JP2012180923A - Suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a partial rigidity of a suspension spring, which relates to a suspension that is interposed between a vehicle body and a wheel and includes a shock absorber and a suspension spring disposed on the outer periphery of the shock absorber. And making the suspension lighter.
SOLUTION: A shock absorber D and a suspension spring S disposed on the outer periphery of the shock absorber D are interposed between a vehicle body and a wheel, and the suspension spring S is CFRP (carbon fiber reinforced plastic). Or CFRTP (carbon fiber reinforced thermoplastic).
[Selection] Figure 1

Description

  The present invention relates to a suspension that is interposed between a vehicle body and a wheel, and includes a shock absorber and a suspension spring disposed on the outer periphery of the shock absorber.

  Various proposals have been made so far for a suspension that is interposed between a vehicle body and a wheel and includes a shock absorber and a suspension spring disposed on the outer periphery of the shock absorber.

  For example, the suspension disclosed in Patent Document 1 is a strut suspension, and includes a cylinder in which a shock absorber is fixed to the wheel side, and a rod that protrudes and enters the cylinder and is fixed to the vehicle body side.

  The suspension spring is a coil spring, and is interposed between an upper spring receiver fixed to the upper end of the rod and a lower spring receiver fixed to the outer periphery of the cylinder, and is generally made of iron.

  In addition, the suspension spring is obliquely attached to the shock absorber, and by providing the structure, the suspension reduces the bending load acting on the shock absorber and prevents the rod from being deformed. Enables smooth infestation.

JP 2002-005214 A

  However, in the conventional suspension, since the suspension spring is made of an iron coil spring, it is heavy, which hinders weight reduction of the suspension.

  In addition, although the force input in the front-rear direction and the left-right direction of the shock absorber is different, it is difficult to partially adjust the rigidity of the suspension spring according to the force input in each direction in the conventional suspension spring. is there.

  Accordingly, an object of the present invention is to provide a suspension capable of reducing the weight of the suspension spring and partially adjusting the rigidity of the suspension spring in accordance with the force input in each direction of the shock absorber.

  Means for solving the above problem is a suspension comprising a shock absorber and a suspension spring disposed on the outer periphery of the shock absorber interposed between a vehicle body and a wheel. Fiber reinforced plastic) or CFRTP (carbon fiber reinforced thermoplastic).

  According to the present invention, since the suspension spring is made of CFRP or CFRTP, the suspension spring can be reduced in weight and the suspension can be reduced in weight.

  According to the present invention, since the suspension spring is made of CFRP or CFRTP, the rigidity can be changed according to the position of the suspension spring.

  Therefore, it is possible to easily adjust the rigidity of the suspension spring in accordance with the force input in each direction of the shock absorber.

  Further, by providing the above configuration, it is possible to cancel the bending load acting on the shock absorber without inclining the suspension spring and improve the mountability of the suspension as compared with the conventional case.

1 is a perspective view showing a suspension according to an embodiment of the present invention. It is a perspective view which shows the suspension which concerns on other embodiment of this invention.

  A suspension showing an embodiment of the present invention will be described below with reference to the drawings. The same reference numerals given throughout the several drawings indicate the same or corresponding parts.

  The suspension according to the present embodiment is interposed between the vehicle body and the wheel, and includes a shock absorber D and a suspension spring S disposed on the outer periphery of the shock absorber D, as shown in FIG. The suspension spring S is made of CFRP or CFRTP.

  Describing in detail below, the suspension according to the present embodiment is a strut suspension, the shock absorber D is set upright, and the vehicle body is mounted on the vehicle body via a vehicle body side mount (not shown) via the knuckle bracket 1. Connected to the wheel.

  The shock absorber D includes a rod 2 having a vehicle body side mount fixed to an upper end portion and a cylinder 3 to which a knuckle bracket 1 is attached at a lower end portion, and the rod 2 is in sliding contact with the inner periphery of the cylinder 3. It goes in and out in the cylinder 3 through a piston that does not.

  Further, although not shown, an annular rod guide is attached to the inner periphery of the upper end of the cylinder 3, and the rod 2 is pivotally supported by an annular bush fixed to the inner periphery of the rod guide.

  The shock absorber D includes damping force generating means (not shown) that suppresses the movement of the piston in the axial direction, and attenuates the expansion and contraction motion of the suspension. It should be noted that a known technique can be employed for the configuration of the damping force generating means, and detailed description thereof is omitted here.

  The suspension spring S disposed on the outer periphery of the shock absorber D is interposed between the upper and lower spring receivers 4, and the upper spring receiver is rotatably provided on the lower side of the vehicle body side mount, although not shown. And is arranged on the outer periphery of the upper end of the rod 2. On the other hand, the lower spring receiver 4 is formed in an annular shape and attached to the outer periphery of the cylinder 3.

  The suspension spring S is made up of three CFRP or CFRTP leaf springs 5a, 5b, 5c. These leaf springs 5a, 5b, 5c are equidistant on the lower spring receiver 4 along the outer periphery thereof. The rigidity of each of the leaf springs 5a, 5b, and 5c is changed by changing the fiber lamination method, changing the thickness, or changing the waveform shape of the leaf springs 5a, 5b, and 5c. Set to a different stiffness.

