CN113799056B - Dismounting mechanism for big nut of stern shaft sealing device - Google Patents
Dismounting mechanism for big nut of stern shaft sealing device Download PDFInfo
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- CN113799056B CN113799056B CN202111029504.2A CN202111029504A CN113799056B CN 113799056 B CN113799056 B CN 113799056B CN 202111029504 A CN202111029504 A CN 202111029504A CN 113799056 B CN113799056 B CN 113799056B
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- gear
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- pinion
- gear wheel
- assembly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/143—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same for installing wire thread inserts or tubular threaded inserts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The utility model provides a dismouting mechanism of stern shaft sealing device big nut, including the gear wheel assembly, with one set at least pinion gear assembly of gear wheel assembly matched with, the gear wheel assembly is the annular structure that forms by two semi-ring lockings, the one end of gear wheel assembly and the dismantlement groove of big nut insert the cooperation, the other end of gear wheel assembly is the bull gear ring, the middle part of gear wheel assembly is through a plurality of deflectors and the casing hole normal running fit that set up around its periphery, the pinion gear assembly includes apron down, the gear shaft, the cover is established at the outside pinion of gear shaft, the tip and the casing terminal surface fixed connection of apron down, the one end of gear shaft and the middle part normal running fit of apron down, the pinion meshes with the bull gear ring mutually. The design is not only suitable for dismounting the large nut with the internal and external threads in a narrow space, but also improves the dismounting efficiency of the large nut.
Description
Technical Field
The invention belongs to the technical field of ships, and particularly relates to a dismounting mechanism for a large nut of a stern shaft sealing device.
Background
The tail shaft is also called tail shaft, one end of the tail shaft is connected with a propeller, and the other end of the tail shaft is connected with a gear box or a coupling and then connected with an engine. After the stern shaft sealing device works in seawater for a long time, water scale and floating rust can be deposited on the threads between the large nut and the shell, and the large nut is difficult to disassemble and assemble during maintenance due to the limited space of the shell and the large nut inner hole penetrating shaft system. The current disassembly and assembly methods mainly comprise:
1. the simple wrench tool is adopted during initial assembly, so that the wrench tool cannot be detached completely after being used for a period of time;
2. after long-term use, the large iron hammer and the red copper bar are adopted to aim at the dismounting groove of the large nut for hammering, the method needs more than 3 hours for one-time dismounting, the time spent on mounting is longer, the dismounting groove is easy to deform due to long-term hammering, next dismounting is influenced, and the large nut is scrapped when the dismounting groove is serious;
3. when hammering is invalid, the shell is detached by adopting a method of baking the shell by fire, so that the shell is deformed, the installation is more difficult, and the use performance of a product is seriously influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a dismounting mechanism for a large nut of a stern shaft sealing device, which is suitable for a narrow space and has high dismounting efficiency.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides a dismouting mechanism of stern axle sealing device big nut, includes the gear wheel assembly, with one set of at least pinion assembly of gear wheel assembly matched with, the annular structure that the gear wheel assembly formed for being locked by two semi-rings, the cooperation is inserted with the dismantlement groove of big nut to the one end of gear wheel assembly, and the other end of gear wheel assembly is the gear wheel ring, and a plurality of deflectors and casing hole normal running fit that the middle part of gear wheel assembly set up through around its periphery, pinion assembly includes apron, gear shaft, cover down and establishes the outside pinion of gear shaft, the tip and the housing end face fixed connection of apron down, the one end of gear shaft and the middle part normal running fit of apron down, the pinion meshes with the gear wheel ring mutually.
The large gear assembly further comprises a matching ring coaxially arranged with the large gear ring, one side of the matching ring is inserted and matched with the dismounting groove of the large nut through a convex block, the other side of the matching ring is fixedly connected with the inner side surface of the large gear ring through a rib, and the guide plate is fixed to the top of the rib.
