• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A sprocket (1) for a sprocket (2) with one sprocket, each sprocket being formed of substantially two parallel parts (3, 3 ') of a circular cross section. These are interconnected via two semi-circular parts (4, 4 ') with a corresponding circular cross-section, such that each chain link defines a plane (f) where the chain links are mutually engaged so that the chain links are mutually displaceable in three dimensions, which sprocket has an outer diameter and comprising: a center aperture (5) for engagement with a shaft; two circular parallel flanges (6) between which the chain links can be mounted. In addition, a plurality of chain bearings (7) for engagement with chain links arranged with the flat plane substantially perpendicular to the radius of the sprocket, each sprocket bearing, each having a symmetry axis (s') coinciding with a radius of the sprocket; a plurality of teeth (8) each having a axis of symmetry (s') coinciding with a radius of the sprocket, which teeth are each disposed between two chain bearings (7) and for engagement between two chain links. The teeth and chain bearings are formed in the two flanges so that they lie symmetrically about a central face plane perpendicular to the center opening and the chain bearings are each formed with a concave face (9) and include a convex face (10) where there is a sliding transition between the concave surface of the bearing and the convex surface of the teeth, and the transition between the concave surface of the bearing and the convex surface of the teeth is arranged on the sprocket such that the transition (11) forms at least part of a contact surface to the outer surface of a chain member.
    公开号:DK201570386A1
    申请号:DKP201570386
    申请日:2015-06-23
    公开日:2017-01-16
    发明作者:Ole Christiansen；Ivan Seistrup
    申请人:Maersk Supply Service As；Dacmatech As；
    IPC主号:
    专利说明:

    Sprockets
    Description Introduction
    BACKGROUND OF THE INVENTION The invention relates to a sprocket for a chain with a similar sprocket, wherein each sprocket is formed of substantially two parallel parts with a circular cross-section, interconnected via two semi-circular portions having a corresponding circular cross-section, such that each sprocket defines a plane plane. wherein the warp joints are mutually engaged so that the warp joints are mutually displaceable in three dimensions, said sprocket having an outer diameter and comprising: a center opening for engagement with a shaft; two circular parallel flanges between which the chain links can be mounted; a plurality of chain bearings for engagement with chain links arranged with the plane of plane substantially perpendicular to the radius of the sprocket, each sprocket bearing, each having a axis of symmetry coinciding with a radius of the sprocket; a plurality of teeth, each having a tooth axis of symmetry coinciding with a radius of the sprocket, which teeth are each disposed between two chain bearings and for engagement between two chain links; which teeth and chain bearings are formed symmetrically about a central plane perpendicular to the center aperture. When drilling vessels are to be anchored by e.g. drilling installations on the seabed are often carried out with the help of so-called supply boats, which assist in the laying of anchors and anchor chains. These anchor chains may be made of braided wire or they may be made as articulated chains where the individual joints are mutually engaged with the neighboring joints so that the chain joints are also mutually movable in three dimensions. These chain links are also made symmetrical about central longitudinal axes. These chains with joints are especially used where the chain has to hold considerable forces, sometimes several thousand but up to millions of newtons.
    This, of course, involves risks and therefore special equipment is used to operate these chains. To pull the chains, so-called sprockets are used, which are made with hollows which can engage the chain link. Typically, the sprockets are designed such that the individual holes engage the chain links so that the joints located in holes are oriented with the center of mass located centrally in the hole and with the central longitudinal axis of the chain located perpendicular to the radius of the sprocket. The invention relates to such a sprocket.
    The object of the invention is to provide a sprocket where the sprocket can be operated with a higher degree of safety, even if the chain is produced with small variations.
    This object is achieved in that the chain bearings, each one, are formed with a concave surface and wood; the teeth, each comprising a convex surface, wherein there is a sliding transition between the concave surface of the bed and the convex surface of the teeth, and by; that the transition between the concave surface of the bearing and the convex surface of the teeth is arranged on the sprocket such that the transition forms at least part of a contact surface to the outer surface of a chain.
