KR20140132446A

KR20140132446A - Hydraulic sealed type bush

Info

Publication number: KR20140132446A
Application number: KR20130051596A
Authority: KR
Inventors: 차승환
Original assignee: 현대모비스 주식회사
Priority date: 2013-05-08
Filing date: 2013-05-08
Publication date: 2014-11-18
Also published as: KR102035354B1

Abstract

Disclosed is a hydro-bush with tunable dynamic attributes. The hydro-bush according to an embodiment of the present invention includes: inner pipes which are coupled to each other by penetrating a first plunger; outer pipes storing the inner pipes on the inside; and an elastic body which is formed between the inner pipe and the outer pipe and has a liquid chamber. An assembly hole is formed on the lower end of the first plunger in a predetermined size.

Description

[0001] HYDRAULIC SEALED TYPE BUSH [0002]

The present invention relates to a hydro-bush, and more particularly, to a hydro-bush capable of tuning various dynamic characteristics.

In order to attenuate vibration of a vehicle, it is generally installed between a vibration generating portion such as an engine or a transmission of a vehicle and a vehicle body. In order to prevent vibrations and impact from being transmitted to the vehicle body by controlling vibration and impact, various types of bushes ) Are used. Among these bushes, the bush formed by using the viscosity of the fluid and the characteristics of the rubber is briefly referred to as a hydraulic sealed type bush.

FIG. 1 is a sectional view schematically showing a conventional hydro bushing 10, and FIG. 2 is a view schematically showing a cross section when the hydro bushing 10 of FIG. 1 is engaged.

1 and 2, the hydro bushing 10 includes an inner pipe 11 formed integrally with the plunger 11a, an outer pipe 12 accommodating the inner pipe 11 therein, And a stopper 14 disposed between the inner pipe 11 and the outer pipe 12 and having a liquid chamber formed therein. The stopper 14 may be provided on the front or rear surface of the inner pipe 11, May be additionally combined.

The hydro bushing 10 constructed as described above is designed in such a manner that the plunger 11a is integrated with the inner pipe 11 and is formed through a vulcanization process so that the liquid chamber can be filled with fluid, 13) and the outer pipe (12).

At this time, since the plunger 11a is disposed in the liquid chamber formed inside the dispenser 13, it has a mass effect due to the fluid, so that the dynamic characteristic is reduced in the high frequency band, And performs a stopping function on the main direction behavior of the bush. Therefore, the characteristics of the hydro-bush 10 depend on the shape and the length (portion A in Fig. 2) of the plunger 11a, the plunger 13, and the like.

However, in the related art, the inner pipe 11 and the plunger 11a are integrally manufactured, and the characteristics of the hydro-bush 10 can not be tuned, which limits the overall shape design.

Embodiments of the present invention provide a hydro bush capable of tuning dynamic characteristics.

According to an aspect of the present invention, there is provided an internal combustion engine including: an inner pipe coupled through a first plunger; an outer pipe accommodating the inner pipe; and an elastic body formed between the inner pipe and the outer pipe, And a lower end of the first plunger is provided with an assembly hole having a predetermined size.

The first plunger may further include a second plunger fitted to the assembly hole of the first plunger.

In addition, the assembly hole may have a space formed therein, the second plunger may include a head portion which is seated in the space, a column portion integrally formed with the head portion, and a bottom portion integrally formed with the column portion can do.

Further, the second plunger may be an elastic body.

The first plunger may be formed by coupling a front member and a rear member, each having an assembly groove at a lower end thereof, and the assembly hole of the front member and the rear member may form the assembly hole.

The inner pipe may further include a stopper coupled to at least one of a front surface and a rear surface of the inner pipe.

The embodiments of the present invention can tune the dynamic characteristics of the hydro-bushing by forming an assembly hole at the lower end of the main plunger and adjusting the height of the auxiliary plunger fitted to the assembly hole.

Therefore, it is possible to flexibly and flexibly implement the hydro-bush having various characteristics.

1 is a sectional view schematically showing a conventional hydro bush.
Fig. 2 is a schematic view showing a cross section when the hydro-bush of Fig. 1 is engaged. Fig.
3 is an exploded view schematically illustrating a hydro bush according to one embodiment of the present invention.
Fig. 4 is a view schematically showing the shape of the first plunger in the hydro-bush of Fig. 3;
FIG. 5 is a schematic view showing a cross section when the hydro-bush of FIG. 3 is engaged. FIG.