The pinion assembly further comprises at least one pressing plate assembly, the pressing plate assembly comprises a pressing plate body, a guide pin and a spring, the spring is sleeved on the guide pin, a bending portion which is in contact with the outer side face of the large gear ring is arranged on one side of the pressing plate body, one end of the guide pin is inserted into the pressing plate body and matched with the lower cover plate after passing through a through hole formed in the pressing plate body, and two ends of the spring are respectively abutted to adjusting nuts which are sleeved with the other ends of the pressing plate body and the guide pin.
The pinion assembly further comprises an upper cover plate, the end portion of the upper cover plate is fixedly connected with the lower cover plate, a cavity for containing the pinion is formed between the middle portion of the upper cover plate and the lower cover plate in a surrounding mode, and the other end of the gear shaft penetrates through the upper cover plate and then extends to the outside.
The pinion assembly further comprises at least one pressing plate assembly, the pressing plate assembly comprises a pressing plate body, a guide pin and a spring, the spring is sleeved on the guide pin, a bending portion which is in contact with the outer side face of the large gear ring is arranged on one side of the pressing plate body, one end of the guide pin is inserted into the upper cover plate to be matched after penetrating through a through hole formed in the pressing plate body, and two ends of the spring are respectively abutted to adjusting nuts which are sleeved with the other ends of the pressing plate body and the guide pin.
The pressure plate assembly further comprises a gasket sleeved on the guide pin, and two sides of the gasket are respectively in contact with the spring and the adjusting nut.
The width of the small gear is larger than or equal to the sum of the width of the ring gear of the large gear ring and the axial stroke of the large gear ring.
The other end of the gear shaft is of a hexagonal or square structure matched with the wrench.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention relates to a disassembly and assembly mechanism of a big nut of a stern shaft sealing device, which comprises a big gear component and at least one set of pinion component matched with the big gear component, wherein the big gear component is in an annular structure formed by locking two semi-rings, one end of the big gear component is inserted and matched with a disassembly groove of the big nut, the other end of the big gear component is a big gear ring, the middle part of the big gear component is in rotating fit with an inner hole of a shell through a plurality of guide plates arranged around the outer circumference of the big gear component, the pinion component comprises a lower cover plate, a gear shaft and a pinion sleeved outside the gear shaft, the end part of the lower cover plate is fixedly connected with the end surface of the shell, one end of the gear shaft is in rotating fit with the middle part of the lower cover plate, and the pinion is meshed with the big gear ring. Therefore, the invention is not only suitable for dismounting the large nut with the internal and external threads in a narrow space, but also improves the dismounting efficiency of the large nut.
2. The invention relates to a small gear assembly of a dismounting mechanism of a large nut of a stern shaft sealing device, which also comprises at least one pressing plate assembly, wherein the pressing plate assembly comprises a pressing plate body, a guide pin and a spring sleeved on the guide pin, one side of the pressing plate body is provided with a bending part contacted with the outer side surface of a large gear ring, one end of the guide pin passes through a through hole formed in the pressing plate body and then is inserted and matched with a lower cover plate, and two ends of the spring are respectively abutted against an adjusting nut sleeved on the other end of the pressing plate body and the other end of the guide pin. Therefore, the invention can avoid the projection from loosening from the disassembling groove without influencing the axial movement of the gearwheel.
Drawings
Fig. 1 is an assembly schematic of the present invention.
Fig. 2 is a schematic structural diagram of the bull gear assembly of fig. 1.
FIG. 3 is an exploded view of the pinion assembly of example 1.
Fig. 4 is an exploded view of the pinion assembly of example 2.
