KR20160049645A - Connection structure of a front wheel subframe for prevnting allophone - Google Patents

Abstract

The present invention relates to a connection structure of a subframe of a front wheel to prevent allophone, and more specifically, to a connection structure of a subframe of a front wheel to prevent allophone, having friction protrusions having a predetermined diameter and formed at four points on the upper end stopper, in which a subframe of a vehicle and a chassis frame are coupled, thereby preventing allophone generated in the subframe of the vehicle when the vehicle quickly brakes. According to an embodiment of the prevent invention, the connection structure of a subframe of a front wheel to prevent allophone comprises a subframe of a vehicle, the upper end stopper and a chassis frame. The subframe has a bush inner core installed on the interior thereof, the bush inner core made of elastic material and coupled to the chassis through a bolt. The upper end stopper is positioned between a left surface part of one end of the bush inner core and the chassis and has the friction protrusions formed on a position located within the thickness of the bush inner core. The chassis frame is coupled to the subframe and the upper end stopper through the bolt.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a front wheel sub-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a front wheel sub-frame connection structure for preventing joints, and more particularly, The present invention relates to a front wheel sub-frame connection structure for preventing a joint occurring in a sub-frame of a vehicle.

When the vehicle body 10 of the vehicle is coupled with the sub-frame 20 of the suspension device, a front wheel sub-frame connection structure such as a bush is provided at a position where the vehicle body 10 and the sub- .

However, when the vehicle suddenly brakes while driving on the rough road, there is a problem that the suspension is attached to the suspension of the vehicle. The reason for the occurrence of the coupling from the suspension of the vehicle is that a high load applied when the vehicle suddenly brakes is caused by the relative movement (sliding) between the upper stopper 21 surface of the front wheel sub-frame 20 and the vehicle body frame 10 It is because of joining.

FIG. 1 is a perspective view showing a stopper mounted on a front subframe and a subframe of a vehicle, and FIG. 2 is a plan view showing an upper stopper shape according to a conventional technique.

1 and 2, conventionally, when the vehicle suddenly brakes, a slip occurs at the contact portion between the stopper of the sub-frame 20 and the vehicle body 10, resulting in a joint. That is, since the contact portion of the stopper 21 according to the related art with the vehicle body 10 is formed in a planar shape, there is a problem that the frictional force for preventing the joint can not be increased. If the tightening torque of the bolt is increased to increase the frictional force with the vehicle body 10, there is a risk that the stopper 21 is damaged due to a vehicle body impact or the like. If the stiffness of the stopper 21 is increased to avoid the breakage, Which is disadvantageous to the present invention.

Therefore, in order to suppress the occurrence of the coupling of the suspension of the vehicle, a connecting structure for increasing the frictional force between the upper end of the current sub-frame 20 of the vehicle, in particular, between the stopper 21 and the vehicle body frame 10 is required.

KR 1240707 B1

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a vehicle with a vehicle body frame, So that it is possible to prevent a joint occurring in the front wheel sub-frame connection structure.

In order to achieve the above object, an embodiment of a front wheel sub-frame connection structure for preventing joint according to the present invention comprises a vehicle sub-frame in which an elastic inner bushing core coupled to a vehicle body by bolts is installed therein; An upper stopper positioned between the seat surface and the body of the bush inner core and having a friction protrusion formed within the thickness of the bush inner core; And a body frame coupled with the sub frame and the upper stopper by the bolts; . ≪ / RTI >

At this time, the friction protrusions may be formed in the body frame direction within a thickness of the bush inner core.

The height of the rubbing protrusion may be 0.2 mm or more and 0.25 mm or less, and the diameter of the rubbing protrusion may be 3 mm.

According to the present invention, it is possible to prevent noise occurring between the vehicle body and the front wheel subframe, which is the suspension device, and to improve the noise and vibration characteristics of the vehicle.

1 is a perspective view showing a front wheel sub-frame of the vehicle and a stopper mounted on the sub-frame.
2 is a plan view showing an upper stopper shape according to the prior art.
3 is a sectional view showing a front wheel sub-frame connection structure according to the present invention.
4 is a plan view showing a front wheel sub-frame connection structure for preventing a joint according to the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the invention. Also, the technical terms used herein should be interpreted in a sense that is generally understood by those skilled in the art to which the present disclosure relates, unless otherwise specifically defined in the present specification, Or shall not be construed to mean excessively reduced. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. But is to be understood as including all modifications, equivalents, and alternatives falling within the scope of the appended claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a front wheel sub-frame connection structure for preventing a joint according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view showing a front wheel sub-frame connection structure according to the present invention, and FIG. 4 is a plan view showing a front wheel sub-frame connection structure for preventing joint according to the present invention.

3 and 4, an embodiment of a front wheel sub-frame connection structure for preventing joint according to the present invention may include a vehicle sub-frame 100, an upper stopper 200, and a body frame 300 .

