Bottom block assembly

Patent metadata

Field	Value
Publication number	US-10947089-B2
Application number	US-201816136148-A
Country	US
Kind code	B2
Filing date	Sep 19, 2018
Priority date	Sep 19, 2018
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A bottom block assembly includes a bottom block defining a cavity and at least one opening passing through a portion of the bottom block. The assembly further includes a plurality of sheaves disposed at least partially within the cavity, each sheave having a central opening. The assembly further includes a sheave pin passing through the at least one opening in the bottom block and the central openings in the sheaves to rotatably couple the plurality of sheaves to the bottom block. The assembly further includes a plurality of captivating frame assemblies to be coupled to the plurality of sheaves, each of the plurality of captivating frame assemblies including a housing and a plurality of rollers rotatably mounted to the housing. Each captivating frame assembly is associated with a corresponding one of the sheaves. The assembly further includes a plurality of wires for coupling the plurality of captivating frame assemblies to the plurality of sheaves. Each wire is reeved around one of the sheaves and reeved through the corresponding captivating frame assembly.

First claim

What is claimed is:

1. A bottom block assembly comprising:
a bottom block defining a cavity and at least one opening passing through a portion of the bottom block;
a plurality of sheaves disposed at least partially within the cavity, each sheave having a central opening;
a sheave pin passing through the at least one opening in the bottom block and the central openings in the sheaves to rotatably couple the plurality of sheaves to the bottom block;
a plurality of captivating frame assemblies, each of the plurality of captivating frame assemblies including a housing and a plurality of rollers rotatably mounted to the housing, wherein each captivating frame assembly is coupled with a corresponding one of the sheaves; and
a plurality of wires, wherein each captivating frame assembly is linked to the corresponding one of the sheaves by one of the plurality of wires, and further wherein each wire is reeved around one of the sheaves and reeved through the corresponding captivating frame assembly.

2. The bottom block assembly of claim 1 , wherein each captivating frame assembly is a separate, individual assembly from each of the other captivating frame assemblies.

3. The bottom block assembly of claim 1 , wherein the housing of each captivating frame assembly includes a key slot extending through the housing.

4. The bottom block assembly of claim 3 , further comprising a key rod selectively received through each key slot of the plurality of captivating frame assemblies.

5. The bottom block assembly of claim 4 , wherein the key rod includes a rectangular cross-section.

6. The bottom block assembly of claim 4 , wherein the plurality of captivating frame assemblies are coupled together and are movable in unison with each other when the key rod is received within the key slot of each captivating frame assembly.

7. The bottom block assembly of claim 6 , wherein the plurality of captivating frame assemblies are movable relative to each other when the key rod is removed from the key slot of each captivating frame assembly.

8. The bottom block assembly of claim 1 , wherein each sheave is a separate, individual component from each of the other sheaves.

9. The bottom block assembly of claim 8 , wherein the sheave pin couples the plurality of sheaves together when the sheave pin is coupled to the bottom block, and wherein the plurality of sheaves are movable relative to each other and relative to the bottom block when the sheave pin is removed from the bottom block.

10. The bottom block assembly of claim 1 , wherein the plurality of rollers include two sheave rollers that are rotatably engaged with the corresponding sheave and five wire rollers that are rotatably engaged with the corresponding wire.

11. The bottom block assembly of claim 10 , wherein each captivating frame assembly further includes two biasing arms, wherein one biasing arm is coupled one of the wire rollers and the other biasing arm is coupled to another one of the wire rollers, and wherein the biasing arms bias the corresponding wire rollers into engagement with the wire.

12. The bottom block assembly of claim 1 , wherein the plurality of wires are reeved to be a single failure proof assembly.

13. The bottom block assembly of claim 1 , wherein a separate bearing is disposed within the central opening of each of the sheaves, each bearing having a bearing opening that is coaxial with the at least one opening of the bottom block.

14. A bottom block assembly comprising:
a plurality of sheaves;
a plurality of captivating frame assemblies, each of the plurality of captivating frame assemblies including a housing and a roller, wherein each captivating frame assembly is coupled with a corresponding sheave; and
a plurality of wires, wherein each captivating frame assembly is linked to the corresponding sheave by one of the plurality of wires, wherein each wire is reeved around one of the sheaves and reeved through the corresponding captivating frame assembly,
wherein each of the rollers is rotatably engaged with one of the wires, and
wherein each captivating frame assembly further includes a biasing arm coupled to the housing and the roller and configured to bias the roller into engagement with the wire.

15. The bottom block assembly of claim 14 , wherein each captivating frame assembly is a separate, individual assembly from each of the other captivating frame assemblies.

16. The bottom block assembly of claim 14 , wherein the housing of each captivating frame assembly includes a key slot extending through the housing.

17. The bottom block assembly of claim 16 , further including a key rod inserted through each key slot to couple the plurality of captivating frame assemblies together.

18. The bottom block assembly of claim 17 , wherein each captivating frame assembly and each corresponding sheave are separable from adjacent captivating frame assemblies and corresponding sheaves when the key rod is removed from each key slot, thereby uncoupling the bottom block assembly.

19. The bottom block assembly of claim 17 , wherein the key rod includes a rectangular cross-section.

20. The bottom block assembly of claim 14 , wherein the roller is a first roller, wherein each captivating frame assembly further includes a second roller coupled to the housing and rotatably engaged with the corresponding sheave.

Assignees

• Konecranes Global Corp

Inventors

• Waisanen Steven K

Classifications

• B66C1/34 Primary

  Crane hooks · CPC title

• B66C15/02

  for retaining load-engaging elements in the event of rope or cable breakage · CPC title

• B66D3/06

  with more than one pulley · CPC title

• B66C17/00

  Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports · CPC title