Hutchinson spring suspension. Overbuilt steel main frame. Powder coated finish. Holland 5th Wheel. LED tail light package. Electric brakes for dolly. Jumper hoses tractor needs an air supply system. Several customers have reached out to us in the past year looking for a better way to pull semi trailers under unfavorable conditions, here are a few examples: 1. When connected in tandem relation to a tractor, the dolly has limited rotational capacity to accommodate rough terrain without loss of drive traction.
A fifth wheel on the dolly is specially vertically shiftable relative to the dolly frame, between a lowered non-coupling position when the dolly is attached in tandem to the tractor, and a raised coupling position when used to haul a second trailer. The dolly fifth wheel is specially supported and locked in its raised position. Neff, Charles G. Holland, MI. Click for automatic bibliography generation. Download PDF The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows 1.
The dolly in claim 1 wherein said fifth wheel support means includes bracket means pivotally attached to said frame and vertically shiftable relative thereto and pivotally attached to said fifth wheel; and power shifting means operably arranged to shift said fifth wheel and bracket means vertically between said positions.
The dolly in claim 2 wherein said power shifting means comprises fluid cylinder means attached to said frame and operable on said fifth wheel support means. The dolly in claim 2 including bracket stop means positioned to limit upward vertical shifting of said bracket means and the fifth wheel thereon.
The dolly in claim 1 wherein said fifth wheel support means is laterally shiftable between a non-supporting position allowing said fifth wheel to be vertically shifted between its raised and lowered positions, and a fifth wheel support position directly vertically between said dolly frame and said fifth wheel when in its raised position.
The dolly in claim 5 wherein said fifth wheel support means comprises a pair of support shoes shiftable laterally of said dolly frame in opposite directions to each other, between a laterally inwardly non-support position and a laterally outwardly support position. The dolly in claim 1 wherein said wheeled axle assembly includes variable capacity air spring means operably positioned to elevate said frame with respect to the axle assembly for regulating the load thereon when said dolly is connected to the rear of a truck tractor in tandem axle fashion.
A trailer support and hauling dolly for use in combination with a truck tractor, between the tractor and a following trailer in tandem axle fashion with the rear axle of the tractor, and convertible for use between the rear of a front trailer and the front of a rear trailer, comprising: 9. The combination of claim 8 wherein said tongue assembly includes a sleeve fixed to said frame and a tongue member slidably mounted in said sleeve, said sleeve being telescopically interengageable with said receiving means on said tractor, said securing means including said sleeve having arcuate slots therein forming said pin-receiving openings and said pins being mounted on said receiving means for positioning in said arcuate slots to thereby allow said limited rotational movement therebetween.
The combination as defined in claim 9 and further including radially extending stop means on said tongue member cooperable with said sleeve to limit extension of said tongue with respect to said frame.
The combination in claim 9 and further including powered fifth wheel positioning and support means between said frame and said fifth wheel, operable to shift said fifth wheel between a lowered non-coupling position and a raised trailer coupling and towing position.
A combination in claim 11 wherein said fifth wheel positioning and support means includes means for laterally shifting said support means between said frame and said fifth wheel assembly to support said fifth wheel in said raised position. The combination in claim 12 wherein said positioning and support means includes a pair of bracket members attached to said frame at opposite sides thereof, said bracket members being vertically and laterally shiftable relative to said frame and attached to said fifth wheel; and said laterally shifting means including power means operably connected between said bracket members for shifting said bracket members laterally between said frame and said fifth wheel assembly for supporting same in said raised position.
Dollies of various types for hauling semi-trailers are used currently by the trucking industry. They provide a certain flexibility relative to hauling two shorter trailers, for example, or one long trailer.
Unfortunately, these conventional dollies must normally be custom made for each truck manufacturer. Also, they require use of a round axle as opposed to square, rectangular, or other shaped axles. And, as is well known in the industry, use of such a dolly fixedly coupled to a tractor in tandem fashion presents traction difficulties, especially on rough or uneven terrain or over a street curb, because of the tendency of the dolly to lift a drive wheel partially or completely off the ground.
Because of these factors, among others, present use of such dollies results in significant disadvantages as well as advantages. It provides a converter dolly that not only has the usual advantages but also removes disadvantages of conventional units.
The novel dolly need not be custom made in various forms to suit the truck tractors of several manufacturers. It is not limited to round axle constructions. It enables effective tractor traction even on uneven or rough terrain, or over curbs. The novel dolly has a special extensible-retractable draw tongue assembly for alternate use on the rear of a trailer and on the rear of a tractor.
The novel dolly, has a construction such that, when it is coupled to a tractor, limited rotational capacity is effected relative to its tongue, enabling the wheeled axle assembly thereof to accommodate uneven terrain without lifting tractor drive wheels off the ground surface.
The novel dolly provides a fifth wheel shiftable between a lowered, collapsed non-support position, and a specially supported elevated hauling and support position.
These and other objects, advantages, and features of the invention will be apparent upon studying the following specification with the drawings.
Truck tractor 12 includes a conventional cab 34, a front axle subassembly 36, and a rear axle subassembly 38, the latter being powered by a suitable engine not shown through a drive shaft mechanism The tractor has a fifth wheel assembly 32 which is forwardly and rearwardly slidably adjustable, preferably of the type in U. Thus, it can be shifted from the forward position illustrated by the phantom lines in FIG.
Trailer 14, shown as an illustration of the single or front trailer, is depicted as having a single rear axle mechanism 30, and a conventional landing gear Obviously the rear axle could be dual as is illustrated on trailer 16 at 31, and the landing gear could vary. Trailer 16 also has a landing gear Both trailers 14 and 16 have a depending conventional king pin on the front end thereof, as shown for example at 15 on trailer 16 FIG. Dolly assembly 10 includes a frame subassembly 60, a fifth wheel subassembly 70, a wheeled axle subassembly 80, and an extensible-contractable forwardly extending draw tongue subassembly Framework subassembly 60 includes a pair of forwardly and rearwardly extending, laterally positioned, spaced, side beams 62, each of shape in cross section, interconnected by rear cross-tie 64, central cross-tie 66 and front cross-tie The front end of the frame includes a pair of diagonally inwardly and rearwardly oriented members 69a and 69b.
These define a generally V-shaped, forwardly facing, receiving and aligning recess for cooperation with the rear end of a truck tractor frame interconnected therewith. Selection and Ordering Guides. Where to Buy. Pre-Pay Freight Web Rater. Goldline Quality Parts. Service Literature. Supplier Portal. Important Updates. Trade Shows. Company Information. Company Store. Media Relations.
Worldwide Contacts. Human Resources. Features and Benefits. Driver Coupling Assist - Red Light Illumination A failed coupling attempt triggers daytime-visible red flashing warning LED lights on both sides of the fifth wheel to alert drivers that the vehicle is not ready for motion. Print Page.
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