Pocket chain wheel for diagonally running link chains

Abstract

The invention relates to a pocket chain wheel (1) for driving and / or deflecting a diagonally running link chain, in particular a round steel chain. The pocket chain wheel (1) is provided with a groove-shaped chain receiving area (12) which circulates in the circumferential direction (4) and which has two rows (14) of pockets (16), said rows being offset relative to each other in the circumferential direction. A respective chain link of the link chain can be received in each of the pockets (16), and each pair of pockets of a row (14), said pockets adjoining each other in the circumferential direction, is separated by a respective tooth (18). In order to fix the link chain in the position thereof and provide a flat support for the chain link, a trough-shaped depression (24) is provided on the base of each pocket, said depression being designed to complement an outer contour which extends from the location of one nose of a chain link to the location of the other nose of the chain link. The depression (24) thus forms a support for the chain link into which the chain link can fit. The depression (24) stabilizes the position of the round steel chain when the chain runs over the depression. At the same time, the flat support reduces the development of noise during operation. Finally, the bed (24) formed by the depression for the chain link prevents the chain link from rising up, which could otherwise lead to a tooth being missed while the link chain is running onto the pocket chain wheel.

Description

[0001] Pocket chain wheel for inclined link chains

[0002] The invention relates to a pocket chain sprocket for skewed link chains, such as round steel chains or profile steel chains. In skewed link chains, the chain links are not arranged alternately in a vertical and a horizontal plane, but rather all chain links are inclined or oriented diagonally relative to the vertical and horizontal. With reference to the pocket chain sprocket, this means that the chain links of the link chain are not aligned alternately parallel and perpendicular, but rather diagonally relative to a plane perpendicular to the axial direction. The chain links can, in particular, be aligned between approximately 30° and 60° relative to this plane.

[0003] Pocket chain wheels for inclined round steel chains are shown, for example, in DE 44 20 344 and DE 10 2011 055 204.

[0004] The present invention aims to improve the service life and operational reliability of the pocket chain wheels described therein for helical link chains, in particular round steel chains.

[0005] According to the invention, this object is achieved by a pocket chain wheel for driving and / or deflecting a slanted link chain, for example a round steel chain or a profile steel chain, with a circumferentially encircling and groove-shaped chain holder which has two rows of pockets running in the circumferential direction, wherein a chain link of the link chain can be received in each pocket and two circumferentially adjacent pockets of a row are each separated from one another by a tooth, and wherein a tooth of a row extends beyond an axial center plane of the chain holder in the direction of a pocket of the other row.

[0006] The link chain preferably has predetermined, particularly standardized dimensions. Examples of standardized round steel chains can be found in DIN-EN 818.

[0007] This design has the advantage that the chain cannot slip through or skip individual pockets. This means the chain can be held better. The axial center plane extends perpendicular to the axial direction along a center line of the chain holder. The above solution can be further improved by the following independently advantageous features that can be combined with one another as desired. In one advantageous design, there can be a trough-shaped depression at the base of each pocket, the longitudinal extent of which extends along the circumferential direction. The depression reduces wear because the chain links are secured against slipping by the depression. The improved guidance, particularly in the area of ​​the bow, prevents the chain links from rising in the pocket, which avoids malfunctions.

[0008] The recess or its inner contour can be designed to complement a section of the outer contour of the chain link extending from one point on the bow of a chain link to a point on the other bow of the chain link. The design of the recess, which is at least partially complementary to the outer contour of the chain link, allows the chain link to nestle into the recess, at least partially. This reduces noise during operation and reduces wear.

[0009] The recess can be designed, in particular, to accommodate at least one, preferably both, of the link chain. This improved guidance, particularly in the area of ​​the bend, i.e., the point where the force is primarily transmitted between the chain and the pocket chain wheel, can prevent the chain links from rising in the pocket, thus helping to avoid malfunctions.

[0010] The base of a pocket can be straight, tangential, or radius-parallel to the circumferential direction, so that it is not curved in the circumferential direction. This facilitates alignment and sliding of the chain links into the recess when the link chain runs onto the pocket sprocket. In the axial direction, the base can be curved.

