초록 ▼

Towing apparatus comprising a towing vehicle and a lifting frame that supports one end of a towed vehicle off the ground and is connected to the towing vehicle through a thrust reversal system, comprising one or more thrust reversal mechanisms, each having a rear lever arm fixed at its rear end port

Towing apparatus comprising a towing vehicle and a lifting frame that supports one end of a towed vehicle off the ground and is connected to the towing vehicle through a thrust reversal system, comprising one or more thrust reversal mechanisms, each having a rear lever arm fixed at its rear end portion to the lifting frame, a front lever arm fixed to the main frame of the towing apparatus only at a position forward of a rear wheel axle of the towing vehicle and intermeshing gears, fixed to the rear end portion of the front lever arm and the front end portion of the rear lever arm, respectively. A bracket resting on but not directly connected to the main frame of the towing vehicle near its rear wheel axle holds two pivot rods about which the intermeshing gears are rotatably mounted for simultaneous opposite rotation. This relatively simple structure overcomes the tendency of the load of a wrecked vehicle on the lifting frame to lift the front end of the towing vehicle about a pivot axis defined by a pair of rear wheels mounted on the rear wheel axle of the towing vehicle.

대표청구항 ▼

A towing apparatus for lifting and towing a heavy load, comprising a towing vehicle having a vehicle body, a main frame for said vehicle body comprising a plurality of longitudinally extending main frame elements, a front wheel axle supported by a forward portion of said main frame, at least one rea

A towing apparatus for lifting and towing a heavy load, comprising a towing vehicle having a vehicle body, a main frame for said vehicle body comprising a plurality of longitudinally extending main frame elements, a front wheel axle supported by a forward portion of said main frame, at least one rear wheel axle supported by a rear portion of said main frame, a lifting frame extending rearward of said main frame and supported for longitudinal movement relative to said main frame and for pivotal movement in a vertical direction about a transverse axis relative to said main frame, a thrust reversal system comprising at least one bracket, said bracket supporting a front pivot rod and a rear pivot rod, a front lever member having front and rear end portions and pivoted at its rear end portion to said front pivot rod, and a rear lever member having front and rear end portions and pivoted at its front end portion to said rear pivot rod, said front lever member having a front end portion fixed to said main frame forward of said rear wheel axle and a front thrust reversal member fixed to said rear end portion of said front lever member for pivoting about said front pivot rod, said rear end portion of said rear lever member attached to said lifting frame and said front end portion of said rear lever member provided with a rear thrust reversal member fixed to said front end portion of said rear lever member for pivoting about said rear pivot rod, said thrust reversal members being constructed and arranged to cooperate with one another so that when a load supported on said lifting frame pivots said lifting frame downward, said rear thrust reversal member attached to the front end portion of said rear lever member tends to rotate in one direction about said rear pivot road and to mesh with said front thrust reversal member attached to the rear end portion of said front lever member so that said front thrust reversal member tends to rotate in a direction opposite said one direction about said front pivot rod and causes the front end portion of said front lever member to apply a downward moment of force to said main frame sufficiently forward of said rear wheel axle to overcome a tendency of a moment of force that would be applied by said load to lift the front wheel axle of said towing vehicle in the absence of said cooperating thrust reversal members.