Adjustable rotary damper

Abstract

The present application relates to a rotary damper (10) comprising a substantially tubular housing (12) having at least one stop (19a, 19b) extending radially inward from an inner cylindrical surface (12a) of the housing (12), a rotor chamber (32) delimited by the inner cylindrical surface (12a) and an adjustment chamber separated by a partition wall (18) which is part of the housing (12) and extends radially inward, the partition wall (18) has at least one through-opening (18a) as part of a channel (28) for the viscous fluid. A rotor (16), which is formed as a cylinder to rotor blades (17a, 17b), is introduced into a rotor chamber (32) filled with a viscous fluid and is rotatably mounted therein about an axis of rotation (20) and is rotatable from a first stop surface (19a, 21a) of a stop (19, 21) to a second stop surface (19b, 21b) of the stop (19, 21). The rotor (16) divides the rotor chamber (32) into a first sub-chamber and a second sub-chamber, which are in fluid communication at least by a channel (28). A control element is introduced into the adjustment chamber and serves to adjust the cross-sectional area of the channel (28). The invention is characterized in that the control element comprises a slider (22) and a force transmission element (24). According to the invention, the slide (22) has at least one projection (22a) extending in the circumferential direction in some regions, said projection (22a) complementing at least one through-opening (18a) of the partition wall (18), which is designed as a slit extending at least partially in the circumferential direction, and the projection (22a) engages at least in some regions to the through-opening (18a). The slider (22) is configured to be axially movable along the axis of rotation (20) such that the cross-sectional area of the channel (28) is adjusted by the axial movement of the slider (22).

Description

[0001] The present application relates to an adjustable rotary damper of the type described in the preamble of claim 1.

[0002] Rotary dampers have already been proposed, for example, in EP0997 869B1 and DE102017215830A1. The damping provided by these rotary dampers depends on the direction of rotation and the angle of rotation. The damping is determined based on the construction of the individual components before the assembly process.

[0003] EP3736466A1 describes an adjustable rotary damper. Its adjustability is achieved by introducing an adjusting nut into the adjustment chamber. By axially adjusting or moving the adjusting nut, the cross-sectional area of the circumferential channel between the end face of the adjusting nut and the end face of the rotor or the shaft center can be adjusted, thereby adjusting the damping effect. The disadvantage of this solution is that it is impossible to prevent the unintentional adjustment or rotation of the adjusting nut, especially in areas with a large frictional damping, that is, when the cross-sectional area of the channel is the smallest, it is impossible to prevent the unintentional adjustment or rotation of the adjusting nut.

[0004] Other similar rotary dampers with circumferentially adjustable channels are disclosed in, for example, WO2018 / 165 840A1, CN205330352U, CN205359343U, and CN205729235U.

[0005] EP0742381B1 discloses a general adjustable rotary damper having a rotor rotatably mounted in a first part of a housing. The rotation range is limited by at least one limiter in the circumferential direction. Upstream and downstream of the at least one limiter in the circumferential direction, through openings are provided, each through opening being provided in a partition wall separating the first part and the second part of the housing. A rotatably mounted control element is mounted in the second part of the housing, the control element having a groove that extends circumferentially in some areas and has a variable depth and / or width within its extension. The through openings are located in the area of the circumferential groove in the radial direction and are thus in fluid communication with each other. By rotating the control element, the depth and / or width of the groove in the area of the two through openings can be adjusted, thereby adjusting the flow resistance during the movement of the rotor. The adjustment range depends on the way the groove is formed during the production process. At least one rotor blade has a valve element provided at the radially outer end of the rotor blade. The formation of this valve element further enables the rotary damper to provide a damping effect according to the direction of rotation. Fluid can flow through the valve element in one direction of rotation, that is, from one side of the rotor blade to the other side, while in the other direction of rotation, this flow will be blocked.

[0006] The disadvantage of this rotary damper solution is that the production of the groove requires a time-consuming and complex manufacturing process.

[0007] Accordingly, the object of the present application is to further improve a rotary damper of the type described in the preamble of claim 1 such that reliable adjustment of damping can be achieved in the installed state while avoiding the above-mentioned drawbacks.

