CN210550902U - Ship tail shaft nut dismounting tool - Google Patents
Ship tail shaft nut dismounting tool Download PDFInfo
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- CN210550902U CN210550902U CN201920779940.3U CN201920779940U CN210550902U CN 210550902 U CN210550902 U CN 210550902U CN 201920779940 U CN201920779940 U CN 201920779940U CN 210550902 U CN210550902 U CN 210550902U
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Abstract
The utility model discloses a boats and ships tail shaft nut assembly and disassembly tools, assembly and disassembly tools is through setting up the copper sheathing that can rotate along with the tail shaft nut jointly on the steel shaft, and set up the ball bearing between copper sheathing and the steel shaft, can effectively reduce the friction resistance that nut and copper sheathing produced when rotatory around the steel shaft, can carry out the dismouting to the tail shaft nut that weight is bigger under the same circumstances, can carry out the dismouting to the boats and ships tail shaft nut that weight is 3 tons at most, and the suitability is strong; the screw thread of nut can not cause the damage among the dismouting process, and the screw in of nut is unscrewed the operation more lightly simultaneously, is favorable to saving staff's physical power and time.
Description
Technical Field
The utility model relates to a shipbuilding technical field, concretely relates to boats and ships tail shaft nut assembly and disassembly tools.
Background
When a ship is maintained, parts need to be disassembled and inspected, wherein the weight of a tail shaft nut of a tail shaft propeller of the ship is generally in the range of 0.3-3 tons, so that the disassembling and assembling work such as loosening and screwing in needs to be carried out by adopting a special tool.
The mounting mode of the hydraulic nut on the stern shaft of the existing large ship is as follows: the lifting rings are fixed on the hydraulic nuts, the hand chain block is used for driving the steel wire rope to lift the lifting rings, the hydraulic nuts are lifted to the installation positions and are installed on bolts of a tail shaft of a large ship through the hand dragging of a plurality of installers, and finally the hand chain block or a crane is used for further screwing the hydraulic nuts through the steel wire rope. Due to the limitation of the installation position of the hydraulic nut on the tail shaft of the large ship, no space for a crane to work is available when the hydraulic nut rises to the installation position, so that the hand-pulling block can only be used for lifting, but the position on the hydraulic nut where the lifting ring is installed is subjected to large force, so that the stress is too concentrated, the hydraulic nut is damaged, and even the hydraulic nut is broken; and the hydraulic nut and the bolt are axially aligned, a plurality of installation personnel are required to be matched to consume physical power and time when the hydraulic nut is rotationally installed, and the installation quality cannot be guaranteed.
The prior art (CN103522256A) discloses a special mounting tool for a hydraulic nut of a large ship tail shaft, please refer to fig. 1, fig. 1 is a schematic structural diagram of the special mounting tool for a large ship tail shaft in the prior art, as shown in the drawing, the special mounting tool comprises a main body, and a hanging bar and a pin fixed on the main body, both the hanging bar and the pin are cylindrical, the hanging bar has a hanging and pulling part and a blocking part with external threads, the blocking part is located at one end of the hanging bar far away from the main body, and the diameter of the blocking part is smaller than that of the hanging and pulling part; the lifting part is sleeved with a sleeve, the blocking part is sleeved with a baffle, and a nut matched with the external thread is arranged on the blocking part on the right side of the baffle; the pin shaft is sleeved with a roller and a check ring positioned on the right side of the roller, through holes through which split pins penetrate are formed in the check ring and the pin shaft, and the split pins are positioned in the through holes.
In the special installation tool for the ship tail shaft, the hanging rod and the pin shaft are vertically welded on the main body, a stress concentration area can be generated on the installation tool main body due to a three-section welding type structure, and when a nut with larger weight is hoisted, the risk of fracture can be generated at the welding position, so that the interruption of maintenance engineering, the economic loss and even the personal injury to field workers are caused, and the potential safety hazard is generated; in addition, this scheme is that the sleeve pipe cover is located and is hung on drawing the portion, and then realize balanced regulation through its horizontal slip, simultaneously the round pin epaxial is established to the cylinder cover, installs through cylinder and hydraulic nut rotation together, in order to bear the great weight of nut and the inertia that its rotation produced, sleeve pipe and cylinder must adopt the material that intensity is bigger, also need great volume simultaneously, therefore its dead weight can increase, has increased and has hung and draw and the degree of difficulty when the nut rotates. In addition, the roller and the pin shaft are connected in a sleeved mode, the friction coefficient of the contact surface of the roller is large, in addition, the pressure of the nut on the roller during installation is increased, the friction coefficient between the roller and the pin shaft is further increased, huge friction force can be generated between the roller and the pin shaft during rotation, and the physical strength and the time consumption of workers are excessive.
