JP2004316866A - Seat spring rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat spring rubber having the effects of suppressing vibration and noises for a long period without increasing the number of parts, the weight thereof and manufacturing costs. <P>SOLUTION: The seat spring rubber comprises a cylindrical portion 4 and a flange 5. The cylindrical portion 4 insertable into one end 2A of a coil spring 2 of a suspension is formed externally fittable to a fitted portion 3 of a supporting member 1 on the vehicle body side or on the wheel side of the suspension. The flange 5 is held between a supporting seat 6 of the supporting member 1 and one end 2A of the coil spring 2 and received in the radial direction of the flange 5 by a peripheral wall 7 continuously provided on the outer periphery of the supporting seat 6. A flange portion 9 received by the peripheral wall 7 is formed with its diameter smaller by a set value than the inner diameter of the peripheral wall 7 in the state of being assembled on the suspension. In assembly on a vehicle body, the diameter of the flange 5 is enlarged by the load of the vehicle body and the flange portion 9 is formed to come into contact with the peripheral wall 7 of the supporting member 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention comprises a cylindrical portion and a flange extending from the cylindrical portion,
The tubular portion is insertable into one end of a coil spring of a suspension device, and is formed so as to be able to be externally fitted to a fitted portion of a support member on the vehicle body side or the wheel side of the suspension device,
The flange is sandwiched between a receiving seat of the support member and one end of a coil spring, and is configured to be received in a radial direction of the flange by a peripheral wall provided continuously with an outer peripheral portion of the receiving seat. About the seat spring rubber.
[0002]
[Prior art]
The above-mentioned seat spring rubber is assembled to a suspension system of a vehicle to prevent vibration and noise from being transmitted to the vehicle body. Conventionally, in a seat spring rubber of this type, a flange portion received on a peripheral wall of a support member is formed to have substantially the same diameter as an inner diameter of the peripheral wall before being attached to the suspension device, and is mounted on the suspension device. At this time, it was fitted in the annular recess formed by the peripheral wall.
[0003]
According to this configuration, when the suspension device is assembled to the vehicle body and the seat spring rubber receives the load of the vehicle body, the flange is compressed by a large force not only in the axial direction but also in the radial direction. Therefore, as shown in FIG. 4, the outer peripheral portion of the flange portion 9 received by the peripheral wall 7 bulges over the peripheral wall 7 of the support member 1 (20 is the bulged portion), and the following problem occurs. May have occurred.
[0004]
Since the flange 5 is repeatedly pressed by the coil spring 2 with the vibration of the vehicle body, when the above-mentioned bulging state is reached, the flange 5 is pushed radially outward (in the direction of arrow A in FIG. 4) by the coil spring 2. More easily. Then, once the extrusion is started, the extrusion gradually proceeds, and the cylindrical portion 4 is also pulled by the flange 5, and a part of the cylindrical portion 4 comes off from the inner peripheral portion or one end portion of the coil spring 2 (FIG. It shows a state in which the lower end is slightly raised by being pulled.) Further, the coil spring 2 approaches or comes into contact with the receiving seat 6 and the fitted portion 3 of the support member 1, and it becomes difficult to suppress vibration and noise. In FIG. 4, reference numeral 12 denotes a small flange connected to the peripheral wall 7.
[0005]
In order to solve these problems, a technique of Patent Document 1 has been proposed in which an annular metal fitting concentric with the cylindrical portion is embedded in the cylindrical portion to suppress deformation of the cylindrical portion.
[0006]
[Patent Document 1]
JP 2002-323078 A
[Problems to be solved by the invention]
However, according to the technique of Patent Document 1, an annular metal fitting is required, and the number of parts is increased. In vulcanization molding, the metal fittings must be accurately positioned with respect to the cylindrical part, or the adhesive must be applied to the metal fittings, which takes time and effort to manufacture, and reduces manufacturing costs. Was higher. Further, there is another problem that the weight of the seat spring rubber is increased by the amount of the metal fitting.
