WO2007088142A2

WO2007088142A2 - Rope pulley

Info

Publication number: WO2007088142A2
Application number: PCT/EP2007/050799
Authority: WO
Inventors: Jens Krüger; Günter Schmitt; Norbert Radinger; Helmut Kalb; Rudolf Bauer; Gerhard Prosch
Original assignee: Schaeffler Kg
Priority date: 2006-02-02
Filing date: 2007-01-26
Publication date: 2007-08-09
Also published as: WO2007088142A3; DE102006004719A1; DE102006004719B4

Abstract

The invention relates to a rope pulley (1) for the guidance, deflection and/or power transmission of a rope in relation to a support. In order to provide a compact structural unit, the rope pulley (1) comprises an integral bearing unit (6) which has a radially inner tread (49), rolling bodies (32), a radially outer tread (50) and a bearing housing (25). The rope pulley according to the invention can for example be used for passenger or goods elevators or for ski lifts.

Description

Name of the invention

pulley

description

Field of the invention

The invention relates to a pulley for guiding, deflecting and / or power transmission of a rope against a support point.

Background of the invention

From the patent DE 800 675 a pulley with a rubber lining for contact with a rope, in particular for cable cars, is known. The pulley has a radially inner hub, with the two annular, slightly curved inward in the radial direction so-called flanged discs made of sheet metal are bolted via suitable radial flanges of the hub. Radially outboard pressed from a sheet metal flanges are bolted to a metallic support ring. A rubber lining is formed with three axially adjacent rubber rings, wherein a middle rubber ring presses radially inwardly against the support ring and the two axially outboard rubber rings are supported under axial prestressing on the middle rubber ring and the associated flange.

From the patent specification DE 845 001 a single-groove V-belt pulley or pulley is known, which has two symmetrical sheets which are approximately conically shaped in the half cross-section with a large opening angle of the cone and are connected to each other via welding points in the region of their facing cone tips. Radially inside the sheets have axial Extensions that form a hub. About screws, the radially inner ends of the conical surfaces are axially clamped to each other, whereby a radial distortion of a radially inner hub can be done with a shaft.

From patent DE 934 374 it is known to integrate a roller bearing in a roller bearing, here a ball bearing. For this purpose, the rope pulley has a metallic base body designed with two essentially symmetrically formed cast parts, wherein an elastic raceway is caught radially outwardly between flanges of the castings and two roller bearings are caught radially inwardly between radial extensions of the cast parts.

From DE-OS 2,203,359 a pulley is known, which is formed with two mirror-image mutually facing pulley halves, which form a circumferential groove in which an insert ring is caught and clamped to guide the rope. The two disc halves have a plurality of conical surfaces and projections or eyes which abut each other in the assembled state of the pulley. The insert ring for guiding the rope is made of a non-metallic material, in particular polyamide, and preferably also contains a filler or a framework substance.

From DE 33 33 487 A1 a pulley with at least two symmetrical disc halves is known, which have a conical half-section and are connected to each other in the assembled state in the region of the tips of the conical surfaces via screws. Radially outboard a wear ring is received and caught in a groove formed between the disc halves, which contacts and guides the rope or a wire. Radially inwardly, the sheet metal halves form obtuse-angled guide surfaces on which a rolling bearing, in this case a ball bearing, is supported both radially and in both axial directions.

From AT 402 094 B a pulley is known in which the circumferential annular groove for Recording a cable guide is formed with two sheet metal halves and a connection between a hub and the aforementioned sheet metal halves is formed over two more sheet metal halves. A compound of the first-mentioned sheet metal halves and the second-mentioned sheet halves via U-shaped brackets. The radially inner plate halves form a support for a wheel body to which two axially spaced rolling bearings, here ball bearings, which are interposed between a continuous shaft and the pulley, supported.

