DE202014001206U1 - Coupling head of an automatic central buffer coupling - Google Patents

Abstract

Coupling head (1) of an automatic central buffer coupling (100), which has a Willison profile with a large coupling claw (4) and a small coupling claw (5), a line coupling (20) with at least one coupling part (21) on the coupling head (1) is arranged for coupling lines, in particular for coupling pneumatic brake lines and / or supply lines and / or signal lines, between two adjacent car bodies, with a first rigidifying member (8), preferably in the form of a coupling horn, in the area of the large coupling claw (4) In the area of the small coupling claw (5) there is arranged a second rigidity member which is complementary to the first rigidity member (8), preferably in the form of a coupling pocket; and that a lever mechanism (50) is also provided for automatically advancing the coupling part (21) of the line coupling (20) from a first, retracted position into a second position advanced in the direction of the coupling plane (T), characterized in that the lever mechanism ( 50) consists of a carrier element (24) arranged on the coupling head (1), on which a second lever element (32) coupled to one another, power transmission levers (33) and connected levers (34) are rotatably arranged, such that in a horizontal plane parallel to the longitudinal extension of the carrier element (24), the lever (34) connected to a vertically aligned shaft (31) is rotatably coupled to the power transmission lever (33) and the power transmission lever (33) is rotatably coupled to the second lever element (32) and on the shaft (31 ) a torsion spring (36) is arranged, one end of which is attached to the carrier element (24) and the other end to the power transmission lever (33 ) is supported.

Description

The invention relates to a coupling head of an automatic central buffer coupling according to the preamble of independent claim 1.

Accordingly, the invention particularly relates to a coupling head of an automatic central buffer coupling having a Willison profile with a large coupling jaw and a small coupling jaw, wherein at the coupling head a line coupling is arranged with at least one coupling part for coupling lines, in particular of pneumatic brake lines and / or supply lines , but also electrical supply lines or signal lines, between two adjacent car bodies of a track-guided vehicle, in particular rail vehicle.

Central buffer couplings with Willison coupling heads serve to mechanically connect two adjacent car bodies, for example a rail vehicle, and are characterized by their robust construction, so that such coupling heads are frequently used in freight car couplings. The structure and operation of a coupling head type Willison are, for example, in the document DE 1 455 242 A described.

Technically, SA-3 type central buffer couplings represent a further development of the Willison coupling. Accordingly, the coupling head of an SA-3 type central buffer coupling also has a Willison profile with a large clutching claw, a small clutching claw and a clutching pocket located between the clutching claws.

Another central buffer coupling widely distributed in Europe for freight cars is the AK 69e central buffer coupling, whose coupling head is also provided with a Willison profile. Central buffer couplings of the type AK 69e are still frequently used in particular as ore wagon couplings. Due to the Willison profile, to form a mechanical connection between two adjacent car bodies, for example of a rail vehicle, the coupling head of an AK 69e central buffer coupling can also be coupled to the coupling head of a SA-3 or Willison type central buffer coupling.

Although a coupling head of an AK 69e central buffer coupling may be coupled directly to the coupling head of a Willison or SA-3 type central buffer coupling to form a mechanical connection between two adjacent bodies, the respective air line couplings of the different types of coupling are not matched to each other a direct coupling capability of the air line coupling of a coupling head belonging to a type AK 69e center buffer coupling with an air line coupling of a coupling head belonging to a Willison or SA-3 middle buffer coupling is not given.

So is out of the EP 2 371 657 A1 a coupling head is known, in the region of the large coupling claw, a first Anrmungsorgan, preferably in the form of a coupling horn, and in the region of the small clutch claw to the first Anrmungsorgan complementarily formed second Anstrehmachungsorgan, preferably in the form of a clutch bag, and that further comprises a lever mechanism is provided for the automatic ancestor of the coupling part of the line coupling from a first, retracted position to a second, in the direction of the coupling plane advanced position. The lever mechanism is operable by forming an engagement of the second Anstearing member with a correspondingly complementary thereto formed Anrmungsungsorgan a counter-coupling head in the coupling of the coupling head with the counter-coupling head.

Since this coupling head, on the one hand, has a Willison profile and, on the other hand, a construction based on the type Willison / SA-3 coupling, direct mechanical coupling of the coupling head according to the invention with operationally well-known Willison / SA-3 coupling heads is possible. In addition, due to the Willison profile of the coupling head a direct coupling capability to a coupling head of a central buffer coupling type AK 69e is also possible.

