A thrust box for a marine electric power unit

Abstract

The utility model discloses a kind of thrust box for marine electric power unit, including box and thrust shaft component, the outer surface of box is arranged with multiple reinforcing ribs;Thrust shaft component passes through box, thrust shaft component includes first pressing plate, output flange, thrust shaft, input flange and second pressing plate, wherein, output flange and input flange are respectively coupled in the both ends of thrust shaft by spline, first pressing plate is installed in the one end of thrust shaft away from input flange, first pressing plate is used to the axial limit of output flange, second pressing plate is installed in the one end of thrust shaft away from output flange, output flange is used to the axial limit of input flange.The scheme is coupled by spline by being arranged in the both ends of thrust shaft respectively with input flange and output flange, effectively shorten axial length, overall arrangement is compact, by arranging reinforcing rib on the outer surface of box, it can increase heat dissipation area while increasing the strength of box, reduce temperature rise, to meet the use requirement without doing forced cooling.

Description

Technical Field

[0001] This utility model belongs to the field of marine power propulsion technology, and in particular relates to a thrust box for marine electric power units. Background Technology

[0002] Marine thrust boxes are designed to withstand the thrust of propellers. Conventional marine thrust boxes typically use diesel engines or diesel-electric hybrids for power input, with transmission through gears at various stages. Most of them use diesel engines for propulsion, while the rest use electric motors. However, these marine thrust boxes are large in size and have relatively complex power systems.

[0003] With the development of electric motors, thrust boxes are now used in conjunction with electric motors to form marine power units. Since the electric motor itself can output a relatively low speed sufficient for the propeller and can operate in both forward and reverse directions, a conventional gearbox is unnecessary; only the thrust box is needed to bear the propeller thrust. However, due to the limited space in the engine room's stern shaft, the volume of the thrust box needs to be minimized to save limited engine room space, improve space utilization, and reduce the complexity of the power system. Furthermore, because the engine room's stern shaft space is small, there is no space for forced cooling; therefore, the heat dissipation area of ​​the thrust box housing needs to be increased without requiring forced cooling. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a thrust box for marine electric power units that is suitable for bearing propeller thrust, has low temperature rise, compact layout, and high reliability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A thrust box for a marine electric propulsion unit includes a box body and a thrust shaft assembly. The outer surface of the box body is arranged with multiple crisscrossing reinforcing ribs. The thrust shaft assembly passes through the box body and includes a first pressure plate, an output flange, a thrust shaft, an input flange, and a second pressure plate. The output flange and the input flange are respectively connected to the two ends of the thrust shaft via splines. The first pressure plate is installed at the end of the thrust shaft away from the input flange and is used to axially limit the output flange. The second pressure plate is installed at the end of the thrust shaft away from the output flange, and the output flange is used to axially limit the input flange. Thus, by arranging splines at both ends of the thrust shaft to connect with the input and output flanges respectively, the axial length can be effectively shortened while maintaining the same transmission capacity. The overall arrangement is compact. The reinforcing ribs on the outer surface of the box body increase the strength of the box body while increasing the heat dissipation area and reducing temperature rise, thereby meeting the usage requirements without forced cooling.

[0007] Preferably, the middle part of the thrust shaft is supported on the housing by a first bearing and a second bearing, and both ends of the thrust shaft extend out of the housing.

[0008] Preferably, both the first and second bearings are tapered roller bearings. Tapered roller bearings have high axial and radial load-bearing capacity, thus enabling them to withstand the thrust or pull of the propeller when the motor rotates in both directions.

[0009] Preferably, the system also includes a first spacer and a second spacer. The first spacer is disposed on the thrust shaft and located between the first bearing and the output flange, while the second spacer is disposed on the thrust shaft and located between the second bearing and the input flange. The first spacer and the first pressure plate thereby limit and fix the output flange, and the clearance of the first bearing is adjusted by the first pressure plate and the first spacer. Similarly, the second spacer and the second pressure plate thereby limit and fix the input flange, and the clearance of the second bearing is adjusted by the second pressure plate and the second spacer.