From the patent CH 336 860 a pulley, for example for cable cars, chair and ski lifts, known which has a replaceable Einlegever- wear ring made of a plastic based on polyester with isocyanate, the Einlegeverschleißring edged on the inside, over the entire Has broadly extending projections or recesses, the form-fitting, "tightly closing" engage in the corresponding edged recesses on the outer surface of the insert ring bearing metal roller member. In this way, a firm, immovable seat of the plastic insert ring can be ensured on the roller part, whereby a walking and a width of the plastic insert ring to be avoided.

From US 4,548,592 it is known to form-fit an elastic ring of a pulley or a belt with a groove of the pulley for receiving the ring come into operative connection. For this purpose, the ring has both axially and radially inwardly oriented extensions which can enter into corresponding recesses of the cable pulley.

Further prior art is known from FR 2 171 660, DE 33 29 024 A1 and GB 1 434 717.

Object of the invention

The present invention has for its object to provide a pulley suggest that

the production, the use of materials, - the assembly, the mechanical properties, in particular when bridging large diameter between an inner hub and the rope diameter on the pulley (for example, in terms of deformations, even at high loads, run-out or concentricity and the like), - the service life and / or the maintenance effort

is improved.

Summary of the invention

According to the invention the object is solved by the features of independent claim 1. Further embodiments of the invention will become apparent from the dependent claims 2 to 17.

The invention relates to a pulley over which a cable can be guided or deflected relative to a support point and via which a power transmission can take place. The support point may be a stationary or moving support point, for example a shaft, a pin or another support device.

According to the invention, the pulley is not designed as a component which has to be mounted and stored in relation to the environment via an additional assembly or storage unit. Rather, the pulley has an integral storage unit. This storage unit can ensure a rotational movement of the pulley relative to the support point. For this purpose, the bearing unit has a radially inner and a radially outer running surface between which NEN rolling elements are arranged, and a bearing housing. For a connection of the pulley to the support point, only the radially inner tread must be attached to the support point.

- Due to the inventive design due to the use of the bearing unit at the joints between pulley and support point, in particular the radially inner tread and a corresponding mounting surface of the support point, no special requirements to make, as is the case for example, if a pin-shaped support point as a tread must be used for a rolling bearing.

Furthermore, the pulley can be delivered with the integral bearing unit as a mounting unit, which can be mounted in a simple manner with the support point, without a complicated assembly of

Storage elements, which can make increased demands on the mounting precision and the mounting cleanliness is required.

On the other hand, a bearing housing, which may be formed with one of the running surfaces or with other, additional components, a

Provide protection for the storage unit during transport and during attachment of the pulley to the support site.

In addition, as a result of the use of the bearing housing, the roller with integral bearing unit can already be provided with a lubricant upon delivery of the pulley, so that no additional complex lubrication has to be made for the installation of the pulley at the support point.

The bearing housing may be an open, sealed or largely closed housing. On the other hand, the formation of the pulley with integral storage unit offers the possibility of a factory Assembly of the storage unit, which can be automated with simplified assembly or increased precision. As a further sub-aspect, the invention has recognized that it is possible, a pulley with an integral storage unit, for the u. U. no replacement of rolling elements or tread takes place during the lifetime, a design as a lifetime-stable assembly is possible.

A further simplification of the production, improvement of the mechanical properties and reduction of the use of material can be achieved in that the pulley is formed with two interconnected, substantially symmetrical and metallic sheet metal halves. By using the substantially symmetrical sheet metal halves, the number of common parts used in the pulley is increased. The sheet metal halves can be produced inexpensively from cost-effective sheet metal semi-finished products using known forming techniques in a simple manner. In addition, the sheet metal halves each radially outwardly have a radial support surface and an axial support surface against which a non-metallic cable guide element, for example made of a plastic, is supported. Thus, the sheet metal halves can be designed multifunctional, since these serve on the one hand the receiving and supporting the cable guide element and on the other hand serve a bridging of the radial transfer space between the cable guide element and the radially inner bearing unit. In the event that the sheet metal halves with a suitable moment of inertia and resistance moment, for example by forming processes, bends, flaring o. Ä., Equipped, such bridging can be done despite a relatively low material usage with high rigidity.

