KR20170123361A - Stabilizer bar mount bush apparatus - Google Patents

Abstract

The present invention provides a stabilizer bar mount bush apparatus, including: an inner pipe having a charging portion formed in a circumferential direction between both end portions; a bearing arranged to be spaced apart from at least a part of the charging part and coupled to the outer circumference of the inner pipe; and a bearing support member installed to surround the outer circumference of the bearing so as to support the bearing, wherein the charging portion has a charging space for charging lubricating oil to be acceptable, wherein the bearing is provided with a plurality of oil grooves through which a part of the bearings communicates with the charging space so as to move the lubricating oil, wherein the plurality of oil grooves are formed in a direction crossing a direction in which a concave portion is formed, and are arranged at predetermined intervals with respect to each other.

Description

STABILIZER BAR MOUNT BUSH APPARATUS < RTI ID = 0.0 >

The present invention relates to a stabilizer bar mount bushing device for improving lubrication performance between a bearing and a pipe.

The stabilizer bar applied to the independent suspension device of the automobile is a kind of torsion spring which keeps the vehicle body equilibrium by suppressing roll motion of the vehicle body when the vehicle is running on a turning or rough road surface. The stirrer bar is connected to the lower control arm or the strut assembly via a control link at both ends thereof, and both sides of the linear portion inside the stabilizer bar are fixed to the subframe via the mounting bush.

The stabilizer bar as described above functions as an auxiliary spring for supporting left and right wheels generated when the vehicle body is rolled. When the left and right wheels move in the same phase, they are not subjected to a force. When the left and right wheels move in opposite phases, Thereby restricting the roll behavior of the vehicle body.

For example, when the turning outer wheel bounces and the rebounding inner wheel rebounds, the tilting of the vehicle body is suppressed by acting to equalize the movement of both wheels, and conversely, the left and right wheels are simultaneously operated in the same direction It will not work.

Mounting bushes for fixing both sides of the stabilizer bar to the subframe are typically a lubrication bush type mount bush and a heavy duty bush type mount bush.

The mount bush of the lubricating bush type is composed of a bracket and a rubber bush with a lubricating component added thereto, and the bracket is fixed to the vehicle body or the subframe in such a manner as to surround the rubber bush.

Conventionally, the mount bushes are disadvantageous in terms of durability of the bearings, torque efficiency side of the mount bushes, tilting stiffness side, and uniaxial rotation due to the surface contact of the inner pipe and the bearings.

Further, the conventional mount bush has a problem that it is difficult to supply lubricant between the inner pipe and the bearing, particularly when the inner pipe and the bearing are in surface contact with each other.

It is an object of the present invention to provide a stabilizer bar mount bushing device having a structure for facilitating the supply of lubricant between the inner pipe and the bearing.

Another object of the present invention is to provide a stabilizer bar mount bushing device which improves the durability, torque efficiency and lubrication performance of the mount bush.

In order to solve the above problems, the stabilizer bar mount bushing device of the present invention comprises: an inner pipe having a charging part formed in a circumferential direction between both ends; A bearing arranged to be spaced apart from at least a part of the charging part and coupled to the outer periphery of the inner pipe; And a bearing support member installed to surround the outer periphery of the bearing to support the bearing, wherein the charging section has a filling space for accommodating the lubricating oil so as to be able to receive the lubricating oil, and a part of the bearing communicates with the filling space, A plurality of oil grooves through which the lubricant can move are provided and the plurality of oil grooves are formed in a direction intersecting with the direction in which the concave portions are formed and are arranged at predetermined intervals with respect to each other.

According to an embodiment of the present invention, the inner pipe has a protruding portion protruding in the circumferential direction so as to be connected to the charging portion from the outer circumference, and the protruding portion includes a first protrusion protruding in a circular arc shape having a first radius projection part; And a second protrusion that protrudes in an arc shape with a portion having the first radius and is spaced apart from the first protrusion.

The bearing includes a first member having a first line abutting portion having a curvature of a second radius, the first abutting portion being in line contact with the first projecting portion; And a second member connected to the first portion and having a second line contact portion in which a part of the inner circumference has a curvature of the second radius, the second member being in line contact with the second protrusion, And may be formed on the first and second members, respectively.

A plurality of oil grooves formed in the first member are formed to extend to the other side of the first member on which the first projection on one side of the first member on which the filling space is disposed is arranged, A plurality of oil grooves may be formed extending to the other side of the second member on which the second projection on one side of the second member on which the filling space is disposed is disposed.

The plurality of oil groove ends of the first and second members on which the filling space is disposed may be made narrower in width along the direction in which the lubricating oil is introduced so that the lubricating oil can flow in.