[0008] According to a first aspect of the present application, this object is achieved by combining the features of the characterizing part of claim 1 with the features of its preamble.

[0009] The dependent claims relate to advantageous further embodiments of the present application.

[0010] In a known manner, a rotary damper includes a substantially tubular housing having at least one stopper. The stopper extends radially inwards from the inner cylindrical surface of the housing. The tubular housing has a rotor chamber and an adjustment chamber defined by the inner cylindrical surface, and the two chambers are separated by a radially inwards extending partition wall formed by a part of the housing. The partition wall has at least one through-opening which is part of a passage for a viscous fluid. A rotor having at least one rotor blade is introduced into the rotor chamber filled with the viscous fluid, and at least one rotor blade is formed as a cylindrical member. The rotor is mounted in the rotor chamber for rotation about a rotation axis. The rotor can rotate from a first limiting surface of the stopper to a second limiting surface. The rotor divides the rotor chamber into a first sub-chamber and a second sub-chamber, and the first sub-chamber and the second sub-chamber are in fluid communication with each other at least through the passage. A control element is introduced into the adjustment chamber for adjusting the cross-sectional area of the passage.

[0011] According to the present application, the control element includes a slider and a force transmission element. The slider has at least one projection which extends at least in some regions in the circumferential direction and forms a complementary part for at least one through-opening of the partition wall configured as a slit which extends at least in part in the circumferential direction, so that it is embedded in the through-opening at least in some regions. The slider is configured to be axially movable along the rotation axis, so that the cross-sectional area of the passage can be adjusted by axially moving the slider. The cross-sectional area of the passage can be adjusted by axially moving the slider. This not only enables cost-effective production but also enables continuous adjustment of the damping effect. In addition, at least one through-opening is thus configured as a guide for the slider or the projection. This saves space for the required guiding geometry in the adjustment chamber and ensures a compact design.

[0012] Due to the interaction of at least one through-opening and at least one complementary projection, the damping can be divided into two regions: a region where the damping is viscous and weak, and a region with stronger frictional damping. The viscous damping is obtained through the gap between at least one projection and the end face of the rotor. Frictional damping occurs when at least one projection contacts the end face of the rotor, that is, when the cross-sectional area of the channel is the smallest. In this case, constructing at least one through-opening as a guide for the complementary projection corresponding to the slider can prevent the rotation of the slider and the force transmission element / rotating element, thereby ensuring a constant cross-sectional area of the channel. This helps to ensure the constancy of the damping characteristics.

[0013] To protect the interior of the housing from external influences, a cover element, in particular a detachable cover element, is attached to the end face of the housing for sealing the housing.

[0014] Preferably, two cover elements are integrally joined to the housing respectively, especially by ultrasonic welding to the housing. This ensures a quick and firm closure of the housing and prevents the unintentional opening of the cover elements.

[0015] The force transmission element is preferably constructed to be rotatable and is held axially between the partition wall and the cover part. The force transmission element has an internal thread, and the external thread of a part of the slider meshes with it. The projections of the slider are held in the through-openings in the circumferential direction. This means that a simple rotational movement of the force transmission element can cause the axial displacement of the slider.

[0016] According to another advantageous embodiment of the present application, the force transmission element has a drive structure, in particular a hexagonal interface, at its end remote from the slider for locking a tool. The drive structure for locking the tool enables the user to simply adjust the axial position of the slider relative to the rotor without any assembly work.

[0017] Preferably, a chamber is provided between the force transmission element and the slider, and the chamber is in fluid communication with the rotor chamber through a drill hole provided in the slider. This allows the viscous fluid to flow into the chamber, thus more conveniently sealing the interior.

[0018] The viscous fluid is preferably in the form of silicone oil.

[0019] According to another advantageous embodiment of the present application, at least one rotor blade has a groove on its end face facing the partition wall, and the groove is associated with the through-opening and forms part of the channel. This allows an increase in the adjustment range of the cross-sectional area of the channel opening without the need for any additional installation space.

