JP2010116113A - Suspension spring seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspension spring seat to be mounted on a vehicle body with higher strength and locked to a coil spring with stronger force. <P>SOLUTION: The suspension spring seat includes a seat bracket 6 formed of a high-tension steel plate and consisting of a series of a flat collar portion 7 having a wider area than the ring diameter of the coil spring 15, a primary cylinder portion 8 slightly protruded from the inner periphery of the collar portion 7 toward the reverse face and having a diameter somewhat smaller than the inner diameter of the coil spring 15, and a secondary cylinder portion 9 largely protruded from the inner periphery of the primary cylinder portion 8 toward the reverse face and having a somewhat smaller diameter than the primary cylinder portion 8, and a rubber spring seat 12 having a cylinder portion 14 fitted to the end inner periphery of the coil spring 15 while covering the outer peripheries of the primary cylinder portion 8 and the secondary cylinder portion 9, and a flange portion 13 abutting on the reverse face of the collar portion 7 to support the coil spring 15 at its upper end. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spring seat for a suspension mainly used in an automobile.

  In general, a coil spring used for an automobile suspension is disposed between an axle supporting a wheel and a vehicle body side, and an upper end portion of the coil spring is locked to the vehicle body side via a spring seat. There existed what was shown in patent document 1, ie, FIG. 3, as a conventional spring seat. In FIG. 3, reference numeral 1 denotes a spring seat, which includes a plastic plate member (seat bracket) 2 fixed to a vehicle body component member, and a rubber member 3 attached to the plate member 2. The plate member 2 is formed by integrally forming a cylindrical inner wall portion 2b protruding downward on the inner periphery of an annular flat plate portion 2a substantially equal to the diameter of the coil spring 4, and the rubber member 3 is a circular member. It is formed in a ring shape and is attached to the lower surface of the flat plate portion 2a to be a contact surface at the upper end of the coil spring. The inner wall portion 2b has a length that allows the upper end portion of the coil spring 4 to be fitted to prevent the upper end portion of the coil spring 4 from being detached.

Since the conventional plate member 2 is made of plastic, the length L of the inner wall portion 2b is made sufficiently large so that the upper end of the coil spring 4 is fitted and held by the protruding portion from the rubber member 3, and the coil spring 4 is detached. Can be prevented. However, the plastic plate member is weak in the mounting strength to the vehicle body and the locking force of the coil spring 4. In order to solve this problem, if the plate member 2 is pressed by a high-strength high-strength steel plate, cracks will occur due to poor extensibility.
Utility Model Registration No. 3031149

  It is an object of the present invention to obtain a suspension spring seat in which the attachment strength to a vehicle body and the locking force of a coil spring are increased.

The present invention is configured as follows to achieve the above object. That is, the invention according to claim 1 is a flat flange having a larger area than the ring diameter of the coil spring, and a small diameter smaller than the inner diameter of the coil spring projecting smaller from the inner peripheral portion of the flange to the back surface direction. Made of a high-strength steel plate material that is continuously formed with a primary cylindrical portion and a secondary cylindrical portion that protrudes greatly from the inner circumference of the primary cylindrical portion toward the back surface and has a slightly smaller diameter than the primary cylindrical portion. A cylindrical bracket that covers the outer periphery of the primary cylindrical portion and the secondary cylindrical portion and fits to the inner periphery of the end portion of the coil spring, and receives the upper end of the coil spring by contacting the back surface of the flange portion. A rubber spring seat having a flange portion is provided.
In the invention according to claim 2, the seat bracket is a high-tensile steel plate of JIS standard HTH440SF.

In the invention according to claim 1 of the present application, the cylindrical portion of the seat bracket includes a primary cylindrical portion having a slightly smaller diameter than the inner diameter of the coil spring, and a stepped cylindrical portion having a secondary cylindrical portion having a slightly smaller diameter than the primary cylindrical portion. Therefore, even if it is a high-tensile steel plate material with poor extensibility, the cylindrical portion can be greatly protruded from the flange portion in the back surface direction, and the cylindrical portion becomes a stepped cylindrical shape, thereby increasing the rigidity. For this reason, the seat bracket can be firmly fastened to the vehicle body side, and the locking force between the cylindrical portion and the upper end portion of the coil spring is increased. Further, since the secondary cylindrical portion of the cylindrical portion is slightly smaller in diameter than the primary cylindrical portion, the inner diameter of the secondary cylindrical portion is not reduced so much, and the shock absorber can be easily disposed or passed through the secondary cylindrical portion. . In addition, since a rubber spring seat is interposed between the coil spring and the collar part of the seat bracket and the secondary cylindrical part, the upper end of the coil spring does not come into direct contact with the seat bracket, causing abnormal noise and wear. Disappear.
In the invention according to claim 2, since the seat bracket is made of a high-tensile steel plate of JIS standard HTH440SF, it can sufficiently withstand the load of the coil spring.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a plan view of FIG.

