DE102017116998A1 - Rolling element system comprising a roller and a bolt, rolling element arrangement, method for producing a roller body system - Google Patents

Abstract

It is proposed a rolling body system comprising a roller and a bolt, wherein the bolt is at least partially disposed in an at least substantially cylindrical recess of the roller, characterized in that the bolt in a main direction of extension of the roller a first outer portion, a second outer portion and a central portion, wherein the central portion is arranged in the main extension direction between the first and second outer portion, wherein the bolt in the central portion has a smaller average diameter than in the first outer portion and / or second outer portion.

Description

State of the art

The present invention is based on a roller body system comprising a roller and a bolt, wherein the bolt is arranged at least partially in an at least substantially cylindrical recess of the roller.

Further, the present invention is directed to a rolling body assembly comprising a plurality of rolling element systems according to an embodiment of the present invention.

Further, the present invention is directed to a method for producing a rolling element system according to an embodiment of the present invention.

Rolling body systems and rolling body devices are known in the prior art, in which a bolt is arranged in a cylindrical recess of a roller. In the operation of such rolling element systems and Walzkörpervorrichtungen there are always problems with the distribution of lubricants in the space between the inner wall of the roller and the bolt. A poor distribution of the lubricant or a (locally) poor permeability for the lubricant has a (partly strong) negative effect on the function of the rolling body systems.

Disclosure of the invention

It is an object of the present invention to provide a rolling element system which can be manufactured cost-effectively and / or has improved functionality during use.

To solve the problem, a roller body system comprising a roller and a bolt is proposed, wherein the bolt is at least partially disposed in an at least substantially cylindrical recess of the roller, characterized in that the bolt in a main direction of extension of the roller a first outer portion, a second outer central portion and a central portion, wherein the central portion is arranged in the main extension direction between the first and second outer portion, wherein the bolt in the central portion has a smaller average diameter than in the first outer portion and / or second outer portion.

In accordance with the invention, this advantageously makes it possible to produce improved properties for the lubricant flow in the intermediate space between the bolt and the roller. This is especially true for critical points in the central portion of the bolt, which is preferably also in the central region of the substantially cylindrical recess of the roller (along the main extension direction) is arranged. In particular, it is possible according to the invention that in this central portion of the bolt an improved flow of lubricant is possible, since bottlenecks between the bolt (or the outer wall of the bolt) and the inner wall of the roller are avoided / reduced by the inventive expression of the bolt, in particular in the event that heels and / or lugs on the inner wall of the roll are present. Such heels and / or noses may form, for example, in the production of the substantially cylindrical recess. Furthermore, it is possible according to the invention that the roller or the essentially cylindrical recess of the roller can be made particularly cost-effective, since post-processing steps (for example after a bore of the substantially cylindrical recess) can be simplified or can be omitted altogether or can be avoided / unnecessary are.

The cylindrical recesses of such rollers (especially long rollers) are typically made by drilling from both sides (faces) of the roller. In the connection point of the two holes thereby create paragraphs or noses. In the following, such shoulders / lugs must be laboriously removed in methods known from the prior art in order to avoid bottlenecks, so that it is possible in later operation for a lubricant to be distributed in the intermediate space between the inner wall of the roller and the bolt.

According to the invention, it is possible that the substantially cylindrical recess is a (completely) cylindrical recess, but also that the substantially cylindrical recess does not have an exactly circular, but for example locally deviating, base area (for example oval or a different kind) having the angle changing radius). It is alternatively or additionally possible that the base area of the substantially cylindrical recess changes in the main direction of extension of the roller or that it varies.

According to one embodiment of the present invention, it is provided that the substantially cylindrical recess extends from a first end face of the roll to a second end face of the roll along a main direction of extension of the roll.

According to one embodiment of the present invention, it is provided that the roller and the bolt in the central portion of non-contact are formed, wherein in particular the first outer portion of the bolt, the second outer portion of the bolt and the central portion of the bolt are arranged in the substantially cylindrical recess of the roller. In particular, it is advantageously possible that a further improved distribution / permeability of a lubricant is possible by the non-contact formation of the roller and the bolt in the central portion.

According to one embodiment of the present invention, it is provided that the bolt in the first and / or second outer portion is hardened, and in particular ground, wherein in particular the bolt in the central portion is free from hardening and / or grinding. According to one embodiment of the invention, it is possible in this case for the bolt to be designed in a particularly cost-saving manner, since the bolt (or the surface of the bolt) is hardened and / or ground only in the first and / or second outer portion, in particular for the case in that there is little or no mechanical contact in the central portion of the pin between the pin and the roller (in that the pin in the central portion has a smaller average diameter than in the first and / or second outer portion).

