A robot leg structure includes: a link 500 extending downward from a leg joint; a ground contact portion 600 that comes in contact with a ground, a leaf spring 300 that couples the link 500 and the ground contact portion 600 to each other; and a damping member 400 arranged to be adjacent to the leaf spring 300 and configured to couple the link 500 and the ground contact portion 600 to each other. With this configuration, the damping member 400 damps the vibration attributed to the leaf spring 300, making it possible to reliably stabilize the motion of the legs of a robot.

A robot leg structure includes: a link 500 extending downward from a leg joint; a ground contact portion 600 that comes in contact with a ground, a leaf spring 300 that couples the link 500 and the ground contact portion 600 to each other; and a damping member 400 arranged to be adjacent to the leaf spring 300 and configured to couple the link 500 and the ground contact portion 600 to each other. With this configuration, the damping member 400 damps the vibration attributed to the leaf spring 300, making it possible to reliably stabilize the motion of the legs of a robot.

A leaf spring structure is designed as a single piece to be able to change the spring rates of leaf springs under a load independently from the manufacturing material. The operating mechanism of the leaf spring allows for increasing the spring rates by deactivating the short spring, which remains between the point A and the point B, as a result of the interaction between the short spring and the long spring after a certain amount of vertical displacement in the leaf spring.

An overload suspension system configured for operative engagement to a vehicle having a first leaf spring and second leaf spring to provide auxiliary support to the vehicle when overloaded. A first control arm attached to a first torsion bar has a distal end positioned a separation distance from the first leaf spring. A second control arm attached to the second control arm has a distal end positioned substantially the same separation distance from the second leaf spring. The suspension system operates as an auxiliary suspension only when added weight to the vehicle deflects both leaf springs to contact a respective one of the control arms, thereby preserving the ride and suspension characteristics of the vehicle when the added weight is not present.

A silencer for a leaf spring for a commercial vehicle is provided. The silencer includes an upper rubber body having defined therein a fitting hole into which a second leaf spring is press-fitted, with a top surface of the upper rubber body serving as a contact surface in contact with a first leaf spring, and a lower rubber body having defined therein an accommodation space, with a first buffering protrusion being provided on a bottom surface of the lower rubber body such that a third leaf spring is able to be in contact with the first buffering protrusion.

A silencer for a leaf spring for a commercial vehicle is provided. The silencer includes an upper rubber body having defined therein a fitting hole into which a second leaf spring is press-fitted, with a top surface of the upper rubber body serving as a contact surface in contact with a first leaf spring, and a lower rubber body having defined therein an accommodation space, with a first buffering protrusion being provided on a bottom surface of the lower rubber body such that a third leaf spring is able to be in contact with the first buffering protrusion.

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 (24) 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 leaf spring rear end portion (14) forms at least part of a loop curved around a transverse axis, the loop being longitudinally elongated and having an opening (29) located at least at the front of said loop; —the rear attachment device (24) comprises a fastener (26) extending substantially transversally and received in said loop; —and the suspension system further comprises retaining means (30) configured to prevent the fastener (26) from getting out of the loop through the opening (29).

An overload suspension system configured for operative engagement to a vehicle having a first leaf spring and second leaf spring to provide auxiliary support to the vehicle when overloaded. A first control arm attached to a first torsion bar has a distal end positioned a separation distance from the first leaf spring. A second control arm attached to the second control arm has a distal end positioned substantially the same separation distance from the second leaf spring. The suspension system operates as an auxiliary suspension only when added weight to the vehicle deflects both leaf springs to contact a respective one of the control arms, thereby preserving the ride and suspension characteristics of the vehicle when the added weight is not present.

A silencer for a leaf spring for a commercial vehicle is provided. The silencer includes an upper rubber body having defined therein a fitting hole into which a second leaf spring is press-fitted, with a top surface of the upper rubber body serving as a contact surface in contact with a first leaf spring, and a lower rubber body having defined therein an accommodation space, with a first buffering protrusion being provided on a bottom surface of the lower rubber body such that a third leaf spring is able to be in contact with the first buffering protrusion.