In addition to the mechanical coupling capability with existing WillisonSA-3 or AK 69e coupling heads, the coupling head according to the prior art is characterized in that a line coupling is arranged on the coupling head, which has a coupling part, which when coupling the coupling head with the coupling head a counter-coupling is movable from a first, retracted position into a second, in the direction of the coupling plane advanced position relative to the coupling head. In particular, when the coupling head is coupled with a coupling head of the same type, when forming the mechanical connection between the two coupling heads automatically move the corresponding coupling parts of the line couplings in each case in the second, advanced position. In this second, advanced position are the coupling parts of the line couplings in the common vertical center longitudinal plane of the two coupling heads, so that the line couplings are directly coupled together in their second position.

Specifically, the lever mechanism is configured to move the coupling portion of the pipe coupling to the second (advanced) position relative to the coupling head when a respective mating coupling member of the mating coupling head is received by the second rigidating member.

A coupling head, which is equipped with such, cooperating with the coupling part of the pipe coupling lever mechanism can be coupled with an identical counter-coupling head, wherein the coupling process automatically the coupling parts of the arranged to be coupled to the coupling heads line couplings advanced in the second detachable position. Thus, since the front end portions of the respective coupling parts are in common point of intersection of the vertical coupling plane and the vertical longitudinal sectional plane of the coupling heads, these abut each other relatively aligned, which allows the automatic coupling of the line couplings.

If, on the other hand, a coupling head equipped with a lever mechanism is coupled to a coupling head of, for example, a counter coupling type AK 69e, it must be taken into account on the one hand that an AK 69e coupling head is not equipped with a corresponding lever mechanism and, on the other hand, that such a coupling head has no Longer termificatory organs or the like, which form an engagement with the Anstälmungsorganen during the dome operation and thus actuate the lever mechanism. Accordingly, when coupling the coupling head with a coupling head of a counter coupling of the type AK 69e, the coupling part of the coupling head arranged on the pipe coupling is advanced by a different mechanism from the lever mechanism in the second, detachable position.

In detail, an operating lever connected to the coupling part for manual ancestor of the coupling part of the line coupling is provided in the second, in the direction of the coupling plane advanced position.

It is further provided that the coupling head has a projecting in the direction of the coupling plane horn, which serves and is designed, when coupling with the mating coupling head of a central buffer coupling type AK 69e usually designed as a pedal actuator for ancestors of the air coupling part of the mating coupling head arranged air line coupling to press. It is provided that in the coupling head, the line coupling is arranged in a plane below the coupling head and on the line height of the pneumatic brake lines or supply lines of a coupling head of a central buffer coupling type AK 69e. This allows a direct coupling of the pipe coupling arranged on the coupling head with the pneumatic brake line (s) and / or supply line (s) of the counter coupling head type AK 69e.

In one realization of the coupling head described, the lever mechanism provided for the automatic ancestor of the coupling part has a first horizontally rotatable lever element which, upon coupling of the coupling head with the coupling head of a counter-coupling, and in particular by forming an engagement between the second Anrstungsungsorgan of the coupling head and a corresponding complementary component of the counter-coupling head is pivotable about an axis of rotation in a horizontal plane. In addition, an at least substantially vertically extending shaft is provided, which is connected to the first lever element and defines the axis of rotation of the pivotable in a horizontal plane first lever member. In addition, a second, pivotable in a horizontal plane lever element is provided, which is connected to the coupling part of the line coupling on the one hand and the shaft on the other hand, that upon pivoting of the first lever member, the resulting rotational movement is transmitted via the shaft to the second lever element, consequently the coupling part the line coupling is moved in the direction of the coupling plane.

The second lever element may be designed as a pivoting lever with a first lever arm and an angled second lever arm to the first lever arm, wherein the vertical pivot axis of the lever element passes through the connecting region between the first and second lever arm. Conceivable here is that the first lever arm of the pivot lever is connected via a power transmission lever to the shaft, wherein the free end portion of the first lever arm in a horizontal plane pivotally mounted on a first end portion of the power transmission lever and the second end portion of the power transmission lever in a horizontal plane pivotally connected to a the shaft connected lever is articulated. The free end region of the second lever arm should in this case be pivoted in the horizontal plane on the line coupling.

Based on this problem, the invention has the object, a Coupling head of a central buffer coupling of the type mentioned in such a way that during the coupling process between the adjacent car bodies and the lines, especially the pneumatic brake lines and / or supply lines are automatically or simply coupled together by hand.

These objects are achieved by the subject matter of independent claim 1.

