Tool for disassembling bolt of shaft system at flywheel of main engine

Abstract

The utility model discloses a disassembling tool for a shaft system bolt at a flywheel of a main engine. The disassembling tool comprises a pushing assembly and a pulling-out assembly. The pushing assembly is placed at the step position, opposite to a crankshaft flywheel, of the marine main engine crankshaft, the pushing end of the pushing assembly is horizontally and transversely arranged coaxially towards the corresponding shafting bolt, and then the corresponding shafting bolt is horizontally pushed rightwards by a certain distance through abutting contact between the pushing assembly and the threaded end of the corresponding shafting bolt. A gap is formed between the circular nut of the shafting bolt and the marine intermediate shaft; the pulling-out assembly is coaxially connected to the shafting bolt in a sleeving mode, the clamping end of the pulling-out assembly is coaxially clamped in the gap between the round nut and the marine intermediate shaft, then the pulling-out assembly and the corresponding shafting bolt are connected together, and then the shafting bolt is horizontally pulled out rightwards through the pulling-out assembly. On the premise that the shafting bolt is not damaged, the purpose of easily disassembling the shafting bolt in a pushing and pulling mode is achieved, the shafting bolt can be repeatedly used, and cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bolt dismounting tool, in particular to a main engine flywheel shafting bolt dismounting tool. BACKGROUND

[0002] Generally, the shafting bolt at the flywheel of the MAN S50ME-C main engine is designed with slight interference to ensure that the contact area of the shafting bolt and the through hole meets the requirements, because the force acting on the shafting bolt is mainly shear force. Currently, domestic shipyards generally use an interference of 0.005-0.01 mm, while our company uses an interference of 0-0.005 mm, and the bolt is installed by cold-embedding and then screwed with a nut at the threaded end of the bolt to achieve locking and fixing effects.

[0003] Since the bolt is installed by interference and cold-embedding, when the bolt needs to be dismounted during the ship repair stage, a large pulling-out force of about 2.7T is required, so a dismounting tool is needed. However, 1) the space between the flywheel and the main engine body is small, with only 91mm of operating distance, and there is a step at the hole center, which makes it impossible to place a conventional dismounting tool and thus impossible to knock out the shafting bolt; 2) the shafting bolt is a round nut, and the conventional dismounting tool cannot be effectively fixed with the round nut, so the bolt cannot be pulled out.

[0004] The general method currently adopted is to weld on the round nut to form a force point, then remove the nut, pull the force point, and then take out the shafting bolt. However, this method has the following defects: 1) the shafting bolt is special and has been specially treated, and once welded on the body, it will affect the material properties of the shafting bolt, so the shafting bolt must be scrapped; 2) the shafting bolt is a product approved by the ship classification society, and the cost of re-purchasing is large, and this method is a destructive dismounting method that will increase the cost of the ship owner. Therefore, how to effectively dismount the shafting bolt without damaging it has become a difficult problem to be solved. SUMMARY

[0005] The utility model solves the technical problem of providing a main engine flywheel shafting bolt dismounting tool, which can easily dismount the shafting bolt by pushing and pulling without damaging the shafting bolt, and the shafting bolt can be repeatedly used, saving costs.

[0006] To solve the above technical problems, the utility model discloses the following technical scheme: a kind of main engine flywheel shafting bolt dismounting tool of the utility model, including marine main engine crankshaft, crank flywheel and marine intermediate shaft;The crank flywheel coaxial sleeve joint is installed on the right side of the marine main engine crankshaft being arranged horizontally and transversely, and the marine main engine crankshaft is coaxially butted with the marine intermediate shaft left and right, and after being installed by interference and cold-embedding between the two, the shafting bolt is locked by locking nut again;Its innovation point is that: it further includes pushing assembly and pulling-out assembly;The pushing assembly is placed on the step position of crank flywheel relative to the marine main engine crankshaft, and its pushing end is arranged horizontally and transversely to the coaxial heart of corresponding shafting bolt, and then it is contacted by the threaded end of corresponding shafting bolt, corresponding shafting bolt is pushed horizontally and right out a distance, and gap is generated between the round nut of shafting bolt and marine intermediate shaft;The pulling-out assembly is coaxially sleeved on the shafting bolt, and its clamping end is coaxially clamped in the gap between round nut and marine intermediate shaft, and then pulling-out assembly and corresponding shafting bolt are connected together, and shafting bolt is pulled out horizontally and right by pulling-out assembly.

