Low Headroom Hook Block for Wire Rope Hoist

A wire rope hoist system for raising and lowering a load, the wire rope hoist system, comprising:

• a rotating drum having a spiral rope groove defined therein;
• a shaft operatively associated with the rotating drum;
• a motor configured to engage with and rotate the shaft;
• a hoisting rope affixed to the drum and configured to wind into and unwind from the spiral rope groove, one end of the hoisting rope attached to a fixed end point on a side of a hook block assembly opposite from the drum;
• a rope guide configured to mount around the rotating drum, the rope guide configured to move laterally relative to the rotating drum to keep the hoisting rope in the spiral rope groove when winding the hoisting rope into the rope groove or unwinding it from the rope groove;
• the hook block assembly having a first sheave assembly having a first side wall disposed in spaced apart relation to a second side wall, the first sheave assembly having a first end wall disposed in spaced apart relation to a second end wall, the first side wall having one or more first sheaves disposed thereon, the second side wall having one or more second sheaves disposed thereon, the first and second end walls having first openings disposed in substantial alignment, the hook block assembly having a second sheave assembly having a first side wall disposed in spaced apart relation to a second side wall, the second sheave assembly having a first end wall disposed in spaced apart relation to a second end wall, the first side wall having one or more first sheaves disposed thereon, the second side wall having one or more second sheaves disposed thereon, the first and second end walls having first openings disposed in substantial alignment, the hook block assembly having a crosshead having a central portion configured to support a hook therefrom, the crosshead having a first stud extending in a first direction and a second stud extending in a second direction opposite the first direction, the first and second studs sized to fit inside the aligned openings in the first and second end walls in the first sheave assembly and the aligned openings in the first and second end walls of the second sheave assembly, the hook block assembly having one or more spacers configured to be mounted on one of the first and second studs such that the position of the first and second sheave assemblies on the crosshead can be adjusted.

A wire rope hoist system with a low overhead hook block assembly, the wire rope hoist system comprising:

• a rotating drum having a spiral rope groove defined therein;
• a shaft operatively associated with the rotating drum;
• a motor configured to engage with and rotate the shaft;
• a hoisting rope affixed to the drum and configured to wind into and unwind from the spiral rope groove, one end of the hoisting rope attached to a fixed end point on a side of a hook block assembly opposite from the drum;
• a rope guide configured to mount around the rotating drum, the rope guide configured to move laterally relative to the rotating drum to keep the hoisting rope in the spiral rope groove when winding the hoisting rope into the rope groove or unwinding it from the rope groove;
• the hook block assembly having a first sheave assembly having a first side wall disposed in spaced apart relation to a second side wall, the first sheave assembly having a first end wall disposed in spaced apart relation to a second end wall, the first side wall having a sheave disposed thereon, the first and second end walls having first openings disposed in substantial alignment;
• a second sheave assembly having a first side wall disposed in spaced apart relation to a second side wall, the second sheave assembly having a first end wall disposed in spaced apart relation to a second end wall, the first side wall having a sheave disposed thereon, the first and second end walls having first openings disposed in substantial alignment;
• a crosshead having a central portion configured to support a hook therefrom, the crosshead having a first stud extending in a first direction and a second stud extending in a second direction opposite the first direction, the first and second studs sized to fit inside the aligned openings in the first and second end walls in the first sheave assembly and the aligned openings in the first and second end walls of the second sheave assembly;
• one or more spacers configured to be mounted on one of the first and second studs such that the position of the first and second sheave assemblies on the crosshead can be adjusted.