A suspension system for a vehicle includes a frame mounting bracket for mounting to the vehicle. First and second levers are pivotally mounted to the frame mounting bracket. First and second rubber torsion axle assemblies are rigidly mounted to the first and second levers, respectively. A control ar
A suspension system for a vehicle includes a frame mounting bracket for mounting to the vehicle. First and second levers are pivotally mounted to the frame mounting bracket. First and second rubber torsion axle assemblies are rigidly mounted to the first and second levers, respectively. A control arm pivotally connects to the first lever and the second lever. The control arm, and the first and second levers are configured to rotate the first rubber torsion axle assembly and the second rubber torsion axle assembly simultaneously when a static or dynamic force is encountered by the suspension assembly. First and second spindle swing arms can be attached to the first and second torsion axle assemblies respectively with the first spindle swing arm extending forward of the first lever with respect to a direction the vehicle normal travels and the second swing arm can trail the second lever in a “push-pull” configuration.
대표청구항▼
1. A suspension assembly for a vehicle comprising: a frame mounting bracket configured to be mounted to the vehicle;a first lever pivotally mounted to the frame mounting bracket;a second lever pivotally mounted to the frame mounting bracket;a first rubber torsion axle assembly rigidly mounted to the
1. A suspension assembly for a vehicle comprising: a frame mounting bracket configured to be mounted to the vehicle;a first lever pivotally mounted to the frame mounting bracket;a second lever pivotally mounted to the frame mounting bracket;a first rubber torsion axle assembly rigidly mounted to the first lever;a second rubber torsion axle assembly rigidly mounted to the second lever;a control arm pivotally connected to the first lever and pivotally connected the second lever, wherein the control arm, the first lever and the second lever are configured to move the first rubber torsion axle assembly at least partially upward and to move the second rubber torsion axle assembly at least partially downward nearly simultaneously when a force is encountered by the suspension assembly. 2. The suspension assembly for a vehicle of claim 1 further comprising: a spindle swing arm, and wherein the first rubber suspension assembly further comprises:an outer housing;a central torsion axle shaft;rubber springs, wherein the rubber springs are located between the outer housing and the central torsion axle shaft; andwherein the spindle swing arm is connected to the central torsion axle shaft at a swing arm pivot point. 3. The suspension assembly for a vehicle of claim 2 wherein the first lever is configured to pivot about a frame mounting bracket pivot point and the control arm pivots with the first lever at a control arm pivot point, wherein at a no-load position of the suspension assembly the frame mounting bracket pivot point is above the swing arm pivot point, and wherein the swing arm pivot point is above the control arm pivot point. 4. The suspension assembly for a vehicle of claim 3 wherein the swing arm pivot point is forward of the frame mounting bracket pivot point and the control arm pivot point. 5. The suspension assembly for a vehicle of claim 3 further comprising: a spindle rod connected to the spindle swing arm and configured to have a wheel connected to the spindle rod, andwherein when the wheel encounters a force the first rubber torsion axle assembly reacts to absorb at least some of the force, wherein the second rubber torsion axle assembly acts in series with the first rubber torsion axle assembly to absorb at least some of the force. 6. The suspension assembly for a vehicle of claim 2 wherein the spindle swing arm is a first spindle swing arm, the outer housing is a first outer housing, the central torsion axle shaft is a first central torsion axle shaft and the rubber springs are first rubber springs and further comprising: a second spindle swing arm, and wherein the second rubber torsion axle assembly further comprises:a second outer housing;a second central torsion axle shaft;second rubber springs, wherein the second rubber springs are located between the second outer housing and the second central torsion axle shaft; andwherein the first spindle swing arm is connected to the first central torsion axle shaft so that the first spindle swing arm extends forward of the first torsion axle shaft with respect to a direction of normal forward travel of the vehicle, and wherein the second spindle swing arm is connected to the second central torsion axle shaft so that the second spindle swing arm extends rearward of the second torsion axle shaft. 7. The suspension assembly for a vehicle of claim 6 wherein the first lever, second lever and control arm are configured to rotate the second spindle swing arm in an upward direction when the first spindle swing arm encounters force pushing the first spindle swing arm in a downward direction, and wherein the first lever, second lever and control arm are configured rotate to the second spindle swing arm in a downward direction when the first spindle swing arm encounters force pushing the first spindle swing arm in a upward direction. 8. The suspension assembly for a vehicle of claim 2 wherein the spindle swing arm is a first spindle swing arm, the outer housing is a first outer housing, the central torsion axle shaft is a first central torsion axle shaft and the rubber springs are first rubber springs and further comprising: a second spindle swing arm, and wherein the second rubber torsion axle assembly further comprises:a second outer housing;a second central torsion axle shaft;second rubber springs, wherein the second rubber springs are located between the second outer housing and the second central torsion axle shaft; andwherein the first spindle swing arm is connected to the first central torsion axle shaft so that the first spindle swing arm extends forward of the first torsion axle shaft with respect to a direction of normal forward travel of the vehicle, and wherein the second spindle swing arm is connected to the second central torsion axle shaft so that the second spindle swing arm extends rearward of the second torsion axle shaft. 9. The suspension assembly for a vehicle of claim 1 wherein the first lever and second lever are configured to rotate the first rubber torsion axle assembly and the second rubber torsion axle assembly in response to the first rubber torsion axle assembly reacting to absorb at least some of the force. 10. The suspension assembly for a vehicle of claim 1 wherein the control arm is an elongated control arm with a first end and a second end, wherein the first end is pivotally connected to the first lever and the second end is pivotally connected to the second lever. 