EP2821181B1 - Clamping device - Google Patents

Description

The invention relates to a tensioning device, in particular a toggle lever tensioning device, primarily for use in the bodywork of the automotive industry.

By hand or by pressure medium pressure, primarily by air pressure actuated clamping devices are known in different constructions. Such tensioning devices, for. B. toggle clamps are not horizontal, but also arranged under any spatial conditions. Especially when installing overhead, it may, for. B. at pressure drop or When heavy loads are connected to the clamp arm, it happens that the clamp arm unintentionally moves to an undesired position. This can cause damage, in the worst case even injuries.

A toggle lever device is for example from the EP 2 548 700 A1 known.

A tensioning device, which is formed according to the features of the preamble of claim 1 is known from DE 298 17 335 U1 known. It has a housing and a pivotally driven shaft which is mounted in the housing. This wave can be achieved by supplying pressure medium pressure, z. B. by compressed air to a cylinder of the clamping device or under supply of correspondingly manually applied force via a hand lever back and forth to be moved between an open position and a closed position of a clamping arm of the clamping device. The shaft is mounted in the housing and led out of this on the opposite sides of the housing. The ends of the shaft are formed as form-fitting parts, which have a square cross-section. The clamping arm arranged outside the housing has two legs which receive clamping jaws in the region of their ends. As a result, a clamping, rotationally positive connection of the arrangement of clamping arm and jaws with the shaft in the region of the shaft ends between the legs and the jaws is generated. The tensioning device has a first locking means, which is mounted in one of the clamping jaws and is pivotable together with the shaft, furthermore a second locking means which is arranged in the pivoting path of the first locking means and mounted in the housing. The two locking means act releasably together in a defined pivot position of the clamping arm. The first locking means has a fixedly connected to the jaws locking segment and a locking pin connected thereto. The locking bolt can be arranged in relation to the locking segment in several different angular positions with respect to the pivot axis of the clamping arm, z. B. at an opening angle of the clamping arm of 45 ° starting every 15 °, to 135 °. Corresponding this selectable position of the locking bolt, the locking segment is provided with blind holes. In this way, depending on the present operating conditions, even in place, ie during operation, the locking bolt with the respective desired pitch angle measure on the locking segment are firmly connected. The connection is made for example by screwing. The jaws serving to mount the first locking means thus has a receptacle within the blind bore for the first locking means and means for fixing the first locking means with respect to the receptacle, these means being designed as screwing-in means. Consequently, in this clamping device, the locking bolt can only be positioned at certain angular degrees. The second locking means has a mounted in the housing, specifically in a separate part, which is connected to the housing, mounted U-shaped spring. When transferring the clamping arm in the defined pivot position of the locking pin contacted the U-shaped spring in the region of the free ends of the two spring legs and spreads the spring slightly to be retracted completely in the defined position of the clamping arm in the recess defined by the spring, said the free ends of the spring legs are thus spring-back pivoting of the clamping arm from this defined pivot position only by applying an increased, acting on the shaft of the tensioning device torque is possible. However, this is so large that the clamping arm can not move unintentionally from this defined pivot position, which corresponds to the previously set open position of the clamping arm.

Object of the present invention is to develop a clamping device according to the preamble of claim 1 so that at any opening angles of the clamping arm secure locking of the clamping arm is guaranteed.

The object is achieved in that the recording is the freely pivotable receiving the first locking means and the first locking means in any angular position, based on the pivot axis of the shaft, can be adjusted so that the angular position can be adjusted continuously.

The storage of the first locking means serving jaws is thus provided with a receptacle. This recording is intended to be the first Pivotally receive locking means. If the means provided for fixing the first locking means with respect to the receptacle are not effective, the first locking means can be set in any angular position with respect to the pivot axis of the shaft. This angular position can thus be adjusted continuously. If the desired angle is set, the means for fixing the first locking means are brought into their operative position, whereby a firm connection between the receptacle and the first locking means is brought about.

The defined pivoting position of the tensioning arm is, in particular, the infinitely adjusted angle in an angle range from 0 to 135 °.