[0007] Preferably, the pushing assembly includes a support plate, a jack seat, a thin jack, and a stroke adjustment rod. The support plate is vertically and longitudinally arranged in a rectangular structure, and its lower end surface matches the step at the crank flywheel, so that the support plate is placed in alignment on the step at the crank flywheel to offset the influence of the step at the crank flywheel. A jack seat is vertically screwed on the right side surface of the support plate, which is arranged in close proximity to the step at the crank flywheel, and its lower end surface is supported on the marine main engine crankshaft. A thin jack is vertically and longitudinally arranged on the right side surface of the jack seat, with its piston coaxially arranged with the corresponding shafting bolt, and its fixed end is screwed and fixed with the jack seat. The stroke adjustment rod is horizontally and transversely placed between the piston of the thin jack and the threaded end of the corresponding shafting bolt, with its two ends in close contact with the piston of the thin jack and the threaded end of the corresponding shafting bolt, respectively. Under the drive of the piston of the thin jack, the stroke adjustment rod pushes the shafting bolt out a distance horizontally and to the right after the locking nut is removed, thereby generating a gap between the round nut of the corresponding shafting bolt and the marine intermediate shaft.

[0008] Preferably, a step-shaped groove matching the step at the crank flywheel is vertically embedded on the lower end surface of the support plate, and the step-shaped groove vertically penetrates the left and right side surfaces of the support plate. The support plate is aligned and butted with the step at the crank flywheel through the step-shaped groove, thereby offsetting the influence of the step at the crank flywheel on the placement of the jack seat.

[0009] Preferably, the thin jack adopts the model RTC-02010, and its pushing stroke is 10 mm.

[0010] Preferably, the threaded end of the shafting bolt is arranged at the end thereof, and the outer diameter of the threaded end is smaller than the outer diameter of the screw rod portion of the shafting bolt.

[0011] Preferably, the pulling-out assembly comprises an upper clamping plate, a lower clamping plate and a connecting plate; the upper clamping plate and the lower clamping plate are both hollow semi-cylinders arranged horizontally and transversely, and are coaxially aligned and fitted one above the other, and are spliced into a clamping mechanism arranged horizontally and transversely; the connecting plate is vertically and longitudinally fitted on the right side surface of the upper clamping plate and the lower clamping plate, and is screwed and fixed with the upper clamping plate and the lower clamping plate respectively, thereby fixing and connecting the upper clamping plate and the lower clamping plate together; a semicircular groove is coaxially embedded on the left end surface of the upper clamping plate, the radius of the semicircular groove is greater than the radius of the screw rod portion of the shafting bolt, and is smaller than the radius of the circular nut of the shafting bolt, and the left end wall thickness of the upper clamping plate is matched with the gap between the circular nut and the marine intermediate shaft; a semicircular groove is coaxially embedded on the left end surface of the lower clamping plate, the radius of the semicircular groove is greater than the radius of the screw rod portion of the shafting bolt, and is smaller than the radius of the circular nut of the shafting bolt, and the left end wall thickness of the lower clamping plate is matched with the gap between the circular nut and the marine intermediate shaft, thereby clamping the circular nut of the shafting bolt in the gap between the left end of the upper clamping plate and the left end of the lower clamping plate.