Another function can fulfill the sheet metal halves, if they form radially inwardly, in the region facing the bearing unit, both a radial support surface and an axial support surface for at least one rolling bearing. Here, the bearings can be supported directly on the support surfaces or roll on this. Also possible is that between the Support surfaces and the rolling elements or bearings a suitable intermediate element, such as a bearing bush or a bearing ring is interposed, the material of which can be specifically adapted to the bearing properties and the surface and its concentric or axial run can be specifically adapted to the storage function.

As a further function, the sheet metal halves may be part of the bearing housing, whereby the material usage and the number of required for the pulley components can be further reduced.

With regard to the connection of the sheet metal halves with each other can be done via a fuse element according to a further embodiment of the invention, a positive locking. This results in a particularly simple embodiment of the securing element without the use of additional components in the event that the securing element is provided in the form of a plastic deformation of at least one half-sheet during the connection of the sheet halves. This can be done for example by common bending, folding or wrapping of portions of both halves of the sheet metal.

It is also possible that a sheet half has an additional recess, such as a hole or cutout, and is deformed when planting the sheet halves together a corresponding portion of the other sheet half in the bore, recess or cutout of the other sheet half. Alternatively, such a deformation may be carried out prior to the assembly of the two sheet metal halves, so that the deformed region enters into the recess for assembly.

The aforesaid securing element, which is thus formed integrally with the sheet metal halves, can provide a complete fastening of the sheet metal halves to one another or ensure a securing only in one direction, for example the radial direction and / or in the circumferential direction, while axially fixing the sheet metal halves to one another other suitable ones Measures or the installation conditions can take place.

According to a preferred embodiment of the pulley according to the invention, the sheet halves form radially outwardly a groove. The rope guiding element is inserted or injected into the groove, whereby a simple and cost-effective production process is provided. This is ensured by an injection-producing the cable guide element in an automatic manner that despite any tolerances in terms of production of the sheet halves and their connection with each other and tolerances of the groove thus produced a process-reliable contact between the cable guide element and the sheet halves is guaranteed. The axial and / or radial guidance of the cable guide element with respect to the sheet metal halves and the avoidance of rotation of the cable guide element about the axis of rotation of the cable pulley relative to the sheet metal halves can be accomplished in different alternative or cumulative ways:

By means of injection, the cable guide element can enter into a cohesive connection with the sheet metal halves.

Between additional cable guide element and the groove or the sheet metal halves additional fasteners such as screws, pins, jigs o. Ä. May be provided.

The cable guide element may have radial and / or axial projections or depressions which engage positively in corresponding radial and / or axial depressions or projections between one of the sheet metal halves. Such a positive connection provides a particularly reliable support of the cable guide element, since the positive locking can be achieved only for destruction of the projections or depressions (or deformation to a large extent). Thus, the positive connection also provides a particularly wear-resistant connection. About a sizing of Size of the contact surfaces between projections and depressions, the securing effect can be adapted to the stresses occurring during operation of the pulley. With regard to further embodiments of such projections and / or depressions, reference is made by way of example to the document US Pat. No. 4,548,592 mentioned in the introduction.

According to a further proposal of the invention, recesses or depressions can be formed particularly simply for a form-locking connection as explained above, if these recesses or depressions are formed between the two sheet-metal halves. For this purpose, the sheet halves may have appropriate, corresponding bulges in the axial direction, which can be easily produced by forming the sheet metal halves and complement each other with the assembly of the sheet halves to a radially oriented recess.

In the event that a durable pulley for u. U. increased loads to be given, the rolling elements of the bearing unit are designed as cylindrical rollers.

Preferably, the sheet halves form radially inwardly two hollow cylindrical bushes whose outer or inner circumferential surface

can be used directly as a tread or to support a tread.