11. The suspension assembly for a vehicle of claim 1 wherein a spring rate of the first rubber torsion axle assembly when cooperating with the second rubber torsion axle assembly is about half the spring rate of the first rubber torsion axle assembly which would be exhibited without the second rubber torsion axle assembly cooperating with the first rubber torsion axle assembly. 12. The suspension assembly for a vehicle of claim 1 further comprising: a third rubber torsion axle assembly rigidly mounted to the frame mounting bracket between the first rubber torsion axle assembly and the second rubber torsion axle assembly. 13. The suspension assembly for a vehicle of claim 12 wherein the third rubber torsion axle assembly is configured to operate independently of the first rubber torsion axle assembly and the second rubber torsion axle assembly. 14. A suspension assembly for a vehicle comprising: a vehicle frame;a first lever pivotally connected to the vehicle frame at a first frame pivot axis;a first torsion axle assembly mounted to the first lever;a second lever pivotally connected to the vehicle frame at a second frame pivot axis;a second torsion axle assembly mounted to the second lever;a control arm pivotally connected to the first lever and pivotally connected to the second lever and configured to rotate the first torsion axle assembly about the first frame pivot axis while simultaneously rotating the second torsion axle assembly about the second frame pivot axis; wherein the entire control arm is movable forward relative to the vehicle frame during pivotal movement of the control arm relative to the first and second levers;a first spindle swing arm pivotally mounted to the first lever at a first swing arm pivot axis;a first spindle secured to the first spindle swing arm rearward of the first swing arm pivot axis;a second spindle swing arm pivotally mounted to the second lever at a second swing arm pivot axis; anda second spindle secured to the second spindle swing arm forward of the second swing arm pivot axis. 15. The suspension assembly for a vehicle of claim 14 wherein the first torsion axle assembly comprises: a first outer housing;a first central torsion axle shaft; anda first rubber spring between the first outer housing and the first central torsion axle shaft, wherein the second torsion axle assembly comprises:a second outer housing;a second central torsion axle shaft;a second rubber spring between the second outer housing and the second central torsion axle shaft. 16. The suspension assembly of claim 14 wherein the control arm is directly pivotally connected to the first lever and directly pivotally connected to the second lever. 17. A suspension assembly for a vehicle comprising: a vehicle frame;a first lever pivotally connected to the vehicle frame at a first frame pivot axis;a first torsion axle assembly mounted to the first lever;a second lever pivotally connected to the vehicle frame at a second frame pivot axis;a second torsion axle assembly mounted to the second lever;a control arm pivotally connected to the first lever and pivotally connected to the second lever and configured to rotate the first torsion axle assembly about the first frame pivot axis while simultaneously rotating the second torsion axle assembly about the second frame pivot axis; wherein the entire control arm is movable forward relative to the vehicle frame during pivotal movement of the control arm relative to the first and second levers;a first outer housing;a first central torsion axle shaft; anda first rubber spring between the first outer housing and the first central torsion axle shaft, wherein the second torsion axle assembly comprises:a second outer housing;a second central torsion axle shaft;a second rubber spring between the second outer housing and the second central torsion axle shaft, and further comprising:a first spindle swing arm pivotally connected to the first torsion axle shaft at a first spindle swing arm pivot axis; anda second spindle swing arm pivotally connected to the second torsion axle shaft at a second spindle swing arm pivot axis;wherein the control arm pivotally rotates about the first lever at a first control arm pivot axis and pivotally rotates about the second lever at a second control arm pivot axis, wherein when the suspension assembly is at a static load condition the first frame pivot axis is above the first spindle swing arm pivot axis and the first spindle swing arm pivot axis is above the first control arm pivot axis, and wherein when the suspension assembly is at the static load condition the second frame pivot axis is above the second spindle swing arm pivot axis and the second spindle swing arm pivot axis is above the second control arm pivot axis. 18. A suspension assembly for a vehicle comprising: a vehicle frame:a first lever pivotally connected to the vehicle frame at a first frame pivot axis;a first torsion axle assembly mounted to the first lever;a second lever pivotally connected to the vehicle frame at a second frame pivot axis;a second torsion axle assembly mounted to the second lever;a control arm pivotally connected to the first lever and pivotally connected to the second lever and configured to rotate the first torsion axle assembly about the first frame pivot axis while simultaneously rotating the second torsion axle assembly about the second frame pivot axis: wherein the entire control arm is movable forward relative to the vehicle frame during pivotal movement of the control arm relative to the first and second levers;a first outer housing;a first central torsion axle shaft; anda first rubber spring between the first outer housing and the first central torsion axle shaft, wherein the second torsion axle assembly comprises;a second outer housing;a second central torsion axle shaft;a second rubber spring between the second outer housing and the second central torsion axle shaft, and further comprising:a first spindle swing arm pivotally connected to the first torsion axle shaft at a first spindle swing arm pivot axis; anda second spindle swing arm pivotally connected to the second torsion axle shaft at a second spindle swing arm pivot axis;wherein the first spindle swing arm is elongated with a first end and a second end, wherein the second spindle swing arm is elongated with a first end and a second end, wherein the second end of the first spindle swing arm is connected to the first rubber spring at the first spindle swing arm pivot axis, wherein the first end of the first spindle swing arm is forward, with respect to a normal forward traveling direction of the vehicle, of the first spindle swing arm pivot axis; and wherein the second end of the second spindle swing arm is connected to the second rubber spring at the second spindle swing arm pivot axis, wherein the first end of the second spindle swing arm is rearward, with respect to a normal forward traveling direction of the vehicle, of the second spindle swing arm pivot axis.
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이 특허에 인용된 특허 (7)
Dunlap, William; Tharp, Ronnie L., Multi-axle vehicle suspension system.
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