Suction device
The invention relates to a suction device ( 12 ) comprising a valve housing ( 18 ), a flexible partition wall ( 28 ) which runs in such a way that a control space ( 30 ) extends on one side and an intake side ( 21 ) lies on the other side, wherein the control space ( 30 ) is connected to the intake side ( 21 ) via a throttle passage ( 38 ), wherein the throttle passage ( 38 ) is formed in such a way that a flow resistance for flows is defined by the throttle passage ( 38 ) in such a way that, in the case of free suction, a negative pressure in relation to the intake side occurs in the control space ( 30 ) on account of the flow resistance. A sealing protrusion ( 44 ) protruding into the interior of the control space ( 30 ) and an associated seal seat ( 50 ) within the control space ( 30 ) are provided, wherein the sealing protrusion ( 44 ) and seal seat ( 50 ) are formed in such a way that, when the sealing protrusion ( 44 ) is placed against the seal seat ( 50 ), the flow path ( 40 ) through the throttle passage ( 38 ) into the control space ( 30 ) is interrupted within the control space ( 30 ).
1. Suction device ( 12 ) for holding objects in place through suction by means of negative pressure, having a valve device ( 10 ) comprising:
a valve housing ( 18 ) which encloses a valve interior ( 20 ) and which has a supply connection ( 26 ) for connecting to a vacuum supply, and an intake side ( 21 ),
a flexible partition wall ( 28 ) which runs so that a control space ( 30 ) extends on one side of the flexible partition wall ( 28 ) inside the valve housing ( 18 ), and that the intake side ( 21 ) lies on the other side of the flexible partition wall ( 28 ),
the control space ( 30 ) being connected to the supply connection ( 26 ) and the control space ( 30 ) is connected to the intake side ( 21 ) via a throttle passage ( 38 ) so that at free suction at a state of the intake side ( 21 ) which allows for free inflow a flow path ( 40 ) is provided from the intake side ( 21 ) through the throttle passage ( 38 ) into the control space ( 30 ) and continues from the control space ( 30 ) through the supply connection ( 26 ), and
the throttle passage ( 38 ) being formed so that a flow resistance for flows along the flow path ( 40 ) is defined by the throttle passage ( 38 ) so that, in the case of free suction at a state of the intake side ( 21 ) which allows for a free inflow, a negative pressure in relation to the intake side ( 21 ) occurs in the control space ( 30 ) on account of the flow resistance, and wherein the flexible partition wall ( 28 ) is designed so that it is deformable due to the negative pressure occurring in the control space ( 30 ) in the case of free suction, wherein
a sealing protrusion ( 44 ) protruding into the interior of the control space ( 30 ) and an associated seal seat ( 50 ) are provided within the control space ( 30 ),
the sealing protrusion ( 44 ) and the seal seat ( 50 ) are arranged so that upon deformation of the flexible partition wall ( 28 ) in the case of free suction,
the sealing protrusion ( 44 ) is placed against the seal seat ( 50 ),
the sealing protrusion ( 44 ) and the seal seat ( 50 ) are formed so that, when the sealing protrusion ( 44 ) is placed against the seal seat ( 50 ), the flow path ( 40 ) through the throttle passage ( 38 ) into the control space ( 30 ) is interrupted within the control space ( 30 ),
the throttle passage ( 38 ) is designed as a channel extending through the flexible partition wall ( 28 ) and opens with an outlet opening ( 48 ) into the control space ( 30 ), and
the sealing protrusion ( 44 ) and seal seat ( 50 ) are arranged so that, when the sealing protrusion ( 44 ) is placed against the seal seat ( 50 ), the outlet opening ( 48 ) is closed within the control space.
2. Suction device ( 12 ) according to claim 1 , wherein
the flexible partition wall ( 28 ) extends inside the valve housing so that the control space ( 30 ) extends on one side of the flexible partition wall ( 28 ) and an intake-side space ( 32 ) extends on the other side of the flexible partition wall ( 28 ), and
said intake-side space ( 32 ) is connected to the control space ( 30 ) by the throttle passage ( 38 ).