Furthermore, it is possible that the bushings have radially inwardly oriented extensions. Such extensions can be arranged axially outboard, whereby they form part of the housing of the bearing unit and this particular axially complete. Alternatively, it is possible that the bushings are arranged axially inwardly and, for example, two axially adjacent rolling bearings separate from each other, wherein a support of the rolling bearing relative to the extensions can be made in the axial direction. The radially oriented extensions thus fulfill an axial support function and / or a Protective function.

In the event that a sealing effect is desired between such an extension and a radially inner running surface, a seal can be interposed between the aforementioned components. This may be a seal of any design, such as a gap seal, a labyrinth seal, a radial shaft seal, an elastic sealing element such as an O-ring o. Ä. The radially oriented extension and / or the tread may be suitable grooves, paragraphs o. Ä to produce the sealing effect or integration of a separate sealing element.

For a preferred embodiment of the pulley according to the invention, a raceway is guided in the bushing and between the extensions, the inner circumferential surface of which forms the radially outer running surface of the bearing unit. The running ring may have a special material for a suitable running surface and be designed with a surface having good rolling properties.

In case that

- Rooms for receiving a lubricant and / or

Rooms for receiving dirt particles

are desired in the area of the bearing unit, according to an advantageous development of the pulley, the radially inner running surface (or the radially outer running surface) provided with at least one recess or pocket, can be arranged in the lubricant for a permanent lubrication and / or in the dirt particles can be included.

An improved guidance of the rolling elements and thus improved running properties of the rolling bearing can result from the fact that the rolling elements are guided in at least one race cage. In a further embodiment of the invention, a spacer element is arranged between two rolling bearings in the bearing housing of the bearing unit, via which the distance and the exact position of the bearings can be specified and u. U. a support of the bearings can be done against each other.

In a further development of the pulley according to the invention, the inner running surface is formed with two substantially symmetrical raceway elements. The raceway elements have two subelements:

a half-section axially oriented leg, which provides a contact surface for the rolling elements of a rolling bearing and

a radially oriented leg, which can be used for a connection of the two raceway elements and a connection of the pulley to an adjacent component.

A particularly simple connection of the aforementioned raceway elements with each other or a form-fitting securing thereof at least in one direction, for example in the circumferential direction and / or in the radial direction, via a securing element. The securing element is - as described above for the securing element for the two sheet metal halves - made by a plastic deformation of at least one raceway element during the connection of the raceway elements. In the event that the raceway elements are hardened, a suitable deformation and / or the introduction of recesses takes place before assembly and hardening.

It is also possible to dispense with an inner raceway element, which is then provided, for example, by a stub shaft arranged in the cable pulley.

Additional closure elements for the bearing housing, such as a Cover, a shaft nut, a retaining ring o. Ä., Can be avoided if the bearing housing is closed after mounting the bearing unit via a forming process. In addition, such a forming process via a monitoring of the assembly state or the forming force offers a possibility of a case-oriented closure of the bearing housing and a case-by-case specification of distances. Furthermore, the number of necessary parts is reduced by such a closing of the bearing housing with a forming process, thereby u. U. also the weight of the pulley can be further reduced.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the introduction to the description are merely exemplary, without them necessarily having to be achieved by embodiments according to the invention. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

Brief description of the drawings

Further features of the invention will become apparent from the following description and the accompanying drawings in which embodiments of the invention are shown schematically. Show it: Figure 1 shows a first embodiment of a pulley according to the invention in a spatial representation;

FIG. 2 shows the pulley according to FIG. 1 viewed in the direction of the axis of rotation of the pulley;

FIG. 3 shows the pulley according to FIGS. 1 and 2 in a section along the axis of rotation;

Figure 4 shows a detail IV of the pulley according to Figures 1 -3;

5 shows an enlarged partial section through a plane having the axis of rotation in the region of a hub of the cable pulley according to FIGS.