[0011] In a further embodiment, at least one prong, preferably both prongs, of a chain link can rest flatly in the recess or be accommodated in the recess. Flat support can occur in particular in the circumferential direction of the sprocket, i.e., in the direction in which tensile forces act on the link chain.

[0012] In an advantageous embodiment, the depth of the recess is smaller than the material thickness of a chain link, so that a chain link only slightly penetrates the recess. The depth of the recess can, for example, be less than a quarter of the wire diameter of a chain link. Preferably, the depth of the recess is more than a tenth of the wire diameter of a chain link to ensure a minimum degree of guidance.

[0013] The two rows of pockets are offset relative to each other in the circumferential direction, for example, by one pitch of the link chain. Except for such an offset, the two rows can be mirror images of each other. All pockets in a row are preferably identical. This allows the same conditions to be created for each chain link.

[0014] A tooth in one row can be positioned circumferentially centrally between two adjacent teeth in the other row. The teeth in one row can be offset from the teeth in the other row by one pitch of the link chain. This design is useful for link chains with identically designed chain links.

[0015] In a further advantageous embodiment, an end of the tooth pointing towards the other row can be thickened in the circumferential direction. Such a thickening stabilizes the tooth and prevents it from breaking out. At the same time, such a thickening nestles better into the transition between the successive chain links. In particular, the thickening can be T-shaped, whereby the T-shape results from two extensions of the tooth that extend in opposite directions along the circumferential direction. At their base, the extensions can merge seamlessly into the bottom of the adjacent pockets, which increases stability. The base of a tooth and / or its extensions can widen in the radially inward direction.

[0016] The largest possible support area of ​​the chain link in the pocket is also ensured if the recess extends circumferentially from one tooth adjacent to a pocket in a row to the other tooth adjacent to the pocket in that row. With this design, the teeth can also absorb forces in the circumferential direction from the chain links or the chain.

[0017] According to a further embodiment, the depression of a pocket in a row can extend along a circumferentially facing flank of the tooth in the row adjacent to the pocket. In this way, the tooth can support part of the outer contour of the chain. It is even more advantageous if the depression extends along the opposite tooth flanks of the two teeth circumferentially defining a pocket. This allows both teeth to absorb forces occurring in the longitudinal direction of the chain. With this embodiment, the pocket chain sprocket can be loaded in both directions of rotation. The tooth flank in the sense of this description also includes the tooth root, i.e. the transition between the base of the pocket and the tooth.

[0018] A further embodiment may provide that the recess, particularly in its circumferential center between two circumferentially spaced teeth of the same row, is interrupted by a groove extending transversely to the recess and / or radially. The groove is also formed in the base of a pocket. Such a groove can accommodate lubricant, abrasion debris, and / or a weld bead of a chain link. The base of the groove is preferably deeper than the base of the recess.

[0019] Good stabilization of the chain links in an inclined position can be achieved if the recess or its longitudinal direction runs at an angle to the axial and radial direction in the area of ​​a tooth adjacent to the recess in the circumferential direction, for example on a tooth flank facing in the circumferential direction. The inclination can be 45°, for example, if the chain links of the link chain beyond the pocket chain sprocket run at an angle of 45° to the vertical or horizontal. With this type of recess design, the inclination of the link chain is better fixed by the inclination of the recess. Of course, other angular positions can also be stabilized by other inclinations of the curved section. For example, the inclination can be between 30° and 60°.

[0020] In one embodiment, the recess may have a straight section followed by two curved sections.

[0021] In the straight section, the recess has a straight profile. The straight section is preferably located at the bottom of a pocket. In the straight section of the recess, a leg of a chain link can preferably be accommodated in a flat manner. In the straight section, the recess or its longitudinal extension preferably runs in a straight line tangentially or radius-parallel to the circumferential direction. In the straight section, the inner contour of the recess can form a cylindrical surface. The straight section can be arranged centrally between two teeth in the circumferential direction.

[0022] In the curved section, the recess is curved, for example, along a circular arc. The curved section is designed in particular to accommodate the bow of a chain link in a flat manner. The curved section can be located at the transition from the bottom of the pocket to a tooth circumferentially delimiting the pocket, or at the base of this tooth. In particular, a curved section can be provided on each tooth flank of the teeth circumferentially delimiting a pocket. The tooth flank of a tooth can have a spatial curvature in one direction that runs parallel to the spatial curvature of a curved section.