Wherein each of the plurality of oil grooves includes: a first rib protruding from the inner periphery of the bearing; And a second rib disposed so as to be spaced a predetermined distance from the first rib, wherein the first and second ribs movably receive the lubrication between the first and second ribs, And a lubricant accommodating portion communicating with the lubricant accommodating portion.

The stabilizer bar mounting bushing device of the present invention is provided with a plurality of oil grooves in the inner periphery of the bearing, so that the lubricant can be smoothly supplied between the inner pipe and the bearing.

In the stabilizer bar mount bushing device of the present invention, the protruding portion of the inner pipe and the bearing contact with each other, and the lubricant is supplied to the line contact portion through the lubricant accommodating portion to improve the durability, torque efficiency, Can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a stirrer bar-mounted bushing device of the present invention. Fig.
Fig. 2 is a perspective view showing the cutting and disassembling of Fig. 1; Fig.
3 is a cross-sectional view taken along line AA 'of FIG. 1;
4 is a perspective view showing the inside of the bearing.
5 is a sectional view showing a bearing and a bearing supporting member;
6 is a conceptual diagram showing a line contact state between an inner pipe and a bearing;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by the same or similar reference numerals, and a duplicate description thereof will be omitted. The suffix "part" for the constituent elements used in the following description is to be given or mixed with consideration only for ease of specification, and does not have a meaning or role that distinguishes itself. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. 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. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that other elements may be present in between something to do.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is a perspective view showing a stabilizer bar mount bushing apparatus 100 of the present invention, and FIG. 2 is a perspective view showing the cutaway and exploded view of FIG. 3 is a cross-sectional view taken along line A-A 'in Fig.

Hereinafter, the structure of the stabilizer bar mount bushing device 100 of the present invention will be described with reference to FIGS. 1 to 3. FIG.

The stabilizer bar mount bushing device (100) of the present invention includes an inner pipe (10), a bearing (20), and a bearing supporting member (30).

The inner pipe 10 has a charging part 16. The charging portion 16 is formed to be concave along the circumferential direction on the outer periphery of the inner pipe 10. The charging unit 16 has a charging space 16a. The charging space 16a is a space for accommodating the lubricant. The lubricant charged in the charging space 16a is supplied to the space between the inner pipe 10 and the bearing 20 along the oil groove 25 of the bearing 20 described later.

Further, the inner pipe 10 may have the projecting portion 13. The projecting portion 13 may be formed to protrude along the circumferential direction on the outer periphery between both ends of the inner pipe 10. The protrusions 13 may include first and second protrusions 14a and 14b, wherein the first and second protrusions 14a and 14b may each be formed in an arc shape having a first radius. The first and second projections 14a and 14b may be formed on both sides of the charging part 16. In addition, the first and second projections 14a and 14b are in line contact with the bearing 20, which will be described later in more detail.

The first and second protrusions 14a and 14b are each configured to be connected to the charger 16 so that the lubrication of the filling space 16a in the charger 16 to be described later is applied to the first and second protrusions 14a and 14b, As shown in Fig. Meanwhile, the first and second protrusions 14a and 14b may be symmetrical to each other.

The bearing 20 is disposed on the outer periphery of the inner pipe 10 and arranged to contact at least a part of the projection 13. [ The bearing 20 includes a first member 23a having a first line contact portion 23a-1 and a second member 23b having a second line contact portion 23b-1. A part of the inner circumference of the first line contact portion 23a-1 has a curvature of the second radius and is made to be in line contact with the first projection portion 14a. The second line abutting portion 23b-1 has a curvature of a part of the inner radius of the second radius, and is in line contact with the second projecting portion 14b. The first and second members 23a and 23b on the side contacting each other can be separated from the charging unit 16 by a predetermined distance.

The material of the bearing 20 may be made of, for example, a plastic material.

The first and second projections 14a and 14b of the projections 13 are brought into line contact with the first and second line abutting portions 23a-1 and 23b-1 of the bearing 20, 1 and the second radius, the line contact point generating position, and the like will be described later.

The bearing support member 30 is installed to surround the outer periphery of the bearing 20 to support the bearing 20. The bearing support member 30 may include first and second support portions 33 and 35. The first and second support portions 33 and 35 may each include a first member 23a of the bearing 20, And the second member 23b so as to support the bearing 20. 3 shows an example in which one end of the outer periphery of the second support portion 35 is fitted to one end of the inner periphery of the first support portion 33. The first support portion 33 and the second support portions 33, do.

