JPH08164Y2 - Dustproof structure of elastic member of iso-clamp in vehicle suspension system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension system for a vehicle using a leaf spring, and more particularly, the leaf spring surrounds an outer peripheral portion of the leaf spring at a substantially central portion thereof. It is designed to be fastened to the axle of a vehicle through a clamp member arranged in this manner, and an elastic member such as rubber is provided in the clearance between the inner peripheral surface of the clamp member and the outer peripheral surface of the leaf spring. Relates to an elastic member in a vehicle suspension device of a type interposed in a compressed state. In addition, this type of clamp member
It is also called "iso clamp".

In the suspension system for a vehicle of this type, the elastic member is
It is used to prevent noise and vibration from the road surface.

Now, this will be briefly described below with reference to FIGS. 7 and 8 of the accompanying drawings showing an example of a suspension device of this type. That is, as shown in the figure, the leaf spring 1
On the axle 2 having a substantially E-shaped cross section,
At the central portion of the leaf spring 1 in the longitudinal direction, the leaf spring 1 is arranged at a right angle to the vertical center plane Y-Y of the axle 2.
Has a length of approximately U-shaped in cross section, with the lower part opening from above and the flange parts 3 ₁ and 3 ₂ projecting outward from the opening part, respectively. The clamp member 3 is put through the opening at the bottom of the clamp member 3, the flange portions 3 ₁ and 3 ₂ are placed on the upper surface of the axle 2, and further, from the top surface of the clamp member 3, a pair of U bolts 4 is attached. The axles 2 are vertically arranged symmetrically with respect to the vertical center plane Y-Y of the axle 2, and the leg portions of each U-bolt 4 are vertically passed through the upper portion of the axle 2 and the axle portions are respectively attached to the lower end portions. by the lower surface of the second upper portion screwed nut 4 _0, the clamping member 3 on the axle 2, mounted rigidly through the U bolt 4, thereby, but so as to fasten the leaf spring 1 to the axle 2 , Noises and vibrations from the road surface are transmitted from the axle 2 to the leaf spring 1, Then, in order to prevent the elastic member 5 from being directly transmitted to the vehicle body side, an elastic member 5 such as rubber having a certain thickness is provided in the clearance between the inner peripheral surface of the clamp member 3 and the outer peripheral surface of the leaf spring 1. Is installed in a compressed state.

Further, the inner peripheral upper surface 5 ₁ of the elastic member 5 is usually 9
As shown, a large number of recesses 5 ₂ are formed at substantially equal intervals, when the elastic member 5 is compressed to a predetermined thickness, the elastic member 5 without a clamping member 3, protruding possible It is like this.

However, in such a shape of the elastic member 5, as shown in FIG. 10, when it is compressed to a predetermined thickness,
Between the both ends of the elastic member 5 and the upper surface of the leaf spring 1, a shape such as earth and sand is easily held. Further, the earth and sand D repeatedly move between the upper surface of the leaf spring 1 and the elastic member 5 when a large reduction force is applied to the leaf spring 1, and therefore the surface of the leaf spring 1 is abraded. However, there are problems such as shortening the life.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, the present invention relates to a conventionally known clamp member provided with a leaf spring and an elastic member, that is, a so-called iso-clamp vehicle suspension system. Earth and sand in an elastic member such as rubber that is interposed between the inner peripheral surface and the outer peripheral surface of the leaf spring for the purpose of preventing noise and vibration from the road surface from being transmitted to the leaf spring. It is an object of the present invention to obtain a novel elastic member capable of reducing or eliminating the adverse effect on the leaf spring due to the above.

