DE102009007957A1 - Clamping device for attachment of hollow shaft to solid shaft, has two-part clamping set comprising press ring, which exerts contraction force on hollow shaft, where pressure ring comprises axial longitudinal slot - Google Patents

Abstract

The device has a hollow shaft (3) or a hollow part comprising an inner cone for accommodating an adapter bushing (4), which comprises a corresponding outer cone and lies on a solid shaft (1). The adapter bushing comprises a piercing or non-piercing axial longitudinal slot. A two-part clamping set comprises a press ring (5), which exerts contraction force on the hollow shaft. The pressure ring comprises an axial longitudinal slot. A contraction disk and/or an activating disk (7) is axially provided within the hollow shaft.

Description

The The invention relates to a tensioning device.

From the DE 4230941 C2 is a clamping device for the connection of a hollow part with a solid shaft known. In this case, a backlash-free fitting of a solid shaft is shown in the hollow part, wherein two cone rings are pressed against each other. The force receiving part ( DE 4230941 C2 , Figure, reference number 19 ) holds the expansions and deformations of the hollow part brought about by this pressing against one another and thus reduces the elasticity of the hollow part.

The disadvantage here is that the number of parts is high and the manufacturing of the hollow part and in particular two cone-containing parts ( 27 . 32 ) is expensive. In addition, during assembly of the clamping set the solid shaft is pressed and the clamping force or shrinking force by moving the ring ( DE 4230941 C2 , Figure, reference number 33 ) and the inwardly directed flange ( DE 4230941 C2 , Figure, reference number 34 ) generated. The hollow part is axially displaced relative to the solid shaft. This is a significant disadvantage when the hollow part is used in a gear or other device and is held in its axial position by corresponding components, such as circlips. It then considerable forces are generated, which load the bearings and can lead to their failure.

In addition, the hollow part in the region of the force receiving part ( DE 4230941 C2 , Figure, reference number 19 ) has a step-shaped course of the inner diameter, which leads to a notch effect and therefore represents a possible predetermined breaking point.

Another disadvantage is that when removing or disassembling the screws ( DE 4230941 C2 , Figure, reference number 21 ) must be unscrewed and other screws with larger thread must be screwed. To keep such other screws in stock, so it is necessary during disassembly. This is expensive and expensive. In addition, when disassembling the clamping ring ( DE 4230941 C2 , Figure, reference number 33 ) are rotated to the other screws a counter surface on the force receiving part ( DE 4230941 C2 , Figure, reference number 19 ) to offer. This rotation is cumbersome, especially when corrosion or changes, such as gluing or the like, have taken place during the service life.

From the DE 100 60 037 C1 a tensioning device for mounting a hollow shaft on a solid shaft is known, in which a three-piece clamping set comprising a pressing ring and two by means of screws to each other movable, pressing on the pressing ring discs, is provided. However, the clamping set must be lubricated and is therefore expensive to operate.

Of the Invention is therefore based on the object, a clamping device in a cost effective manner and with little effort during installation further education.

According to the invention the task with the clamping device for fixing a hollow shaft or a hollow part on a solid shaft according to the specified in claim 1 Characteristics solved.

Essential features of the invention in the clamping device are that the clamping device for fixing a hollow shaft on a solid shaft,
wherein the hollow shaft or the hollow part has at least one of its ends an inner cone for receiving an adapter bush, which has a corresponding outer cone and rests on the solid shaft
and wherein the adapter bush has at least one axially running longitudinal slot, in particular continuous or non-continuous,
wherein a two-part clamping set, comprising at least one pressing ring, a shrinking force by means of the at least one press ring on the hollow shaft or the hollow part,
wherein the pressing ring has an axial longitudinal slot.

From The advantage here is that a play-free fitting executable is cost effective with few parts, of which many parts are inexpensive standard parts. Another The advantage here is that the hollow shaft has an inner cone, which is why no level gradients are executed need and notch effect diminished or even completely avoidable is. In addition, the inner cone makes the hollow shaft elastic and deformable enough to the geometric changes forward.