In the figure, a large gear assembly 1, a large gear ring 11, a matching ring 12, a bump 13, a rib 14, a small gear assembly 2, a lower cover plate 21, a gear shaft 22, a small gear 23, a pressure plate assembly 24, a pressure plate body 241, a bent part 2411, a through hole 2412, a guide pin 242, a spring 243, an adjusting nut 244, a gasket 245, an upper cover plate 25, a cavity 26, a guide plate 3, a wrench 4 and a shell end face 5.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1-4, a dismouting mechanism of stern axle sealing device big nut, including gear wheel assembly 1, with gear wheel assembly 1 matched with at least one set of pinion assembly 2, gear wheel assembly 1 is the loop configuration who forms by two semi-ring lockings, and the one end of gear wheel assembly 1 and the dismantlement groove of big nut insert the cooperation, and gear wheel assembly 1's the other end is gear wheel ring 11, and gear wheel assembly 1's middle part is through a plurality of deflectors 3 and the casing hole normal running fit that set up around its periphery, pinion assembly 2 includes apron 21, gear shaft 22 down, the cover is established at the outside pinion 23 of gear shaft 22, the tip and the casing terminal surface 5 fixed connection of apron 21 down, the one end of gear shaft 22 and the middle part normal running fit of apron 21 down, pinion 23 meshes with gear wheel ring 11 mutually.
The large gear assembly 1 further comprises a matching ring 12 which is coaxially arranged with the large gear ring 11, one side of the matching ring 12 is inserted and matched with a dismounting groove of a large nut through a convex block 13, the other side of the matching ring 12 is fixedly connected with the inner side face of the large gear ring 11 through a rib 14, and the guide plate 3 is fixed at the top of the rib 14.
The pinion assembly 2 further comprises at least one pressure plate assembly 24, the pressure plate assembly 24 comprises a pressure plate body 241, a guide pin 242 and a spring 243 sleeved on the guide pin 242, a bending portion 2411 in contact with the outer side surface of the bull gear ring 11 is arranged on one side of the pressure plate body 241, one end of the guide pin 242 penetrates through a through hole 2412 formed in the pressure plate body 241 and then is in insertion fit with the lower cover plate 21, and two ends of the spring 243 are respectively abutted to adjusting nuts 244 sleeved on the other ends of the pressure plate body 241 and the guide pin 242.
The pinion assembly 2 further comprises an upper cover plate 25, the end portion of the upper cover plate 25 is fixedly connected with the lower cover plate 21, a cavity 26 for accommodating the pinion 23 is formed between the middle portion of the upper cover plate 25 and the lower cover plate 21 in a surrounding mode, and the other end of the gear shaft 22 penetrates through the upper cover plate 25 and then extends to the outside.
The pinion assembly 2 further comprises at least one pressure plate assembly 24, the pressure plate assembly 24 comprises a pressure plate body 241, a guide pin 242 and a spring 243 sleeved on the guide pin 242, a bending portion 2411 in contact with the outer side surface of the bull gear ring 11 is arranged on one side of the pressure plate body 241, one end of the guide pin 242 penetrates through a through hole 2412 formed in the pressure plate body 241 and then is in insertion fit with the upper cover plate 25, and two ends of the spring 243 are respectively abutted to adjusting nuts 244 sleeved on the other ends of the pressure plate body 241 and the guide pin 242.
The pressure plate assembly 24 further comprises a gasket 245 sleeved on the guide pin 242, and two sides of the gasket 245 are respectively contacted with the spring 243 and the adjusting nut 244.
The width of the pinion 23 is greater than or equal to the sum of the rim width of the large gear ring 11 and the axial stroke thereof.
The other end of the gear shaft 22 is a hexagonal or square structure matched with the wrench 4.
The principle of the invention is illustrated as follows:
the invention provides a dismounting mechanism for a big nut of a stern shaft sealing device, which adopts a two-half type locking structure, can still be installed and used under the condition of not disconnecting a shaft system, and is suitable for dismounting and installing the big nut with internal and external threads in a narrow space; the mechanism is arranged by fully utilizing the characteristics of the inner cavity of the shell and the end face mounting holes, and has light weight and simple and reasonable structure; meanwhile, the mechanism can amplify the torque transmitted to the large nut for multiple times, and the specific means comprises increasing the transmission ratio of gear engagement, prolonging the length of the wrench and increasing the number of small gear assemblies.
The projection 13 may be formed integrally with the mating ring 12 or may be formed in a fabricated structure, which may accommodate different removal slots.
The gearwheel can adopt an integral or connecting assembly type structure, and if the assembly type structure is adopted, the gearwheel can adapt to different transmission ratios.