[0008]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a seat spring capable of obtaining a vibration / noise suppressing effect for a long period of time without increasing the number of parts, increasing the weight, and increasing the manufacturing cost. The point is to provide rubber.
[0009]
[Means for Solving the Problems]
The feature of the present invention consists of a cylindrical portion and a flange extending from the cylindrical portion,
The tubular portion is insertable into one end of a coil spring of a suspension device, and is formed so as to be able to be externally fitted to a fitted portion of a support member on the vehicle body side or the wheel side of the suspension device,
The flange is sandwiched between a receiving seat of the support member and one end of a coil spring, and is configured to be received in a radial direction of the flange by a peripheral wall provided continuously with an outer peripheral portion of the receiving seat. Seat spring rubber,
The flange portion received by the peripheral wall is formed to have a smaller diameter by a set value than the inner diameter of the peripheral wall of the support member before being attached to the suspension device, and is attached to the suspension device and attached to the vehicle body. Then, the diameter of the flange is increased by the load of the vehicle body, and the flange portion is configured to contact the peripheral wall of the support member.
[0010]
According to this configuration, the flange portion received by the peripheral wall of the support member is formed to have a smaller diameter than the inner diameter of the peripheral wall by a set value before being attached to the suspension device, and the seat spring rubber applies a load to the vehicle body. By receiving and expanding the diameter, the flange portion comes into contact with the peripheral wall of the support member, so that the pressing force of the flange against the peripheral wall can be reduced. That is, the radial compressive force applied to the flange can be reduced, and the outer peripheral portion of the flange can be prevented from climbing over the peripheral wall of the support member and expanding.
[0011]
When the expansion of the outer peripheral portion of the flange is suppressed in this way, even if the flange is repeatedly pressed by the coil spring due to the vibration of the vehicle body, the flange is less likely to be pushed radially outward by the coil spring. As a result, it is possible to avoid the problem that the tubular portion comes off the inner peripheral portion or one end portion of the coil spring, and it is possible to avoid the problem that the coil spring approaches or comes into contact with the seat of the seat bracket or the fitted portion. Can be prevented from being reduced.
[0012]
According to the above configuration, since a metal fitting for suppressing deformation of the cylindrical portion is not required, the number of parts is not increased or the weight is not increased. In addition, there is no need to perform positioning of the metal fittings during vulcanization molding and application of an adhesive to the metal fittings, and the number of operations in the molding process does not increase.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows a vehicle upper seat spring rubber 10 interposed between a vehicle body-side seat bracket 1 (corresponding to a support member) of a suspension device and an upper end portion 2A (corresponding to one end portion) of a coil spring 2 of the suspension device. Is shown.
[0014]
The seat bracket 1 is manufactured by press-molding a metal plate, and includes a downwardly truncated conical fitting convex portion 3 having a radially central portion and a receiving seat 6 around the fitting convex portion 3. . A shallow downward peripheral wall 7 is continuously provided on an outer peripheral portion of the receiving seat 6, and a small flange 12 is formed at a lower end portion of the peripheral wall 7. The receiving seat 6 is fixed to the vehicle body with mounting bolts (not shown). The upper end 2A of the coil spring 2 is formed in a tapered shape with an upper constriction.
[0015]
As shown in FIGS. 1 and 2, the upper seat spring rubber 10 includes a cylindrical portion 4 and a flange 5 extending from an upper end of the cylindrical portion 4.
[0016]
The cylindrical portion 4 is formed so as to be able to be inserted and fitted inside the upper end 2A of the coil spring 2 and to be fitted outside the fitted projection 3 of the seat bracket 1. That is, the coil spring 2 is formed in a straight body shape slightly larger in diameter than the inner diameter of the upper end portion 2A, and the inner peripheral portion is formed in a tapered hole portion which is narrowed downward. The lower end of the cylindrical portion 4 is located slightly below the lower end of the fitted convex portion 3, and the interference between the fitted convex portion 3 and the coil spring 2 is prevented by the cylindrical portion 4.