In order to solve this problem, in the present invention, as shown in FIGS. 1 and 2 of the accompanying drawings, a leaf spring (1) is opened at the center of its length and at the bottom. It is housed inside a clamp member (3) having a U-shaped cross section and having a certain length, and the leaf spring (1) is fastened to the axle (2) or the like via the clamp member (3). In order to prevent noise and vibration from the road surface from being transmitted to the leaf springs (1), the outer peripheral surface of these leaf springs (1) and the clamp member (3) are provided. An elastic member (5) having a certain thickness and having a large number of recesses (5 ₂ ) provided at intervals on the inner peripheral surface (5 ₁ ) in a gap between the inner peripheral surface and , In a vehicle suspension of the type in which it is installed such that it is elastically compressed, the longitudinal direction of the elastic member (5) Upper and constantly elastically curved dustproof skirt downward to contact the lower surface plate spring (1) with each end portion extending in the longitudinal direction of the leaf spring (1) and (5 ₀₎ , recesses for forming the uneven shape on the inner side of the dust-proof skirt (5 ₀₎ (5 ₂₎
And and a convex inner peripheral surface portion (5 _3), the inner peripheral surface portion (5 ₃₎ is a structure which is formed as a dust-proof wall (5 _3).

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

First, FIG. 1 is a schematic view showing a main part of one embodiment of the present invention. The elastic member 5 made of rubber or the like according to the present invention is generally shown in FIG. similar to objects, together with its inner Although many recesses 5 ₂ on the upper surface of the circumferential surface 5 ₁ is provided, on each end in the longitudinal direction of the clamping member 3 are extended in the longitudinal direction of the leaf spring 1 dustproof hem 5 ₀ in the long dimension in the direction thicker than the thickness of the to and elastic member 5 curved downward are formed integrally, and also, it recesses 5 ₂
The convex inner peripheral surface portion 5 ₃ adjacent to each other with a space therebetween is formed as a dustproof wall 5 ₃ having a height lower than the thickness of the elastic member 5, and the inner peripheral surface portion 5 ₃ and the concave portion 5 ₂ are separated from each other. It is formed in a continuous uneven shape.

Although one embodiment of the present invention has such a structure, the elastic member 5 having such a structure is provided between the outer peripheral surface of the leaf spring 1 and the inner peripheral surface of the clamp member 3. When installed between them and compressed to a predetermined thickness, the state shown in FIG. 2 is obtained. That is, the dust-proof skirt 5 ₀ formed at each end of the elastic member 5, are elastically extended in the upper surface of the leaf spring 1, will be in close contact therewith, also, recess
5 ₂ dust-proof walls 5 ₃ adjacent across a is to some extent compressed, so as not to transmit excessive rolling force to the leaf spring 1.
However, the other portion presses the upper surface of the leaf spring 1 with a predetermined rolling force.

In this way, when the elastic member 5 according to the present invention is installed in a compressed state in the clearance between the outer peripheral surface of the leaf spring 1 and the inner surface of the clamp member 3, the elastic member 5 has a general convex-concave shape. Noise and vibration from the road surface are prevented from being transmitted to the leaf spring 1 due to the rolling force, and the entry of earth and sand between the elastic member 5 and the upper surface of the leaf spring 1 is dustproof skirt 5 _0, the upper surface of the leaf spring 1, a large area is prevented by resilient contact (see FIG. 2), also unlikely beyond the contact portion, soil, etc. there even may enter the interior of the elastic member 5, the sediment, etc., by the dust-proof walls 5 ₃ provided inwardly of the dust-proof skirt 5 _0, than, from entering inwardly Effectively blocked.

Also, dustproof skirt 5 _0, since in contact with the upper surface of the leaf spring 1 has a length elastically, for example, as shown in Figure 3, the leaf spring 1, or bound, as shown in FIG. 4, or when you rebound, as shown in those figures, the dust-proof skirt 5 ₀ remains elastically contacts the upper surface of the leaf spring 1, enable the dustproof effect It has a structure that keeps it at the same time and it is difficult to hold the earth and sand at both ends.

