Loose bearing seat and bearing device

Abstract

The invention relates to a floating bearing seat (8) for a floating bearing (10) of a bearing device (2) for supporting a shaft (4), wherein, on the one hand, the floating bearing (10) has an outer ring (12) associated with the floating bearing seat (8) and an inner ring (14) associated with the shaft (4), and, on the other hand, the floating bearing seat (8) has a bearing receiving chamber (16) with a depth extension along a bearing axis (20) of the floating bearing (10) arranged in the floating bearing seat (8) and an extension extending perpendicular to this bearing axis (20) for receiving the floating bearing (10), wherein the bearing receiving chamber (16) is bounded perpendicular to the bearing axis (20) by means of a side wall (18) with a side surface facing the bearing receiving chamber (16), characterized in that at least one recess (24) is arranged in the side wall (18) such that, starting from a base (26) of the side surface at the recess (24), the side surface extends in the opposite direction to the storage room (16) recedes,so that a compensating mass (28) for fixing the outer ring (12) of the floating bearing (10) in the circumferential direction of the outer ring (12) can be received by means of the recess (24). Furthermore, the invention relates to a storage device (2).

Description

[0001] The invention relates to a loose bearing seat of the type mentioned in the preamble of claim 1 and a bearing device for supporting a shaft.

[0002] Such floating bearing seats and bearing devices for supporting a shaft are already known from the prior art in a multitude of embodiments, wherein, on the one hand, the floating bearing has an outer ring associated with the floating bearing seat and an inner ring associated with the shaft, and, on the other hand, the floating bearing seat has a bearing receiving space with a depth extension along a bearing axis of the floating bearing arranged in the floating bearing seat and an extension perpendicular to this bearing axis for receiving the floating bearing, and wherein the bearing receiving space is bounded perpendicular to the bearing axis by means of a side wall with a side surface facing the bearing receiving space.

[0003] The invention therefore addresses the problem of improving a loose bearing seat and a bearing device.

[0004] According to the invention, this problem is solved by a floating bearing seat with the features of claim 1, characterized in that at least one recess is arranged in the side wall such that the side surface, starting from a base of the side surface at the recess, retracts in the opposite direction to the bearing receiving space, so that a compensating mass for fixing the outer ring of the floating bearing in the circumferential direction of the outer ring can be received by means of the recess. Furthermore, this problem is solved by a bearing device with the features of claim 4. Advantageous embodiments and further developments of the invention are described in the following dependent claims.

[0005] The advantage achievable with the invention lies particularly in the fact that it provides a floating bearing seat. Due to the design of the floating bearing seat according to the invention, both a smooth-running floating bearing arrangement and a reliable assembly of the floating bearing are possible in a structurally and technically simple manner, without exceeding a permissible maximum assembly force for the floating bearing. Shaft bearing arrangements typically have a fixed bearing and a floating bearing. For smooth running, the floating bearing is positioned against the fixed bearing, for example, by means of a floating bearing shim. Additionally, a tight clearance fit between the bearing seat of the floating bearing and the outer ring of the floating bearing is selected for smooth running. This clearance fit is necessary for easy assembly. However, the clearance fit allows the outer ring of the floating bearing to rotate around its own axis due to vibrations, thus digging into the floating bearing seat.

[0006] For smooth operation, the gap caused by the clearance fit is usually filled with a soft adhesive, for example, or a floating bearing with a rubber O-ring, arranged in a groove of the outer ring of the floating bearing, is used. Such floating bearings are called rimmed floating bearings. In circular or circularly stepped bearing seats, the problem arises that the mounting force of the rimmed floating bearing exceeds the permissible axial force of the bearing, or that the force from excessively tight compression of the O-ring is higher than the axial force of the floating bearing shim. On the other hand, the use of adhesive is associated with a complex bonding process and a high susceptibility to failure of the bond.Susceptibility to failure means that the flexible adhesive bond, for example, can become too hard, so that the compensating washer can no longer flexibly adjust the floating bearing axially due to temperature fluctuations and the associated thermal expansion. The invention provides a remedy for this.

