초록 ▼

Disclosed embodiments of a dolly for towing trailers generally include a main framework, a tongue assembly, stabilizing shocks, an axle, an axle platform, a steering assembly, and/or tire-wheel assemblies. The use of these dolly embodiments reduce the probability of chassis and body damage, enable h

Disclosed embodiments of a dolly for towing trailers generally include a main framework, a tongue assembly, stabilizing shocks, an axle, an axle platform, a steering assembly, and/or tire-wheel assemblies. The use of these dolly embodiments reduce the probability of chassis and body damage, enable horizontal alignment of the trailer for level towing and greater weight distribution, and provide self-steering of the dollies as the towing vehicle turns or backs up.

대표청구항 ▼

1. A dolly for towing trailers comprising:a main framework comprising:a steering bracket;a rear end plate; anda pair of side members each having a front end portion and a rear end portion, wherein the steering bracket is coupled between the rear end portions, and wherein the rear end plate is couple

1. A dolly for towing trailers comprising:a main framework comprising:a steering bracket;a rear end plate; anda pair of side members each having a front end portion and a rear end portion, wherein the steering bracket is coupled between the rear end portions, and wherein the rear end plate is coupled to the rear end portions;a platform underneath the main framework comprising a top side and a bottom side;a steering assembly between the main framework and the platform comprising:a steering hub coupled to the steering bracket configured to retain a spare tire-wheel assembly atop the main framework; anda steering spindle having a first end portion rotatably coupled to the steering hub and a second end portion coupled to the top side of the platform; anda tongue assembly pivotably coupled to the front end portions of the side members of the main framework. 2. The dolly of claim 1 further comprising a ball mount adjusting member having a plurality of ball mount adjusting holes, the ball mount adjusting member coupled to the rear end plate. 3. The dolly of claim 2 further comprising an adjustable ball mount assembly having two pairs of adjusting holes corresponding to two ball mount adjusting holes of the ball mount adjusting member, the two adjusting holes and the two pair of adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable ball mount assembly and the ball mount adjusting member. 4. The dolly of claim 1, the tongue assembly further comprising a pair of framework mounting brackets coupled to the front end portions of the side members. 5. The dolly of claim 1 further comprising a pair of stabilizing shocks each comprising a front end portion and a rear end portion, each front end portion coupled to the tongue assembly and each rear end portion coupled to the platform. 6. The dolly of claim 1 further comprising an adjusting bracket having two pairs of hitch shank adjusting holes, the adjusting bracket coupled to the tongue assembly. 7. The dolly of claim 6 further comprising an adjustable hitch shank assembly having a plurality of adjusting holes, two adjusting holes of which corresponding to the two pairs of hitch shank adjusting holes, the two adjusting holes and the two pairs of hitch shank adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable hitch shank assembly and the adjusting bracket. 8. The dolly of claim 1 further comprising an axle coupled to the bottom side of the platform. 9. The dolly of claim 8, wherein the axle is a torsion axle comprising a cross arm coupled between a pair of control arms, a spindle coupled to each control arm, and a hub coupled to each spindle for mounting tire-wheel assemblies. 10. The dolly of claim 9 further comprising a pair of tire-wheel assemblies, each mounted onto a hub. 11. A dolly for towing trailers comprising:a main framework comprising a front end portion and a rear end portion;a ball mount adjusting member configured to receive an adjustable ball mount assembly, the ball mount adjusting member having a plurality of ball mount adjusting holes, and the ball mount adjusting member coupled to the rear end portion of the main framework; anda tongue assembly pivotably coupled to the front end portion of the main framework, the tongue assembly comprising an adjusting bracket configured to receive an adjustable hitch shank assembly, the adjusting bracket having two pairs of hitch shank adjusting holes there through. 12. The dolly of claim 11 further comprising:an adjustable ball mount assembly having two pairs of adjusting holes corresponding to two ball mount adjusting holes, the two ball mount adjusting holes and the two pair of adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable ball mount assembly and the ball mount adjusting member at a plurality of different vertical positions; andan adjustable hitch shank assem bly having a plurality of adjusting holes, two adjusting holes of which corresponding to the two pairs of hitch shank adjusting holes, the two adjusting holes and the two pairs of hitch shank adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable hitch shank assembly and the adjusting bracket. 13. The dolly of claim 11 further comprising a platform underneath the main framework comprising a top side and a bottom side. 14. The dolly of claim 11 further comprising a steering assembly comprising:a steering bracket coupled to the main framework;a steering hub coupled to the steering bracket and configured to retain a spare tire-wheel assembly a top the main framework; anda steering spindle having first and second end portions, the first end portion rotatably coupled to the steering hub. 15. The dolly of claim 14, further comprising a platform underneath the main framework having a top side and a bottom side, wherein the second end portion of the steering spindle is coupled to the top side of the platform. 16. The dolly of claim 15 further comprising an axle coupled to the bottom side of the platform. 17. The dolly of claim 16, wherein the axle is a torsion axle comprising a cross arm coupled between a pair of control arms, a spindle coupled to each control arm, and a hub coupled to each spindle for mounting tire-wheel assemblies. 