SUMMERY OF THE UTILITY MODEL
To not enough and the defect that exists among the above-mentioned prior art, the utility model provides a boats and ships tail shaft nut assembly and disassembly tools, it has easy and simple to handle, intensity is big, application scope can not cause the advantage of destruction to the nut screw thread big while the installation.
The application achieves the purpose through the following technical scheme:
a dismounting tool for a ship tail shaft nut comprises a steel plate, a steel shaft, a copper sleeve and a bearing group, wherein the steel plate is integrally formed and has a hook-shaped structure, one end of the steel plate is provided with a plurality of lifting ring holes, and the other end of the steel plate is fixedly connected with the steel shaft; the copper sleeve is sleeved on the steel shaft; the bearing group is assembled on the steel shaft and positioned between the steel shaft and the copper sleeve.
Compared with the prior art, the dismounting tool for the ship tail shaft nut provided by the utility model has the advantages that the copper sleeve which can rotate along with the tail shaft nut and jointly wind the steel shaft is arranged, the ball rolling bearing is arranged between the copper sleeve and the steel shaft, the friction resistance generated when the nut and the copper sleeve rotate around the steel shaft can be effectively reduced, the tail shaft nut with larger weight can be dismounted under the same condition, the ship tail shaft nut with 3 tons of weight can be dismounted to the maximum extent, and the applicability is strong; the screw thread of the nut cannot be damaged in the dismounting process, and meanwhile, the screwing-in and screwing-out operation of the nut is more convenient, so that the labor and time of workers can be saved.
Further, the steel plate is U-shaped.
Further, the steel shaft is including connecting gradually and the diameter increases in proper order, all is cylindric steel shaft main part, first connecting portion and second connecting portion, the second connecting portion with the steel sheet is connected.
Furthermore, the bearing group comprises a plurality of ball bearings sleeved on the steel shaft main body, each ball bearing comprises an inner ring, an outer ring and a plurality of steel balls arranged between the inner ring and the outer ring, the outer ring is tightly matched with the copper sleeve and can synchronously rotate along with the copper sleeve, and the inner ring is tightly matched with the steel shaft and is fixed on the steel shaft main body; the copper sheathing includes cylinder and first bulge loop, first bulge loop is formed by the internal surface internal extension that is located cylinder one end, first bulge loop sets up in the radial outside of first connecting portion and is located the bearing group with between the second connecting portion.
Furthermore, the device also comprises a positioning piece for limiting the bearing set.
Furthermore, the setting element is located including the cover location meson in the steel axle main part and be used for spacingly the circlip of location meson, the location meson is located the outside of bearing group, be equipped with the second recess of cyclic annular setting in the steel axle main part, circlip scarf joint in the second recess just is located the axial outside of location meson.
Furthermore, the positioning piece further comprises a positioning sleeve sleeved on the steel shaft main body, and one side end face or two side end faces of the positioning piece are fixedly connected with the ball bearing inner ring. The positioning sleeve is used for filling space, and the rolling ball bearing is prevented from moving between the copper sleeve and the steel shaft.
Furthermore, gaps are formed between the copper sleeve and the steel shaft in the circumferential direction and the axial direction, so that the friction resistance between the copper sleeve and the steel shaft during rotation can be effectively reduced, and a locking safety is provided when the copper sleeve moves backwards; the locating sleeve and the locating meson are in clearance fit with the steel shaft and the copper sleeve, friction force is effectively reduced, when the rolling ball bearing bursts and is damaged in the rotating working process of the copper sleeve and the nut, all weight can be instantly transferred to the locating meson and the locating sleeve, a rolling form is changed into a sliding form, and quality accidents caused by large impact are prevented.
Further, the device also comprises an O-shaped ring; the annular first recess that is provided with on the surface of first connecting portion, O type circle with first recess phase-match seals the clearance between the first connecting portion of copper sheathing and steel shaft to avoid external debris and moisture to get into, cause the influence to assembly and disassembly tools.
