EP3625476A1

EP3625476A1 - Device having a controllable rotary damper, and method

Info

Publication number: EP3625476A1
Application number: EP18729584.5A
Authority: EP
Inventors: Stefan Battlogg
Original assignee: Inventus Engineering GmbH
Current assignee: Inventus Engineering GmbH
Priority date: 2017-05-20
Filing date: 2018-05-18
Publication date: 2020-03-25
Also published as: DE102017111032A1; US20200087965A1; WO2018215342A1; CN110770466B; US11634935B2; US20210238901A1; US11136807B2; CN110770466A

Abstract

Door component (100) and method having a controllable rotary damper (1) and two connector units (151, 152) which can be moved relative to one another, wherein one of the two connector units (151, 152) can be connected to a load-bearing construction and the other of the two connector units (151, 152) can be connected to a movable door device (154) of a vehicle (100), in order to damp a movement of the door device (154) between a closed position (102) and an open position (103) in a controlled manner at least partially. Two spindle units (4, 5) which are in engagement with one another are arranged between the two connector units (151), one spindle unit being configured as a threaded spindle (4) and the other spindle unit being configured as a spindle nut (5). A first spindle unit (4) is fastened rotatably on a coupling rod (3) which is connected to one of the connector units (151, 152). A magnetorheological transmission device (40) is arranged between the coupling rod (3) and the first spindle unit (4), in order to brake a rotational movement of the first spindle unit (4) as required.

Description

Device with a controllable rotary damper and method

The present invention relates to a device with a controllable rotary damper, which comprises at least one magnetorheological transmission device and a method.

A rotary damper with a magnetorheological fluid can be used advantageously. Magnetorheological fluids have dispersed in an oil on the finest ferromagnetic particles such as carbonyl iron powder. In

Magnetorheological fluids become spherical particles with a production-related diameter of 1 to 10

Micrometer used, wherein the particle size is not uniform. If such a magnetorheological fluid is acted upon by a magnetic field, then the chains are linked

Carbonyl iron particles of the magnetorheological fluid along the magnetic field lines, so that the rheological properties of the magnetorheological fluid (MRF) are significantly influenced depending on the shape and strength of the magnetic field.

Previously known devices with a controllable rotary damper are often elaborately designed to meet the requirements. Therefore, such devices are not favorable to manufacture. One difficulty is that

For example, door damper for motor vehicles and

Passenger cars with million-fold manufactured and therefore optimized and cost-effective mechanical door stops compete with a car door in two or three

determine different angular positions.

It is therefore the object of the present invention to provide an improved and / or less expensive device with a controllable rotary damper on a magnetorheological basis. This object is achieved by a device having the features of claim 1 and claim 2 and by a

Process with the features of claim 26. Preferred

Further developments of the invention are the subject of the dependent claims. Further advantages and features of the present invention will become apparent from the general description and the description of the embodiments.

A first device according to the invention is as

Damper device formed and includes two relatively

mutually movable connection units and a controllable rotary damper in order to damp a relative movement of the terminal units controlled each other. Between the two

Connection units are arranged two mutually engaging spindle units, wherein a spindle unit is designed as a threaded spindle and the other spindle unit as a spindle nut. A first spindle unit (and in particular the threaded spindle) is rotatable on one with one of

Connection units (indirectly or directly) connected

Coupling rod attached. Between the coupling rod and the first spindle unit (in particular the threaded spindle), a magnetorheological transmission device is arranged to permit a rotational movement of the first spindle unit (as required)

influence (and in particular decelerate).

Such a device can be advantageously and widely used in different technical fields

(Prosthetics, doors of buildings, doors of boxes (e.g., kitchen) or furniture ...).

Another device according to the invention is designed as a door component and has at least one controllable rotary damper and two relatively movable connection units, wherein one of the two connection units with a

Support structure and the other of the two terminal units with a movable door device, in particular a (force) Vehicle, connectable to at least partially control a movement of the door device between a closed position and an open position. Between the two

Connection units are arranged two intermeshing spindle units, wherein a spindle unit as

Threaded spindle and the other spindle unit is designed as a spindle nut. A first spindle unit (and in particular the threaded spindle) is rotatable on one with one of

Attached connection units connected coupling rod. Between the coupling rod and the first spindle unit is a

Magnetorheological transmission device arranged to a rotational movement of the first spindle unit (in particular the

Threaded spindle) (as required) to influence (and in particular to decelerate).

This device according to the invention is very advantageous and can be used, for example, for damping a movement of a car door or a rear or a front flap, etc., so that pivoting movements of doors about vertical and / or horizontal axes are possible.

In preferred developments of all previously described

Devices convert the spindle units a linear movement of the terminal units relative to each other in a rotational movement of the spindle units to each other.

Preferably, in a relative movement of the

Connection units to each other a relative axial position of the spindle units to each other (of spindle nut and

Threaded spindle).

