DE9308717U1 - Cone clamping arrangement - Google Patents

Description

The invention relates to a conical clamping arrangement of the type corresponding to the preamble of claim 1.

Such a cone clamping arrangement is part of the state of the art through the unpublished DE 43 07 043 A 1. In this embodiment, the cone ring element abuts against the hub end with its thicker-walled end and grips the hub with a cylindrical bushing section, which is clamped under the hub and contributes to the torque transmission when the hub is compressed.

The hub requires a special design in the form of the recess for the bushing section.

The invention is based on the object of simplifying the manufacture of the hub for the manufacturer of the component belonging to it.

This object is solved by the invention set out in claim 1.

The cone ring element no longer engages with the

Bushing section under the hub, so that the corresponding recess in it is unnecessary. The flange extends radially in front of the hub end and rests against it.

In a first embodiment under consideration according to claim 2, the flange is penetrated by the clamping screws. The rotary connection from the hub area to the area of the conical ring element is created in this way by the clamping screws penetrating the holes in the flange.

The flange is given a further function by the jack screws according to claim 3, for which it can form an abutment.

The term "hub" is not only intended to refer to an actual hub, i.e. a cylindrical axial attachment to a component, but also to the connecting sleeve of a shaft coupling and generally to any sleeve-like cylindrical component that encloses a shaft and is to be connected to it by clamping.

From this perspective, the "hub" can also be part of a shaft coupling and sit on one end of the shaft. The "hub" is formed on a coupling sleeve and appears again at the other end. The hub there sits on the end of the other shaft.

Especially for this case, the arrangement of the axial clamping screws can be selected according to claim 5.

An important embodiment of the invention according to claim 6 consists in providing a lubrication system on the interacting conical surfaces, as is known per se from DE 33 05 538 C 1 or US 3 210 104. The lubrication system can not only support the clamping of the parts when the axial clamping screws are actuated, but also the selective loosening of the axially staggered pairs of conical surfaces.

The design according to claim 7 ensures that both sections of the stepped cone ring are clamped in such a way that the clamping of the

Hub enjoys the preference.

The manufacture of the hub can be simplified even further if the conical surface to be provided thereon is not provided on the hub itself, but rather on a separate thin-walled conical ring according to claim 8.

The stepped cone ring essentially results in a double fit, which requires a precise adjustment of the diameters of the cone surfaces. The adaptability of the stepped cone ring can be improved if a circumferential groove (external or internal) is made near the step in the thinner-walled part in a plane perpendicular to the axis, which weakens the cross-section except for a part necessary for the transmission of the torque and allows a certain independence of the radial expansion of the two sections of the stepped cone ring.

An outer stepped cone ring is known per se from DE 11 90 226 C 1. In the known embodiment, however, the outer stepped cone ring works together with a one-piece inner stepped cone ring to form a clamping set, while in the invention there are at least two parts inside and the function is different.

A hub fastening with staggered cone ring pairs is evident from DE 32 15 887 C 2, which also shows a hub with a diameter step on which a thin-walled cone ring is attached.

The drawing shows embodiments of the invention.

Fig. 1 shows a first embodiment in the form of a hub fastening, in which the conical clamping arrangement is shown in a section through the shaft axis;

Fig. 2 shows a corresponding view in which the hub is part of a shaft coupling.

In the cone clamping arrangement 100 of Fig. 1, a

Shaft 1 with a cylindrical outer circumference 2 is provided, on which an outer component 4 is arranged, which with a cylindrical inner circumference 3 rests centered on the outer circumference 2 of the shaft 1. The outer component 4 includes, for example, a flange 5 or a gear or any other functional part of this type and a hub 10 projecting axially therefrom, which surrounds the shaft 1. The outer component 4 is to be fixed to its hub 10 by clamping on the cylindrical inner circumferential surface 3 on the shaft 1.