[0012] Preferably, the pulling-out assembly further comprises a cover, a lead screw and an adjusting nut; the cover is a hollow cylindrical structure arranged horizontally and transversely, and the left side surface thereof is open, the inside of the cover is matched with the clamping mechanism, and is coaxially sleeved on the upper clamping plate and the lower clamping plate, and the left side surface thereof is abutted with the marine intermediate shaft; the cover coaxially covers the upper clamping plate, the lower clamping plate and the connecting plate inside, and a lead screw is coaxially arranged horizontally and transversely between the connecting plate and the right inner side surface of the cover inside the cover, the left end of the lead screw is coaxially rotationally connected with the right side surface of the connecting plate, and the right end thereof coaxially penetrates out of the right outer side surface of the cover; the cover does not interfere with the rotation of the lead screw, and an adjusting nut is screwed on the lead screw relative to the right side of the cover, the adjusting nut is fitted with the right outer side surface of the cover, and when the cover is held, the lead screw is moved horizontally and to the right by rotating the adjusting nut with a wrench, and the corresponding shafting bolt is pulled out by the cooperation of the upper clamping plate and the lower clamping plate.

[0013] Preferably, the stroke of the connecting plate moving horizontally to the right in the cover along with the lead screw needs to ensure that the corresponding shafting bolt is pulled out of the marine intermediate shaft.

[0014] The utility model discloses beneficial effect: the utility model discloses the premise of not destroying the shafting bolt, through the way of push + pull reaches the purpose of easily disassembling the shafting bolt, and the shafting bolt can be repeatedly used, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment needed to use the drawing briefly introduces, obviously, the drawing in the following description only is some embodiment in the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0016] Figure 1 It is the state schematic view of the utility model preparation top axle system bolt.

[0017] Figure 2 It is the state schematic view of the utility model top axle system bolt.

[0018] Figure 3 It is the state schematic view of the utility model preparation pull axle system bolt.

[0019] Figure 4 It is the state schematic view of the utility model pull axle system bolt.

[0020] Wherein, 1-ship main engine crankshaft;2-crankshaft flywheel place step;3-crankshaft flywheel;4-ship intermediate shaft;5-axle system bolt;6-locking nut;7-supporting plate;8-jack base;9-thin jack;10-stroke adjusting rod;11-upper clamping plate;12-lower clamping plate;13-connection plate;14-screw;15-housing;16-adjusting nut. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be clearly and completely described below through specific embodiments.

[0022] The utility model discloses a kind of main engine flywheel place axle system bolt dismounting tools, including ship main engine crankshaft 1, crankshaft flywheel 3 and ship intermediate shaft 4;Crank flywheel coaxial sleeve installation is set to the right side on horizontal transverse ship main engine crankshaft 1, and ship main engine crankshaft 1 and ship intermediate shaft 4 are coaxially butted left and right, and the locking of axle system bolt 5 is carried out after being installed again by locking nut 6 through the interference of axle system bolt 5 and cold-embedding;Wherein, the threaded end of axle system bolt 5 is arranged at its end, and the threaded end outer diameter is less than the screw rod portion outer diameter of axle system bolt 5;Specific structure is as shown in Figures 1-4As shown, the pushing assembly is placed on the marine main engine crankshaft 1 at the step 2 position relative to the crankshaft flywheel, and the pushing end is horizontally transversely arranged coaxially with the corresponding shafting bolt 5, so that the corresponding shafting bolt 5 is horizontally pushed out a distance by the threaded end of the shafting bolt 5 in abutting contact, and a gap is generated between the circular nut of the shafting bolt 5 and the marine intermediate shaft 4.

[0023] The pushing assembly comprises a supporting plate 7, a jack base 8, a thin jack 9 and a stroke adjusting rod 10. Figure 1 、 Figure 2 As shown, the supporting plate 7 is vertically longitudinally arranged in a rectangular structure, and the lower end surface thereof is matched with the step 2 at the crankshaft flywheel, so that the supporting plate 7 is placed in alignment on the step 2 at the crankshaft flywheel to offset the influence of the step 2 at the crankshaft flywheel.

[0024] As shown, the jack base 8 is vertically screwed on the right side surface of the supporting plate 7 and is closely arranged with the step 2 at the crankshaft flywheel, and the lower end surface thereof is supported on the marine main engine crankshaft 1. Figure 1 、 Figure 2 As shown, the thin jack 9 is vertically longitudinally arranged on the right side surface of the jack base 8, and the piston of the thin jack 9 is coaxially arranged with the corresponding shafting bolt 5, and the fixed end thereof is screwed and fixed with the jack base 8.

