DE102016223369A1 - Switchable freewheel with torque limiter - Google Patents

Abstract

The invention relates to a clamping freewheel (1), in particular a clamping roller freewheel, comprising a ring element (2), in particular an inner ring or an outer ring, with at least one clamping ramp (3) for clamping a clamping element (4), a clamping element (4) per clamping ramp (3 ), which is arranged within the at least one clamping ramp (3), wherein the at least one clamping ramp (3) has at least a first (5) and a second region (6) each having different distances to the axis of rotation (A) of the clamping freewheel (1 ), wherein the first portion (5) of the power interruption of the ring member (2) on the clamping element (4), wherein the second region (6) of the power transmission from the ring member (2) to the clamping element (4) is used, and wherein the clamping freewheel (1) comprises a positioning element (7) for positioning the clamping element (4) relative to the clamping ramp (3), wherein the positioning element (7) in a first state, the clamping element (4) in the first region of Klemmra mpe (5) positioned to interrupt a transmission of force from the ring element (2) to the clamping element (4), and wherein the positioning element (7) releases the clamping element (4) within the clamping ramp (3) in a second state To ensure movement of the clamping element (4) along the clamping ramp (3). Furthermore, the invention relates to a freewheel assembly (10) comprising a clamping freewheel (1).

Description

The invention relates to a clamping freewheel, in particular clamping roller freewheel, with a ring element, in particular an inner ring or an outer ring, with at least one clamping ramp for clamping a clamping element, and with a clamping element per clamping ramp, which is arranged within the at least one clamping ramp. Furthermore, the invention relates to a freewheel assembly with a clamping freewheel.

A conventional freewheel or a conventional clamping freewheel is a directional clutch and usually has an inner, an outer ring and a cage with pinch rollers and springs. In this case, the clamping freewheel is capable of decoupling a part of a drive train from a rotational movement in the event of changing load conditions.

Freewheels are usually z. B. used as backstops or overrunning clutches or are used to switch a planetary gear.

A freewheel from the prior art always activated and deactivated by itself when the corresponding relative speed between the inner and outer ring is reached. In this way, a decoupling is possible, whereby z. B. a motor starter can be protected against mechanical damage.

When comparing the motor starter and the motor, the motor starter has a slower speed, which means that it must be protected against direct coupling with the motor.

However, in novel drive concepts, such as in a hybrid vehicle, it is necessary to decouple the electric motor or the internal combustion engine or both simply and quickly from the driven wheels and a transmission, even if a corresponding relative speed between inner and outer rings for power transmission is achieved.

It is therefore an object of the present invention to provide a clamping freewheel and a freewheel assembly, which are inexpensive and material-saving to produce and ensure a simple and fast activation and deactivation for the transmission of torque.

This object is achieved by the features of the independent claims. Further advantageous developments are the subject of the dependent claims.

According to the invention, in a first aspect of the present invention, a clamping freewheel, in particular a clamping roller freewheel, comprises a ring element, in particular an inner ring or an outer ring, with at least one clamping ramp for clamping a clamping element.

Preferably, the clamping freewheel on a clamping element per clamping ramp, which is disposed within the at least one clamping ramp, wherein conveniently the at least one clamping ramp has at least a first and a second region, each comprising different distances to the axis of rotation of the clamping freewheel.

It is advantageous if the first region of the force interruption of the ring member is used on the clamping element, wherein preferably the second region of the power transmission from the ring member to the clamping element is used.

Conveniently, the clamping freewheel comprises a positioning element for positioning the clamping element relative to the clamping ramp. Thus, the position of the clamping element can be set relative to the ring element, whereby the operation of the freewheel is determinable.

Furthermore, it is advantageous if, in a first state, the positioning element positions the clamping element in the first region of the clamping ramp in order to interrupt a force transmission from the ring element to the clamping element. Consequently, the freewheel can be brought into a mode in which no torque can be transmitted.

It is also advantageous if, in a second state, the positioning element releases the clamping element within the clamping ramp in order to ensure a movement of the clamping element along the clamping ramp. In this mode, the freewheel can perform its usual function and transmit a torque.

It is also preferable if the positioning element per clamping element has a positioning arm. This has the advantage that the positioning arm is displaceable relative to the clamping ramp in order to position the clamping element relative to the clamping ramp. Thus, it is thus possible to use the positioning arm to move a clamping element along the clamping ramp and thus to determine the operation of the freewheel.

Furthermore, it is preferred that the clamping freewheel has a cage for the clamping element and a spring per clamping element in order to hold the clamping element and to place relative to the clamping ramp. In this way, various clamping elements can be prepositioned by means of the cage and the spring and thus along the circumference of the Freewheel be arranged at equal intervals to each other.