In particular, the first spindle unit is designed as a threaded spindle and / or preferably, the second spindle unit is designed as a threaded nut.

It is preferred that the spindle nut the threaded spindle radially surrounds.

In particular, the threaded spindle is designed to be at least 30% and preferably 40% or 50% longer than the

Spindle nut.

It is preferred that the magnetorheological transfer device is disposed radially inwardly of the first spindle unit (and in particular the threaded spindle).

In all embodiments, it is preferred that the

Threaded spindle relative to the spindle nut and against the coupling rod is rotatable.

It is advantageous if a ring-cylindrical cavity is formed radially between the coupling rod and the first spindle unit.

Preferably, in the first spindle unit, a cylindrical sleeve made of a magnetically conductive material is accommodated and non-rotatably connected to the first spindle unit.

Preferably, the cavity is filled with a magnetorheological medium.

It is advantageous if the first spindle unit

(Screw) at least partially (or almost completely or completely) consists of a plastic. That saves

Weight. In addition, self-lubrication can be achieved.

In particular, the magnetorheological includes

Transmission device at least one electrical coil and in particular a plurality of electrical coils.

The electrical coil preferably has windings wound around the coupling rod. Preferably, the magnetorheological includes

Transmission device at least one magnetic circuit having an axial section in the coupling rod, an axial section in the cylindrical sleeve and / or the first spindle unit

(In particular threaded spindle), the electric coil and arranged on at least one axial side of the electric coil at least one in the radial gap between the coupling rod and the first spindle unit (preferably threaded spindle)

Rotary body.

It is preferred that in each case at least one rotary body is arranged on both axial sides of the electric coil.

In particular, on at least one axial side of the

electric coil arranged a plurality of rotary bodies distributed on the circumference of the coupling rod.

The (or at least one) magnetic circuit comprises in particular on both axial sides of the electric coil in the radial gap between the coupling rod and the threaded spindle arranged rotary body.

Preferably, a plurality of magnetic circuits is formed.

It is preferred that at least one electrical cable such as a connecting cable for the electric coil is supplied through a channel in the coupling rod. The implementation of cables for sensors is possible. A cable can also be led out at both ends or sides. When used on a car door such. B. once to the door spar or in the inner part of the door.

Preferably, the coupling rod is pivotable about a pivot axis aligned transversely to the coupling rod.

In particular, the first spindle unit (threaded spindle) is axially fixed to the coupling rod. The first spindle unit extends in particular over the axial adjustment range.

It is preferable that a motor for driving the first

Spindle unit is included.

The inventive method is used to influence a movement of a door device with a door component with at least one controllable damper device and two relatively movable connection units, wherein between two connection units two mutually engaged

Spindle units are arranged. There is a movement of the door device at least partially between a

Closed position and an open position controlled. In this case, the damper device and / or a motor for driving one of the spindle units is controlled in order to achieve a guided door movement.

In particular, the method is used to influence a

Door movement of a door device with a previously described door component with a damper device.

In a preferred embodiment of the method, the method is used to influence a door movement of a door device with a previously described door component with a

Damper device. In this case, the door component in particular comprises one or preferably a first and a second spindle unit and preferably at least one motor for driving the first spindle unit. The executed in particular as an electric motor motor and the damper device are connected so that a haptic advantageous guided door movement is possible.

In further developments of the method or the method are

Features available as previously described.

Here are comments on the structure, the function and the Procedure:

Magnetic circuit: a magnetic circuit is formed around each coil. The magnetic circuit is in particular over both (adjacent)

Rolling element, the coupling rod and a sleeve (pipe) closed. All parts of the magnetic circuit are particularly preferred

Ferromagnetic, in the other parts, the magnetic properties are usually not so important. Non-ferromagnetic need only be those parts which are otherwise "magnetic"

Short circuit, i.e., cause a bypass path for the magnetic field past the rolling elements (such as, in particular, the ball bearing, the retainer of the seal ring and a stopper ring).

The sleeve is on the inside of the threaded spindle. The sleeve is not necessary if the threaded spindle itself is ferromagnetic. Due to the sleeve, however, the threaded spindle requires no

ferromagnetic properties and can be totally good

Sliding behavior / favorable production / service life can be optimized.

In the structure shown in the embodiment, a plurality of preferably coil / Wälzkörperpakete be used. The structure works analogously with only one coil or one

Rolling elements (per coil). By having multiple electric coils

can be used, the flux density can be reduced at critical points (coupling rod, sleeve) and thinner the entire structure. However, it would also be conceivable to produce the same moment with only one (long) coil and one (long) rolling element.

It is important that the coils are firmly attached to the coupling rod and thus relative to this (or the body of a door component) are. That facilitates the electrical

Connection. Also, the spindle nut is, only the spindle (and the ferromagnetic sleeve in it) rotate - and maybe some other small parts like hole nut.

