DE202019005385U1 - Cross roller bearings - Google Patents

Abstract

Crossed roller bearings with an inner ring and an outer ring, between which a roller corridor is formed, in which roller rollers intersecting viewed along the circumferential direction of the roller corridor are arranged, each roller having a roller section, the roller section outer surface of which is on a roller track of the outer ring and / or on one Rolls of the inner ring rolls, characterized in that the axial length of the roller section of each roller in the direction of its axis of rotation is greater than the smallest outer diameter of the roller in the region of the roller section perpendicular to its axis of rotation.

Description

The invention relates to a crossed roller bearing with an inner ring and an outer ring, between which a roller corridor is formed, in which roller rollers intersecting viewed along the circumferential direction of the roller corridor are arranged, each roller having a roller section, the roller section outer surface of which is on a roller track of the outer ring and / or rolls on a runway of the inner ring.

Cross roller bearings have the particular advantage that they can absorb both radial forces and tilting moments. This is achieved by an alternately crossed arrangement of the rolling elements designed as cylindrical rollers in a rolling corridor with a square cross section. In practice, the diameter of the cylindrical rollers is slightly larger than their length.

Crossed roller bearings usually have an inner ring and an outer ring, two mutually perpendicular running surfaces of the rolling corridor being formed on the inner circumference of the outer ring, while two further mutually perpendicular running surfaces of the rolling corridor are formed on the outer circumference of the inner ring. In the case of these crossed roller bearings, the rolling corridor is square in cross section.

Out DE 102010019443 A1 is a spherical roller bearing with two rows of rollers arranged axially one behind the other between an inner bearing ring and an outer bearing ring, and with a loose rim ring arranged between the roller rows and assigned to the bearing rings, which has a trapezoidal or wedge cross-section that is adapted to the rollers. The rim ring has a predetermined radial clearance with respect to the associated bearing ring. If the spherical roller bearing is loaded radially, the rollers in the load zone push the rim ring radially outwards. As a result, the rim is moved radially inward in the no-load zone; he places himself on the end faces of the assigned rollers and moves them axially outwards, whereby they are stabilized.

JP H 10196649 A discloses a cross roller bearing in which a first tapered roller, which receives a load in a first axial direction and a radial direction, and a second tapered roller, which receives a load in a second axial direction and a radial direction, between an inner ring and an outer ring are held.

It is the object of the present invention to provide a crossed roller bearing which can be made both compact and at the same time particularly stiff.

The object is achieved by a crossed roller bearing, which is characterized in that the axial length of the roller section of each roller in the direction of its axis of rotation is greater than the smallest outside diameter of the roller in the region of the roller section perpendicular to its axis of rotation.

It was recognized in the manner according to the invention that the rolling corridor does not necessarily have to have a square cross section. Rather, the roller corridor can advantageously be designed in such a way that a shape and arrangement of the roller rollers that is advantageous in terms of enabling a particular compactness and rigidity is made possible. In particular, the rolling corridor can advantageously have a cross-sectional shape that generally deviates from the square shape and / or from a square shape.

The rolling rollers can, in particular at least in the region of the rolling section, be designed in the shape of a circular cylinder. Rolling rollers of this type are simple and inexpensive to produce. With such roller rollers, the outside diameter is the same everywhere at least in the area of the rolling section and, in this respect, forms the smallest outside diameter in the area of the rolling section.

Alternatively, the roller rollers can be frustoconical in order to avoid slippage. The background to this is that the end of a roller that is located radially further out has to travel a longer rolling distance than the end of the roller that is located radially inward. Slippage can be avoided by a frustoconical shape of the roller, whereby the required taper angle of the roller, among other things. from their length in the direction of their axis of rotation and the length of the mentioned, radially spaced rolling paths. In the case of rolling rollers of this type, the outside diameter in the region of their rolling section is different perpendicular to their axis of rotation, the end of the rolling section lying radially further outward in the crossed roller bearing having the largest outside diameter and the radially further inside end of the rolling section having the smallest outside diameter.

At least one section, which does not roll on one of the runways and therefore does not belong to the rolling section, can be connected to the rolling section of each roller. For example, the ends of each roller can be rounded, in particular hemispherical, or conical or frustoconical, and / or have a chamfer. It is also possible for the ends of each roller to be pointed.

According to a special, independent idea of the invention, it is provided that the crossing angle at which successive rolling rollers intersect with respect to their axes of rotation when viewed in the circumferential direction of the rolling corridor is adapted to the respectively planned requirements. The crossing angle can be 90 degrees (right angle), for example.

However, it is also advantageously possible for the crossing angle to be more than 90 degrees or for the crossing angle to be in the range from 95 to 135 degrees, in particular in the range from 105 to 125 degrees, for example in order to achieve a radially more compact overall size.

Alternatively, it is also advantageously possible for the crossing angle to be less than 90 degrees or for the crossing angle to be in the range from 85 to 40 degrees, in particular in the range from 85 to 60 degrees, for example when it comes to designing the crossed roller bearing in such a way that it can absorb particularly high tilting moments.

The cross roller bearing according to the invention is preferably designed such that the roller rollers each have an intersection section, the projection of the intersection section of a roller roller in the circumferential direction of the roller corridor onto a projection plane and the projection of the intersection section of a crossed roller roller in the circumferential direction of the roller corridor overlap onto the same projection plane. In addition to the crossing section, the rolling rollers can each have at least one non-crossing section.

In a very particularly advantageous embodiment, one end of the roller has the crossing section. In particular, the rolling corridor can have a V-shaped cross section.

