Ship tail shaft mounting device

Abstract

The utility model discloses a ship stern shaft installation device which comprises a stern tube and a guide sliding block installed in the stern tube, the guide sliding block is configured to be used for bearing a stern shaft and can slide between a first position and a second position in the stern tube, and the guide sliding block is provided with an avoiding channel for avoiding a fixing support in the stern tube. The stern shaft is supported by the guide sliding block at the first position, and the stern shaft is guided by the guide sliding block to move in the axis direction of the stern tube so that the stern shaft can be installed in the stern tube in a traction mode. The problems that the stern shaft is prone to being scratched in the tube penetrating process and the tube penetrating efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of ship equipment installation technology, and in particular to a ship stern shaft installation device. Background Technology

[0002] Traditionally, the stern tube of small and medium-sized vessels consists of hubs at both ends, with a seamless steel pipe welded in the middle. However, in shafting systems requiring bearing temperature measurement, a mounting bracket is welded to the seamless steel pipe section to protect the cable conduit for the bearing temperature sensor. The hubs are welded to the stern structure of the hull, and the bearings are pre-installed inside the hubs. After the bearings are adjusted, the stern tube is finally hoisted and inserted into the stern tube. Inserting the stern tube requires careful and meticulous handling; otherwise, the stern tube can easily be scratched by the mounting bracket inside. If the stern tube is scratched, it must be removed and repaired. If the scratch is severe and the shipowner refuses repair, a new stern tube must be manufactured or procured, delaying the ship's construction and causing significant economic losses. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a ship stern shaft installation device to solve the problems of easy scratching of the stern shaft and low efficiency of pipe insertion during the pipe insertion process.

[0004] This utility model is achieved using the following technical solution:

[0005] A ship stern shaft mounting device includes a stern tube and a guide slider installed inside the stern tube. The guide slider is configured to support the stern shaft and slide between a first position and a second position inside the stern tube. The guide slider has a clearance channel to avoid a fixed bracket inside the stern tube. The stern shaft is supported by the guide slider at the first position, and the guide slider guides the stern shaft to move along the axial direction of the stern tube to pull and install the stern shaft in the stern tube.

[0006] Furthermore, the second position is provided with an adsorption member for adsorbing the guide slider. When the guide slider slides to the second position, it is adsorbed by the adsorption member to lock the guide slider in the second position.

[0007] Furthermore, the adsorption element is a neodymium iron boron magnet.

[0008] Furthermore, the guide slider has a supporting arc surface adapted to the outer surface of the stern shaft.

[0009] Furthermore, the supporting arc surface is provided with a pad that matches its curvature.

[0010] Furthermore, the end of the gasket has a rounded chamfer.

[0011] Furthermore, the gasket is made of rubber and has a thickness of 2-3 mm.

[0012] Furthermore, the guide slider includes a support foot and a support portion disposed on the support foot, the support foot and the support portion being combined to form the clearance channel, the height of the clearance channel being greater than the height of the fixed bracket.

[0013] Furthermore, a first camera is provided on the inner side of the support leg, and a second camera is provided on the outer side of the support leg.

[0014] Furthermore, the first and second cameras are electrically connected to a display screen.

[0015] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0016] This invention utilizes a guide slider to guide the stern shaft's movement within the stern tube. The guide slider serves as a guide and positioner, providing continuous and accurate guidance for the stern shaft. This ensures the stern shaft enters the stern tube smoothly and accurately, effectively preventing it from shifting or shaking during insertion and damaging the stern tube, thus improving installation efficiency. Furthermore, the guide slider's support and clearance design isolate the fixed support, preventing scratches on the stern shaft during insertion and effectively protecting it. Attached Figure Description

[0017] Figure 1 This is one of the sectional views of the ship stern shaft mounting device according to an embodiment of this utility model;

[0018] Figure 2 This is a second sectional view of the ship stern shaft mounting device according to an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the guide slider according to an embodiment of the present utility model;

