JP2014083973A - Suspension structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension structure which inhibits a shock absorber of a suspension from rotating even when a front tire interferes with a collision body during a fine lap collision.SOLUTION: A spring sheet 36 is disposed at the vehicle vertical direction lower end side of a coil spring 34 forming a part of a suspension 24. A protruding part 38 protruding to the vehicle longitudinal direction front side and having a front end 38A which is disposed at the vehicle width direction inner side relative to a king pin shaft S is integrally provided with the coil spring 34 in the spring sheet 36.

Description

  The present invention relates to a suspension structure.

  Generally, a front side member extending in the vehicle front-rear direction is disposed on both sides in the vehicle width direction of an engine room provided at the front of the vehicle. A suspension member is disposed on the lower side in the vehicle vertical direction of the front side member. Furthermore, a suspension as an interference device that reduces the impact from the road surface is attached to the suspension member. A front tire is rotatably supported through a lower arm that constitutes a part of the suspension.

  Here, the following Patent Document 1 discloses a vehicle structure that absorbs a collision load when an offset collision occurs. Briefly described, in the invention described in the following Patent Document 1, a reinforcing member that surrounds the suspension and is coupled to the front side member is provided. Thereby, a reinforcement member absorbs collision energy at the time of an offset collision.

JP 2005-170209 A

  However, in the case of the invention described in Patent Document 1, when the front tire collides with the collision body during a so-called minute lap collision that collides outside the front side member in the vehicle width direction, the suspension is accompanied by the rotation of the front tire. The shock absorber, which is a part of, rotates around the kingpin axis. In addition, the rotated front tire may enter the vehicle floor. Therefore, it is desired to create a technique for suppressing the rotation of the shock absorber in order to reduce the front tire from entering the vehicle floor at the time of a minute lap collision.

  In consideration of the above facts, the present invention aims to suppress the suspension of the shock absorber of the suspension about the kingpin axis even when the front tire and the collision object interfere in the case of a minute lap collision.

  According to a first aspect of the present invention, there is provided a suspension structure for connecting a front tire and a vehicle body disposed on the lower end side of both sides of a vehicle and a shock absorber disposed along a vehicle vertical direction; In a suspension structure including a coil spring disposed around and formed in a spiral shape, and a spring seat disposed on a lower end side in the vehicle vertical direction with respect to the coil spring, the spring seat includes the coil spring A protrusion is provided that protrudes further forward in the vehicle longitudinal direction than the spring.

  The suspension structure according to a second aspect of the present invention is the suspension structure according to the first aspect, wherein the front end in the vehicle front-rear direction of the protrusion is provided on the inner side in the vehicle width direction than the kingpin shaft of the shock absorber. And

  A suspension structure according to a third aspect of the present invention is the suspension structure according to the first or second aspect, wherein the spring seat and the protruding portion are integrally provided.

  According to the first aspect of the present invention, the spring seat that constitutes a part of the suspension is provided with the protruding portion that protrudes further forward in the vehicle longitudinal direction than the coil spring. As a result, when the spring seat rotates together with the shock absorber when the front tire rotates in the case of a minute lap collision, the protruding portion of the spring seat and the collision body come into contact with each other. Therefore, it is possible to reduce the rotation of the shock absorber around the kingpin axis.

  According to the second aspect of the present invention, the front end in the vehicle front-rear direction of the protruding portion of the spring seat is provided on the inner side in the vehicle width direction than the kingpin shaft. As a result, a cancellation moment in the direction opposite to the rotation of the front tire is more likely to occur than when the front end in the vehicle front-rear direction of the protruding portion of the spring seat is provided on the outer side in the vehicle width direction than the kingpin shaft. Therefore, the shock absorber and the front tire are prevented from rotating around the kingpin axis.

    According to the third aspect of the present invention, the spring seat and the protruding portion are provided integrally. As a result, the number of parts is reduced as compared with the spring seat and the protrusion provided separately.

  As described above, the suspension structure according to the first aspect of the present invention suppresses the shock absorber from rotating around the kingpin axis at the time of a minute lap collision, and can reduce the front tire from entering the vehicle floor. It has an excellent effect.

    The suspension structure according to the second aspect of the present invention has an excellent effect that the shock absorber and the front tire can be further prevented from rotating around the kingpin axis at the time of a minute lap collision.

  The suspension structure according to the third aspect of the present invention has an excellent effect that the parts can be easily assembled to the vehicle.

1 is a perspective view showing a vehicle to which a suspension structure according to the present embodiment is applied as viewed obliquely from the left front side. FIG. 2 is a schematic diagram illustrating a state in which a collision object has entered after a minute lap collision from the state illustrated in FIG. 1.

  Hereinafter, an embodiment of a suspension structure according to the present invention will be described with reference to FIGS. 1 and 2. Note that an arrow FR appropriately shown in each drawing indicates the front side of the vehicle, and an arrow UP indicates the upper side of the vehicle. Further, the arrow RH indicates the right side in the vehicle width direction.

  As shown in FIG. 1, the vehicle front portion 10 is provided with a radiator support 14 that extends along the vehicle width direction and supports the cooling module on the front side in the vehicle front-rear direction of the engine room 12. The radiator support 14 includes a radiator support upper 14A that constitutes an upper edge, a radiator support lower 14B that constitutes a lower edge, a pair of vertical columns 14C that constitute both sides, a radiator support upper 14A and a radiator. And the vertical pillars 14D that respectively connect the center of the support lower 14B in the vehicle width direction.