[0020] At its end remote from the partition wall, the rotor preferably has a coupling structure for connection to a drive device, in particular a coupling structure for a hinge. This type of rotary damper can be used in various applications, especially suitable for applications in the interior of an aircraft.

[0021] On the side facing the partition wall, the rotor preferably has a bearing pin arranged at the central position, which is inserted into the centrally arranged mounting seat in the partition wall and supported there. Mounting the rotor in this way can achieve a limited or minimized radial clearance in the area where the rotor faces the partition wall. In addition, this mounting method also brings more stable support.

[0022] According to another advantageous embodiment of the present application, the rotor has two rotor blades and the housing has two limiting protrusions. The first rotor blade is configured to rotate from the first limiting surface of the first limiting protrusion to the second limiting surface of the second limiting protrusion, and the second rotor blade is configured to rotate from the first limiting surface of the second limiting protrusion to the second limiting surface of the first limiting protrusion. Configuring the rotor to have two rotor blades increases the displacement surface of the rotor, thus generally also increasing the damping effect.

[0023] Preferably, at least one rotor blade has a control element, which has legs arranged at an angle to each other. The control element on the rotor blade is mounted to be movable in the circumferential direction. The control elements are radially distributed around the outside of the rotor blade, such that the first leg and the second leg are respectively arranged on one side of the rotor blade, and the third leg connecting the first leg and the second leg is arranged on the outer surface in the radial direction. The maximum distance between the first leg and the second leg in the circumferential direction and the length of the third leg are greater than the maximum distance between the first side and the second side of at least one rotor blade in the circumferential direction. Due to this configuration of the control element, when the rotor blade rotates around the rotation axis in one direction, the leg arranged in the rotation direction contacts the rotor blade. The leg in the control element away from the rotation direction is arranged to keep a certain distance from the rotor blade.

[0024] Preferably, a recess adapted to the third leg is provided on the outer surface of the rotor blade in the radial direction, and the third leg of the control element is introduced into this recess. This enables the outer surface of the third leg in the radial direction to be aligned with the outer surface of the rotor blade outside the recess, so that the assembly can be substantially sealed relative to the inside of the housing and cannot move in the axial direction.

[0025] According to another advantageous embodiment of the present application, the first leg and / or the second leg at least partially extend over the cross-sectional area of the groove of the rotor.

[0026] Preferably, the first leg is longer than the second leg. The first leg extends completely radially into the groove, while the second leg only partially extends radially into the groove. This enables adjustment of the damping according to the direction of rotation. Since the first leg extends completely radially into the groove, the second leg only partially extends radially into the groove, and the leg away from the direction of rotation is kept at a certain distance from the rotor blade, a greater damping effect can be achieved when rotating in the direction of the first leg.

[0027] The control element is preferably configured as a molded part produced by a primary molding process, preferably a bent part, and can in particular be made of stainless steel. This gives the control element corrosion resistance and durability.

[0028] The viscous fluid is preferably located in the rotor chamber and the adjustment chamber, so that the rotor chamber and the adjustment chamber are used as oil chambers. This reduces wear of the moving parts in the adjustment chamber and reduces oil loss in the rotor chamber.

[0029] Other advantages, features and possible applications of the present application can be obtained from the following description, in which reference is made to the embodiments shown in the accompanying drawings.

[0030] Throughout the specification, claims and drawings, the terms and related reference numerals described in the following list of reference numerals are used. In the drawings:

[0031] Figure 1 is a perspective view of the overall rotary damper as seen from above;

[0032] Figure 2a is a longitudinal sectional view of the rotary damper with the slider in its first end position;

[0033] Figure 2b is a longitudinal sectional view of the rotary damper with the slider in its second end position;

[0034] Figure 3a is a cross-sectional view of the rotary damper with the rotor including the control element in its first position;

[0035] Figure 3b is according to the rotor in its second position Figure 3a a cross-sectional view of the rotary damper shown;

[0036] Figure 4 is a perspective view of the second embodiment of the slider as seen from an angle;

[0037] Figure 5 is a longitudinal sectional view of the second embodiment of the rotary damper with the slider in its first end position;

[0038] Figure 6 is as seen from aboveFigure 3a Perspective view of the rotor shown in

[0039] Figures 1 to 3b and Figure 5 respectively show a rotary damper 10 having a tubular housing 12. Cover elements 14a, 14b are respectively provided on two end faces of the housing 12, and these cover elements 14a, 14b are welded to the housing 12 by ultrasonic welding.