Advantageous developments of the solution according to the invention are specified in the dependent claims.

The invention is based on the basic idea that a lever mechanism is provided which consists of a arranged on the coupling head support member on which rotatably arranged a lever kinematics is provided, which consists of a coupled together second lever member, a power transmission lever and a lever connected. The coupling is designed such that in a horizontal plane parallel to the longitudinal extent of the support member connected to a vertically aligned shaft lever with the power transmission lever and the power transmission lever is rotatably coupled to the second lever member and on the shaft a torsion spring is arranged, which is with their one end on the carrier element and the other end on the power transmission lever is supported.

By this arrangement can be advantageously achieved, that on the one hand in the non-coupled training, the line arrangement remains in the retracted position due to the spring load of the torsion spring. This is achieved in that the other free ends of the power transmission lever and the associated lever are rotatably coupled to each other via a pivot point, wherein at a first position, the articulation point on one side of an imaginary connecting line between the articulation on the second lever member and the shaft is arranged and the force of the torsion spring pushes the power transmission lever into this position.

On the other hand it is achieved that due to the lever kinematics in the coupled training an automatically achievable locking is achieved in the other position, without the need, for example, a locking lever. This is achieved in that the other free ends of the power transmission lever and the associated lever rotatably coupled to each other via a pivot point, wherein in a second position, the articulation point on the other side of an imaginary connecting line between the articulation on the second lever member and the shaft is arranged and the deflection takes place against the force of the torsion spring, such that the power transmission lever and the connected lever are overstretched and an over-center position is reached. A self-locking is achieved.

In order to enable a simple manual actuation of the lever kinematics, in particular a transfer from the Übertotpunktstellung out, it is provided that at a free end of the shaft has a receptacle for a commercially available tool for introducing a torque. This receptacle is preferably a hexagon, so that a commercial hexagon wrench can be attached. Since hex keys usually have a lever, the user can simply transmit sufficient torque.

Hereinafter, an embodiment of the solution according to the invention will be described in detail with reference to the accompanying drawings.

Show it:

1 a first perspective view of an automatic central buffer coupling with a coupling head according to an embodiment of the present invention;

2 a second perspective view of the central buffer coupling according to 1 ;

3 a side view of the central buffer coupling according to 1 ;

4 a sectional view taken along the line AA in 3 through the pipe coupling arranged on the coupling head;

5 a partially sectioned bottom view of the central buffer coupling according to 1 ;

6 a plan view of a central buffer coupling according to 1 in a coupled state with a counter-coupling of the same type;

7 a partially sectioned bottom view of the central buffer coupling according to 1 in a coupled state with a counter-coupling of the same type;

8th a partial perspective view of the back of the coupling head in the central buffer coupling according to 1 ,

Hereinafter, the coupling head will be described by reference numerals. The equivalent components of a counter-coupling head are provided with the same reference numerals, only with the Difference that these include in addition to a better distinction an '(apostrophe).

In the 1 - 8th is an embodiment of a central buffer coupling 100 shown. This includes a coupling head 1 at the front end portion of a coupling shaft 2 , The coupling shaft 2 has an articulation at its end of the cart box end 3 on to the central buffer coupling 100 to articulate via a preferably all-sided stabilizing joint in conjunction with the pressure plate mounted on the car body train compression spring mechanism. The coupling head 1 itself is provided with a Willison contour and therefore has two rigid coupling claws, namely a Zugklaue 4 (hereinafter referred to as "large clutch claw") and a buffer claw 5 (hereinafter referred to as "small clutch claw").

The construction of the coupling head with the Willison profile is based on the construction of coupling types of the type Willison / SA-3, wherein in the coupling head according to the invention 1 also corresponding lock parts 6 As a result, company-proven and known coupling components are used for mechanical coupling. In particular, the coupling head 1 not only with an identical mating head 1' , but also with a coupling head of a central buffer coupling type AK 69e and with the known types of coupling type Willison / SA-3 and coupling heads of central buffer couplings type FT-Transpact mechanically coupled.

As shown, extends from the large coupling claw 4 in the direction of the coupling plane T, a first rigidification element 8th in the form of a front in the direction of the coupling plane T projecting Kupplungshornes. On the opposite side of the coupling half is a wing 10 provided in which a clutch bag 9 is designed as a second rigidi. The trained as a coupling horn first Erstrmachungsorgan 8th is of such size and shape that it is from the clutch bag 9 ' an opposite, similar coupling head 1' is readily recorded. The advantage of the first and second riggants 8th consists of a central buffer coupling with rigid coupling claws 4 . 5 to avoid vertical movements in the coupling profile in the coupled state.