[0007] In principle, the floating bearing seat according to the invention can be freely selected within wide suitable limits with regard to type, function, material and dimensions. The same applies to the bearing device according to the invention.

[0008] A particularly advantageous embodiment of the loose bearing seat according to the invention provides that the at least one recess is designed as a plurality of recesses, wherein the recesses are arranged on the side wall and distributed uniformly around the circumference. Preferably, the recesses are arranged and dimensioned in the circumferential direction such that the recesses and sections of the base of the side surface of equal length are arranged alternately. In this way, the mechanical load on the compensating mass is distributed uniformly around the circumference of the outer ring. This is particularly true for the preferred embodiment of this embodiment. The necessity for the recesses may arise from the fact that elastomers / rubber materials are not compressible.Excess volume then requires a space to move away from the constriction; otherwise, the force in a narrow passage can increase progressively.

[0009] A further advantageous embodiment of the floating bearing seat according to the invention provides that the bearing receiving space is limited on one side along the bearing axis by means of a cover plate of the floating bearing seat, preferably that the cover plate closes the at least one recess on one side, and particularly preferably that the cover plate has a central through-opening. This allows the bearing receiving space to be at least partially closed on one side in a structurally and manufacturably simple manner, thus protecting it from the ingress of dirt. The preferred embodiment also has the advantage that the at least one recess has a one-sided boundary wall perpendicular to the bearing axis, so that, for example, compensating material introduced into the recess cannot escape from the bearing seat in an undesirable manner.Furthermore, the particularly preferred embodiment of this further development has the advantage that the shaft supported by means of the bearing device can extend along the bearing axis beyond the cover plate.

[0010] An advantageous embodiment of the bearing device according to the invention provides that the bearing device is designed such that the compensating mass can be arranged on the outer ring before the loose bearing is inserted into the bearing seat and can be inserted into the bearing seat together with the loose bearing. This allows for pre-assembly of the loose bearing, so that the loose bearing, together with the compensating mass arranged on its outer ring, can be installed in the bearing seat.

[0011] Furthermore, a further advantageous embodiment of the bearing device according to the invention provides that the compensating mass is designed as an elastomer, preferably as an O-ring. This enables the force-transmitting arrangement of the compensating mass on the outer ring of the floating bearing in a particularly simple manner. For example, the O-ring, as is common with conventional O-rings, can be positioned in a groove arranged in the outer ring.

[0012] In principle, other cross-sectional shapes, such as oval, square, rectangular, x-shaped, etc., are also conceivable for the leveling compound / corresponding ring.

[0013] An embodiment of the invention is shown purely schematically in the drawings and is described in more detail below. It shows Fig. 1 a perspective view of an O-ring before assembly and parts of the bearing device according to the invention, Fig. 1a an embodiment of the bearing device according to the invention with the floating bearing seat according to the invention in a partial, perspective view, Fig. 1b the compensating mass of the exemplary embodiment in an enlarged, partial unfolding with a view along the bearing axis, Fig. 2 the embodiment according to the Fig. 1a in an enlarged detail view in the area of ​​the loose bearing, Fig. 3 the loose bearing seat of the embodiment in a perspective view, and Fig. 4 the loose bearing seat according to the Fig. 3 in an enlarged detail view.

[0014] In the Fig. 1, Fig. 2, Fig. 3 to Fig. Figure 4 is an embodiment of the bearing device according to the invention with the loose bearing seat according to the invention, shown purely by way of example.

[0015] The bearing device 2 is designed to support a shaft 4 of a vacuum cleaner not shown in detail, wherein the bearing device 2 has a fixed bearing 6 arranged in a fixed bearing seat of the bearing device 2 (not shown) and a floating bearing 10 arranged in a floating bearing seat 8 of the bearing device 2, with an outer ring 12 associated with the floating bearing seat 8 and an inner ring 14 associated with the shaft 4.

