Elevator having a braking device

Patent metadata

Field	Value
Publication number	US-10093516-B2
Application number	US-201515301478-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Apr 4, 2014
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

An elevator may include a braking device such as a safety gear system or a service brake, for instance. The braking device may include a hydraulically-acting brake for braking an elevator car of the elevator. The braking device may further include a hydraulic unit with a pump assembly, a brake cylinder assembly, and a valve assembly for ventilating the brake. Further, the hydraulic unit may be fastened to the braking device.

First claim

What is claimed is:

1. An elevator including a braking device that comprises:
a hydraulically-acting brake for braking an elevator car of the elevator; and
a hydraulic unit that is fastened to the braking device and includes a pump assembly, a brake cylinder assembly, and a valve assembly for hydraulically ventilating the hydraulically-acting brake, wherein the brake cylinder assembly includes a piston that is displaceable in a cylinder and divides an interior space of the cylinder into a first chamber and a second chamber, wherein the piston is prestressed in a sprung fashion by a spring disposed in the second chamber, wherein the valve assembly includes a valve such that in a first switched state the valve hydraulically ventilates the hydraulically-acting brake,
wherein in the first switched state of the valve the first chamber of the cylinder is connected to the pump assembly so as to deliver hydraulic oil to the first chamber of the cylinder of the brake cylinder assembly,
wherein in a second switched state of the valve the second chamber of the cylinder is connected to the pump assembly so as to deliver hydraulic oil to the second chamber of the cylinder of the brake cylinder assembly, wherein in the second switched state of the valve both the spring and pressurized hydraulic oil in the second chamber act on the piston to activate the hydraulically-acting brake.

2. The elevator of claim 1 further comprising a common housing that receives the pump assembly, the brake cylinder assembly, and the valve assembly.

3. The elevator of claim 1 wherein the braking device further comprises a base body to which the hydraulic unit is fastened.

4. The elevator of claim 1 wherein the pump assembly includes a submersible pump.

5. The elevator of claim 1 wherein the valve of the valve assembly is a 3/2-way valve.

6. The elevator of claim 1 wherein the valve assembly includes at least two valves that are connected in parallel.

7. The elevator of claim 1 wherein the hydraulic unit includes a closed hydraulic oil circuit.

8. The elevator of claim 7 wherein the hydraulic circuit is configured to conduct hydraulic oil that escapes from the cylinder of the brake cylinder assembly to the pump assembly.

9. A braking device comprising:
a base body;
a hydraulically-acting brake; and
a hydraulic unit that is fastened to the base body and comprises
a pump assembly, and
a brake cylinder assembly that includes a piston that is displaceable in a cylinder, wherein the piston divides an interior space of the cylinder into a first chamber and a second chamber, wherein the piston is biased by a spring disposed in the second chamber, wherein hydraulic oil disposed in the second chamber is configured to exert a force on the piston.

10. The braking device of claim 9 wherein the hydraulic oil in the second chamber is pressurized.

11. The braking device of claim 9 wherein the hydraulic unit further comprises a valve assembly with a valve, wherein in a first switched state of the valve the first chamber of the cylinder is hydraulically connected to the pump assembly such that the pump assembly delivers hydraulic oil to the first chamber of the cylinder of the brake cylinder assembly, wherein in a second switched state of the valve the second chamber of the cylinder is hydraulically connected to the pump assembly such that the pump assembly delivers hydraulic oil to the second chamber of the cylinder of the brake cylinder assembly, wherein in the second switched state of the valve both the spring and the hydraulic oil in the second chamber that is pressurized act on the piston to activate the hydraulically-acting brake.

12. The braking device of claim 9 wherein the pump assembly includes a submersible pump.

13. The braking device of claim 9 wherein the valve of the valve assembly is a 3/2-way valve.

14. The braking device of claim 9 wherein the valve is a first valve, wherein the valve assembly comprises a second valve with the same structure as the first valve, wherein the first and second valves are connected in parallel.

15. The braking device of claim 9 wherein the hydraulic unit includes a closed hydraulic oil circuit.

16. The braking device of claim 9 wherein the spring is a disk spring packet.

17. The braking device of claim 9 comprising a collecting container disposed between the brake cylinder assembly and the pump assembly.

18. The braking device of claim 17 comprising a valve disposed between the collecting container and the pump assembly.

Assignees

• Thyssenkrupp Elevator Ag
• Thyssenkrupp Ag

Inventors

• Kuczera Thomas
• Hoffmann Walter

Classifications

• F15B2211/30525

  Directional control valves, e.g. 4/3-directional control valve · CPC title

• B66B1/365

  mechanical · CPC title

• F04D13/08

  for submerged use · CPC title

• B66B5/18 Primary

  and applying frictional retarding forces · CPC title

• F15B11/08

  with only one servomotor · CPC title