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

3 is a sectional view schematically showing a hydro bushing 100 according to an embodiment of the present invention.

3, the hydro bushing 100 includes an inner pipe 110 coupled to the first plunger 111, an outer pipe 120 for receiving the inner pipe 110 therein, 110 and an outer pipe 120, and a liquid chamber is formed. At this time, an assembly hole 112 having a predetermined size is formed at a lower end of the first plunger 111, and a second plunger 140 is fitted to the assembly hole 112.

The hydro bush 100 is installed in a front lower arm (not shown) of a vehicle suspension system, for example, and is elastically deformed in a radial direction by vibrations transmitted from a wheel of the wheel, thereby attenuating vibrations. In addition, since the automotive suspension system is composed of a plurality of arms as well as the front lower arm, the hydro-bushing 100 can couple the two arms together.

At this time, the inner pipe 110 is inserted and coupled with the first coupling, and the outer pipe 120 is inserted with the second coupling inserted. Wherein the first combination and the second combination may be the ends of an arm. The elastic body 130 disposed between the inner pipe 110 and the outer pipe 120 is elastically deformed in the radial direction by the vibration acting on the first and second joints from the wheel of the vehicle and functions to attenuate vibration .

Hereinafter, each configuration will be described in detail.

The inner pipe 110 is engaged with the first combination as described above with being disposed in association with the first plunger 111. [ The first plunger 111 is disposed inside the liquid chamber, causing a mass effect by the fluid to reduce the dynamic characteristics in the high frequency band and a stopping function for the main directional behavior of the bush when the vehicle is in motion.

3, the first plunger 111 may be formed as a square frame having an opening (not shown) through which the inner pipe 110 is inserted and coupled. Specifically, the opening may be formed in a shape similar to a trapezoid, and the upper side may be formed to be longer than the lower side by a predetermined length (see FIG. 3).

At the lower end of the first plunger 111, an assembly hole 112 is formed. The assembly hole 112 may be formed corresponding to the insertion portion of the second plunger 140, where the second plunger 140 is inserted and fastened. The size of the assembly hole 112 is not specified, and it is sufficient that the second plunger 140 can be inserted and fastened as described above. For this, a space may be formed in the assembly hole 112 so that the second plunger 140 can be fastened.

FIG. 4 is a view schematically showing the shape of the first plunger 111 in the hydro bushing 100 of FIG. Referring to FIG. 4, the first plunger 111 may be formed by coupling a front member 111a and a rear member 111b, each having an assembly groove 111c at a lower end thereof. At this time, the assembly groove 111c of the front member 111a and the assembly groove 111c of the rear member 111b form the assembly hole 112.

4A shows a front member 111a and a rear member 111b in which an assembly groove 111c is formed at a lower end, respectively. In FIG. 4B, a front member 111a and a rear member 111b are combined In FIG. 4C, an inner pipe 110 is coupled to an opening of a first plunger 111 formed by coupling a front member 111a and a rear member 111b. At this time, an assembly hole 112 is formed in the lower end of the first plunger 111 by an assembly groove 111c.

The shape of the first plunger 111 may be formed through a vulcanization process. The vulcanization process may be referred to as a vulcanization process by a well-known process generally used in the rubber product manufacturing process. Such a vulcanization process is a process for converting a plastic material into an elastic material, and a description of a specific process content will be omitted.

Referring again to FIG. 3, the outer pipe 120 is coupled with the second coupling, as described above, to accommodate the inner pipe 110 therein. The outer pipe 120 is formed in a pipe shape larger than the outer diameter of the inner pipe 110 and the inner pipe 110 is accommodated in the outer pipe 120.

The elastic body 130 is formed between the inner pipe 110 and the outer pipe 120 and serves to attenuate the vibration as described above. The elastic body 130 may be formed so as to form a liquid chamber therein, and the shape of the liquid chamber may vary, and may be formed in a known shape, so that a detailed description thereof will be omitted. The material of the elastic body 130 is not particularly limited as long as it is a material having elasticity to some extent, and may be a material such as rubber.