For example, the ends of the roller rollers facing the inner ring can each have the crossing section. In particular, it can be provided, for example, that the inner ring has a V-shaped groove along its outer circumference, while the outer ring has an M-shaped contour along its inner circumference, so that a V-shaped rolling corridor is formed between the outer ring and the inner ring. In the roller corridor, only the ends of the roller rollers facing the inner ring touch (unless there is a packing).

Alternatively, the ends of the roller rollers facing the outer ring can each have the crossing section. In particular, it can be provided, for example, that the outer ring has a V-shaped groove along its inner circumference, while the inner ring has an M-shaped contour along its outer circumference, so that a V-shaped rolling corridor is formed between the inner ring and the outer ring only the ends of the roller rollers facing the outer ring touch each other (provided there is no packing). Such an embodiment has the further advantage that the filling with roller rollers can take place through a filler channel (or several filler channels) which runs through the inner ring. If the filler channel (or the several filler channels) runs through the inner ring, there is advantageously no need for the special sealing of the filler channel (s) against escaping grease, since the grease comes from the space surrounding the inner ring (sufficient axial Sealing provided) cannot get into the outer area of the cross roller bearing anyway.

In another embodiment, an axial central region of the roller has the crossing section. In particular, the rolling corridor can have an X-shaped cross section. This can be realized in particular in such a way that the outer ring along its inner circumference and the inner ring along its outer circumference each have an M-shaped contour.

Preferably, the outer ring and the inner ring each have a first roller track designed as a truncated cone surface, on which first of the rolling rollers roll. In addition, the outer ring and the inner ring preferably each have a second roller track designed as a truncated cone surface, on which second of the roller rollers, namely the second roller rollers arranged in a manner crossed to the first roller rollers, roll.

In a special embodiment, the first taxiways are arranged parallel to one another and the second taxiways are also arranged parallel to one another. In such an embodiment, roller rollers are used, which are each designed in the shape of a circular cylinder, in particular at least in the region of the roller section.

In another embodiment, the first runway of the outer ring has a larger cone angle than the first runway of the inner ring. In addition, the second runway of the outer ring has a larger cone angle than the second runway of the inner ring. In such an embodiment, roller rollers are used which, in particular at least in the region of the roller section, are each frustoconical.

In particular, it can advantageously be provided that the first and second roller tracks of the outer ring form an angle in cross section (measured on the side facing the rolling corridor) to one another, which is greater than 180 degrees, while the first and second roller tracks of the inner ring have an angle in cross section (measured on the side facing the rolling corridor) that is less than 180 degrees. Alternatively, it can be provided, conversely, that the first and second roller tracks of the outer ring have an angle in cross section (measured on the side facing the rolling corridor) that is less than 180 degrees, while the first and second roller tracks of the inner ring have a cross section Have angles (measured on the side facing the rolling corridor) to each other that is greater than 180 degrees.

In a very particularly advantageous embodiment, at least one axial section of the rolling section of each roller is a loading section, the outer lateral surface of which rolls on both a rolling track of the outer ring and a rolling track of the inner ring. The loading section in the direction of its axis of rotation of the respective roller can advantageously be longer than the smallest outside diameter of the roller in the region of the roller section perpendicular to its axis of rotation. In this way, a particularly high load capacity of the cross roller bearing against high tilting and / or buckling moments can be achieved.

In a very particularly advantageous embodiment and according to an independent inventive concept, the inner ring has at least one filling channel for filling at least some of the rolling rollers into the rolling corridor, the filling channel preferably opening into the rolling corridor at a point that lies outside the area on which the Roll off load sections of the roller rollers. As an alternative or in addition, it can advantageously be provided that the outer ring has at least one filling channel for filling at least some of the rolling rollers into the rolling corridor, the filling channel opening into the rolling corridor at a point that lies outside the area on which the load sections of the rolling rollers roll .

A version in which the filler channel runs through an area of the rolling corridor that is not loaded during operation (independent inventive concept) has the very special advantage that the function and longevity of the cross roller bearing is not impaired by the filler channel because the closure, which is never quite optimal in practice of the filling channel in such a design has no significant effect on the function of the cross roller bearing. This is because the closure lies outside the surfaces of the rolling corridor, which are loaded by the rolling roller bearings when radial and tilting forces occur. As will be explained in detail below, the filler channel can be closed particularly simply and advantageously with a sealing plug, the end of which does not have to have the properties of a loaded tread. This is because the end of the sealing plug is at most only part of an unloaded area of the rolling corridor.

Both the above-mentioned X-shaped design of the rolling corridor and the above-mentioned V-shaped design of the rolling corridor have the very special advantage that the surfaces of the rolling corridor, on which the front ends of the rolling rollers bear, are not loading surfaces on which the Rollers support the radial forces and tilting moments that occur during operation of the cross roller bearing.

In a very particularly advantageous embodiment of the cross roller bearing (and according to a further independent inventive concept), two filling channels are provided for filling the rolling rollers, a first filling channel being designed and oriented to fill rolling rollers with a first orientation into the rolling corridor, while the second filling channel is for this purpose is designed and aligned to fill the roller rollers into the rolling corridor with a second orientation crossed to the first orientation.

Such an embodiment has the very special advantage that the rolling rollers do not have to be filled into the rolling corridor alternately with different orientations through the same filling channel, but rather that each filling channel is assigned a single orientation of the rolling elements. Such an embodiment advantageously even enables automation of the filling.

Advantageously, it can be provided, for example, that one roller each is automatically inserted into the roller corridor through a respective filler channel and then the inner ring is rotated further relative to the outer ring until the next two roller rollers can be inserted into the roller corridor in the same way. The process is repeated until all the rollers are filled. In this case, the roller rollers can advantageously be stacked in the filler channels directly touching the end face. Such an automated filling of the roller corridor of a crossed roller bearing can advantageously be completed very quickly. In this way it is possible to fill the rolling corridor of a crossed roller bearing within a few seconds.

