DE8400654U1 - DETACHABLE PTO CLUTCH DEVICE - Google Patents

Description

Hans Bühler & Co., machine factory, owner Kurt Giesler Foundation, Friedrich-List-Straße 3, 7314 Wernau

Separable PTO clutch device

The innovation is based on a separable PTO clutch device with a coupling pin carrying an external toothing and a coupling sleeve, in their coaxial bore with internal toothing of the coupling pin while producing a non-rotatable positive connection is insertable, and with a mounted in the coupling sleeve, radially movable releasable locking device, which with the coupling pin pushed into the coupling sleeve a locking member provided on the coupling pin cooperates in a form-fitting manner and through which the coupling pin is secured against axial displacement in the coupling sleeve.

With such separable PTO clutch devices known from practice, the radially tewegliche releasable locking device of the coupling sleeve by a number of arranged distributed in the circumferential direction Balls formed that sit in corresponding radial bores of the coupling sleeve and through a wedge gear can be advanced radially inward. In the advanced state, the balls grip into a corresponding in the circumferential direction circumferential groove of the coupling pin, whereby in the axial direction with regard to the coupling sleeve and the coupling pin results in a positive connection.

The guide bores, in which the balls sit, must not, however, be cylindrical bores be designed, because otherwise the balls fall out radially inward from their guide bores can. There are therefore projections at the radially inner end of the guide bores, Äby which the balls are retained in their guide bores.

However, this has the consequence that the ball only with a relatively small part of its guide opening can look out so that the locking surface rests on the wall of the groove of the coupling pin Spherical surface with a relatively acute angle Eur longitudinal axis of the coupling sleeve runs. In axial Forces acting in the direction between the coupling pin and the coupling sleeve therefore cause a corresponding effect high surface pressure between the balls and the groove wall of the coupling pin, which is why the Arrangement only relatively small axial forces can transfer.

The task of the innovation is therefore to create a separable PTO clutch device that can be operated easily for the purpose of separating and with the high axial forces, preferably in both directions, are to be transferred.

To solve this problem is the innovation according to Separable PTO clutch device characterized by the features of the main claim.

The use of the hook-bearing lever has the advantage that the contact surface to the extension the Coupling pin arranged running essentially at right angles to the longitudinal axis of the coupling sleeve can be, so that the normal force occurring on the contact surface equal to that of the separable Axial force guided by the PTO shaft coupling device and explosive forces acting on the lever, which could lead to the hook disengaging, must be avoided. Also is the material load correspondingly reduced in the area of the contact surface of the hook and the extension.

A very space-saving arrangement is obtained if the lever is in a radially outwardly open Longitudinal groove of the coupling sleeve is arranged, so that also accident-prone, protruding beyond the outer circumference Projections are avoided.

A very simple arrangement is achieved when the lever with its hook over that of the insertion movement of the coupling pin facing the end face protrudes, which at the same time the stop forms for the continuation.

Accidental unlocking is avoided when the lever is in the direction of the engaged position the extension of the coupling pin is spring-loaded. For this purpose, the lever can be designed with two arms, whereby between the coupling sleeve and the arm of the lever opposite the hook there is a Bias generating compression spring is arranged.

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A more even distribution of force is achieved if there are essentially several on the coupling sleeve levers carrying the same hook are mounted equidistantly.

If the internal teeth of the coupling sleeve and the external teeth of the coupling pin are different Angular positions can be coupled to each other, is advantageously the extension of the Coupling pin from one on the coupling pin fastened disc formed so that the lock in every angular position between the coupling pin and the coupling sleeve is possible.

If, as a result of high speeds, there is a risk that the hooks from the extension due to the centrifugal force the coupling pin can come free, is to eliminate this danger on the coupling socket an axially displaceable and latchable locking ring is arranged through which the lever '; passes and with which the lever at least in its direction towards the hook-side end of the lever advanced position is engaged with the lever.