  Further, a front side member 16 extending along the vehicle front-rear direction and having a substantially rectangular closed cross-sectional structure is coupled to the rear side of the vertical column 14C of the radiator support 14 in the vehicle front-rear direction. A vehicle floor 18 extends from the front side member 16 on the rear side in the vehicle front-rear direction. Further, a rocker 20 extending along the vehicle front-rear direction and having a substantially rectangular closed cross-sectional structure is disposed outside the vehicle floor 18 in the vehicle width direction. Further, the vehicle front-rear direction rear side of the front side member 16 and the rocker 20 front-rear direction front side are connected by a torque box 22.

  Further, a suspension tower (not shown) as a vehicle body is disposed outside the front side member 16 in the vehicle width direction, and the suspension tower supports a suspension 24 that interferes with an impact from a road surface while the vehicle is traveling. In addition, the suspension 24 is coupled to a suspension member made of a steel plate (not shown) on the vehicle vertical direction lower side.

  Here, the suspension 24 will be described in more detail. A caliper 26 constituting a part of the brake is disposed outside the suspension 24 in the vehicle width direction, and a front tire 28 is disposed around the caliper 26 via a lower arm 30. It is rotatably supported. Further, a shock absorber 32 extending in the vehicle vertical direction connecting the front tire 28 and the suspension tower is provided on the upper side of the lower arm 30 in the vehicle vertical direction. A spiral coil spring 34 that supports a load in the vertical direction of the vehicle is provided around the shock absorber 32, and a shock absorber 32 having a substantially circular cross section is wound around the coil spring 34. ing. Further, a spring seat 36 having a substantially circular cross section is disposed on the lower end of the coil spring 34 in the vehicle vertical direction.

  Further, the spring seat 36 is provided with a projecting portion 38 that projects forward from the coil spring 34 in the vehicle front-rear direction.

  The front-rear direction front end 38A of the projecting portion 38 of the spring seat 36 is located on the inner side in the vehicle width direction with respect to the virtual kingpin shaft S connecting the upper end of the shock absorber 32 in the vehicle vertical direction and the connecting portion of the lower arm 30 and the front tire 28. Is provided.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 1 and FIG. 2, when a collision body 40 that has entered the vehicle front portion 10 and the front tire 28 interfere with each other during a so-called micro lap collision that collides with the front side member in the vehicle width direction outside, The front tire 28 rotates about the kingpin axis S toward the rear side in the vehicle front-rear direction. Further, along with this, the shock absorber 32 and the spring seat 36 rotate around the kingpin axis S as in the front tire 28.

  Here, in the present embodiment, the spring seat 36 of the suspension 24 is provided with a protruding portion 38 that protrudes forward from the coil spring 34 in the vehicle front-rear direction. As a result, when the shock absorber 32 rotates around the kingpin axis S in the case of a minute lap collision, the spring seat 36 rotates together with the shock absorber 32, so that the projecting portion 38 of the spring seat 36 and the collision body 40 are in contact with each other. It is reduced that the contact shock absorber 32 rotates around the kingpin axis. Accordingly, it is possible to suppress the shock absorber 32 from rotating around the kingpin axis at the time of a minute lap collision, and the front tire can be prevented from entering the vehicle floor.

  Furthermore, in the present embodiment, the vehicle front-rear direction front end 38A of the protruding portion 38 of the spring seat 36 is provided on the inner side in the vehicle width direction than the kingpin shaft S. As a result, the moment acting on the periphery of the kingpin shaft S is less likely to occur than when the vehicle front-rear direction front end 38A of the protrusion 38 of the spring seat 36 is provided on the outer side in the vehicle width direction than the kingpin shaft S. Therefore, rotation of the shock absorber 32 and the front tire 28 about the kingpin axis S is suppressed.

  In the present embodiment, the spring seat 36 and the protruding portion 38 are integrally provided. Thereby, compared with what is provided with the spring seat 36 and the protrusion part 38 separately, a number of parts reduces. Therefore, it becomes easy to assemble the parts to the vehicle.

  In this embodiment, the front end in the vehicle front-rear direction of the projecting portion 38 of the spring seat 36 is disposed on the inner side in the vehicle width direction than the kingpin shaft S. However, the present invention is not limited to this, and the projecting portion 38 of the spring seat 36 A configuration in which the front end in the vehicle front-rear direction is disposed on the outer side in the vehicle width direction than the kingpin shaft S may be employed.

  In the present embodiment, the spring seat 36 and the protruding portion 38 are integrally provided. However, the present invention is not limited to this, and the spring seat 36 and the protruding portion 38 are provided separately. It may be.

24 Suspension 28 Front tire 32 Shock absorber 34 Coil spring 36 Spring seat 38 Protruding portion 38A Front end of protruding portion

Claims (3)

A shock absorber that connects the front tire and the vehicle body disposed on the lower end side of both sides of the vehicle and is disposed along the vehicle vertical direction;
A coil spring disposed around the shock absorber and spirally formed;
In a suspension structure comprising a spring seat disposed on the vehicle vertical direction lower end side than the coil spring,
A suspension structure, wherein the spring seat is provided with a protrusion that protrudes further forward in the vehicle front-rear direction than the coil spring.     The suspension structure according to claim 1, wherein a front end in the vehicle front-rear direction of the protrusion is provided on the inner side in the vehicle width direction than the king pin shaft of the shock absorber.   The suspension structure according to claim 1 or 2, wherein the spring seat and the protrusion are provided integrally.