Figure 6 shows an alternative embodiment of a cable pulley according to the invention;

FIG. 7 shows the cable pulley according to FIG. 6 viewed in a direction along the axis of rotation in a half view;

FIG. 8 shows the rope pulley according to FIGS. 6 and 7 in a sectional view when cut along a plane containing the axis of rotation; and

9 shows a detail IX of the pulley according to FIG. 8. Detailed description of the invention

The invention relates to a roller for guiding, deflecting and / or power transmission of a traction device which is mounted relative to a support point. A power transmission can take place between roller and traction means frictionally and / or positively. For the embodiments shown in the figures, the traction means is a rope, so that the roller is designed as a pulley. Under known per se modification of the contact area between traction means and roller, the invention can be used accordingly for different configurations, for example for the design of the traction means as a belt and embodiment of the role as a pulley or design of the traction means as a chain and embodiment of the role as a sprocket.

Figure 1 and Figure 2 show a pulley 1. The pulley 1 has radially outboard a contact area 2, which extends over the entire circumference of the pulley (or diverging from the illustrated embodiments for only small rotational movements of the pulley only over a partial circumference). Furthermore, the pulley 1 has a hub region 3 which is connected as rigidly as possible to the contact region 2 via a bridging region 4. The hub portion 3 serves to support the pulley 1 with respect to a support point, not shown, in which it is a continuous shaft through the pulley 1, a shaft end in the pulley 1 stub shaft, a continuous or ending in the pulley 1 pin or other suitable fastening member as a carrier or a flange can act. In the hub region 3, a bearing unit 6 is provided to allow a rotational movement of the pulley 1 about a rotation axis 5-5 relative to the support point. The orientation of the axis of rotation is also referred to below as "axial direction", while an orientation transverse to this is also referred to as "radial". According to Figure 3, the pulley 1 is formed with two substantially symmetrical sheet metal halves 7, 8. A sheet metal half 7, 8 is in a half section according to Figure 3 (upper or lower half) approximately in the form of a rectangular U formed with a base leg 9 and a radially inner side legs 10 and a radially outer side legs 1 1. The base leg 9 is in the half-section radially oriented, while the side legs 10, 1 1 are axially oriented. The circumferential side legs 10 form bushes 52, 53. The radially outer side leg 1 1 has a radially outwardly oriented extension 12, while the radially inner side leg 10 has a radially inwardly oriented extension 13 with a shoulder 14. The sheet metal halves 7, 8 are arranged mirror-inverted to each other with mutually aligned axes of symmetry, so that the base leg 9 abut each other at their backs.

The side legs 1 1 and extensions 12 of the sheet metal halves 7, 8 form an approximately U-shaped, outwardly oriented and circumferentially circumferential groove 15, in which a cable guide element 16 is arranged. Here, the side legs 11 form a radial support surface 17 in the contact region facing the cable guide element 16, while the inner sides of the extension 12 form an axial support surface 18 for the cable guide element 16.

The sheet metal halves 7, 8 have in the region of the base leg 9 axial, vonein- other directed bulges 19. The bulges 19 of the sheet halves 7, 8 form a plurality of distributed over the circumference, extending from the groove 15 radially inwardly extending depressions 20. For manufacturing of the cable guide element 16, the sheet metal halves 7, 8, in particular as an already preassembled unit, are inserted into a mold which has the radially outer contour 21 of the cable guide element 16. In this form, the material forming the cable guide element 16 is then introduced, in particular injected. In this way, in addition to a cohesive connection of the cable guide element 16 at Extension 12 and side legs 1 1 enter the material of the cable guide element 16 as shown in Figure 3 in the recess 20 and harden in this, which in addition to the connection of the cable guide member 16 on side legs 1 and extension 12 a positive connection between the cable guide element 16 and the Sheet metal halves can be produced (see Figure 4). The material entering the recess 20 of the cable guide element 16 in this case forms a projection 51. The recesses 20 and the associated projections 51 are, as can also be seen from Figure 2, evenly distributed over the circumference. For the embodiment shown in Figure 2, a total of six such recesses 20 and projections 51 are provided. Further bulges 19a and recesses 20a formed therewith may be provided for the purpose of stiffening the base legs 9, cf. FIG. 2.