Furthermore, it can be provided that preferably the positioning element is movable relative to the cage. Thus, so cage and positioning can be rotated against each other.

Preferably, the cage is arranged on the ring element, preferably fixed. Thus, therefore, the positioning is also movable relative to the ring member, wherein conveniently the ring member is rotatably connected to the cage.

Furthermore, it is advantageous if the positioning element has an actuator in order to ensure a relative positioning of the positioning element to the ring element or to the cage. Thus, the position of the positioning element relative to the cage by means of the actuator is variable.

Preferably, the ring element or the cage comprises an actuating element. In this way, the position of the ring element and / or the cage relative to the positioning element by means of the adjusting element is variable.

Preferably, an actuator is disposed between the actuator and the actuator to vary the relative position of the positioning member to the ring member and / or to the cage. Thereby, it is preferably possible that the clamping freewheel is switchable in the first or second state by means of an actuator. Thus, therefore, the freewheel by means of the actuator and the actuating element in the first or second state, as described above, are switched.

It is also advantageous if the positioning element has a positioning section in order to ensure relative positioning of the positioning element relative to the cage or to the ring element.

Preferably, the cage or the ring element comprises an actuating arm. Even so, a relative positioning of the cage or the ring element can be ensured to the positioning.

Conveniently, the adjusting portion and the actuating arm via an energy storage, preferably a spring, connected to the clamping freewheel, in particular after failure or deactivation of an actuator, preferably arranged between the ring element and positioning or between cage and positioning for relative rotation of the two to each other, in the first or second state. Thus, therefore, by means of activation of an actuator, the clamping freewheel according to the invention can be switched to the first or second state, wherein by deactivating the actuator, the clamping freewheel according to the invention can be switched from the first or second state back to the second or first state by means of the energy store.

It is also advantageous if the at least one clamping ramp has at least one first and one second sub-segment, wherein preferably the second region of the clamping ramp has at least a first and a second sub-segment. Thus, therefore, the second area of the clamping ramp is further subdivided.

Conveniently, the second sub-segment is designed as a power transmission area such that a relative movement between the clamping element and the ring element can be prevented. In other words, the power transmission area is formed so that in this the clamping element is clamped against the ring member, so that no relative movement between the two takes place. In this case, a maximum of torque can be transmitted over the freewheel.

Further, it is preferred that the first sub-segment is designed as an overload region such that a relative movement between the clamping element and ring element can be ensured, whereby a force transmission from the ring element on the at least one clamping element can be limited or at least reduced. In other words, the overload range is designed so that in this the torque to be transmitted is limited or reduced to the freewheel before mechanical destruction by z. B. to protect voltage peaks in the form of torque surges.

Advantageously, upon rotation of the ring member for power transmission, the first sub-segment follows the second sub-segment, so preferably in case of overload, the clamping member moves from the second sub-segment to the first sub-segment to limit the power transmission between the first sub-segment of the at least one clamping ramp and the clamping element , This allows the freewheel before mechanical destruction by z. B. voltage peaks are protected in the form of torque surges.

Preferably, the at least one clamping ramp extends in the circumferential direction.

A second aspect of the present invention includes a freewheel assembly with a detent freewheel.

It is expressly understood that the features of the clamp freewheel, as mentioned in the first aspect, individually or can be combined with each other in the freewheel arrangement application.

In other words, the features mentioned above under the first aspect of the invention relating to a clamping freewheel can also be combined here with further features in the second aspect of the invention.

Advantageously, the freewheel assembly comprises a clamping freewheel with a first ring element, in particular an inner ring or an outer ring, and with at least one clamping ramp for clamping a clamping element.

It is advantageous if the first ring element comprises a clamping element per clamping ramp, which is arranged within the at least one clamping ramp.

Preferably, the at least one clamping ramp has at least one first and one second region, each of which comprises different distances from the rotational axis of the clamping freewheel.

Furthermore, it is favorable if the freewheel arrangement comprises a second ring element, in particular an outer ring or an inner ring.

It is also preferred that the freewheel arrangement or the clamping freewheel comprises a positioning element for positioning the clamping element relative to the clamping ramp. Thus, the position of the clamping element can be set relative to the ring element, whereby the operation of the freewheel is determinable.

In a first state, the positioning element preferably positions the clamping element in the first region of the clamping ramp in order to ensure a force interruption from the ring element or from the ring elements to the clamping element. As a result, the freewheel can be brought into a mode in which no torque can be transmitted.

