Lower gearbox body for ship, propelling mechanism and steering oar

Abstract

The utility model discloses a marine lower gearbox body which comprises a body, an inner cavity is formed in the body, a bearing supporting seat is arranged in the inner cavity and comprises a bearing seat and connecting tables, the connecting tables are located on the two sides of the bearing seat, one end of each connecting table is connected with the bearing seat, and the other end of each connecting table is connected with the bearing seat. And the other end of the connecting table is connected to the inner wall of the inner cavity. According to the lower gearbox body for the ship, the bearing supporting seat is arranged in the inner cavity of the box body in advance, an independent bearing seat part can be omitted, the bearing supporting seat and the power input port are machined and formed together, and the concentricity is high; the bearing seat is supported by two points, so that the stability is better; and the bearing supporting seat is arranged on the inner wall of the box body, so that the strength of the box body is further enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rudder propellers, and in particular relates to a lower gear box body for a ship, and a propulsion mechanism and a rudder propeller comprising the lower gear box body for a ship. Background Art

[0002] The existing marine lower gearbox housing has no fixed bearing seat inside, and generally a bearing seat extending downward is set at the power input port on the top. Since the upper end is fixed and the lower end has no reinforced connection, it is a single-point support, resulting in the bearing seat and the bearing being not stable enough. Summary of the invention

[0003] In view of this, the utility model provides an improved marine lower gearbox housing, wherein a fixed bearing support seat is preset inside the housing, which is more stable.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A marine lower gearbox housing comprises a main body, an inner cavity is formed in the main body, a bearing support seat is arranged in the inner cavity, the bearing support seat comprises a bearing seat and a connecting platform, the connecting platform is located on both sides of the bearing seat, one end of the connecting platform is connected to the bearing seat, and the other end of the connecting platform is connected to the inner wall of the inner cavity.

[0006] According to some preferred implementation aspects of the utility model, the top of the body has a first connection platform for connecting to the steering column, the first connection platform is provided with a power input port that is connected to the inner cavity, and the axis of the power input port coincides with the axis of the bearing seat. That is, the bearing seat and the power input port are coaxially arranged and can be processed and formed together, with high concentricity.

[0007] According to some preferred implementation aspects of the utility model, the body has a second connection platform for connecting with the connecting portion of the catheter, and the second connection platform is symmetrically distributed on both sides of the body. Symmetrical distribution means uniform force, which is conducive to the support of the catheter.

[0008] According to some preferred implementation aspects of the utility model, the second connecting platform is elliptical, and the length of the major semi-axis of the elliptical second connecting platform is 3.4-3.6 times the length of the minor semi-axis. The flat elliptical setting has smaller water flow resistance.

[0009] According to some preferred implementation aspects of the utility model, the main body has a third connecting platform for connecting to a bearing seat of a propeller, and a circular power output port is provided on the third connecting platform, and the power output port is communicated with the inner cavity.

[0010] According to some preferred implementation aspects of the utility model, an extension line of a projection line formed by the projection of the major axis of the elliptical second connecting platform on the third connecting platform passes through the center of the circular power output port.

[0011] According to some preferred implementation aspects of the utility model, the angle between the projection line formed by the projection of the long axis of the elliptical second connecting platform on the third connecting platform and the vertical direction is 45-75°. Such a setting can further reduce the resistance of the water flow, more effectively support the conduit, and improve stability.

[0012] According to some preferred implementation aspects of the utility model, the main body has a fourth connecting platform for connecting with the guide cap.

[0013] According to some preferred implementation aspects of the utility model, an observation port penetrating the bottom wall thickness is provided at the bottom of the body, and the boss of the observation port faces the inner cavity to make the outside flat and reduce water flow resistance. The observation port is also used as an oil drain port.

[0014] The utility model also provides a marine lower gearbox housing propulsion mechanism and a steering propeller as described above.

[0015] Compared with the prior art, the utility model is advantageous in that: the marine lower gearbox housing of the utility model can save separate bearing seat parts by presetting a bearing support seat in the inner cavity of the housing; the bearing support seat is processed and formed together with the power input port, and has high concentricity; the bearing seat is supported at two points, and has better stability; and the bearing support seat is arranged on the inner wall of the housing, which further enhances the strength of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the rudder propeller in the preferred embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the side view structure of the rudder propeller in the preferred embodiment of the utility model;

[0019] Figure 3 , Figure 4 They are the three-dimensional structural schematic diagrams of the marine lower gearbox housing at different viewing angles;

[0020] Figure 5 for Figure 4 Sectional view of AA in the middle;

[0021] Figure 6 This is a schematic diagram of the side structure of the box in the preferred embodiment of the utility model;