[0023] The curved sections can extend longitudinally along an arc of a circle whose plane is inclined, in particular at 45°, relative to an axial plane and / or a radial plane. This plane coincides with the plane in which the chain link accommodated in the recess is to be aligned in the pocket.

[0024] Transverse to its longitudinal extent, the recess can have a circular arc-shaped cross-section. The radius of this circular arc preferably corresponds to at least half the material thickness or half the wire diameter of a chain link. This correspondence includes radii that are slightly larger, but preferably no more than 20% larger, than half the wire diameter of a chain link. This ensures that a chain link can still fit snugly into the recess.

[0025] The chain receptacle of the pocket chain sprocket can be delimited in the axial direction on one side, preferably both sides, by a side wall that is continuous, in particular in the circumferential direction. Each pocket can be delimited in the axial direction on only one side by a side wall. The side wall can form an axial end face of the pocket chain sprocket. The side walls can project beyond the teeth, i.e. extend further outwards in the radial direction than the teeth. A tooth can be materially connected to a side wall or merge into the side wall and extend from this side wall to the opposite side wall. However, there should be a gap between the tooth and the opposite side wall that corresponds at least to the material thickness or wire diameter of a chain link.In the radially outward direction, the tooth may preferably have curved entry slopes to facilitate the sinking of the chain link into a pocket.

[0026] In a further advantageous embodiment, a tooth in a row can extend radially outward on the sidewall closest to that row as a projection that projects less far from the sidewall in the axial direction toward the other row than the tooth itself. This measure stabilizes the tooth on the one hand. On the other hand, it leads to improved guidance of the link chain when entering and exiting the pocket chain sprocket.

[0027] Another measure to prevent tooth breakage can be for the tooth and / or projection to have a base that widens axially and radially toward the sprocket. In particular, the base can transition continuously and smoothly into a sidewall and / or bottom of the pocket. The transition can be curved or straight, for example.

[0028] Finally, it is advantageous if the pocket chain wheel is designed as a single piece, i.e. monolithic or as a single, molded body, which leads to low manufacturing costs and high stability.

[0029] The invention may also relate to an arrangement comprising a link chain, in particular a round steel chain, and a pocket chain wheel designed for the link chain.

[0030] The invention is explained in more detail below using possible embodiments with reference to the figures. In accordance with the above explanations, a feature of the embodiment described below can be omitted if its technical effect is unnecessary for a specific application. Conversely, a feature described above can also be added to the embodiment described below if the technical feature of this feature is required for a specific application.

[0031] In the figures, the same reference numerals are used for elements that correspond to one another in terms of structure and / or function. The differences between the different embodiments are primarily discussed in the various embodiments.

[0032] They show:

[0033] Fig. 1 is a schematic perspective view of a pocket chain wheel;

[0034] Fig. 2 is a schematic plan view of the pocket chain wheel of Fig. 1 in the radial direction;

[0035] Fig. 3 is a schematic sectional view of the pocket chain wheel of Fig. 2 in the direction III-III of Fig. 2.

[0036] Fig. 4 is a schematic sectional view of a pocket chain wheel with an inclined link chain;

[0037] Fig. 5 is a schematic perspective view of a link chain using the example of a round steel chain;

[0038] Fig. 6 is a schematic plan view of another pocket chain wheel in the radial direction; and

[0039] Fig. 7 is a schematic sectional view of the pocket chain wheel of Fig. 6 in the direction of view VIII-VIII of Fig. 6.

[0040] The pocket chain wheel according to the invention serves to deflect and / or drive a link chain, in particular a round steel chain 100, as schematically shown in Fig. 5. The round steel chain 100 is constructed from interlocking chain links 102 arranged one behind the other in a longitudinal direction of the chain. The chain links 102 of the round steel chain 100 are made of a round material, for example a steel wire. The steel wire is bent and welded together at its ends. Instead of a round steel chain, however, a link chain in the form of a profile steel chain, for example a link chain with a D-shaped wire profile, can also be used. In the following, a round steel chain is discussed as a representative of other forms of link chains.

