JP3767364B2 - Spring seat for vehicle suspension - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spring seat for a vehicle suspension that is interposed between a coil spring of a vehicle suspension and a vehicle body side member, etc., and relieves input vibration from the suspension side through the coil spring.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 5 to 7, for example, this type of spring seat 1 includes a bottomed tubular portion 3 partially inserted from the vehicle body side into a coil spring 8, and a tubular portion 3. A resin-made or metal-made core member 2 integrally provided with a radially outwardly extending annular flange portion 4 disposed coaxially at the vehicle body side end portion, and both sides of the flange portion 4 of the core member 2 And a rubber elastic body 5 integrally formed by vulcanization molding and comprising a thick elastic support portion 6 on the mounting surface side of the coil spring and a thin portion 7 on the surface facing the vehicle body side. Yes. In order to soften the spring constant in the vertical direction, the elastic support portion 6 is provided with a recessed portion 6a cut out in a groove shape extending in the center direction from the outer peripheral end at equal intervals in the circumferential direction on the mounting surface side of the coil spring 8. ing. Therefore, the spring seat 1 can soften the spring characteristics in the axial direction (the vehicle vertical direction) and can secure the overall rigidity by the hard core member 2, so that the abnormal noise caused by rubbing between the vehicle body and the spring seat can be ensured. Can be suppressed.
[0003]
[Problems to be solved by the invention]
By the way, since the spring seat 1 has a concave-convex shape in which the mounting surface side of the coil spring 8 of the rubber elastic body 5 has the concave portion 6a, abnormal noise is generated when the end portion of the coil spring contacts and rubs against the wall surface of the concave portion. There is a problem that it occurs and becomes large particularly in a low temperature atmosphere. In particular, such abnormal noise is a problem in high-class vehicles in which noise generation of the entire vehicle is suppressed to a low level. On the other hand, if the mounting surface side of the coil spring of the rubber elastic body is made flat and the contact surface side with the core member is made uneven, it is possible to prevent noise caused by rubbing between the coil spring and the rubber elastic body. However, in this case, since the rubber elastic body cannot be formed on the core member by vulcanization molding, both are not adhered to each other and are arranged in contact with each other. Another kind of abnormal noise is generated due to friction between the body and the contact surface.
[0004]
The present invention is intended to solve the above-described problem, and can flexibly improve the spring characteristics in the axial direction (the vertical direction of the vehicle), and can ensure the overall rigidity by the hard core member. An object of the present invention is to provide a spring seat for a vehicle suspension capable of suppressing the generation of abnormal noise due to contact with a portion.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the structural feature of the invention described in claim 1 is that the suspension of the vehicle is interposed between a coil spring and a counterpart member such as a vehicle body side member or a wheel side support member. A suspension seat for a vehicle suspension that mitigates input vibrations through the coil spring from the suspension side, and a cylindrical portion in which a part of the coil spring is coaxially inserted from the counterpart member side, and a cylinder A flange portion that extends radially outward at the mating member side end of the cylindrical portion and is cut away from the radial outer end side toward the end of the cylindrical portion at a plurality of locations in the circumferential direction. The resin core or the metal core member provided integrally and the attachment coil side on which the coil spring of the flange portion of the core member is attached are integrally bonded and formed by vulcanization. The entire end portion of the ring being adapted to contact, and in response to cut-out position of the flange portion, and an elastic body having a recess extending in the axial direction together with the opening to the surface of the counterpart member side It is in having.
[0006]
In the invention of claim 1 configured as described above, the spring seat is composed of a rigid core member composed of a cylindrical portion and a flange portion, and an elastic body portion integrally formed thereon by vulcanization molding. , The overall rigidity is ensured. In addition, since the elastic body portion has an opening corresponding to the notched position of the flange portion and a recess extending in the axial direction with respect to the surface on the counterpart member side , the spring constant of the elastic body portion is Be soft. Such a concave portion of the elastic body portion can be easily formed integrally by vulcanization molding by matching with the notch position of the flange portion of the core member. Furthermore, since the entire end portion of the attached coil spring is in close contact with the elastic body portion, it is possible to suppress the generation of noise due to rubbing with the elastic body portion of the coil spring.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a vehicle suspension spring seat according to the embodiment between a coil spring 21 of a suspension and a vehicle body side member 22 which is a counterpart member. FIG. 2 to FIG. 4 show the spring seat 10 in a cross-sectional view, a plan view and a bottom view. The spring seat 10 includes a core member 11 having a bottom and a substantially long cylindrical shape made of hard resin, and a rubber elastic body portion 15 integrally formed on the core member 11 by vulcanization molding. Hereinafter, the vehicle body side will be described as the upper side and the coil spring side as the lower side.