For this purpose, the hub 10 has a diameter step 11 on its outer circumference, on which a thin-walled conical ring 12 with a cylindrical inner circumferential surface 14 is arranged, the front side of which abuts against the step 15 of the diameter step 11. In the exemplary embodiment, the thin-walled conical ring 12 is designed as a flange ring with a flange 6 projecting radially at its thicker-walled end, but this is not mandatory.

The conical outer peripheral surface 16 of the thin-walled cone ring 12 on the hub 10 has a self-locking cone angle and interacts with the conical inner peripheral surface 17 of a cone ring 18, which is integral with an axially forward cone ring part 22, which extends radially inwards in a step 19 in front of the end face 13 of the hub 10 and has a conical inner peripheral surface 21, which interacts with the conical outer peripheral surface 23 of a flange cone ring 7. The cone angle of the cone surfaces 21, 23 is the same as that of the cone surfaces 16, 17. The cone ring 18 and the cone ring part 22 together therefore form a stepped cone ring 30 with conical surfaces 17, 21 that are aligned and have the same angles.

At the thicker-walled end of the flange cone ring 7 facing the hub, it has a radially projecting flange 20 which axially rests against the front side 13 of the hub 10. The flange 20 extends into the area defined by the diameter step 19 of the stepped cone ring 30.

formed space, the axial extension 19' of which allows sufficient axial displacement of the stepped cone ring 30 towards the hub 10.

Axial clamping screws 32 are provided at points evenly distributed around the circumference, which in the exemplary embodiment pass from the left through a through hole 31, which is located radially at the height of the diameter step 19, in the conical ring part 22, reach through holes 9 of the flange 20 located at aligned points and are screwed into threaded holes 33 of the hub 10. In the circumferential direction between the holes 31, 9, 33 threaded holes are provided in the conical ring part 22, opposite which are hole-free points in the flange 20, so that when threaded screws are screwed into these threaded holes, the stepped conical ring 30 can be pulled off the conical surfaces 23, 16.

To facilitate the sliding of the conical surfaces 16, 17 and 21, 23 on each other, a system of groove-like channels can be provided in each of the interacting conical surfaces, of which a channel 24, 25 running in the circumferential direction is indicated in Fig. 1.

The circumferential channels 24,25 are connected via supply lines 26,27 to connections 28,29, via which fluid lubricant under very high pressure can be supplied, which spreads from the channels 24,25 in the axial direction over the sliding surfaces 16,17 and 21,23, respectively, and facilitates the sliding of the same in the axial direction.

When the cone clamping arrangement 100 is tightened axially using the clamping screws 32, the stepped cone ring 30 is tightened against the component 4. The cone ring 18 first comes into contact with the cone surface 16 of the hub 10 and begins to exert radial forces there, which, as the clamping force of the clamping screws 32 increases, presses the hub 10 together on the shaft 1. Before the full clamping is achieved, the cone surfaces

—&Oacgr;—

21,23 are pressed against each other and the flange cone ring 7 is clamped onto the shaft 1.

In order to increase the radial adaptability of the stepped cone ring 30 on the cone surface pairs 16, 17 and 21, 23, a circumferential groove 35 can be provided near the diameter step 19 in the part with the smaller wall thickness, which in the exemplary embodiment is an outer circumferential groove and has a depth of approximately half the wall thickness of the cone ring 18. The remaining cross-section is to be dimensioned such that the effective torques can still be transmitted at this point.

As far as functionally corresponding parts are present in the cone clamping arrangement 200 of Fig. 2, the reference numbers are the same. The main difference is that it is not a matter of securing a component 4 on a shaft 1, but of connecting two shaft ends 1, 1', which in the exemplary embodiment have the same diameter, by means of a coupling bush 34, which is arranged with its inner bore on the outer circumference 2, 2' of the shaft ends 1, 1' and has the "hubs" 10 at its axial ends, which are designed in the same way and interact with the flange cone bush 7 in the same way as in the embodiment 100. The same arrangement is only present again on the shaft end 1' on the right. The axial clamping screws 32' extend outside the cone surfaces 16, 17 over the entire length of the cone clamping arrangement 200 and connect the two stepped cone rings 30 to one another.

