Low-construction trolley for wire rope hoist

Patent metadata

Field	Value
Publication number	US-10526175-B2
Application number	US-201515113361-A
Country	US
Kind code	B2
Filing date	Jan 23, 2015
Priority date	Jan 24, 2014
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A low-construction hoist for a wire rope hoist is arranged to move along a lower flange of a horizontal beam or rail. The trolley includes a trolley frame; bearing wheels, which are fixed to the trolley body and arranged to move on the upper surface of the lower flange of the rail, a hoisting mechanism including a rope drum for a hoisting rope, a hoisting member in cooperation with the hoisting rope for hoisting a load, and a hoisting motor for driving the rope drum; whereby the rope drum is supported to a first side of the trolley frame so that the axle of the rope drum is parallel to the rail, and the hoisting member is arranged to move under the rail; whereby the hoisting rope is led from the rope drum to a fixing point in the trolley frame through at least a rope pulley arrangement of the hoisting member, whereby the fixing point of the hoisting rope to the trolley frame is located in the longitudinal direction of the trolley outside the end of the rope drum, or outside the vertical plane which is transverse in relation to the rail or beam and passing through the end of the rope drum.

First claim

The invention claimed is:

1. A low-construction trolley for a wire rope hoist, arranged to travel along a lower flange of a horizontal beam or rail, the trolley comprising:
a trolley frame;
bearing wheels that are attached to the frame of the trolley and arranged to travel on an upper surface of the lower flange of the beam or rail, and at least some of which are driven wheels to move the trolley;
a hoisting mechanism comprising a rope drum for a hoisting rope, a hoisting member in cooperation with the hoisting rope for hoisting a load, and a hoisting motor for driving the rope drum;
wherein the rope drum is supported to a first side of the trolley frame so that the axle of the rope drum is parallel to the beam or rail, and the hoisting member is arranged to move under the beam or rail;
wherein the hoisting rope is led from the rope drum to a fixing point in the trolley frame through at least a rope pulley arrangement of the hoisting member, and
wherein the fixing point of the hoisting rope to the trolley frame is located in the longitudinal direction of the trolley, respectively beam or rail, outside a longitudinal end of the rope drum.

2. The trolley as claimed in claim 1 , wherein the fixing point of the hoisting rope to the trolley frame is located in the longitudinal direction of the trolley, respectively beam or rail, at a distance from the end of the rope drum.

3. The trolley as claimed in claim 1 , wherein the distance of the fixing point from the end of the rope drum, or the vertical plane which is transverse in relation to the rail or beam and passing through the end, is approximately 0-1.5 times the diameter of the rope drum.

4. The trolley as claimed in claim 1 , wherein the hoisting rope is led from the rope drum through the rope pulley arrangement of the hoisting member, and through at least one sheave on at least one side of the trolley frame to a fixing point in the trolley on the same side as the rope drum.

5. The trolley as claimed in claim 4 , wherein the fixing point of the hoisting rope to the trolley frame is at a same vertical plane as a disengagement point of the hoisting rope from the rope drum, as seen in the line parallel to the axle of the rope drum and parallel to the rail.

6. The trolley as claimed in claim 1 , wherein the hoisting rope is led from the rope drum through the rope pulley arrangement of the hoisting member, and through sheaves on both sides of the trolley frame to the fixing point in the trolley on the opposite side in relation to the rope drum.

7. The trolley as claimed in claim 1 , wherein a second fixing point of the hoisting rope to the rope drum is located on a side of a rope drum end opposite of the longitudinal end of the rope drum closer to which the fixing point of the hoisting rope to the trolley frame is located.

8. The trolley as claimed in claim 1 , wherein the fixing point of the hoisting rope to the frame of the trolley is located at a chosen distance above a horizontal plane passing through the axle of the rope drum, at the same height as the disengagement point of the hoisting rope from the rope drum at the highest position of the hoisting member.

9. The trolley as claimed in claim 1 , wherein the hoisting motor is placed under the beam or rail and at least partly on a different side than the rope drum, in relation to the vertical plane passing through the contact lines of the bearing wheels on the rope drum side, touching the lower flange of the beam or rail.

10. The trolley as claimed in claim 9 , wherein the hoisting motor is placed under the beam or rail and at least partly on a different side in relation to the vertical plane passing through the centre of the beam or rail than the rope drum.

11. The hoisting motor as claimed in claim 10 , wherein the hoisting motor is placed at the same vertical plane as the beam or rail, whereby the vertical plane passing through the middle of the beam or rail is passing through the longitudinal centre line of the hoisting motor.

12. The trolley as claimed in claim 10 , wherein the hoisting motor is placed so that a longitudinal centre line of the hoisting motor is parallel to the longitudinal direction of the rail or beam.

13. The trolley as claimed in claim 10 , wherein the gear that interconnects the hoisting motor and the rope drum is arranged so that the hoisting motor and the rope drum are on the same side in relation to the gear, whereby the hoisting motor, gear, and rope drum are in a C form, as seen from the above.

14. The trolley as claimed in claim 9 , wherein the hoisting motor is placed so that a longitudinal centre line of the hoisting motor is parallel to the longitudinal direction of the rail or beam.

15. The trolley as claimed in claim 9 wherein the gear that interconnects the hoisting motor and the rope drum is arranged so that the hoisting motor and the rope drum are on the same side in relation to the gear, whereby the hoisting motor, gear, and rope drum are in a C form, as seen from the above.

16. The trolley as claimed in claim 1 , wherein the rope drum with frame parts of the rope drum and the hoisting motor linked to the rope drum and located at the desired place, are secured to one corner of the trolley frame by a separate joint, which is located closer to that end of the rope drum from the side of which the hoisting rope comes out when the hoisting member is at the highest position of the hoisting member.

17. The trolley as claimed in claim 16 , wherein the joint is on both sides in contact with longitudinal stiffening members, which for their part connect to the rope drum and trolley at another location.

18. The trolley as claimed in claim 1 , wherein the fixing point of the hoisting rope to the trolley frame is located in a position outside a space between two planes defined by longitudinal ends of the rope drum respectively, and beyond the longitudinal end of the rope drum that is closer to the hoisting member than the other longitudinal end of the rope drum, in a longitudinal direction of the rope drum.

Assignees

• Konecranes Global Corp

Inventors

• Lindberg Teppo
• Kokko Henri

Classifications

• B66D1/14

  Power transmissions between power sources and drums or barrels {(including brakes, one-way brakes, one-way clutches, clutches activated alternately with brakes, fixed ratio gearing unless otherwise provided for in B66D1/16 - B66D1/24)} · CPC title

• B66D1/12

  incorporating electric motors · CPC title

• B66C11/06 Primary

  running on monorails (overhead railway systems B61B) · CPC title

• B66C9/14 Primary

  Trolley or crane travel drives (rope, cable, or chain drives for loads or trolleys B66C11/16; control B66C13/18) · CPC title

• B66D1/36

  Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains · CPC title