The bearing support member 30 may be made of a metal such as steel to withstand the force transmitted from the inner pipe 10 through the bearing 20. [

On the other hand, the inner pipe 10 between the first and second protrusions 14a and 14b may be provided with a charging part 16 along the circumferential direction of the inner pipe 10. [ The charging portion 16 is formed to have a charging space 16a for accommodating the lubricating oil so that the lubricating oil accommodated in the charging portion 16 is allowed to flow between the protruding portion 13 and the bearing 20, .

The charging unit 16 is connected to the first and second protrusions 14a and 14b and the charging unit 16 is connected to the inner periphery of the bearing 20 on the side where the first and second members 23a and 23b are connected to each other An example in which a predetermined distance is spaced apart is shown in Fig.

The charging part 16 and the protruding part 13 may be formed as a whole having a '3' shape.

Fig. 4 is a perspective view showing the inside of the bearing 20, and Fig. 5 is a sectional view showing the bearing 20 and the bearing supporting member 30. Fig. 4 and 5, the oil groove 25 in the bearing 20 will be described in detail.

The first and second members 23a and 23b of the bearing 20 are provided with a plurality of oil grooves 25 each formed in a direction intersecting the circumferential direction in which the charging portion 16 is formed. The plurality of oil grooves 25 are formed so as to extend from the first and second members 23a and 23b toward the charging part 16 so as to communicate with the charging space 16a provided in the charging part 16, respectively. For example, the oil groove 25 may be formed such that the oil groove end 25a into which the lubricant flows from the charging space 16a is relatively wide so as to be easily introduced into the oil groove 25 and narrows in width along the direction in which the oil is introduced. Further, the plurality of oil grooves 25 are formed along the circumferential direction in the inner periphery of the bearing 20, and can be arranged constantly at predetermined intervals with each other.

In one example, each of the plurality of oil grooves 25 may include first and second ribs 26a and 26b. The first and second ribs 26a and 26b are arranged to be spaced from each other by a predetermined distance from the inner circumference of the bracing ring 20 and between the first and second ribs 26a and 26b, And a lubricant receiving portion 26c.

Further, the lubricant storage portion 26c communicates with the charging space 16a. The first and second ribs 26a and 26b protrude from the inner periphery of the bearing 20 and may extend between the bearing 20 on the upper side of the filling space 16a and the bearing 20 on the upper side of the projecting portion 13.

More specifically, the plurality of oil grooves 25 formed in the first member 23a have the first protrusion 14a at one side of the first member 23a disposed adjacent to the filling space 16a And may extend to the other side of the first member 23a to be disposed. The plurality of oil grooves 25 formed in the second member 23b are formed in the second member 23b in such a manner that the second protrusion 14b is disposed at one side of the second member 23b disposed adjacent to the filling space 16a, And may extend to the other side of the member 23b.

On the other hand, the first and second ribs 26a and 26b are inclined so as to have a narrow width along the direction in which the end on the inflow side is introduced to enable the inflow of the lubrication.

Due to the above structure of the plurality of oil grooves 25, the supply of the lubricant between the inner pipe 10 and the bearing 20 becomes smooth, the lubrication performance is improved, and the durability and torque efficiency of the mount bush can be improved .

6 is a conceptual diagram showing a line contact state between the inner pipe and the bearing. The inner pipe and the bearing will be described in more detail with reference to Fig. As described above, the first and second projections 14a and 14b each have a first radius, and the first and second members 23a and 23b have a second radius. The second radius of the second line contact portion 23b-1 may be set to have a value calculated using the first radius as an input value as shown in the following Equation (1).

[Equation 1]

Second radius = first radius x curvature coefficient

Here, the curvature coefficient may be greater than 1.0 but less than 1.8.

When the curvature coefficient is 1.0, the first radius and the second radius have the same value, so that the first line contact portion 23a-1 of the first member 23a and the first projection portion 14a make surface contact. In this case, the stabilizer bar mount bushing device 100 is advantageous in terms of rigidity but disadvantageous in terms of torque, so the coefficient of curvature should be greater than 1.0.

On the other hand, when the curvature coefficient is 1.8, the first line contact portion 23a-1 of the first member 23a and the first projection portion 14a make a line contact, but the stabilizer bar mount bushing device 100 has the torque side But it is disadvantageous to rigidity.

Therefore, when the curvature coefficient has a value of more than 1.0 and less than 1.8, it becomes advantageous in terms of torque and rigidity.

For example, if the first radius is R5 and the curvature coefficient is 1.2, then the second radius may be R6.

Referring to the cross-sectional view of FIG. 6, an example is shown in which a contact is made between the projecting portion 13 and the bearing 20 at one point. This one point is considered as the inner pipe 10 and the bearing 20 It can be understood as an arc which is a set of one point. Therefore, point contact is shown on the cross section in Fig. 6, and contact between the projecting portion 13 and the bearing 20 in the present invention is described as line contact.