18. The dolly of claim 17 further comprising a pair of tire-wheel assemblies, each mounted onto a hub. 19. A dolly for towing trailers comprising:a main framework comprising a steering bracket and a pair of side members, each side member having a front end portion and a rear end portion, and wherein the steering bracket coupled between rear end portions of the pair of side members;a ball mount adjusting member configured to receive an adjustable ball mount assembly, the ball mount adjusting member having a plurality of ball mount adjusting holes, and the ball mount adjusting member coupled to the rear end portions of the pair of side members of the main framework;a tongue assembly pivotably coupled to the front end portions of the main framework, the hinged tongue assembly comprising an adjusting bracket configured to receive an adjustable hitch shank assembly, the adjusting bracket having two pairs of hitch shank adjusting holes there through;a platform underneath the main framework comprising a top side and a bottom side;a steering assembly comprising:a steering hub coupled to the steering bracket and configured to retain a spare tire-wheel assembly a top the main framework; anda steering spindle having first and second end portions, the first end portion rotatably coupled to the steering hub and the second end portion coupled to the top side of the platform; andan axle coupled to the bottom side of the platform. 20. The dolly of claim 19 further comprising:an adjustable ball mount assembly having two pairs of adjusting holes corresponding to two ball mount adjusting holes, the two ball mount adjusting holes and the two pair of adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable ball mount assembly and the ball mount adjusting member at a plurality of different vertical positions; andan adjustable hitch shank assembly having a plurality of adjusting holes, two adjusting holes of which corresponding to the two pairs of hitch shank adjusting holes, the two adjusting holes and the two pairs of hitch shank adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable hitch shank assembly and the adjusting bracket. 21. The dolly of claim 19 the main framework further comprising a rear end plate coupled to the rear end portions of the side members of the main framework, wherein the ball mount adjusting member is coupled to the rear end plate. 22. The dolly of claim 19, further comprising a pair of stabilizing shocks each comprising a front end port ion and a rear end portion, each front end portion coupled to the tongue assembly and each rear end portion coupled to the platform. 23. The dolly of claim 19, wherein the axle is a torsion axle comprising a cross arm coupled between a pair of control arms, a spindle coupled to each control arm, and a hub coupled to each spindle for mounting tire-wheel assemblies. 24. The dolly of claim 23, further comprising a pair of tire-wheel assemblies, each mounted onto a hub. 25. A dolly for towing trailers comprising:a main framework comprising:a pair of side members each having tongue aligning holes through a front end portion thereof;a front lateral member coupled between the front end portions of the pair of side members;a steering bracket coupled between rear end portions of the pair of side members;a rear end plate coupled to the rear end portions of the pair of side members; anda ball mount adjusting member having a plurality of ball mount adjusting holes, the ball mount adjusting member coupled to the rear end plate;a tongue assembly pivotably coupled to the main framework, the tongue assembly comprising:a pair of framework mounting brackets coupled to the front end portions of the pair of side members, each framework mounting bracket comprising:a pair of bracket plates having main framework aligning holes corresponding to the tongue aligning holes, the framework aligning holes and the tongue aligning holes configured to receive a fastener there through to removable and hingedly couple the main framework and the tongue assembly;a lateral member coupled between the pair of framework mounting brackets, the lateral member comprising front and bottom sides;an adjusting bracket configured to receive an adjustable hitch shank, the adjusting bracket having two pairs of hitch shank adjusting holes, and the adjusting bracket coupled to the front side of the lateral member, andan L-bracket coupled to the bottom side of the lateral member;a pair of stabilizing shocks comprising front and rear end portions, respectively, each front end portion coupled to the L-bracket;an axle platform comprising a top side, a bottom side, and a pair of opposing shock mounting brackets, each shock mounting bracket coupled to the rear end portion of each stabilizing shock;a steering assembly comprising:a steering hub coupled to the steering bracket and configured to retain a spare tire-wheel assembly atop the main framework; anda steering spindle having first and second end portions, the first end portion rotatably coupled to the steering hub and the second end portion coupled to the top side of the axle platform;a torsion axle coupled to the bottom side of the axle platform, the torsion axle comprising:a cross arm coupled between a pair of control arms;a spindle coupled to each control arm; anda hub coupled to each spindle for mounting tire-wheel assemblies;a pair of tire-wheel assemblies, each mounted onto a hub;an adjustable ball mount assembly having two pairs of adjusting holes corresponding to two ball mount adjusting holes, the two pairs of adjusting holes and the two ball mount adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable ball mount assembly and the ball mount adjusting member; andan adjustable hitch shank assembly having a plurality of adjusting holes, two adjusting holes of which corresponding to the two pairs of hitch shank adjusting holes, the two adjusting holes and the two pairs of hitch shank adjusting holes configured to receive a fastener there through when aligned to removably couple the adjustable hitch shank assembly and the adjusting bracket. 26. The dolly of claim 25 further comprising a spring bar weight distributing assembly coupled to the adjustable ball mount assembly. 27. The dolly of claim 25 further comprising a sway control assembly coupled to the adjustable ball mount assembly. 28. The dolly of claim 25, wherein the adjustable hitch shank assembly is coupled to a hitch receiver of a towing vehicle and the adjustable ball mount assembly is coupled to a trailer tongue socket hitch.