[0008]
The core member 11 is formed by integral molding such as resin injection molding, and has a substantially inverted conical shape with an upper end portion provided in a cylindrical portion 12 and a lower end of the cylindrical portion 12 and a center hole 13a. A bottom plate portion 13 and an annular flange portion 14 provided at the upper end of the cylindrical portion 12 and extending radially outward are integrally provided. The flange portion 14 has cutout portions 14a that extend in a substantially rectangular shape from the outer peripheral edge to the vicinity of the inner periphery at a plurality of equally spaced locations in the circumferential direction. It is uneven. In addition, about the flange part, the notch part may have reached the upper end of the cylindrical part 12, and the form from which each part was isolate | separated may be sufficient. The material of the core member is not limited to resin and may be made of metal such as iron.
[0009]
The rubber elastic body portion 15 is provided with a thick elastic support portion 16 in the axial direction in which the bottom surface 16a is flat with a cylindrical shape provided on the entire lower side including the notch portion 14a of the flange portion 14, The thickness of the elastic support portion 16 is longer than the axial length of the cylindrical portion of the cylindrical portion 12. The elastic support portion 16 is provided with a notch hole 16b corresponding to the position of the notch portion 14a of the flange portion 14 and being a recess having substantially the same shape as the notch portion 14a and extending to a substantially middle portion in the axial direction. Yes. The width in the circumferential direction of the notch 16b may be different from the shape of the notch 14a, but by making it substantially the same shape as the notch 14a, the positional deviation from the notch 14a can be easily made. It can be recognized, and the positional deviation from the notch portion 14a of the notch hole 16b can be prevented during manufacture.
[0010]
The bottom surface 16a of the elastic support portion 16 has a substantially long triangular cross-sectional shape in the axial direction extending from a substantially intermediate position in the radial direction of the bottom surface 16a to the vicinity of the lower end of the tubular portion 12 except for a position corresponding to the notch hole 16b. A rib 17 having a shape is provided. By adopting such a rib 17 shape, the rubber portion can be lightened while giving strength as the rib 17. Therefore, the core member 11 and the rib 17 made of hard resin increase the strength of the cylindrical portion, and can effectively perform the guide function when the spring seat 10 is mounted on the vehicle. Further, the rubber elastic body portion 15 is provided with a thin covering portion 18 that covers substantially the entire upper side of the flange portion 14. By providing the covering portion 18, it is possible to suppress the generation of abnormal noise during contact with the vehicle body side member 22 and the like. The covering portion 18 is an extension portion 19 that extends from the upper end of the tubular portion 12 along the inner peripheral surface, and extends beyond the cylindrical portion of the tubular portion 12. In the vicinity of the upper end of the cylindrical portion 12 of the extension portion 19, a ring-shaped positioning convex portion 19a that slightly protrudes from the surface along the circumferential direction is provided.
[0011]
The spring seat 10 uses a predetermined molding die composed of a pair of split molds, the core member 11 is set in one split mold, and is adjusted to the notch portion 14a and to the depth of the notch hole 16b. The other split mold having the protruding portion is molded and molded integrally by rubber vulcanization, and the notch 16b is easily formed on the flange portion 14 side opposite to the flat surface of the elastic support portion 16. Can be formed.
[0012]
As shown in FIG. 1, the spring seat 10 is assembled after the retainer 23 is fixed to the vehicle body side member 22, and the outer peripheral flange portion 23 a of the retainer 23 is positioned on the positioning protrusion of the extension portion 19 of the rubber elastic body portion 15. It is attached to the vehicle body side member 22 by engaging with the part 19a. Further, the spring seat 10 is inserted into the coil spring 21 of the suspension, and the end portion of the coil spring 21 is pressed against the flat bottom surface 16a of the elastic support portion 16 of the rubber elastic body portion 15 to elastically support the entire end portion. The part 16 can be brought into close contact. In this way, the spring seat 10 is tightly assembled between the vehicle body side member 22 and the coil spring 21.
[0013]
In the embodiment configured as described above, the spring seat 10 includes a rigid core member 11 having a cylindrical portion 12 and a flange portion 14, and a rubber elastic body portion 15 integrally formed thereon by vulcanization molding. Therefore, the overall rigidity is ensured. Further, the rubber elastic body portion 15 has a cutout hole 16b opened corresponding to the position of the cutout portion 14a of the core member 11 with respect to the surface on the vehicle body side member 22 side. A spring constant of 15 is softened. Furthermore, since the bottom surface 16a on the coil spring 21 mounting surface side of the rubber elastic body portion 15 is flattened, the entire end portion of the coil spring 21 can be in close contact with the bottom surface 16a. Therefore, it is possible to suppress the generation of abnormal noise due to rubbing of the coil spring 21 with the rubber elastic body portion 15.