Another way to fix the locking ring is to attach to the front end of the Coupling sleeve to provide a stop for the locking ring in the direction of this stop is biased.

The release of the separable PTO clutch device is simplified when on the coupling sleeve an actuating device for the lever carrying the hook is mounted. This actuator can be formed by the locking ring,

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while the hook with respect to the pivot axis
opposite arms of the levers carry a radially outward sloping surface, which can be brought into engagement with the locking ring with simultaneous pivoting of the levers.

If the locking ring is designed to be longitudinally displaceable on the coupling sleeve, the inclined surfaces converge in the direction of the front end of the
Coupling sleeve.

In the drawing, exemplary embodiments of the subject of the innovation are shown in an axial section. Show it:

Fig. 1 ei ".e separable PTO clutch device in an axial section and

2 shows a separable PTO clutch device with actuating device for the Hakön,
also in an axial section.

A separable power take-off clutch device 1 shown in FIG. 1 contains a coupling pin 3 provided with an external toothing 2 as well as a
substantially cylindrical coupling sleeve 4 with
its two end faces 5 and 6, which contains a continuous bore 7 coaxial with the coupling sleeve 4 with internal teeth 8, in which, as illustrated, the coupling pin 3 with its external teeth 2 can be inserted to form a non-rotatable connection.

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The coupling sleeve 4 has two longitudinal grooves that are open in the radial direction and diametrically opposite one another 9 and 11, which are also the coupling pin 3 push through the adjacent face 6. There is a two-armed lever in each of the two longitudinal grooves 12, which is pivotably mounted on an associated axis 13 or 14, which is perpendicular to the longitudinal axis the coupling sleeve 4 runs. The axes 13 and 14 are formed by cylinder bolts that are shown in Corresponding bores of the coupling sleeve 4 are inserted through the side walls of the two grooves 9 and 11 and run parallel to the base of the two grooves 9 and 11.

Each of the two two-armed levers 12 carries one radially at its end protruding beyond the end face 6 inwardly facing hook 15 with one of the end face 6 opposite, essentially at right angles to the longitudinal axis of the coupling sleeve 4 extending stop surface 16. That relative to the hook 15 the axis 13 or 14 opposite end 17 of the lever 12 contains a radially inwardly opening Blind hole 18 which is aligned with a blind hole 19 provided in the bottom of the grooves 9 and 11 and serves with this jointly to accommodate a compression spring 21, through which the lever 12 with his Hook 15 is biased radially inward.

The coupling pin 3 carries a circular cylindrical disk in connection with its external toothing 2 22, which is materially connected, for example by welding, to the coupling pin 3 and has two flat stop surfaces 23 and 24 parallel to one another. In the coupled state

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is the stop surface 23 on the also plan face 6 of the coupling sleeve 4, while the stop surface 24 is in engagement with the stop surfaces 16 of the hooks 15, the outer diameter the disc 22 is chosen such that the lever 12 with its radially inner Support surface 25 in the area of the hook 15 on the outer circumference of the disc 22, in such a way that in this position the stop surfaces 16 of the hooks 15 parallel to the stop surface 24 of the disc 22 run. The axial extent of the disk 22 is, moreover, slightly smaller than the distance from the end face 6 to the parallel and spaced-apart Af.iageflache 16 of the Hook 15.

For the purpose of easier coupling, the hooks 15 can be provided with inclined surfaces 26, starting from the associated contact surface 16, go radially outward, up to a diameter, which is larger than the outer diameter of the disk 22.

In order to prevent the hook 15 against the force of the compression springs, possibly due to the action of centrifugal force 21 migrate to the outside and release the contact surface 22, there is an axial on the coupling sleeve 4 Slidable ring 27 is provided, the inner diameter of which corresponds to the outer diameter of the coupling sleeve. On top of that, the radially outer one Rear side 28 of the lever 12 is designed so that it is in the area of the longitudinal grooves 9 and 11 when engaged Coupling pin can complement the course of the circumference interrupted in the area of the longitudinal grooves 9 and 11 the securing ring 27 can easily be positioned on the coupling sleeve 4 in the position shown in the figure

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ment advance in the direction of the face 6, in which he is between the face 6 and the Axes 13 and 14 are located.

