Vehicle suspension systems are described herein. An example vehicle suspension includes a yoke to couple a knuckle to an axle of the vehicle suspension. The yoke includes a post to receive the axle and a lobe projecting from the post.

The invention relates to a suspension system of a vehicle axle, comprising:a leaf spring (11);a rear attachment device which is configured to be secured to a vehicle frame (2) and which receives a rear end portion (14) of the leaf spring (11) so as to allow said leaf spring rear end portion to slide longitudinally relative to the rear attachment device; wherein:the rear attachment device (24) comprises a fastener (26) extending substantially transversally and a pad (28) secured on the rear attachment device above the fastener;the leaf spring rear end portion (14) is substantially flat and has an upper face (15) in contact with the pad (28) and a lower face (16);and the suspension system further comprises a retaining member (30) which is a piece separate from the leaf spring (11). The retaining member (30) is secured to and under the leaf spring rear end portion (14) by a fixing element (50) located rearward of the pad (28), the retaining member (30) including a front wall (33) arranged forward of the fastener (26), and configured to abut against the fastener (26) in order to prevent a rearward movement of the leaf spring (11) relative to the rear attachment device (24) above a predetermined limit.

The invention relates to a suspension system of a vehicle axle, comprising:a leaf spring (11);a rear attachment device which is configured to be secured to a vehicle frame (2) and which receives a rear end portion (14) of the leaf spring (11) so as to allow said leaf spring rear end portion to slide longitudinally relative to the rear attachment device; wherein:the rear attachment device (24) comprises a fastener (26) extending substantially transversally and a pad (28) secured on the rear attachment device above the fastener;the leaf spring rear end portion (14) is substantially flat and has an upper face (15) in contact with the pad (28) and a lower face (16);and the suspension system further comprises a retaining member (30) which is a piece separate from the leaf spring (11). The retaining member (30) is secured to and under the leaf spring rear end portion (14) by a fixing element (50) located rearward of the pad (28), the retaining member (30) including a front wall (33) arranged forward of the fastener (26), and configured to abut against the fastener (26) in order to prevent a rearward movement of the leaf spring (11) relative to the rear attachment device (24) above a predetermined limit.

A suspension system for a vehicle is provided. The suspension system includes a first chassis rail extending longitudinally in an axial direction of the vehicle. The suspension system also includes a second chassis rail extending longitudinally in the axial direction of the vehicle. The suspension system further includes a transverse beam coupled to the first chassis rail and the second chassis rail. The suspension system yet further includes at least one leaf spring extending in a transverse direction of the vehicle, the at least one leaf spring having a spring rate that is actively variable. The suspension system also includes a fulcrum locator operatively coupled to the at least one leaf spring and to the transverse beam, the fulcrum locator in a sliding relationship with the at least leaf one spring.

A suspension system for a vehicle is provided. The suspension system includes a first chassis rail extending longitudinally in an axial direction of the vehicle. The suspension system also includes a second chassis rail extending longitudinally in the axial direction of the vehicle. The suspension system further includes a transverse beam coupled to the first chassis rail and the second chassis rail. The suspension system yet further includes at least one leaf spring extending in a transverse direction of the vehicle, the at least one leaf spring having a spring rate that is actively variable. The suspension system also includes a fulcrum locator operatively coupled to the at least one leaf spring and to the transverse beam, the fulcrum locator in a sliding relationship with the at least leaf one spring.

A leaf spring device includes a main leaf made of a steel plate including an elastic section configured to generate elastic force when bent; and an eye section formed in an end portion of the elastic section, the elastic section and the eye section being tempered. There is also provided a method for manufacturing the leaf spring device. The eye section is formed by rolling the end of the elastic section into a circular form. The eye section is tempered at a higher temperature than the elastic section.

A suspension system comprises a leaf spring and a slider box. The leaf spring is a cambered leaf spring and comprises a first end with a first coupler that couples to a first point on a frame of a vehicle and a second end. Further, a pivot point resides between the first end and the second end. The slider box comprises a coupler that fixedly couples the slider box to a second point on the frame of a vehicle. Further, an opening of the slider box accepts the second end of the leaf spring such that the leaf spring slides in the slider box when the leaf spring is flattened. Moreover, the spring box comprises a foreshortening mechanism that changes an effective length of a portion of the leaf spring between the second end of the leaf spring and the pivot point of the leaf spring as the leaf spring flattens.

The invention relates to a suspension system of a vehicle axle, comprising: a leaf spring (11); a rear attachment device (24) configured to be secured to a vehicle frame (2) and comprising two parallel walls (40) spaced apart along a transverse direction by a distance (d). A rear end portion (14) of the leaf spring (11) is received in the rear attachment device (24), between said walls (40), and is capable of sliding longitudinally relative to the rear attachment device. The leaf spring rear end portion (14) has a first width (w1) which is smaller than the distance (d), and the leaf spring (11) has a second width (w2) which is greater than the distance (d), at least in a blocking portion (30) of the leaf spring (11) located forward of the rear end portion (14).

The invention relates to a suspension system of a vehicle axle, comprising: a leaf spring (11); a rear attachment device (24) configured to be secured to a vehicle frame (2) and comprising two parallel walls (40) spaced apart along a transverse direction by a distance (d). A rear end portion (14) of the leaf spring (11) is received in the rear attachment device (24), between said walls (40), and is capable of sliding longitudinally relative to the rear attachment device. The leaf spring rear end portion (14) has a first width (w1) which is smaller than the distance (d), and the leaf spring (11) has a second width (w2) which is greater than the distance (d), at least in a blocking portion (30) of the leaf spring (11) located forward of the rear end portion (14).

A vehicle suspension arrangement includes a suspension slider assembly including first and second laterally spaced longitudinal frame members configured to be slidably coupled to a first vehicle frame member, first and second gusset members fixed to the first and second longitudinal frame members and each including a relief, a first lateral frame member extending between the first and second longitudinal frame members, the first lateral frame member having ends received within the reliefs, an axle member configured to support a pair of wheel assemblies, and a suspension assembly configured to support the suspension slider assembly from the axle member, the suspension assembly including a spring member positioned between the suspension slider assembly and the axle member.