Furthermore, it is advantageous if the positioning element releases the clamping element within the clamping ramp in a second state in order to ensure a movement of the clamping element along the clamping ramp. In this mode, the freewheel can perform the known function and transmit torque at corresponding relatively rotational speeds between the ring elements.

It is also advantageous if the at least one clamping ramp has at least one first and one second sub-segment, wherein preferably the second region of the clamping ramp has at least a first and a second sub-segment. Thus, therefore, the second area of the clamping ramp is further subdivided.

It is also advantageous when the second sub-segment is designed as a power transmission area such that the clamping ramp and the clamping element clamp, in particular the clamping condition tanα <μ meet. As a result, preferably a force transmission from the first ring element via the clamping element to the second ring element can be ensured.

Furthermore, it can be provided that the first sub-segment is designed as an overload region such that the clamping ramp and the clamping element slip, in particular meet the slip condition tanα≥μ. In this way, a force transmission from the first ring element via the clamping element to the second ring element can be reduced. Thus, voltage peaks or torque surges can be compensated within the clamping freewheel or freewheel arrangement without mechanical destruction takes place.

Advantageously, the positioning element is movable relative to the ring elements. Thus, therefore, the positioning can be rotated relative to the ring elements.

Preferably, in the first state, the positioning element spaced the clamping element of the first or second ring member. Thus, the clamping freewheel or the freewheel assembly is switched to a state or mode in which a transmission of torque is not possible.

In other words, it is advantageous if, in the first state, the positioning element separates the clamping element from the first ring element and presses against the second ring element. In this way, a decoupling of the first and second ring element is possible, whereby a torque transmission can be actively deactivated by means of the positioning element.

It is also possible that in the first state, the positioning element, the clamping element spaced from the second ring member and presses against the first ring member. In this way, a decoupling of the first and second ring member is possible, whereby a torque transmission can be actively deactivated by means of the positioning element.

Conveniently, the first ring element and the second ring element are arranged concentrically to one another. Thus, they can rotate about a common axis of rotation.

The first ring element preferably forms an outer ring and the second ring element forms an inner ring, or the first ring element forms an inner ring and the second ring element forms an outer ring.

Hereinafter, the inventive idea presented above is expressed in other words.

This idea preferably concerns - simplified shown - a clamping freewheel, which is preferably used in a vehicle hybrid transmission. Here, the clamping freewheel preferably serves the switching of a planetary gear. Furthermore, the clamp freewheel can conveniently protect against the transmission of an overload torque.

In other words, should ideally be mapped with a clamp freewheel or with a freewheeling arrangement two different switching states.

Here, a state / mode A (default) of the freewheel assembly is favorably designed such that an inner ring and an outer ring of the freewheel assembly can rotate relative to each other in both directions.

Advantageously, a state / mode B of the freewheel assembly is formed such that an inner ring and an outer ring can be rotated relative to each other only in a first direction, whereas rotation in a second direction, which is preferably oriented opposite to the first direction, is blocked.

Further, it is advantageous if the freewheel or clamping freewheel or the freewheel assembly can decelerate the inner ring or outer ring (in the case of a power transmission between the inner ring and the outer ring), without damaging surrounding components. This is conveniently accomplished by using torque limiting. In the case of a faulty switching operation, this does not damage the attachments.

Furthermore, it is advantageous if the clamping freewheel or freewheel arrangement automatically changes to mode A.

Preferably, a clamping freewheel or freewheel arrangement is supplemented by an additional cage (switching cage or positioning element), which is favorably rotatable relative to a "carrier cage" or cage, which clamping elements for clamping between a first and a second ring element or between an inner ring and an outer ring.

In this case, the switching cage preferably positions the clamping element in mode A such that they have no contact with the inner ring or with the outer ring or with the first or second ring element and thus no clamping can occur.

In mode B, the switching cage is conveniently positioned so that the clamping members are freely movable and the contact between the inner ring and the outer ring can be restored.

Advantageously, the switching cage is held in the mode A by tension springs, so that in case of failure of the power supply of an actuator, this position is set automatically.

The actuator preferably has the task of actively rotating the switching cage relative to the carrier cage in order to be able to switch between the mode A and the mode B.

It is advantageous if mode B can only be set by active delivery of an actuator.

Furthermore, the use of clamping ramps with increased ramp angle at the outlet of the ramp geometry is advantageous in order to achieve a targeted slippage of the inner ring or the outer ring.

The increased ramp angle preferably results in that the clamping condition tan α <μ, which depends on the friction and the clamping angle, is no longer given.

It is also advantageous if the outer ring or a ring element is soft and can widen so that the clamping elements can continue to "roll up" the clamping ramps.