Compared with the prior art, the utility model provides a boats and ships tail shaft nut assembly and disassembly tools has following advantage and beneficial effect:
1) by adopting the steel plate with the integrated hook-shaped structure, one end of the steel plate is welded with the steel shaft, so that the stress is more uniform compared with a multi-section welding structure, and the problem of fracture caused by a stress concentration area generated in the stress process can be effectively solved;
2) the ball bearing is arranged between the copper sleeve and the steel shaft, the outer ring of the ball bearing synchronously rotates along with the copper sleeve, the inner ring is fixedly connected with the steel shaft, and the arrangement of the ball bearing can effectively reduce the frictional resistance generated when the nut and the copper sleeve rotate around the steel shaft, can bear a tail shaft nut with larger weight under the same condition as the prior art, can meet the requirement of a ship tail shaft nut with the weight below 3 tons, and has strong applicability; meanwhile, the screwing-in and screwing-out operation of the nut is more convenient, and the labor and time of workers are saved.
3) Compared with the prior art the sleeve pipe cover is established hang the portion of drawing, through controlling the balanced mode of removal adjustment, the utility model discloses a set up a plurality of hanging ring hole, just can realize realizing the regulation to the balance to assembly and disassembly tools through selecting one of them or two, can effectively alleviate assembly and disassembly tools's dead weight, make the operation more simple and convenient can reduce the hoist and mount degree of difficulty simultaneously, reduce the potential safety hazard.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a mounting tool dedicated for a stern shaft of a ship in the prior art
Fig. 2 is a schematic structural view of the dismounting tool for the ship tail shaft nut of the invention;
FIG. 3 is a schematic structural view of the steel shaft;
FIG. 4 is a schematic structural view of the copper sleeve;
FIG. 5 is a schematic structural view of the positioning sleeve;
FIG. 6 is a schematic structural diagram of the positioning meson;
fig. 7 is a partial view of the area a in fig. 1.
In the figure: a steel plate 10; a steel shaft 20; a copper bush 30; a bearing set 40; a positioning member 50;
steel plate: a shackle hole 12;
steel shaft: a steel shaft main body 21; a first connection 22; a second connecting portion 23; a first groove 24; a second groove 25; an O-ring 26;
copper sheathing: the first connection portion 32;
bearing: an inner ring 42; an outer ring 44; steel balls 46;
positioning piece: a positioning sleeve 52; a positioning meson 54; circlip 56.
Detailed Description
Example 1
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Please refer to fig. 2, fig. 2 is a schematic structural diagram of the dismounting tool for the nut of the stern shaft of the ship of the present invention. As shown in the figure, the dismounting tool for the ship tail shaft nut comprises a steel plate 10, a steel shaft 20, a copper sleeve 30, a bearing set 40 and a positioning piece 50, wherein the steel plate 10 is integrally formed and has a hook-shaped structure. Specifically, the steel plate is U-shaped, the upper end of the steel plate is provided with a plurality of lifting ring holes 12, and the number of the lifting ring holes can be adjusted according to actual conditions, and is 3 in the embodiment; the other end of the steel plate 10 is fixedly connected with the steel shaft 20; the copper sleeve 30 is sleeved on the steel shaft 20; the bearing set 20 is assembled on the steel shaft 20 and located between the steel shaft 20 and the copper sleeve 30.
Referring to fig. 3, fig. 3 is a schematic structural view of the steel shaft, and as shown in the figure, the steel shaft 20 includes a steel shaft main body 21, a first connecting portion 22 and a second connecting portion 23, which are sequentially connected from left to right in the figure, have sequentially increased diameters, and are cylindrical, and the second connecting portion 22 is connected to the steel plate 10. The first connecting portion 22 is annularly provided with a first groove 24 and an O-ring 26, and the O-ring 26 is matched with the first groove 24 to prevent foreign matters and water from entering the gap, so as to prevent the hook from being damaged; the steel shaft main body 21 is further provided with a second groove 25.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the copper bush, the copper bush 30 includes a cylinder and a first protruding ring 32, the first protruding ring 32 is formed by extending inward from an inner surface of one end of the cylinder, and the first protruding ring 32 is disposed radially outside the first connecting portion 22 and between the bearing set 30 and the second connecting portion 23.
The bearing group 40 comprises a plurality of ball bearings sleeved on the steel shaft main body 21, each ball bearing comprises an inner ring 42, an outer ring 44 and a plurality of steel balls 46 arranged between the inner ring and the outer ring, the number of the ball bearings 40 can be adjusted according to the weight of the installed nut, and the number of the ball bearings is 3 in the embodiment. The outer ring 44 is tightly matched with the copper sleeve 30 and can synchronously rotate along with the copper sleeve 30, and the inner ring 42 is tightly matched with the steel shaft 20 and fixed on the steel shaft main body 21 without rotating.