[0016] The loose bearing seat 8 has a bearing receiving chamber 16 for receiving the loose bearing 10, the chamber having a depth extension along a bearing axis 20 of the loose bearing 10 arranged in the loose bearing seat 8 and an extension extending perpendicular to this bearing axis 20, wherein the bearing receiving chamber 16 is bounded perpendicular to the bearing axis 20 by a side wall 18 with a side surface facing the bearing receiving chamber 16. The bearing axis 20 is in the Fig. 1a and Fig. 2 with a dotted line and in the Fig. 3 and Fig. 4 is symbolized by a cross.

[0017] According to the invention, at least one recess, namely a plurality of recesses 24, is arranged in the side wall 18 such that the side surface, starting from a base 26 of the side surface, recedes in the opposite direction to the bearing receiving space 16 at the recesses 24, so that a compensating mass 28 for fixing the outer ring 12 of the floating bearing 10 in the circumferential direction of the outer ring 12 can be received by means of the recesses 24. The outer ring 12 is fixed to the floating bearing seat 8 in the circumferential direction of the outer ring 12 by means of the compensating mass 28 of the bearing device 2 arranged in the recesses 24.

[0018] The recesses 24 are arranged circumferentially and evenly distributed across the side surface on the side wall 18, wherein the recesses 24 are arranged and dimensioned circumferentially such that the recesses 24 and sections of the base 26 of the side surface of equal length are arranged alternately in the circumferential direction to the recesses 24. See the Fig. 3 and Fig. 4.

[0019] The bearing receiving space 16 is limited on one side by means of a cover plate 30 of the floating bearing seat 8 arranged perpendicular to the bearing axis 20 along the bearing axis 20, wherein the cover plate 30 closes the recesses 24 on one side, and wherein the cover plate 30 has a central through-opening for the shaft 4.

[0020] In the present embodiment, the bearing device 2 is designed such that the compensating mass 28 can be arranged on the outer ring 12 before the loose bearing 10 is inserted into the loose bearing seat 8 and can be inserted into the loose bearing seat 8 together with the loose bearing 10. The compensating mass 28 is designed here as an elastomer, namely as a circular and symmetrical O-ring. The state before assembly, in which the O-ring is circular and symmetrical, is shown in the figure. Fig. 1. The one in the Fig. 1a and Fig. The state shown in Figure 1b after assembly exhibits projections 29 corresponding to, or resulting from, the recesses 24. This means that it must be noted that this shape of the O-ring 28 only results from the parts of the bearing device 2 (not shown here for the sake of clarity) when the O-ring 28 is deformed after assembly so that the recesses 24 are filled by the elastomer.

[0021] The following describes the functioning of the bearing device according to the invention with the floating bearing seat according to the present embodiment with reference to the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 explained in more detail.

[0022] Initially, the bearing device 2 is in a disassembled state in which the compensating mass 28, designed as an O-ring, is not yet force-transmittingly connected to the loose bearing 10, as shown in Fig. 1 shown. A technician (not shown) grasps the O-ring, which is shaped and located in the Fig. 1b The compensating mass 28, shown separately, is inserted into a groove (not shown) in the outer ring 12 of the floating bearing 10 in a manner known to those skilled in the art. The floating bearing 10 is thus designed as a rimmed floating bearing. See Figure 1b. Fig. 1a and Fig. 2. The following is the lot 10, for example in the one from the Fig.1a as shown in the arrangement, inserted into the storage receiving space 16 of the loose bearing seat 8.