Conveniently, the maximum transmissible torque depending on the dimension of the clamping elements, the ring members and the inner ring and the outer ring can be adjusted freely.

• 1 eine Explosionsansicht eines erfindungsgemäßen Klemmfreilaufs aus einer ersten Perspektive;
• 2 eine weitere Explosionsansicht eines erfindungsgemäßen Klemmfreilaufs aus einer ersten Perspektive;
• 3 eine Explosionsansicht eines erfindungsgemäßen Klemmfreilaufs aus einer zweiten Perspektive;
• 4 eine Explosionsansicht einer erfindungsgemäßen Freilaufanordnung;
• 5 eine 3-dimensionale Ansicht auf eine erfindungsgemäße Freilaufanordnung;
• 6 eine Draufsicht auf die erfindungsgemäße Freilaufanordnung aus 5 in einem ersten Zustand;
• 7 eine vergrößerte Detailansicht aus 6;
• 8 eine Draufsicht auf die erfindungsgemäße Freilaufanordnung aus 5 in einem zweiten Zustand; und
• 9 eine vergrößerte Detailansicht aus 8.

The invention will be explained in more detail with reference to an embodiment in conjunction with accompanying drawings. These show schematically:

• 1 an exploded view of a clamping freewheel according to the invention from a first perspective;
• 2 a further exploded view of a clamping freewheel according to the invention from a first perspective;
• 3 an exploded view of a clamping freewheel according to the invention from a second perspective;
• 4 an exploded view of a freewheel assembly according to the invention;
• 5 a 3-dimensional view of a freewheel assembly according to the invention;
• 6 a plan view of the freewheel assembly according to the invention 5 in a first state;
• 7 an enlarged detail view 6 ;
• 8th a plan view of the freewheel assembly according to the invention 5 in a second state; and
• 9 an enlarged detail view 8th ,

In the following description, like reference characters will be used for like items.

1 shows an exploded view of a clamping freewheel according to the invention 1 from a first perspective.

Shown in more detail 1 a clamping freewheel 1 , in particular clamping roller freewheel, with a ring element 2 , in an embodiment of an outer ring, which various clamping ramps 3 (extend in the circumferential direction U ) each for clamping a clamping element 4 includes.

In this case, the ring element 2 on its outer side or on its outer lateral surface actuating elements 12 on, the relative positioning to a positioning element 7 serve.

The clamping freewheel 1 also has a Ka 9 for the clamping elements 4 and a spring 10 per clamping element 4 on to a clamping element 4 to hold and relative to the clamping ramp 3 to position.

The Ka 9 includes sliders 9A, which provides improved sliding between the Kä 9 and an inner ring, not shown, and the outer ring 2 or the ring element 2 enable.

When assembled, the Kä 9 on the ring element 2 arranged or within the ring member 2 arranged and with the ring element 2 rotatably connected.

As already mentioned, the clamping freewheel comprises 1 a positioning element 7 , This serves to position the clamping elements 4 relative to the respective clamping ramps 3.

The positioning element 7 is designed so that this relative to Ka 9 , preferably rotatable, in particular in the circumferential direction U , is movable.

The positioning element 7 has per clamping element 4 a positioning arm 8th , each positioning arm 8th relative to the respective clamping ramp 3 is slidable to the clamping element 4 relative to the clamping ramp 3 to position.

For mechanical stabilization are two positioning arms 8th connected by a bridge.

Furthermore, the positioning element 7 an actuator 11 on to a relative positioning of the positioning element 7 to the ring element 2 and therefore also to the Ka 9 to ensure.

Between the actuator 11 and an actuator 12 of the ring element 2 an actuator (not shown) is arranged to adjust the relative position of the positioning element 7 to the ring element 2 or to the Ka 9 to vary, in particular to actively vary.

Furthermore, the positioning element 7 several parking sections 13 and the Ka 9 several actuating arms 14 in addition to a relative positioning of the positioning 7 to the Ka 9 and thus also to the ring element 2 to ensure.

In each case a parking section 13 and an actuator arm 14 are about an energy storage 15 , preferably designed as a spring, connected to the clamping freewheel 1 , in particular after failure / deactivation of the actuator (not shown), which between the ring element 2 and the positioning element 7 for relative rotation of the two is arranged to each other to lead to a predetermined state (a first or second state).

As 1 also shows, is the Ka 9 , the ring element 2 and the positioning element 7 concentric to the axis of rotation A of the clamp freewheel 1 arranged.