A secure connection of the sheet metal halves 7, 8 via securing elements 22. The securing elements 22 is a compound, for example by Toxen, clinching, rivets, screws o. Ä. Alternatively or additionally, fuse elements can be designed as positive locking, wherein the Securing element 22 by plastic deformation between at least one sheet metal half 7 during the connection of the sheet metal halves 7, 8 is made. For this purpose, a sheet metal half 8 have a bore or recess into which the other sheet metal half 7 is deformed. It is also possible to "fold over" a partial material of a sheet metal half to the other sheet half or a common folding over of individual lobes or webs of both sheet metal halves 7, 8.

Providing a rotational movement about the axis of rotation 5-5, preferably with the formation of a radial gap 23, which is in particular sealed, a raceway 24 is radially inwardly of the sheet metal halves 7, 8 arranged, wherein the radial gap 23 between the lateral surface of the running rings 24 and the end faces of the paragraphs 14 is formed. The race 24, the shoulders 14, the extensions 13 and the side legs 10 form a, at least as far as possible, in the region of the radial gap 23 sealed bearing housing 25. For the embodiment shown in Figure 3, a sealing element 26 is provided in the region of the shoulder 14, which acts between the shoulder and the radially outer circumferential surface of the raceway 24.

Between the extensions 13 of the sheet metal halves 7, 8 a further raceway 27 is caught largely free of play in the axial direction, which is radially outboard of the side legs 1 1 of the sheet metal halves 7, 8 is supported. The raceway 27 is approximately U-shaped with a base leg 28 oriented in the direction of the axis of rotation 5-5 and two radially inwardly oriented side branches 29, 30, wherein the side legs 29, 30 together with the shoulders 14, the position of the sealing element 26th in the direction of the axis of rotation 5-5 pretend.

Approximately at axial extent of the side legs 29, 30 of the radially inner race 24 each have a diameter jump 31 radially outward.

In the bearing housing 25 rolling elements, here two axially adjacent rows of cylindrical rollers 32 are received, which are supported axially outwardly respectively on the side legs 29, 30 and the diameter jumps 31 of the races 24, 27, radially inwardly on the outer surface of the race 24 roll between the diameter jumps 31 and roll on an inner circumferential surface of the outer race 27. By means of a spacer 33, which in the embodiment shown in FIG. 3 is formed in a U-shaped manner in the half-section, the rows of cylindrical rollers 32 are kept at a distance. Furthermore, the cylindrical rollers 32 are guided in cages 34.

For the embodiment shown here, the raceway 24 is formed with two substantially symmetrical raceway elements 35, 36. The raceway elements 35, 36 are each approximately half-section L-shaped with a first leg 37 which is oriented approximately radially, and a second leg 38 which is approximately axially oriented. The leg 38 has the diameter jump 31. The raceway elements 35, 36 are in the region of the back sides of the legs 37 to each other and are secured together. In this case, a fastening takes place via a suitable securing element 39, 40:

The securing element 39 is approximately U-shaped and surrounds the radially inner ends of the legs 37 of the raceway elements 35, 36. In this case, the securing element 39 may be circumferential in the circumferential direction or may extend only over a partial circumference.

The securing element 40 is formed, for example, by forming a portion of the radial leg 37 of a raceway element 35 into a recess of the leg 37 of the other raceway element 36.

In FIG. 5, it can further be seen that, similar to the bulges 19 of the sheet metal halves 7, 8, the radial limbs 37 can have opposite bulges 41 in the assembly position, so that radially oriented depressions 42 occur between the limbs 37 of the raceway elements 35, 36 can be present. Such recesses 42 serve to receive lubricant as a lubricant reservoir or from interfering foreign particles.

