DE9320344U1 - Non-positive quick clamping device for axial clamping tasks - Google Patents

Description

Description *··" ··* *.."*.." ..* !

The invention relates to a quick-clamping device on a smooth shaft in the manner corresponding to the claims.

Force-locking quick-clamping devices for supply rolls and spools are known per se (e.g. GM 7518465, G 91 01 360.7), although auxiliary tools are required for operation and e.g. G 91 01 360.7 is only suitable for a specific direction of shaft rotation. A device is also known under the name Quick-Loc, although this system can only be used for axial fastening, without the possibility of re-tightening. For the majority of comparable clamping tasks, form-locking systems, e.g. threaded spindles and nut elements, are used.

Furthermore, the arrangement according to the invention is a functional extension to, for example, a clamp connection (Figure 35, Dubbel, 14th edition, page 368), on whose clamping effect above the area of the self-locking limit the effectiveness and safety of the system depends, whereby the literature provides such friction locks preferably for axial applications, but the extension according to claim 2 can also transmit moment loads through a predetermined preload of the clamping ring.

The invention is therefore based on the object of creating a quick-clamping system which clamps force-fittingly, can be placed anywhere on the shaft, enables adjustable axial clamping forces, is suitable for both directions of rotation and can be operated/handled without additional tools.

Due to the inventive interaction of the components of the quick-clamping device, it meets these requirements and also has the advantage that it is not possible to loosen the clamping device in the operating state, since the friction forces increase proportionally to the normal forces due to the axial eccentric force acting on the clamping disk (5) in the area of the self-locking, according to the known static conditions of the self-locking <x<e see FIG 5.

The attached drawings show ^some examples of implementation of the subject matter of the invention:

It shows:
170

Figure 1

Supply roll (1) with quick-release device according to Figure 2 in working position (clamped).

Figure 2

A section through the quick-release device according to the invention.

Figure 3

A section through a different design of a quick-release device according to the invention.

Figure 4

A section through a different design of a quick-release device according to the invention.

Figure 1 shows the quick-clamping device in the working division (clamped), whereby the cone (2) centers a supply roll (1) by tightening it using the tensioning wheel (13) and a clamping distance (E) is created by the thread pitch between the clamping unit (B) and the clamping unit (C). To change the supply roll, the axial ring-shaped force (22) acting on the cones must reduce the force acting on the clamping unit via the thread by turning the tensioning wheel (13) in the loosening thread direction, whereby the clamping distance (E) is reduced as shown in Figure 2.

According to Figure 2, the position of the clamping ring (5) is adjustable by means of springs (6,14) relative to the locking ring (17) guided in the housing (4) and on the shaft (3), whereby by increasing the distance (F) the stronger spring (14) is compressed and the weaker springs (6) can relax against the parallel ring surfaces (7, 15). In the larger installation space between the surfaces (7, 15) the

the position of the clamping ring (5) now changes such that the spring action of the springs (6) ensures that the eccentrically diagonally opposite pins (8, 9) attached to the clamping ring (5) continue to maintain contact with the contact points (23). As a result, the clamping ring (5) is disengaged, as shown in Figure 5 as contact points F _NA and F _Nß , in such a way that the shaft can move freely. The vectorial overhang of the spring force of spring (14) acts on the clamping disk (5) in such a way that the clamping action FNA and FNB in the circumferential direction and to the shaft diameter d creates a predeterminable counter torque to the thread friction when the tensioning wheel (13) is actuated.

While retaining the basic structure, Figure 3 shows a closed housing (25) with a spring-loaded pressure piece (14, 26) which presses against the clamping disk (5) with a dominant force in counteraction to the springs (6).

This design is particularly suitable for larger shaft diameters.

The further interaction of the components is as previously described.

Figure 4 shows an embodiment without a spring (14) or spring-loaded pressure piece (26). The preload required to handle the clamping unit (B), which, as in Figure 2, acts on the clamping disk (5) via the contact point (23) and pin (9), is generated manually by an adjusting screw (24) which is provided with a locking element (27) to prevent it from falling out/being lost.

Designation:

Force-locking quick-clamping device for axial clamping tasks

Short version:

2.1.

In known clamping devices, the clamping of supply rolls and spools is carried out using positive-locking spindles with nut elements or smooth shafts with a force-locking locking mechanism, which is time-consuming, prone to wear and requires auxiliary tools. The quick-clamping device according to the invention should be able to be operated quickly and without auxiliary tools, even over long distances.

2.2.

