DE102009007957B4 - jig - Google Patents

Abstract

Clamping device for fastening a hollow shaft 3 on a solid shaft 1, the hollow shaft 3 or the hollow part having at least one of its ends an inner cone for receiving an adapter bushing 4, which has a corresponding outer cone and rests on the solid shaft, and wherein the adapter bushing 5 is at least one axially executed longitudinal slot, in particular continuously or not continuously, wherein a two-part clamping set, comprising at least one press ring 5, exerts a shrinking force by means of the at least one press ring 5 on the hollow shaft 3 or the hollow part, the press ring 5 having an axial longitudinal slot, wherein as two-piece clamping set of the press ring 5 has an outer cone on which a tightening washer 7 with a corresponding inner cone is arranged, axially oriented screws 8 being provided for displacing the tightening washer on the outer cone of the press ring, so that the two-part tightening set can be pushed onto a block, the two-piece clamping set and the tightening disc 7 axial ...

Description

The invention relates to a clamping 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.

From the DE 103 15 534 B4 is a tensioning device known with a two-part clamping set. This has the advantage that on the local outer flange 18 the local 1 Another feature is integrated, namely the connection via balls 24 with the mother 4 , so that the outer ring of the inner ring is easily axially separable.

The invention is therefore the object of developing a clamping device in a cost effective manner and with little effort during installation.

According to the invention the object is achieved in the clamping device for fastening a hollow shaft or a hollow part on a solid shaft according to the features specified in claim 1.

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.

The advantage here is that a play-free fitting is executable in a cost effective manner with few parts, many of which parts are inexpensive standard parts. Another advantage is that the hollow shaft has an inner cone, which is why no gradual courses must be performed and notch effect is reduced or even completely avoided. In addition, the inner cone makes the hollow shaft elastic and sufficiently deformable to forward the geometric changes.

In particular, should be generated when attaching or tightening the clamping device no axial displacement. Furthermore, the hollow part to be clamped should also be reliably radially clamped on roughly tolerated and / or different nominal diameters of full shafts using a simple and cost-effective design which manages with as many standard components as possible and requires only a small installation length.

In an advantageous embodiment, the pressing ring and / or the adapter socket each have an axial longitudinal slot, in particular a continuous, or a plurality of axially extending non-continuous and / or closed running axial longitudinal slots. The advantage here is that the deformation is as even as possible.

In an advantageous embodiment, the pressing ring has an outer cone, on which a tightening disc with a corresponding inner cone is arranged, in particular for forming a two-part displacement-and / or force-controlled or block-pushed clamping set. The advantage here is that a cost-effective clamping set is used, which is low maintenance and because of the conical design in the end of the hollow shaft also works precise and reliable. In particular, even disadvantages of a three-part clamping set can be avoided.

In an advantageous embodiment, the pressing ring has a shoulder for forming a stop for the tightening disk, in particular at the axial end region of the pressing ring, in particular for forming a two-part, path-controlled or block-pushed clamping set. The advantage here is that by means of the stop and the finished geometries, the clamping force can be specified.

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

In an advantageous embodiment, the inner cone of the solid shaft are processed by grinding. The advantage here is that particularly good fitting is possible.

In an advantageous embodiment, the shrink disk, in particular the two-part clamping set, comprises at least one press ring, at least one support disk, at least one tightening disk and at least screws. The advantage here is that a standard shrink disk with standard components is used.

In an advantageous embodiment, the shrink disk is the shrink disk and / or the attraction ring axially within the hollow shaft. The advantage here is that the installation length is extremely low.

In an advantageous embodiment, the adapter socket on a collar shaped in such a way that when disassembling a withdrawal by means of the tightening is executable. The advantage here is that a very simple and quick disassembly without special aids is executable.

In an advantageous embodiment, the tightening disc has screw holes for the screws when tightening the shrinking disk, in particular during assembly, and further screw holes for disassembly, loosening the shrink disk and / or removing at least the adapter socket. The advantage here is that no further screws are necessary and turning the tightening disc is not necessary during disassembly.

In an advantageous embodiment, the solid shaft has a stop for limiting the axial position of a further adapter socket. 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 advantage is that when removing the same screws are used as when tightening, so when mounting and dismounting the same screws are used. In addition, no rotation is necessary because already positioned screw holes are available.

In another advantageous embodiment, a support disk is attached to one end of the hollow shaft, which is releasably connectable by means of a tightening screw with the solid shaft. Thus, an axial centering and a bias of the hollow shaft to the solid shaft advantageously be effected.

In a further advantageous embodiment, the cone angle of the outer cone of the adapter socket is selected such that the adapter socket is not self-locking. In this embodiment, the support disk additionally causes a mechanical locking with the tightening screw. Thus, advantageously, such cone angle can be used, which allow an even easier disassembly.

In a further advantageous embodiment, the cone angle of the outer cone of the adapter socket is selected such that the adapter socket is self-locking. It is advantageous that further components for mechanical locking or the like are not necessary and thus simple and inexpensive versions are possible.

Further advantages emerge from the subclaims.

LIST OF REFERENCE NUMBERS

1

FULL WAVE

3

HOLLOW SHAFT

4

ADAPTER BUSH (slotted)

5

PRESSRING THE SHRINK DISC (slotted)

7

TAPPING DISC OF THE SHRINK DISC

8th

SCREW

11

CONIC SOCKET

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 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 hollow part devices, where the manufacturer supplies to customers using solid shafts with nominal diameters according to metric or inch system. Because with the present invention is given by replacing the example metric adapter sockets against adapter sockets with a dimensioned in inches inside diameter complete compatibility and use.

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.

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

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.

The common disadvantage of a path-controlled two-part clamping set is now avoided by using a conical bushing. Because it is known that the diameter dependence is great. When using a conical bushing and designed as a path-controlled clamping set, this diameter tolerance is easily compensated by small axial displacements of the tightening disk.

The disadvantages of the three-part clamping set, namely high friction and the need for reliable lubrication due to the strong Reibwertabhängigen torque dependence, are now avoided with the two-part 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.

Claims (20)

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 having an axial longitudinal slot, wherein as a two-part clamping set the pressing ring 5 having an outer cone on which a tightening disc 7 is arranged with corresponding inner cone, with axially oriented screws 8th are provided for moving the attraction ring on the outer cone of the compression ring, so that the two-part clamping set is slidable on block, wherein the two-part clamping set and the tightening 7 axially within the hollow shaft 3 are located, with the press ring 5 and / or the adapter socket 4 each having a plurality of axially extending, closed running and / or non-continuous, axial longitudinal slots, wherein on the outer cone of the press ring a plurality of screws 8th are arranged in the circumferential direction at the same radial distance from the axis, wherein 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, wherein the hollow shaft 3 has no slot. Clamping device according to claim 1, 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 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 shrinking disc is a two-part clamping set. 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 8th when tightening the shrink disk, especially during assembly, 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 8, 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 8 or 12, 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 8, 12 or 13, 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 according to at least one of the preceding claims, characterized in that the component comprises as a single component at least one securing ring which is sunk into a groove of the solid shaft. Clamping device according to at least one of the preceding claims, characterized in that the component also comprises shims as a single component. Clamping device according to at least one of the preceding claims, characterized in that the connecting a tightening, in particular the tightening screws 8th , includes or is.

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