[0040] Figure 1 is an overall perspective view of the rotary damper 10. On one side of the first cover element 14a, a coupling structure 16a of the rotor 16 is provided, and this coupling structure 16a is guided by the first cover element 14a and protrudes from the housing 12. In the radial direction, a seal 16b is provided between the rotor 16 and the cover element 14a, see Figure 2a . The housing 12 is substantially cylindrical in shape.

[0041] Figure 2a is a longitudinal sectional view of the rotary damper 10. Inside the housing 12, the rotor 16 is introduced into a rotor chamber 32, and the rotor 16 is configured as a partial cylinder having two rotor blades 17a, 17b. The outer surfaces of the rotor blades 17a, 17b of the rotor 16 in the radial direction are in contact with the inner surface 12a of the housing 12. Two radially inwardly facing limiting protrusions 19, 21 are formed in some regions of the inner surface 12a of the housing 12. Between the limiting surfaces 19a, 19b (see Figure 3a ) of the first limiting protrusion 19 to the limiting surfaces 21a, 21b (see Figure 3a ) of the second limiting protrusion 21, the rotor blades 17a, 17b are respectively mounted rotatably about the axis 20 in some regions. The coupling structure 16a is formed at one axial end. At the other axial end, the rotor 16 is in contact with a partition wall 18 of the housing 12, and the partition wall 18 is formed in the cross-sectional plane of the housing 12.

[0042] The partition wall 18 is integrally formed with the housing 12 and has a through opening 18a. In addition, the partition wall 18 is provided with a central groove 18b. The central pin 16c of the rotor 16 is embedded in and mounted in this central groove 18b.

[0043] An adjustment chamber 33 is formed on the side of the partition wall 18 away from the rotor 16, and a slider 22 is arranged in the adjustment chamber 33. The slider 22 has two through protrusions 22a. Each through protrusion 22a is mounted to be movable in the through opening 18a and is axially guided. The free end of the through protrusion 22a defines a channel 28 in the axial direction.

[0044] One end of the slider 22 remote from the partition wall 18 is movably mounted in the receiving portion 24a of the rotating element 24 and abuts laterally against the rotating element 24. An annular seal 22b is provided between the receiving portion 24a and the slider 22. The rotating element 24 abuts against an axial stop on the partition wall 18, and its other axial end abuts against the cover element 14b in some areas. This fixes the rotating element 24 in both axial directions. The rotating element 24 is configured to rotate about the rotation axis 20. The rotating element 24 has a drive structure 24b for a tool at its end remote from the slider 22, which is flush with the second cover element 14b in the axial direction.

[0045] The receiving portion 24a has a central hole 26, in which the pin-shaped end of the slider 22 facing the rotating element 24 is arranged. The inner wall of the central hole 26 is formed as an internal thread 26a in some areas, which engages with the external thread 22c of the pin-shaped end of the slider 22. By rotating the rotating element 24, the slider 22 can be moved axially along the rotation axis 20 within a limited range between two end positions. In Figure 2a the first end position is shown.

[0046] The first end position is characterized in that the end face of the slider 22 abuts against the end face of the rotor 16, thereby achieving frictional damping.

[0047] Figure 2b is Figure 2a a longitudinal sectional view of the rotary damper 10 shown in, in which view the slider 22 is in its second end position. The second end position is characterized in that the end of the slider 22 remote from the rotating element 24 substantially contacts the receiving portion 24a of the rotating element 24. This means that a channel 28 is formed between the end of the through protrusion 22a facing the rotor 16 and the end of the rotor 16 facing the partition wall 18, so that viscous damping can be generated.

[0048] Due to the formation of the channel 28 in the second end position, the fluid injected into the rotor chamber 32 can flow from one side of the rotor blades 17a, 17b to the other side of the rotor blades 17a, 17b. By moving the slider 22 in the axial direction, the cross-section of the channel 28 can be changed.