[0023] Due to the inventive design of the floating bearing seat 8 and the bearing assembly 2, a smooth-running floating bearing and a reliable assembly of the floating bearing 10 are both possible in a structurally and manufacturably simple manner, without exceeding a permissible maximum assembly force for the floating bearing 10. For smooth running, the floating bearing 10 is positioned against the fixed bearing 6, as is customary in the prior art, for example by means of a floating bearing compensating washer (not shown). Additionally, a tight clearance fit between the bearing seat 8 of the floating bearing 10 and the outer ring 12 of the floating bearing 10 is selected to ensure smooth running. This clearance fit is necessary for easy assembly.Without the O-ring compensating mass 28, the clearance fit would allow the outer ring 12 of the floating bearing 10 to rotate around the bearing axis 20 due to vibrations, causing the outer ring 12 to dig into the floating bearing seat 8. This is effectively prevented by the O-ring compensating mass 28. Furthermore, the problem that the mounting force of the rimmed floating bearing 10 could exceed its permissible axial force when installing the circular floating bearing seat 8 is effectively solved by the coordinated design of the floating bearing 10 with the O-ring compensating mass 28 and the side wall 18 of the floating bearing seat 8, which has recesses 24. The complex and failure-prone use of adhesives is also eliminated. See the relevant explanations in the introductory section.

[0024] However, the invention is not limited to the present embodiment. For example, the invention can also be advantageously used for other household appliances or the like.

Claims

[1] A floating bearing seat (8) for a floating bearing (10) of a bearing device (2) for supporting a shaft (4), wherein, on the one hand, the floating bearing (10) has an outer ring (12) associated with the floating bearing seat (8) and an inner ring (14) associated with the shaft (4), and, on the other hand, the floating bearing seat (8) has a bearing receiving space (16) with a depth extension along a bearing axis (20) of the floating bearing (10) arranged in the floating bearing seat (8) and an extension perpendicular to this bearing axis (20) for receiving the floating bearing (10), wherein the bearing receiving space (16) is bounded perpendicular to the bearing axis (20) by means of a side wall (18) with a side surface facing the bearing receiving space (16), characterized by, that in the side wall (18) at least one recess (24) is arranged such that the side surface recedes from a base (26) of the side surface in the opposite direction to the bearing receiving space (16) at the recess (24), so that a compensating mass (28) for fixing the outer ring (12) of the floating bearing (10) in the circumferential direction of the outer ring (12) can be received by means of the recess (24). [2] Loose bearing seat (8) according to claim 1, characterized by , that the at least one recess (24) is designed as a plurality of recesses (24), wherein the recesses (24) are arranged in the circumferential direction uniformly over the side surface on the side wall (18), preferably that the recesses (24) are arranged and dimensioned in the circumferential direction such that the recesses (24) and sections of equal length of the base (26) of the side surface are arranged alternately in the circumferential direction to the recesses (24). [3] Loose bearing seat (8) according to claim 1 or 2, characterized by that the bearing receiving space (16) is limited on one side by means of a cover plate (30) of the loose bearing seat (8) along the bearing axis (20), preferably that the cover plate (30) closes the at least one recess (24) on one side, particularly preferably that the cover plate (30) has a central through-opening. [4] Bearing device (2) for supporting a shaft (4), wherein the bearing device (2) comprises a fixed bearing (6) arranged in a fixed bearing seat of the bearing device (2) and a floating bearing (10) arranged in a floating bearing seat (8) of the bearing device (2) with an outer ring (12) associated with the floating bearing seat (8) and an inner ring (14) associated with the shaft (4), characterized by, that the loose bearing seat (8) is designed according to one of claims 1 to 3 and the outer ring (12) is fixed to the loose bearing seat (8) in the circumferential direction of the outer ring (12) by means of a compensating mass (28) arranged at least in the at least one recess (24) of the bearing device (2). [5] Storage device (2) according to claim 4, characterized by , that the bearing device (2) is designed such that the compensating mass (28) can be inserted between the outer ring (12) and the side surface of the side wall (18) after the loose bearing (10) has been inserted into the loose bearing seat (8). [6] Storage device (2) according to claim 4, characterized by , that the bearing device (2) is designed such that the compensating mass (28) can be arranged on the outer ring (12) before the loose bearing (10) is inserted into the loose bearing seat (8) and can be inserted into the loose bearing seat (8) together with the loose bearing (10). [7] Storage device (2) according to any one of claims 4 to 6, characterized by , that the compensating mass (28) is designed as an elastomer, preferably that the compensating mass (28) is designed as an O-ring.

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