Specifically, according to a method for filling the rolling rollers into the rolling corridor of a cross roller bearing according to the invention, it can be provided that if the first filling channel and the second filling channel are in the same filling space of the rolling corridor open, the roller rollers are alternately filled through the first filler channel and through the second filler channel, the inner ring being rotated further relative to the outer ring each time after the filler roller has been filled in until the filler chamber is free again. The filling space is the volume of space within the rolling corridor in which a rolling roller arrives at the end of its insertion process. This process is repeated until the entire rolling corridor is filled.

An embodiment is particularly advantageous in which the first filler channel and the second filler channel open into two, in particular adjacent, filler rooms within the rolling corridor. In this case, the filling can be carried out in such a way that (simultaneously or sequentially) one roller each is filled through the first filling channel and through the second filling channel, the inner ring being rotated further relative to the outer ring after the two roller rollers have been filled in until both filling rooms are free again. This process is repeated until the entire rolling corridor is filled.

As will be explained in more detail below, filling bodies can advantageously be arranged between adjacent rolling rollers and / or between adjacent rolling rollers. In this case, too, the filling can be carried out as described above, in particular by means of an automatic machine, with correspondingly alternating rolling rollers and filling bodies being inserted in the same way. The filler channel or the filler channels are preferably designed such that the filler bodies with the intended end orientation, in particular exclusively with the intended end orientation, can be pushed through the filler duct into the rolling corridor.

The inlet openings of the filling channels can, for example, be arranged on the axial end faces of the inner ring or the outer ring. Alternatively, it is also possible for the inlet openings of the filling channels to be arranged on the outer peripheral surface of the outer ring or on the inner peripheral surface of the inner ring.

The filling channels preferably run obliquely (that is to say at an angle to the axial direction of the crossed roller bearing that differs from 0 ° and 90 °) through the inner ring or through the outer ring.

A particularly preferred embodiment is one in which the filling channels are designed such that the roller rollers with the intended end orientation of their axis of rotation, in particular exclusively with the intended end orientation of their axis of rotation, can be pushed through the filling channel into the rolling corridor.

The first filling channel can advantageously be dimensioned such that only rolling rollers that have the first orientation can be filled into the rolling corridor through it. In this way, correct alignment of the first roller rollers is automatically ensured. As an alternative or in addition, the second filling channel can be dimensioned such that only rolling rollers that have the second orientation can be filled into the rolling corridor through it. In this way, correct alignment of the second roller rollers is automatically ensured.

The filler channel or the filler channels can in particular be designed in the shape of a circular cylinder. Such an embodiment is particularly advantageous when it is a matter of ensuring that the rolling rollers can be pushed through the filler channel into the rolling corridor only with the intended end orientation of their axis of rotation.

However, it is also possible for the filler channels to have a rectangular, in particular square, cross section. Such an embodiment is particularly advantageous if, in addition, a filler is to be filled into the roller corridor after each roller; this is particularly the case if the filler body does not have a circular outer contour in cross section. However, even with a rectangular, in particular square, design of the filling channels, it is advantageous to dimension them in such a way that the rolling rollers (and possibly also the packing elements) are pushed through the filling channel into the rolling corridor only with the intended end orientation of their axis of rotation can.

In particular, in order to ensure that the rolling rollers (and possibly also the packing elements) can be pushed through the filling channel into the rolling corridor only with the intended final orientation of their axis of rotation, it can advantageously be provided that the filling channel or the filling channels are a have the smallest passage width (in the case of circular-cylindrical filling channels this corresponds to the inside diameter), which is smaller than the length of the rolling rollers in the direction of their axis of rotation, and / or which is a factor of 1.01 to 1.1 larger than the largest outside diameter of the roller rollers perpendicular to their axis of rotation.

A passage width that is as small as possible also has the very special advantage that the portion of the rolling corridor that is to be closed after filling with a sealing plug is particularly small. This is particularly advantageous if the filler channel runs through a roller conveyor of the rolling corridor that is loaded during operation, but how and how already stated above does not represent the preferred embodiment. Rather, an embodiment is preferred in which the filler channel runs through an area of the rolling corridor that is not loaded during operation.

In a special embodiment, there is a sealing plug that can be fixed in the filling channel, in particular in a form-fitting manner. If there are several filler channels, there is preferably one, in particular a form-fitting, closure plug that can be fixed in the filler channel for each filler channel.

In particular, it can advantageously be provided that the end of the sealing plug fixed in the filler channel facing the roller corridor is arranged within the filler channel and / or is set back from the roller corridor. With such a design, the sealing plug remains largely unloaded during operation of the cross roller bearing. In such an embodiment, the filler channel nevertheless preferably opens into the interior of the roller corridor through an area of the roller corridor that is not loaded during operation.

In another embodiment, the sealing plug has an end which, during manufacture, initially protrudes into the rolling corridor, in particular is made of a softer material than the rolling rollers. The end can for example consist of Teflon or have Teflon. In the operation of the crossed roller bearing, the end is removed automatically by the (preferably much harder) roller rollers, which can be made of steel, for example, until it is flush with the other surfaces that delimit the roller corridor. In such an embodiment as well, the filler channel preferably opens into the interior of the roller corridor through an area of the roller corridor that is not loaded during operation.

The sealing plug can have an external thread, for example, so that it can be screwed into the filling channel provided with an internal thread after the rolling rollers have been filled in. The sealing plug preferably has a fixed stop which defines its end position.