There may be holes in the coupling rod, which run transversely or in a zig-zag pattern. These are ways to connect the individual coils without damaging the running surface of the rolling elements. It is also possible to introduce an axial channel on the surface of the coupling rod. In this case, a ring can be pushed over such an axial channel (as a running surface or sealing point). It is also possible to provide an axial central bore with radial bores to the individual coils.

Whether the coils are routed serially, in parallel or each connection individually, depends on the application and the

desired properties. All variants are possible. It may be advantageous for the coils to be different

have electromagnetic properties. In particular, coils with the same shape / same dimensions can be wound differently (different wire size + number of turns, different material).

The coils may (but need not) have coil carriers. A coil carrier or coil holder is not absolutely necessary, it can also be used air coils or the coils can be directly on the coupling rod (can also be referred to as a wave) to be wound. In this case, lateral boundaries (discs, stop rings) instead of a coil carrier can be used.

The coils may be potted (tight) or open and then in contact with the magnetorheological fluid (MRF). The coils can be threaded as finished components on the preferably round trained coupling rod or be wound directly on the coupling rod.

It is advantageous if the coil carrier (also bobbin holder called) a connector (plug) is located or a part of the carrier forms such.

In addition to the coils or rather than a part of the coils, hard-magnetic material can also be part of the magnetic circuit and thus generate a defined basic torque without current. Such a hard magnetic material is preferably in the range of

Coupling rod or sleeve provided. The hard magnetic material may be a permanent magnet whose permanent

Magnetic field can be superimposed by a dynamic field of a coil. Alternatively, remanence can be used where permanent magnetization of the material is adjusted by (short) electrical pulses.

Preferably, a is between adjacent magnetic circuits

Intermediate ring provided. Alternatively, two rolling elements without intermediate ring in between or a single longer

Rolling elements are used. The longer rolling element is part of one magnetic circuit at one end and part of the other magnetic circuit at the other end.

Grooves may be provided under the rolling elements. These are not essential. However, they increase the flux density locally and thus allow radially inward a higher moment

transfer .

In the grooves and (rubber) rings can be inserted to define the position of the rolling elements in the gap and to force a rotation of the rolling elements, since they slip on the

Prevent inner diameter. There may also be several grooves per rolling element.

The preferred (and in the embodiment shown construction) has the advantage that at one end only one

Plain bearing / screw is. The electrical connection is made by the shaft in the direction of the pivot axis. Alternatively, the electrical connection can be made in the screw. The threaded part can be firmly connected to the coupling rod (so that the plug is relative to the door component). The electrical connection can then take place analogously to other components of the door (windows, speakers,

Lighting, rearview mirror adjustment).

In particular, the screw is also suitable to accommodate next to the plug and a (simple) electronics. It can also be a sensor part of the electronics: this is to determine the opening angle of a door. It can the

Relative movement (rotation) of the spindle unit relative to the

Coupling rod to be measured.

In a concrete embodiment is a cylindrical

Coupling rod or a coupling tube around the longitudinal axis non-rotatably connected to the body (A or B-pillar). But the rod end can pivot in the connecting part to the door (hinged).

At least one magnetorheological transmission device (an MRF wedge bearing element) is mounted between this cylinder part and the spindle inside, wherein rolling or spherical bodies, electric coils, starting disks and cables are used. On the outside of the spindle is a multi-start thread. This is operatively connected to a non-rotating spindle nut through the threads. The spindle nut is mounted by means of a bracket in the vehicle door, preferably pivotable.

Depending on the current supply of the magnetorheological

Transfer device ("MRF wedge bearing") changes the force that must be applied so that a longitudinal movement takes place / is possible.

In this case, a ball screw, ball screw or coated spindle can be used. A frictional connection is possible.

The invention enables a simple design (low cost), wherein the aim is to design a device or a door component with a rotary damper (door pivoting brake), which can be produced as inexpensively as possible. With such a device, many functions are possible, such as. For example, in the case of a door component, standing in front of an obstacle, the anti-trap protection (finger, hand ...). However, certain sensors are required for this (near-field detection). For most vehicles these are

Sensors are not available or in an insufficient for the proper door opening function quality or design. Thus, the many possible functions of the adaptive damper can be used only conditionally.

It is advantageous to use existing information so that an increased range of functions of the door component can be achieved. Meant here are information to use, such as:

Position of the vehicle in space (longitudinal or

Cross inclination; e.g. Signal from the airbag or ABS

Control unit), approaching pedestrians or cyclists (from the parking sensor),

Door in the lock or not (lock sensor or contact between door and body)

Seat information (driver sits in the seat and gets out, seat contact from the airbag or seat heating)

Key info (customer is outside the car and wants to get in)

These data can be evaluated and assigned corresponding current values at the rotary damper. It can be here on an "expensive Electronics "be dispensed with in the traditional sense.