[0049] The slider 22 can move between a maximum damping position and a minimum damping position. In the maximum damping position, the cross-section of the channel 28 is the smallest, which is the first end position. In the minimum damping position, the cross-section of the channel 28 is the largest, which is the second end position.

[0050] Figure 3a is a cross-sectional view of the rotary damper 10, in which the rotor blades 17a, 17b of the rotor 16 according to the second embodiment have control elements 30 and are in their first position. In Figure 3a the rotor rotates in the rotation direction D.

[0051] In this view, the first rotor blade 17a is arranged in the first rotor chamber 32a of the rotor chamber 32, and the second rotor blade 17b is arranged in the second rotor chamber 32b of the rotor chamber 32. The partition wall 18 has through openings 18a in the two rotor chambers 32a, 32b respectively. The rotor blades 17a, 17b each have a recess 34 at their radial ends, and the recess 34 extends in the axial direction in some regions of the rotor blades 17a, 17b.

[0052] A control element 30 is introduced into each recess 34. The control element 30 has three legs 30a, 30b, 30c. The first leg 30a is located on one side of the rotor blades 17a, 17b, the second leg 30b is located on the other side of the rotor blades 17a, 17b, and the third leg 30c is arranged in the recess 34.

[0053] At the ends of the rotor blades 17a, 17b associated with the partition wall 18, grooves 36 are formed opposite to the through openings 18a. Figure 6 The groove 36 is shown in

[0054] The first leg 30a abuts against the side of the rotor blades 17a, 17b formed in the rotational direction D. The first leg 30a extends in the radial direction up to the length of the rotor blades 17a, 17b. The second leg 30b is located on the other side of the rotor blades 17a, 17b opposite to the rotational direction D and is spaced apart from the rotor blades 17a, 17b. The second leg 30b extends in the radial direction along the rotor blades 17a, 17b in some regions. The third leg 30c connects the first leg 30a and the second leg 30b in the circumferential direction.

[0055] In the axial direction, the first leg 30a extends over the entire cross-sectional area of the groove 36. The second leg 30b does not extend at all or only extends over the cross-sectional area of the groove 36.

[0056] Figure 3b is Figure 3a a longitudinal sectional view of the rotary damper 10 shown in Figure 3a in which the rotor 16 is in its second end position. In this case, the rotational direction D is opposite to the rotational direction D in

[0057] This configuration of the control element 30 allows for adjustment of the damping based on the direction of rotation. When the rotor 16 rotates in the direction of rotation D shown in Figure 3a , a stronger damping is generated than when the rotor 16 rotates in the direction of rotation D shown in Figure 3b .

[0058] Figure 4 is a view of an embodiment of the slider 22.

[0059] The slider 22 has two through protrusions 22a and a plurality of drilled holes 38.

[0060] Figure 5 is a longitudinal sectional view of a second embodiment of the rotary damper 10, in which the slider 22 is in its first end position in the view.

[0061] This embodiment is constructed according to the embodiment of Figure 2a , and the rotor blades are arranged to rotate 90° around the rotation axis 20. In addition, the slider 22 of this embodiment is constructed according to the embodiment of Figure 4 . In addition, this embodiment is provided with an opening 18c in the central recess 18b of the partition wall 18.

[0062] When filling the damper 10, the fluid can flow from the rotor chambers 32a, 32b into the drilled holes 26 through the holes 38 and the opening 18c in the partition wall 18. Thus, the rotor chambers 32 and the regulating chamber 33 are in fluid communication.

[0063] When the slider 22 moves axially, the rotor chamber and the regulating chamber function as pressure chambers.

[0064] Figure 6 is a perspective view of the rotor 16 shown in Figure 3a seen from a certain angle from above.

[0065] The rotor blades 17a, 17b each have a groove 36 that fluidly connects one side of the rotor blades 17a, 17b to the other side.

[0066] Since the slider 22 is configured to be axially movable in the through opening 18a, the damping can be easily adjusted according to various applications by the drive structure 24b. In addition, by providing the control element 30 and introducing the control element 30 into the groove 36, damping can also be provided according to the direction of rotation.