In a particularly advantageous embodiment which does not require a filler channel and which largely allows any cross-sectional shapes of the rolling corridor, an inner ring consisting of at least two partial inner rings and / or an outer ring consisting of at least two partial outer rings is present.

In particular, it can advantageously be provided that the inner ring has two partial inner rings which are joined together, in particular screwed together, along a plane perpendicular to the axial direction of the cross roller bearing, in particular detachable without destruction. As an alternative or in addition, it can advantageously be provided that the outer ring has two partial outer rings which are joined together, in particular screwed together, along a plane perpendicular to the axial direction of the cross roller bearing, in particular detachable without destruction.

These designs have the very special advantage that the rolling rollers can be inserted when the inner ring or outer ring is disassembled and the crossed roller bearing can then be closed by connecting the inner rings or the outer rings to one another, in particular by screwing them together.

In addition, these designs have the very special advantage that special shapes of the inner ring and outer ring are made possible, which would make assembly impossible with an undivided inner ring or outer ring.

In the case of an embodiment which enables the bearing play to be set precisely, the distance between the inner part rings is adjustable or the distance between the outer part rings is adjustable.

In order to permanently ensure a secure positioning of the part inner rings relative to one another, a disk which increases the friction value can advantageously be arranged between the part inner rings. Alternatively, it can also be provided that at least one of the part inner rings has a coating that increases the friction value. Analogously, it can alternatively be provided that a friction-increasing disk is arranged between the partial outer rings or that at least one of the partial outer rings has a coating that increases the friction value. The friction-enhancing disk or the friction-enhancing coating can be based, for example, on hard particles, such as, for example, diamond particles, which protrude from a holding material, in particular a chemical nickel matrix. When assembling the components, the hard particles press into the counter surfaces and thus create a microform fit.

In particular, as an alternative or in addition, a centering element, for example at least one bolt or at least one centering pin, can be present, which ensures correct positioning of the part inner rings or the part outer rings.

In order to permanently and securely position the partial inner rings or the partial outer rings relative to one another, an adhesive can alternatively or additionally be arranged between the partial inner rings or the partial outer rings.

In the case of a very particularly precise design, the partial inner rings are produced by breaking an inner ring which was initially produced in one piece. Alternatively or additionally, provision can advantageously be made for the partial outer rings to be produced by breaking an outer ring which is initially produced in one piece. Since the fracture surfaces allow only a single position of the precise assembly individually, a particularly high precision is achieved in this way. The procedure for the precise adjustment of the partial inner rings or partial outer rings relative to one another before they are connected, in particular screwed, is greatly simplified by the described procedure.

In order to ensure the relative positions of the roller rollers to one another during operation of the cross roller bearing, a filler (for example made of plastic, in particular Teflon) can be arranged in the circumferential direction in each case between adjacent roller rollers and / or between adjacent roller rollers.

The filler body can have contact surfaces which are shaped to complement the rolling rollers against which it rests. For example, fillers designed in this way can together form a roller cage.

Alternatively, the packing can be designed as a packing roller, which is arranged in the circumferential direction directly between adjacent rollers. In this case, the axis of rotation of the packing roller is preferably arranged on the same conical surface as the axes of rotation of the adjacent rollers next to it, between which it is arranged. The packing roller rollers can be made of a different material than the roller rollers. The packing rollers can be made of plastic, for example. However, it is also possible that the packing roller rollers are made of the same material as the roller rollers and also have a supporting function.

In particular, the packing rollers can be shorter in the direction of their axis of rotation than the rollers. The packing rollers can be circular cylindrical or frustoconical. The filler roller rolls are preferably circular cylindrical if the roller rolls are circular cylindrical. If the rolling rollers are frustoconical, the packing rollers are preferably also frustoconical. In particular, the packing roller rollers can function as spacers between the roller rollers that are next to one another.

As already mentioned, a roller cage can advantageously be present. If the crossed roller bearing has an inner ring consisting of part inner rings and / or an outer ring consisting of part outer rings, the roller cage can consist of one ring-shaped piece or of several, in particular two, ring-shaped pieces which, before connecting the part inner rings or the part outer rings in the rolling corridor can be inserted.

In a special embodiment, the inner ring and / or the outer ring have a receptacle, in particular designed as a circumferential groove or recess, for a sealing ring, in particular for a shaft sealing ring. Such an embodiment advantageously enables safe and simple gas-tight and / or liquid-tight coupling of external components to the crossed roller bearing.

The inner ring can advantageously have axial fastening bores, in particular through bores and / or threaded bores, for coupling the inner ring to other components. Alternatively or additionally, it can be provided that the outer ring has axial fastening bores, in particular through and / or threaded bores, for coupling the inner ring to other components.

• 1 schematisch in einer perspektivischen Schnittdarstellung ein erstes Ausführungsbeispiel eines erfindungsgemäßen Kreuzrollenlagers,
• 2 eine Querschnittdarstellung eines Details des ersten Ausführungsbeispiels
• 3 eine perspektivische Darstellung eines Details des ersten Ausführungsbeispiels,
• 4 schematisch in einer perspektivischen Schnittdarstellung ein zweites Ausführungsbeispiel eines erfindungsgemäßen Kreuzrollenlagers,
• 5 eine Querschnittdarstellung eines Details des zweiten Ausführungsbeispiels,
• 6 eine Querschnittdarstellung eines Details eines dritten Ausführungsbeispiels eines erfindungsgemäßen Kreuzrollenlagers,
• 7 eine andere Querschnittdarstellung des dritten Ausführungsbeispiels,
• 8 eine Querschnittdarstellung eines Details eines vierten Ausführungsbeispiels eines erfindungsgemäßen Kreuzrollenlagers,
• 9 eine andere Querschnittdarstellung des vierten Ausführungsbeispiels,
• 10 eine mögliche Ausführung einer Wälzrolle für ein erfindungsgemäßes Kreuzrollenlager,
• 11 eine andere mögliche Ausführung einer Wälzrolle für ein erfindungsgemäßes Kreuzrollenlager,
• 12 eine weitere mögliche Ausführung einer Wälzrolle für ein erfindungsgemäßes Kreuzrollenlager,
• 13 ausschnittsweise eine schematische Darstellung einer möglichen Anordnung der Wälzrollen bei einem erfindungsgemäßen Kreuzrollenlager in radialer Draufsicht, und
• 14 eine schematische Darstellung in radialer Draufsicht einer anderen möglichen Anordnung der Wälzrollen bei einem erfindungsgemäßen Kreuzrollenlager.