An alternative embodiment of a cable pulley is shown in FIGS. 6 to 9, wherein components and features which correspond to the embodiment illustrated in FIGS. 1 to 5 are identified by the same reference number with the addition of the letter a.

According to Figure 6 and Figure 7, the bulges 19a are formed with triangular cross-section, the Ausbeultiefe decreases radially inwardly. Thus, the bulges 19a of the sheet metal halves 7a, 8a form recesses 20a with unevenness. dangerous diamond-shaped cross-section. Furthermore, in the side legs 11 a radial bores 43 are introduced, via which the mass and the moment of inertia of the pulley 1 a can be reduced and / or achieved an additional positive connection by entering the cable guide element 16 a with suitable radially inwardly oriented projections into the holes 43 can be.

In Figure 8 it can be seen that the two sheet metal halves 7, 8 are half-cut approximately "diabolo-shaped" composed. For this purpose, the base leg 9a has two legs 44, 45 oriented at an obtuse angle to one another, wherein the leg 45 forms an axially outwardly-oriented conical surface around the rotation axis 5a-5a, while the legs 44 of the sheet halves 7a, 8a form conical surfaces whose tips are directed towards each other, wherein the sheet halves 7a, 8a in the transition region 46 between the legs 44, 45 contact and are connected to each other via suitable securing elements 22a.

The side legs 10a are not deviating from the embodiment shown in Figures 1-5, starting from the base leg 9a axially outwardly oriented, but oriented inwards and toward each other. Thus, the side legs 1 1 a, the base leg 9a with the two legs 44, 45 and the side legs 10a not a U-shaped half-section, but rather a Z-shaped half-section. In the mutually facing end regions, the side legs 10a of the sheet metal halves 7a, 8a are connected to one another via a securing element 47, which in this case is formed as radially inward bends, entanglements or the like.

It can be seen in FIG. 9 that the extensions 12a can have axial bores 48 whose function corresponds to the function of the bores 43. Corresponding to Figure 5, the raceway 24 radially outwardly forms a running surface 49 for the cylindrical rollers, while the inner circumferential surface of the raceway 27 forms a tread 50 on which the cylindrical rollers 32 at its radially outer Roll off page.

The cable guide element 16 is preferably made of a glass fiber reinforced polyamide. The cable pulley 1 is used in particular for roller elevators, passenger elevators, goods lifts, ski lifts or the like. According to the invention, the pulley 1 can be formed with metal halves 7, 8 made of metal or plastic. For the use of plastic can u. U. a good noise attenuation of the pulley 1 result. In the case of use of pulleys 1 with a relatively large diameter of the cable guide element 16 relative to the hub region 3, a rigid bridging region can be provided by the embodiment according to the invention.

While the cable guide element is manufactured separately for the first exemplary embodiment according to FIGS. 1-5 and is supplied during assembly of the two sheet metal halves 7, 8, the cable guide element is sprayed after assembly of the sheet metal halves for the second exemplary embodiment according to FIGS , Due to the thick-bellied design of the sheet metal halves for the second embodiment, an increased rigidity can be provided. For the bearing elements, a full complement bearing can be used, for example, with two separate roller sleeves. Instead of such a roller bearing can be found differently use a multi-row ball bearing, the raceway or raceways can be integrated in the drawn rings. This has the advantage of a low axial play. Also conceivable are combinations of roller, needle or ball bearings.

