Propeller and rudder shaft connecting structure

Abstract

The utility model relates to the technical field of marine propellers, and discloses a propeller and rudder shaft connecting structure which comprises an external thread connector welded to a propeller shell. The rudderpost is sleeved with the internal thread connector, the internal thread connector is matched with the external thread connector, and a wrench space and a bolt head are machined on the outer circumference of the internal thread connector; the joint sealing piece is used for sealing a mounting gap between the internal thread joint and the external thread joint; a boss is arranged at the lower end of the rudder shaft and used for limiting the upper end of the internal thread connector and bearing the weight of the propeller. The utility model aims to provide a propeller rain rudder shaft connecting structure which is small in size, light in weight and capable of effectively reducing the upstream area when a ship is propelled, reducing the water resistance and improving the propelling efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of marine propellers, in particular to a connecting structure of a propeller and a rudder shaft. Background Art

[0002] The ship's propeller is generally connected to the rudder shaft so that the thrust generated when it is working acts on the ship through the rudder shaft, thereby propelling the ship to sail in the water. Figure 1 It is a common propeller connection method in the prior art. It sets a mounting flange 2 on the top of the propeller and a matching flange 3 on the lower end of the rudder shaft 1, and then uses bolts to tighten and seals to achieve the connection between the propeller and the rudder shaft. This connection structure requires space for the arrangement of bolts and the use of wrenches. Therefore, the flange used has a large diameter and a high height, which makes the overall volume of the connection structure large and the weight heavy. During the operation of the propeller, the flange has a large water-facing area and a large water resistance, thereby reducing the propulsion efficiency of the propeller. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and provide a propeller and rudder shaft connection structure, which is small in size and light in weight, can effectively reduce the waterfront area during ship propulsion, reduce water resistance, and improve propulsion efficiency.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a propeller and rudder shaft connection structure, including: an external threaded joint, welded on the propeller housing; an internal threaded joint, sleeved on the rudder shaft and matched with the external threaded joint, and having a wrench space and a bolt head processed on its outer circumference; a joint seal, used to seal the installation gap between the internal threaded joint and the end face of the rudder shaft; a boss is provided at the lower end of the rudder shaft, which is used to limit the upper end of the internal threaded joint and bear the weight of the propeller.

[0005] As an improvement, the joint seal is a sealing ring, and the external threaded joint and / or the rudder shaft end face are provided with a sealing groove. When the internal threaded joint is connected to the external threaded joint, the sealing ring is pressed into the sealing groove to keep the connection surface in a sealed state.

[0006] As an improvement, a connecting plate is welded on the thruster housing, the height direction of the connecting plate is parallel to the axis of the external threaded joint, and the width direction coincides with the diameter direction of the external threaded joint. A clamp is installed on the rudder shaft, and after the clamp clamps the rudder shaft, its open end is fixed to the connecting plate.

[0007] As an improvement, at least one first positioning hole is formed at the open end of the clamp, and a second positioning hole is formed at a position on the connecting plate corresponding to the first positioning hole.

[0008] As an improvement, the rudder shaft and the external threaded joint are both hollow structures, and the lower end of the external threaded joint is connected to the inside of the propeller.

[0009] As an improvement, a cable connector base is installed on the end surface of the external threaded joint to fix the cable connector.

[0010] As an improvement, sealing rings are provided between the external threaded joint and the bottom surface of the cable connector and between the upper surface of the cable connector and the lower end surface of the rudder shaft.

[0011] Combined with the above technical solutions, compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model provides a propeller and rudder shaft connection structure, which adopts a threaded joint connection method instead of a flange connection. The installation space is arranged along the axial direction and is within the length range of the rudder shaft itself. There is no need to increase the installation space additionally. Therefore, the installation and fixation can be completed within a smaller diameter, thereby reducing the volume and weight of the installation structure and the waterfront area during ship propulsion, reducing water resistance and improving propulsion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the installation structure of a propeller and a rudder shaft in the prior art.