A force-locking quick-clamping device (B, C) that can be moved axially on a smooth shaft, consisting of the connected components of the clamping unit (B) and clamping unit (C), centers and clamps a supply roll (1) between itself and a counter bearing (A) attached to the shaft. In the clamping unit (C) there is a clamping ring (5) pre-tensioned by springs (14) in a housing (4) with a stop (12), which increases its resistance to displacement on the shaft under the influence of axial forces. By means of the thread (11), an individual axial clamping force can be exerted on the supply roll (1) by turning the tensioning wheel (13), which is rotatably connected to a cone (2) via a ball bearing (10). To replace the roller, the cone (2) is screwed back through the tensioning wheel (13) and by removing the frictional connection between the clamping disc (5) and the shaft (3), the quick-release device can be pulled from the free shaft end.

2.3.

The quick-clamping system enables clamping processes on a smooth shaft, whereby long clamping distances with different roll widths can be quickly bridged. Thanks to the ball-bearing decoupling from the cone, the quick-clamping system can be used regardless of the direction of rotation.

Claims (1)

Patent claims ·· ·· ·· ··* ··* &idigr; Quick-clamping device according to Fig. 1-4 for generating axial clamping forces on a smooth shaft, in particular for supply rolls and spools, which are clamped between a stationary abutment and an abutment that can be moved axially on the shaft (3), by pushing the concentric quick-clamping device over the free shaft end (D) against the supply roll (1) and locking it in the opposite direction, characterized in that in a housing (4) a clamping ring (5) with mutually eccentrically arranged pins (8, 9) is pressed by axial force, e.g. spring (14), against the axially acting springs (6) between parallel ring surfaces (7, 15) in a tilted position and axially directed forces from the cone (2) via the pin (8) via ball bearings (10), thread (11) and end face (12) for the force-locking connection between the shaft (3) and clamping ring (5) in the area of self-locking, which can be individually increased by turning the tensioning wheel (13), whereby the spring force of spring (14) presses the surface (15) guided concentrically on the shaft against the pin (9), overcomes the spring forces of the springs (6) acting in direction (18, 19) and pre-tensions the clamping ring (5) and supports it vectorially. In the opposite way of handling, if the clamping effect is to be eliminated, the axial clamping force (22) is taken from the supply roll by turning the tensioning wheel (13) and the spring elements (6) are released by simultaneously pushing the tensioning wheel (13) apart in the direction of the surface (20) and the locking ring (17) is relaxed in the direction of the surface (21) against the spring force of the spring (14), so that the clamping ring (5) can no longer exert a normal force on the shaft (3) and the quick-release device can be pulled off the shaft against the locking direction. Quick clamping device Fig. 2 according to claim 1, characterized in that the pin (8) is attached to the clamping ring (5) and is engaged in an eccentrically arranged recess (16) of the front side (12) at the contact point (23) directed towards the cone (2) so that moment load can be transmitted through the clamping process via the thread (11). Quick-clamping device Fig. 2 according to claim 1, characterized in that by simultaneously pushing apart the locking ring (17) and the tensioning wheel (13) by simultaneously applying axially directed forces of equal strength to the surfaces (20) and (21), the installation space between the surfaces (7, 15) for the spring-loaded clamping disk (5) changes relatively, whereby the position of the clamping disk (5) changes while maintaining the contact points (23). Quick-clamping device Fig. 2 according to one of claims 1 to 3, characterized in that when the tensioning wheel (13) of the clamping ring (5) is rotated back, the frictional connection to the shaft is canceled by springs (6) which act on the clamping ring (5) from the direction (18, 19) opposite the pins (8, 9) and the clamping ring (5) is held in a defined position/location between the parallel ring surfaces (7, 15). Quick-clamping device Fig. 1 and 2 according to claim 1 and 2, characterized in that the cone (2) is rotatably connected to the clamping wheel (13) by ball bearings (10) and can be adjusted axially to the clamping unit (C) by means of a thread (11) and thus an individual clamping force can be generated via the clamping unit (B). Quick-clamping device Fig. 3 and 4 according to claims 1 to 5, characterized in that the function of locking ring (17), spring (14) and pin (9)^from Fig. 2^is realized by a resilient pressure piece (14, 26) (shown in Fig. 3) or also screw (24) (shown in Fig. 4Jl), which have counter bearings in the closed housing (25). Quick-clamping device Fig. 2 according to claims 4 to 6, characterized in that a small spring force from directions (18, 19) and a stronger spring force from spring (14) acting in the direction of contact points (23) on the clamping disk (5) causes the quick-clamping device to be displaced in the direction of the supply roll, i.e. against the locking direction, in that an axially directed force acts on the tensioning wheel (13) in the direction (20) and the second spring (14) acts as a backstop. Quick clamping device according to claims 1-7, characterized in that the spring force of the spring (14) is stronger than the spring force of the springs (6), whereby a defined normal force acts on the shaft (3) via the clamping ring (5) and thus a resistance to the rotation of the tensioning wheel (13) is provided.