[0017]
The flange 5 includes a thick portion 16 on the radially inner side and a thin portion 17 connected to the outer periphery of the lower end of the thick portion 16. The thick portion 16 is formed in a truncated conical shape with a narrowed upper portion, and the thin portion 17 is formed in a disk shape perpendicular to the axis of the flange 5. A plurality of grooves 8 for setting a spring constant to a desired value are formed radially on the upper end surfaces of the cylindrical portion 4 and the flange 5. The thick portion 16 is configured to be sandwiched between the receiving seat 6 of the seat bracket 1 and one end 2A of the coil spring 2 and received by the peripheral wall 7 of the receiving seat 6 in the radial direction of the flange 5. I have.
[0018]
The flange portion 9 received by the peripheral wall 7 is formed to have a smaller diameter than the inner diameter of the peripheral wall 7 of the seat bracket 1 by a set value before being attached to the suspension device. Then, when the upper seat spring rubber 10 is mounted on the suspension device and mounted on the vehicle body, the flange 5 expands in diameter due to the load of the vehicle body, and as shown in FIG. Contact 7
[0019]
By bringing the flange portion 9 into contact with the side wall 7 in this manner, the pressing force of the flange 5 against the peripheral wall 7 can be reduced. That is, the radial compression force applied to the flange 5 can be reduced, and the outer peripheral portion of the flange 5 can be prevented from climbing over the peripheral wall 7 of the seat bracket 1 and expanding. The vertical load applied to the upper seat spring rubber 10 from the vehicle body is 3800N to 7000N.
[0020]
In an assembled state to the vehicle body, the outer peripheral surface of the thick portion 6 and the outer peripheral surface of the thin portion 7 are smoothly connected. Then, the thin portion 7 comes into contact with and covers the inclined surface 11 of the upper end portion 2A of the coil spring 2. This makes it difficult for the coil spring 2 and the seat spring rubber to be displaced in the radial direction.
[0021]
As described above, when assembled to the suspension and assembled to the vehicle body, the flange 5 is expanded in diameter by the load of the vehicle body, and the flange portion 9 is configured to contact the peripheral wall 7 of the seat bracket 1.
[0022]
[Another embodiment]
The numerical values given in the above embodiment are examples, and may be other numerical values. The present invention can also be applied to a lower seat spring rubber interposed between a wheel-side seat bracket (corresponding to a support member) of the suspension device and a lower end portion of the coil spring 2 of the suspension device.
[0023]
Examples of the material of the seat spring rubber include natural rubber, butadiene rubber, and styrene-butadiene rubber.
[0024]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the seat spring rubber which can obtain the vibration and noise suppression effect for a long period of time without causing increase in the number of parts, weight increase, and increase in manufacturing cost was able to be provided.
[Brief description of the drawings]
FIG. 1 is a plan view of a seat spring rubber. FIG. 2 is a cross-sectional view taken along the line AOA of FIG. 1. FIG.
FIG. 4 is an assembly diagram of a conventional seat spring rubber.
DESCRIPTION OF SYMBOLS 1 Support member 2 Coil spring 2A One end of coil spring 3 Fitted part 4 Tubular part 5 Flange 6 Receiving seat 7 Peripheral wall 9 Flange part

Claims (1)

It is composed of a cylindrical portion and a flange extending from the cylindrical portion,
The tubular portion is insertable into one end of a coil spring of a suspension device, and is formed so as to be able to be externally fitted to a fitted portion of a support member on the vehicle body side or the wheel side of the suspension device,
The flange is sandwiched between a receiving seat of the support member and one end of a coil spring, and is configured to be received in a radial direction of the flange by a peripheral wall provided continuously with an outer peripheral portion of the receiving seat. Seat spring rubber,
The flange portion received by the peripheral wall is formed to have a smaller diameter by a set value than the inner diameter of the peripheral wall of the support member before being attached to the suspension device, and is attached to the suspension device and attached to the vehicle body. The seat spring rubber is configured such that when the flange is expanded, the diameter of the flange is increased by a load of the vehicle body, and the flange portion comes into contact with a peripheral wall of the support member.

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