[0014] Figure 2 The utility model is a structural schematic diagram of a propeller and a rudder shaft connection structure.

[0015] Figure 3 It is an exploded view of a propeller and rudder shaft connection structure described in the utility model.

[0016] Figure 4 This is a schematic diagram of the installation position of the cable connector described in the utility model

[0017] Wherein: 1-external threaded joint, 11-sealing groove, 2-rudder shaft, 21-boss, 3-internal threaded joint, 4-clamp, 41-first positioning hole, 5-connecting plate, 51-second positioning hole, 6-thruster, 7-cable connector base, 71-sealing groove, 8-cable connector, 9-sealing ring. DETAILED DESCRIPTION

[0018] In order to explain the technical features and the achieved purposes and effects of the present invention in detail, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Please refer to the attached Figure 2-4A propeller and rudder shaft connection structure, including an external threaded joint 1 welded on the propeller housing and an internal threaded joint 3 sleeved on the rudder shaft 2, the internal threaded joint 3 is matched with the external threaded joint 1, a wrench space and a bolt head are processed on the outer circumference of the internal threaded joint 3, and a joint seal is provided between the end face of the internal threaded joint 3 and the end face of the rudder shaft 2; a boss 21 is provided at the lower end of the rudder shaft 2, which is used to limit the upper end of the internal threaded joint 3 and bear the weight of the propeller 6.

[0020] In the above embodiment, when installing the propeller 6, it is only necessary to place the joint seal on the end face of the external threaded joint 1, and then tighten the internal threaded joint 3 on the external threaded joint 1 with a wrench. At this time, the lower end face of the rudder shaft 2 and the end face of the external threaded joint 1 press the joint seal to achieve sealing. Since the wrench space and the bolt head are located on the internal threaded joint 3, the installation space is within the length range of the rudder shaft 2 itself during installation, so there is no need to increase the installation space, so that the propeller 6 and the rudder shaft 2 can be installed and fixed within a smaller diameter, thereby reducing the volume and weight of the installation structure and the frontal area of ​​the ship during propulsion, reducing water resistance, and improving propulsion efficiency.

[0021] Preferably, the joint seal is a sealing ring 9, and a sealing groove 11 is provided on the end face of the external threaded joint 1 and / or the rudder shaft 2. When the internal threaded joint 3 is connected to the external threaded joint 1, the sealing ring 9 is pressed into the sealing groove 11 to put the connection surface in a sealed state.

[0022] In the above embodiment, a sealing ring 9 is used to seal between the external threaded joint 1 and the rudder shaft 2, which has a low cost. A sealing groove 11 is provided on the end surface of the external threaded joint 1 and / or the rudder shaft 2 to perform preliminary positioning of the sealing ring 9 during installation, thereby facilitating the installation of the sealing ring 9.

[0023] Preferably, a connecting plate 5 is welded on the outer shell of the propeller 6, the height direction of the connecting plate 5 is parallel to the axis of the external threaded joint 1, and the width direction coincides with the diameter direction of the external threaded joint 1, and a clamp 4 is installed on the rudder shaft 2, and the open end of the clamp 4 is fixed on the connecting plate 5 after the rudder shaft 2 is clamped.

[0024] In the above embodiment, the connecting plate 5 is connected to the rudder shaft 2 through the clamp 4. When the propeller 6 is working, it can bear part of the thrust and weight, thereby reducing the stress at the threaded joint and ensuring the stability of the connection.

[0025] Preferably, at least one first positioning hole 41 is formed at the open end of the clamp 4 , and a second positioning hole 51 is formed at a position on the connecting plate 5 corresponding to the first positioning hole 41 .

[0026] In the above embodiment, the clamp 4 and the connecting plate 5 are positioned and installed through the first positioning hole 41 and the second positioning hole 51. Exemplarily, the clamp 4 and the connecting plate 5 are connected by bolts.