[0025] The pulling-out assembly is coaxially sleeved on the shafting bolt 5, and the clamping end is coaxially clamped in the gap between the circular nut and the marine intermediate shaft 4, so that the pulling-out assembly and the corresponding shafting bolt 5 are connected together, and the shafting bolt 5 is horizontally pulled out to the right through the pulling-out assembly. Figure 3 、 Figure 4As shown in the drawings, the upper clamping plate 11 and the lower clamping plate 12 are hollow semicylinders arranged horizontally and transversely, and the upper clamping plate 11 and the lower clamping plate 12 are coaxially aligned and matched, and are spliced into a clamping mechanism arranged horizontally and transversely; the connecting plate 13 is vertically and longitudinally arranged on the right side of the upper clamping plate 11 and the lower clamping plate 12, and is respectively screw-connected and fixed with the upper clamping plate 11 and the lower clamping plate 12, thereby fixing and connecting the upper clamping plate 11 and the lower clamping plate 12 together; a semicircular groove is coaxially embedded on the left end face of the upper clamping plate 11, the radius of the semicircular groove is greater than the radius of the screw rod part of the shafting bolt 5, and is less than the radius of the circular nut of the shafting bolt 5, and the gap between the left end wall thickness of the upper clamping plate 11 and the circular nut and the marine intermediate shaft 4 is matched; a semicircular groove is coaxially embedded on the left end face of the lower clamping plate 12, the radius of the semicircular groove is greater than the radius of the screw rod part of the shafting bolt 5, and is less than the radius of the circular nut of the shafting bolt 5, and the gap between the left end wall thickness of the lower clamping plate 12 and the circular nut and the marine intermediate shaft 4 is matched, thereby the left end of the upper clamping plate 11 and the left end of the lower clamping plate 12 are coaxially clamped in the gap between the circular nut and the marine intermediate shaft 4, and the circular nut of the shafting bolt 5 is held.

[0026] As Figure 3 , Figure 4 shown, the cover 15 is a hollow cylindrical structure arranged horizontally and transversely, and the left side thereof is open, the inside of the cover 15 is matched with the clamping mechanism, and is coaxially sleeved on the upper clamping plate 11 and the lower clamping plate 12, and the left side thereof is abutted with the marine intermediate shaft 4; the cover 15 coaxially covers the upper clamping plate 11, the lower clamping plate 12 and the connecting plate 13 inside, and a lead screw 14 is coaxially arranged horizontally and transversely between the connecting plate 13 and the right inner side of the cover 15 inside the cover 15, the left end of the lead screw 14 is coaxially rotationally connected with the right side of the connecting plate 13, and the right end thereof coaxially penetrates the right outer side of the cover 15; the cover 15 does not interfere with the rotation of the lead screw 14, and an adjusting nut 16 is screw-connected on the lead screw 14 relative to the right side of the cover 15, the adjusting nut 16 is matched with the right outer side of the cover 15, and when the cover 15 is held, the lead screw 14 is horizontally and rightwardly moved by rotating the adjusting nut 16 with a wrench, and the corresponding shafting bolt 5 is pulled out through the cooperation of the upper clamping plate 11 and the lower clamping plate 12; wherein the stroke of the connecting plate 13 moving rightwardly in the cover 15 along with the lead screw 14 needs to ensure that the corresponding shafting bolt 5 is pulled out of the marine intermediate shaft 4.

[0027] The working principle of the utility model:

[0028] When the shafting bolt 5 needs to be disassembled, the corresponding locking nut 6 is first removed, then the push assembly is placed on the marine main engine crankshaft 1 at the step 2 position relative to the crankshaft flywheel, and the support plate 7 is used to offset the influence of the step 2 of the crankshaft flywheel on the placement of the jack base 8;

[0029] Then, under the driving of the piston of the thin jack 9, the shafting bolt 5 is pushed out horizontally and laterally to the right by a distance through the stroke adjusting rod 10, and a gap is generated between the corresponding shafting bolt 5 and the marine intermediate shaft 4.