Referring to fig. 5 and 6, fig. 5 and 6 are schematic structural views of the positioning sleeve and the positioning meson, respectively. The positioning piece comprises a positioning sleeve 52, a positioning meson 54 and an elastic retainer ring; one end face of the positioning sleeve 52 is fixedly connected with the inner ring 42 of one ball bearing 40 or two end faces of the positioning sleeve are respectively contacted with the inner rings 42 of two ball bearings 40, in the embodiment, the positioning sleeve 52 is used for filling space to prevent the ball bearings 40 from moving; the positioning meson 54 is positioned at the outer side of the bearing group 40 and is fixedly connected with the steel shaft 20 and the inner ring 42 of the rolling ball bearing 40; the elastic retainer ring is embedded in the second groove 25 and is positioned on the axial outer side of the positioning medium 54; the positioning sleeve 52 and the positioning meson 54 are combined to limit the bearing set 40, so as to prevent the rolling ball bearing 40 from moving between the steel shaft 20 and the copper sleeve 30 and further falling off.
Referring to fig. 7, fig. 7 is a partially enlarged view of a region a in fig. 1. As shown in the figure, the copper sleeve 30 and the steel shaft 20 are provided with gaps (namely a and b in the figure) in the circumferential direction and the axial direction; the positioning sleeve 30 is in clearance fit with the copper sleeve 30, the steel shaft main body 21 and the ball bearing outer ring 44 (namely c and d in the drawing), the positioning meson 54 is also in clearance fit with the copper sleeve 30 and the ball bearing outer ring 44 (namely e and f in the drawing), the ball bearing outer ring 44 is in clearance fit with the steel shaft first connecting plate (namely g in the drawing), and the clearance can effectively reduce the friction resistance generated between each rotating part (the copper sleeve 30 and the ball bearing outer ring 44) and each fixed part (the ball bearing inner ring 42, the positioning sleeve 52, the positioning meson 54, the steel shaft first connecting part 22 and the second connecting part 23) in the working process; in addition, the gap a can also provide a stop safety when the copper sleeve 30 moves backwards; meanwhile, when the copper sleeve 30 and the nut are burst and damaged in the rotating process of the ball bearing 40, the whole weight can be instantly transferred to the positioning sleeve 52 and the positioning meson 54, the rolling form is changed into the sliding form, and the quality accident caused by overlarge impact is prevented.
When the tool is in work, the chain block and the disassembling tool are connected through a steel wire or a rope, the balance adjustment of the disassembling tool is carried out by selecting one or two combined lifting ring holes 12, and then the chain block is used for moving the disassembling tool to a required position; placing the copper bush 30 in a nut to be disassembled, and adjusting the chain block to enable the stress of the copper bush 30 to be the net weight of the disassembled nut or enable the nut to be easily moved by manpower; then, the pins are inserted into the nut pin holes and are matched with the nut pin holes, the pins are steel bars in the embodiment, the nuts rotate by moving the steel bars, the copper sleeves rotate around the steel shafts, and therefore the nut is screwed in and out in a dismounting operation.
Compared with the prior art, the utility model provides a boats and ships tail shaft nut assembly and disassembly tools has following advantage and beneficial effect:
1) by adopting the steel plate with the integrated hook-shaped structure, one end of the steel plate is welded with the steel shaft, so that the stress is more uniform compared with a multi-section welding structure, and the problem of fracture caused by a stress concentration area generated in the stress process can be effectively solved;
2) the ball bearing is arranged between the copper sleeve and the steel shaft, the outer ring of the ball bearing synchronously rotates along with the copper sleeve, the inner ring is fixedly connected with the steel shaft, and the arrangement of the ball bearing can effectively reduce the frictional resistance generated when the nut and the copper sleeve rotate around the steel shaft, can bear a tail shaft nut with larger weight under the same condition as the prior art, can meet the requirement of a ship tail shaft nut with the weight below 3 tons, and has strong applicability; meanwhile, the screwing-in and screwing-out operation of the nut is more convenient, and the labor and time of workers are saved.
3) For in the comparison file 1 the sleeve pipe cover is established hang the portion of drawing, through controlling the balanced mode of removal adjustment, the utility model discloses a set up a plurality of hanging ring hole, just can realize realizing the regulation to the balance to assembly and disassembly tools through selecting one of them or two, can effectively alleviate assembly and disassembly tools's dead weight, make the operation more simple and convenient can reduce the hoist and mount degree of difficulty simultaneously, reduce the potential safety hazard.