The vehicle subframe 100 is provided with a bush inner core 110 made of an elastic material and coupled to the vehicle body 300 by bolts 150. More specifically, the vehicle sub-frame 100 is provided with bush inner core 110, rubber 120, bush outer ring 130, stay 140, and bush inner core 110 at four positions at which the stopper 21 shown in Fig. And a bolt 150 may be respectively installed. The bush inner core 110 is engaged with the body 300 by the bolts 150. Here, the vehicle subframe 100 may be a submodule of a vehicle to which an engine or the like is attached and is coupled to the vehicle body frame 300.

The upper stopper 200 is located between the seating surface of the bushing inner core 110 and the body 300 and has a friction protrusion 210 within the thickness of the bushing inner core. That is, the upper stopper 200 is positioned between the sub frame 100 and the body frame 300 to mitigate vibrations and shock transmitted from the sub frame 100 to the body frame 300 .

The upper stopper 200 may be disposed on the vehicle body frame 300 within a thickness of the bush inner core 110 to prevent slippage on a contact surface between the subframe 100 and the body frame 300. [ A plurality of rubbing protrusions 210 may be provided. The reason why the friction protrusion 210 of the upper stopper is formed within the thickness of the bush inner core 110 is that the binding force applied by the bolt 150 is applied to the bush inner core 110 of elastic material, Since the upper end stopper 200 and the body frame 300 are closely contacted with each other by a coupling force applied to the bush inner core 110, friction protrusions must be formed within the thickness of the bush inner core 110, The slip between the stopper 200 and the body frame 300 can be prevented.

A plurality of the friction protrusions 210 of the upper stopper may be formed in the body frame direction within the thickness of the bush inner core, thereby further improving the anti-slip function. The ratio (h / t) of the height h of the friction protrusion to the thickness t of the upper stopper may be 0.2? H / t? 0.25. This is because when the ratio h / t of the height h of the friction protrusion 210 to the thickness t of the upper stopper is less than 0.2, the frictional force increasing effect of the friction protrusion 210 becomes insignificant, If the ratio (h / t) of the height h of the protrusion 210 to the thickness t of the upper stopper exceeds 0.25, the body frame 300 may be damaged by the friction protrusion 210.

The friction protrusions 210 may be disposed along the concentric circumference 2 of the seating surface of the bush inner core 110. The friction protrusions 120 may have a diameter 3 of the concentric circumference of the seating surface of the bush inner core 110, Rear direction with respect to the front-rear direction of the vehicle. Here, the cross-section of the rubbing protrusion 120 may be circular, and the diameter 4 of the rubbing protrusion may be smaller than the thickness (1) of the bush inner core. 3, when the upper end stopper 200 and the body pipe nut 310 of the body frame are in close contact with each other due to the coupling force of the bolts 150, The value obtained by subtracting the diameter 4 of the friction protrusion from the thickness 1 of the bush inner core may be the sum of the side margin values 5 of the opposing friction protrusions.

The body frame 300 is engaged with the sub frame 100 and the upper stopper 200 by the bolts 150. The boss inner core 110 presses the surface of the upper stopper 200 and the friction protrusions 210 formed on the upper stopper 200 are pressed by the bolts 150, Frame 100 and the upper stopper 200 by pressing the body frame 300. [

It will be apparent to those skilled in the art that many other modifications and variations are possible in light of the above teachings and the scope of the present invention should be construed on the basis of the appended claims something to do.

1: Thickness of Bush Inner Core
2: concentric circle of the seat inner core core of the bush
3: diameter of the concentric circle of the inner surface of the bush inner core
4: Diameter of friction protrusion
5: One-side clearance of friction protrusion
10: Body frame
20: front wheel subframe of the vehicle
100: vehicle subframe
110: Bush Inner Core 120: Rubber
130: Bush Outside 140: Stay
150: Bolt
200: Upper stopper
210: friction protrusion
300: Body frame
310: Body pipe nut

Claims (8)

In a front wheel sub-frame connection structure of a vehicle,
A vehicle subframe in which an elastic inner bushing inner core coupled to the vehicle body by bolts is installed therein;
An upper stopper positioned between the seating surface and the vehicle body frame and having a friction protrusion formed within the thickness of the bush inner core; And
A body frame coupled to the sub frame and the upper stopper by the bolts;
And a front wheel sub-frame connection structure of the vehicle.
The method according to claim 1,
Wherein a plurality of the friction protrusions are formed in a direction of the vehicle body frame within a thickness of the bush inner core.
The method according to claim 1,
Wherein a ratio (h / t) of a height (h) of the friction protrusion to a thickness (t) of the upper stopper is 0.2? H / t? 0.25.
The method according to claim 1,
Wherein the friction protrusions are disposed along a concentric circle of the seat inner core portion of the bush inner core.
The method according to claim 1,
Wherein the friction protrusions are disposed symmetrically with respect to the front-rear direction of the vehicle with respect to the diameter of the concentric circle of the seating surface of the bushing inner core.
The method according to claim 1,
Wherein a cross-section of the friction protrusion is circular.
The method according to claim 1,
And the diameter of the friction protrusion is smaller than the thickness of the bush inner core.
The method according to claim 1,
Wherein a value obtained by subtracting the diameter of the friction protrusion from a thickness of the bush inner core is a sum of a side margin value of the opposing friction protrusions.

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