In one in the inner circumferential surface of the locking ring 27 attached blind hole 29 is seated by a compression spring 31 biased ball 32 / die engages in a notch 33 provided in the rear side 28 of the lower lever 12 in the position shown.

In the case of the power take-off clutch device 1 described so far, the torque to be transmitted can either be introduced into the coupling sleeve 4, which for this purpose in a known manner on the output shaft a gearbox or a motor is attached, or the torque can also be introduced into the coupling pin 3, which then accordingly formed by a wave stunel of an output wave can be; the other component of the separable PTO clutch device 1 forms the output side. In the case of the illustrated embodiment, it is assumed that the torque is in the Coupling sleeve 4 is initiated, while the part of the coupling pin 3 protruding from the coupling sleeve 4 is materially connected to the input side a universal joint 34 is connected, the output side of which is a broken illustrated shaft 35 drives.

To explain how the PTO clutch device works 1 it is assumed that the coupling pin 3 is outside the coupling sleeve 4, which is flanged coaxially on the output shaft of a gearbox. To engage the clutch, first the locking ring 27 to over the axes 13 and 14 of the lever 12 in the direction of "the end face 5 withdrawn so that the levers 12 with their

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Hook 15 can freely pivot radially outward when the coupling pin 3 with its external teeth 2 ahead in the internal teeth 8 of the

< ^: 1 coaxial hole 7 is introduced and the disk

be 22 with its outer circumferential surface with the inclined

'f, surfaces 26 of the two levers 12 comes into engagement.

When you slide the two

f serrations 2 and 8 namely, which are largely free of play

■ are formed, the slides from the contact surface

23 and the outer peripheral surface of the disc 22 formed

dete edge along the inclined surfaces 26 and, depending

further the disk 22 approaches the end face 6,

The further the two levers 12 pivot about theirs

respective axis of rotation 13 or 14 with their hooks 15

to the outside against the biasing force of the compression springs 21 which act on the other end of the lever 12. In the extreme case, the two levers 12 here take the one indicated by dashed lines and 12 'in the figure Position.

As soon as the stop disk 22 with its stop surface 24 passes the stop surface 16 of the lever 12 has, snap the two hooks 15 due to the action of the compression springs 21 radially inward and reach behind the disk 22, which now rests with its stop surface 23 on the end face 6. The radial inward movement of the lever 12 is only stopped when the inner surfaces 25 of the two Lever 12 rest on the outer peripheral surface of the disc 22, whereby the lever 12 in the figure have taken up position drawn in solid lines, in which their rear side 28 of the outer circumference f pool of the coupling sleeve 4 follows. The locking ring 27 can now be directed towards the end face 4 are advanced until the ball 32 engages in the associated notch 33, with which the lever 12 are secured against the effects of centrifugal force.

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With the power take-off clutch device coupled in this way, both a torque via the toothings 2 and 8 which are positively engaged with one another and also a train or Compressive force. In the case of the pressure force, the force is transmitted via the one on top of the other Areas of the end face 6 and the contact surface 23 which are at right angles to the longitudinal axis of the coupling sleeve 4 run, while the tensile force from the attachment surface 24 and thus standing in a single reef Contact surfaces 16 of the hook 15 is transferred.

To release the separable PTO clutch device, the locking ring 27 is first turned back into Retracted towards the end face 5, namely to behind the two axes 13 and 14. In this Position of the locking ring 27, the rear ends 17 of the two levers 12 can counteract by hand the action of the springs 21 are compressed, causing the hooks 15 to pivot radially outward and release the disc 22, which is now pulled out of the coupling sleeve together with the coupling pin 3 can be.