[0020] Figure 4 This is one of the schematic diagrams of the stern shaft passing through the stern tube according to an embodiment of this utility model;

[0021] Figure 5 This is the second schematic diagram of the stern shaft passing through the stern tube according to an embodiment of the present utility model;

[0022] Figure 6 This is the third schematic diagram of the stern shaft passing through the stern tube according to an embodiment of this utility model;

[0023] Figure 7 This is a schematic diagram showing the connection between the display screen and the first camera in an embodiment of this utility model;

[0024] In the diagram: 1. Stern tube; 11. Adsorption component; 12. Fixed bracket; 13. Front axle hub; 14. Intermediate steel pipe; 15. Rear axle hub; 2. Guide slider; 21. Support leg; 22. Support part; 23. Gasket; 24. Clearance passage; 25. First camera; 3. Display screen; 4. Stern shaft; 5. Cable protection pipe. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0026] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0027] like Figures 1 to 7 As shown, this utility model provides a ship stern shaft 4 installation device, including a stern tube 1 and a guide slider 2 installed inside the stern tube 1. The guide slider 2 is configured to support the stern shaft 4 and can slide between a first position and a second position inside the stern tube 1. The guide slider 2 has a clearance channel 24 to avoid the fixed bracket 12 inside the stern tube 1. The stern shaft 4 is supported by the guide slider 2 at the first position. The guide slider 2 guides the stern shaft 4 to move along the axial direction of the stern tube 1 so as to pull and install the stern shaft 4 in the stern tube 1.

[0028] In this embodiment, the stern tube 1 is assembled from the front axle hub 13, the intermediate steel tube 14 and the rear axle hub 15. The intermediate steel tube 14 is equipped with a fixed bracket 12 for the cable protection pipe 5 to pass through. The guide slider 2 is installed in the intermediate steel tube 14. Since the guide slider 2 has an avoidance channel 24 to avoid the fixed bracket 12, the fixed bracket 12 does not interfere with the sliding of the guide slider 2 in the intermediate steel tube 14.

[0029] Specifically, the process of inserting the stern shaft 4 into the stern tube 1 is as follows: the guide slider 2 is placed on the rear end face of the intermediate steel pipe 14, the stern shaft 4 is lifted to the rear end face of the rear axle hub 15 of the stern tube 1, and then extends horizontally into the stern tube 1. The front end of the stern shaft 4 presses on the guide slider 2, and then the stern shaft 4 is pushed. Under the action of the gravity of the stern shaft 4 and the human push, the guide slider 2 slides forward until the guide slider 2 slides to the second position and stops moving. The stern shaft 4 is continued to be pushed until it reaches the designated position of the stern tube 1, thereby pulling and installing the stern shaft 4 into the stern tube 1.

[0030] This invention utilizes a guide slider 2 to guide the stern shaft 4 in the stern tube 1. The guide slider 2 serves as a guide and positioner, continuously and accurately guiding the stern shaft 4 so that it can enter the stern tube 1 smoothly and accurately. It also effectively prevents the stern shaft 4 from shifting or shaking during the insertion process, thus preventing damage to the stern tube 1 and improving the installation efficiency of inserting the stern shaft 4 into the stern tube 1. On the other hand, the design of the guide slider 2 supporting the stern shaft 4 and avoiding the passage 24 isolates the fixed bracket 12 from the guide slider 2, thus preventing the stern shaft 4 from being easily scratched by the fixed bracket 12 during the insertion process and effectively protecting the stern shaft 4.

[0031] In a preferred embodiment, the second position is provided with an adsorption member 11 for adsorbing the guide slider 2. When the guide slider 2 slides to the second position, it is adsorbed by the adsorption member 11 to lock the guide slider 2 in the second position.