According to one embodiment of the present invention, it is provided that the roller in the substantially cylindrical recess, in the region of the central portion of the bolt, has a shoulder. According to one embodiment of the invention, it is thereby possible that the roller can be carried out particularly cost-saving. In particular, it is advantageously possible that a shoulder / nose, which results from the production of the substantially cylindrical recess, need not be removed in post-processing steps, and yet an advantageous distribution / permeability of a lubricant between the bolt and the inner wall of the roller (FIG. in particular in the central portion) is possible, in particular in that the bolt in the central portion has a smaller average diameter than in the first and / or second outer portion.

According to one embodiment of the present invention, it is provided that the roll in the main direction of extension has a first end region, adjacent to or comprising a first end face of the roll, and a second end region, adjacent to or comprising a second end face of the roll cylindrical recess in the first and / or second end region has an enlarged diameter, wherein the diameter of the substantially cylindrical recess, in particular increases in the first end to the first end face and / or wherein the diameter of the substantially cylindrical recess, in particular in the second end to the second end face increases. In this case, according to an embodiment of the invention, it is possible for a lubricant to be introduced more easily into the intermediate space between the roller (or inner wall of the roller) and the bolt, in that the substantially cylindrical recess in the first and / or second end region has an enlarged diameter (ie at the edges or end faces). Thus, it is advantageously possible according to the invention that the distance between the bolt (surface / outer wall of the bolt) and the inner wall of the roller in the first and / or second end region is increased. It is possible that the diameter of the substantially cylindrical recess increases in the first end region toward the first end face with different possible progressions, for example, the diameter can increase linearly, square, or with another function. It is also possible that the diameter first increases towards the first end face, then decreases and then increases again. It is alternatively or additionally possible for the diameter of the substantially cylindrical recess in the second end region to increase toward the second end face with different possible progressions, for example the diameter can increase linearly, quadratically or with another function. It is also possible that the diameter first increases towards the second end face, then decreases and then increases again.

According to one embodiment of the present invention, it is provided that the roll in the main direction of extension has a first end region, adjacent to or comprising a first end face of the roll, and a second end region, adjacent to or comprising a second end face of the roll cylindrical recess in the first end region has a funnel-shaped enlargement, and / or wherein the cylindrical recess in the second end region has a further funnel-shaped enlargement. In this case, according to an embodiment of the invention, it is advantageously possible for a lubricant to be introduced more easily into the space between the roller (or inner wall of the roller) and the bolt, in that the essentially cylindrical recess in the first and / or second end region has a funnel-shaped Magnification, wherein the funnel-shaped enlargement towards the first and / or second end face (in each case) becomes larger. Thus, it is possible according to the invention that the distance between the bolt (surface / outer wall of the bolt) and inner wall of the roller in the first and / or second end region is increased and results in an advantageous introduction behavior for a lubricant.

According to one embodiment of the present invention, it is provided that a lubricant, in particular a lubricating oil can be introduced into the substantially cylindrical recess, in particular in a gap between the pin and roller in the substantially cylindrical recess.

According to one embodiment of the present invention, it is provided that the bolt comprises a steel, wherein the bolt is in particular made of a steel.

According to one embodiment of the present invention, it is provided that the bolt has a first edge region adjacent to the first outer portion, wherein the bolt in the first edge region projects beyond the first end face of the roller and / or that the bolt has a second edge region adjacent to the second Having outer portion, wherein the bolt in the second edge region projects beyond the second end face of the roller.

According to one embodiment of the present invention, it is provided that the bolt in the first edge region is at least partially enclosed by a cage ring and / or wherein the bolt in the second edge region is at least partially surrounded by a further cage ring. In this case, according to an embodiment of the present invention, it is advantageously possible for the cage ring and / or the further cage ring to be part of a cage arrangement, the bolt thus being mounted in a cage arrangement. It is also or alternatively possible that the bolt is only loosely encompassed by the cage ring and / or the further cage ring or is introduced into the cage ring and / or the further cage ring.

The object mentioned at the outset is further achieved by a rolling body arrangement comprising a plurality of roller body systems according to an embodiment of the present invention.

For the rolling body assembly, the same advantages can be achieved, which have already been described in connection with the rolling body system according to the invention and / or in connection with embodiments of the rolling body system according to the invention.

Furthermore, the object mentioned is achieved by a method for producing a roller body system according to an embodiment of the present invention, wherein the substantially cylindrical recess of the roller in a first step by means of a bore, starting from a first end face of the roller, and a further bore Starting from a second end face of the roller, is produced, wherein the bolt is arranged in a second step following the first step in the substantially cylindrical recess.