The embodiment of the power take-off clutch device 1 illustrated in FIG. 2 is in principle constructed like the embodiment of FIG. 1, which is why parts that correspond to one another have the same Reference numerals are provided and are not described again. The differences are essentially there in an actuating device for the two-armed lever 12 in order to facilitate lifting of the hook 15 from the disk 22 to enable.

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Ct IM I. ι

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In the embodiment shown in Fig. 2, the two grooves 9 and 11 have a greater depth, measured in the radial direction than the height of the two levers 12, also measured in the radial direction, corresponds, so that the rear sides 28 of the two Hebei 11 opposite the outer peripheral surface of the coupling sleeve 4 jump back. In the resulting grooves, which are limited by the side walls of the grooves 9 and 11 are and the bottom of which forms the back 28 of the two levers 12, protrude two extensions 36 and 37, the protrude radially inward from the inner peripheral surface of the ring 27. The radial height of the two processes 36 and 37 is dimensioned so that they are with little play over the backs 28, around the lever 12 with the hooks when the locking ring 27 is advanced towards the end face 6 15 to hold in the radially inwardly folded position in which the hooks 15 the disc 24 of the Reach behind the coupling pin 3. An opening of the hooks 15 as a result of the action of centrifugal force is on prevented this way.

At the rear end of the lever 12, namely that one The end of the lever 12, in which the blind hole 18 is attached, goes in the engaged State axially parallel rear side 28 into an inclined surface 38, which is in a predetermined Removal behind the bolts 12 and 13 from the rear 28 rises. The distance between the pin 12 or 13 and the point at which the inclined surface 38 rises from the rear side 28, is greater than the axial extent of the two extensions 36 and 37, respectively, for proper actuation of the two levers 12 to be able to ensure.

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While in the embodiment of Fig. 1 for locking the locking ring, the locking ball 32 is provided, in the embodiment of FIG. 2, a helical spring serves the similar purpose 41, which at one end on a formed on the locking ring, radially outward protruding shoulder 42 and at the other end on one near the end face 5 on the coupling sleeve 4 pushed-on flange 4 3 is supported by means of a radially extending stud screw on the outer circumferential surface of the coupling sleeve 4 is secured. The sliding down of the locking ring 27 from the coupling sleeve is by a further shoulder 45 prevents the at the front end of the coupling sleeve 4, i.e. in the vicinity the end face 6 is arranged protruding radially outward.

To prevent dirt from getting into the separable PTO clutch device 1, extends between the flange 4 3 and the shoulder 42 a fastened at these points Bellows 46 which completely surrounds the helical spring 41.

As in the embodiment according to FIG. 1, the coupling pin 3 is inserted into the coupling sleeve 4 of the locking ring 27 against the biasing force of the helical spring 41 in the direction of the end face 5 withdrawn. As soon as this the extensions 36 and 37 on the pins 12 and have migrated back out and come into engagement with the inclined surface 38 of the two levers 12, the two levers 12 through the interaction of the inclined surface 38 with the extensions 36 and pivoted outwards in opposite directions, as shown in the figure with the levers 12 'shown in dash-dotted lines.

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The hooks 15 move radially outward, so far that the coupling pin 3 with the disk 22 attached to it can easily be inserted into the coupling sleeve 4 until the disk 22 rests against the end face 6. As soon as this position is reached, the locking ring 27 is released, which, due to the biasing force of the helical spring 41, leaps forward in the direction of the stop shoulder 45 To pivot the force of the helical springs 21 radially inward until the inner side 25 rests on the outer circumferential surface of the disk 22. At the same time, the hooks ″> 5 a 3 engage behind the disk 22 and prevent the coupling pin 3 from being pulled out of the bore 7 of the coupling sleeve 4. In the front axial position of the locking ring 7, as previously described, the levers 12 are in the with their Hook 15 securely held towards one another in the folded position.

To disconnect the PTO clutch device 1, only the locking ring 27 needs to be withdrawn to become, which then, when retracting further, as described above, the lever 12 again pivoted radially outward so that the hooks release the disk 22 of the coupling pin 3.

