Spring device

Patent metadata

Field	Value
Publication number	US-10519938-B2
Application number	US-201715695451-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 5, 2016
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A spring device for the motion drive of a movable component from a rest position into a displaced position includes a gas spring and a preloaded spring, the movable component being loaded into the displaced position by a preloaded spring. The gas spring includes a pressurized gas-filled cylinder with a first end closed by a first end plate and a second end closed by a second end plate. A piston divides the interior of the cylinder into a first working chamber and a second working chamber. The piston having a first piston rod extending through the first working chamber and through the first end plate in a sealed manner, a free end of the first piston rod being fixed to the movable component or a stationary component, and a second piston rod extending through the second working chamber and through the second end plate in a sealed manner.

First claim

The invention claimed is:

1. A spring device for the motion drive of a movable component from a rest position into a displaced position, comprising:
a preloaded spring configured to urge the movable component from the rest position of the movable component into the displaced position of the movable component, the preloaded spring is under a greater tension in the rest position than in the displaced position,
a gas spring including a pressurized gas-filled cylinder filled with a gas under pressure, the cylinder having a first end closed by a first end plate and a second end closed by a second end plate, the gas spring further including an axially displaceable piston subdividing an interior of the cylinder into a first working chamber and a second working chamber, the first working chamber and the second working chamber being connected to each other via a restrictor, a first piston rod connected to the piston and extending through the first working chamber, the first piston rod being led to the outside of the cylinder through the first end plate in a sealed manner, the first piston rod having free end connectable to one of the movable component or a stationary component, and a second piston rod connected to the piston and extending through the second working chamber, the second piston rod being led to the outside of the cylinder through the second end plate in a sealed manner, wherein the first piston rod and the second piston rod have the same cross section, and
wherein the piston interacts with the first end plate at the displaced position of the movable component and interacts with the second end plate in the rest position of the movable component.

2. The spring device according to claim 1 , wherein an end of the cylinder that faces away from the first piston rod is connectable to the other of the movable component or the stationary component.

3. The spring device according to claim 1 , wherein the free end of the second piston rod is connectable to the other of the movable component or the stationary component.

4. The spring device according to claim 1 , wherein the restrictor is a restrictor bore passing axially through the piston.

5. The spring device according to claim 1 , wherein the restrictor is an axial restrictor groove in the inner wall of the cylinder.

6. The spring device according to claim 1 , further comprising a guide tube connected coaxially to the cylinder and extending from the cylinder on a side of the cylinder facing away from the first piston rod.

7. The spring device according to claim 1 , wherein the movable component is a flap that can be pivoted about a pivot axis, the first piston rod and the preloaded spring are connected to the flap or to a component connected to the flap, in each case at a distance from the pivot axis.

8. The spring device according to claim 1 , wherein the preloaded spring is a mechanical tension spring.

9. The spring device according to claim 1 , wherein the preloaded spring is a compression spring.

10. The spring device according to claim 9 , wherein the compression spring is a helical compression spring, which encloses the cylinder and the first piston rod coaxially with a radial clearance and includes a first end supported on a region of the first piston rod projecting out of the cylinder and a second end supported on the cylinder or a component connected to the cylinder.

11. The spring device according to claim 6 , wherein the preloaded spring is a helical compression spring that encloses the guide tube with a radial clearance.

12. The spring device according to claim 1 , further comprising a first supporting disk resting on a side of the first end plate that faces the first working chamber and a second supporting disk resting on a side of the second end plate that faces the second working chamber, the piston contacts the first supporting disk in the displaced position and the piston contacts the second supporting disk in the rest position.

13. The spring device according to claim 6 , wherein a free end of the second piston rod is disposed in the guide tube.

14. The spring device according to claim 1 , wherein the free end of the first piston rod has a first connection element and the free end of the first piston rod is connectable to the one of the movable component or the stationary component by the first connection element, the end of the cylinder that faces away from the first piston rod has a second connection element and is connectable to the other of the movable component or the stationary component by the second connection element, and a free end of the second piston rod is a floating end.

Assignees

• Stabilus Gmbh

Inventors

• Hewel Michael
• Darscheid Karl-Heinz

Classifications

• F16F13/007

  the damper being a fluid damper · CPC title

• F03G1/10 Primary

  for producing output movement other than rotary, e.g. vibratory · CPC title

• E05F3/02

  with pneumatic piston brakes (rotary type E05F3/14) · CPC title

• F16F9/0218

  Mono-tubular units (F16F9/0227, F16F9/0236, F16F9/0245 take precedence) · CPC title

• F16F9/3207

  Constructional features (F16F9/34 - F16F9/50 take precedence; assembly or repair F16F9/3271) · CPC title