2 shows a further exploded view of a clamping freewheel 1 according to the invention from a first perspective, similar to 1 ,

In contrast to 1 shows 2 the Ka 9 and the positioning element 7 of the clamp freewheel 1 in an assembled state.

It can be seen that the energy storage 15 each one adjustment section 13 of the positioning element 7 and an actuator arm 14 of the cage 9 connect with each other.

Every energy store 15 causes the distance between a control section 13 and an actuator arm 14 as short as possible. In other words, the energy storage effect 15 a Traction, which strives for the distance between a control section 13 and an actuator arm 14 To shorten.

Regarding the further remarks, in order to avoid unnecessary repetition, reference is made to the explanations 1 referenced, which are analogously applicable here.

Out 2 It can also be seen that each positioning arm 8th of the positioning element 7 a corresponding clamping element 4 is assigned to this in its position relative to a respective clamping ramp 3 to vary.

There are two positioning arms each 8th connected via a jetty. However, this connection is purely optional, and it can be dispensed with, but are then preferably the positioning arms 8th mechanically stabilize accordingly.

3 shows an exploded view of a clamping freewheel according to the invention from a second perspective.

2 and 3 are with regard to the illustrated clamping freewheel 1 and its features are identical, but with the difference that 3 the outside of the positioning 7 shows, whereas 2 the inside of the positioning element 7 represents.

Concerning the further remarks, in order to avoid unnecessary repetition, reference is made to the Explanatory Notes to the 1 and 2 referenced, which are analogously applicable here.

4 shows an exploded view of a freewheel assembly according to the invention 20 ,

The freewheel arrangement 20 includes a clamp freewheel 1 as already concerning the 1 to 3 described.

The clamping freewheel 1 has a first ring element 2 , in the form of an outer ring, as well as several clamping ramps 3 for clamping a respective clamping element 4 on.

At the first ring element 2 is a clamping element 4 per clamping ramp 3 that inside a clamping ramp 3 is arranged, positionable.

Furthermore, the clamping freewheel comprises 1 a positioning element 7 for positioning a clamping element 4 or the clamping elements 4 relative to the respective clamping ramp 3 ,

Concerning the further explanations to the clamping freewheel 1 out 4 To avoid unnecessary repetition, refer to the Explanatory Notes to the 1 to 3 referenced, which are analogously applicable here.

The freewheel arrangement 20 also has a second ring element 21 , in the form of an inner ring, wherein the first ring element 2 and the second ring element 21 are arranged concentrically with each other.

In other words, is described in 4 only the clamp freewheel 1 out 3 shown, now around an inner ring 21 or a second ring element 21 is supplemented to a freewheel arrangement 20 to build.

5 shows a three-dimensional view of a freewheel assembly according to the invention 20 in an assembled state.

5 forms the fully assembled freewheel assembly 20 which is now ready for installation in a next larger unit.

Due to the fact that - as already mentioned to the previous figures - the positioning 7 relative to the Ka 9 or to the first ring element 2 is movable, is in the logical consequence also the positioning element 7 relative to the second ring element 21 or to the two ring elements 2 . 21 movable.

For the clamping elements touch or can on the outside of the second ring element 21 or inner ring rolling, as is typical for a freewheel.

Further shows 5 in that the second ring element 21 has at its center a connection for a shaft, wherein the connection is designed for a shaft-hub connection.

6 shows a plan view of the freewheel assembly according to the invention 5 in a first state, wherein 7 an enlarged detail view 6 represents.

In the following description, the 5 and 6 described together or simultaneously.

To show 6 and 7 in that one or each clamping ramp 3 a first 5 and a second area 6 each having different distances to the axis of rotation A of the clamp freewheel 1 or the freewheel assembly 20 include.

For simplicity, hereinafter merely a clamping ramp 3 with a clamping element 4 Of course, all designs are applicable to all clamping ramps 3 and clamping elements 4 that the clamp freewheel 1 or the freewheel assembly 20 have, apply.

As 6 and 7 show is inside the clamping ramp 3 a clamping element 4 in the first area 5 arranged.

The first area 5 serves the power interruption of the ring element 2 on the clamping element 4 , where the second area 6 the power transmission from the ring element 2 to the clamping element 4 serves.

It also includes how 6 and 7 show the clamp freewheel 1 the positioning element 7 or its positioning arm 8th for positioning a clamping element 4 relative to the clamping ramp 3 ,

The positioning element is positioned 7 or its positioning arm 8th in a first state, the clamping element 4 in the first area 5 the clamping ramp 3 to transfer power from the ring element 2 on the clamping element 4 to interrupt.

