Door component comprising a controllable damping device

Patent metadata

Field	Value
Publication number	US-11236537-B2
Application number	US-201615746504-A
Country	US
Kind code	B2
Filing date	Jul 21, 2016
Priority date	Jul 21, 2015
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A door component has a controllable damping device and contains a magnetorheological fluid. Two connection units are movable relative to one another. One of the two connection units is connected to a support structure and the other one to a pivotable door unit. The device damps a movement of the door unit between a closed position and an open position in a controlled manner by way of a control unit. The magnetorheological damping device has a piston unit and a cylinder unit surrounding the piston unit. The piston unit divides a cylinder volume into two chambers. The piston unit is equipped with a first one-way valve. The two chambers are connected together, via an external return channel equipped with at least one controllable magnetorheological damping valve, to form a one-way circuit. When the piston unit moves in and out, the magnetorheological fluid flows through the piston unit in the same flow direction.

First claim

The invention claimed is:

1. A door component for providing damping to a movable door, the door component comprising:
a controllable magnetorheological damper device containing a magnetorheological fluid and including two connector units that are movable relative to one another;
one of said two connector units being connectable to a supporting structure of the door and the other of said two connector units being connectable to the door to effect a controlled damping of a movement of the door at least partially between a closed position and an open position;
said magnetorheological damper device being disposed to damp relative movement between said two connector units, said magnetorheological damper device including a piston unit and a cylinder unit surrounding said piston unit, said piston unit dividing a cylinder volume in said cylinder unit into two chambers;
said piston unit having a first one-way valve and said two chambers being fluidically connected to one another by way of a return channel and a magnetorheological damping valve, said return channel and said magnetorheological damping valve forming a one-way circuit through which the magnetorheological fluid flows in one given flow direction through said piston unit from one of the two chambers to the other of the two chambers during a movement of said piston unit in one direction and also during a movement of said piston unit in an opposite direction.

2. The door component according to claim 1 , configured for a vehicle, wherein said one connector unit is connected to a frame of the vehicle and the other said connector unit is connected to a door of the vehicle.

3. The door component according to claim 1 , which comprises a chamber forming a compensation volume on a low-pressure side of said damping valve.

4. The door component according to claim 1 , wherein said piston unit comprises a continuous piston rod having two ends each guided out of said cylinder unit to the outside.

5. The door component according to claim 1 , wherein said damping valve is formed with a flow channel through which the magnetorheological fluid can flow, wherein a magnet device is disposed in a vicinity of said flow channel to subject the magnetorheological fluid in said flow channel to a variable magnetic field to thereby influence a flow resistance of said flow channel and thus a damping action of said damper device by way of the magnetic field in the flow channel.

6. The door component according to claim 1 , wherein said two chambers include a first chamber connected to said damping valve, and a second chamber connected to said damping valve via a second one-way valve.

7. The door component according to claim 6 , wherein said piston unit has a first piston rod, which extends through said first chamber, and a second piston rod, which extends through said second chamber.

8. The door component according to claim 7 , wherein said first and second two piston rods are each led out of the cylinder volume and/or said cylinder unit to the outside.

9. The door component according to claim 7 , wherein one of said piston rods is a telescopic rod having a first end fastened to said piston and a second end fixedly connected to said cylinder unit.

10. The door component according to claim 7 , wherein said first and second piston rods have the same diameter.

11. The door component according to claim 1 , wherein said damper device comprises at least one compensation device.

12. The door component according to claim 11 , wherein said compensation device comprises a compressible compensation volume.

13. The door component according to claim 7 , wherein one of said first and second two piston rods serves as an electrical connector unit, and which comprises at least one connection cable guided on one of said piston rods.

14. The door component according to claim 7 , which comprises a tube outside said cylinder unit, said tube being formed with at least one slot, and wherein at least one of said first and second two piston rods is received, outside said cylinder unit, displaceably in said tube.

15. The door component according to claim 7 , wherein said tube forms a part of one of said connector units.

16. The door component according to claim 1 , wherein said damper device comprises at least one sensor device having a part thereof fastened to said piston rod.

17. The door component according to claim 16 , wherein said sensor device comprises a friction wheel configured to detect a relative movement of said two connector units with respect to one another.

Assignees

• Inventus Eng Gmbh

Inventors

• Battlogg Stefan
• Mayer Markus

Classifications

• E05C17/006 Primary

  with means for detecting obstacles outside the doors · CPC title

• F16D57/002

  comprising a medium with electrically or magnetically controlled internal friction, e.g. electrorheological fluid, magnetic powder · CPC title

• E05Y2400/21

  by controlling the viscosity · CPC title

• E05F5/00

  Braking devices, e.g. checks; Stops; Buffers (construction of pneumatic or liquid braking devices E05F3/00; braking devices, buffers or end stops on drawers for tables, cabinets or like furniture A47B88/473; combined with devices for holding wings open E05C17/00; devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing E05C17/04) · CPC title

• E05Y2201/21

  Brakes · CPC title