[0041] A chain link 102 of a round steel chain 100, as described, for example, in DIN-EN 818, has two straight, parallel, spaced-apart legs 104 extending in the longitudinal direction of the chain, which are connected to one another at their ends located along the longitudinal direction of the chain by approximately circular bends 106. The legs 104 and the bend 106 enclose an opening 108 through which the two adjacent chain links extend. A chain link 102 lies in a plane spanned by the opening 108. Chain links 102 following one another in the longitudinal direction of the chain are tilted approximately 90° relative to one another; their planes are therefore perpendicular to one another.

[0042] Fig. 4 schematically shows how a slanted round steel chain 100 runs over a pocket chain sprocket 1. The pocket chain sprocket 1 is rotatable, for example, about an axis 2. The round steel chain 100 runs slanted because the planes of the chain links 102 are slanted, in particular at an angle between 30° and 60°, in particular at 45°, to the axial and radial directions.

[0043] The pocket chain sprocket 1 is described in more detail below with reference to Figs. 1 to 3. In Figs. 1 to 3, the round steel chain is omitted to provide a clear view of the structure of the pocket chain sprocket 1.

[0044] During operation, the pocket chain sprocket can rotate around an axis 2 in a circumferential direction 4 relative to, for example, a machine frame. A radial direction 6 runs perpendicular to the axial direction.

[0045] The pocket chain sprocket can be provided with one or two axle stubs 8 and / or a central opening 10. The axle stubs 8 can serve as bearings for the pocket chain sprocket. An axle or a shaft can be accommodated in the central opening 10.

[0046] The pocket chain sprocket 1 has a chain receptacle 12 which runs in the circumferential direction 4 and is groove-shaped. The chain receptacle 12 thus forms a recess in which the round steel chain can be received. The chain receptacle has two rows 14 of pockets 16 arranged one behind the other in the circumferential direction 4. Each pocket 16 can accommodate a chain link of the round steel chain. Two pockets 16 of a row 14 which are adjacent or consecutive in the circumferential direction 4, for example pockets 16a, 16b in Fig. 2, are each separated from one another by a tooth 18. During operation, the end of the tooth 18 facing the other row projects into the opening 108 between the two chain links 102 extending through this opening. The two chain links separated by the tooth 18 are received in the pockets 16 of the row in which the tooth 18 is located.

[0047] At the base 22 of a pocket 16 is a trough- or groove-shaped recess 24, which forms a bed or support for the chain link accommodated in the respective pocket 16. The recess 24 extends along the circumferential direction.

[0048] The recess 24 or the inner contour of the recess 24 can, in particular, be designed to complement an outer contour of a chain link. Due to this complementary design, the recess 24 fixes the chain link received therein in a predetermined position. The complementary design of the recess 24 to at least a portion of the outer contour of a chain link enables the chain link to nestle against or into the recess 24 and thus enables the chain link to rest flatly. If the portion of the outer contour extends from one point on one bow of the chain link to a point on the other bow of the chain link, the pocket chain sprocket 1 can better absorb loads in the circumferential direction 4.

[0049] The remaining areas of the pocket 16 serve to guide the chain link as it enters the recess 24 and as it exits the recess 24.

[0050] The recess 24 can have a straight section 26 which extends, for example, in the circumferential direction 4. The straight section 26 receives a leg of a chain link during operation of the sprocket 1. The section 26 can extend straight in a tangential direction of the pocket sprocket 1. At one or both ends of the straight section 26 located in the circumferential direction 4, a curved or bent section 28 of the recess 24 can adjoin each other, which is designed to receive a bend of a chain link. At least a part of a curved section 28 can extend along a tooth flank and / or tooth root 30 of a tooth 18 delimiting the pocket 16 in the circumferential direction. Transversely to its longitudinal extent 32, the recess 24 or its cross section has a radius 34 which is equal to or preferably slightly smaller or has a slightly larger tolerance than the wire diameter 36 of a chain link.A depth 38 of the depression forming the recess 24 relative to the base 22 is preferably less than one eighth of the diameter 36 and preferably more than one tenth of the diameter 36. Transversely to the longitudinal extent 32, the recess 24 thus has a circular arc-shaped cross-section.

