A stern roller

Abstract

The utility model relates to a stern cylinder, including coaxial setting center axis, cylinder, the both ends of center axis, bearing of bearing are equipped with, the both ends of center axis are connected with the both ends of cylinder through the bearing of being equipped, the both ends of center axis extend out cylinder and are connected with ship body, cylinder rotates around center axis under external force effect. Advantageous effect is: the bearing, center axis are integrated in cylinder, can realize directly hoisting after manufacturing, need not other assembly splicing procedure, when need maintenance and repair, directly hoist cylinder, effectively improved the efficiency of installation, maintenance, repair, simultaneously, improved the fault tolerance of worker installation.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, specifically a stern roller. Background Technology

[0002] Traditional stern rollers typically employ different installation methods, such as bearing cap + bearing housing (half-type), bench-type, and semi-enclosed bushing type. The conventional bearing cap + bearing housing (half-type) installation offers high stability and convenient installation, but its bearing sealing is poor, maintenance cycles are short, and repair and replacement are difficult. The bench-type installation requires two bases, increasing installation and construction difficulty and occupying significant ship space. The semi-enclosed bushing type requires two watertight compartments for the maintenance of the bushing and bearing, negatively impacting design, installation, and ship space utilization.

[0003] Therefore, there is an urgent need for a stern roller structure with good sealing performance and easy installation. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a stern roller that eliminates the need for assembly and splicing processes and improves the error tolerance rate of workers during installation.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a stern roller, comprising a central shaft and a cylinder body arranged coaxially;

[0006] Bearings are fitted at both ends of the central shaft, and the central shaft is connected to both ends of the cylinder through the bearings at both ends;

[0007] The cylinder extends from both ends of the central axis and is connected to the hull; the cylinder rotates around the central axis under the action of external force.

[0008] As a further technical solution, sealing shaft covers are provided at both ends of the cylinder; the sealing shaft covers are sleeved on the central shaft and together with the cylinder to form a sealed cylinder structure;

[0009] The bearing is located inside the sealed cylindrical structure.

[0010] As a further technical solution, the central shaft includes a first shaft body, a second shaft body, and a third shaft body connected in sequence; the bearing is sleeved on the first shaft body and the third shaft body, and is connected to the cylinder through the bearing;

[0011] The second shaft body is a hollow structure, while the first shaft body and the third shaft body are both solid structures.

[0012] As a further technical solution, U-shaped bases are provided at both ends of the central shaft; the U-shaped bases are fixedly installed on the hull.

[0013] The two ends of the central shaft are fitted into the corresponding U-shaped base slots.

[0014] As a further technical solution, both ends of the central shaft are provided with cut surfaces that fit and abut against the inner wall of the bayonet.

[0015] As a further technical solution, a limiting component is also included. The limiting component is fixedly connected to the two side walls of the U-shaped base by a pin, and the bottom of the limiting component abuts against the upper surface of the end of the central shaft.

[0016] As a further technical solution, a second through hole is provided on the side wall of the cylinder, and the second through hole is connected to the interior of the bearing through a pipe for adding lubricating oil into the bearing.

[0017] As a further technical solution, the longitudinal section of the U-shaped base is U-shaped, and the upper part of the inner sidewall of the U-shaped base is provided with an outwardly inclined slope a.

[0018] The beneficial effects of this utility model are: the cylinder body integrates bearings and a central shaft, which can be directly hoisted after manufacturing without other assembly and splicing processes. When maintenance and repair are required, the cylinder body can be directly hoisted, which effectively improves the efficiency of installation, maintenance and repair, and at the same time increases the error tolerance of workers during installation.

[0019] This utility model integrates the cylinder, bearing, central shaft, and pipe as a whole, avoiding the need for component positioning and installation during on-site construction and installation, ensuring the coaxiality of the bearing, central shaft, and cylinder, and improving installation accuracy;

[0020] Installing pipes inside the cylinder allows lubricating oil to be injected into the bearing, thus extending its service life. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a stern roller according to the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of a stern roller according to the present invention, after removing the cylinder body and a pipe;

[0023] Figure 3 , Figure 4 These are three-dimensional structural schematic diagrams of the central axis of this utility model from different perspectives;

[0024] Figure 5 This is a three-dimensional structural diagram of the U-shaped base of this utility model;

[0025] Figure 6 This is a three-dimensional schematic diagram of a stern roller according to the present invention after removing part of its structure;

[0026] Figure 7 This is a schematic diagram of a structure in which a stopper is installed on a stern roller according to the present invention.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] Central axis 1, first axis body 11, cross surface 111, second axis body 12, third axis body 13;