For this purpose, the positioning element is spaced apart in the first state 7 / the positioning arm 8th the clamping element 4 from the second ring element 21 and presses the clamping element 4 against the first ring element 2 , wherein the positioning element 7 itself also from the second ring element 21 is spaced. In this way, or in this state, the freewheel assembly 20 or their clamping freewheel 1 deactivated, so that the clamping freewheel 1 no forces or torques can be transmitted.

Furthermore, the second area 6 the clamping ramp 3 a first 15 and a second subsegment 16 on.

Here is the second subsegment 16 designed as a power transmission area such that a relative movement between the clamping element 4 and ring element 2 is preventable. Because only the prevention of a relative movement between the clamping element 4 and ring element 2 guarantees maximum power transmission.

The first subsegment 15 however, is designed as an overload region such that a relative movement between the clamping element 4 and ring element 2 is guaranteed, whereby a force transmission from the ring element 2 on the at least one clamping element 4 is limited.

In other words and referring to the freewheel assembly 20 expressed, is the second subsegment 16 is designed as a power transmission area such that the clamping ramp 3 and the clamping element 4 clamp to meet the clamping condition tan α <μ. As a result, a power transmission from the first ring element 2 over the clamping element 4 to the second ring element 21 gewährleistbar. In this case, a maximum of torque can be transmitted over the freewheel.

In contrast, with reference to the freewheel assembly 20 the first subsegment 15 designed as overload range such that the clamping ramp 3 and the clamping element 4 slip, so that the slip condition tan α≥μ can be satisfied.

As a consequence, this results in a power transmission from the first ring element 2 over the clamping element 4 to the second ring element 21 be limited. Thus, voltage peaks or torque surges can be compensated within the clamping freewheel or freewheel arrangement without mechanical destruction takes place.

Realiter jumps in a torque shock, the clamping element 4 along the clamping ramp 3 between the first and second sub-segments 15 . 16 back and forth, so as a result, the clamping element 4 or the clamping elements 4 both opposite the first ring element 2 as well as the second ring element 21 slip and thus transmit only a limited torque.

To the clamp freewheel 1 or the freewheel assembly 20 to bring in the first state, the positioning element 7 and the first ring element 2 or the outer ring twisted in opposite directions, so that the positioning 8th of the positioning element 7 the clamping element 3 in the first area 5 presses and thus the first state of the clamping freewheel 1 or the freewheel assembly 20 established.

In order to reach the first state, the distance X1 (see FIG. 7 ) between the actuator 11 of the positioning element 7 and the actuator 12 of the ring element 2 set, in particular by means of an actuator (not shown).

8th shows a plan view of the freewheel assembly according to the invention 20 out 5 in a second state, wherein 9 an enlarged detail view 8th represents.

In the following description, the 8th and 9 described together or simultaneously.

So show the 8th and 9 in that one or each clamping ramp 3 a first 5 and a second area 6 each having different distances to the axis of rotation A of the clamp freewheel 1 or the freewheel assembly 20 include.

For simplicity, hereinafter merely a clamping ramp 3 with a clamping element 4 Of course, all designs are applicable to all clamping ramps 3 and clamping elements 4 that the clamp freewheel 1 or the freewheel assembly 20 have, apply.

As 8th and 9 show is inside the clamping ramp 3 a clamping element 4 in the second area 6 arranged.

This second area 6 serves - as already to the 6 and 7 explained - the power transmission from the ring member 2 to the clamping element 4 ,

According to 8th and 9 includes the clamp freewheel 1 the positioning element 7 for positioning a clamping element 4 relative to the clamping ramp 3 , There is the positioning element 7 or its positioning arm 8th in a second state, the clamping element 4 within the clamping ramp 3 free to move the clamping element 4 along the clamping ramp 3 to ensure.

For this purpose, in the second state, the positioning element 7 such a procedure that its positioning 8th the clamping element 4 not touched and this thus free along the clamping ramp 3 can move. In this mode, the freewheel can perform the known function and transmit torque at corresponding relatively rotational speeds between the ring elements.

Furthermore, as with the 6 and 7 already explained - the second area 6 the clamping ramp 3 a first 15 and a second subsegment 16 on.

Here is the second subsegment 16 designed as a power transmission area such that a relative movement between the clamping element 4 and ring element 2 is preventable. Because only the prevention of a relative movement between the clamping element 4 and ring element 2 guarantees maximum power transmission.

The first subsegment 15 however, is designed as an overload region such that a relative movement between the clamping element 4 and ring element 2 is guaranteed, whereby a force transmission from the ring element 2 on the at least one clamping element 4 is limited.

Regarding further remarks on sub-segments 15 . 16 will refer to the explanatory notes to the 6 and 7 referenced, which are analogously apply here or apply.