[0051] The curved section 28 is configured in the direction of the longitudinal extension 32 of the recess 24 following the shape of a protrusion 106, i.e., it is curved in the same way as the protrusion 10, for example, in the shape of a circular arc. In this configuration, the circle defined by the circular arc of the curved section 24 defines a plane that runs inclined both to a plane perpendicular to the axial direction 2. The angle of inclination 44 corresponds to the angle that the planes of the chain link are intended to assume when overrunning the pocket chain sprocket 1. Typically, this angle is between 30° and 60°, in particular 45°.

[0052] The recess 24 can be interrupted by a groove 46 extending transversely to the longitudinal extension 32 of the recess 24. The groove 46 can be arranged centrally between the two teeth 18 circumferentially defining a pocket 26. A base of the groove 46 is deeper than the base 22 of the pocket 26 in which the groove 22 is located. The groove 46 can also have a circular cross-section.

[0053] The groove 46 preferably extends in a direction transverse to the recess on both sides beyond the recess 24. It can extend to an axially facing tooth flank of the tooth 18 of the other row 14 that projects towards the pocket 26 in which the groove 46 is located. The groove 46 can extend outwards along the tooth flank in the radial direction 6. Alternatively or additionally, the groove 46 can extend outwards in the radial direction along a side wall 50 that delimits the pocket 26 in which the groove 46 is located in the axial direction 2. In particular, the groove 46 can therefore extend from a tooth 18 of the other row 14 to the side wall 50. The groove 46 preferably runs in a straight line with respect to the axial direction.

[0054] The chain holder 12 can be limited in the axial direction 2 on both sides by two parallel side walls 50.

[0055] The side walls 50 can project beyond the teeth 18 in the radial direction 6. The teeth 18 are each connected to the base 22 and a side wall 50. Between a tooth 18 and the side wall 50 opposite the tooth 18, there is a gap that is at least as wide in the axial direction as the wire diameter of the round steel chain 100.

[0056] A tooth 18 can continue outward along a side wall 50 in the radial direction 6 in the form of a projection 52. The projection 52 projects less far in the axial direction 2 toward the opposite side wall than the underlying tooth 18. The projection 52 guides the chain links 102 into the respective pocket early when they run onto the pocket chain wheel 1, before they have reached the base 22 or a tooth 18. In order to achieve guidance that is as wear- and noise-free as possible here as well, the inner contour of a pocket 26 on its side formed by a side wall 50 is preferably designed to complement the outer contour of a chain link 102.

[0057] A base 54 of a tooth 18 can widen inward in the radial direction 6 and in the axial direction 2 toward the nearest side wall 50 with as little impact as possible. The base 56 of a projection 52 can also widen toward the nearest side wall with as little impact as possible. Such a smooth widening is possible, for example, through transition radii or curvatures.

[0058] As can be seen from the section III-III along the center plane 58 of the chain holder 12 in Fig. 3, a tooth 18 of a row 14 extends beyond the center plane 58 to the other row 14 or into the opposite pocket 16 of the other row 14. At its end 22 pointing towards the other row 14, a tooth 18 can be thickened in the circumferential direction. For example, starting from the base 54 of a tooth 18 on a side wall 50, the material thickness of the tooth 18 measured in the circumferential direction 4 can initially decrease and then increase again towards the opposite side wall 50. The area with the smallest material thickness of a tooth 18 can be located approximately in the middle of its extension in the axial direction 2.

[0059] A thickening 60 can be created, for example, by two extensions 62 that extend away from each other in opposite directions in the circumferential direction 4. The end 22 of a tooth 18 thus has an approximately T-shaped cross-section in the radial direction 6, for example, in a tangential plane to the circumferential direction.

[0060] In the illustrated embodiment, the two rows 14 of the chain holder 12 are offset from each other in the circumferential direction 4 by one pitch of the round steel chain 100. This means that a tooth 18 of one row 14 is located centrally between two teeth 18 of the other row. In such a configuration, the groove 46 of a pocket 26 of one row can extend radially outward along the tooth 18 of the other row projecting into this pocket.