[0030] Then, the left end of the upper clamping plate 11 is clamped upward from the upper side of the corresponding shafting bolt 5 into the corresponding gap, and the left end of the lower clamping plate 12 is clamped upward from the lower side of the corresponding shafting bolt 5 into the corresponding gap, so that the round nut of the shafting bolt 5 is clamped by the cooperation of the upper clamping plate 11 and the lower clamping plate 12, and the upper clamping plate 11 and the lower clamping plate 12 are fixedly connected together through the connecting plate 13; then, the shell 15 is coaxially sleeved on the upper shell, the lower shell and the connecting plate 13, and the left side surface of the shell 15 abuts against the marine intermediate shaft 4, and the lead screw 14 is coaxially penetrated through the right outer side surface of the shell 15; then, the adjusting nut 16 is screwed on the lead screw 14 relative to the right side of the shell 15, at this time, the shell 15 is pressed, and the lead screw 14 is moved horizontally and laterally to the right by rotating the adjusting nut 16 through a wrench, so that the corresponding shafting bolt 5 is pulled out.

[0031] The utility model has the advantages that: under the premise of not damaging the shafting bolt 5, the shafting bolt 5 can be easily disassembled through the pushing and pulling mode, and the shafting bolt 5 can be repeatedly used, so that the cost is saved.

[0032] The above-described embodiments are merely preferred embodiments of the utility model, and do not limit the design concept and scope of the utility model, and various modifications and improvements of the technical scheme of the utility model made by the ordinary engineering technicians in the art shall fall within the protection scope of the utility model, and the technical content of the utility model claimed for protection has been recorded in the technical requirements.

Claims

1. A main engine flywheel shaft bolt dismounting tool, comprising a marine main engine crankshaft, a crankshaft flywheel and a marine intermediate shaft; the crankshaft flywheel is coaxially sleeved on the right side of the horizontally transversely arranged marine main engine crankshaft, and the marine main engine crankshaft and the marine intermediate shaft are coaxially connected on the left and right, and the shaft bolt is locked through the locking nut after the shaft bolt is installed through interference and cold embedding; characterized in that: The application also comprises a pushing assembly and a pulling-out assembly; the pushing assembly is placed on the crankshaft of the marine engine at the step position relative to the flywheel, and the pushing end of the pushing assembly is horizontally transversely arranged coaxially with the corresponding shaft bolt, so that the corresponding shaft bolt is horizontally pushed out a distance by the abutting contact between the pushing assembly and the threaded end of the corresponding shaft bolt, and a gap is generated between the round nut of the shaft bolt and the marine intermediate shaft; the pulling-out assembly is coaxially sleeved on the shaft bolt, and the clamping end of the pulling-out assembly is coaxially clamped in the gap between the round nut and the marine intermediate shaft, so that the pulling-out assembly and the corresponding shaft bolt are connected together, and then the shaft bolt is horizontally pulled out by the pulling-out assembly.

2. A master flywheel at shafting bolt dismounting tool according to claim 1, characterized in that: The pushing assembly comprises a support plate, a jack base, a thin jack and a stroke adjusting rod; the support plate is vertically longitudinally arranged in a rectangular structure, and the lower end surface of the support plate is matched with the step at the flywheel of the crankshaft, so that the support plate is placed in alignment on the step at the flywheel of the crankshaft to offset the influence of the step at the flywheel; the jack base is vertically screwed on the right side surface of the support plate, and the jack base is arranged in close contact with the step at the flywheel of the crankshaft, and the lower end surface of the jack base is supported on the crankshaft of the marine engine; the thin jack is vertically longitudinally arranged on the right side surface of the jack base, and the piston of the thin jack is coaxially arranged with the corresponding shaft bolt, and the fixed end of the thin jack is screwed with the jack base; the stroke adjusting rod is horizontally placed between the piston of the thin jack and the threaded end of the corresponding shaft bolt, and the two ends of the stroke adjusting rod are in abutting contact with the piston of the thin jack and the threaded end of the corresponding shaft bolt, respectively, and under the drive of the piston of the thin jack, the shaft bolt after the locking nut is removed is horizontally pushed out a distance to the right by the stroke adjusting rod, so that a gap is generated between the round nut of the corresponding shaft bolt and the marine intermediate shaft.