The inventive design of the clamping device makes it possible to retrofit existing clamping devices with the lock for the clamping arm. For this purpose, it is only necessary to dismantle a conventional jaws, as it is provided at the other end of the shaft, which is thus not the lock from the clamping arm and instead of this usual jaw to use the modified jaws, which is provided with the recording. Is the arrangement of clamping arm, the usual jaws on one side of the housing and the receiving jaws on the other side of the housing with the clamping arm fixed, is on the jaws, which has the recording, in the recording area, the first locking means mounted, aligned in the desired opening angle position and fixed by means of fixing the first locking means with respect to the receptacle. It is then only necessary to connect the second locking means with the housing, in particular screw this into a threaded bore provided in the housing.

According to a particular embodiment of the invention it is provided that the first locking means comprises a lever and a jaws, for clamping, rotationally fixed connection of the arrangement of lever and jaws of the first locking means with that jaws in which the first locking means is mounted.

This configuration allows a bearing of the first locking means in the immediate vicinity of the pivot axis of the clamping arm, with a sufficiently long lever arm, thus sufficiently large distance of the contact region of the two locking means of the pivot axis of the clamping arm. Apart from this, this design allows a simple attachment and rotationally fixed connection of the first locking means on the receiving means of the first locking means serving jaws.

Preferably, the first locking means in the region of its end facing away from the shaft to a locking device which can be brought into operative connection with the second locking means. The effective range of the two locking means is thus in the region of the first locking means, which faces away from the shaft.

In a structurally particularly simple way, the interaction of the two locking means can accomplish when the first locking means on the second locking means facing side has a recess which is bounded laterally by rollers. In this case, the second locking means, when pivoting the first locking means in its defined pivot position, contacts the rollers and, when the defined pivot position is reached, the second locking means is retracted into the recess of the first locking means. In the defined pivot position of the clamping arm, the two locking means act releasably together. Thus, the lock is only canceled when either manually, in particular via a lever, or pneumatically an increased force is introduced into the shaft, which causes the two locking means move apart. Especially when installed over-head clamping device, it is therefore z. B. at a pressure drop or when heavy loads are connected to the clamping arm, not to the fact that the clamping arm unintentionally from the defined pivoting position in moved an unwanted situation. As a result, damage, in the worst case even injuries effectively avoided.

A particularly simple and effective design of the clamping device under the aspect of the releasable interaction of the two locking means results when two rotatably mounted shafts laterally delimit the recess. By this rotatable mounting also low friction losses occur in a relative movement of the two locking means when they interact. The bearing axes of the rollers are preferably arranged parallel to the pivot axis of the shaft. This can be achieved by a simple kinematic movement that the two locking means can be brought into operative position or out of operative position.

In a structurally particularly simple manner, the stepless adjustability of the first locking means with respect to the shaft can be achieved if the receptacle for the first locking means is designed with respect to the pivot axis of the shaft rotationally symmetrical body with profiled trained contact area to the first locking means.

Against the background of this specific design, it is considered particularly advantageous if the clamping jaw for receiving the first locking means by the rotationally symmetrical body, a frontally connected thereto plate and a jaw part is formed, wherein the jaw part has a recess for positive connection with the shaft , Such a designed clamping jaws can be particularly simple form of a rotary part, from which then only the jaw part with the recess must be worked out, in particular by milling.

The first locking means is in particular designed such that its clamping jaws is designed as a first half of a connecting clip and the lever of the first locking means in its this jaws facing region is designed such that it performs the function of the second half of the connecting clip having. It is further provided that the clamping jaw of the first locking means is pivotally connected in the region of one end to the lever and is releasably connected in the region of the other end by means of a screw connection to the lever. This design makes it possible, when the connection clamp is open, to easily arrange it on the receptacle for the first locking means, in particular on the rotationally symmetrical body, and by closing the connecting clip and clamping the two clamp halves, the first locking means and the receptacle for the first locking means or the rotationally symmetrical body to clamp against rotation. Before this happens, the first locking means is aligned in the desired defined pivot position of the clamping arm.

To bring about the positive connection in the region of the shaft ends, the shaft is provided there with a polygonal cross-section. It is preferably a quadrangular, in particular square cross-section. In this aspect, the arrangement of clamping arm and jaws has a complementary opening cross-section for receiving the respective shaft end. Thus, if the shaft end has a square cross-section, then the arrangement of clamping arm and associated jaws forms a square opening cross-section for receiving the square cross-section having shaft end.