The number of ribs 14 is at least 2.
The guide plate 3 can rotate along the circumference of the inner hole of the shell and slide along the axis.
Example 1:
referring to fig. 1-3, a dismounting mechanism for a big nut of a stern shaft sealing device comprises a big gear component 1, at least one set of small gear components 2 matched with the big gear component 1, the big gear component 1 is an annular structure formed by locking two semi-rings, the big gear component 1 comprises a big gear ring 11 and a matching ring 12 which is coaxially arranged with the big gear ring 11, one side of the matching ring 12 is inserted and matched with a disassembly groove of a large nut through a convex block 13, the other side of the matching ring 12 is fixedly connected with the inner side surface of a large gear ring 11 through 4 ribs 14, a guide plate 3 which is in running fit with an inner hole of the shell is fixed at the top of each rib 14, the pinion assembly 2 comprises a lower cover plate 21, a gear shaft 22, a pinion 23 sleeved outside the gear shaft 22 and at least one pressure plate assembly 24, the end part of the lower cover plate 21 is fixedly connected with the end surface 5 of the shell, one end of the gear shaft 22 is rotationally matched with the middle part of the lower cover plate 21, the other end of the gear shaft 22 is in a hexagonal structure matched with the wrench 4, the pinion 23 is meshed with the large gear ring 11, and the width of the pinion 23 is greater than the sum of the rim width of the ring gear 11 and its axial travel, the platen assembly 24 includes a platen body 241, a guide pin 242, a spring 243, an adjustment nut 244, a shim 245, one side of the pressing plate body 241 is provided with a bending part 2411 contacting with the outer side surface of the large gear ring 11, one end of the guide pin 242 passes through a through hole 2412 formed in the pressing plate body 241 and then is inserted into and matched with the lower cover plate 21, the spring 243, the adjusting nut 244 and the gasket 245 are all sleeved on the guide pin 242, both ends of the spring 243 are respectively in contact with one sides of the pressing plate body 241 and the spacer 245, and the other side of the spacer 245 is in contact with the adjusting nut 244.
Example 2:
referring to fig. 4, the difference from embodiment 1 is that:
the pinion assembly 2 further comprises an upper cover plate 25, the end portion of the upper cover plate 25 is fixedly connected with the lower cover plate 21, a cavity 26 for accommodating the pinion 23 is formed between the middle portion of the upper cover plate 25 and the lower cover plate 21 in a surrounding mode, the other end of the gear shaft 22 extends to the outside after penetrating through the upper cover plate 25, and one end of the guide pin 242 is inserted into and matched with the upper cover plate 25 after penetrating through a through hole 2412 formed in the pressing plate body 241.
Claims (8)
1. The utility model provides a dismouting mechanism of big nut of stern shaft sealing device which characterized in that:
dismouting mechanism includes gear wheel assembly (1), with one set at least pinion assembly (2) of gear wheel assembly (1) matched with, gear wheel assembly (1) is the annular structure that forms by two semi-ring lockings, and the one end of gear wheel assembly (1) inserts the cooperation with the dismantlement groove of big nut, and the other end of gear wheel assembly (1) is gear wheel ring (11), and a plurality of deflector (3) and the casing hole normal running fit that set up are passed through around its periphery in the middle part of gear wheel assembly (1), pinion assembly (2) are including apron (21), gear shaft (22), cover and are established pinion (23) outside gear shaft (22), the tip and casing terminal surface (5) fixed connection of apron (21) down, the middle part normal running fit of the one end of gear shaft (22) and apron (21) down, pinion (23) mesh with gear wheel ring (11) mutually.
2. The mechanism of claim 1 for assembling and disassembling a big nut of a stern shaft sealing device, wherein: the large gear assembly (1) further comprises a matching ring (12) which is coaxially arranged with the large gear ring (11), one side of the matching ring (12) is inserted and matched with a dismounting groove of a large nut through a convex block (13), the other side of the matching ring (12) is fixedly connected with the inner side surface of the large gear ring (11) through a rib (14), and the guide plate (3) is fixed at the top of the rib (14).