[0010] Preferably, a first sealing ring is arranged at the junction of the first spacer and the output flange, and a second sealing ring is arranged at the junction of the second spacer and the input flange. This allows lubricating oil to reach the splined positions at both ends of the thrust shaft.

[0011] Preferably, a third sealing ring is arranged between the first spacer and the housing, and a fourth sealing ring is arranged between the second spacer and the housing.

[0012] Preferably, the third and fourth sealing rings are molded sealing rings.

[0013] Preferably, a fifth sealing ring is arranged at the junction of the output flange and the outer end of the thrust shaft, and a sixth sealing ring is arranged at the junction of the input flange and the outer end of the thrust shaft. This prevents lubricating oil from leaking along the splines from both ends of the thrust shaft.

[0014] Preferably, the outer surface of the enclosure is provided with multiple crisscrossing reinforcing ribs. This increases the enclosure's strength while also increasing the heat dissipation area and reducing temperature rise, thus meeting usage requirements without forced cooling.

[0015] This utility model, by adopting the above technical solution, has the following beneficial effects:

[0016] 1. In this utility model, by arranging splines at both ends of the thrust shaft to connect with the input flange and the output flange, the axial length of the thrust box is effectively shortened, saving the limited space of the engine room to the greatest extent, and it is suitable for various electric-powered ships with limited engine room space.

[0017] 2. The enclosure dissipates heat through air thermal radiation. By arranging crisscrossing reinforcing ribs on the surface of the enclosure, the strength of the enclosure is increased while the heat dissipation area is increased, reducing the temperature rise. This allows the enclosure to meet usage requirements without forced cooling. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0019] Figure 1 This is a schematic diagram of the transmission principle of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the box in this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure label:

[0024] 1. Housing; 11. Reinforcing rib; 101. First pressure plate; 102. Output flange; 103. Thrust shaft; 104. First bearing; 105. Second bearing; 106. Input flange; 107. Second pressure plate; 108. First spacer; 109. Second spacer; 1010. First sealing ring; 1011. Second sealing ring; 1012. Third sealing ring; 1013. Fourth sealing ring; 1014. Fifth sealing ring; 1015. Sixth sealing ring. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] like Figures 1 to 4As shown, this utility model discloses a thrust box for a marine electric power unit, including a box body 1 and a thrust shaft component. The thrust shaft component passes through the box body 1. Multiple crisscrossing reinforcing ribs 11 are arranged on the outer surface of the box body 1, thereby increasing the strength of the box body 1 while increasing the heat dissipation area of ​​the box body surface, reducing temperature rise. This allows the box body 1 to meet operating conditions even when dissipating heat through air radiation without forced cooling, improving space utilization and reliability, reducing the size of the thrust box, and saving engine room space. Specifically, the number and width of the reinforcing ribs 11 can be set according to actual conditions.

[0034] The thrust shaft assembly includes a first pressure plate 101, an output flange 102, a thrust shaft 103, an input flange 106, and a second pressure plate 107. The output flange 101 and the input flange 106 are splined to both ends of the thrust shaft 103. Compared to traditional tapered fit connections, splined connections allow for a shorter axial length while maintaining the same transmission capacity, resulting in a more compact overall thrust box arrangement. A motor is connected to the input flange 106 and supplies power to the thrust box. The propeller is connected to the output flange 101. Forward and reverse rotation of the motor enables forward and reverse propeller operation, and the propeller speed is controlled by controlling the motor's rotation speed. The first pressure plate 101 is bolted to the end of the thrust shaft 103 furthest from the input flange 106, and it serves to axially limit the output flange 102. The second pressure plate 107 is bolted to the end of the thrust shaft 103 furthest from the output flange 102, and it serves to axially limit the input flange 106.

[0035] like Figure 2 As shown, the middle part of the thrust shaft 103 is supported on the housing 1 by the first bearing 104 and the second bearing 105, and both ends of the thrust shaft 103 extend out of the housing 1. Specifically, in this solution, the first bearing 104 and the second bearing 105 are both tapered roller bearings.