[0061] The pocket chain sprocket 1 is preferably machined and designed as a single piece, i.e., made from a monolithic body. The pocket chain sprocket 1 can be manufactured directly by a primary forming process, such as casting, or a forming process, such as forging. Alternatively or additionally, machining, such as machining, can be performed after the primary forming or forming process to prepare the pocket chain sprocket 1 in an operational form. The pocket chain sprocket 1 can be made of a composite material, a plastic, and / or a metal material.

[0062] While the pocket chain sprocket, as described above, is preferably designed for round steel chains, chains with other wire cross-sections, such as profile steel chains with at least some sections of a polygonal or non-circular cross-section, can also be used. Chains with link shapes that differ from those of round steel chains can also be used. For this purpose, only the shape of the pockets 16, the recess 24, and / or the teeth 18 must be adapted to the geometry of the chain links in each individual case.

[0063] Figs. 6 and 7 show another embodiment of a pocket chain sprocket 1. The pocket chain sprocket 1 does not have a recess 24 and is therefore somewhat easier to manufacture.

[0064] The base 22 of each pocket 16 is flat and, with a radius 110, merges into the side walls 50 and a dividing wall 112 between the pockets 16 of different rows 14. The radius 110 is in the range of approximately ± 50%, preferably approximately ± 20%, of the radius of the wire of the round steel chains for which the pocket sprocket 1 is intended to be used.

[0065] As in the previous embodiment, the teeth 18 project beyond the center plane 58 so that they project into the pocket 16 adjacent in the axial direction 2.

[0066] The partition wall 112, which in the embodiment described below can also be present in the preceding exemplary embodiment, preferably extends continuously between two pockets 16 lying next to one another in the axial direction 2, projecting radially outward beyond the base 22. A partition wall 112 can extend from one end 20 of a tooth 18 on one side of the center plane 58 to the end 20 of the adjacent tooth 18 in the circumferential direction 4 on the other side of the center plane 58. The partition wall separates the axially adjacent pockets 16 from one another. The partition wall 112 is concavely curved in the radial direction 6, so that it extends radially inward from one tooth 18 towards the base 22. Each tooth 18 of the pocket chain sprocket 1 can, likewise as in the preceding embodiment, have a run-on bevel 114 intended to guide the approaching chain link onto the tooth.The run-up bevel 114 runs from an outer side 116 of a tooth pointing outwards in the radial direction 6 to its end 20 pointing in the axial direction 2. The inclination of the run-up bevel 114 with respect to a radial plane running perpendicular to the axial direction 2 is between approximately 30° and 60°, while the end 20 of a tooth 18 runs parallel to the radial plane and then merges into the radius 110.

[0067] The partition wall 112 can extend along the tooth flanks 30 up to or almost up to the outer side 116 of a tooth, wherein the height of the partition wall 112 preferably decreases to zero in the direction toward the outer side 116 of a tooth 18, so that at the outer side 116, the partition wall 112 smoothly merges into the tooth 18, or its flank, or the pocket 16. As can be seen in Fig. 6, an axially facing side of the partition wall 112, which begins at the end 20 of a tooth 18, can end in the region of the tooth flank 30.

[0068] The width of the partition wall 112 preferably increases towards the teeth 18 at which it ends.

[0069] Finally, in the embodiment of Figs. 6 and 7, the side walls 50 project beyond the teeth 18 in the radial direction 6. A projection 52 as in the first embodiment is missing.