Below the coupling head 1 is a pipe coupling 20 arranged. As will be described in detail below, the line coupling is 20 carried out such that these during the coupling process of the coupling head 1 with an identical counter-coupling head 1' automatically from a first, retracted position in a second, in the direction of the coupling plane T advanced position relative to the coupling head 1 is movable. The pipe coupling 20 is designed in this way and on the coupling head 1 arranged that the front end portion of a line coupling 20 belonging coupling part 21 in the second (advanced) position of the line coupling 20 in the intersection of the vertical coupling plane T and the vertical longitudinal sectional plane L of the coupling head 1 lies. This allows automatic coupling of the line couplings 20 when the coupling head 1 with an identical counter-coupling head 1' is coupled, since then the respective front end portions of the coupling parts 21 the line coupling 20 of the coupling head 1 on the one hand and the line coupling 20 ' of the counter-coupling head 1' on the other hand axially aligned with each other abut.

As already explained, in the illustrated embodiment, the line coupling 20 below the coupling head 1 arranged.

To the power couplings 20 to move from a retracted position and a second advanced position is a lever mechanism 50 intended. This lever mechanism 50 comprises a carrier element 24 , which at the coupling head 1 attached that line coupling 20 relative to the carrier element 24 in the longitudinal direction of the line plane between the first retracted and the second advanced position is movable. The carrier element 24 is in the illustrated embodiment via a screw connection to the coupling head 1 rigidly connected. These are in the carrier element 24 corresponding holes 16 provided for receiving screws, wherein in the holes 16 taken screws in corresponding at the coupling head 1 engage provided tapped holes. Of course, instead of a screw connection, it is also conceivable to use the carrier element 24 via a welded construction or otherwise at the coupling head 1 to fix.

In order to achieve that during the coupling process of the coupling head 1 with an identical counter-coupling head 1' automatically the line coupling 20 from its first, retracted position to its second, advanced position relative to the fixed to the coupling head 1 attached carrier element 24 is displaceable, comes the inventively designed lever mechanism 50 used, whose structure and operation is described below.

The lever mechanism 50 has a first lever element 30 in the area of the small clutch claw 5 of the Willison profile in the form of a clutch bag second Stromachungsorgan 8th around a rotation axis in horizontal Level is pivotally recorded. When coupling the coupling head 1 with an identical counter-coupling head 1' is initiated by the introduction of the coupling device designed as the first Erstrmachungsorgans 8th of the counter-coupling head 1' in that as a clutch bag 10 trained second Stromachungsorgan of the coupling head 1 the rotatably mounted within the clutch pocket in the horizontal plane first lever member 30 pivoted.

As it is in particular the representation in 8th can be removed, is the first lever element 30 with a substantially vertical shaft 31 connected, this wave 31 the vertical axis of rotation of the first lever member 30 sets. When the first lever element 30 when initiating the coupling horn 8th' of the counter-coupling head 1' in the coupling pocket of the coupling head 1 Being pivoted in a horizontal plane is going over the shaft 31 the torque on a second lever element 32 transfer.

As described in detail below with particular reference to the illustration in, for example, FIG 5 and 7 is described, is the second lever element 32 pivotable in the horizontal plane and on the one hand with the line coupling 20 and on the other hand with the wave 31 connected such that during pivoting of the first lever member 30 the resulting rotational movement over the shaft 31 on the second lever element 32 As a result, the line coupling 20 is moved from its first, retracted position in the direction of the coupling plane T to its second, advanced position.

In detail, and as for example the representation in 5 can be removed, in the illustrated embodiment, the second lever element 32 designed as a pivotable in a horizontal plane pivot lever. This second lever element 32 is on one side with the rig 8th coupled, whereas the other free end on an axis on the support element 24 is arranged. Between the two free ends of the lever element 32 is a power transmission lever 33 pivoted in the formation of a lever, the other end in turn with a connected lever 34 is coupled, the free end rotatably mounted on the shaft 31 is applied. Between the transmission lever 33 and the connected lever 34 An angle between 0 and 90 degrees is included. This creates an angled connection. This is then occupied, if no merger of coupling heads 1 . 1' took place.