[0029] 2. Cylinder body; 3. Bearing; 4. Longitudinal reinforcing plate; 5. Annular reinforcing plate; 6. Sealing shaft cover; 7. U-shaped base; 71. Bayonet; 8. Pipe; 9. Limiting component; 91. Pin. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0033] Example 1

[0034] See Figure 1 , Figure 2This embodiment provides a stern roller, including a central shaft 1 and a cylindrical body 2 coaxially arranged; bearings 3 are sleeved at both ends of the central shaft 1, and the central shaft 1 is connected to both ends of the cylindrical body 2 through the bearings 3 at both ends; the two ends of the central shaft 1 extend out of the cylindrical body 2 and are connected to the hull; the cylindrical body 2 rotates around the central shaft 1 under the action of external force. This structure is complete when shipped from the factory and can be directly hoisted without on-site assembly, making installation convenient.

[0035] For example, if the bearing 3 is a ball bearing 3, then the outer ring of the ball bearing 3 is fixedly connected to the inner wall of the cylinder 2, and the inner ring of the ball bearing 3 is fixedly connected to the outer wall of the central shaft 1, so that the central shaft 1 does not rotate during the rolling process of the cylinder 2.

[0036] See Figure 5 The cylinder 2 has several longitudinal reinforcing plates 4 arranged along the axial direction, and several annular reinforcing plates 5 arranged along the axial direction. The annular reinforcing plates 5 are arranged around the circumference of the cylinder 2 and are fitted around the central shaft 1. The arrangement of the longitudinal reinforcing plates 4 and the annular reinforcing plates 5 improves the load-bearing capacity of the cylinder 2, reduces the weight of the overall structure, and ensures the flexibility of rotation.

[0037] See Figure 1 , Figure 2 , Figure 6 In this specific implementation, the cylindrical body 2 described in this embodiment is provided with sealing shaft covers 6 at both ends; the sealing shaft covers 6 are sleeved on the central shaft 1 and together with the cylindrical body 2 form a sealed cylindrical structure; the bearing 3 is located inside this sealed cylindrical structure; that is, the cylindrical body 2, the central shaft 1, the bearing 3, and the sealing shaft covers 6 are integrated as a whole and shipped as a single unit, allowing for direct hoisting upon arrival without any other assembly or splicing processes, resulting in high installation and maintenance efficiency, as well as good sealing performance. (See also...) Figures 2-4 It should be noted that the central shaft 1 includes a first shaft body 11, a second shaft body 12, and a third shaft body 13 connected in sequence; the bearing 3 is sleeved on the first shaft body 11 and the third shaft body 13, and is connected to the cylinder 2 through the bearing 3; furthermore, the second shaft body 12 is a hollow structure, while the first shaft body 11 and the third shaft body 13 are solid structures. This structural design reduces weight while improving sufficient support.

[0038] It should be noted that the cylindrical body 2 extends from the end of the first shaft body 11 and the third shaft body 13 that is away from the second shaft body 12, which facilitates later installation. The first shaft body 11 and the third shaft body 13 have the same structure and are symmetrically arranged at both ends of the second shaft body 12, so that when the stern roller is working in this embodiment, the cylindrical body 2 rotates while the central shaft 1 does not rotate.

[0039] See Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 In the specific implementation process, both ends of the central shaft 1 in this embodiment are provided with U-shaped bases 7, and the U-shaped bases 7 are fixedly installed on the hull. Both ends of the central shaft 1 are adapted to be locked in the corresponding slots 71 of the U-shaped bases 7.

[0040] For example, the portions of the central shaft 1 extending out of the cylindrical body 2 are fitted into the slots 71 of the corresponding U-shaped base 7. Correspondingly, for example, both ends of the central shaft 1 are provided with cut surfaces 111 that fit and abut against the inner wall of the slots 71 to improve the stability of the central shaft 1 during installation. For example, the cut surfaces 111 are oblong to fit and connect with the slots 71 of the corresponding U-shaped base, thus preventing the central shaft 1 from shaking in the U-shaped base 7 during operation.

[0041] It should be noted that the U-shaped base 7 is installed on the hull. Therefore, during hoisting, it is only necessary to hoist the formed sealed cylinder structure into the U-shaped base 7 for installation. Furthermore, the upper part of the inner side wall of the U-shaped base 7 is provided with an outwardly inclined slope 'a' to facilitate the insertion of the central shaft 1. It should also be noted that the U-shaped base 7 is welded to the corresponding work position on the hull. When replacement or repair is required, the formed sealed cylinder structure can be hoisted out of the U-shaped base 7 for subsequent operations, improving the error tolerance of the workers during installation.