The second locking means is preferably designed such that it has at least one helical spring whose axis is arranged parallel to the pivot axis of the shaft. By this design and arrangement a structurally simple design of the second locking means is possible with a simple interaction of the two locking means. It is considered to be particularly advantageous if the second locking means has a bearing pin connected to the housing, wherein the axis of the bearing pin is arranged parallel to the pivot axis of the shaft and the at least one coil spring is fixed in the sense of an axial strain. The bearing pin passes through the at least one coil spring and allows deformation of at least a coil spring upon action of the first locking means, in particular a deformation of the at least one helical spring with respect to the axis of the helical spring radially inwardly directed component.

Preferably, two coil springs are screwed into each other. When using two rollers, the distance between them is smaller than the spring diameter. The use of two helical springs screwed together has the advantage that the contact area between the rollers and the spring arrangement increases. The at least one helical spring is in particular guided only at both ends, so that a deformation of the elastic element formed from the at least one helical spring is ensured without further ado.

The rollers contact the pivoting of the first locking means in its defined pivot position, the at least one coil spring and deform them radially. In the defined pivot position, the rollers engage behind the at least one coil spring. In addition, a movement of the at least one coil spring over the defined pivoting position by a stop which is formed in the lever or by this, can be prevented. In the defined pivot position is thus at least one coil spring on the lever or the stop formed in the lever.

The invention and its developments thus proposes a clamping device, with a lock for the clamping arm in all possible mounting positions and opening angles, to prevent the clamping arm moves independently in the unwanted direction. This lock can be arranged and adjusted on site without disassembly on one or the other side of the clamping device. The lever of the first locking means is automatically positioned with respect to the second locking means and remains centered, even while taking the defined pivot position or opening angle adjustment.

It is a continuous adjustment of the opening angle of the first locking means, in particular the lever possible, without disassembly of the clamping arm, d. H. The clamping arm does not have to be exchanged for another or removed. It is only the conventional jaws against the jaws, which serves to support the first locking means to replace.

Further features of the invention are illustrated in the subclaims, the description of the figures and the figures themselves, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

Figur 1

eine räumliche Darstellung der erfindungsgemäßen Spannvorrichtung, veranschaulicht in der Spannposition eines Spannarmes der Spannvorrichtung,

Figur 2

die Spannvorrichtung gemäß Fig. 1, veranschaulicht in der Öffnungsstellung der Spannvorrichtung bei in Wirkstellung befindlicher externer Arretierung einer den Spannarm aufnehmenden Welle der Spannvorrichtung,

Figur 3

die Spannvorrichtung für den Funktionszustand gemäß Fig. 1, veranschaulicht für das der Welle zugewandte Ende der Spannvorrichtung, in Achsrichtung der Welle gesehen, wobei zusätzlich mehrere alternative Stellungen eines ersten Arretiermittels veranschaulicht sind, die mit anderen, größeren Öffnungswinkeln des Spannarms korrespondieren,

Figur 4

ein Detail der Spannvorrichtung in deren Öffnungsstellung (gemäß Fig. 2), betreffend den Kontaktbereich von erstem Arretiermittel und einem zweiten Arretiermittel, in Längsachse der Welle gesehen,

Figur 5

einen Schnitt gemäß der Linie V-V in Fig. 4,

Figur 6

die Spannvorrichtung in einer räumlichen Darstellung, veranschaulicht für das der Welle zugeordnete Ende der Spannvorrichtung, wobei für die Arretierung des Spannarms relevante Bauteile der Spannvorrichtung in einer Explosionsdarstellung veranschaulicht sind,

Figur 7

eine räumliche Ansicht des zweiten Arretiermittels, veranschaulicht in einer Explosionsdarstellung,

Figur 8

das in Fig. 7 veranschaulichte zweite Arretiermittel in zusammengebautem Zustand,

Figur 9

eine räumliche Ansicht des Klemmbackens der der Aufnahme des ersten Arretiermittels dient,

Figur 10

eine räumliche Ansicht des ersten Arretiermittels,

Figur 11

eine Ansicht der Verbindung von erstem Arretiermittel und Klemmbacken zur Aufnahme dieses Arretiermittels, gesehen in Achsrichtung der Welle,

Figur 12

ein Schild gemäß der Linie XII-XII in Fig. 11.

