Pulley block having a covering element and method for mounting a covering element on a pulley block

Patent metadata

Field	Value
Publication number	US-10486949-B2
Application number	US-201615737519-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Jun 19, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A pulley block for tackles has a pulley surrounded by a covering hood having inlet and outlet openings for a load cable, with a covering element inserted into at least one of the openings and retained by a retaining strip reaching behind an edge of the opening. The covering element has an opening for the load cable that is less than the inlet and outlet opening in the covering hood. The covering element is divided into first and second covering parts such that to mount the covering element on the covering hood with the load cable in a reeved state, the first and second covering parts can be inserted into the inlet and outlet opening via the retaining strips of the first and second covering parts, then reach behind the edge of the inlet and outlet opening, and then be joined to form the covering element in a mounted state.

First claim

The invention claimed is:

1. A pulley block for hoists, having at least one cable pulley which is surrounded by a covering hood having inlet and outlet openings for a load cable, wherein a covering element is inserted into at least one of the inlet and outlet openings and is retained in the inlet and outlet opening by a retaining strip of the covering element which engages behind an edge of the inlet and outlet opening, the covering element has an opening for the load cable and the opening in the covering element is smaller than the inlet and outlet opening in the covering hood, wherein the covering element is divided at least into a first covering part and a second covering part that each include a part of the retaining strip in such a way that, in order to mount the covering element on the covering hood, while the load cable is in a reeved state, the first covering part and the second covering part can be inserted with their respective part of the retaining strip into the inlet and outlet opening, then engage behind the edge of the inlet and outlet opening and finally can be joined in order to form the covering element in a mounted installation state.

2. The pulley block as claimed in claim 1 , wherein the edge comprises a pair of lateral edges and, as seen in the circumferential direction of the cable pulley, the part of the retaining strip on the first covering part is allocated for one of the lateral edges and the part of the retaining strip on the second covering part is allocated for the other lateral edge.

3. The pulley block as claimed in claim 1 , wherein the first covering part and the second covering part are releasably connected to one another in the mounted installation state.

4. The pulley block as claimed in claim 1 , wherein the covering element is divided into the first covering part and the second covering part in a plane which is oriented in the radial direction of the cable pulley and extends in the region of the opening of the covering element.

5. The pulley block as claimed in claim 1 , wherein the inlet and outlet opening is slot-shaped and the covering element is displaceable in the inlet and outlet opening in the circumferential direction of the cable pulley.

6. The pulley block as claimed in claim 1 , wherein the covering element covers the inlet and outlet opening from the outside and engages inwardly around the edges of the inlet and outlet opening with the retaining strip.

7. The pulley block as claimed in claim 1 , wherein the covering element comprises a main strip, a web strip and the retaining strip which have an H-shaped cross-section, and the retaining strip lies with its guide surface against an inner surface of the covering hood in the region of the inlet and outlet opening.

8. The pulley block as claimed in claim 1 , wherein the covering element is widened at one end in the shape of a triangle to form a guide region which accommodates the opening for the load cable, said opening being formed as a channel.

9. The pulley block as claimed in claim 8 , wherein the covering element in the guide region is divided into the first covering part and the second covering part and the retaining strip in the guide region is arranged on the covering element.

10. The pulley block as claimed in claim 1 , wherein the pulley block comprises a lower block.

11. The pulley block as claimed in claim 10 , wherein the edge comprises a pair of lateral edges and, as seen in the circumferential direction of the cable pulley, the part of the retaining strip on the first covering part is allocated for one of the lateral edges and the part of the retaining strip on the second covering part is allocated for the other lateral edge.

12. The pulley block as claimed in claim 11 , wherein the first covering part and the second covering part are releasably connected to one another in the mounted installation state.

13. The pulley block as claimed in claim 12 , wherein the covering element is divided into the first covering part and the second covering part in a plane which is oriented in the radial direction of the cable pulley and extends in the region of the opening of the covering element.

14. The pulley block as claimed in claim 13 , wherein the inlet and outlet opening is slot-shaped and the covering element is displaceable in the inlet and outlet opening in the circumferential direction of the cable pulley.

15. The pulley block as claimed in claim 14 , wherein the covering element covers the inlet and outlet opening from the outside and engages inwardly around the edges of the inlet and outlet opening with the retaining strip.

16. The pulley block as claimed in claim 15 , wherein the covering element comprises a main strip, a web strip and the retaining strip which have an H-shaped cross-section, and the retaining strip lies with its guide surface against an inner surface of the covering hood in the region of the inlet and outlet opening.

17. The pulley block as claimed in claim 16 , wherein the covering element is widened at one end in the shape of a triangle to form a guide region which accommodates the opening for the load cable, said opening being formed as a channel.

18. The pulley block as claimed in claim 17 , wherein the covering element in the guide region is divided into the first covering part and the second covering part and the retaining strip in the guide region is arranged on the covering element.

19. A method for mounting the covering element on the pulley block of claim 1 , comprising:
introducing the first covering part with its part of the retaining strip into the inlet and outlet opening along the load cable;
displacing the first covering part in the axial direction of the cable pulley so that the part of the retaining strip of the first covering part engages behind an allocated portion of the edge of the inlet and outlet opening;
introducing the second covering part with its part of the retaining strip into a part of the inlet and outlet opening not occupied by the first covering part;
displacing the second covering part in the axial direction of the cable pulley so that the part of the retaining strip of the second covering part engages behind another allocated portion of the edge of the inlet and outlet opening that is opposite the allocated portion of the edge for the part of the retaining strip of the first covering part;
displacing the second covering part in the inlet and outlet opening in the circumferential direction of the cable pulley in the direction of the first covering part to form the opening for the load cable;
pushing the first covering part and the second covering part in the axial direction of the cable pulley towards one another; and
releasably connecting the first covering part and the second covering part together.

Assignees

• Konecranes Global Corp

Inventors

• Yao Rui
• Schulte Franz
• Zhao Dingyuan
• Schlieker Rene
• Bönker Thomas
• Imbusch Gereon
• Kohlenberg Thomas
• Moll Oliver

Classifications

• B66D3/06 Primary

  with more than one pulley · CPC title