As for example the representation in 5 and 7 Can be taken, is on the shaft 31 at least one torsion spring 36 arranged. It has the function in the coupling process of the coupling head 1 with an identical counter-coupling head 1' over the first lever element 30 on the wave 31 to counteract transmitted torque. This has the consequence that when uncoupling, ie when disconnecting the coupling head 1 from an identical counter-coupling head 1' , due to using the torsion spring 36 on the wave 31 transmitted torque of the lever mechanism returns to its original position, in which the line coupling 20 in its first retracted position. Accordingly, the coupling head 1 designed the present invention, that during the coupling process with a matching counter-coupling head 1' not just a mechanical connection between the coupling heads 1 . 1' is realized, but also the line couplings 20 and thus in particular the pneumatic brake lines and / or supply lines are automatically coupled together. The special construction of the coupling head 1 further allows the coupling head 1 Also with the counter-coupling head of a central buffer coupling type AK 69e can be coupled. As already mentioned in the introduction to the description, central buffer couplings of the type AK 69e are currently still in larger quantities, especially for iron ore transports in use.

The power transmission lever 33 and the associated lever 34 are each hinged with their free ends. The connected lever 34 is at the shaft 31 hinged and the power transmission lever on the second lever element 32 , The other free ends of the power transmission lever 33 and the associated lever 34 are together via a point of articulation 51 rotatably coupled. An imaginary connecting line 52 between the articulation on the second lever element 32 and the wave 31 shows in itself two positions: a first in the uncoupled state ( 5 ); Here is the point of articulation 51 on one side of the imaginary connecting line 52 , The torsion spring 36 is also designed so that this is the power transmission lever 33 with which the torsion spring 36 is coupled, presses in this position. The second position is achieved in the coupled state, as it is in 7 is shown. Here is the point of articulation 51 on the other side of the imaginary connecting line 52 arranged and thus are the two levers, the power transmission lever 33 and the associated lever 34 overstretched. An over-center position has been reached, so that no locking is necessary.

If two different central buffer couplings are coupled together, it is necessary to use the line couplings 20 to drive in the direction of the coupling plane T. This does not happen automatically, but is done by hand. Around To make this possible, a receptacle for attaching a commercial tool is provided instead of an actuating lever. Preferably, a hexagon socket 53 provided, which can be operated by means of a standard hexagonal wrench. By twisting it can be done via the lever mechanism 50 the line coupling in the coupling plane T and also be transferred back. When unlocking and disconnecting the clutches, the torsion spring automatically moves the air clutch in the retracted, dome ready position.

In the following, with particular reference to the illustration in FIG 4 the structure of the line coupling used in the inventive solution 20 described.

The pipe coupling 20 , which are below the coupling head 1 is preferably arranged at the line level of the pneumatic brake lines and / or supply lines of a central buffer coupling type AK 69e, is in the illustrated embodiment with the aid of the already mentioned support member 24 in the longitudinal direction of the line plane relative to the carrier element 24 movable on the coupling head 1 attached. In detail, the line coupling 20 a relative to the carrier element 24 in the longitudinal direction of the line plane movable carriage element 25 and such in the carriage member 25 spring-mounted coupling part 21 in the second advanced position of the line coupling 20 the front end portion of the coupling part 21 is in the management level. As already stated, the ancestor of the line coupling takes place automatically in the second position when the coupling head 1 with an identical counter-coupling head 1' is coupled.

Here comes the lever mechanism 50 used, via the input movement of the coupling horn of the counter-coupling head 1' in the coupling pocket of the coupling head 1 is pressed (see in particular the illustration in 6 ).

Specifically, during the insertion movement, a in the clutch pocket of the coupling head 1 in a horizontal plane pivotally mounted first lever element 30 pivoted, with the resulting rotational movement over the shaft 31 on the on the support element 24 pivotally mounted in a horizontal plane second lever element 32 and from there as a linear movement on the longitudinal direction of the line plane relative to the carrier element 24 movable line coupling 20 is transmitted. On the other hand, the line coupling 20 also manually by pressing the hexagon socket 53 be moved to the second position.

That in the carriage element 25 spring-mounted coupling part 21 can - as the presentation in 4 for the embodiment as an air coupling part can be removed - a coupling body 26 and one of the coupling body 26 held and on the coupling body 26 preferably detachably mounted air coupling insert 27 have, wherein the air coupling insert 27 at its front, the coupling plane T end facing a mouthpiece seal 28 having.