In the figures, the invention is illustrated by means of a preferred embodiment, without being limited thereto. It shows:

FIG. 1

a spatial representation of the clamping device according to the invention, illustrated in the clamping position of a clamping arm of the clamping device,

FIG. 2

the tensioning device according to Fig. 1 , Illustrated in the open position of the tensioning device with befindlicher in active position external locking of the tensioning arm receiving shaft of the clamping device,

FIG. 3

the tensioning device for the functional state according to Fig. 1 , Illustrated for the shaft facing the end of the clamping device, seen in the axial direction of the shaft, wherein in addition a plurality of alternative positions of a first locking means are illustrated, which correspond to other, larger opening angles of the clamping arm,

FIG. 4

a detail of the clamping device in its open position (according to Fig. 2 ), concerning the contact area of the first locking means and a second locking means, seen in the longitudinal axis of the shaft,

FIG. 5

a section along the line VV in Fig. 4 .

FIG. 6

the tensioning device in a three-dimensional representation, illustrated for the end of the tensioning device associated with the shaft, wherein components of the tensioning device that are relevant for the locking of the tensioning arm are illustrated in an exploded view,

FIG. 7

a spatial view of the second locking means, illustrated in an exploded view,

FIG. 8

this in Fig. 7 illustrated second locking means in assembled condition,

FIG. 9

a spatial view of the jaw of the recording of the first locking means,

FIG. 10

a spatial view of the first locking means,

FIG. 11

a view of the connection of the first locking means and jaws for receiving this locking means, seen in the axial direction of the shaft,

FIG. 12

a sign according to the line XII-XII in Fig. 11 ,

Illustrated is a tensioning device 1, which is used in particular in the bodywork of the automotive industry. This tensioning device is regarding its operating principle in a known manner as toggle lever clamping device trained, as for example in the EP 2 548 700 A1 is described.

The tensioning device has a two-sided pneumatically actuated piston for pivoting a shaft 3 guided out of a housing 2 of the tensioning device 1 in opposite directions, a tensioning arm 4 being connected in a rotationally fixed manner to the shaft 3. The piston acts on this shaft 3 via a toggle lever. The stroke of the piston is variable in length, changeable, for example, by changing the length of a piston rod between the piston and toggle, so that at a defined closing angle, thus invariable closing position of the clamping arm 4 whose opening angle, thus the open position can be changed. This can be seen in particular against the background that structural conditions in the region of the tensioning device 1 only allow a certain opening angle of the tensioning arm 4.

The shaft 3, which is axially fixed in the housing 2, but pivotally mounted, is led out on opposite sides of the housing 2 from this. The ends of the shaft, wherein only one shaft end 5 is visible in the figures, are formed as form-fitting parts. Specifically, the respective shaft end has a square cross-section, with bevelled corners. The arranged outside the housing 2 clamping arm 4 has a U-shaped portion 6 with two legs 7 and a connecting web 8, also connected to the web 8, away from the portion 6 approach 9, which is provided with various holes 13. In this area of the projection 9, a tool or the like with the clamping arm 4 is connectable, thus a device that has quite a relatively large weight.

The respective leg 7 has, in the region of the end facing away from the web 8, a rectangular recess, in the region of which the leg 7 cooperates in a form-fitting manner with two adjacent sides of the associated shaft end 5. For the rotationally fixed connection of the clamping arm 4 in the region of both legs 7 with the two projecting from the housing 2 shaft ends jaws are provided which have a rectangular recess corresponding to the recess of the leg 7, so that the jaws in the region of these recesses in operative connection with the other two sides of the respective shaft end can be brought. The respective jaws has in the region of opposite ends holes, the screws pass, which are screwed into threaded holes, both sides of the shaft end in the associated legs 7 of the clamping arm 4. In this way, a rotationally fixed connection between the clamping arm 4 and the two protruding from the housing 2 shaft ends is guaranteed.

The clamping device 1 described so far is known from the prior art. This clamping device 1 is provided with a special lock for locking the clamping arm 4 in a respectively desired, predetermined opening position of the clamping arm 4. Here, the lock ensures that the clamping arm 4 can not pivot unintentionally out of the locked, open position.