In this embodiment 200, the flanges 20 of the flange cone rings 7 have no through holes but merely serve as abutments for forcing screws which are screwed into axial threaded holes 37 of the step cone rings 30.

To increase the flexibility of the coupling bush 34, it can have through holes 36 in the longitudinal direction at a few points distributed around the circumference.

Claims (8)

Protection claims 1. Cone clamping arrangement for securing a hub (10) on a shaft (1,1'), with an outer peripheral surface (16) designed as a conical surface coaxial to the hub axis (A) on the hub (10), with a conical ring (18) having a conical inner circumferential surface (17) of the same cone angle and undivided in the circumferential direction, which is arranged with the inner circumferential surface (17) on the outer circumferential surface (16) of the hub (10), with a conical ring element (7) with a cylindrical inner circumferential surface (8) resting on the shaft (1,1'), arranged axially in front of the hub end (13) and abutting against it, with a conical outer circumferential surface (23), with a conical ring part (22) connected to the conical ring (18) at its end having the smaller diameter of the conical inner circumferential surface (17), undivided in the circumferential direction, located axially outside the end of the conical ring (18) and forming a stepped conical ring (30) with the latter, which has a D-4000 DÜSSELDORF 1 · MULVANYSTRASSE 2 · TELEPHONE 48/ 211 /83 27 27 · FAX 43 / 211 / 63 78 15 D-4300 ESSEN 1 · FROHUNQSTRASSE/3 V TiCq=QmJ I SHI^VOA · TELE?« 49/201 /4 19 97 · TELETEX 201 342 - RUHRPAT _ 9 — coaxial, conical inner peripheral surface (21) aligned in the same direction as its conical surface (17) and having the same conical angle, which forms a diameter step (19) towards the inside and rests on the outer peripheral surface (23) of the conical ring element (7), and with axial clamping screws (32,32') evenly distributed over the circumference by means of which the stepped cone ring (30) can be pulled onto the hub (10) or the cone ring element (7), characterized, that the conical ring element is designed as a flanged conical ring (7) with a flange located on the side of the hub end (13). 2. Cone clamping arrangement according to claim 1, characterized in that the clamping screws (32) run radially at the height of the diameter step (19) and pass through the flange (20) into bores (9). 3. Cone clamping arrangement according to claim 1 or 2, characterized in that axial forcing screws acting radially at the height of the diameter step (19) against bore-free areas of the flange (20) are provided. 4. Cone clamping arrangement according to one of claims 1 to 3, characterized in that the hub (10) is part of a coupling sleeve (34) for axially abutting shaft ends (1,1') and a stepped cone ring (30) is provided at both axial ends of the coupling sleeve (34). 5. Cone clamping arrangement according to one of claims 1 to 4, characterized in that the axial clamping screws (32') extend radially outside the conical surfaces (16,17). 6. Cone clamping arrangement according to one of claims 1 to 5, characterized in that a channel system (24, 25) is provided on at least one pair of conical surfaces (16, 17; 21, 23), to which lubricant under very high pressure, distributed over the respective pair of conical surfaces (16, 17; 21, 23), can be fed via a supply line (26, 27). 7. Cone clamping arrangement according to one of claims 1 to 6, characterized in that the diameters of the cone surface pairs (16,17 or 21,23) of the conical ring (18) and the hub (10) or of the conical ring part (22) and the flange conical ring (7) are matched to one another in such a way that when tightening the clamping screws (32,32') the conical ring (18) is first free of radial play and exerts clamping forces and the conical ring part (22) also becomes free of radial play and exerts radial clamping forces before the maximum axial displacement and tension of the conical ring (18) is reached. 8. Cone clamping arrangement according to one of claims 1 to 7, characterized in that a diameter step (11) is provided on the hub (10) and a thin-walled cone ring (12) is arranged thereon, which forms the conical outer circumferential surface (16) on the hub (10) and rests with its cylindrical inner circumferential surface (14) on the diameter step (11).