[0070] Reference symbol

[0071] 1 pocket chain wheel

[0072] 2 Axis / axial direction

[0073] 4 Circumferential direction

[0074] 6 radial direction

[0075] 8 axle stubs

[0076] 10 Center opening

[0077] 12 chain holder

[0078] 14 rows

[0079] 16 bag

[0080] 18 teeth

[0081] 20 End of a tooth

[0082] 22 Reason for a bag

[0083] 24 Deepening

[0084] 26 straight section of the depression

[0085] 28 curved section or curve section of the recess

[0086] 30 tooth flank

[0087] 32 Longitudinal extension

[0088] 34 radius

[0089] 36 wire diameters

[0090] 38 Depth of the depression

[0091] 40 circle

[0092] 42 District level

[0093] 44 inclination angles

[0094] 46 grooves

[0095] 50 side walls

[0096] 52 lead

[0097] 54 Base

[0098] 56 Base

[0099] 58 Center level

[0100] 60 thickening

[0101] 62 extension

[0102] 100 round steel chain

[0103] 102 chain links

[0104] 104 Leg 106 Bow

[0105] 108 Opening

[0106] 110 radius

[0107] 112 Partition wall 114 Ramp

[0108] 116 Outside of a tooth

Claims

Claims 1. Pocket chain wheel (1) for driving and / or deflecting a slanted link chain (100), with a groove-shaped chain receptacle (12) which runs circumferentially (4) and has two rows (14) of pockets (16) running in the circumferential direction (4), wherein a chain link (102) of the round steel chain (100) can be received in each pocket (16) and two pockets (16) of a row (14) which are adjacent in the circumferential direction (4) are each separated from one another by a tooth (18), and wherein a tooth (18) of a row (14) extends beyond an axial center plane (58) of the chain receptacle (12) in the direction of a pocket (16) of the other row (14).

2. Pocket chain wheel (1) according to claim 1, wherein at the bottom (22) of each pocket (16) there is a trough-shaped depression (24) which extends with its longitudinal extent (32) along the circumferential direction (4).

3. Pocket chain wheel (1) according to claim 1 or 2, wherein an end (22) of the tooth (18) pointing in the direction of the other row (14) is thickened in the circumferential direction (4).

4. Pocket chain wheel (1) according to claim 3, wherein the end (22) is thickened by two extensions (62) extending in opposite directions in the circumferential direction (4).

5. Pocket chain wheel (1) according to one of claims 1 to 4, wherein the recess (24) extends along the circumferential direction (4) from the one tooth (18) of a row (14) to the tooth (18) of the row (14) adjacent in the circumferential direction (4).

6. Pocket chain wheel (1) according to one of claims 1 to 5, wherein the recess (24) of a pocket (16) of a row (14) extends along a tooth flank (30) pointing in the circumferential direction (4) of a tooth (18) of the row (14) adjacent to the pocket (16).

7. Pocket chain wheel (1) according to claim 6, wherein the recess (24) extends on a tooth flank (24) both in the axial direction (2) and in the radial direction (6).

8. Pocket chain wheel (1) according to one of claims 1 to 7, wherein the recess (24) is crossed by a radially extending groove (46).

9. Pocket chain wheel (1) according to one of claims 1 to 8, wherein the recess (24) has a straight region (26) for receiving a leg (104) of a chain link (102), to which two curved sections (28) for receiving a respective bow (106) of the chain link (102).

10. Pocket chain wheel (1) according to one of claims 1 to 9, wherein the recess (24) has a circular segment-shaped cross-section transversely to its longitudinal extent, the radius (34) of which corresponds to at least half the wire diameter (36) of a chain link.

11. Pocket chain wheel (1) according to one of claims 1 to 10, wherein the chain receptacle (12) is axially delimited by two side walls (50) lying opposite one another in the axial direction, wherein the teeth (18) extend away from the base (22) of the two circumferentially adjacent pockets (24) and from the side wall (50) delimiting these two pockets (24) in the axial direction (2).

12. Pocket chain wheel (1) according to claim 11, wherein the side walls (50) project beyond the teeth (18) in the radial direction (6).

13. Pocket chain wheel (1) according to claim 11 or 12, wherein a tooth (18) of a row (14) continues in the radial direction (6) outwards on the side wall (50) closest to the row (14) as a projection which projects less far from the side wall (50) in the axial direction towards the other row (14) than the tooth (18).

14. Pocket chain wheel (1) according to claim 13, wherein the tooth (18) and / or the projection widens inwardly in the axial direction (2) towards a side wall and / or in the radial direction (6).

15. Arrangement with a round steel chain (100) and a pocket chain wheel (1) according to one of claims 1 to 14 for deflecting and / or driving the round steel chain (100).

Images