Charging mechanism for charging a stored-energy spring of a stored-energy spring mechanism

Patent metadata

Field	Value
Publication number	US-11211206-B2
Application number	US-201816956680-A
Country	US
Kind code	B2
Filing date	Nov 22, 2018
Priority date	Dec 20, 2017
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A charging mechanism for charging a stored-energy spring of a stored-energy spring mechanism includes a charging gear coupled to the stored-energy spring, an intermediate shaft coupled to the charging gear, an idler gear that can be driven by a charging motor, a freewheel coupled to the idler gear, and a dog clutch that couples the freewheel to the intermediate shaft in order to charge the stored-energy spring and uncouples same from the intermediate shaft in the charged state of the stored-energy spring. The dog clutch has a first clutch block coupled to the intermediate shaft for conjoint rotation, and a second clutch block connected to the freewheel. The first clutch block can be displaced along an axis of rotation of the intermediate shaft between two end positions and, in an intermediate position between the end positions can be freely rotated only in a direction of rotation with respect to the second clutch block.

First claim

The invention claimed is:

1. A tensioning mechanism for tensioning an accumulator spring of a spring stored energy mechanism, the tensioning mechanism comprising:
a tensioning gear coupled to the accumulator spring;
an intermediate shaft coupled to said tensioning gear;
an intermediate gear to be driven by a tensioning motor;
a freewheel coupled to said intermediate gear; and
a dog clutch disposed to couple said freewheel to said intermediate shaft in order to tension the accumulator spring and to decouple said freewheel from said intermediate shaft in a tensioned state of the accumulator spring;
said dog clutch having a first clutch block fixedly coupled to said intermediate shaft so as to rotate with said intermediate shaft and a second clutch block connected to said freewheel;
said first clutch block being displaceable between two end positions along a rotational axis of said intermediate shaft, and having a plurality of first dogs which face toward said second clutch block and are arranged around said intermediate shaft;
said second clutch block having a plurality of second dogs facing toward said first clutch block; and
said first clutch block being configured to assume an intermediate between the two end positions, and in the intermediate position of said first clutch block, each of said second dogs protruding into an intermediate space between two adjacent first dogs, having a stop face for one of said two adjacent first dogs, on which stop face a side face of said first dog bears when said first clutch block is rotated with respect to said second clutch block in a first rotational direction about the rotational axis, and forming a ramp for another of said two adjacent first dogs, on which ramp said first dog slides when said first clutch block is rotated with respect to said second clutch block about the rotational axis in a second rotational direction opposite the first rotational direction; and
a coupling element connected to said first clutch block and guided through a transverse opening in said intermediate shaft, said transverse opening running perpendicularly with respect to the rotational axis of said intermediate shaft, and said coupling element being displaceable in said transverse opening parallel to the rotational axis of said intermediate shaft between a first position, defining one of said two end positions of said first clutch block, and a second position, defining another of said two end positions of said first clutch block.

2. The tensioning mechanism according to claim 1 , wherein said first dogs are arranged equidistantly with respect to one another and at an identical spacing from the rotational axis, and wherein said second dogs are arranged equidistantly with respect to one another and at the same spacing from the rotational axis as said first dogs.

3. The tensioning mechanism according to claim 1 , wherein said first clutch block has four first dogs, and said second clutch block has four second dogs.

4. The tensioning mechanism according to claim 1 , wherein said coupling element is a tube or a bolt having a longitudinal axis extending perpendicularly with respect to the rotational axis of said intermediate shaft, and having ends protruding into recesses formed in said first clutch block.

5. The tensioning mechanism according to claim 1 , further comprising a switching pin displaceably mounted in a longitudinal opening in said intermediate shaft and coupled to said coupling element, said longitudinal opening running along the rotational axis of said intermediate shaft.

6. The tensioning mechanism according to claim 5 , wherein said switching pin has a resetting end protruding out of said longitudinal opening, and further comprising a resetting element arranged on said tensioning gear, said resetting element displacing said resetting end of said switching pin toward said longitudinal opening in the tensioned state of the accumulator spring, and causing said coupling element to be displaced from the first position to the second position.

7. The tensioning mechanism according to claim 6 , wherein said resetting element has a contact end that projects radially from said tensioning gear and a contact face that bears against said resetting end of said switching pin when said switching pin is being displaced.

8. The tensioning mechanism according to claim 1 , wherein each of said first and second clutch blocks runs annularly around said intermediate shaft.

9. The tensioning mechanism according to claim 1 , further comprising a restoring spring coupled to said first clutch block and configured to exert a spring force on said first clutch block in a direction of said second clutch block.

10. The tensioning mechanism according to claim 1 , wherein said freewheel has a freewheel inner ring which runs around said intermediate shaft, and said second clutch block is connected to said freewheel inner ring.

11. The tensioning mechanism according to claim 1 , wherein said intermediate gear is configured to be driven via a bevel gear mechanism by way of the tensioning motor.

12. The tensioning mechanism according to claim 1 , further comprising a locking mechanism for releasably locking said tensioning gear in the tensioned state of the accumulator spring.

13. The tensioning mechanism according to claim 12 , wherein said locking mechanism has a cam disk roller fixedly connected to said tensioning gear, and a pawl fixing said cam disk roller in order to lock said tensioning gear.

14. A spring stored energy mechanism, comprising a tensioning mechanism according to claim 1 .

Assignees

• Siemens Ag
• Siemens Energy Global Gmbh & Co Kg

Inventors

• Binner Lukas
• Loebner Friedrich

Classifications

• F16H33/06

  based essentially on spring action · CPC title

• F16D41/185

  the engaging movement having an axial component · CPC title

• H01H3/3005 Primary

  Charging means · CPC title

• H01H33/40

  using spring motor · CPC title

• H01H3/3021 Primary

  using unidirectional coupling · CPC title