[0032] In this embodiment, after the stern shaft 4 is fully installed in the stern tube 1, in order to prevent the guide slider 2 from affecting the rotation of the stern shaft 4 in the later stage, the guide slider 2 is fixed by adsorption by the adsorption member 11 and locked in the second position. This can prevent the guide slider 2 from sliding in the stern tube 1 in the later stage and affecting the operation of the stern shaft 4.

[0033] In a preferred embodiment, the adsorption element 11 is a neodymium iron boron magnet. Using a neodymium iron boron magnet to adsorb the guide slider 2 ensures its long-term stable adsorption of the guide slider 2 due to the long service life of neodymium iron boron magnets.

[0034] In a preferred embodiment, the guide slider 2 has a supporting arc surface that matches the outer surface of the stern shaft 4. By designing the supporting arc surface, it can adapt to the shape of the stern shaft 4, thus enabling the guide slider 2 to stably support the stern shaft 4 and prevent stern shaft 4 from wobbling.

[0035] In a preferred embodiment, the supporting arc surface is provided with a shim 23 adapted to its curvature. Through the contact between the shim 23 and the stern shaft 4, the shim 23 can both increase the frictional resistance between the guide slider 2 and the stern shaft 4 and protect the stern shaft 4.

[0036] In a preferred embodiment, the end of the gasket 23 has a rounded chamfer. This prevents the gasket 23 from scratching the stern shaft 4.

[0037] In a preferred embodiment, the gasket 23 is made of rubber, and its thickness is 2-3 mm. The rubber gasket 23 has high corrosion resistance and good cushioning performance. When the end of the stern shaft 4 presses against the guide slider 2, the gasket 23 provides a certain cushioning effect, protecting the stern shaft 4. The 2-3 mm thickness of the gasket 23 provides excellent cushioning and support.

[0038] In a preferred embodiment, the guide slider 2 includes a support leg 21 and a support portion 22 disposed on the support leg 21. The support leg 21 and the support portion 22 are combined to form the clearance channel 24, and the height of the clearance channel 24 is greater than the height of the fixed bracket 12.

[0039] In this embodiment, the support legs 21 of the guide slider 2 span both sides of the fixed bracket 12, that is, the fixed bracket 12 is located within the clearance channel 24, and the top of the fixed bracket 12 does not contact the support portion 22, thus avoiding interference of the fixed bracket 12 with the sliding of the guide slider 2. Since the support portion 22 is located above the fixed bracket 12, the stern shaft 4 presses on the support portion 22, and the fixed bracket 12 passes through the clearance channel 24, making it less likely for the stern shaft 4 to be scratched by the fixed bracket 12 during the pipe insertion process.

[0040] In a preferred embodiment, a first camera 25 is provided on the inner side of the support leg 21, and a second camera is provided on the outer side of the support leg 21.

[0041] In this embodiment, during the insertion of the stern shaft 4 through the tube, if the speed is too high, the guide slider 2 may sway left and right, potentially damaging the fixed bracket 12 in the stern tube 1. To solve this problem, a first camera 25 is installed on the inner side of the support leg 21 to observe whether the support leg 21 touches the fixed bracket 12. A second camera displays the internal condition of the stern tube 1, allowing the operator to see the internal environment of the stern tube 1, further improving the insertion efficiency of the stern shaft 4. When the guide slider 2 reaches the neodymium iron boron magnet, the second camera can be used to observe whether the guide slider 2 is attracted to the neodymium iron boron magnet.

[0042] In a preferred embodiment, the first camera 25 and the second camera are electrically connected to the display screen 3. In this embodiment, the first camera 25 and the second camera feed back the collected images to the display screen 3 in real time. The operator can adjust the shaft insertion method according to the image displayed on the display screen 3, further improving the installation efficiency of the stern shaft 4. When the stern shaft 4 is removed later for maintenance or other reasons, the display screen 3, the first camera 25, and the second camera can be used to remove the stern shaft 4 smoothly and quickly.