It is possible to use a constant current plus the "MRF wedge bearing." With "constant current" (the current or amperage is not changed while the door is moving), the "special" behavior of the MRF wedge brake is used means that when braking the braking force decreases, at standstill this is very high, so the driver can easily reach the door to the desired level

End position are performed. As soon as the door is left standing, the braking force increases automatically (wedge effect or

Wedge curve), the door is fixed.

Alternatively, or in combination, a rotary encoder in the door hinge, a longitudinal encoder between door handle and door, a

Near field sensor (optical sensor, which controls the door movement

monitored) are used for position detection.

A local sensor that determines the opening angle of the door offers many advantages. There are many ways to measure them directly or derive them from linear or rotary motion (potentiometric, capacitive, inductive, magnetic, etc.).

Example 1) Sensor on the pivot axis of the shaft

In a preferred solution, it is measured with a potentiometer. This is a cheap solution, but robust potentiometers are needed. Alternatively, however, at the same location, e.g. a Hall sender measure the distance of a magnet (non-contact) or the flanks of a gear.

Example 2) Sensor linear: The movement of the threaded spindle relative to the spindle nut. In this case, the existing tooth structure can be scanned, preferably with encoder, which can also interpolate. This allows a comparatively high resolution, but also an expensive sensor is used.

Example 3) Sensor measures rotational movement in the screw-in part (or Hole nut).

Advantage: higher resolution due to the pitch of the spindle unit (with the same physical dimensional standard). From a

A fraction of a revolution on the pivot axis (Example 1, <90 °), for example, 3 complete revolutions over the entire stroke. In addition, the (at least partially

Protected) area within the screw part mitigate a part of the environmental conditions, which does not follow so great demands on the sensor structure.

Ideally as an encoder, possibly as a low cost solution without interpolation. Example optical encoder as fork light barrier, which scans a tooth structure connected to the spindle. For the attribute "low-cost", it makes sense to use as many synergies as possible: a sensor on the pivot axis probably requires a housing, a plug and a cable, in the worst case also a printed circuit board with a few additional components

(Protective functions, signal conditioning).

In the area of the screw-in part, the sensor could be part of a small electronic module (control, connection coils, plug to the vehicle).

About the electronics: "Constant current" offers many advantages. It is possible that an existing control unit takes over the control of the doors, but the implementation can be more complex than to implement a separate small control.

It is possible to use an existing control unit, which controls the actuator or several actuators directly. Not only

Logic level are switched, but also some power is needed, a corresponding control unit is needed.

Preferably, a minimal amount of "intelligence" is used, completely without a control device, ie, similar to, for example, window regulators, the actuators have no significant advantage over them

existing systems. In an existing / central control unit synergies can be used, eg a polarity reversal protection for the supply or even a multi-channel switch (= IC with multiple switches) for all actuators.

This is cheap and offers many technical advantages.

A separate control unit is advantageous and allows its own control for each actuator and ideally directly on or in the actuator. For example, in the area of the screw-in, so that no housing is needed (and no connector to the coils, as they can be soldered directly). One advantage is that the control of the actuator is possible directly with PWM, since a short connection to the coils is possible and the structure is shielded by the housing. A separate control unit is

furthermore advantageous if a sensor is also integrated.

This can use common resources (supply,

Printed circuit board, protective circuit, plug).

Possible is a modular concept, everything necessary for the operation is on / in the actuator, only one plug to the vehicle (supply).

The control unit can provide real-time control of the door damper with simple means, with a sensor autonomous operation is possible.

Global information can be exchanged via a bus (space vehicle, obstacle ...). This allows a better tuning of the function as well as additional possibilities.

Information of the door damper can also be returned to the vehicle (sensor, diagnosis ...). LIN is suitable for such applications, but it is also analog

Control voltages, simple digital commands or more complex communication via bus systems conceivable.

Another variant is a combination, with a central Control unit is used, but the power electronics is on the actuator. It is then preferably powered without power (analog or digital).

If only a few predefined current levels are to be adjustable at constant current, it is an interesting approach to be able to apply the coils individually. It works like the fan heater: one coil = half power, both

Heating full power. In return, several switches are needed.

It is also possible to build a current regulator, the

can output different currents. In the simplest case, different switches with different ranges

Series resistors. This approach has limits in terms of energy efficiency and flexibility. Such a solution is strongly dependent on external parameters (supply voltage,

Temperature...). Some of these can be compensated (for example, voltage stabilization), but the effort would be greater than equal to a continuously variable supply

to implement .

It is possible to use a stepless current output. In the simplest case via a linear regulator, but this energy is "burned" unneeded energy, which could be the case in this application

be acceptable, since comparatively little power can be expected (500mA). The control must be able to drive the maximum current even in the worst case.

Alternatively, a clocked / switched current control can be implemented. However, additional components (switches, inductors, capacitors) are required.