LIST OF REFERENCE NUMBERS

1 pulley 31 diameter jump

2 contact area 32 cylindrical rollers

3 Hub area 33 Spacer

4 bridging area 34 cage

5 rotation axis 35 raceway element

6 Bearing unit 36 Bearing element

7 sheet half 37 radial leg

8 sheet half 38 axial leg

9 base leg 39 securing element

10 side legs 40 securing element

11 side legs 41 bulging

12 extension 42 recess

13 extension 43 bore

14 paragraph 44 thighs

15 groove 45 legs

16 cable guide element 46 transition region

17 radial support surface 47 fuse element

18 axial support surface 48 bore

19 Buckling 49 Tread inside

20 recess 50 tread outside

21 contour 51 projection

22 fuse element 52 socket

23 radial gap 53 bushing

24 race

25 bearing housing

26 sealing element

27 race

28 base legs

29 side legs

30 side legs

Claims

claims

1. Pulley for guiding, deflection and / or power transmission of a rope against a support point, characterized in that the pulley (1) has an integral bearing unit (6) having a radially inner running surface (49), rolling elements (cylindrical rollers 32), a radially outer tread (50) and - a bearing housing (25) has.

2. pulley according to claim 1, characterized in that the pulley (1) with two interconnected, substantially symmetrical and metallic sheet metal halves (7, 8) is formed, each radially outwardly both a radial support surface (17) and an axial Support surface (18) for a non-metallic cable guide element (16) form.

3. Pulley according to claim 1 or 2, characterized in that the sheet halves (7, 8) radially inwardly at least indirectly form both a radial support surface (side legs 10) and an axial support surface (extension 13) for at least one rolling bearing and part of the bearing housing (25).

4. Pulley according to one of the preceding claims, characterized in that the sheet metal halves (7, 8) at least in one direction via a securing element (22) are positively secured to each other, wherein the securing element (22) by a plastic deformation of at least one sheet half (7 , 8) during the connection of the sheet metal halves (7, 8) is made.

5. Pulley according to one of claims 2 to 4, characterized in that the cable guide element (16) in one of the sheet metal halves (7, 8) radially externally formed circumferential groove (15) is injected or inserted in this.

6. Pulley according to one of claims 2 to 5, characterized in that the cable guide element (16) has radial and / or axial projections (51) or recesses, the form-fitting in corresponding radial and / or axial recesses (20) or projections at least one of the

Sheet metal halves (7, 8) intervene.

7. pulley according to claim 6, characterized in that between the sheet halves (7, 8) radially oriented recesses (recess 20) are formed, in the projections (51) of the cable guide element (16) engage positively.

8. Pulley according to one of the preceding claims, characterized in that the rolling elements are designed as cylindrical rollers (32).

9. Pulley according to one of the preceding claims, characterized in that the sheet halves (7, 8) radially inwardly form two axially oriented legs (side legs 10) form.

10. pulley according to claim 9, characterized in that the side legs (10) radially inwardly oriented projections (13).

11. pulley according to claim 10, characterized in that between the radially inwardly oriented projections (13) and the radially inner running surface (49) has a seal (sealing element 26) is interposed.

12. pulley according to claim 10 or 1 1, characterized in that through the side legs (10) and the extensions (13), a raceway (27) is guided, whose inner circumferential surface forms the radially outer tread (50).

13. Pulley according to one of the preceding claims, characterized characterized in that a running surface (49) has a recess (42) or pocket.

14. Pulley according to one of the preceding claims, characterized in that the rolling bodies are guided in at least one running cage (34).

15. Pulley according to one of the preceding claims, characterized in that between two rolling bearings in the bearing housing (25), a spacer element (33) is arranged.

16. Pulley according to one of the preceding claims, characterized in that the inner running surface (49) with two substantially symmetrical raceway elements (35, 36) is formed, each having a axially oriented leg (38) in HaIb- cross section, the one Contact surface for the rolling elements of a rolling bearing provides, as well as a radially oriented leg (37) which serves to connect the two raceway elements (35, 36) and a connection of the pulley (1) to an adjacent component.

17. pulley according to claim 16, characterized in that the raceway elements (35, 36) at least in one direction via a securing element (39, 40) are positively secured to each other, wherein the securing element (39, 40) by a plastic deformation of at least one barrel - ring element (35, 36) during the connection of the raceway elements (35,

36) is made.

18. Pulley according to one of the preceding claims, characterized in that the bearing housing (25) after assembly of the bearing unit (6) is closed by a forming process.