  In FIG. 1, reference numeral 5 denotes a spring seat of a coil spring for a suspension of an automobile, which includes a seat bracket 6 made of a high-strength steel plate material and a rubber spring seat 12 attached to the lower surface of the seat bracket 6. In this example, the seat bracket 6 is formed by pressing a high-strength steel plate having a thickness of about 1.3 mm, for example, a high-tensile steel plate of JIS standard HTH440SF. A primary cylindrical portion 8 and a secondary cylindrical portion 9 that protrude downward (backward direction) from the peripheral portion are integrally provided.

  As shown in FIGS. 1 and 2, the flange portion 7 is formed in a rectangular shape having a deformed rectangular shape in plan view having a larger area than the ring diameter of the coil spring 15, and bolt holes 10 are formed at three locations on the outer periphery. A hook portion 11 is formed on one side of the outer peripheral portion.

  The outer diameter D1 of the primary cylindrical portion 8 is slightly smaller than the inner diameter of the coil spring 15, for example, about 76 mm, and the inner peripheral portion of the flange portion 7 is smoothly curved and protrudes downward from the flange portion 7. The amount of projection (length) L1 downward from the lower surface of the flange portion 7 of the primary cylindrical portion 8 is about 6 mm. The outer diameter D2 of the secondary cylindrical portion 9 is slightly smaller than the primary cylindrical portion 8, for example, about 58 mm, and the inner peripheral portion of the primary cylindrical portion 8 is smoothly curved and protrudes downward. A protruding amount (length) L2 of the secondary cylindrical portion 9 from the lower surface of the flange portion 7 is about 22 mm.

  The spring seat 12 integrally includes a flange portion 13 that contacts the back surface of the flange portion 7 and a cylindrical portion 14 that protrudes downward (back surface direction) from the inner periphery of the flange portion 13. The thickness is about 7 mm, the outer diameter D3 is substantially the same as the outer diameter of the coil spring 15, for example, about 104 mm, the inner diameter is substantially the same as the inner diameter of the coil spring 15, for example, about 76 mm, and the lower surface of the flange portion 13 ( The back surface is defined as a receiving surface (contact surface) at the upper end of the coil spring 15.

  The cylindrical portion 14 is brought into elastic contact with the entire outer periphery of the primary cylindrical portion 8 and the secondary cylindrical portion 9, and the outer diameter thereof is approximately equal to the inner diameter of the coil spring 15, for example, about 76 mm. The downward projecting amount (length) L3 is a projecting amount substantially corresponding to the wire diameter of the coil spring 15, for example, about 15 mm.

  According to the embodiment, since the cylindrical portion protruding downward from the inner peripheral portion of the flange portion 7 is the primary cylindrical portion 8 and the secondary cylindrical portion 9 that are reduced stepwise, the high-tensile steel plate material having poor extensibility is used. Even if it exists, a cylindrical part can be greatly protruded in the back surface direction from the collar part 7, without generating a crack by press work. Further, since the cylindrical portion has a stepped cylindrical shape, the rigidity is increased. For this reason, the secondary cylindrical portion 9 is fitted deeply into the upper end portion of the coil spring 15 to increase the locking force with the coil spring 15, and the seat bracket 6 can be firmly fastened to the vehicle body side. Further, since the primary cylindrical portion 8 is slightly smaller in diameter than the inner diameter of the coil spring 15 and the secondary cylindrical portion 9 is slightly smaller in diameter than the primary cylindrical portion 8, the inner diameter of the secondary cylindrical portion 9 is not significantly reduced. The shock absorber can be easily disposed or passed through the secondary cylindrical portion 9. Further, since the rubber spring seat 12 is interposed between the coil spring 15 and the flange portion 7 and the secondary cylindrical portion 9 of the seat bracket 6, the upper end portion of the coil spring 15 does not directly contact the seat bracket 6. , Noise and wear will not occur.

It is sectional drawing which shows the Example of this invention. It is a top view of FIG. It is sectional drawing which shows a prior art example.

Explanation of symbols

5 Spring Seat 6 Seat Bracket 7 Hook 8 Primary Cylindrical Part 9 Secondary Cylindrical Part 10 Bolt Hole 11 Hook Part 12 Spring Seat 13 Flange Part 14 Cylindrical Part 15 Coil Spring

Claims (2)

  A flat flange portion (7) having a larger area than the ring diameter of the coil spring (15), and a small protrusion in the back surface direction from the inner peripheral portion of the flange portion (7) than the inner diameter of the coil spring (15). A primary cylindrical portion (8) having a slightly smaller diameter, and a secondary cylindrical portion (9) that protrudes greatly from the inner periphery of the primary cylindrical portion (8) toward the back surface and has a slightly smaller diameter than the primary cylindrical portion (8). And a sheet bracket (6) made of a high-strength steel plate, and covering the outer periphery of the primary cylindrical portion (8) and the secondary cylindrical portion (9), A rubber spring seat (12) having a cylindrical portion (14) fitted to the inner periphery of the end portion and a flange portion (13) that contacts the back surface of the flange portion (7) and receives the upper end of the coil spring (15). ) Springs for suspension .  The suspension spring seat according to claim 1, wherein the seat bracket (6) is a high-tensile steel plate of JIS standard HTH440SF.

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