[0042] See Figure 1 , Figure 2 In the specific implementation process, a second through hole is provided on the side wall of the cylinder 2. The second through hole is connected to the interior of the bearing 3 through the pipe 8 for adding lubricating oil into the bearing 3. The filled lubricating oil can play a good sealing and barrier role, which can ensure that the interior of the cylinder will not be corroded by seawater and improve the corrosion resistance of this utility model.

[0043] For example, the inlet of the pipe 8 is equipped with a suitable bolt, which allows lubricating oil to be added to the bearing 3 at any time as needed, which can be easily achieved without any other operations.

[0044] It should be noted that the cylinder 2, the central shaft 1, the sealing shaft cover 6, and the bearing 3 are coaxial and integrated into one unit, ensuring coaxiality and thus reducing the complexity of subsequent installation. The material and specific structure of the cylinder 2 can be determined based on the ship's operating conditions and dimensions.

[0045] See Figure 7 In the specific implementation process, a limiting component 9 is also included. The limiting component 9 is fixedly connected to the two side walls of the U-shaped base 7 through a pin 91, and the bottom of the limiting component 9 abuts against the upper surface of the end of the central shaft 1, so that during installation, the pin 91 is inserted into the mounting hole on the corresponding side of the U-shaped base 7 (that is, at this time, the inner wall of the long side of the U-shaped base 7 is provided with a mounting hole). In actual use, when the cylinder 2 is installed on the U-shaped base 7, the bottom edge of the limiting component 9 is opposite to the surface of the central shaft 1. At the same time, due to the design of the pin 91, the limiting component 9 can be fixedly connected to the U-shaped base 7, thereby preventing the stern roller from jumping upward out of the U-shaped base 7 during operation.

[0046] After the pin 91 is inserted into the corresponding mounting hole, it can be fixed to the side wall of the U-shaped base 7 by means of a nut.

[0047] This embodiment is implemented as follows:

[0048] The U-shaped base 7 is embedded and welded to the bulkhead of the hull structure, and the opening of the U-shaped base 7 can be installed vertically upward or tilted towards the stern.

[0049] When the sealing cylinder 2, which is enclosed by the sealing shaft cover 6, the cylinder 2, and the central shaft 1, is installed as a whole on the U-shaped base 7, the installation is completed by: the two ends of the first shaft body 11 and the third shaft body 13, which have cut surfaces 111, being fixed in the slots 71 of the U-shaped base 7. When working, the cylinder 2 rotates, while the central shaft 1 does not rotate.

[0050] To improve stability, the limiting member 9 can be installed on the U-shaped base 7 to prevent the cylinder 2 from jumping off the U-shaped base 7.

[0051] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0052] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0053] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A stern roller, characterized in that, Includes a coaxially arranged central shaft (1), a cylindrical body (2), and a limiting component (9); The two ends of the central shaft (1) are fitted with bearings (3), and the central shaft (1) is connected to the two ends of the cylinder (2) through the bearings (3) provided at both ends. The two ends of the central shaft (1) extend out of the cylinder (2) and are connected to the hull; the cylinder (2) rotates around the central shaft (1) under the action of external force; Both ends of the central shaft (1) are provided with U-shaped bases (7); The limiting member (9) is fixedly connected to the two side walls of the U-shaped base (7) by a pin (91), and the bottom of the limiting member (9) abuts against the upper surface of the end of the central shaft (1).

2. A stern roller according to claim 1, characterized in that, The two ends of the cylinder (2) are provided with sealing shaft covers (6); the sealing shaft covers (6) are sleeved on the central shaft (1) and together with the cylinder (2) form a sealed cylinder structure; The bearing (3) is located inside the sealed cylinder structure.

3. A stern roller according to claim 1, characterized in that, The central shaft (1) includes a first shaft body (11), a second shaft body (12), and a third shaft body (13) connected in sequence; the bearing (3) is sleeved on the first shaft body (11) and the third shaft body (13), and is connected to the cylinder (2) through the bearing (3); The second shaft body (12) is a hollow structure, while the first shaft body (11) and the third shaft body (13) are both solid structures.

4. A stern roller according to claim 2, characterized in that, The U-shaped base (7) is fixedly installed on the hull; The two ends of the central shaft (1) are fitted into the slots (71) of the corresponding U-shaped base (7).

5. A stern roller according to claim 4, characterized in that, Both ends of the central shaft (1) are provided with cut surfaces (111) that are adapted to and abut against the inner wall of the bayonet (71).

6. A stern roller according to claim 1 or 2, characterized in that, A second through hole is provided on the side wall of the cylinder (2), and the second through hole is connected to the interior of the bearing (3) through the pipe (8) for adding lubricating oil into the bearing (3).

7. A stern roller according to claim 4, characterized in that, The upper part of the inner side wall of the U-shaped base (7) is provided with an outwardly inclined slope a.

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