In other words and referring to the freewheel assembly 20 expressed, follows upon rotation of the ring member 2 for power transmission, the first sub-segment 15 the second subsegment 16 so that in case of overload, the clamping element 4 from the second subsegment 16 towards the first subsegment 15 moved to the power transmission between the first sub-segment 15 the at least one clamping ramp 3 and the clamping element 4 to limit.

As a consequence, this results in a power transmission from the first ring element 2 over the clamping element 4 to the second ring element 21 be limited. Thus, voltage peaks or torque surges can be compensated within the clamping freewheel or freewheel arrangement without mechanical destruction takes place.

Realiter jumps in a torque shock, the clamping element 4 along the clamping ramp 3 between the first and second sub-segments 15 . 16 back and forth, so as a result, the clamping element 4 or the clamping elements 4 both opposite the first ring element 2 as well as the second ring element 21 slip and thus transmit only a limited torque.

To the clamp freewheel 1 or the freewheel assembly 20 to bring into the second state, the positioning element 7 and the first ring element 2 or the outer ring rotated in such a way that the positioning 8th of the positioning element 7, the clamping element 3 releases and thus the second state of the clamping freewheel 1 or the freewheel assembly 20 established. In this mode, the freewheel can perform the known function and transmit and limit torque at respective relatively rotational speeds between the ring elements.

In order to achieve the second state, the distance X1 (see FIG. 7 ) is shortened to the distance X2 (cf. 9 ).

In order to achieve the distance X2 or the second state, the distance between the actuator 11 of the positioning element 7 and the actuator 12 of the ring element 2 reduced.

This is achieved, for example, by the fact that the actuator (not shown) actively distances between the actuator 11 of the positioning element 7 and the actuator 12 of the ring element 2 reduced. Thus, the clamping freewheel 1 or the freewheel assembly 20 switchable in the first or second state by means of the actuator.

Alternatively, the distance can also be done by deactivating the actuator, since then the energy storage 15 which is between the ring element 2 and the positioning element 7 is arranged for relative rotation of the two to each other, the freewheel 20 returns to a predetermined state or in the second state.

In other words, the adjustment section 13 and the actuator arm 14 over the energy storage 15 , designed as a spring (cf. 1 to 4 ), connected to the clamp freewheel 1 , in particular after failure / deactivation of an actuator, arranged between the Kä 9 and the positioning element 7 to lead to the second state.

LIST OF REFERENCE NUMBERS

1

Clamping freewheel

2

ring element

3

clamping ramp

4

clamping element

5

first area

6

second area

7

positioning

8th

positioning

9

Cage

10

feather

11

actuator

12

actuator

13

setting section

14

actuating arm

15

first subsegment

16

second subsegment

20

Freewheel arrangement

21

second ring element

A

axis of rotation

D

direction of rotation

U

circumferentially

Claims (10)