Especially should when mounting or tightening the tensioner no axial Displacement be generated. Furthermore, this is too exciting Hollow part also on roughly tolerated and / or different in the nominal diameter Vollwellen be reliably radially tensioned using a simple and inexpensive construction that works with as possible Many standard components and only a small installation length needed.

at an advantageous embodiment, the pressing ring and / or the Adapter bush each having an axial longitudinal slot, in particular a continuous, or a plurality of axially extending non-continuous and / or closed executed longitudinal axial slots on. The advantage here is that the deformation as possible evenly.

at In an advantageous embodiment, the pressing ring has an outer cone on, on which a tightening disc with appropriate inner cone arranged is, in particular to form a two-part weg- and / or force-controlled or block set clamping set. The advantage here is that a cost-effective clamping set is used, the low maintenance is and because of the conical execution in the end of the Hollow shaft also works precise and reliable. It In particular, even disadvantages of a three-piece clamping set preventable.

at In an advantageous embodiment, the pressing ring has a shoulder on to form a stop for the tightening disk, in particular at the axial end region of the press ring, in particular to form a two-piece path-controlled or block-pushed Clamping set. The advantage here is that by means of the stop and the manufactured geometry, the clamping force can be specified.

at In an advantageous embodiment, the hollow shaft has no slot on. The advantage here is that the hollow shaft cost is manufacturable.

at In an advantageous embodiment, the inner cone of the solid shaft worked by grinding. The advantage here is that special good fitting is possible.

at an advantageous embodiment comprises the shrink disk, in particular So the two-piece clamping set, at least one press ring, at least a support disk, at least one attraction disk and at least screws. The advantage here is that a standard shrink disc with Standard components is usable.

at an advantageous embodiment is the shrink disk the shrink disc and / or the attraction disc axially within the Hollow shaft. The advantage here is that the installation length extremely is low.

at an advantageous embodiment, the adapter socket has a so shaped collar on that when disassembling a pull by means of the tightening is executable. Is an advantage doing that, a very simple and quick disassembly without any special Aid is executable.

at In an advantageous embodiment, the tightening disc has screw holes for the screws when tightening the shrink disc, especially at Mounting, and further screw holes on for disassembly, loosening the shrink disk and / or peeling off at least the adapter socket. The advantage here is that no further screws necessary and turning the tightening disc during disassembly not necessary is.

at an advantageous embodiment, the solid shaft has a stop to limit the axial position of another adapter socket on. The advantage here is that in a simple way the solid shaft with two similar adapter sockets can be fitted.

In an advantageous embodiment, the further adapter socket 11 an outer cone and / or a collar. The advantage here is that the collar is usable for peeling and thus eliminates further parts or the use of other tools. In addition, the outer cone is an easy-to-manufacture means for creating the fit.

Another The advantage is that when removing the same screws are used as when tightening, so when mounting and dismounting the same screws can be used. In addition, no turning is necessary, because already positioned screw holes available are.

at another advantageous embodiment is at one end of Hollow shaft attachable to a support disk by means of a Tightening screw with the solid shaft detachably connectable. Thus, an axial centering and a bias of the hollow shaft advantageous to the solid shaft effected.

at a further advantageous embodiment, the cone angle of the Outside cone of the adapter socket chosen such that the adapter socket is not self-locking. In this embodiment causes the supporting disc with the tightening screw additionally a mechanical lock. Thus are also advantageous such cone angle usable, the even easier dismantling enable.

at a further advantageous embodiment, the cone angle of the Outside cone of the adapter socket chosen such that the adapter socket is self-locking. It is advantageous that other components for mechanical locking or the like are not necessary and therefore simple and inexpensive Versions are possible.

Further Advantages emerge from the subclaims.

1

FULL WAVE

3

HOLLOW SHAFT

4

JACK ADAPTER (Slotted)

5

PRESS RING THE SHRINK DISC (slotted)

7

attracting disk THE SHRINK DISC

8th

SCREW

11

TAPER RIFLE

The Invention will now be explained in more detail with reference to figures:

In the 1 is a clamping device according to the invention in and drawn sectional view.

In the housing, not shown, is a hollow shaft 3 stored by means of bearings. The housing is designed for sealing in each case with sealing ring flange and shaft seal.

On the hollow shaft 3 is a wheel can be arranged. Inside the hollow shaft 3 is a full wave 1 arranged. When mounting the solid shaft 1 in the hollow shaft 3 introduced.

The hollow shaft 3 is at its one axial end portion with an inner cone for receiving a socket 4 executed. At another point points the full wave 1 a stop on to the axial position of another adapter socket 11 to limit. The hollow shaft 3 has an inner cone for receiving the adapter socket 11 , The inner cone are each ground and geometrically designed so that adapter sockets 4 and 11 , each having an outer cone, between solid shaft 1 and hollow shaft 3 can be introduced.

With a two-piece clamping set, a press ring 5 , a tightening wheel 7 and screws 8th includes, the corresponding end of the hollow shaft 3 on the adapter socket 4 Shrunk so that the adapter socket 4 to the full wave 1 shrinks and pushes.

In order to be able to easily forward the occurring elastic deformations, has the adapter socket 4 an axial longitudinal slot. The adapter socket 4 thus contracts in the circumferential direction and presses radially on the solid shaft 1 , Thus, a backlash-free fitting is achieved frictionally.