For the method for producing a rolling body system, the same advantages can be achieved, which have already been described in connection with the roller body system according to the invention and / or in connection with embodiments of the roller body system according to the invention.

In particular, it is possible by the inventive method for producing a rolling body system to realize a rolling body system with an advantageous distribution behavior of a lubricant cost. According to one embodiment of the method according to the invention for producing a roll body system, it is advantageously possible that no post-processing step is necessary for removing (potentially) first-step ledges or noses in the inner wall of the roll (at the substantially cylindrical recess), in particular Nevertheless, an advantageous distribution behavior for lubricant between the roller and the bolt can be achieved, which saves costs in manufacturing.

Further details, features and advantages of the invention will become apparent from the drawings, as well as from the following description of preferred embodiments with reference to the drawings. The drawings illustrate only exemplary embodiments of the invention, which do not limit the inventive concept.

list of figures

• 1 schematically shows a rolling element system according to an embodiment of the present invention.

Embodiments of the invention

In 1 is schematically a rolling body system 1 according to an embodiment of the present invention. In this case, in particular, a cross section of a rolling body system 1 according to an embodiment of the present invention. Furthermore, there are several further roll body systems 1 according to an embodiment of the present invention, which taken together a rolling body assembly 10 according to an embodiment of the present invention. The rolling element system 1 includes a role 2 and a bolt 3 , The bolt 3 is in a first outer subarea 31 , a second outer portion 32 and a central portion 33 of the bolt 3 in a substantially cylindrical recess 4 the role 2 introduced or arranged. The central part area 33 is in a main direction of extension 100 (where the main direction of extension 100 through the arrow 100 characterized) between the first outer portion 31 and the second outer portion 32 arranged or attached. The bolt 3 owns in the middle section 33 a smaller average diameter than in the first and second outer portions 31 . 32 (that is, the diameter of the bolt 3 in particular averaged over the central portion 33 less than the diameter of the bolt 3 averaged over the first and / or second outer portion 31 . 32 ). This makes it possible that even in the case of heels / lugs on the inner wall of the roll 2 (such heels / noses are in 1 not shown), little or no mechanical contact between the bolt 3 and the role 2 in the area of the central portion 33 is present. A lubricant can thus be better between role 2 and bolts 3 distribute it as it is in the middle section 33 not (or only slightly) in places of mechanical contact between bolts 3 and role 2 stopped / stopped. Among other things, by the fact that no / hardly any contact in the central portion 33 between the bolt 3 and the role 2 is the bolt 3 (or its surface) only in the first and / or second outer portion 31 . 32 hardened and ground. The role 2 has a first end face 25 and an opposite second end face 26 on. In particular, the normal vectors are the first and second faces 25 . 26 each parallel to the axis of the main extension direction 100 , The normal vector of the first and / or second end face 25 . 26 may alternatively also be at a tilt angle to the axis of the main extension direction 100 stand. The role 2 includes in the main direction of extension 100 a first end area 21 comprising the first end face 25 the role 2 , and a second end region 22 comprising the second end face 26 the role 2 , The first end area 21 and the second end area 22 thus lie at opposite ends (or end faces) of the roll 2 , The essentially cylindrical recess 4 the role 2 points in the first end area 21 an enlarged diameter. In this case, the diameter of the substantially cylindrical recess 4 in the first end area 21 to the first end face 25 larger (ie takes from the inside of the roll to the edge (to the first end face 25 ) to). The increase in the diameter of the substantially cylindrical recess 4 is funnel-shaped, so that a funnel-shaped enlargement 51 (The substantially cylindrical recess 4 ) in the first end area 21 results. The essentially cylindrical recess 4 the role 2 points in the second end area 22 as well as an enlarged diameter. In this case, the diameter of the substantially cylindrical recess 4 in the second end area 22 to the second end face 26 bigger (takes from the inside of the role 2 to the edge (to the second end face 26 ) to). The increase in the diameter of the substantially cylindrical recess 4 is funnel-shaped, so that there is another funnel-shaped enlargement 52 (The substantially cylindrical recess 4 ) in the second end region 22 results. The bolt 3 includes in addition to the first outer portion 31 , second outer portion 32 and central portion 33 , a first edge area 34 adjacent to the first outer portion 31 , and a second border area 35 adjacent to the second outer portion 32 , The bolt 3 protrudes in the first edge area 34 over the first face 25 the role 2 out and protrudes in the second edge area 35 over the second end face 26 the role 2 out. The bolt 3 will be in the first border area 34 from a cage ring 40 includes and in the second border area 35 from another cage ring 41 includes. Using the cage ring 40 and further cage cage 41 is the bolt 3 (And also the rolling body system 1 ) are arranged in a cage arrangement. Preferably lies zw. Bored the bolt 3 while loose in the cage ring 40 and the other cage ring 41 ,