[0067] List of reference numerals

[0068] 10 Rotary damper

[0069] 12 Housing

[0070] 12a Inner side surface of the housing 12

[0071] 14a First cover element

[0072] 14b Second cover element

[0073] 16 Rotor

[0074] 16a Coupling structure of rotor 16

[0075] 16b Seal of rotor 16

[0076] 16c Central pin of rotor 16

[0077] 17a First rotor blade

[0078] 17b Second rotor blade

[0079] 18 Partition wall

[0080] 18a Through-opening in partition wall 18

[0081] 18b Central depression in partition wall 18

[0082] 18c Opening in partition wall 18

[0083] 19 First limiting projection

[0084] 19a First limiting surface of limiting projection 19

[0085] 19b Second limiting surface of limiting projection 19

[0086] 20 Rotating shaft

[0087] 21 Second limiting projection

[0088] 21a First limiting surface of limiting projection 21

[0089] 21b Second limiting surface of limiting projection 21

[0090] 22 Slide block

[0091] 22a Through-protrusion of slide block 22

[0092] 22b Seal of slide block 22

[0093] 22c External thread of slide block 22

[0094] 24 Rotating element

[0095] 24a Receiving part of rotating element 24

[0096] 24b Driving structure of rotating element 24

[0097] 24c Seal of rotating element 24

[0098] Drilling of the rotating element 24

[0099] Internal thread of the drilling 26a

[0100] Channel 28

[0101] Control element 30

[0102] First leg of the control element 30a

[0103] Second leg of the control element 30b

[0104] Third leg of the control element 30c

[0105] Rotor chamber 32

[0106] First rotor chamber 32a

[0107] Second rotor chamber 32b

[0108] Regulating chamber 33

[0109] Recess 34

[0110] Groove 36

[0111] Drilling 38

Claims

1. A rotary damper (10) comprising a substantially tubular housing (12), said housing (12) having at least one stop member (19a, 19b) extending radially inwardly from the inner cylindrical surface (12a) of said housing (12), a rotor chamber (32) defined by said inner cylindrical surface (12a) and an adjustment chamber, said rotor chamber and said adjustment chamber being separated by a partition wall (18) which is part of said housing (12), said partition wall extending radially inwardly, wherein, The partition wall (18) has at least one through-opening (18a) which is part of a channel (28) for a viscous fluid. A rotor (16) having at least one rotor blade (17a, 17b) is introduced into the rotor chamber (32) filled with the viscous fluid and is rotatably mounted therein about a rotation axis (20). The at least one rotor blade (17a, 17b) is formed as a cylindrical member and is configured to rotate from a first limiting surface (19a, 21a) of the limiting members (19, 21) to a second limiting surface (19b, 21b) of the limiting members (19, 21). Wherein, the rotor (16) divides the rotor chamber (32) into a first sub-chamber and a second sub-chamber, and the first sub-chamber and the second sub-chamber are in fluid communication with each other at least through the channel (28). A control element is introduced into the adjustment chamber, and the control element is used to adjust the cross-sectional area of the channel (28). It is characterized in that the control element includes a slider (22) and a force transmission element (24). The slider (22) has at least one protrusion (22a) extending in the circumferential direction in some regions. The protrusion (22a) forms a complement to the through-opening (18a) of at least one partition wall (18). The through-opening (18a) is configured as a slit extending at least partially in the circumferential direction, and the protrusion (22a) is embedded in the through-opening (18a) at least in some regions. The slider (22) is configured to be axially movable along the rotation axis (20), so that the cross-sectional area of the channel (28) is adjusted by the axial movement of the slider (22).

2. The rotational damper according to claim 1, wherein Cover elements (14a, 14b), in particular detachable cover elements, are attached to each end face of the housing (12), and the cover elements (14a, 14b) seal the housing (12).

3. The rotational damper according to claim 2, wherein, The two cover elements (14a, 14b) are respectively joined to the housing (12) by material bonding, in particular by ultrasonic welding to the housing (12).