In contrast to several current stages, which can be adjusted by several switches, a switch is enough for stepless control! In summary results

1. Switch binary: On or Off, 2 states per switch

With n-switches 2 n states: 2 switches for 4 stages, 3 switches for 9 stages - but only if the stages can be skilfully interconnected.

2. Switch stepless: linear operation, linear control

The switch can assume any intermediate states, the resistance of the switching element is controlled so that the desired voltage / current / power is applied to the actuator. Unnecessary energy is "burned" in the switch.

3. Switch binary, fast clocked: PWM

Fast switching on and off controls the average power applied to the actuator. Frequency outside of

perceptible area, additional components smooth the output signal (EMC).

It should be noted that instead of a current control very likely also a voltage regulation or

Voltage control is sufficient. The resistance of the coil does not change very much (only slightly due to the temperature). More critical are probably manufacturing tolerances. But they can

can be specified or can be done after production adjustment.

The previous approaches are based on a switch that closes the circuit when switched on and thus allows the flow of current through the actuator. If the switch is opened while current is flowing in the coil, this allows one

Free-wheeling diode continues to circulate. About the existing ones

Resistors, the current is slowly dissipated.

For a fast load shedding (current back to zero), a full bridge is advantageous. About this, the current direction be turned around, whereby the current falls very quickly. For a low-cost solution, this approach will be too costly, especially since no further advantages can be gained by reversing the current direction.

Alternatively, the resistance in the freewheeling path can also be increased by other elements (resistor, zener diode ...). As a result, the losses increase when switching off, the power drops faster

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures. The figures show a highly schematic plan view of a

Motor vehicle with a device with a rotary damper;

Figure 2 shows a device with a rotary damper in one

perspective view;

Figure 3 is a plan view of the device of Figure 2;

Figure 4 is a section through the device of Figure 2;

Figure 5 is an enlarged detail of Figure 4;

Figure 6 is a perspective view of another device;

FIG. 7 is a sectional schematic diagram; and

FIG. 8 shows the force curve of a device according to FIG. 2 or 6.

FIG. 1 shows the application of the invention

Device 50 as a door component 100 on a motor vehicle 200 and here a passenger car. The motor vehicle 200 is in a schematic top view is shown from above. On the motor vehicle 200 here are two designed as doors

Door devices 154 are provided. The doors are both in the open position 103. Hatched in, a door is in the closed position 102.

For damping the pivotal movement of the doors 154

Door components 100 are provided, each comprising a rotary damper 1. The door components each comprise connection units 151 and 152, one of which is attached to a support structure of the

Motor vehicle 200 is connected, while the other is connected to the door 154, so that at an opening or

Closing movement of the door 154 is a relative movement of the

Connection units 151 and 152 takes place. The terminal units 151 and 152 move linearly. There is a conversion into a rotational movement, which is damped by the rotary damper 1 of the device 50.

The device 50 may be formed as a door component 100 and include the rotary damper 1 and connector units 151 and 152 and used to dampen the rotational movement of doors and flaps on a motor vehicle 200. The device 50 may also be formed directly as a damper device 50 and the

Rotary damper 1 and terminal units 151 and 152 include and for damping rotational movements or z. B. linear movements between the terminal units 151 and 152 are used.

FIG. 2 shows a perspective view of the device 50, wherein the device 50 comprises a rotary damper 1.

The device 50 may be formed as a damper device or as a door component 100 and thus for use on the motor vehicle 200 of Figure 1 or to others

Applications serve.

The device 50 comprises a first connection unit 151 and a second terminal unit 152, which may be disposed at the opposite ends. However, it is also possible, as FIG. 2 shows, that the connection unit 152 is not arranged or attached to the physical end of the device 50.

The device 50 comprises a coupling rod 3, which in the

Rotary damper 1 protrudes. At the outer end of the coupling rod 3, a pivot axis 24 is provided, about which the coupling rod 3 is pivotally received. On the pivot axis 24, the first connection unit 151 is articulated. At the

Connection unit 151 is here a mounting hole 26 is formed, which in use as a door component 100th

for example, for attachment to a door spar is used. On the pivot axis 24 and an angle sensor 23 (for example, designed as a rotary encoder) may be arranged.

The coupling rod can have any spatial contour, so it does not have to be straight. This facilitates installation in confined spaces.

The second connection unit 152 is here arranged in the central region of the device 50 and comprises a mounting bracket, which is arranged pivotably about the pivot axis or the joint 25. The bracket 20 surrounds the spindle unit 4, which is designed here as a threaded spindle.