[0043] In addition, this utility model also provides the construction sequence of the device:

[0044] Step 1: Install and weld the fixing bracket 12 into the intermediate steel pipe 14 of the stern tube 1;

[0045] Step 2: The front axle hub 13 and the rear axle hub 15 are welded to the intermediate steel tube 14;

[0046] Step 3: Perform a full pressure test on stern tube 1;

[0047] Step 4: The stern tube 1 is placed on the slipway as a whole and positioned in the hull structure according to the drawings, and supported with adjusting bolts;

[0048] Step 5: After adjusting the stern tube 1 into position and confirming that the position is qualified, pour epoxy into the gap between the front axle hub 13 / rear axle hub 15 of the stern tube 1 and the hull structure.

[0049] Step 6: Machining the guide slider 2, and installing the first camera 25 and the second camera onto the guide slider 2.

[0050] Step 7: Place the assembled guide slider 2 into the rear end of the intermediate steel pipe 14;

[0051] Step 8: Insert the stern shaft 4 from back to front. The stern shaft 4 is lifted to the rear end face of the rear axle hub 15 of the stern tube 1 and inserted horizontally into the stern tube 1. After the stern shaft 4 presses against the guide slider 2, push the stern shaft 4 forward. Under the action of the gravity of the stern shaft 4 and the human push, the guide slider 2 slides forward. While inserting the stern shaft 4, observe the gap between the guide slider 2 and the fixed bracket 12 through the display screen 3 to ensure that the guide slider 2 does not touch the fixed bracket 12. Continue inserting the stern shaft 4 until the guide slider 2 reaches the suction member 11 at the rear end face of the front axle hub 13. The guide slider 2 stops moving and is suctioned on the suction member 11. Continue inserting the stern shaft 4 until the theoretical position is reached.

[0052] 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 alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A marine vessel stern shaft mounting arrangement, characterised in that, The application relates to a stern tube (1) and a guide slider (2) installed in the stern tube (1), the guide slider (2) is configured to support a stern shaft (4) and can slide between a first position and a second position in the stern tube (1), the guide slider (2) has an avoiding channel (24) avoiding a fixed support (12) in the stern tube (1), the stern shaft (4) is supported by the guide slider (2) in the first position, the guide slider (2) guides the stern shaft (4) to move along the axis direction of the stern tube (1) to install the stern shaft (4) in the stern tube (1).

2. A marine stern shaft mounting arrangement according to claim 1, characterised in that, The second position is provided with a suction member (11) for adsorbing the guide slider (2), the guide slider (2) is adsorbed by the suction member (11) when sliding to the second position to lock the guide slider (2) in the second position.

3. A marine stern shaft mounting arrangement according to claim 2, characterised in that, The suction member (11) is a neodymium iron boron magnet.

4. The marine stern shaft mounting arrangement of claim 1, wherein, The guide slider (2) has a supporting camber surface matched with the outer surface of the stern shaft (4).

5. A marine stern shaft mounting arrangement according to claim 4, characterised in that, The supporting camber surface is provided with a gasket (23) matched with the camber surface.

6. A marine stern shaft mounting arrangement according to claim 5, characterised in that, The end of the gasket (23) is provided with a circular arc chamfer.

7. The marine stern shaft mounting arrangement of claim 5, wherein, The gasket (23) is made of rubber, and the thickness of the gasket (23) is 2-3 mm.

8. The marine stern shaft mounting apparatus of claim 1, wherein, The guide slider (2) comprises a supporting leg (21) and a supporting part (22) arranged on the supporting leg (21), the supporting leg (21) and the supporting part (22) are combined to form the avoiding channel (24), and the height of the avoiding channel (24) is greater than the height of the fixed support (12).

9. A marine stern shaft mounting arrangement according to claim 8, characterised in that, The inner side of the supporting leg (21) is provided with a first camera (25), and the outer side of the supporting leg (21) is provided with a second camera.

10. A marine stern shaft mounting arrangement according to claim 9, characterised in that, The first camera (25) and the second camera are electrically connected with a display screen (3).

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