In the drawing, the subject matter of the invention is shown by way of example and schematically and is described below with reference to the figures, wherein elements that are the same or have the same effect are also usually provided with the same reference symbols in different exemplary embodiments. Show:

• 1 schematically in a perspective sectional view of a first embodiment of a cross roller bearing according to the invention,
• 2nd a cross-sectional view of a detail of the first embodiment
• 3rd 2 shows a perspective illustration of a detail of the first exemplary embodiment,
• 4th schematically in a perspective sectional view of a second embodiment of a cross roller bearing according to the invention,
• 5 2 shows a cross-sectional illustration of a detail of the second exemplary embodiment,
• 6 2 shows a cross-sectional illustration of a detail of a third exemplary embodiment of a crossed roller bearing according to the invention,
• 7 another cross-sectional view of the third embodiment,
• 8th 2 shows a cross-sectional illustration of a detail of a fourth exemplary embodiment of a crossed roller bearing according to the invention,
• 9 another cross-sectional representation of the fourth embodiment,
• 10th a possible design of a roller for an inventive crossed roller bearing,
• 11 another possible design of a roller for an inventive crossed roller bearing,
• 12th another possible embodiment of a roller for a crossed roller bearing according to the invention,
• 13 excerpts a schematic representation of a possible arrangement of the rolling rollers in a crossed roller bearing according to the invention in a radial top view, and
• 14 is a schematic representation in a radial top view of another possible arrangement of the rolling rollers in a cross roller bearing according to the invention.

The 1 to 4th show a first embodiment of a cross roller bearing according to the invention with an inner ring 1 and an outer ring 2nd , between which a V-shaped rolling corridor 3rd is formed in the along the circumferential direction of the rolling corridor 3rd looks at intersecting first rolling rollers 4th and second roller rollers 5 are arranged. 1 shows schematically in a perspective sectional view a first embodiment of a crossed roller bearing according to the invention, while 2nd illustrated in half a sectional view particular details of the first embodiment. How in particular 2nd shows, each first roller has 4th and every other roller 5 each with its own axis of rotation 10th on. The inner ring 1 is made of two inner rings 27 composed. The first and second rollers 4th , 5 are trained equally.

The inner ring 1 has a first inner ring runway designed as a truncated cone surface 6 on which the first rolling rollers 4th unroll. The inner ring 1 also has a second inner ring runway, also formed as a truncated cone surface 7 on which the second roller 5 unroll. The outer ring 2nd has a first outer ring runway designed as a truncated cone surface 8th on which the first rolling rollers 4th unroll. The outer ring 2nd also has a second outer ring runway, also designed as a truncated cone surface 9 on which the second roller 5 unroll.

The axial length 11 of the taxi section 16 every roller 4th , 5 in the direction of its axis of rotation 10th is larger than the smallest outside diameter 12th the roller 4th , 5 in the area of the rolling section 16 perpendicular to their axis of rotation 10th .

One axial section each of the rolling section 16 every first roller 4th is a stress section 13 , whose outer surface area both on the first inner ring runway 6 as well as on the first outer ring runway 8th rolls off. The stress section 13 every first roller 4th has an axial load section length 14 on. An axial section of the rolling section is analogous 16 every second roller 5 a stress section 13 , whose outer surface area both on the second inner ring runway 7 as well as on the second outer ring runway 9 rolls off. The stress section 13 every second roller 4th has a load section length 14 on.

3rd shows a perspective view of a detail of the first embodiment, namely the arrangement of the first rolling rollers 4th and the second roller 5 within the V-shaped rolling corridor 3rd .

4th shows schematically in a perspective sectional view a second embodiment of a cross roller bearing according to the invention with an inner ring 1 and an outer ring 2nd with a V-shaped corridor between them 3rd is formed in the along the circumferential direction of the rolling corridor 3rd looks at intersecting first rolling rollers 4th and second roller rollers 5 are arranged.

How 5 shows, each first roller has 4th and every other roller 5 each with its own axis of rotation 10th on.

The outer ring 2nd is made up of two outer rings 28 composed.

The inner ring 1 has a first inner ring runway designed as a truncated cone surface 6 on which the first rolling rollers 4th unroll. The inner ring 1 also has a second inner ring runway, also formed as a truncated cone surface 7 on which the second roller 5 unroll. The outer ring 2nd has a first outer ring runway designed as a truncated cone surface 8th on which the first rolling rollers 4th unroll. The outer ring 2nd also has a second outer ring runway, also designed as a truncated cone surface 9 on which the second roller 5 unroll.

The axial length 11 of the taxi section 16 every first and second roller 4th , 5 in the direction of its axis of rotation 10th is larger than the smallest outside diameter 12th the roller 4th , 5 in the area of Rolling section 16 perpendicular to their axis of rotation 10th .