3. The mechanism of claim 1 for assembling and disassembling a big nut of a stern shaft sealing device, wherein:
pinion subassembly (2) still include at least one clamp plate subassembly (24), clamp plate subassembly (24) include clamp plate body (241), pilot pin (242), establish spring (243) on pilot pin (242), one side of clamp plate body (241) is provided with the portion of bending (2411) that contacts with the lateral surface of gear wheel ring (11), the one end of pilot pin (242) is passed through and is inserted the cooperation with lower apron (21) behind through-hole (2412) of seting up on clamp plate body (241), adjusting nut (244) butt that the other pot head of pilot pin (242) was established respectively in the both ends of spring (243).
4. The mechanism of claim 1 for assembling and disassembling a big nut of a stern shaft sealing device, wherein:
pinion subassembly (2) still include upper cover plate (25), the tip and the lower apron (21) fixed connection of upper cover plate (25), enclose between the middle part of upper cover plate (25) and lower apron (21) and close and form cavity (26) that hold pinion (23), the other end of gear shaft (22) passes upper cover plate (25) back and extends to the outside.
5. The mechanism of claim 4 for assembling and disassembling big nut of stern shaft sealing device, wherein: pinion subassembly (2) still include at least one clamp plate subassembly (24), clamp plate subassembly (24) include clamp plate body (241), pilot pin (242), establish spring (243) on pilot pin (242), one side of clamp plate body (241) is provided with the portion of bending (2411) that contacts with the lateral surface of gear wheel ring (11), the one end of pilot pin (242) is passed through and is inserted the cooperation with upper cover plate (25) behind through-hole (2412) of seting up on clamp plate body (241), adjusting nut (244) butt that the other pot head of spring (243) was established with clamp plate body (241), pilot pin (242) respectively.
6. The mechanism of claim 3 or 5, wherein the screw shaft seal device big nut is assembled and disassembled: the pressure plate assembly (24) further comprises a gasket (245) sleeved on the guide pin (242), and two sides of the gasket (245) are respectively in contact with the spring (243) and the adjusting nut (244).
7. The mechanism for dismounting the big nut of the stern shaft sealing device according to any one of claims 1 to 5, wherein: the width of the small gear (23) is more than or equal to the sum of the width of the wheel ring of the large gear ring (11) and the axial stroke of the wheel ring.
8. The mechanism for dismounting the big nut of the stern shaft sealing device according to any one of claims 1 to 5, wherein: the other end of the gear shaft (22) is of a hexagonal or square structure matched with the wrench (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111029504.2A CN113799056B (en) | 2021-09-03 | 2021-09-03 | Dismounting mechanism for big nut of stern shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111029504.2A CN113799056B (en) | 2021-09-03 | 2021-09-03 | Dismounting mechanism for big nut of stern shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113799056A CN113799056A (en) | 2021-12-17 |
| CN113799056B true CN113799056B (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111029504.2A Active CN113799056B (en) | 2021-09-03 | 2021-09-03 | Dismounting mechanism for big nut of stern shaft sealing device |
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| CN (1) | CN113799056B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10163282B4 (en) * | 2001-12-21 | 2005-06-09 | Visteon Global Technologies, Inc., Dearborn | Rack and pinion, in particular rack and pinion steering gear and method for its preparation |
| CN202388422U (en) * | 2011-11-26 | 2012-08-22 | 东南大学 | Separable reciprocating type spanner |
| CN203401456U (en) * | 2013-07-15 | 2014-01-22 | 上海通用汽车有限公司 | Device for detaching and installing pipeline nut |
| CN213616387U (en) * | 2020-09-27 | 2021-07-06 | 邯郸钢铁集团有限责任公司 | Fastening tool for narrow space part |
| CN112828799A (en) * | 2020-12-08 | 2021-05-25 | 中国石油天然气股份有限公司 | Dismounting device of bearing support |
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2021
- 2021-09-03 CN CN202111029504.2A patent/CN113799056B/en active Active
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| CN113799056A (en) | 2021-12-17 |
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