3. A master flywheel at shafting bolt dismounting tool according to claim 2, characterized in that: A step-shaped groove matched with the step at the flywheel of the crankshaft is vertically embedded in the lower end surface of the support plate, and the step-shaped groove vertically penetrates through the left and right side surfaces of the support plate; the support plate is aligned and connected with the step at the flywheel of the crankshaft through the step-shaped groove, so as to offset the influence of the step at the flywheel of the crankshaft on the placement of the jack base.

4. A master flywheel at shafting bolt dismounting tool according to claim 2, characterized in that: The model of the thin jack is RTC-02010, and the pushing stroke is 10mm.

5. A master flywheel at shafting bolt dismounting tool according to claim 1, characterized in that: The threaded end of the shaft bolt is arranged at the end portion of the shaft bolt, and the outer diameter of the threaded end is smaller than the outer diameter of the screw portion of the shaft bolt.

6. A master flywheel at shafting bolt disassembly tool according to claim 1, characterized in that: The pulling-out assembly comprises an upper clamping plate, a lower clamping plate and a connecting plate; the upper clamping plate and the lower clamping plate are hollow semicylinders arranged horizontally and transversely, and are coaxially aligned and attached to each other, and are spliced into a clamping mechanism arranged horizontally and transversely; the connecting plate is vertically and longitudinally attached to the right side of the upper clamping plate and the lower clamping plate, and is screw-fixed with the upper clamping plate and the lower clamping plate respectively, thereby fixing and connecting the upper clamping plate and the lower clamping plate together; a semicircular groove is coaxially embedded in the left end surface of the upper clamping plate, the radius of the semicircular groove is greater than the radius of the screw rod part of the shaft bolt, and is less than the radius of the circular nut of the shaft bolt, and the gap between the left end wall thickness of the upper clamping plate and the circular nut and the marine intermediate shaft is matched; a semicircular groove is coaxially embedded in the left end surface of the lower clamping plate, the radius of the semicircular groove is greater than the radius of the screw rod part of the shaft bolt, and is less than the radius of the circular nut of the shaft bolt, and the gap between the left end wall thickness of the lower clamping plate and the circular nut and the marine intermediate shaft is matched, thereby clamping the circular nut of the shaft bolt in the gap between the left end of the upper clamping plate and the left end of the lower clamping plate and the marine intermediate shaft.

7. A master flywheel at shafting bolt disassembly tool according to claim 6, characterized in that: It also comprises a cover, a lead screw and an adjusting nut; the cover is a hollow cylindrical structure arranged horizontally and transversely, and its left side is open, the inside of the cover is matched with the clamping mechanism, and is coaxially sleeved on the upper clamping plate and the lower clamping plate, and ensures that its left side abuts against the marine intermediate shaft; the cover coaxially covers the upper clamping plate, the lower clamping plate and the connecting plate inside, and a lead screw is coaxially arranged horizontally and transversely between the connecting plate and the right inner side of the cover inside the cover, the left end of the lead screw is coaxially rotationally connected with the right side of the connecting plate, and its right end coaxially penetrates the right outer side of the cover; the cover does not interfere with the rotation of the lead screw, and an adjusting nut is screw-connected on the lead screw relative to the right side of the cover, the adjusting nut is attached to the right outer side of the cover, and when the cover is held, the lead screw moves horizontally and rightward by rotating the adjusting nut with a wrench, and the corresponding shaft bolt is pulled out by the cooperation of the upper clamping plate and the lower clamping plate.

8. A master flywheel at shafting bolt dismounting tool according to claim 7, characterized in that: The travel of the connecting plate horizontally moving rightward in the cover with the lead screw needs to ensure that the corresponding shaft bolt is pulled out of the marine intermediate shaft.

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