KR19980078378A - Automotive engine mounting - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine mounting for automobiles for mounting an engine to a vehicle body, and includes a dustproof rubber having a through hole therein and fitted with an inner pipe and an outer pipe inside and outside, and welded to an outer pipe of the dustproof rubber. In the engine mounting for an automobile comprising an engine bracket which is fastened to the anti-vibration rubber by a bolt passing through the inner pipe of the anti-vibration rubber inserted into the vehicle body bracket, which has a U-shape, the end of the inner pipe is an annular washer Is press-fitted to prevent the dent of the contact portion of the engine bracket due to the torque of the bolt and to prevent wear corrosion due to the potential difference corrosion, there is an advantage that can prevent the bolt loosening even when using the aluminum engine bracket. .

Description

Automotive engine mounting

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automotive engine mounting for mounting an engine to a vehicle body, and more particularly, to an automobile engine mounting having a washer for preventing bolt loosening when an aluminum engine bracket is used.

The engine of the car generates a lot of vibration and noise when driving. Therefore, when the engine is mounted on the vehicle body, it is very important that vibrations and noise generated from the engine are transmitted to the vehicle body so as not to impair the ride comfort.

Typically, the engine is equipped with a plurality of engine brackets installed on the engine itself, and the engine bracket is mounted to the vehicle body by being coupled to the vehicle body bracket installed on the frame of the vehicle body, which includes vibrations generated from the engine as described above. Engine mounting with a dustproof structure is used to reduce the transmission of noise to the bodywork.

Such an automotive engine mounting is shown in FIG.

As shown, the engine mounting for automobiles includes an engine bracket 2 fixed to an engine (not shown), a body bracket 1 and an engine bracket 2 and a body bracket 1 fixed to a body frame (not shown). It is composed of a dustproof rubber (not shown) installed between the) to reduce the vibration and noise generated from the engine.

The anti-vibration rubber is an annular member having a through hole formed in the center, and the outer circumferential surface is fitted with the outer pipe 3 enclosing the outer circumferential surface, and the inner pipe 4 is fitted with the through hole. This anti-vibration rubber is joined to the vehicle body bracket 1 by welding the outer pipe 3 to the vehicle body bracket 1, and inserted into the engine bracket 2 as shown in Figs. 5) is fixed to the engine bracket 2 by fastening with the nut 6 through the fastening hole of the engine bracket 2 and the inner pipe 4.

The fixing structure of the anti-vibration rubber and the engine bracket 2 will be described in more detail as follows.

Both ends of the inner pipe 4 extend slightly outside the through-holes of the anti-vibration rubber, and as shown in FIG. 2A, the anti-vibration rubber inserted into the external pipe 3 is inserted into the engine bracket 2 only. In Fig. 1, a tolerance of approximately 1 mm is formed between the end of the inner pipe 4 and the engine bracket 2. In this state, the anti-vibration rubber is fixed to the engine bracket 2 by fastening the bolt 5 through the fastening hole of the engine bracket 2 and the inner pipe 4 and the nut 6 on the opposite side. At this time, the end of the inner pipe 4 and the engine bracket 2 are tightly adhered to each other by the fastening torque of the bolt 5 as shown in FIG. 2B.

In the engine mounting as described above, the inner pipe and the engine bracket are commonly used cast iron material, but in recent years, the material of the engine bracket is changed from cast iron to aluminum to reduce the weight and improve the vibration and noise reduction effect. By the way, when the material of the engine bracket is cast iron in the engine mounting as described above did not have any problem, when the material of the engine bracket is aluminum, the following problems occurred.

That is, when the vibration-proof rubber and the engine bracket are fastened, a phenomenon in which the contact portion of the engine bracket that is in contact with the end of the inner pipe is recessed by the fastening torque of the bolt occurs, and if the contact vibration is applied for a long time by the operation of the engine, the potential difference Abrasion corrosion by galvanic corrosion occurs. In this case, there is a problem that the bolt is loosened due to insufficient fastening force between the inner pipe and the engine bracket. In order to solve this problem, a general washer may be used, but in this case, there is a problem in that the assembly is deteriorated.