[0014]
As a result, according to the present embodiment, it is possible to suppress the generation of abnormal noise due to rubbing of the coil spring 21 with the bottom surface 16a of the rubber elastic body 15, and particularly to suppress this type of abnormal noise in a luxury vehicle with a low noise level. Thus, the ride comfort of the vehicle can be improved. Further, since the entire rigidity of the spring seat 10 is ensured by the core member 11, it is possible to prevent the generation of noise due to friction between the rubber elastic body portion 15 and the vehicle body side member 22 and to attach the spring seat 10 to the vehicle body. In some cases, the guide function can be effectively performed. Further, since the rubber elastic body portion 15 is provided with the cutout hole 16b, the spring characteristic of the rubber elastic body portion 15 in the vehicle vertical direction is softened.
[0015]
In the above embodiment, the plurality of cutout portions 14a provided in the flange portion 14 and the cutout holes 16b provided corresponding to the positions thereof are provided in the circumferential direction with the same shape and at equal intervals. They do not have to be the same shape and at equal intervals. However, since the same spring characteristics can be exhibited regardless of the position of the end portion of the coil spring 21 in the circumferential direction by having the same shape and equal intervals, the spring seat 10 can be easily assembled to the vehicle body. And its reliability is enhanced. Moreover, in the said embodiment, although the bottom face 16a of the rubber elastic body part 15 is flat, if the whole edge part of the coil spring 21 can maintain a close contact state with the bottom face 16a, there may be some unevenness | corrugations. .
[0016]
Moreover, in the said embodiment, although an elastic body part is preferably a rubber elastic body, other elastic body elastomers etc. may be sufficient. Further, in the above embodiment, the mating member with which the spring seat abuts is the vehicle body side member, but the mating member may be a wheel side support member such as a suspension link. In addition, about the spring seat shown in the said embodiment, it is an example and can be implemented with a various form in the range which does not deviate from the main point of this invention.
[0017]
【The invention's effect】
According to the first aspect of the present invention, since the entire end of the coil spring is in close contact with the elastic body portion, it is possible to suppress the generation of noise due to friction with the elastic body portion of the coil spring. In particular, it is possible to improve the riding comfort of the vehicle by suppressing this kind of abnormal noise in a luxury vehicle with a low noise level. In addition, the rigidity of the entire spring seat is secured by the core member, and it is possible to prevent the generation of noise due to friction between the elastic body portion and the counterpart member, and to effectively perform the guide function when the spring seat is mounted on the vehicle body. be able to.
[0018]
Furthermore, since the elastic body portion is provided with a recessed portion that opens in correspondence with the notched position of the flange portion with respect to the surface on the counterpart member side , the spring characteristic of the elastic body portion in the vehicle vertical direction is soft. The vibration reducing effect is enhanced. Moreover, the recessed part opened corresponding to the notch position of a core member can be easily and cheaply formed by performing rubber vulcanization molding using the notch provided in the flange part of the core member.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a state of being interposed between a coil spring of a spring seat and a vehicle body side member according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing the spring seat.
FIG. 3 is a plan view showing the spring seat.
FIG. 4 is a bottom view showing the spring seat.
FIG. 5 is a longitudinal sectional view showing a conventional spring seat.
FIG. 6 is a plan view showing the spring seat.
FIG. 7 is a bottom view showing the spring seat.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Spring sheet, 11 ... Core member, 12 ... Cylindrical part, 13 ... Bottom plate part, 14 ... Flange part, 14a ... Notch part, 15 ... Rubber elastic body part, 16 ... Elastic support part, 16a ... Bottom face, 16b ... Notch hole, 19a ... Positioning convex part, 21 ... Coil spring, 22 ... Vehicle body side member.

Claims (1)

In a vehicle suspension, a vehicle suspension spring seat is interposed between a coil spring and a counterpart member such as a vehicle body side member or a wheel side support member, and mitigates input vibration from the suspension side through the coil spring. There,
A cylindrical portion that is coaxially inserted and arranged in the coil spring from the counterpart member side, and extends radially outward at the counterpart member side end of the cylindrical portion and in the circumferential direction thereof A resin or metal core member integrally provided with a flange portion cut out from the radially outer end side toward the end portion side of the cylindrical portion at a plurality of locations;
The mounting portion of the flange portion of the core member is integrally bonded and formed by vulcanization to the mounting surface side on which the coil spring is mounted, and the entire end portion of the mounted coil spring is in close contact, and A spring seat comprising: an elastic body portion provided with a concave portion that opens in the surface of the counterpart member and extends in the axial direction corresponding to the notched position of the flange portion.

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