The clamping device 1 is designed such that either on one side of the housing 2, this locking can be attached, or on the side facing away from this side of the housing 2 side of the housing 2. Based on the embodiment shown is in the region of one side of the housing. 2 a first locking means 11 and a second locking means 12 are positioned.

In order to be able to receive the first locking means 11, the clamping jaws which are usually used on one or the other side of the housing 2 are modified, ie the usual clamping jaw is dismounted from the associated leg 7 of the tensioning arm 4 and the modified clamping jaw 14 is instead removed therefrom Leg 7 screwed. The design of this jaw 14 results in particular from the illustration of FIGS. 6 and 9 ,

The clamping jaw 14 is formed by a rotationally symmetrical body 15, a frontally connected thereto plate 16 and a jaw part 17. The jaw part 17 has, according to the training of the commonly used clamping jaw, a rectangular recess 18 for positive connection with the two free sides of the shaft end 5, thus those sides on which the leg 7 is not applied. The plate 16 is the connecting part of the jaw part 17 and body 15. The jaw part 17 is provided in the usual manner, thus as the clamping jaws commonly used with two holes 19 for inserting screws into the threaded holes of this jaw 14 facing leg 7 of the clamping arm 4 are screwed to accomplish the rotationally fixed connection of the arrangement of clamping arm 4 and jaws 14 with this jaw 14 associated shaft end 5. The body 15 represents a receptacle for the first locking means 11.

After the conventional clamping jaw has been replaced by the modified clamping jaw 14 in the region of the shaft end 5, the first locking means 11 with the clamping jaw 14 is in any desired angular position with respect to the pivot axis of the shaft 3 and the identical pivot axis of the rotationally symmetrical body 15 in the region the rotationally symmetrical body 15 connected. Here, the rotationally symmetrical body is radially outwardly provided over its circumference with a profile 20 which is trapezoidal in cross-section.

The first locking means 11 has a lever 21 and a clamping jaw 22. This is mounted in the region of one end in an axis 23 which passes through the lever 21. In the region of the end facing away from the axis 23 of the jaws 22 is connected by means of a screw 24 with the lever 21, which is for this purpose in a threaded bore of the lever 21 can be screwed. The jaw 22 is formed as a first half of a connection clamp and the Lever 21 in its the jaws 22 facing region designed such that it has the function of the second half of the connection threshold. In the area of the screw 24, the clamping jaw 22 is detachably connected to the lever 21. In the contact region of rotationally symmetrical body 15 with the lever 21 and the jaws 22, the lever 21 and the jaws 22 have a corresponding profile 20 of the body 15 designed, negative profile, so that the first locking means 11 can be rotatably connected to the jaws 14 , If the first locking means 11 loosely attached to the jaws 14, due to the interaction of rotationally symmetrical body 15 and the arrangement of lever 21 and jaws 22 of the lever 21 can be arranged in any angular position to the jaws 14. Only then, when the desired angular position is set, the screw 24 is tightened and thus the rotationally fixed connection between the first locking means 11 and jaws 14, thus first locking means 11 and shaft 3 and consequently the tensioning arm 4 accomplished. - The jaw 22 and the screw 24 thus constitute means for fixing the first locking means 11 with respect to the receptacle, which is formed by the body 15, is.

As in particular the representation of the Fig. 6 can be seen, the first locking means 11 in the region of its end facing away from the shaft 3, a locking device 25. This can be brought into operative connection with the second locking means 12. The formation of the first locking means 11 in the region of the locking device 25 is in particular in the Figures 10 and 11 illustrated. There, it is shown that the lever 21 on that side, which faces the second locking means 12, has a U-shaped recess 26 which is bounded laterally by two rollers 27. These rollers 27 are rotatably mounted in axes 28 which are arranged parallel to the axis of the body 15. The rollers 27 are designed as cylindrical rollers and have identical diameter. As a result, an effective radius 30 is given by the average distance of the axes 28 of the rollers 27 from the pivot axis 29 of the body 15 and the shaft 3.

