Propeller detacher

Abstract

The utility model provides a propeller detacher which comprises a plurality of strong screws, one end of each strong screw is fixedly installed on a threaded hole in the tail end of a propeller, the other end of each strong screw is provided with a seat plate in a limiting mode through a limiting nut, and a hydraulic jack is installed on the inner end face of the seat plate. The top end of a piston rod of the hydraulic jack is contacted with the end of the propeller shaft; the hydraulic jack is connected with a manual hydraulic pump through an oil pipe, and a pressing handle is arranged on the manual hydraulic pump. The detacher can be used for detaching the propeller, and by means of the thin split type hydraulic jack, the detaching efficiency is effectively improved, the detaching difficulty of the propeller is reduced, and the effect of saving time and labor is achieved.

Description

Technical Field

[0001] The utility model relates to the field of ship maintenance equipment, in particular to a propeller disassembler. Background Art

[0002] In the prior art, a general ship propeller is processed and manufactured with extremely high precision through a propeller hub with a cone and a propeller shaft with a cone, and the contact area is required to be more than 75%. During installation, a hydraulic nut or a general nut is used to screw in the propeller and install it on the tail shaft cone. During installation, in order to prevent the propeller from loosening during operation and affecting navigation safety, a force wrench or a hydraulic method is usually used to force the propeller to fit the propeller shaft with force and interference fit. Such a tight fit requires special tools and devices when the propeller is disassembled. In addition, the early and existing propellers of some small and medium-sized ships are still disassembled using the traditional old method, that is, the knocking method is still used to vibrate the propeller to loosen the propeller and the shaft to form a gap to disassemble the propeller.

[0003] Although the existing ship propeller disassembly also adopts the hydraulic nut method, in this method, a buffer plate and a hydraulic nut are fitted on the tail shaft screw, hydraulic oil is injected into the hydraulic nut through a manual hydraulic pump, and the propeller hub is pulled backward through the pressure plate and the double-headed screw, thereby separating the tail shaft and the propeller hub, and realizing propeller disassembly.

[0004] The advantages of the hydraulic method using hydraulic nuts are labor saving and time saving, while the disadvantages are high processing precision requirements, complex structure, and high price. It is adopted by large ships, and the propellers of small and medium-sized ships use the method of general nut propulsion propeller and propeller shaft tightly fitting. The method mentioned above is difficult to disassemble. Utility Model Content

[0005] In order to solve the current technical problems, the main purpose of the utility model is to provide a propeller disassembler, which can be used for disassembling the propeller. With the help of a thin split hydraulic jack, the disassembly efficiency is effectively improved, the difficulty of disassembling the propeller is reduced, and the time and effort are saved.

[0006] In order to realize the above-mentioned technical features, the purpose of the utility model is achieved as follows: a propeller disassembler, comprising a plurality of strong screws, one end of the strong screw is fixedly mounted on the threaded hole at the tail end of the propeller, the other end of the strong screw is limitedly mounted with a seat plate by a limit nut, a hydraulic jack is installed on the inner end surface of the seat plate, the top end of the piston rod of the hydraulic jack is in contact with the end of the propeller shaft; the hydraulic jack is connected to a manual hydraulic pump through an oil pipe, and a pressure handle is provided on the manual hydraulic pump.

[0007] The strong screw rod adopts a double-headed screw rod, one end of which is provided with a first threaded column, and the other end is provided with a second threaded column. The first threaded column is connected with the threaded hole at the tail end, and the second threaded column is used to install a limit nut.

[0008] The outside of the hydraulic jack is provided with a jack mounting ring plate, and the jack mounting ring plate is evenly processed with first through holes and second through holes;

[0009] The jack mounting ring plate is fixedly connected to the base plate by bolts and nuts passing through the first through holes;

[0010] The strong screw passes through the second through hole.

[0011] The seat plate is processed with a plurality of stepped holes evenly distributed in a circle, and a third through hole is arranged between the stepped holes; the stepped holes cooperate with the bolts, and the third through hole is used to pass the strong screw; the end face of the seat plate that cooperates with the hydraulic jack is processed with a positioning pit.

[0012] The hydraulic jack adopts a split-type thin hydraulic jack.

[0013] The hole position of the third through hole matches the threaded hole at the tail end of the propeller.

[0014] The utility model has the following beneficial effects:

[0015] 1. The disassembler of the utility model can be used for disassembling propellers. With the help of a thin split hydraulic jack, the disassembly efficiency is effectively improved, the difficulty of disassembling the propeller is reduced, and the time-saving and labor-saving effect is achieved.

[0016] 2. By adopting the above-mentioned double-headed screw, it is ensured that one end thereof can be connected to the propeller, and the other end can be used for limiting the mounting seat plate to form a reaction frame.