FIG. 3 shows a plan view of the device 50, in which the second spindle unit 5 can be seen, which is embodied here as a spindle nut and which is in engagement with the first spindle unit 4. The spindle unit 4 is fixedly arranged on the coupling rod 3 in the axial direction. The threaded spindle 4 is

However, rotatably disposed about the coupling rod 3, so that at a relative axial displacement of the two terminal units 151 and 152 relative to each other, the distance of

Terminal units 151 and 152 and thus the rotatably received on the terminal unit 152 spindle nut 5 a Rotary movement of the threaded spindle 4 causes the coupling rod 3 around. As a result, the spindle nut 5 on the

Threaded spindle 4 axially displaceable, whereby, for example, an opening or closing of the door of a motor vehicle is made possible. The spindle units 4 and 5 convert a linear movement into a rotary movement.

Figure 4 shows a section through the device 50, wherein at the left end of the coupling rod 3, the connection unit 151 is connected.

The threaded spindle 4 is rotatably supported about the coupling rod 3 at the left end via a bearing 7 designed as a roller bearing and at the right end via a bearing 37 designed as a sliding bearing. The bearings 7 and 37 are arranged in the semi-cylindrical interior space between the hollow threaded spindle 4 and the coupling rod 3.

At one end, a threaded nut 12 is screwed onto the coupling rod to fix the inner ring of the rolling bearing 7 in the axial direction. Similarly, a hole nut 16 is in the same end in the hollow threaded spindle. 4

screwed to fix the outer ring of the rolling bearing 7 axially.

At the other end here a screw 19 is screwed into the hollow end of the threaded spindle 4 and there completes the opening of the threaded spindle 4 completely. At the screw 19 here the slide bearing 37 is formed or used.

Inside the hollow spindle nut 5 here a sleeve 17 is inserted, which is non-rotatably connected to the threaded spindle 4 and, for example glued or fixed in a form-fitting manner. The use of a sleeve 17 made of a ferromagnetic material makes it possible, the threaded spindle 4 itself, for example, from a

Produce plastic. That leads to a considerable Weight savings. In addition, a self-lubrication of the intermeshing threaded portions of the spindle units 4 and 5 can be achieved, so that the device 50 can be operated maintenance-free.

Adjacent to the rolling bearing 7, a seal 13 is arranged, which comprises, for example, a shaft seal and in

touchingly seals all the gaps. Since the coupling rod 3 is preferably made of a ferromagnetic material and

For example, a relatively soft steel is

preferably a raceway 28 made of a hardened or

coated (e.g., hard chromium) material is applied to the coupling rod 3 in the region of the gasket 13 to prevent wear.

Inside is in the cavity between the coupling rod 3 and the sleeve 17 (if the threaded spindle of, for example

Plastic) or the inner wall of the threaded spindle 4 (if this consists of a ferromagnetic material and no sleeve 17 is present) and the outer surface of the

Coupling rod 3 preferably housed a plurality of magnetic circuits. For this purpose, electric coils 9 are either wound directly on the coupling rod 3 or wound on bobbin holder 11 in the hollow cylindrical interior, which are then pushed onto the coupling rod 3.

Adjacent to the electric coils 9, a plurality of rotary bodies or rolling elements 2 are preferably accommodated on each axial side, through which the magnetic field of the magnetic circuit closes. For example, at an axial position z. B. 8 or 10 rotary body 2 distributed on the circumference.

FIG. 5 shows an enlarged detail from FIG. 4, in which case the course of the magnetic field 10 or a field line of a

Magnetic circuit is shown by way of example. The magnetic field generated by the electric coil 9 as a magnetic field source 8 passes through a portion of the sleeve 17 and passes through a disposed adjacent to the electric coil 9 rotary body 2 and enters the existing of a ferromagnetic material coupling rod and extends axially back to the next rotary body 2, where the magnetic field line again passes radially through a rotary body 2 and into the sleeve 17 and is closed there.

Preferably, two separate rotary body rows are provided between two axially adjacent coils. There may be provided a plurality of magnetic circuits which are axially spaced from each other. Each magnetic circuit can, for. B. comprise two rows of rotary bodies, which are arranged distributed on the right and left of an electric coil on the circumference.

But it is also possible that in the axial direction elongated rotary body are provided so that one end of a long

elongated cylindrical rotating body is traversed by the magnetic field of the adjacent on one axial side electrical coil 9, while the other end of the cylindrical rotating body 2 is traversed by the magnetic field of the next electric coil 9.

Central in the interior of the coupling rod 3, a channel 21st

be formed, which includes branching channels, the z. B. to the individual electric coils 9 extend to supply the individual electric coils 9 specifically with power.

It is possible that between each series of

Rotary bodies 2 are each provided between rings 18 to separate the individual magnetic circuits from each other.

Clearly visible in Figure 5 and the external thread 14 of

Screw 4, which is in engagement with the internal thread 15 of the spindle nut 5. The external thread does not have to be over the whole Length have the same slope, different gradients and gradient ranges are also possible.

Figure 6 shows another embodiment of a device 50 with a rotary damper 1, wherein here again a rotatable on a coupling rod 3 threaded spindle 4 is provided, which is in engagement with a rotatably received spindle nut 5. The spindle nut 5 is received on the mounting bracket 20. Terminal units 151 and 152 are again used for fastening the device 50. Again, the device may be pivotally received about pivot axes 24 and a fastening bolt 27.