This form of the actuating device for the lever 12 is particularly advantageous when, deviating of the exemplary embodiment shown, more than two levers are mounted in the coupling sleeve 4 are to secure the disc 22 in the axial direction.

Claims (1)

Patent Attorneys Dr.-lng. R. Rüger Dipl.-Ing. H. P. Barthelt reins. Representative at the European Patent Office Webergasse 3 ■ Postfach 348 - 7300 Esslingen (Neckar) January 11, 1984 Gm 2 baeh Telephone Stuttgart (0711) 35 65 39 and 35 9619 Telex 7 256 610 smru Telegram patent protection Esslingenneckar Protection claims 1. Separable PTO clutch device with a a coupling pin carrying external teeth and a coupling sleeve in their coaxial bore with internal toothing of the coupling pin while producing a non-rotatable positive connection is insertable, and with a mounted in the coupling sleeve, radially movable detachable Locking device with a provided on the coupling pin locking member cooperates positively and through which the The coupling pin is secured against axial displacement in the coupling sleeve, characterized in that that the locking device of at least one at its end pointing radially inward Hook (15) carrying lever (12) is formed on a to the longitudinal axis of the coupling sleeve (4) perpendicular axis (13, 14) is pivotably mounted in the coupling sleeve sits, and that the locking member of an on the coupling pin (3) attached extension (22) is formed, which is engaged from behind by the hook (15) in the coupled state and against a stop (6) the coupling sleeve (4) is in contact. 2 - 2. PTO clutch device according to claim 1, characterized in that the lever (12) is in a radially outwardly open longitudinal groove (9, 11) the coupling sleeve (4) is arranged. 3. PTO clutch device according to claim 1, characterized in that the lever (12) with its hook (15) over that of the insertion movement of the coupling pin (3) facing face (6) protrudes, which forms the stop for the extension (22). 4. PTO clutch device according to claim 1, characterized in that the lever (12) in Spring-biased towards the position of engagement with the extension (22) of the coupling pin (3) is. 5. PTO clutch device according to claim 4, characterized in that the lever (12) has two arms is formed, and that between the coupling sleeve (4) and the opposite of the hook (15) Arm (17) of the lever (12) has a compression spring (21) generating the preload. 6. PTO clutch device according to claim 1, characterized in that on the coupling sleeve (4) several substantially identical hooks (15) supporting lever (12) arranged equidistantly are stored. 7. PTO clutch device according to claim 1, characterized in that the extension of the Coupling pin (3) formed by a disc (22) fastened on the coupling pin (3) is. 8. PTO clutch device according to claim 1, characterized / that on the coupling sleeve (4) an axially displaceable locking ring (27) is seated through which the lever (12) passes and the one with the lever (12) at least in its direction towards the end on the hook side of the lever (12) advanced position is engaged with the lever (12). 9. PTO clutch device according to claim 7, characterized / that the lever (12) in the coupled state with its inner side (25) adjacent to the hook (15) on the outer peripheral surface the disc (22) rests. 10. PTO clutch device according to claim 8, characterized in that the coupling sleeve (4) at its front end (6) a stop (45) for the in the direction of the stop (45) spring-loaded locking ring (27) carries. 11. PTO clutch device according to claim 1, characterized / that on the coupling sleeve (4) an actuating device (27) for the the hook (15) carrying lever (12) is mounted. 12. PTO clutch device according to claims 8 and 11, characterized in that the actuating device is formed by the locking ring (27) and that the arms (15) opposite the hook (15) with respect to the pivot axis (12, 13) the lever (12) carry a radially outward sloping surface (38) which is connected to the locking ring (27) can be brought into engagement with simultaneous pivoting of the levers (12). 13. PTO clutch device according to claim 12, characterized in that the inclined surfaces (38) in the direction of the front end (6) of the Converge coupling sleeve (4).