission paths, the noise is mainly concentrated in a medium-low frequency band and is easy to be sensed by a user, one of the main transmission paths is an attachment point of an exhaust system and the automobile body, particularly two exhaust hooks which are closest to the engine are distributed on two sides of an inlet pipe of a front silencer in a symmetrical mode under the general condition, and the vibration of the driving side of the front silencer is the largest in all the exhaust hooks. Therefore, it is very important to control the transmission path to improve the noise problem in the vehicle caused by the vibration of the middle and low frequency bands.

At present, the lifting lug of the front silencer mainly has the following forms: the lifting device comprises independent silica gel lifting lugs, independent rubber lifting lugs, framework type silica gel lifting lugs and framework type rubber lifting lugs. The independent silica gel lifting lug and the independent rubber lifting lug are the most common, the dynamic stiffness of the independent silica gel lifting lug and the independent rubber lifting lug is generally within an acceptable range at a low-frequency section, but the dynamic stiffness is gradually increased after the low-frequency section is transited to a medium-frequency section, the increase trend is steep, a formant appears quickly, and the vibration isolation effect of the medium-frequency section is not facilitated. For the frame type silica gel lifting lugs and the frame type rubber lifting lugs, the vehicle type is adopted occasionally, the lifting lugs on two sides are connected into a whole through a metal framework, so that the vibration isolation amount is improved, but the installation point of the framework and a vehicle body (an auxiliary frame or the vehicle body) is always in rigid connection, the optimal frequency band for vibration isolation cannot be further expanded, and the broadband vibration problem is not solved favorably.

Therefore, the problem to be solved by those skilled in the art is to design an exhaust system vibration isolation lifting lug for effectively isolating middle and low frequency noise.

Disclosure of Invention

The utility model aims at providing an automobile exhaust system lug structure solves the problem that current automobile exhaust system can't the centering low frequency noise carry out effective vibration isolation.

The utility model discloses a lifting lug structure of an automobile exhaust system, which comprises a framework and lifting lugs, wherein the lifting lugs are arranged on the framework and comprise main lifting lugs and auxiliary lifting lugs made of rubber, and the rigidity strength of the main lifting lugs is greater than that of the auxiliary lifting lugs; the main lifting lug is conical and is provided with a first central through hole, and the auxiliary lifting lug is cylindrical and is provided with a second central through hole; the main lifting lug is arranged on the main lifting lug mounting hole, and the auxiliary lifting lug is arranged on the auxiliary lifting lug mounting hole.

Furthermore, the two main lifting lugs and the two auxiliary lifting lugs are arranged side by side, and the two main lifting lugs are positioned in the middle of the framework,

the two auxiliary lifting lugs are positioned at two sides.

Furthermore, an X-shaped reinforcing rib is arranged on the framework and located between the two main lifting lugs.

Furthermore, the outer part of the auxiliary lifting lug is wrapped by an iron sheet, and a pipe sleeve with threads is arranged inside the auxiliary lifting lug.

Further, the framework is made of an aluminum alloy material.

The utility model has the advantages that: the main lifting lug and the auxiliary lifting lug are arranged on the framework, the main lifting lug is connected with the exhaust hook, the auxiliary lifting lug is connected with the auxiliary frame, the framework is in flexible connection with the auxiliary frame, vibration can be reduced, the dynamic stiffness of two-stage vibration isolation type framework lifting lug main vibration isolation rubber is lower than that of a conventional rubber lifting lug, the vibration isolation effect is better, the framework lifting lug is designed to be two-stage vibration isolation, the two-stage vibration isolation is a series system, the stiffness of the whole system is further reduced, the modal frequency of the system is increased, a resonance peak moves backwards, the optimal vibration isolation frequency band is widened, and the vibration isolation performance of the system in the whole middle-low frequency band is greatly improved. Meanwhile, the framework structure is adopted, so that the composite material is firmer and more durable and has higher durability. The utility model provides a current automobile exhaust system can't the centering low frequency noise carry out the problem of effective vibration isolation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the skeleton.

Fig. 3 is a schematic structural view of the main lifting lug.

Fig. 4 is a schematic structural view of the auxiliary lifting lug.

Fig. 5 is a connection diagram of the application of the present invention.

Fig. 6 is a schematic view of the structure of the exhaust system.

Fig. 7 is a schematic structural view of the subframe hook.

In the figure: 1-framework, 11-main lifting lug mounting hole, 12-auxiliary lifting lug mounting hole and 13-reinforcing rib;

2-main lifting lug, 21-first central through hole;

3-auxiliary lifting lug, 31-second central through hole;

4-exhaust system, 41-exhaust hook, 42-exhaust pipe, 43-first connecting bracket;

5-subframe hook, 51-second linking bridge.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

referring to fig. 1-7, the lifting lug structure of the automobile exhaust system comprises a framework 1 and lifting lugs, wherein the lifting lugs are installed on the framework 1 and comprise a main lifting lug 2 and an auxiliary lifting lug 3 which are made of rubber, and the natural frequency of a system formed by the main lifting lug 2, the auxiliary lifting lug 3 and the framework 1 can be further reduced, so that the vibration isolation performance of the system is better; the main lifting lug 2 is conical and is provided with a first central through hole 21, and the auxiliary lifting lug 3 is cylindrical and is provided with a second central through hole 31; the main lifting lug installing hole 11 and the auxiliary lifting lug installing hole 12 are formed in the framework 1, the main lifting lug 2 is arranged on the main lifting lug installing hole 11, the auxiliary lifting lug 3 is arranged on the auxiliary lifting lug installing hole 12, and the main lifting lug and the auxiliary lifting lug are fixed on the framework through vulcanization.