The second locking means 12 lying in the pivoting path of the first locking means 1 is arranged on the same side of the housing 2 as the first locking means 11. The second locking means 12 has a bearing pin 31 connected to the housing 2. The axis of the bearing pin 31 is in this case on a pitch circle with the effective radius 30 about the pivot axis 29. The axis of the bearing pin 31 is arranged parallel to the pivot axis of the shaft 3. The bearing pin 31 passes through two coil springs 32, 33, which are arranged screwed into one another. This spring assembly formed by the two coil springs 32 and 33 is supported on the bearing pin 31 and is braced by means of a screw 34 screwed into the bearing pin 31. The coil springs 32, 33 are thus fixed axially. The outer diameter of the axially fixed coil springs 32, 33 is slightly smaller than the distance between the two rollers 27 of the first locking means 11. The lever 21 is axially positioned with respect to the rollers 21 such that upon pivoting of the first locking means 11 in the direction of the second locking means 12 the Rollers 27, the coil springs 32, 33 contact. When applying an increased force or an increased torque acting on the lever 21, the coil springs 32, 33 deform slightly radially under the action of the rollers 27, and the coil springs 32, 33 pass through the rollers 27, thus reaching the area the U-shaped recess 26 of the lever 21, whereby the coil springs 32, 33 are contacted in the end position of the rollers 27 and rest in the bottom portion 35 of the recess 26, as shown in particular the representation of FIGS. 4 and 5 can be seen. From this locked position, the first locking means 11, thus the lever 21 can only be moved out when acting on the lever 21, an increased force or an increased torque or which is greater than a moment, if necessary via the clamping arm 4 ., Taking into account a connected to the clamping arm 4 load on the shaft 3 and thus the first locking means 11 acts.

Can move the first locking means 1 in the locked position and from this pneumatically by acting on the cylinder or in particular manually. Under this latter aspect is the toggle of the tensioner 1 and thus the shaft 3 of the clamping device 1 also externally by means of a hand lever 36 pivotally. For this purpose, a shaft 37 is arranged on both sides of the housing 2, parallel to the pivot axis of the shaft 3, with the shaft end of the shaft 37, which protrudes on the first locking means 11 side facing away from the housing 2, the hand lever 36 is rotatably connected. By actuating the hand lever 36 and thus rotating the shaft 37, the lever 21 of the first locking means 11 can pivot.

The embodiment of the clamping device 1 makes it possible to realize a lock for the clamping arm 4 for all possible mounting positions of the clamping device 1 and opening angle of the clamping device 1. Illustrated are in the FIG. 3 four different opening angle settings of the lever 21, which correspond to different opening angles of the clamping arm 4. These opening angles in particular move between 0 ° and 135 °, as illustrated by the scaling on one side of the housing 2. Because of the particular configuration of the first locking means 11, the opening angle are infinitely adjustable. This lock can be arranged without disassembly, on one or the other side of the housing 2.

LIST OF REFERENCE NUMBERS

1

jig

2

casing

3

wave

4

clamping arm

5

shaft end

6

section

7

leg

8th

web

9

approach

10

recess

11

first locking means

12

second locking means

13

drilling

14

jaws

15

body

16

plate

17

Jaw part

18

recess

19

drilling

20

profile

21

lever

22

jaws

23

axis

24

screw

25

locking

26

recess

27

role

28

axis

29

swivel axis

30

effective radius

31

bearing bolt

32

coil spring

33

coil spring

34

screw

35

floor area

36

hand lever

37

wave

Claims (15)