The adapter socket 11 also has an axial slot. This ensures that the adapter bush already at low axial forces to the solid shaft 1 and the hollow shaft 3 invests.

When assembling, first the adapter socket 11 to the full wave 1 preassembled. The full wave 1 will then be together with the adapter socket 11 in the hollow shaft 3 introduced. Thus centered then the adapter socket 11 from a certain insertion depth and thus in particular the full wave 1 , The insertion is terminated in the axial direction upon contact of the adapter socket 11 with a trained as above stop collar on the shaft. Thereafter, the shrink disk by tightening the screws 8th a tightening disk 7 moved axially, with the attraction disc 7 on a press ring 5 is arranged with outer cone.

The pressing ring 5 sits with its inside, so its inner cylinder on the hollow shaft 3 and has an axial longitudinal slot. Thus presses with increasing tightening of the screws 8th the tightening disc 7 more and more on the press ring 5 , which thus contracts in the circumferential direction and on the hollow shaft 3 pressed. This area of the hollow shaft 3 is in particular because of the inner cone so sufficiently thin-walled and elastic that the deformation of this region of the hollow shaft 3 a shrinkage of the adapter socket 4 causes.

By means of the invention, different solid shafts with the same hollow shaft in the clamping device according to the invention can be used, since even with coarse tolerated nominal diameter of the solid shaft, the shrink disk, the hollow shaft via the adapter socket 4 connects with the full wave. The associated tolerance range depends at least on the elasticity of the hollow shaft 3 and the cone slope.

The invention thus offers significant advantages in that at different nominal diameters of the solid shaft 1 nevertheless the same hollow shaft 3 can be used. All other parts are reusable with the exception of the adapter sockets 4 . 11 ,

This is particularly advantageous for a manufacturer of devices with hollow part, whereby the manufacturer supplies customers, the full waves Use with nominal diameters according to metric or inch system. Because with the present invention is after replacement of the example metric adapter sockets against adapter sockets with one in inches dimensioned inside diameter complete compatibility and use given.

In addition, gross tolerated full waves 1 , So solid shafts with a nominal diameter from a large tolerance band, usable because of small axial displacements of the adapter sockets 4 . 11 and by the high elasticity along the circumference of the adapter sockets 4 . 11 due to the axial longitudinal slots such diameter variations are added.

Of the two-part clamping set, in particular the pressure ring comprised by this, does not have to be set precisely in its axial position become.

In the 1 It can be seen that the tightening disc on a stop of the press ring 5 is pushed, which is arranged at the axially outer end of the pressing ring. Thus, therefore, a defined shrinkage, ie in particular a defined tightening torque, which acts from the clamping set on the connection of the hollow shaft and solid shaft, reachable.

In further embodiments of the invention is also instead of in 1 a block-driven clamping set a weggesteuerter clamping set used. This eliminates the need for block pushing. The tightening disc is not pushed onto the stop but in screws 8th be tightened by a torque wrench with a defined torque and thus a defined shrink force adjustable.

Of the generally present disadvantage of a path-controlled two-part Clamping is now avoided by using a conical bushing. Because it is known that the diameter dependence is great. When using a conical bush and execution as path-controlled clamping set, this diameter tolerance is easily compensated, by small axial displacements of the attraction disc.

The Disadvantages of the three-part clamping set, namely high friction and the need for a reliable running Lubrication due to the strong friction-dependent torque dependence, are now avoided with the two-piece clamping set.

In the execution after 1 one end face of the press ring and one end face of the tightening disk are aligned.

In further embodiments of the invention, the adapter socket 4 with a cone angle for self-locking or non-self-locking of the adapter socket 4 leads, be executed.

The property of self-locking or non-self-locking is achieved by selecting the cone angle of the outer cone of the adapter socket 4 , the choice of materials of the contacting parts, such as adapter socket 4 , Hollow shaft 1 or the like, and determined by the choice of the lubricant.

In a further, thus not self-locking embodiment causes the tightening screw 25 with the press ring 5 together a bias that is definable on the tightening torque, and in addition an axial mechanical lock. Thus, a screw on stop is avoidable.

