Center axle suspension system for trailers |
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| 申请号 | US3792870D | 申请日 | 1972-08-31 | 公开(公告)号 | US3792870A | 公开(公告)日 | 1974-02-19 |
| 申请人 | OWATONNA MFG CO; | 发明人 | KANENGIETER G; | ||||
| 摘要 | A center axle suspension system for trailers in which the trailer chassis has conventional side wheels for supporting the same and a pair of center wheels positioned ahead of the side wheels and mounted on a pivoted lever to permit pivotal upward and downward movement of the center wheels relative to the fixed side wheels for increased stability and smoother ride of the trailer. | ||||||
| 权利要求 | 1. A trailer type wagon comprising, an elongated bed, a chassis supporting the elongated bed and secured thereto beneath the same, a pair of axles mounted on the sides of the chassis in horizontal alignment, wheel means mounted on said axles, a pivot hitch positioned on one end of said chassis, a center axis suspension member mounted intermediate the sides of the chassis and to one side of the axis of horizontal alignment of the pair of axles toward the pivot hitch, said suspension means including a pivoted lever member mounted on the underside of the chassis for limited pivoted movement and having spring means positioned between said pivoted lever member and the chassis, said spring means being a pair of compression springs positioned between the pivoted lever member and the chassis and including cylindrical members secured respectively to the chassis and the lever member fitting inside the coil springs to position and guide the same, and an axle including wheels positioned thereon mounted on the pivoted lever member, said cylindrical members secured to the pivoted lever member being mounted on a support pivotally connected to the pivoted lever member to provide for movement of one end of the springs with movement of the pivoted lever member. 2. The trailer type wagon of claim 1 in which the pair of axles are rigidly connected under the sides of the chassis and each include a pair of wheels positioned respectively on each side of the connection to the chassis. 3. The trailer type wagon of claim 2 in which the chassis includes a flange structure connected thereto and cooperating with a second flange structure carried by said lever member to restrict pivotal movement of the lever member relative to the chassis. 4. The trailer type wagon of claim 1 in which the pivoted lever member is pivotally mounted at one end on the undersurface of the chassis structure adjacent said pivot hitch end with the free end of the pivoted lever member extending toward the aligned horizontal axis of the pair of axles and with the third axle intermediate the extent of the pivoted lever member. 5. The trailer type wagon of claim 4 in which the axis of the third axle is offset from the axis of the aligned pair of axles in the range of 4 to 20 inches toward the hitch end of the chassis member with the axles being mounted in fixed spaced parallel relationship for all movements of the pivoted lever member. 6. A trailer type structure comprising, a chassis, a pair of axles rigidly mounted to the frame adjacent the sides thereof and intermediate the length thereof, said axles being mounted in horizontal alignment and mounting at least a pair of wheel means thereon, hitch means positioned at one end of the chassis for coupling the same to a draft vehicle, a center wheel suspension means connected to the undersurface of the chassis intermediate the sides thereof and to one side of the pair of axles toward the hitch end of the same, said center wheel suspension means including lever means pivotally mounted on the chassis and carrying a third axle with wheel means thereon disposed centrally of the chassis, and means biasing said lever means into a fixed position relative to the chassis and peRmitting limited pivotal movement of the lever means toward and away from the chassis, said biasing means includes springs rigidly connected to the chassis at one extremity and pivotally connected to the lever means. |
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