[0022] Among them: rudder propeller-1, propulsion mechanism-2, lower gear box body-3, straight part-31, arc part-32, guide cap-4, main body-5, inner cavity-6, bearing support seat-7, bearing seat-71, connecting platform-72, first connecting platform-81, power input port-811, second connecting platform-82, third connecting platform-83, power output port-831, fourth connecting platform-84, observation port-85, conduit-9, connecting part-91, steering column-10, well box-11, upper gear box-12, propeller-13. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] like Figure 1-6 As shown, the rudder propeller 1 in this embodiment includes a propulsion mechanism 2, which includes an upper gearbox 12, a well box 11, a rudder column 10, a lower gearbox, a guide cap 4, a propeller 13 and a guide tube 9. The housing 3 of the marine lower gearbox in this embodiment includes a body 5, an inner cavity 6 is provided in the body 5, and a bearing support seat 7 is provided in the inner cavity 6. The bearing support seat 7 includes a bearing seat 71 and a connecting platform 72. The connecting platform 72 is located on both sides of the bearing seat 71, one end of the connecting platform 72 is connected to the bearing seat 71, and the other end of the connecting platform 72 is connected to the inner wall of the inner cavity 6. By presetting the bearing support seat 7 in the inner cavity 6 of the housing, a separate bearing seat 71 part can be omitted; when the gearbox is processed, the bearing support seat 7 is processed and formed together with the power input port 811, and the concentricity is high; the bearing seat 71 is supported at two points, and the stability is better; and the bearing support seat 7 is arranged on the inner wall of the housing, which further enhances the strength of the housing.

[0025] like Figure 2 As shown, the lower gear box housing 3 in this embodiment is streamlined in shape, elliptical water drop, and has low water flow resistance. Specifically, from the side, it includes a straight portion 31 and an arc portion 32, wherein the arc portion 32 and the guide cap 4 together form an elliptical portion. Such a setting further reduces water flow resistance.

[0026] The body 5 has a first connection platform 81 for connecting to the steering column 10, a second connection platform 82 for connecting to the connection part 91 of the duct 9, a third connection platform 83 for connecting to the bearing seat 71 of the propeller 13, a fourth connection platform 84 for connecting to the guide cap 4, and an observation port 85 that penetrates the bottom wall thickness. The first connection platform 81, the second connection platform 82, the third connection platform 83, and the fourth connection platform 84 are respectively located at the top, side, rear, and front of the box. The boss of the observation port 85 faces the inner cavity 6 to make the outside flat and reduce the water flow resistance. The observation port 85 is also used as an oil drain port.

[0027] The first connecting platform 81 is provided with a power input port 811 which is connected to the inner cavity 6, and the axis of the power input port 811 coincides with the axis of the bearing seat 71. That is, the bearing seat 71 and the power input port 811 are coaxially arranged and can be processed and formed together, with high concentricity.

[0028] The second connecting platform 82 is symmetrically distributed on both sides of the body 5, and is evenly stressed, which is beneficial to the support of the conduit 9. The second connecting platform 82 is elliptical, and the length of the major semi-axis of the elliptical second connecting platform 82 is 3.4-3.6 times the length of the minor semi-axis. The flat elliptical setting has smaller water flow resistance.

[0029] A circular power output port 831 is provided on the third connection platform 83, and the power output port 831 is connected to the inner cavity 6. The extension line of the projection line formed by the projection of the long axis of the elliptical second connection platform 82 on the third connection platform 83 passes through the center of the circular power output port 831. And the angle between the projection line and the vertical direction is 45-75°. Such a setting can further reduce the resistance of the water flow, more effectively support the conduit 9, and improve stability. In this embodiment, the preferred angle between the projection line and the vertical direction is 60°, such as Figure 6 shown.

[0030] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A marine lower gearbox housing, It is characterized in that It includes a main body, an inner cavity is opened in the main body, a bearing support seat is arranged in the inner cavity, the bearing support seat includes a bearing seat and a connecting platform, the connecting platform is located on both sides of the bearing seat, one end of the connecting platform is connected to the bearing seat, and the other end of the connecting platform is connected to the inner wall of the inner cavity.

2. The marine lower gearbox housing according to claim 1, It is characterized in that The top of the main body is provided with a first connection platform for connecting with a steering column, and a power input port penetrating the inner cavity is provided on the first connection platform, and the axis center line of the power input port coincides with the axis center line of the bearing seat.

3. The marine lower gearbox housing according to claim 1, It is characterized in that The main body is provided with a second connection platform for connecting with the connection part of the catheter, and the second connection platforms are symmetrically distributed on both sides of the main body.

4. The marine lower gearbox housing according to claim 3, It is characterized in that The second connecting platform is elliptical, and the length of the major semi-axis of the elliptical second connecting platform is 3.4-3.6 times the length of the minor semi-axis.

5. The marine lower gearbox housing according to claim 4, It is characterized in that The main body is provided with a third connection platform for connecting with a bearing seat of a propeller, and a circular power output port is provided on the third connection platform, and the power output port is communicated with the inner cavity.

6. The marine lower gearbox housing according to claim 5, It is characterized in that An extension line of a projection line formed by the projection of the major axis of the elliptical second connecting platform on the third connecting platform passes through the center of the circular power output port.

7. The marine lower gearbox housing according to claim 5 or 6, It is characterized in that The angle between the projection line formed by the projection of the major axis of the elliptical second connecting platform on the third connecting platform and the vertical direction is 45-75°.

8. The marine lower gearbox housing according to claim 1, It is characterized in that The main body is provided with a fourth connecting platform for connecting with the guide cap.

9. A propulsion mechanism, It is characterized in that It comprises a marine lower gearbox housing as described in any one of claims 1 to 8.

10. A steering propeller, It is characterized in that It comprises a marine lower gearbox housing as described in any one of claims 1 to 8.

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