1. Clamping device (1), in particular for use in bodywork manufacturing in the motor vehicle industry, with a housing (2), a pivotably driveable shaft (3) which is mounted in the housing (2) and is led out of the latter on averted sides of the housing (2), wherein the ends (5) of the shaft (3) are designed as form-fitting parts, and with a clamping arm (4) which is arranged outside the housing (2) and has two limbs (7) which, in the region of the ends thereof, accommodate clamping jaws (14), for the clamping, rotationally form-fitting connection of the arrangement of clamping arm (4) and clamping jaw (14) to the shaft (3) in the region of the shaft ends (5) between the limbs (7) and the clamping jaws (14), and with a first locking means (11) which is mounted in one of the clamping jaws (14) and is pivotable together with the shaft (3), and with a second locking means (12) which is arranged in the pivoting path of the first locking means (11) and is mounted in the housing (2), wherein the two locking means (11, 12) interact releasably in a defined pivoted position of the clamping arm (4), wherein the clamping jaw (14) serving for mounting the first locking means (11) has a receptacle (15) for the first locking means (11) and means (22, 24) for fixing the first locking means (11) with respect to the receptacle (15), characterized in that the receptacle (15) serves for the freely pivotable accommodation of the first locking means (11), wherein the first locking means (11) can be set in any angular position with respect to the pivot axis of the shaft (3), and therefore the angular position can be adjusted in an infinitely variable manner.
2. Clamping device according to Claim 1, characterized in that the first locking means (11) has a lever (21) and a clamping jaw (22) for the clamping, rotationally fixed connection of the arrangement of lever (21) and clamping jaw (22) of the first locking means (11) to the clamping jaw (14) in which the first locking means (11) is mounted.
3. Clamping device according to Claim 1 or 2, characterized in that the first locking means (11), in the region of that end thereof which is averted from the shaft (3), has a locking device (25) which can be brought into operative connection with the second locking means (12).
4. Clamping device according to Claim 3, characterized in that the locking device (25) is arranged in the region of that end of the lever (21) which is averted from the shaft (3).
5. Clamping device according to one of Claims 1 to 4, characterized in that the first locking means (11), on the side facing the second locking means (12), has a recess (26) which is bounded laterally by rollers (27), wherein the second locking means (12), when a first locking means (11) pivots into the defined pivoted position thereof, makes contact with the rollers (27) and, in the defined pivoted position, is driven into the recess (26).
6. Clamping device according to Claim 5, characterized in that two rotatably mounted rollers (27) laterally bound the recess (26).
7. Clamping device according to Claim 5 or 6, characterized in that the bearing axes of the rollers (27) are arranged parallel to the pivot axis of the shaft (3).
8. Clamping device according to one of Claims 1 to 7, characterized in that the receptacle (15) for the first locking means (11) is designed as a body which is rotationally symmetrical with respect to the pivot axis (29) of the shaft (3) and has a contact region (20) of profiled design with respect to the first locking means (11).
9. Clamping device according to Claim 8, characterized in that the clamping jaw (14) for accommodating the first locking means (11) is formed by the rotationally symmetrical body (15), a plate (16) connected to the latter on the end side and a clamping jaw part (17), wherein the clamping jaw part (17) has a recess (18) for the form-fitting connection to the shaft (3).
10. Clamping device according to one of Claims 2 to 9, characterized in that the clamping jaw (22) of the first locking means (11) is designed as a first half of a connecting clip, and the lever (21) of the first locking means (11), in the region of said lever which faces the clamping jaw (22) of the first locking means (11), is designed in such a manner that it has the function of the second half of the connecting clip, wherein the clamping jaw (22) of the first locking means (11) is connected in the region of one end pivotably to the lever (21) and is connected in the region of the other end to the lever (21) by means of a screw (24).
11. Clamping device according to one of Claims 1 to 10, characterized in that the shaft (3) has a polygonal cross section, preferably a tetragonal cross section, in particular a square cross section, in the region of the shaft ends (5), and the arrangement of clamping arm (4) and clamping jaw (14) has a complementary opening cross section for receiving the respective shaft end (5).
12. Clamping device according to one of Claims 1 to 11, characterized in that the second locking means (12) has at least one helical spring (32, 33), the axis of which is arranged parallel to the pivot axis (29) of the shaft (3).
13. Clamping device according to Claim 12, characterized in that the second locking means (12) has a bearing bolt (31) which is connected to the housing (2), wherein the axis of the bearing bolt (31) is arranged parallel to the pivot axis (29) of the shaft (3), and the at least one helical spring (32, 33) is fixed axially in opposed directions.
14. Clamping device according to Claim 12 or 13, characterized in that two helical springs (32, 33) are arranged screwed one inside the other.
15. Clamping device according to one of Claims 12 to 14, characterized in that, when the first locking means (11) is pivoted into the defined pivoted position thereof, the rollers (27) make contact with and radially deform the at least one helical spring (32, 33) and, in the defined pivoted position, reach behind the at least one helical spring (32, 33) and bear against the latter.

Images