At the connection unit 152 or adjacent thereto, a motor 29 can be seen here, which can be supplied with electricity by the coupling rod 3, for example. The motor 29 is used for active rotation of the threaded spindle 4 and is held against rotation on the mounting bracket 20 itself. There are in the

Mounting bracket 20 grooves formed in the corresponding fingers of the motor 29 engage, so that the motor 29 is axially displaceable along the mounting bracket 20, but rotatably received therein. Thereby, the motor 29 can be used to actively rotate the threaded spindle 4, so that an active change in length of the device 50 is possible. As a result, in use as a door component 100, for example, a car door can also be partially or completely opened or closed actively or semi-actively (guided).

Semi-active means that the electric motor, the hand-guided movement z. B. a door by a user so supports (active moment generated) that at all opening and

Locking angles and in particular involving various friction, kinematic changes and space conditions (vehicle is inclined) similar operating forces must be applied by the user (the user "leads" the door = guided door).

In doing so, this semi-active fashion can do so very quickly

shifting brakes of the brake unit are supported, resulting in in a particularly pleasant haptic opening and / or closing and / or pressing expresses. This is particularly advantageous in the inclined position (slope), if the door would open automatically due to gravity, but must be closed in the opposite direction. Here must be a fast

Switch between brake and drive so that it feels good to the touch. Fast and haptic advantageous here means preferably in a few milliseconds and continuously, so that soft transitions are possible. Two-stage clutches (engaged / disengaged) lead to poor results (jerky movements and peak loads), which are not accepted by vehicle manufacturers in the premium segment.

FIG. 7 shows a schematic diagram of the principle of operation of the magnetorheological transmission device 40 with the basic principle of the rotary damper 1. This figure is basically also already shown in WO 2017/001696 AI. The

description in this regard and the entire contents of the

WO 2017/001696 AI is therefore included in the disclosure of

included in the present invention.

FIG. 7 shows two components 32 and 33 whose relative movement is to be damped or specifically influenced by the transmission device 40. For this purpose, a plurality of rotary bodies 2, which are embedded in a magnetorheological fluid 6, are arranged in a gap 35 between the components 32 and 33. The rotary body 2 act as magnetic field concentrators, which leads to a wedge effect with applied magnetic field and a relative movement of the components 32 and 33 to each other, resulting in wedge-shaped regions 46 in which the

collect magnetorheological particles and effectively decelerate via the wedge effect a further rotation of the rotary body 2 and a relative movement of the components 32 and 33 to each other.

In this case, the free distance 39 between the rotary body 2 and the surface of the components 32 and 33 is generally greater than one typical or average or maximum

Particle diameter of a magnetorheological particle in the magnetorheological fluid. This "MRF wedge effect" achieves a considerably greater influence than would be expected, which in particular leads to a high static force, which can be used as holding force.

The rotary damper 1 shown here in the embodiments all work according to this MRF wedge effect.

The high static force can be effectively used as a holding force and can be advantageously exploited, as shown in Figure 8, in which the force curve of the braking force of the magnetorheological transmission device 40 and the rotary damper 1 on the number of revolutions of the rotary body (and also the rotatable spindle unit) is. It turns out that at

Standstill of the rotary body 2 a very high braking force is generated. If the user overcomes the braking force that keeps the door open, the braking force drops significantly even with the magnetic field still applied with increasing speed, so that the user can re-engage the door even when the magnetic field is applied

Overcoming the sufficiently high holding power can easily close.

This effect means that in principle in any angular position, a high holding force is generated, the

But users can easily overcome to close the door. This will be a very comfortable feature for

Provided. List of reference numbers:

1 rotary damper 24 pivot axis

2 rotary bodies, rolling elements 25 joint

3 coupling rod 26 mounting hole

4 spindle unit, 27 fixing bolts

Threaded spindle 28 raceway

5 spindle unit, 29 motor

Spindle nut 30 Force curve

6 magnetorheological fluid 32 component

7 bearings 33 component

8 magnetic field source 34 separate part

9 electric coil 35 gap

10 magnetic field 39 free space

11 bobbin holder 40 transfer device

12 threaded nut 42 rotation axis

13 Seal 46 Wedge shape

14 external thread 50 device

15 internal thread 100 door component

16 hole nut 102 closed position

17 sleeve 103 opening position

18 intermediate ring 151 connection unit

19 Screw-in part 152 Connection unit

20 mounting bracket 154 door device

21 channel 160 sensor

22 mounting hole 200 motor vehicle

23 angle sensor

Claims

Claims :

1. Device (50), designed as a damper device with two relatively movable connection units (151, 152) and a controllable rotary damper (1) to a

Relative movement of the terminal units (151, 152) controlled to dampen each other,

wherein between the two connection units (151) two mutually engaged spindle units (4, 5) are arranged, wherein a spindle unit as a threaded spindle (4) and the other spindle unit as a spindle nut (5) is formed, and characterized

in that a first spindle unit (4) is rotatably connected to one of the connection units (151, 152)

Coupling rod (3) is attached and that between the

Coupling rod (3) and the first spindle unit (4) a magnetorheological transmission device (40) is arranged to influence a rotational movement of the first spindle unit (4).