As already mentioned, points in the example in 4 illustrated embodiments, the line coupling 20 a relative to the carrier element 24 in the longitudinal direction of the line plane movable carriage element 25 and one in the carriage member 25 spring-mounted coupling part 21 on. For the storage of the coupling part 21 In detail, a spring element 19 in the form of a compression spring used, which the coupling body 26 biased in the longitudinal direction of the line plane, wherein the spring element 19 on the carriage element 25 supported. The spring element 19 is suitably designed to provide, in the coupled state, sufficient contact between the lines to be connected, for example the mouthpiece seal 28 to press against the air pressure to a mouthpiece seal an air line coupling of a counter-coupling head or exert sufficient pressure on the contact surfaces of electrical contacts. Furthermore, the spring element is similar 19 the longitudinal movement of the coupled couplings 20 in the context of occurring longitudinal play between the tensile and compressive contour in the Willison profile of the mechanically interconnected coupling heads 1 . 1' out.

The invention is not limited to the embodiment described with reference to the drawings, but results from a synopsis of all the features disclosed herein.

LIST OF REFERENCE NUMBERS

1, 1 '

coupling head

2

coupling shaft

3

linkage

4

large clutch claw (pull claw)

5

small coupling claw (buffer claw)

6

cams

7

hose coupling

8, 8 '

Starrmachungsorgan

9, 9 '

clutch bag

10

wing

11

wing

16

drilling

19

spring element

20, 20 '

line coupling

21

coupling part

24

support element

25

carriage element

26

clutch body

27

Air coupling insert

28

Nozzle seal

30

lever member

31

wave

32

second lever element

33

Power transmission lever

34

connected lever

36

torsion spring

50

lever mechanism

51

articulation point

52

connecting line

53

Hexagonal shank

100

Central buffer coupling

L

Longitudinal section plane

T

coupling plane

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 1455242A [0003]
• EP 2371657 A1 [0007]

Claims (5)

Coupling head ( 1 ) an automatic central buffer coupling ( 100 ), which has a Willison profile with a large clutch claw ( 4 ) and a small clutch claw ( 5 ), wherein at the coupling head ( 1 ) a pipe coupling ( 20 ) with at least one coupling part ( 21 ) is arranged for coupling of lines, in particular for coupling of pneumatic brake lines and / or supply lines and / or signal lines, between two adjacent car bodies, wherein in the region of the large coupling claw ( 4 ) a first laminating member ( 8th ), preferably in the form of a coupling horn, and in the region of the small coupling claw ( 5 ) to the first staining member ( 8th ) are formed complementarily designed second Stromachungsorgan, preferably in the form of a clutch bag; and further that a lever mechanism ( 50 ) is provided for the automatic ancestor of the coupling part ( 21 ) of the line coupling ( 20 ) from a first, retracted position into a second, in the direction of the coupling plane (T) advanced position, characterized in that the lever mechanism ( 50 ) from one at the coupling head ( 1 ) arranged carrier element ( 24 ), on which rotatably arranged a coupled together second lever element ( 32 ), Power transmission lever ( 33 ) and linked levers ( 34 ) are provided such that in a horizontal plane parallel to the longitudinal extent of the carrier element ( 24 ) on a vertically oriented shaft ( 31 ) linked levers ( 34 ) with the power transmission lever ( 33 ) and the power transmission lever ( 33 ) with the second lever element ( 32 ) is rotatably coupled and on the shaft ( 31 ) a torsion spring ( 36 ) is arranged, which with its one end on the support element ( 24 ) and the other end on the power transmission lever ( 33 ) is supported. Coupling head according to claim 1, characterized in that at a free end of the shaft ( 31 ) has a receptacle for a commercially available tool for introducing a torque. Coupling head according to claim 2, characterized in that the receptacle is a hexagonal socket ( 53 ) is arranged. Coupling head according to at least one of claims 1 to 3, characterized in that the further free ends of the power transmission lever ( 33 ) and the connected lever ( 34 ) with each other via an articulation point ( 51 rotatably coupled, wherein at a first position of the articulation point ( 51 ) on one side of an imaginary connecting line ( 52 ) between the articulation on the second lever element ( 32 ) and the wave ( 31 ) is arranged and the force of the torsion spring ( 36 ) the power transmission lever ( 33 ) presses in this position. Coupling head according to at least one of the preceding claims, characterized in that the further free ends of the power transmission lever ( 33 ) and the connected lever ( 34 ) with each other via an articulation point ( 51 rotatably coupled, wherein at a second position of the articulation point ( 51 ) on the other side of an imaginary connecting line ( 52 ) between the articulation on the second lever element ( 32 ) and the wave ( 31 ) is arranged and the deflection against the force of the torsion spring ( 36 ), such that the power transmission lever ( 33 ) and the connected lever ( 34 ) are overextended and an over-center position is reached.

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