    By designing the chain bearings such that the chain link is held in the sprocket by forces which, essentially, act in the longitudinal direction of the chain link, and this is true even if the chain link is not quite the same, the chain link thereby being only slightly higher or slightly deeper in the chain link. the chain bearings (holes), but still with the front contact surface lying in the transition between the concave and convex part. As a result, the sprocket is not "vulnerable" to variations in the chain links.
    This construction causes the chain links to lock in the sprocket so that it is possible to pull the chain in or out without it '' jumping a tooth '', ie. release its engagement with the sprocket. The chain is thus fixed in the sprocket and therefore there is further reduced risk of the chain releasing its engagement. In one embodiment, the sprocket is configured such that the convex surface of the teeth is formed such that a geometric locking of chain links arranged in the sprocket chain bearings is obtained. In one embodiment, the teeth are formed symmetrically about the radius of the sprocket and further so that the transition between the convex portion and the concave portion occurs at the position where the teeth extend perpendicular to the above mentioned radius.
    By shaping the teeth with a convex surface such that the chain positions itself with the joints of the holes in such a way that the contact surface is in the transition between the convex and concave part of the tooth, it is achieved that the one end of the chain joints is geometrically locked to this transition part of the teeth. the other end of the chain links easily releases its engagement when the chain exits the sprocket. In one embodiment, the sprocket is formed such that the convex surface of the teeth and the concave surface comprise a contact surface. The contact surface - which is the area where the front or rear of the chain comes into contact with the teeth of the sprocket when the chain is in a hole - can advantageously be designed to extend parallel to the radius extending longitudinally of the tooth and in the axis of symmetry of the tooth. (tandsymetriaksen).
    This results in a geometric locking of the chain. In one embodiment, the sprocket is designed such that the sprocket bearings are aligned with a chain's semicircular round parts so that the sprocket bearings include a contact surface formed as part of a circle and wherein the circular convex surface provides a better geometric locking of sprocket joints located at the sprocket sprocket.
    By designing the contact surface as part of a circle, a larger contact surface is obtained, thereby distributing the forces between chain and sprocket correspondingly over a larger area, which in part implies better retention, but also that the surface pressure (pressure / area) becomes smaller and thereby increases durability. of both chain and sprocket. In one embodiment, the sprocket is configured so that the chain bearings are aligned with a chain's semicircular round portions such that the chain bearings comprise a contact surface formed in the transition between the concave and convex portion, which contact surface is a portion of a circle and wherein the convex surface provides a geometric lock of chain links placed in the chain bearings of the sprocket. By designing the sprocket with both a circular contact surface and a convex surface, a precise bearing of the chain links in the holes is obtained, while the chain links are not '' pressed 'out of the holes during use. In one embodiment, the sprocket is designed such that the sprocket bearings are adapted to a semi-circular circular portion of the sprocket so that the sprocket bearings comprise a circular contact surface, a convex surface extending substantially parallel to the circular contact surface with a geometric locking of the sprocket sprocket chain bearing. . By allowing the convex surface to extend parallel to the circular contact surface, it is achieved that the convex surface can provide retention, also on the circular part. In one embodiment, the sprocket is formed such that the teeth are formed with a tip. This design ensures that the chain links slide better into the sprocket holes. In one embodiment, the sprocket is formed such that the teeth are formed with a tip constituting a pointed angle. By shaping the teeth with a tip constituting an acute angle, the chain links slide better into place, but at the same time also slide better out of engagement when the chain has to leave the sprocket. In one embodiment, the sprocket is formed such that the teeth are formed with a tip which constitutes blunt angle. The blunt angle ensures increased strength at the tip of the tooth. In one embodiment, the sprocket is formed such that the sprocket comprises 6 teeth. By designing the sprocket this way achieves great durability and safety. In the text, the term '' tooth '' is used, this should not be construed as a point that engages the individual joints. An '' tooth ', on the other hand, engages the individual joints in the chain so that the forces between the chain and sprocket are preferably transferred onto the outer surface of the chain links. This is unlike the forces transmitted from one chain link to another or between the individual links of the chain, these forces being transmitted via the inner surface of the chain links. In the text, the term chain bearings and hollows is used, this is for linguistic and explanatory reasons, but the terms cover the same technical features and there is technically no difference.