[0017] 3. The above-mentioned jack mounting ring plate can realize reliable fixed installation of the hydraulic jack.

[0018] 4. The seat plate can be used to reliably fix and limit the hydraulic jack, thereby ensuring that a reaction force is provided for the hydraulic jack during the subsequent disassembly process.

[0019] 5. The use of split thin hydraulic jack effectively saves installation space.

[0020] 6. The above-mentioned hole matching ensures that the seat plate can be reliably fixed and installed by strong screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1This is the overall structure diagram of the utility model.

[0023] Figure 2 It is a cross-sectional view of the surface where the powerful screw of the utility model is located.

[0024] Figure 3 It is a cross-sectional view of the surface where the bolt of the utility model is located.

[0025] Figure 4 This is a cross-sectional view of a propeller hub of the utility model.

[0026] Figure 5 It is a side view of the propeller hub of the utility model.

[0027] Figure 6 This is the front view of the powerful screw of the utility model.

[0028] Figure 7 It is the front view of the seat plate of the utility model.

[0029] Figure 8 For this utility model Figure 7 AA view of the middle seat plate.

[0030] Fig. 9 For this utility model Figure 7 BB view of the middle seat plate.

[0031] Fig.10 This is the installation diagram of the hydraulic jack and the jack mounting ring plate of the utility model.

[0032] Fig.11 It is a side view of the hydraulic jack and the jack mounting ring plate of the utility model.

[0033] Fig.12 This is a structural diagram of the hydraulic jack and seat plate installation of the utility model.

[0034] Fig.13 It is a side view of the installation of the hydraulic jack and the seat plate of the utility model.

[0035] Fig.14 This is the structural diagram of the manual hydraulic pump of the utility model.

[0036] In the figure: propeller 1, threaded hole at tail end 2, strong screw 3, jack mounting ring plate 4, limit nut 5, seat plate 6, hydraulic jack 7, oil pipe 8, propeller shaft 9, pressure handle 10, manual hydraulic pump 11, bolt 12, nut 13, tail shaft sealing device nut 14, tail shaft sealing device 15;

[0037] A first threaded column 301 and a second threaded column 302;

[0038] A first through hole 401 and a second through hole 402;

[0039] Step hole 601 , third through hole 602 , and positioning pit 603 . DETAILED DESCRIPTION

[0040] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0041] See also Figure 1-14 A propeller disassembler includes a plurality of strong screws 3, one end of which is fixedly mounted on the threaded hole 2 at the tail end of the propeller 1, and the other end of which is limitedly mounted with a seat plate 6 through a limit nut 5, and a hydraulic jack 7 is mounted on the inner end surface of the seat plate 6, and the top of the piston rod of the hydraulic jack 7 is in contact with the end of the propeller shaft 9; the hydraulic jack 7 is connected to a manual hydraulic pump 11 through an oil pipe 8, and a pressing handle 10 is provided on the manual hydraulic pump 11. This disassembler can be used for disassembling propellers, and with the help of a thin split hydraulic jack, it effectively improves the disassembly efficiency, reduces the difficulty of disassembling the propeller, and saves time and effort. By adopting the propeller remover of the above structure, in the specific use process, the strong screw 3 is installed on the threaded hole 2 at the tail end of the propeller 1, and the seat plate 6 is installed on the strong screw 3 through the limit nut 5 to form a reaction frame, and then a hydraulic jack 7 is arranged between the seat plate 6 and the propeller shaft 9, and the piston rod of the hydraulic jack 7 is driven to separate from the propeller 1 and finally the purpose of disassembling the propeller 1 is achieved.

[0042] Furthermore, the strong screw rod 3 is a double-headed screw rod, one end of which is provided with a first threaded column 301, and the other end of which is provided with a second threaded column 302, the first threaded column 301 is connected with the threaded hole 2 at the tail end, and the second threaded column 302 is used to install the limit nut 5. By adopting the above double-headed screw rod, it is ensured that one end of the screw rod can be connected with the propeller 1, and the other end can be used to limit the installation seat plate 6, so as to form a reaction frame.

[0043] Furthermore, a jack mounting ring plate 4 is disposed outside the hydraulic jack 7, and the jack mounting ring plate 4 is evenly processed with first through holes 401 and second through holes 402; the jack mounting ring plate 4 is fixedly connected to the seat plate 6 by passing through bolts 12 and nuts 13 on the first through holes 401; and the strong screw 3 passes through the second through hole 402. The above-mentioned jack mounting ring plate 4 can realize reliable fixed installation of the hydraulic jack 7.