In the circumferential direction of the rolling corridor 3rd successive first and second roller rollers 4th , 5 are in terms of their axes of rotation 10th at an intersection angle 15 , which is 90 degrees in this embodiment, arranged in a crossed manner.

6 shows schematically in a perspective sectional view a third embodiment of a cross roller bearing according to the invention with an inner ring 1 and an outer ring 2nd with a V-shaped corridor between them 3rd is formed in the along the circumferential direction of the rolling corridor 3rd looks at intersecting first rolling rollers 4th and second roller rollers 5 are arranged. Every first roller 4th and every other roller 5 each has its own axis of rotation 10th on.

The inner ring 1 has a first inner ring runway designed as a truncated cone surface 6 on which the first rolling rollers 4th unroll. The inner ring 1 also has a second inner ring runway, also formed as a truncated cone surface 7 on which the second roller 5 unroll. The outer ring 2nd has a first outer ring runway designed as a truncated cone surface 8th on which the first rolling rollers 4th unroll. The outer ring 2nd also has a second outer ring runway, also designed as a truncated cone surface 9 on which the second roller 5 unroll.

The axial length 11 of the taxi section 16 every roller 4th , 5 in the direction of its axis of rotation 10th is larger than the smallest outside diameter 12th the roller 4th , 5 in the area of the rolling section 16 perpendicular to their axis of rotation 10th .

7 shows the third embodiment of a cross roller bearing according to the invention in another sectional plane. How 7 shows, is an axial portion of the rolling portion 16 every first roller 4th a stress section 13 , whose outer surface area both on the first inner ring runway 6 as well as on the first outer ring runway 8th rolls off and the one load section length 14 having. An axial section of the rolling section is analogous 16 every second roller 5 a stress section 13 , whose outer surface area both on the second inner ring runway 7 as well as on the second outer ring runway 9 rolls off and the one load section length 14 having.

The outer ring 2nd has a first filler channel 17th and a second filler channel 18th on. Through the first filler channel 17th can the first rolling rollers 4th and through the second filler channel 18th can the second roller 5 be filled in. The first filling channel 17th is with a first sealing plug 19th using a first screw 20 attached, closed. The second filler channel 18th is with a second plug 21 using a second screw 22 attached, closed.

The 8th and 9 show schematically in a perspective sectional view, a fourth embodiment of a cross roller bearing according to the invention with an inner ring 1 and an outer ring 2nd , between which a V-shaped rolling corridor 3rd is formed in the along the circumferential direction of the rolling corridor 3rd looks at intersecting first rolling rollers 4th and second roller rollers 5 can be arranged.

The inner ring 1 has a first filler channel 17th and a second filler channel 18th on. Through the first filler channel 17th become the first rolling rollers 4th and through the second filler channel 18th become the second roller 5 filled.

The first filling channel 17th and the second filler channel 18th flow into the same filling space 25th within the rolling corridor 3rd . The filling room 25th is the volume of space within the rolling corridor 3rd , in which a roller at the end of its insertion process in the roller corridor 3rd arrives. The first rolling rollers 4th and the second roller rollers 5 are alternately through the first filling channel 17th and through the second filler channel 18th filled, each after filling a first or second roller 4th , 5 the inner ring 1 relative to the outer ring 2nd continue to rotate until the filling area 25th for the next roller 4th , 5 is free again. This process is repeated until the entire rolling corridor 3 is filled.

8th shows in a sectional view the situation before the insertion of the roller 4th , 5 in the Wölzkorridor3, where the cutting plane is the one that the filling channels 17th , 18th includes. 9 shows the cross roller bearing in a different sectional plane after filling the first and second roller rollers 4th , 5 in the Wölz Corridor3.

One axial section each of the rolling section 16 every first roller 4th is a stress section 13 , whose outer surface area both on the first inner ring runway 6 as well as on the first outer ring runway 8th rolls off. The stress section 13 every first roller 4th has an axial load section length 14 on. An axial section of the rolling section is analogous 16 every second roller 5 a stress section 13 , whose outer surface area both on the second inner ring runway 7 as well as on the second outer ring runway 9 rolls off. The stress section 13 every second roller 4th has a load section length 14 on.

The first filling channel 17th and the second filler channel 18th each flow into the rolling corridor at a point that lies outside the area on which the load sections are located 13 the rolling rollers 4th , 5 unroll.

10th shows a possible execution of a roller 4th , 5 for a crossed roller bearing according to the invention. The entire roller 4th , 5 is circular cylindrical.

11 shows another possible design of a roller 4th , 5 for a crossed roller bearing according to the invention. The rolling section 16 the roller 4th , 5 is circular cylindrical. At the rolling section 16 each end closes a hemispherical section 26 who is not on one of the runways 6 , 7 , 8th , 9 rolls and therefore not to the rolling section 16 heard.

12th shows a further possible execution of a roller 4th , 5 for a crossed roller bearing according to the invention. The rolling section 16 the roller 4th , 5 is frustoconical. At the rolling section 16 each end closes a hemispherical section 26 who is not on one of the runways 6 , 7 , 8th , 9 rolls and therefore not to the rolling section 16 heard.

13 shows schematically a section of a possible arrangement of the first and second roller rollers 4th , 5 in a crossed roller bearing according to the invention in a radial plan view. The first and second rollers 4th , 5 are trained equally.

In the circumferential direction directly between the first rolling rollers next to one another 4th is a first packing roller 23 arranged. The axes of rotation (not shown in this figure) of the first packing roller 23 are arranged on the same conical surface as the axes of rotation (not shown in this figure) of the first rolling rollers 4. The first packing roller 23 are axially shorter than the first rollers 4th .