3. Suction device ( 12 ) according to claim 1 , wherein
a suction body ( 14 ) is provided for application to an object to be suctioned,
the suction body ( 14 ) is arranged on the valve housing ( 18 ), and
the flexible partition wall ( 28 ) extends within the suction body ( 14 ).
4. Suction device ( 12 ) according to claim 1 , wherein the sealing protrusion ( 44 ) has a recess ( 46 ) which is open toward the control space ( 30 ), including where said sealing protrusion is shaped as a funnel.
5. Suction device ( 12 ) according to claim 4 , wherein the throttle passage ( 38 ) opens into the recess ( 46 ).
6. Suction device ( 12 ) according to claim 1 , wherein the channel through the flexible partition wall ( 28 ) opens into the outlet opening ( 48 ) at a surface of the flexible partition wall ( 28 ) which faces the control space ( 30 ).
7. Suction device ( 12 ) according to at least claim 6 , wherein the flexible partition wall ( 28 ) has attachment areas ( 54 , 56 ), and the outlet opening ( 48 ) is arranged centrally between the attachment areas ( 54 , 56 ).
8. Suction device ( 12 ) according to claim 1 , wherein
the flexible partition wall ( 28 ) is designed and arranged to snap bistably into a first configuration and a second configuration,
in the first configuration, the sealing protrusion ( 44 ) is placed against the seal seat ( 50 ), and
in the second configuration, the sealing protrusion ( 44 ) is spaced apart from the seal seat ( 50 ).
9. Suction device ( 12 ) according to claim 1 , wherein the seal seat ( 50 ) is designed as a section ( 52 ) of the valve housing ( 18 ), said section ( 52 ) protruding into the control space ( 30 ).
10. Suction device ( 12 ) according to claim 1 , wherein the sealing protrusion ( 44 ) is arranged on the flexible partition wall ( 28 ), including being monolithically formed with the flexible partition wall ( 28 ).
11. Suction device ( 12 ) according to claim 1 , wherein
the sealing protrusion ( 44 ) is arranged on the valve housing ( 18 ) and protrudes into the control space ( 30 ), and
the seal seat ( 50 ) is arranged on the flexible partition wall ( 28 ).
12. Suction device ( 12 ) according to claim 1 , wherein the flexible partition wall ( 28 ) is designed and arranged in a tensioned manner so that the sealing protrusion ( 44 ) and the seal seat ( 50 ) are pretensioned in a position spaced apart from one another.
13. Suction device ( 12 ) according to claim 1 , wherein
the flexible partition wall ( 28 ) extends inside the valve housing so that the control space ( 30 ) extends on one side of the flexible partition wall ( 28 ) and an intake-side space ( 32 ) extends on the other side of the flexible partition wall ( 28 ), and
said intake-side space ( 32 ) is connected to the control space ( 30 ) by the throttle passage ( 38 ).
14. Suction device ( 12 ) according to claim 1 , wherein
a suction body ( 14 ) is provided for application to an object to be suctioned,
the suction body ( 14 ) is arranged on the valve housing ( 18 ), and
the flexible partition wall ( 28 ) extends within the suction body ( 14 ).
15. Suction device ( 12 ) according to claim 1 , wherein the sealing protrusion ( 44 ) has a recess ( 46 ) which is open toward the control space ( 30 ), including said sealing protrusion being shaped like a funnel having a wide top and a narrow bottom.
16. Suction device ( 12 ) according to claim 1 , wherein
the flexible partition wall ( 28 ) is designed and arranged to snap bistably into a first configuration and a second configuration,
in the first configuration, the sealing protrusion ( 44 ) is placed against the seal seat ( 50 ), and
in the second configuration, the sealing protrusion ( 44 ) is spaced apart from the seal seat ( 50 ).