The hydro bushing 100 according to an embodiment of the present invention further includes a second plunger 140 formed with an assembly hole 112 at a lower end of the first plunger 111 and fitted into the assembly hole 112 As a technical feature. The second plunger 140 functions to tune the hydro bushing 100 so as to realize various dynamic characteristics by adjusting the length of the stopper.

The second plunger 140 may be formed to be fitted into the assembly hole 112. 3, the second plunger 140 includes a head portion 142, a column portion 144 integrally formed with the head portion 142, and a bottom portion 144 integrally formed with the column portion 144. [ (Not shown).

The second plunger 140 is formed of an elastic body. The elastic body is not limited to a specific material, and may be a material such as rubber.

The head portion 142 is inserted into the assembly hole 112 of the first plunger 111 and is inserted into the assembly hole 112 so as to be inserted into the assembly hole 112 And may have a shape corresponding to the space. The columnar portion 144 corresponds to a member connecting the head portion 142 and the bottom portion 146. The height of the columnar portion 144 may vary and the height of the columnar portion 144 may be varied depending on the height of the hydro- Can be tuned. The bottom portion 146 may be formed in a plate shape and the upper surface of the bottom portion 146 may be in close contact with the lower surface of the first plunger 111. [

5 is a view schematically showing a cross section of the hydro-bush 100 of FIG. Referring to FIG. 5, the inner pipe 110 is disposed through a central portion of the first plunger 111, and the second plunger 140 is coupled to a lower portion of the second plunger 111. At this time, the second plunger 140 is inserted through the assembly hole 112 formed at the lower end of the first plunger 111, and the head portion 142 and the pillar portion 144 of the second plunger 140 And is received in the inner space of the assembly hole 112. In this case, the upper surface of the bottom portion 146 of the second plunger 140 is in close contact with the lower end surface of the first plunger 111.

At this time, the length between the lower surface of the bottom portion 146 of the second plunger 140 and the inner surface of the outer pipe 120 becomes the stopping length L. Therefore, by adjusting the height of the columnar portion 144 of the second plunger 140, the stopping length L changes, so that the dynamic characteristics of the entire hydro bushing 100 can be controlled. That is, the second plunger 140 can be fabricated to have the required dynamic characteristics (e.g., by varying the height of the columnar portion 144), and only by changing the second plunger 140, The characteristics can be finely adjusted.

3, the hydro bushing 100 may further include a stopper 150 coupled to at least one of a front surface and a rear surface of the inner pipe 110. 3, the stopper 150 is disposed on the front surface of the inner pipe 110. As shown in FIG. The stopper 150 is coupled to at least one of the front surface and the rear surface of the inner pipe 110 as necessary to adjust the characteristics of the hydro bush 100. Since the stopper 150 is a general one, a detailed description thereof will be omitted.

As described above, in the embodiments of the present invention, the dynamic characteristics of the hydro-bush can be tuned by forming an assembly hole at the lower end of the main plunger and adjusting the height of the auxiliary plunger fitted to the assembly hole. Therefore, it is possible to flexibly and flexibly implement the hydro-bush having various characteristics.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: Hydro bush 11: My pipe
11a: plunger 12: outer pipe
13: Give and take 14: Stopper
100: Hydro Bush 110: My pipe
111: first plunger 111a: front member
111b: rear member 112: assembly hole
111c: Assembly hole 120: Outer pipe
130: elastic body 140: second plunger
142: head portion 144:
146: bottom part 150: stopper

Claims

An inner pipe connected through the first plunger,
An outer pipe accommodating the inner pipe therein,
And an elastic body formed between the inner pipe and the outer pipe to form a liquid chamber,
And an assembly hole having a predetermined size is formed at a lower end of the first plunger.

The method according to claim 1,
And a second plunger fitted to the assembly hole of the first plunger.

The method of claim 2,
A space is formed in the assembly hole,
And the second plunger includes a head portion that is seated in the space, a column portion that is formed integrally with the head portion, and a bottom portion that is integrally formed with the column portion.

The method of claim 3,
The second plunger is an elastic body.

The method according to any one of claims 1 to 4,
Wherein the first plunger is formed by joining a front member and a rear member each having an assembling groove at a lower end thereof, and the assembly groove of the front member and the rear member forms the assembly hole.

The method according to any one of claims 1 to 4,
And a stopper coupled to at least one of a front surface and a rear surface of the inner pipe.