Anti-fall mechanism for lifting equipment

Patent metadata

Field	Value
Publication number	US-10717635-B2
Application number	US-201715692177-A
Country	US
Kind code	B2
Filing date	Aug 31, 2017
Priority date	Aug 23, 2017
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

A lifting equipment is provided. The lifting equipment may include a working assembly, a safety assembly, and a shaft assembly. The working assembly may include a working fastener. The working fastener may be spirally connected to the shaft assembly. When the shaft assembly rotates the working fastener may move along the shaft assembly. The safety assembly may comprise a limiting component. The limiting component may be connected to the working fastener. A portion of the safety assembly may be in located a space between the limiting component and the working assembly.

First claim

What is claimed is:

1. A system comprising:
a working assembly;
a safety assembly;
a shaft assembly; and
a load lifting mechanism, wherein
the working assembly is configured to support the load lifting mechanism when the working assembly is coupled to the load lifting mechanism;
the safety assembly is configured to prevent the load lifting mechanism from falling when the working assembly fails and the safety assembly is coupled to the load lifting mechanism;
the working assembly is connected to the shaft assembly, and the safety assembly is connected to the shaft assembly;
the safety assembly comprises a safety fastener and a limiting component, wherein the safety fastener is configured to move along the shaft assembly and is immobile relative to the load lifting mechanism in a first configuration, and the safety fastener is configured to rotate with the shaft assembly in a second configuration; and
projection of the safety fastener and projection of the limiting component in a plane perpendicular to the shaft assembly at least partially overlap.

2. The system of claim 1 , wherein the working assembly comprises a working fastener configured to drive the load lifting mechanism to move along the shaft assembly when the working fastener is engaged with the shaft assembly.

3. The system of claim 2 , wherein the safety fastener is configured to support the load lifting mechanism when the working fastener is disengaged from the shaft assembly.

4. The system of claim 3 , wherein the safety fastener is a safety nut, and the working fastener is a working nut.

5. The system of claim 4 , wherein the shaft assembly is a screw thread rod or a ball screw rod.

6. The system of claim 3 , wherein
the load lifting mechanism comprises a first fastener surface and a second fastener surface;
the working fastener comprises a first connecting portion and a first fastener portion, the first connecting portion is connected to the shaft assembly, and the first fastener portion is connected to the first fastener surface; and
the safety fastener comprises a second connecting portion, the second connecting portion is connected to the shaft assembly.

7. The system of claim 6 , wherein the limiting component is connected to the load lifting mechanism,
the safety assembly comprises a housing between the limiting component and the second fastener surface, wherein the housing accommodates at least a part of a second fastener portion of the safety fastener;
the safety assembly comprises a locking component, and
the safety assembly comprises an adapter, wherein the adapter is located in the housing and configured to guide the locking component.

8. The system of claim 7 , wherein the safety fastener has the first configuration in which the safety fastener is connected to the load lifting mechanism at the second fastener surface, and the safety fastener in the first configuration is immobile relative to the load lifting mechanism.

9. The system of claim 8 , wherein the safety fastener has the second configuration in which the safety fastener is disconnected from the load lifting mechanism and the working fastener is disengaged from the shaft assembly.

10. The system of claim 9 , wherein the safety fastener in the second configuration is immobile relative to the shaft assembly.

11. A lifting equipment comprising:
a working assembly;
a safety assembly; and
a shaft assembly, wherein
the working assembly comprises a working fastener, the working fastener is spirally connected to the shaft assembly, when the shaft assembly rotates the working fastener moves along the shaft assembly,
the safety assembly comprises a safety fastener and a limiting component, the limiting component is connected to the working fastener, wherein the safety fastener is configured to move along the shaft assembly and is immobile relative to the working fastener in a first configuration, and the safety fastener is configured to rotate with the shaft assembly in a second configuration, and
a portion of the safety assembly is in located a space between the limiting component and the working assembly.

12. The lifting equipment of claim 11 , wherein the safety assembly comprises a safety fastener, and the safety fastener is spirally connected to the shaft assembly.

13. The lifting equipment of claim 12 , wherein the safety assembly comprises a rotating component, and the rotating component is between the limiting component and the safety fastener.

14. The lifting equipment of claim 13 , wherein
one of the working assembly or the safety assembly has a first hole and the other has a locking component,
the locking component is in the first hole when the safety assembly is in the first configuration; and
the locking component is out of the first hole when the safety assembly is the second configuration.

15. The lifting equipment of claim 14 , wherein
the safety assembly comprises an adapter and an elastic component,
the adapter is between the limiting component and the safety fastener,
the elastic component is between the adapter and the limiting component, and
the elastic force of the elastic component is along the axis of the shaft assembly.

16. The lifting equipment of claim 15 , wherein
the adapter comprises a cavity,
the safety fastener comprises a through-hole,
when the safety fastener is in the first configuration, a first end of the locking component is in the cavity of the adapter and a second end of the locking component is in the through-hole of the safety fastener.

17. The lifting equipment of claim 16 , wherein the locking component comprises a protrusion, the protrusion of the locking component is between the first end of the locking component and the second end of the locking component.

18. The lifting equipment of claim 17 , wherein the protrusion of the locking component is between the elastic component and the safety fastener.

19. The lifting equipment of claim 11 , wherein the lifting equipment further comprises a load lifting mechanism, the load lifting mechanism is configured to support a load and the working fastener is connected to the limiting component through the load lifting mechanism.

20. A C-arm medical device comprising:
a lifting device, a C-arm frame, a radiation source, a detector, and a carrier, wherein
the lifting device comprises:
a working assembly;
a safety assembly; and
a shaft assembly, wherein
the working assembly comprises a working fastener, the working fastener is spirally connected to the shaft assembly, when the shaft assembly rotates the working fastener moves along the shaft assembly,
the safety assembly comprises a safety fastener and a limiting component, the limiting component is connected to the working fastener, wherein the safety fastener is configured to move along the shaft assembly and is immobile relative to the working fastener in a first configuration, and the safety fastener is configured to rotate with the shaft assembly in a second configuration, and

a portion of the safety assembly is located within a space between the limiting component and the working assembly.

Assignees

• Shanghai United Imaging Healthcare Co Ltd

Inventors

• Yu Yinmin

Classifications

• A61B6/08

  Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams · CPC title

• B66D5/22

  with axial effect · CPC title

• B66F11/00 Primary

  Lifting devices specially adapted for particular uses not otherwise provided for (ground-engaging vehicle fittings for supporting, lifting or manoeuvring the vehicle B60S9/00) · CPC title

• B66D5/16

  for action on ropes or cables · CPC title

• E04G3/32

  Hoisting devices; Safety devices · CPC title