    Furthermore, the terms: '' convex surface which results in geometric locking '' are combined with the word: locking surface. These two concepts also cover the same technical features and there is usually no technical difference. The term also uses the term dental symmetry axis, these are the lines of symmetry or axis of symmetry extending from the center of the sprocket and up along the center of each tooth. Thus, each tooth is formed substantially symmetrically about a '' tooth symmetry axis ''. In the text, the word "sprockets" is also used, such sprockets also have other names such as: wildcat, cabillary wheel or anchor winch and the invention is not limited to any of these, but may be applied to any sprocket made with teeth thus that a chain can engage the teeth in such a way that the teeth are inserted between two chain links.
    The words "essentially" cover the variations that will naturally occur when a person skilled in the art works without being inventive. Typically, these are minor adjustments, but the word can also cover the variations that occur as a result of an inaccurate production.
    The invention will be explained in more detail in the following description, with reference to the drawing, in which figure 1 shows an embodiment of a sprocket according to the invention, figure 2 shows an embodiment of a sprocket with a chain in engagement. Figure 1 shows a sprocket (1) for a sprocket (2) having preferably the same chain link. The sprocket itself is shown in direction of rotation (R) in Figure 1.
    Each chain link is formed of - essentially - two parallel portions (3, 3 ') of a circular cross-section that are interconnected via two semi-circular portions (4, 4') of a corresponding circular cross-section. Thus, each chain link defines a flat plane (f). The chain links are mutually engaged so that the chain links are mutually displaceable in three dimensions.
    The sprocket itself (1) has an outer diameter and comprises: a center opening (5) for engagement with a shaft. The sprocket is formed with two circular parallel flanges (6) between which the chain links can be mounted (only one flange is shown in Figure 1, but both (6.6 ') can be seen in Figure 2). To retain the individual chain links, the sprocket is provided with a plurality of chain bearings (7) and the chain links are arranged therein so that they lie with the flat plane substantially perpendicular to the radius of the sprocket. The chain bearings are each formed with a axis of symmetry (s') which coincides with a radius of the sprocket.
    In addition, the sprocket has a plurality of teeth (8), each of which has a axis of symmetry (s) coinciding with a radius of the sprocket, i.e., the axis of symmetry extends through the center of the sprocket. The sprocket teeth - which are usually 5 or more are - each, arranged between two chain bearings (7) and for engagement between two chain links, both teeth and chain bearings are formed in the two flanges so that they are symmetrical about a central plane (not shown in the figures) perpendicular to the center opening .
    To ensure retention of the chain bearings, the chain bearings are each formed as hollows with a concave surface (9) and, furthermore, the teeth are each also provided with a convex surface (10) and there is a sliding transition between the concave surface and the convex surface. The convex portion and the concave portion are positioned so that the transition (11) may comprise at least a portion of a contact surface to the outer surface of a chain member. Or, as can be seen best in Figure 2, the transitions / contact surfaces are located where the distance (D1) between two chain links located on either side of a tooth is the least.
    The invention is directed to sprockets, where the tensile forces can typically be 600 tonnes, which are transferred to the displayed chain 3. The chain is therefore of a very large dimension, e.g. 6 inches (approx. 15.5 cm) and the sprocket 2 are therefore similarly heavy and typically weigh in the region of 9 tons.
    It is quite common for a chain's chain link to not be exactly the same and this creates dangerous situations as - especially at high loads - it happens that the chain simply jumps off the sprocket and popularly says' 'run wild'.
    By means of the sprocket according to the invention, these inaccuracies in chains can be compensated as the sprocket locks the chain in the sprocket geometrically. This prevents the risk of damage at sea, while at the same time costly chains that would otherwise have to be discarded can be used without any increased risk of injury to persons or equipment.