An example in which the first and second projections 14a and 14b and the first and second members 23a and 23b of the bearing 20 are in line contact with each other is shown in more detail. The first and second projections 14a and 14b and the first and second members 23a and 23b of the bearing 20 are in line contact along the circumferential direction of the inner pipe 10, respectively. The first line contact portion 23a-1 is a line contact portion between the first member 23a and the first projection portion 14a and the second line contact portion 23b-1 is a portion that makes a line contact between the first member 23a and the first projection portion 14a, (14b).

A tangent line 27a and a normal line 28a perpendicular to the first line contact portion 23a-1 on the arc portion of the first member 23a or the first projection 14a are shown. Likewise, the tangent line 27b and the normal line 28b perpendicular to the second line contact portion 23b-1 on the arc portion of the second member 23b or the second projecting portion 14b are shown. The relationship between the normal lines 28a and 28b on the first and second line contact portions 23a-1 and 23b-1 and the imaginary central axis 17 in the inner pipe 10 will be described below.

The normal line 28a in the first line contact portion 23a-1 of the first member 23a or the first projection portion 14a is set such that the acute angle formed with the imaginary central axis 17 provided in the inner pipe 10 is 10 Deg.] To 80 [deg.].

The normal line 28b in the second line contact portion 23b-1 of the second member 23b or the second projection portion 14b is perpendicular to the imaginary central axis 17 provided in the inner pipe 10, Lt; RTI ID = 0.0 > 10 < / RTI >

6 shows an example in which the acute angle formed by the normal lines 28a and 28b and the imaginary central axis 17 provided in the inner pipe 10 is 60 degrees.

As described above, by arranging the bearing and the inner pipe so that the normal line at the first and second line contact portions forms an acute angle of 10 DEG to 80 DEG with the imaginary center axis, the torque efficiency and the tilting rigidity are improved.

The stabilizer bar mount bushing device 100 described above is not limited to the configuration and the method of the embodiments described above, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: Stabilizer Bar Mount Bushing Device
10: Inner pipe 13:
14a: first protrusion 14b: second protrusion
16: Charging part 16a: Charging space
17: imaginary central axis 20: bearing
23a: first member 23a-1: first line contact portion
23b: second member 23b-1: second line contact
25: Oil groove 25a: Oil groove end
27a, 27b: tangent lines 28a, 28b: normal
30: bearing supporting member 33: first supporting portion
35: second support portion

Claims (6)

An inner pipe having a live portion formed in a circumferential direction between both end portions;
A bearing arranged to be spaced apart from at least a part of the charging part and coupled to the outer periphery of the inner pipe; And
And a bearing support member installed to surround the outer periphery of the bearing to support the bearing,
Wherein the charging portion has a filling space for filling lubricating oil so as to be accommodated therein, and the bearing is provided with a plurality of oil grooves, a part of which is communicated with the filling space,
Wherein the plurality of oil grooves are formed in a direction intersecting with a direction in which the concave portion is formed and are arranged at predetermined intervals with respect to each other.
The method according to claim 1,
Wherein the inner pipe has a protrusion protruding along the circumferential direction so as to be connected to the charging part on the outer circumference,
The projection
A first protrusion part protruding in an arc shape having a first radius; And
And a second protrusion protruding in a circular arc shape having a first radius and spaced apart from the first protrusion.
3. The method of claim 2,
The bearing
A first member having a first line abutting portion having a curvature of a second radius, the first abutting portion being in line contact with the first projecting portion; And
And a second member connected to the first portion and having a second line contact portion in which a part of the inner circumference has a curvature of the second radius and is in line contact with the second protrusion,
And the plurality of oil grooves are formed in the first and second members, respectively.
The method of claim 3,
The plurality of oil grooves formed in the first member are formed to extend to the other side of the first member on which the first projection on one side of the first member on which the filling space is disposed,
Wherein the plurality of oil grooves formed in the second member are formed to extend to the other side of the second member on which the second projection on one side of the second member on which the filling space is disposed is disposed, Mount bushing.
5. The method of claim 4,
Wherein a plurality of oil groove ends on one side of the first and second members in which the filling space is disposed are formed to be gradually narrowed along a direction in which the lubricating oil flows in so as to allow the lubricating oil to flow in. .
5. The method of claim 4,
Wherein each of the plurality of oil grooves includes:
A first rib protruding from the inner periphery of the bearing; And
And a second rib disposed so as to be spaced apart from the first rib by a predetermined distance,
Wherein the first and second ribs include a lubricant accommodating portion movably receiving the lubricant between the first and second ribs and communicating with the charging space.

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