Clamping freewheel (1), in particular clamping roller freewheel, comprising: a ring element (2), in particular an inner ring or an outer ring, with at least one clamping ramp (3) for clamping a clamping element (4), a clamping element (4) per clamping ramp (3), which is arranged within the at least one clamping ramp (3), - wherein the at least one clamping ramp (3) has at least one first (5) and one second region (6), each of which has different distances from the axis of rotation (A) of the clamping freewheel (1), - wherein the first region (5) of the power interruption of the ring element (2) on the clamping element (4), - Wherein the second region (6) of the power transmission from the ring member (2) to the clamping element (4) is used, and - wherein the clamping freewheel (1) comprises a positioning element (7) for positioning the clamping element (4) relative to the clamping ramp (3), - wherein the positioning member (7) in a first state, the clamping element (4) in the first region (5) of the clamping ramp (3) positioned to interrupt a power transmission from the ring member (2) on the clamping element (4), and - Wherein the positioning member (7) in a second state, the clamping element (4) within the clamping ramp (3) releases to ensure movement of the clamping element (4) along the clamping ramp (3). Clamp freewheel after Claim 1 - wherein the positioning element (7) per clamping element (4) has a positioning arm (8), - wherein preferably the positioning (8) relative to the clamping ramp (3) is displaceable to the clamping element (4) relative to the clamping ramp (3) position. Clamp freewheel after Claim 1 or 2 in that the clamping freewheel (1) has a cage (9) for the clamping element (4) and a spring (10) per clamping element (4) in order to hold the clamping element (4) and place it relative to the clamping ramp (3), - wherein preferably the positioning element (7) relative to the cage (9) is movable, - wherein preferably the cage (9) is arranged on the ring element (2), is preferably fixed. Clamp freewheel after one of the Claims 1 to 3 in that the positioning element (7) has an actuator (11) in order to ensure relative positioning of the positioning element (7) to the ring element (2) or cage (9), wherein preferably the ring element (2) or the cage ( 9) comprises an actuating element (12), wherein - preferably an actuator between the actuator (11) and the adjusting element (12) is arranged to the relative position of the positioning element (7) to the ring element (2) or to the cage (9) vary, - wherein preferably the clamping freewheel (1) is switchable in the first or second state by means of an actuator. Clamp freewheel after one of the Claims 1 to 4 in that the positioning element (7) has a positioning section (13) in order to ensure relative positioning of the positioning element (7) to the cage (9) or to the ring element (2), wherein preferably the cage (9) or the ring element ( 2) comprises an actuating arm (14), - wherein preferably the adjusting section (13) and the actuating arm (14) via an energy store (15), preferably a spring connected to the clamping freewheel (1), in particular after failure of an actuator, arranged between ring element (2) and positioning element (7) or between cage (9) and positioning element (7) for relative rotation of the two to each other, to lead to the first or second state. Clamp freewheel after one of the Claims 1 to 5 in which the at least one clamping ramp (3) has at least one first (15) and one second subsegment (16), wherein preferably the second region (6) of the clamping ramp (3) comprises at least a first (15) and a second subsegment ( 16), wherein - preferably wherein the second sub-segment (16) is designed as a force transmission area such that a relative movement between clamping element (4) and ring element (2) can be prevented, - wherein preferably the first sub-segment (15) is designed as an overload region such a relative movement between clamping element (4) and ring element (2) can be ensured, whereby a force transmission from the ring element (2) to the at least one clamping element (4) can be limited. Clamp freewheel after one of the Claims 1 to 6 in which the first subsegment (15) follows the second subsegment (16) during a rotation of the ring element (2), so that in the event of an overload the clamping element (4) preferably moves from the second subsegment (16) towards the first subsegment (16). 15) in order to limit the transmission of force between the first sub-segment (15) of the at least one clamping ramp (3) and the clamping element (4), wherein preferably the at least one clamping ramp (3) extends in the circumferential direction (U). Freewheel assembly (20) comprising - a clamping freewheel (1), in particular according to one of Claims 1 to 7 , - with a first ring element (2), in particular an inner ring or an outer ring, with at least one clamping ramp (3) for clamping a clamping element (4), - wherein the first ring element (2) is a clamping element (4) per clamping ramp (3) , which is arranged within the at least one clamping ramp (3), - wherein the at least one clamping ramp (3) has at least a first (5) and a second region (6), each having different distances to the axis of rotation (A) of the clamping freewheel ( 1), - with a second ring element (21), in particular an outer ring or an inner ring, - with a positioning element (7) for positioning the clamping element (4) relative to the clamping ramp (3), - wherein the positioning element (7) in one first state, the clamping element (4) in the first region (5) of the clamping ramp (3) positioned to ensure a power interruption of the ring member (2, 21) on the clamping element (4), and - wherein the positioning element (7) in a second condition and the clamping element (4) within the clamping ramp (3) releases to ensure movement of the clamping element (4) along the clamping ramp (3). Freewheel arrangement after Claim 8 - wherein the at least one clamping ramp (3) has at least a first (15) and a second subsegment (16), - wherein the second subsegment (16) is designed as a force transmission region such that the clamping ramp (3) and the clamping element (4 ), in particular satisfy the clamping condition tan α <μ, whereby a power transmission from the first ring element (2) via the clamping element (4) to the second ring element (21) can be ensured, - preferably wherein the first sub-segment (15) is designed as an overload region such that the clamping ramp (3) and the clamping element (4) slip, in particular meet the sliding condition tanα≥μ, whereby a force transmission from the first ring element (2) via the clamping element (4) to the second ring element (21) can be reduced. Freewheel arrangement after Claim 8 or 9 in which the positioning element (7) preferably separates the clamping element (4) from the first or second ring element (2, 21) in the first state, wherein preferably in the first state, the positioning element (7) the clamping element (4) from the first ring member (2) spaced and against the second ring member (21) presses, - preferably wherein the positioning member (7) in the first state, the clamping element (4) spaced apart from the second ring element (21) and pressed against the first ring element (2), wherein preferably the first ring element (2) and the second ring element (21) are arranged concentrically to one another, - wherein preferably the first ring element (2) forms an outer ring and the second ring element (21) forms an inner ring, or wherein the first ring element (2) an inner ring and the second ring member (21) forms an outer ring.

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