    权利要求:
    Claims (10)
    [1]
    A sprocket (1) for a sprocket (2) with one sprocket, each sprocket formed of substantially two parallel parts (3, 3 ') with a circular cross-section interconnected via two semi-circular parts (4) , 4 ') having a corresponding circular cross-section such that each chain link defines a face plane (f) wherein the chain links are mutually engaged so that the chain links are mutually displaceable in three dimensions, said sprocket having an outer diameter and comprising: • a center aperture ( 5) for engagement with a shaft; Two circular parallel flanges (6) between which the chain links can be mounted; A plurality of chain bearings (7) for engagement with chain links arranged with the flat plane substantially perpendicular to the radius of the sprocket, each sprocket bearing, each having a axis of symmetry (s') coinciding with a radius of the sprocket; A plurality of teeth (8), each having a axis of symmetry (s) coincident with a radius of the sprocket, which teeth are each disposed between two chain bearings (7) and for engagement between two chain links; • which teeth and chain bearings are formed in the two flanges so that they lie symmetrically around a central surface plane perpendicular to the center opening, characterized by • that the chain bearings, each, are formed with a concave surface (9) and • that the teeth, each comprises a convex surface (10) wherein there is a sliding transition between the concave surface of the bearing and the convex surface of the teeth, and: • that the transition between the concave surface of the bearing and the convex surface of the teeth is arranged on the sprocket such that the transition (11) constitutes the at least a portion of a contact surface to the outer surface of a chain member.
    [2]
    A sprocket according to claim 1, characterized in that the convex surface (10) of the teeth is formed such that a geometric locking of chain links arranged in the sprocket bearings of the sprocket is obtained.
    [3]
    A sprocket according to claim 1 and / or 2, characterized in that the convex surface of the teeth and the concave surface comprise a contact surface (11) extending substantially parallel to the radius of the sprocket.
    [4]
    A sprocket according to any one of the preceding claims, characterized in that the chain bearings are adapted to a semi-circular round part (4,4 ') of the chain so that the chain bearings comprise a contact surface formed as part of a circle.
    [5]
    A sprocket according to claim 4, characterized in that the sprocket bearings are adapted to a semi-circular circular portion of a sprocket so that the sprocket bearings comprise a contact surface formed as part of a circle and wherein a convex surface causes a geometric locking of sprocket joints arranged in the sprocket sprocket bearings.
    [6]
    A sprocket according to any one of the preceding claims, characterized in that the sprocket bearings are adapted to a semi-circular circular portion of a sprocket such that the sprocket bearings comprise a contact surface formed in the transition between the concave and convex portion, which contact portion is part of a circle.
    [7]
    A sprocket according to any one of the preceding claims, characterized in that the teeth are formed with a tip.
    [8]
    A sprocket according to any one of the preceding claims, characterized in that the teeth are formed with a tip constituting a pointed angle.
    [9]
    A sprocket according to any one of the preceding claims, characterized in that the teeth are formed with a tip which forms a blunt angle.
    [10]
    A sprocket according to any one of the preceding claims or combinations thereof, characterized in that the sprocket comprises 6 teeth.
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    同族专利:
    公开号 | 公开日
    DK178896B1|2017-05-08|
    DK201570386A9|2017-01-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB648940A|1948-08-31|1951-01-17|Yale & Towne Mfg Co|Improvements in idler sheaves for chain blocks and the like|
    GB1070645A|1963-07-23|1967-06-01|King Ltd Geo W|Improvements in or relating to sprocket wheels|
    CA1286923C|1987-05-12|1991-07-30|Ronald Ballantyne|Mechanism for tensioning a moving chain|
    NO316269B1|2000-12-11|2004-01-05|Maritime Pusnes As|Rotating jack winch|
    法律状态:
    2020-01-14| PBP| Patent lapsed|Effective date: 20190623 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201570386A|DK178896B1|2015-06-23|2015-06-23|CHAIN WHEELS|DKPA201570386A| DK178896B1|2015-06-23|2015-06-23|CHAIN WHEELS|
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