The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.
Claims (9)
1. The utility model provides a boats and ships tail shaft nut assembly and disassembly tools which characterized in that: the steel plate is integrally formed and has a hook-shaped structure, a plurality of lifting ring holes are formed in one end of the steel plate, and the other end of the steel plate is fixedly connected with the steel shaft; the copper sleeve is sleeved on the steel shaft; the bearing group is assembled on the steel shaft and positioned between the steel shaft and the copper sleeve.
2. The watercraft tail shaft nut dismounting tool according to claim 1, characterized in that: the steel plate is U-shaped.
3. The watercraft tail shaft nut dismounting tool according to claim 1, characterized in that: the steel shaft comprises a steel shaft main body, a first connecting portion and a second connecting portion, wherein the steel shaft main body, the first connecting portion and the second connecting portion are sequentially connected, the diameter of the steel shaft main body is sequentially increased, and the steel shaft main body, the first connecting portion and the second connecting portion are cylindrical.
4. The watercraft tail shaft nut dismounting tool according to claim 3, characterized in that: the bearing group comprises a plurality of ball bearings sleeved on the steel shaft main body, each ball bearing comprises an inner ring, an outer ring and a plurality of steel balls arranged between the inner ring and the outer ring, the outer ring is tightly matched with the copper sleeve and can synchronously rotate along with the copper sleeve, and the inner ring is tightly matched with the steel shaft and is fixed on the steel shaft main body; the copper sheathing includes cylinder and first bulge loop, first bulge loop is formed by the internal surface internal extension that is located cylinder one end, first bulge loop sets up in the radial outside of first connecting portion and is located the bearing group with between the second connecting portion.
5. The watercraft tail shaft nut dismounting tool according to claim 4, characterized in that: the positioning device also comprises a positioning piece for limiting the bearing set.
6. The watercraft tail shaft nut dismounting tool according to claim 5, characterized in that: the setting element is located including the cover location meson in the steel axle main part with be used for spacingly the circlip of location meson, the location meson is located the outside of bearing group, be equipped with the second recess of cyclic annular setting in the steel axle main part, circlip scarf joint in the second recess just is located the axial outside of location meson.
7. The watercraft tail shaft nut dismounting tool according to claim 6, characterized in that: the positioning piece further comprises a positioning sleeve sleeved on the steel shaft main body, and one side end face or two side end faces of the positioning sleeve are fixedly connected with the ball bearing inner ring.
8. The watercraft tail shaft nut removal tool as set forth in claim 7, wherein: gaps are formed between the copper sleeve and the steel shaft in the circumferential direction and the axial direction; the positioning sleeve and the positioning meson are in clearance fit with the steel shaft and the copper sleeve, and a clearance is formed between the positioning sleeve and the positioning meson and between the positioning meson and the adjacent rolling ball bearing outer ring.
9. The watercraft tail shaft nut dismounting tool according to claim 3, characterized in that: the device also comprises an O-shaped ring; the outer surface of the first connecting part is annularly provided with a first groove, and the O-shaped ring is matched with the first groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920779940.3U CN210550902U (en) | 2019-05-27 | 2019-05-27 | Ship tail shaft nut dismounting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920779940.3U CN210550902U (en) | 2019-05-27 | 2019-05-27 | Ship tail shaft nut dismounting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210550902U true CN210550902U (en) | 2020-05-19 |
Family
ID=70675599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920779940.3U Active CN210550902U (en) | 2019-05-27 | 2019-05-27 | Ship tail shaft nut dismounting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210550902U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202526A (en) * | 2019-05-27 | 2019-09-06 | 广州中船文冲船坞有限公司 | A kind of tail shaft nuts of ship dismantling device and assembly and disassembly methods |
| CN111661275A (en) * | 2020-05-29 | 2020-09-15 | 广州文冲船舶修造有限公司 | Rudder stock replacing process |
-
2019
- 2019-05-27 CN CN201920779940.3U patent/CN210550902U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202526A (en) * | 2019-05-27 | 2019-09-06 | 广州中船文冲船坞有限公司 | A kind of tail shaft nuts of ship dismantling device and assembly and disassembly methods |
| CN111661275A (en) * | 2020-05-29 | 2020-09-15 | 广州文冲船舶修造有限公司 | Rudder stock replacing process |
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