In the above, according to the present invention, the leaf spring 1 is attached to the axle 2 via the U-shaped clamp member 3 at the central portion in the longitudinal direction.
In the case of a suspension device of the type that is attached to the above, an example has been described in which the elastic member 5 such as rubber is installed between the outer peripheral surface of the leaf spring 1 and the inner surface of the clamp member 3. the present invention is this type without being limited to the suspension system, for example, as shown in 5 and 6 FIG, a steel leaf spring 1 _0, FRP (fiberglass reinforced plastic) plate made spring Steel leaf spring 1 which is the No. 1 leaf in the so-called hybrid spring that is a combination of ₁ and 1.
_0, on top of the clamp member 3, also, No.2 the FRP plate spring 1 ₁ or less of the leaf is disposed in the interior of the clamping member 3, the outer peripheral surfaces of the FRP plate made spring 1 ₁ Also in a suspension device of the type in which an elastic member 5 such as rubber is installed between the clamp member 3 and the inner surface of the clamp member 3.
When the present invention is implemented, the FRP leaf spring ₁₁ is
It is possible to effectively eliminate the problem of being vulnerable to abrasion due to soil and the like.

Effect of the Invention The present invention has the above-described configuration and operation,
In a suspension system for a vehicle of a type in which a leaf spring is attached to an axle or the like via a clamp member and an elastic member at a central portion thereof, a rubber is provided in a clearance between an inner peripheral surface of the clamp member and an outer peripheral surface of the leaf spring. When an elastic member such as is installed, in order to prevent the phenomenon in which the leaf spring is worn off by the sand or the like that may enter between the elastic member and the leaf spring, this elastic member is provided with a dustproof portion, By dividing it into a rolling force transmitting part, it effectively blocks the ingress of earth and sand between the leaf spring and the elastic member, preventing wear of the leaf spring and also exhibiting soundproofing and vibration damping effects. Is what you can do.

In particular, the present invention covers the fact that the FRP leaf spring is vulnerable to wear when used in a so-called hybrid spring iso-clamp method in which a steel leaf spring and an FRP leaf spring are combined. In addition, it is possible to realize an effect that a spring which is lightweight and has a long life can be realized.

[Brief description of drawings]

FIG. 1 is a sectional view showing an essential part of one embodiment of an elastic member according to the present invention, FIG. 2 is a similar sectional view for explaining its action, and FIG. 3 is shown in FIGS. 1 of the present invention shown
FIG. 4 is a similar sectional view showing the elastic member according to the embodiment in a bound state of a leaf spring, FIG. 4 is a sectional view showing the same in a rebound state of the leaf spring, and FIG. 5 is an embodiment of the present invention applied to a so-called hybrid spring. 6 is a sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is a whole showing an example of a suspension system for a vehicle having a conventional elastic member. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7, and FIG. 9 is a partial sectional view showing the elastic member in a state before being mounted between the leaf spring and the clamp member. FIG. 10 and FIG. 10 are sectional views similarly shown in a state after attachment. 1, 1 ₀ ... leaf spring, 1 ₁ ... FRP leaf spring, 2 ... axle, 3
...... clamping members 5 ...... elastic member, 5 ₀ ...... dustproof skirt, 5 ₁ ...... inner peripheral surface, 5 ₂ ...... recess 5 ₃ ...... dust-proof walls.

Claims (1)

[Scope of utility model registration request] 1. A leaf spring (1) is housed inside a clamp member (3) having a certain length, the open cross section of which is U-shaped at the center of its length, A vehicle suspension system in which a spring (1) is fastened to an axle (2) or the like via a clamp member (3), and these leaf springs (1) are used to prevent noise and vibration from the road surface. )
An elastic member (5) having a certain thickness is installed in the clearance between the outer peripheral surface of the clamp member and the inner peripheral surface of the clamp member (3) such that almost all of the elastic member is elastically compressed. In the vehicle suspension system of the type, each end portion in the longitudinal direction of the elastic member (5) is extended in the length direction of the leaf spring (1) and its lower surface is always elastic with the upper surface of the leaf spring (1). in a curved dustproof skirt downwardly into contact (5 _0), the inner circumference of the recess (5 ₂₎ and convex for forming the uneven shape on the inner side of the dust-proof skirt (5 ₀₎ and a surface portion (5 _3), the inner peripheral surface portion (5 ₃₎ is dustproof structure of the elastic member iso clamping in the vehicle suspension system, characterized in that it is formed as a dust-proof wall (5 _3).