[0044] Furthermore, the seat plate 6 is processed with a plurality of stepped holes 601 evenly distributed in a circumference, and a third through hole 602 is provided between the stepped holes 601; the stepped holes 601 are matched with the bolts 12, and the third through hole 602 is used to pass the strong screw 3; the end surface of the seat plate 6 that matches the hydraulic jack 7 is processed with a positioning pit 603. The seat plate 6 can be used to reliably fix and limit the hydraulic jack 7, thereby ensuring that a reaction force is provided for the hydraulic jack 7 during the subsequent disassembly process.

[0045] Furthermore, the hydraulic jack 7 adopts a split thin hydraulic jack. By adopting the split thin hydraulic jack, the installation space is effectively saved.

[0046] Furthermore, the hole position of the third through hole 602 matches the threaded hole 2 at the tail end of the propeller 1. Through the above hole position matching, it is ensured that the seat plate 6 can be reliably fixed and installed by the strong screw 3.

[0047] Working process and principle of this utility model:

[0048] The first step is to remove the tail shaft sealing device nut 14, so that the tail shaft sealing device 15 is separated from the propeller 1; remove the propeller hub cap and the propeller fixing nut; install the double nut 5 on the tail end of the powerful screw 3, and install half of the powerful screws 3 arranged in a row on the threaded hole 2 at the tail end of the propeller hub;

[0049] Step 2: Remove the double nut 5;

[0050] In the third step, the seat plate 6 and the split hydraulic jack 7 are assembled and put into use;

[0051] The fourth step is to position and install the seat plate 6 and the hydraulic jack assembly on the propeller shaft 9 through the strong screw 3 installed in advance through the through hole, and the front end of the hydraulic jack is in contact with the rear end of the propeller shaft 9;

[0052] Step 5: Continue to install the remaining half of the symmetrically arranged strong screws 3;

[0053] Step 6, tighten all double nuts 5 one by one with uniform force;

[0054] Step 7: Install the high-pressure soft oil pipe 8, and configure the length according to actual needs;

[0055] Step 8: Operate the pressure handle 10 to make the split 20t hydraulic jack work. The thrust generated by the hydraulic jack is converted into a pulling force by the structure of the disassembler, and the interference fit between the propeller 1 and the propeller shaft 9 is pulled to a transition fit. Continue to operate the pressure handle 10, the hydraulic jack continues to work, and the transition fit between the propeller 1 and the propeller shaft 9 becomes a clearance fit. At this time, the propeller can be lifted to the predetermined position by a lifting device. Retrieve the propeller disassembler, and the propeller disassembly project is completed.

Claims

1. A propeller remover, characterized in that: The invention comprises a plurality of strong screw rods (3), one end of the strong screw rods (3) is fixedly mounted on a threaded hole (2) at the tail end of a propeller (1), the other end of the strong screw rods (3) is limitedly mounted on a seat plate (6) through a limit nut (5), a hydraulic jack (7) is mounted on the inner end surface of the seat plate (6), the top end of the piston rod of the hydraulic jack (7) is in contact with the end of the propeller shaft (9); the hydraulic jack (7) is connected to a manual hydraulic pump (11) through an oil pipe (8), and a pressure handle (10) is provided on the manual hydraulic pump (11).

2. A propeller remover according to claim 1, characterized in that: The strong screw rod (3) is a double-headed screw rod, one end of which is provided with a first threaded column (301) and the other end of which is provided with a second threaded column (302), the first threaded column (301) being connected to the threaded hole (2) at the rear end, and the second threaded column (302) being used to install a limit nut (5).

3. A propeller remover according to claim 1, characterized in that: The hydraulic jack (7) is provided with a jack mounting ring plate (4) on the outside, and the jack mounting ring plate (4) is evenly processed with first through holes (401) and second through holes (402); The jack mounting ring plate (4) is fixedly connected to the seat plate (6) by means of bolts (12) and nuts (13) passing through the first through holes (401); The powerful screw rod (3) passes through the second through hole (402).

4. A propeller remover according to claim 3, characterized in that: The seat plate (6) is processed with a plurality of stepped holes (601) evenly distributed in a circumference, and a third through hole (602) is provided between the stepped holes (601); the stepped holes (601) cooperate with the bolts (12), and the third through hole (602) is used to pass the strong screw rod (3); and a positioning pit (603) is processed on the end surface of the seat plate (6) that cooperates with the hydraulic jack (7).

5. A propeller remover according to claim 1, characterized in that: The hydraulic jack (7) is a split-type thin hydraulic jack.

6. A propeller remover according to claim 4, characterized in that: The hole position of the third through hole (602) matches the threaded hole (2) at the tail end of the propeller (1).

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