LIST OF REFERENCE NUMBERS

1

Roller body system

2

role

3

bolt

4

cylindrical recess

10

Roll body arrangement

21

first end area

22

second end area

25

first end face

26

second end face

31

first outer subarea

32

second outer subarea

33

central portion

35

first edge area

36

second border area

40

cage ring

41

another cage ring

51

funnel-shaped enlargement

52

further funnel-shaped enlargement

Claims (13)

Rolling body system (1) comprising a roller (2) and a bolt (3), wherein the bolt (3) is at least partially disposed in an at least substantially cylindrical recess (4) of the roller (2), characterized in that the bolt (3) in a main extension direction (100) of the roller (2) has a first outer portion (31), a second outer portion (32) and a central portion (33), wherein the central portion (33 ) in the main extension direction (100) between the first and second outer portion (31, 32) is arranged, wherein the bolt (3) in the central portion (33) has a smaller average diameter than in the first outer portion (31) and / or second outer portion (32). Rolling body system (1) according to Claim 1 wherein the substantially cylindrical recess (4) extends from a first end face (25) of the roll to a second end face (26) of the roll along a main extension direction (100) of the roll (2). Rolling body system (1) according to one of the preceding claims, wherein the roller (2) and the bolt (3) in the central portion (33) are formed without contact, in particular the first outer portion (31) of the bolt (3), the second outer Subregion (32) of the bolt (3) and the central portion (33) of the bolt (3) in the substantially cylindrical recess (4) of the roller (2) are arranged. Rolling body system (1) according to one of the preceding claims, wherein the bolt (3) in the first and / or second outer portion (31, 32) hardened, and in particular ground, wherein in particular the bolt (3) in the central portion (33) free from hardening and / or grinding. Rolling body system (1) according to one of the preceding claims, wherein the roller (2) in the substantially cylindrical recess (4), in the region of the central portion (33) of the bolt (3), a paragraph. Rolling body system (1) according to one of the preceding claims, wherein the roller (2) in the main extension direction (100) has a first end region (21), adjacent to or comprising a first end face (25) of the roller, and a second end portion (22), adjacent at or comprising a second end surface (26) of the roller, wherein the substantially cylindrical recess (4) in the first and / or second end portion (21, 22) has an enlarged diameter, wherein the diameter of the substantially cylindrical recess (4 ) increases in particular in the first end region (21) toward the first end face (25) and / or wherein the diameter of the substantially cylindrical recess (4) in particular in the second end region (22) increases towards the second end face (26). Rolling element system (1) according to one of the preceding claims, wherein the roller (2) in the main extension direction (100) has a first end region (21), adjacent to or comprising a first end face (25) of the roller (2), and a second end portion (22 ), adjoining or comprising a second end surface (26) of the roller (2), wherein the substantially cylindrical recess (4) in the first end region (21) has a funnel-shaped enlargement (51), and / or wherein the substantially cylindrical recess (4) in the second end region (22) has a further funnel-shaped enlargement (52). Rolling body system (1) according to one of the preceding claims, wherein a lubricant, in particular a lubricating oil in the substantially cylindrical recess (4) can be introduced, in particular in a space between the bolt (3) and roller (2) in the substantially cylindrical recess ( 4). Rolling body system (1) according to one of the preceding claims, wherein the bolt (3) comprises a steel, wherein the bolt is in particular made of a steel. Rolling body system (1) according to one of the preceding claims, wherein the bolt (3) has a first edge region (34) adjacent to the first outer portion (31), wherein the pin (3) in the first edge region (34) over the first end face ( 25) of the roller (2) and / or wherein the bolt (3) has a second edge region (35) adjacent to the second outer portion (32), wherein the bolt (3) in the second edge region (35) over the second end face (26) the role (2) survives. Rolling body system (1) according to Claim 9 wherein the bolt (3) in the first edge region (34) at least partially by a cage ring (40) is included and / or wherein the bolt (3) in the second edge region (35) at least partially by another cage ring (41) is included. A rolling body assembly (10) comprising a plurality of rolling element systems (1) according to any one of the preceding Claims 1 to 10 , Process for producing a rolling element system according to one of the Claims 1 to 10 wherein the substantially cylindrical recess (4) of the roller (2) in a first step by means of a bore, starting from a first end face (25) of the roller (2), and a further bore, from a second end face (26) Roll (2) starting, is produced, wherein the bolt (3) in a second step following the first step in the im Substantially cylindrical recess (4) is arranged.

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