2. Device (50), designed as a door component (100) with a controllable rotary damper (1) and two relatively movable connection units (151, 152), wherein one of the two terminal units (151, 152) with a

Support structure and the other of the two terminal units (151, 152) with a movable door device (154), in particular a vehicle (100), connectable to a movement of the door device (154) at least partially between a closed position (102) and a

Controlled opening position (103) to dampen

wherein between two connection units (151) two

spindle units (4, 5) which are in engagement with one another are arranged, one spindle unit being designed as a threaded spindle (4) and the other spindle unit being designed as a spindle nut (5),

characterized, in that a first spindle unit (4) is rotatably connected to one of the connection units (151, 152)

Coupling rod (3) is attached and that between the

3. Device according to one of the preceding claims, wherein the spindle units (4, 5) a linear movement of the

Connection units (151, 152) relative to each other in a rotational movement of the spindle units (4, 5) to each other.

4. Device according to one of the preceding claims, wherein in a relative movement of the terminal units (151, 152) to each other a relative axial position of

Spindle units (4, 5) to each other changes.

5. Device according to one of the preceding claims, wherein the first spindle unit formed as a threaded spindle (4) and / or wherein the second spindle unit is designed as a threaded nut (5).

6. Device according to one of the preceding claims, wherein the spindle nut (5) surrounds the threaded spindle (4) radially.

7. Device according to one of the preceding claims, wherein the threaded spindle (4) is designed to be at least 30% longer than the spindle nut (5).

8. Device according to one of the preceding claims, wherein the magnetorheological transmission device (40) is arranged radially within the first spindle unit (4).

9. Device according to one of the preceding claims, wherein the threaded spindle (4) relative to the spindle nut (5) and with respect to the coupling rod (3) is rotatable. Device according to one of the preceding claims, wherein radially between the coupling rod (3) and the first

Spindle unit (4) a ring-cylindrical cavity is formed.

Device according to one of the preceding claims, wherein i: the first spindle unit (4) a cylindrical sleeve (17) of a magnetically conductive material and rotatably connected to the first spindle unit (4) is connected.

Device according to one of the preceding claims, wherein the cavity is filled with a magnetorheological medium (6).

Device according to one of the preceding claims, wherein the first spindle unit (4) consists at least partially of a plastic.

Device according to one of the preceding claims, wherein the magnetorheological transmission device (40)

at least one electrical coil (9).

Device according to one of the preceding claims, wherein the electric coil (9) has turns wound around the coupling rod (3).

comprises at least one magnetic circuit, which one

Axial section in the coupling rod (3), an axial section in the cylindrical sleeve (17) and / or the first

Spindle unit (4), the electric coil and on at least one axial side of the electric coil (9) at least one arranged in the radial gap between the coupling rod (3) and the first spindle unit rotary body (2).

Device according to one of the preceding claims, wherein on both axial sides of the electric coil (9) in each case at least one rotary body (2) is arranged.

18. Device according to one of the preceding claims, wherein on at least one axial side of the electric coil (9) a plurality of rotary bodies (2) on the circumference of

Coupling rod (3) is arranged distributed.

19. Device according to one of the preceding claims, wherein the magnetic circuit on both axial sides of the electric coil (9) in the radial gap between the coupling rod (3) and the threaded spindle (4) arranged rotary body (2).

20. Device according to one of the preceding claims, wherein a plurality of magnetic circuits is formed.

21. Device according to one of the preceding claims, wherein an electrical connection cable for the electrical coil (9) through a channel (21) in the coupling rod (3) is supplied.

22. Device according to one of the preceding claims, wherein the coupling rod (3) pivotable about a transversely to

Coupling rod aligned pivot axis (24).

23. Device according to one of the preceding claims, wherein the first spindle unit (4) axially fixed to the

Coupling rod (3) is added.

24. Device according to one of the preceding claims, wherein the first spindle unit (4) over the axial

Setting range extends.

25. Device according to one of the preceding claims, wherein a motor (29) for driving the first spindle unit (4) is included.

26. Method for influencing a movement of a Door device (154) having a door component (100) with a controllable damper device and two relatively movable connection units (151, 152), wherein between two connection units (151) two mutually engaged spindle units (4, 5) are arranged, wherein a movement the door device (154) at least partially between a closed position (102) and a

Open position (103) is controlled, the

Damper device and a motor for driving one of the spindle units are controlled to a guided

To reach door movement.