4. The rotational damper according to any one of claims 2 or 3, characterized in that The force transmission element (24) is configured to be rotatable and is axially fixed between the partition wall (18) and the cover part (14b) in the axial direction. The force transmission element (24) has an internal thread (26a), wherein an external thread (22c) of a part of the slider (22) engages with the internal thread (26a), and the protrusion (22a) of the slider (22) is fixed in the circumferential direction through an opening in the through-opening (18a).

5. The rotational damper according to any one of the preceding claims, characterized in that The force transmission element (24) has a drive structure (24b), in particular a hexagonal interface, at its end remote from the slider (22) for a tool in a mechanically locking manner.

6. The rotary damper according to any one of the preceding claims, characterized in that, A chamber is provided between the force transmission element (24) and the slider (22), and the chamber is in fluid communication with the rotor chamber (32) through a drill hole (38) in the slider (22) and an opening (18c) in the partition wall (18).

7. The rotary damper according to any one of the preceding claims, characterized in that, The viscous fluid is in the form of oil.

8. The rotational damper according to any one of the preceding claims, characterized in that, At least one rotor blade (17a, 17b) has a groove (36) on the side facing the partition wall (18), the groove (36) being associated with the through-opening (18a) and being part of the channel (28).

9. A rotary damper according to any one of the preceding claims, characterized in that, The rotor (16) has a coupling structure (16a) at the end remote from the partition wall (18) for connection to a drive device, in particular for a hinge.

10. The rotational damper according to any one of the preceding claims, characterized in that, The rotor (16) has a centrally arranged bearing pin (16c) at the end facing the partition wall (18), the bearing pin (16c) engaging in and being mounted in a centrally arranged receiving portion (18b) of the partition wall (18).

11. The rotary damper according to any one of the preceding claims, characterized in that, The rotor (16) has two rotor blades (17a, 17b), and the housing (12) has two stop projections (19, 21), wherein the first rotor blade (17a) is configured to rotate from a first stop surface (19a) of the first stop projection (19) to a second stop surface (21b) of the second stop projection (21), and the second rotor blade (17b) is configured to rotate from a first stop surface (21a) of the second stop projection (21) to a second stop surface (19b) of the first stop projection (19).

12. The rotational damper according to any one of the preceding claims, characterized in that, The at least one rotor blade (17a, 17b) respectively has a control element (30), the control element (30) having legs (30a, 30b, 30c) arranged at an angle to each other, the control element (30) being mounted on the rotor blade (17a, 17b) so as to be movable in the circumferential direction, for which purpose the control element (30) radially surrounds the rotor blade (17a, 17b) such that the first leg and the second leg (30a, 30b) are respectively arranged on both sides of the rotor blade (17a, 17b), and the third leg (30c) connecting the first leg and the second leg (30a, 30b) is arranged on the radially outer surface, wherein the maximum distance in the circumferential direction between the first leg and the second leg (30a, 30b) and thus the length of the third leg (30c) is greater than the maximum distance between the first side and the second side of the at least one rotor blade (17a, 17b) in the circumferential direction.

13. The rotational damper according to claim 12, characterized in that, A recess (34) matching the third leg (30c) is provided on the radially outer surface of the rotor blade (17a, 17b), and the third leg (30c) of the control element (30) is introduced into the recess (34).

14. The rotational damper according to any one of claims 12 or 13, characterized in that, The first leg and / or the second leg (30a, 30b) at least partially extends over the cross-sectional area of the groove (36) of the rotor (16).

15. The rotary damper according to any one of claims 12 to 14, characterized in that The first leg (30a) is longer than the second leg (30b), wherein the first leg (30a) extends completely radially into the groove (36), and the second leg (30b) only partially extends radially into the groove (36).

16. The rotational damper according to any one of claims 12 to 15, characterized in that, The control element (30) is configured as a molded part made by a primary forming process, preferably a bent part, in particular a part made of stainless steel.

17. The rotational damper according to any one of the preceding claims, characterized in that, A viscous fluid is contained in the rotor chamber (32) and the regulating chamber (33), and the rotor chamber (32) and the regulating chamber (33) thus serve as oil chambers.

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