In the circumferential direction directly between the next two adjacent roller rollers 5 is a second packing roller 24th arranged. The axes of rotation (not shown in this figure) of the second packing roller 24th are arranged on the same conical surface as the axes of rotation (not shown in this figure) of the second roller rollers 5 . The second packing roller 24th are axially shorter than the second roller rollers 5 .

14 shows a schematic representation of another possible arrangement of the roller rollers 4th , 5 in a cross-sectional radial top view of a crossed roller bearing according to the invention. In this version, the first and second rollers are 4th , 5 frustoconical and in a roller cage 29 arranged.

Reference list

1

Inner ring

2nd

Outer ring

3rd

Rolling corridor

4th

first rolling rollers

5

second roller rollers

6

first inner ring runway

7

second inner ring runway

8th

first outer ring runway

9

second outer ring runway

10th

Axis of rotation

11

axial length of the rolling section 16

12th

outer diameter

13

Loading section

14

Load section length

15

Crossing angle

16

Rolling section

17th

First filling channel

18th

Second filling channel

19th

first sealing plug

20

first screw

21

second plug

22

second screw

23

First packing roller

24th

second packing roller

25th

Filling space

26

hemispherical section

27

Partial inner rings

28

Partial outer rings

29

Roller cage

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102010019443 A1 [0004]

Claims (42)