[0036] In this design, the thrust box further includes a first spacer 108 and a second spacer 109. The first spacer 108 is disposed on the thrust shaft 103 and located between the first bearing 104 and the output flange 102. The second spacer 109 is disposed on the thrust shaft 103 and located between the second bearing 105 and the input flange 106. The first spacer 108 and the first pressure plate 101 are used to limit and fix the output flange 102, and the clearance of the first bearing 104 is adjusted by the first pressure plate and the first spacer. The second spacer and the second pressure plate are used to limit and fix the input flange, and the clearance of the second bearing is adjusted by the second pressure plate and the second spacer.

[0037] To ensure lubricating oil reaches the spline position, a first sealing ring 1010 is arranged at the junction of the first spacer 108 and the output flange 102, and a second sealing ring 1011 is arranged at the junction of the second spacer 109 and the input flange 106. This prevents leakage from the spline at the junction. In this design, the first sealing ring 1010 and the second sealing ring 1011 are O-rings. Similarly, to prevent lubricating oil from leaking along the spline from both ends of the thrust shaft, a fifth sealing ring 1014 is arranged at the junction of the output flange 102 and the outer end of the thrust shaft 101, and a sixth sealing ring 1015 is arranged at the junction of the input flange 106 and the outer end of the thrust shaft 101. In this design, the fifth sealing ring 1014 and the sixth sealing ring 1015 are O-rings.

[0038] A third sealing ring 1012 is arranged between the first spacer 108 and the housing 1, and a fourth sealing ring 1013 is arranged between the second spacer 109 and the housing 1. In this design, the third sealing ring 1012 and the fourth sealing ring 1013 are molded sealing rings.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A thrust box for a marine electric power unit, comprising a housing (1) and a thrust shaft assembly, wherein the thrust shaft assembly passes through the housing (1), characterized in that, The outer surface of the housing (1) is provided with a number of intersecting reinforcing ribs (11); the thrust shaft component includes a first pressure plate (101), an output flange (102), a thrust shaft (103), an input flange (106), and a second pressure plate (107). The output flange (102) and the input flange (106) are respectively connected to the two ends of the thrust shaft (103) by splines. The first pressure plate (101) is installed at the end of the thrust shaft (103) away from the input flange (106) and is used to axially limit the output flange (102). The second pressure plate (107) is installed at the end of the thrust shaft (103) away from the output flange (102) and is used to axially limit the input flange (106).

2. The thrust box for a marine electric power unit according to claim 1, characterized in that, The middle part of the thrust shaft (103) is supported on the housing (1) by the first bearing (104) and the second bearing (105), and the two ends of the thrust shaft (103) extend out of the housing (1).

3. A thrust box for a marine electric power unit according to claim 2, characterized in that, Both the first bearing (104) and the second bearing (105) are tapered roller bearings.

4. A thrust box for a marine electric power unit according to claim 2, characterized in that, It also includes a first spacer (108) and a second spacer (109). The first spacer (108) is disposed on the thrust shaft (103) and located between the first bearing (104) and the output flange (102). The second spacer (109) is disposed on the thrust shaft (103) and located between the second bearing (105) and the input flange (106).

5. A thrust box for a marine electric power unit according to claim 4, characterized in that, A first sealing ring (1010) is arranged at the junction of the first spacer (108) and the output flange (102), and a second sealing ring (1011) is arranged at the junction of the second spacer (109) and the input flange (106).

6. A thrust box for a marine electric power unit according to claim 4, characterized in that, A third sealing ring (1012) is arranged between the first spacer (108) and the housing (1), and a fourth sealing ring (1013) is arranged between the second spacer (109) and the housing (1).

7. A thrust box for a marine electric power unit according to claim 6, characterized in that, The third sealing ring (1012) and the fourth sealing ring (1013) are molded sealing rings.

8. A thrust box for a marine electric power unit according to claim 1, characterized in that, A fifth sealing ring (1014) is arranged at the junction of the output flange (102) and the outer end of the thrust shaft (103), and a sixth sealing ring (1015) is arranged at the junction of the input flange (106) and the outer end of the thrust shaft (103).

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