When the exhaust system is installed, the end part of an exhaust hook 41 on the exhaust system 4 penetrates through the first central through hole 21 of the main lifting lug 2 and is connected with the framework 1 through the main lifting lug 2; the auxiliary frame is connected with the framework 1 through the auxiliary lifting lugs 3, the auxiliary frame hook 5 is arranged at the corresponding position on the auxiliary vehicle, and the auxiliary frame hook 5 penetrates through the second center through hole 31 of the auxiliary lifting lug 3 and is connected with the framework 1 through the auxiliary lifting lug 5. Thus, the framework 1 and the auxiliary frame are flexibly connected. The exhaust hook 41 is connected to an exhaust pipe 42 of the exhaust system 4 via a first connecting bracket 43, and the subframe hook 5 is connected to a subframe via a second connecting bracket 51. When the engine transmits excitation vibration to the exhaust hook 41 along the exhaust passage 21, the exhaust hook 41 is triggered to vibrate synchronously, then the excitation vibration is transmitted to the framework 1 through the main lifting lug 2 and then transmitted to the auxiliary frame through the auxiliary lifting lug 3, and two-stage damping is achieved, so that vibration energy transmitted to the auxiliary frame hook 5 from the auxiliary lifting lug 3 is greatly attenuated, and the whole low-medium frequency broadband vibration is effectively avoided. The reinforcing ribs 13 of the framework 1 increase the strength and durability of the framework 1.

Further, main lug 2 and vice lug 3 are two and set up side by side, and two main lug 2 is located the middle of skeleton 1, and two pair lugs 3 are located both sides. Two exhaust hooks 41 on the exhaust system 4 penetrate through the central hole of the main lifting lug 2 to be connected with the main lifting lug, and the two sides of the framework are connected with the auxiliary frame through the auxiliary lifting lugs 3 to increase the stability of the framework.

Furthermore, an X-shaped reinforcing rib 13 is arranged on the framework 1, and the reinforcing rib 13 is positioned between the two main lifting lugs 2. Thus, the strength of the framework is enhanced, and the service life of the framework is prolonged.

Further, the outer portion of the auxiliary lifting lug 3 is wrapped by an iron sheet, a pipe sleeve with threads is arranged inside the auxiliary lifting lug, and the pipe sleeve is fixedly connected with the auxiliary lifting lug 3 through vulcanization. Because the auxiliary lifting lug 3 is mainly used for connection and needs a certain rigidity requirement, the iron sheet is wrapped outside the auxiliary lifting lug 3, so that the auxiliary lifting lug 3 has connection rigidity and shock absorption performance; set up the pipe box that has the screw thread inside and make its be connected more convenient with the sub vehicle frame, set up the screw thread on sub vehicle frame couple 5, after sub vehicle frame couple 5 passed the sleeve pipe, its tip was screwed up with the nut, made its connection more reliable.

Further, the framework 1 is made of an aluminum alloy material. The material is easy to obtain and process, and the cost is saved.

Claims (5)

1. A lifting lug structure of an automobile exhaust system comprises a framework (1) and lifting lugs, wherein the lifting lugs are installed on the framework (1), and the lifting lug structure is characterized in that the lifting lugs are composed of a main lifting lug (2) and an auxiliary lifting lug (3) which are made of rubber, and the rigidity strength of the main lifting lug (2) is greater than that of the auxiliary lifting lug (3); the main lifting lug (2) is conical and is provided with a first central through hole (21), and the auxiliary lifting lug (3) is cylindrical and is provided with a second central through hole (31); the lifting lug structure is characterized in that a main lifting lug mounting hole (11) and an auxiliary lifting lug mounting hole (12) are formed in the framework (1), the main lifting lug (2) is arranged on the main lifting lug mounting hole (11), and the auxiliary lifting lug (3) is arranged on the auxiliary lifting lug mounting hole (12).

2. The lifting lug structure of the automobile exhaust system according to claim 1, wherein the main lifting lug (2) and the auxiliary lifting lug (3) are arranged side by side, the two main lifting lugs (2) are positioned in the middle of the framework (1), and the two auxiliary lifting lugs (3) are positioned on two sides.

3. The lifting lug structure of the automobile exhaust system according to claim 2, wherein the framework (1) is provided with an X-shaped reinforcing rib (13), and the reinforcing rib (13) is positioned between the two main lifting lugs (2).

4. The lug structure of the automobile exhaust system according to any one of claims 1 to 3, wherein the secondary lug (3) is externally wrapped with iron sheet and internally provided with a threaded socket.

5. The shackle structure for an automobile exhaust system according to claim 4, characterised in that the frame (1) is made of an aluminium alloy material.

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