  That is, in the present embodiment, since the suspension spring S (leaf springs 5a, 5b, 5c) is made of CFRP or CFRTP, it is possible to reduce the weight of the suspension spring S compared to the conventional case, and It is possible to reduce the weight.

  Further, by providing the above configuration, the rigidity is changed for each position of the suspension spring S, that is, the leaf springs 5a, 5b, 5c standing on the outer periphery of the shock absorber D, and the force input in each direction of the shock absorber D Accordingly, it is possible to easily adjust the rigidity of the suspension spring S partially.

  For example, the rigidity of the leaf spring 5a on the wheel side where the bending load acts is higher than that of the other leaf springs 5b and 5c, so that the bending load can be canceled with certainty, and the other leaf springs 5b and 5c can Can receive acting force.

  Further, since the rigidity can be adjusted according to the position of the suspension spring S, it is not necessary to incline the suspension spring S, and the bending that acts on the shock absorber D while the suspension spring S and the shock absorber D are arranged coaxially. It becomes possible to cancel the load.

  Therefore, the suspension can be formed compactly, and the mountability of the suspension can be improved.

  Further, in the present embodiment, the suspension spring S is arranged on the outer periphery of the rod 2 and the bending load input to the rod 2 can be surely canceled by this suspension spring S. 2 can be formed in a small diameter.

  Next, a suspension according to another embodiment of the present invention will be described with reference to FIG. In the present embodiment, only the configuration of the suspension spring is different from the one embodiment. Since the configuration other than the suspension spring is the same as that of the embodiment, the same reference numerals are given and detailed description thereof is omitted here.

  The suspension spring S1 according to the present embodiment is interposed between upper and lower spring receivers as in the embodiment, and is made of a CFRP or CFRTP bellows.

  The suspension spring S1 is set to have different stiffness depending on the position of the suspension spring S1 by partially changing the fiber lamination method or changing the wall thickness.

  In the present embodiment, similarly to the first embodiment, since the suspension spring S1 is made of CFRP or CFRTP, it is possible to reduce the weight of the suspension spring S1 compared to the conventional one, and the suspension is lighter. Can be realized.

  Further, by providing the above configuration, the rigidity can be changed according to the position of the suspension spring S1, and the rigidity of the suspension spring S1 can be partially adjusted according to the force input in each direction of the shock absorber D. It becomes.

  For example, the rigidity of the portion 6a corresponding to the wheel side of the suspension spring S1 on which the bending load acts (inside the one-dot chain line in FIG. 2) is higher than that of the other portion 6b, so that the bending load can be canceled with certainty. A force acting in the front-rear direction of the shock absorber D can be received at the other portion 6b (outside the one-dot chain line in FIG. 2).

  Also in the present embodiment, the rigidity can be partially adjusted according to the position of the suspension spring S1, so that it is not necessary to incline the suspension spring S1, and the suspension spring S1 is coaxial with the shock absorber D. It becomes possible to cancel the bending load acting on the shock absorber D while being arranged.

  Therefore, the suspension can be formed compactly, and the mountability of the suspension can be improved.

  Also in the present embodiment, the suspension spring S1 is arranged on the outer periphery of the rod 2, and the bending load input to the rod 2 can be surely canceled by the suspension spring S1, so that it is more than conventional. The rod 2 can be formed with a small diameter.

  In the present embodiment, the suspension spring S1 is made of a bellows and also serves as a dust boot. Therefore, it is possible to prevent foreign matter from adhering to the rod 2 without providing a dust boot separately. This makes it possible to reduce the suspension size and weight further.

  While the preferred embodiment of the present invention has been described above, it should be understood that modifications, variations and changes may be made without departing from the scope of the claims.

  For example, in the above embodiment, the suspension is a strut type suspension, but it goes without saying that the suspension according to the present invention may be used for other suspension structures.

  Moreover, in the said embodiment, although the buffer D was set to the upright type, it is good also as an inverted type.

  In the above embodiment, the suspension spring S is composed of the three leaf springs 5a, 5b, 5c and is arranged at equal intervals in the circumferential direction of the shock absorber D. The number of sheets and the interval can be selected as appropriate.

D Shock absorber S, S1 Suspension spring 1 Knuckle bracket 2 Rod 3 Cylinder 4 Lower spring support 5a, 5b, 5c Leaf spring

Claims (4)

  A suspension comprising a shock absorber and a suspension spring disposed on the outer periphery of the shock absorber interposed between a vehicle body and a wheel, wherein the suspension spring is made of CFRP or CFRTP. .   The shock absorber includes a cylinder and a rod protruding and retracting in the cylinder, and the suspension spring is disposed on the outer periphery of the rod with one end supported by an annular spring receiver attached to the outer periphery of the cylinder. The suspension according to claim 1.   The suspension according to claim 1 or 2, wherein the suspension spring includes a plurality of leaf springs standing on an outer periphery of the shock absorber.   The suspension according to claim 1 or 2, wherein the suspension spring is made of a bellows and also serves as a dust boot.

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