The invention also relates to devices which do not have an adapter socket 11 and associated stop 22 exhibit.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4230941 C2 [0002, 0002, 0003, 0003, 0004, 0005, 0005, 0005]
• - DE 10060037 C1 [0006]

Claims (24)

Clamping device for fastening a hollow shaft 3 on a full wave 1 , where the hollow shaft 3 or the hollow part at at least one of its ends an inner cone for receiving an adapter socket 4 having a corresponding outer cone and rests on the solid shaft and wherein the adapter socket 5 has at least one axially extending longitudinal slot, in particular continuous or non-continuous, wherein a two-part clamping set, comprising at least one pressing ring 5 , a shrinking force by means of the at least one press ring 5 on the hollow shaft 3 or the hollow part exerts, wherein the pressing ring 5 has an axial longitudinal slot. Clamping device according to at least one of the preceding claims, characterized in that the pressing ring 5 and / or the adapter socket 4 Each having an axial longitudinal slot, in particular by a continuous, or a plurality of axially extending non-continuous and / or closed running axial longitudinal slots. Clamping device according to at least one of the preceding claims, characterized in that as a two-part clamping set the pressing ring 5 having an outer cone on which a tightening disc 7 is arranged with a corresponding inner cone, in particular with axially oriented screws 8th are provided for moving the attraction ring on the outer cone of the compression ring, in particular where a plurality of screws 8th are arranged in the circumferential direction, in particular at the same radius distance from the axis, in particular to form a two-part displacement and / or force-controlled or block-pushed clamping set. Clamping device according to at least one of the preceding claims, characterized in that the pressing ring 5 a shoulder for forming a stop for the attraction ring, in particular at the axial end region of the compression ring, in particular for forming a two-part, path-controlled or block-pushed clamping set. Clamping device according to at least one of the preceding claims, characterized in that the hollow shaft 3 has no slot. Clamping device according to at least one of the preceding claims, characterized in that the inner cone of the hollow shaft 3 are processed by grinding. Clamping device according to at least one of the preceding claims, characterized in that the shrinking disc, in particular therefore the two-part clamping set, at least one pressing ring 5 and at least one tightening disk 7 and at least screws 8th includes. Clamping device according to at least one of the preceding claims, characterized in that the shrink disc and / or the tightening disc 7 axially within the hollow shaft 3 located. Clamping device according to at least one of the preceding claims, characterized in that the adapter socket 4 having a collar. Clamping device according to at least one of the preceding claims, characterized in that the tightening disc 7 Screw holes for the screws 8 when tightening the shrink disc, especially when mounting, has and more screw holes 20 has for disassembly, in particular the release of the tightening and / or peeling off at least the adapter socket 4 , Clamping device according to at least one of the preceding claims, characterized in that the solid shaft 1 a stop 22 has or is connected to a stop forming part for limiting the axial position of another adapter socket 11 , Clamping device according to at least one of the preceding claims, characterized in that the further adapter socket 11 having an outer cone and / or a collar Clamping device according to at least one of the preceding claims, characterized in that the adapter socket 4 designed so that they self-locking to the solid shaft 1 and / or hollow shaft 3 is. Clamping device according to at least one of the preceding claims, characterized in that the adapter socket 4 having a cone angle such that they self-locking to the solid shaft 1 and / or hollow shaft 3 is. Clamping device according to at least one of the preceding claims, characterized in that the outer cone of the adapter socket 4 and / or the inner cone of the hollow shaft 3 or the hollow part has a cone angle such that they self-locking to the solid shaft 1 and / or hollow shaft 3 is. Clamping device according to at least one of claims 1 to 14, characterized in that the adapter socket 4 designed so that they do not self-locking to the solid shaft 1 and / or hollow shaft 3 is. Clamping device according to at least one of claims 1 to 14 or 16, characterized in that the adapter socket 4 has a cone angle such that it is not self-locking to the solid shaft 1 and / or hollow shaft 3 is. Clamping device according to at least one of claims 1 to 14, 16 or 17, characterized in that the outer cone of the adapter socket 4 and / or the inner cone of the hollow shaft 3 or the hollow part has a cone angle such that it is not self-locking to the solid shaft 1 and / or hollow shaft 3 is. Clamping device according to at least one of the preceding claims, characterized in that a further component comprising at least one individual component acts on the solid shaft 1 works that way and with the full wave 1 is connectable so that the solid shaft 1 to the hollow shaft 3 or axially positioned, locked and / or biased to the hollow portion. Clamping device according to at least one of the preceding claims, characterized in that the component causes an axial mechanical locking, at least when the adapter socket 4 not designed to be self-locking and / or the cone angle of the outer cone of the adapter socket 4 , the materials and lubricants for non-self-locking of the adapter socket 4 to the hollow shaft 3 or to the hollow part is executed. Clamping device according to at least one of the preceding claims, characterized in that the component, the individual components tightening screw 8th and tightening disc 7 includes and / or at one end of the hollow shaft 3 or the hollow part is attached. Clamping device after at least one of the preceding Claims, characterized in that the component as a single component comprises at least one retaining ring, the is sunk into a groove of the solid shaft. Clamping device after at least one of the preceding Claims, characterized in that the component as a single component also includes shims. Clamping device according to claim 19, characterized in that the connecting a tightening, in particular the tightening screws 8th , includes or is.