The present invention has been devised to solve the above problems, it is pressed into the end of the inner pipe to expand the contact area of the engine bracket to eliminate the phenomena and wear corrosion phenomenon of the automotive engine that can prevent the bolt loosening The purpose is to provide mounting.

1 is a perspective view of a typical engine mounting.

2A and 2B are plan views showing the fastening structure of the anti-vibration rubber and the engine bracket in the conventional engine mounting.

Figure 2A shows the state before tightening the bolt and nut,

Figure 2B shows a bolt and nut tightened.

Figure 3 is a perspective view of the main part showing the main part of the engine mounting according to the present invention.

Explanation of symbols for the main parts of the drawings

1: body bracket 2: engine bracket

3: outer pipe 4: inner pipe

4a: Jaw 5: Bolt

6: nut 7: round washer

The purpose is to have a through hole therein, and to have an inner and outer antivibration rubber fitted with an inner pipe and an outer pipe, a body bracket to be welded to the outer pipe of the antivibration rubber, and a U shape. In an automotive engine mounting comprising an engine bracket fastened to an anti-vibration rubber by a bolt penetrating an internal pipe of an anti-vibration rubber to be inserted, an annular washer is press-fitted to the end of the internal pipe to contact the engine bracket by the torque of the bolt. It is achieved by the engine mounting for a vehicle according to the invention, characterized in that it is possible to prevent wear corrosion due to depression and potential difference corrosion.

(Example)

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

In describing the embodiment according to the present invention, the same reference numerals are used for the same components as those of the related art and will not be described again.

3 shows the main part of an engine mounting for an automobile according to the invention.

As shown, the inner pipe 4 extending slightly to both sides of the anti-vibration rubber (not shown) has a stepped jaw 4a at the end. The jaw 4a is approximately 2 mm long and has a thickness of about 2 to 3 mm thinner than the rest of the inner pipe 4. An annular washer 7 having a thickness of about 3 mm is press-fitted to this jaw 4a. This annular washer 7 has an outer diameter about twice as large as the diameter of the inner pipe 4.

Automotive engine mounting according to the present invention having the configuration as described above has a large contact area between the annular washer 7 and the engine bracket (2) of the bolt (not shown) at the time of fastening the anti-vibration rubber and the engine bracket (not shown) Even by the torque, the contact portion of the aluminum engine bracket is not recessed, and no galvanic corrosion due to contact vibration occurs. Therefore, the fall of the fastening force of a bolt can be prevented and a bolt can be prevented from loosening.

Automotive engine mounting according to the present invention as the washer is pressed in both ends of the inner pipe, the contact area of the engine bracket of aluminum-based engine bracket depression phenomenon and a long time because the contact area is increased when the vibration-proof rubber and the engine bracket is fastened There is an advantage that the wear corrosion phenomenon due to the potential difference corrosion does not occur during contact vibration. Therefore, the phenomenon of bolt loosening can be prevented. In addition, there is an advantage that the assembly is improved compared to using a general washer.

Claims (2)

An anti-vibration rubber having a through hole therein and fitted with an inner pipe and an outer pipe respectively, an automobile body bracket welded to the outer pipe of the anti-vibration rubber, and a U-shaped shape and the inside of the anti-vibration rubber inserted therein In an automotive engine mounting comprising an engine bracket fastened to an anti-vibration rubber by bolts passing through a pipe, an annular washer is press-fitted to the end of the inner pipe, so that the contact part of the engine bracket is depressed due to the torque of the bolt and potential corrosion is caused. Automotive engine mounting, characterized in that to prevent wear corrosion caused by. 2. The engine mounting of claim 1, wherein the inner pipe has a stepped jaw at the end into which the annular washer is pressed.