[0027] Preferably, the rudder shaft 2 and the external threaded joint 1 are both hollow structures, and the lower end of the external threaded joint 1 is connected to the inside of the propeller 6.

[0028] In the above embodiment, the hollow rudder shaft 2 and the external threaded joint 1 can further reduce the weight and provide a wire passing space for the connecting cables of the propeller 6.

[0029] Preferably, a cable connector base 7 is installed on the end face of the external threaded joint 1 for connecting a cable connector 8. For example, a threaded hole can be processed on the end face of the external threaded joint 1, and the cable connector base 7 can be fixed to the external threaded joint 1 by threaded connection.

[0030] In the above embodiment, the cable connector base 7 is fixed to the end surface of the external threaded connector 1 and is integrated with the thruster 6 to facilitate the disassembly and replacement of the thruster 6 .

[0031] Preferably, a sealing ring 9 is provided between the end face of the external threaded joint 1 and the bottom surface of the cable connector base 7, and between the upper surface of the cable connector base 7 and the lower end surface of the rudder shaft 2. Exemplarily, a sealing groove 71 is provided on the upper surface of the cable connector base 7, and a sealing groove 11 is provided on the upper surface of the external threaded joint 1.

[0032] In the above embodiment, a sealing ring 9 is arranged between the end face of the external threaded joint 1 and the bottom face of the cable connector base 7 and between the upper surface of the cable connector base 7 and the lower end face of the rudder shaft 2 to ensure the sealing of the inner cavity of the connection structure and play a waterproof role.

[0033] It should be noted that the various embodiments in the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0034] The utility model and its implementation methods are described in detail above, and such description is not restrictive. The drawings show only some implementation methods of the utility model, and the actual structure is not limited thereto. Ordinary technicians in this field can be inspired by it and make various modifications, improvements and substitutions without departing from the concept of the utility model, which should all belong to the protection scope of the utility model.

Claims

1. A propeller and rudder shaft connection structure, characterized in that: include: External threaded connector, welded to the thruster housing; An internal threaded joint, which is sleeved on the rudder shaft and matched with the external threaded joint, and has a wrench space and a bolt head processed on its outer circumference; Joint seal, used to seal the installation gap between the internal thread joint and the rudder shaft; A boss is provided at the lower end of the rudder shaft, which is used to limit the upper end of the internal thread joint and bear the weight of the propeller.

2. A propeller and rudder shaft connection structure according to claim 1, characterized in that: The joint seal is a sealing ring, and the external thread joint and / or the rudder shaft end surface are provided with a sealing groove. When the internal thread joint is connected to the external thread joint, the sealing ring is pressed in the sealing groove to make the connection surface in a sealed state.

3. The propeller and rudder shaft connection structure according to claim 1, characterized in that: A connecting plate is welded on the thruster housing, the height direction of the connecting plate is parallel to the axis of the external threaded joint, and the width direction coincides with the diameter direction of the external threaded joint. A clamp is installed on the rudder shaft, and the open end of the clamp is fixed on the connecting plate after the rudder shaft is clamped.

4. A propeller and rudder shaft connection structure according to claim 3, characterized in that: At least one first positioning hole is formed at the open end of the clamp, and a second positioning hole is formed at a position on the connecting plate corresponding to the first positioning hole.

5. The propeller and rudder shaft connection structure according to claim 1, characterized in that: The rudder shaft and the external threaded joint are both hollow structures, and the lower end of the external threaded joint is connected to the inside of the propeller.

6. A propeller and rudder shaft connection structure according to claim 5, characterized in that: A cable connector base is installed on the end surface of the external threaded joint for connecting a cable connector.

7. A propeller and rudder shaft connection structure according to claim 6, characterized in that: Sealing rings are arranged between the external thread joint and the bottom surface of the cable connector base, and between the upper surface of the cable connector base and the lower end surface of the rudder shaft.

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