Crossed roller bearings with an inner ring and an outer ring, between which a roller corridor is formed, in which roller rollers intersecting viewed along the circumferential direction of the roller corridor are arranged, each roller having a roller section, the roller section outer surface of which is on a roller track of the outer ring and / or on one Rolls of the inner ring rolls, characterized in that the axial length of the roller section of each roller in the direction of its axis of rotation is greater than the smallest outer diameter of the roller in the region of the roller section perpendicular to its axis of rotation. Cross roller bearing after Claim 1 , characterized in that the rolling rollers, in particular at least in the region of the rolling section, are each formed in the shape of a circular cylinder or a truncated cone. Cross roller bearing after Claim 1 or 2nd , characterized in that in the circumferential direction of the roller corridor successive roller rollers are arranged crossed with respect to their axes of rotation at an intersection angle. Cross roller bearing after Claim 3 , characterized in that the crossing angle is 90 degrees. Cross roller bearing after Claim 3 , characterized in that the crossing angle is more than 90 degrees or that the crossing angle is in the range from 95 to 135 degrees, in particular in the range from 105 to 125 degrees. Cross roller bearing after Claim 3 , characterized in that the crossing angle is less than 90 degrees or that the crossing angle is in the range from 85 to 40 degrees, in particular in the range from 85 to 60 degrees. Cross roller bearing according to one of the Claims 1 to 6 , characterized in that the roller rollers each have an intersection, the projection of the intersection of a roller in the circumferential direction of the roller corridor onto a projection plane and the projection of the intersection of a crossed roller in the circumferential direction of the roller corridor overlap on the same projection plane. Cross roller bearing after Claim 7 , characterized in that the roller rollers each have at least one non-crossing section in addition to the crossing section. Cross roller bearing after Claim 7 or 8th , characterized in that a. one end of the roller has the crossing section, or that b. the ends of the roller rollers facing the inner ring each have the crossing section, or that c. the ends of the roller rollers facing the outer ring each have the crossing section. Cross roller bearing according to one of the Claims 1 to 9 , characterized in that the rolling corridor is V-shaped in cross section. Cross roller bearing after Claim 7 or 8th , characterized in that in each case an axial central region of the roller has the crossing section. Cross roller bearing after Claim 11 , characterized in that a. the rolling corridor is X-shaped in cross section or that b. the rolling corridor has a shape deviating from the square shape in cross section, or that c. the rolling corridor has a shape deviating from a square shape in cross section. Cross roller bearing according to one of the Claims 1 to 12th , characterized in that the outer ring and the inner ring each have a first roller track designed as a truncated cone surface, on which first of the rolling rollers roll, and that the outer ring and the inner ring each have a second roller track designed as a truncated cone surface, on which second of the rolling rollers, namely the unroll the first roller rollers arranged in a crossed manner. Cross roller bearing after Claim 13 , characterized in that the first runways are arranged parallel to each other and that the second runways are arranged parallel to each other. Cross roller bearing after Claim 13 , characterized in that the first roller track of the outer ring has a larger cone angle than the first roller track of the inner ring, and that the second roller track of the outer ring has a larger cone angle than the second roller track of the inner ring. Cross roller bearing according to one of the Claims 13 to 15 , characterized in that a. the first and the second roller track of the outer ring have an angle to one another in cross section that is greater than 180 degrees, while the first and the second roller track of the inner ring have an angle to one another in cross section that is less than 180 degrees, or that b. the first and second roller tracks of the outer ring have an angle to one another in cross section that is less than 180 degrees, while the first and second roller tracks of the inner ring have an angle to one another in cross section that is greater than 180 degrees. Cross roller bearing according to one of the Claims 1 to 16 , characterized in that at least one axial section of the rolling section of each roller is a loading section, the outer surface of which rolls both on a rolling track of the outer ring and on a rolling track of the inner ring. Cross roller bearing after Claim 17 , characterized in that a. the inner ring has a filling channel for filling at least some of the rolling rollers into the rolling corridor, the filling channel opening into the rolling corridor at a point that lies outside the area on which the load sections of the rolling rollers roll, and / or that b. the outer ring has a filling channel for filling at least a part of the rolling rollers into the rolling corridor, the filling channel opening into the rolling corridor at a point which lies outside the area on which the load sections of the rolling rollers roll. Cross roller bearing according to one of the Claims 1 to 18th , characterized in that there are two filling channels for filling the rolling rollers, a first filling channel being designed and oriented to fill rolling rollers with a first orientation into the rolling corridor, while the second filling channel is designed and oriented to fill the rolling rollers with a first orientation fill crossed second alignment in the rolling corridor. Cross roller bearing after Claim 19 , characterized in that a. the first filler channel is dimensioned in such a way that only rolling rollers that have the first orientation can be filled into the rolling corridor through it, and / or that b. the second filler channel is dimensioned such that only rolling rollers that have the second orientation can be filled through it into the rolling corridor. Cross roller bearing according to one of the Claims 18 to 20 , characterized in that the filler channel or the filler channels are circular cylindrical or that the filler channels are rectangular in cross section, in particular square. Cross roller bearing according to one of the Claims 18 to 21 , characterized in that the filler channel or the filler channels have a smallest passage width, which is smaller than the length of the roller in the direction of their axis of rotation, and / or which is larger by a factor of 1.01 to 1.1 than the largest Outside diameter of the roller rollers perpendicular to their axis of rotation. Cross roller bearing according to one of the Claims 18 to 22 , characterized in that there is a, in particular a form-fitting, closure plug that can be fixed in the filler channel or that a filler plug, in particular a form-fit, fixable in the filler channel is provided for each filler channel. Cross roller bearing after Claim 23 , characterized in that the end of the sealing plug fixed in the filler channel facing the roller corridor is arranged within the filler channel and / or is set back from the roller corridor. Cross roller bearing after Claim 23 , characterized in that the sealing plug has an end protruding into the roller corridor during manufacture, in particular made of a softer material than the roller rollers, which is automatically removed by the roller rollers during operation until it is flush with the other surfaces that limit the cloud corridor. Cross roller bearing according to one of the Claims 1 to 17th , characterized in that a. the inner ring has two partial inner rings which are joined together, in particular screwed together, along a plane perpendicular to the axial direction of the cross roller bearing, in particular non-destructively, and / or that b. the outer ring has two partial outer rings which are joined together, in particular screwed together, along a plane perpendicular to the axial direction of the cross roller bearing, in particular detachable without destruction. Cross roller bearing after Claim 26 , characterized in that the distance between the part inner rings is adjustable or that the distance between the part outer rings is adjustable. Cross roller bearing after Claim 26 or 27 , characterized in that a. a friction-increasing disk is arranged between the part inner rings or that at least one of the part inner rings has a coating that increases the friction value or that b. a friction-increasing disc is arranged between the partial outer rings or that at least one of the partial outer rings has a coating that increases friction Cross roller bearing after Claim 26 or 27 , characterized in that an adhesive is arranged between the partial inner rings or that an adhesive is arranged between the partial outer rings. Cross roller bearing after Claim 26 , characterized in that the partial inner rings are produced by breaking an inner ring initially produced in one piece and / or in that the partial outer rings are produced by breaking an outer ring initially produced in one piece. Cross roller bearing according to one of the Claims 1 to 28 , characterized in that in each case a packing is arranged in the circumferential direction between adjacent roller rollers and / or between adjacent roller rollers. Cross roller bearing after Claim 31 , characterized in that the filler body has contact surfaces which are shaped to complement the rolling rollers against which it rests. Cross roller bearing after Claim 31 , characterized in that the filler body is designed as a filler roller, which is arranged in the circumferential direction directly between adjacent rollers next to it. Cross roller bearing after Claim 33 , characterized in that the packing roller is shorter in the direction of its axis of rotation than the rollers. Cross roller bearing after Claim 34 , characterized in that the filler roller is circular cylindrical or frustoconical. Cross roller bearing according to one of the Claims 1 to 35 , characterized in that at least one roller cage is present. Cross roller bearing after Claim 36 and after one of the Claims 31 to 35 , characterized in that the packing form the roller cage. Cross roller bearing according to one of the Claims 1 to 37 , characterized in that the inner ring and / or the outer ring have a receptacle, in particular as a circumferential groove or recess, for a sealing ring, in particular for a shaft sealing ring. Cross roller bearing according to one of the Claims 1 to 38 , characterized in that a. the inner ring has axial fastening bores, in particular through and / or threaded bores, for coupling the inner ring to other components, and / or that b. the outer ring has axial fastening bores, in particular through and / or threaded bores, for coupling the inner ring to other components. Automatic machine for filling the roller in the roller corridor of a cross roller bearing according to one of the Claims 1 to 39 , characterized in that a. if the first filling channel and the second filling channel open into the same filling space of the rolling corridor, the automaton alternately fills the rolling rollers through the first filling channel and through the second filling channel, the automaton rotating the inner ring relative to the outer ring further after each filling of a rolling roller, until the filling area is free again, or that b. If the first filler channel and the second filler channel open into two different, in particular adjacent, filler spaces of the roller corridor, the automaton fills one roller each through the first filler channel and through the second filler channel, the automaton relative to the inner ring after each filler roller filler the outer ring continues to rotate until the filling spaces are free again. Automat after Claim 40 , characterized in that the machine between the rollers each filled a filler through one of the filling channels in the rolling corridor, the respective filling chamber after the filling of the filler and before filling the next roller by the machine by rotating the inner ring relative to the outer ring is released again. Automat after Claim 40 or 41 , characterized in that a. the automat closes the first filler channel after filling the rolling rollers with the first sealing plug in such a way that one end of the first sealing plug protrudes into the rolling corridor and that the end is subsequently removed from the rolling rollers until it is flush, by the inner ring relative to the outer ring is rotated, and / or that b. the automat closes the second filler channel after filling the rolling rollers with the second sealing plug in such a way that one end of the second sealing plug projects into the rolling corridor and that the end is subsequently removed from the rolling rollers until it is flush, by the inner ring relative to the outer ring is rotated.

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