CN115383677A - Positioning pin dismounting device for aerospace engine and using method thereof - Google Patents
Positioning pin dismounting device for aerospace engine and using method thereof Download PDFInfo
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- CN115383677A CN115383677A CN202211343192.7A CN202211343192A CN115383677A CN 115383677 A CN115383677 A CN 115383677A CN 202211343192 A CN202211343192 A CN 202211343192A CN 115383677 A CN115383677 A CN 115383677A
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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
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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Abstract
The invention discloses a positioning pin dismounting device for an aerospace engine and a using method thereof, belonging to the technical field of aerospace engine equipment production; including last a section of thick bamboo, be located and be provided with a centering section of thick bamboo under a section of thick bamboo, centering section of thick bamboo below with axle center fixed mounting have a centering plectane, the center of centering plectane is provided with the centering hole, is provided with the dismantlement pipe on the central axis direction in centering hole, dismantlement pipe upper end and last a section of thick bamboo fixed connection, the lower extreme detachable of dismantling the pipe installs the screw thread head, the surface of screw thread head is provided with the screw thread, the screw thread head be used for dismantling the hollow locating pin of installing on the locating part. According to the invention, the centering barrel is arranged to complete centering of the hollow positioning pin, so that when the hollow positioning pin is disassembled, the hollow positioning pin and the thread head can be ensured not to deflect, and the surface and the internal structure of a positioning part are effectively prevented from being damaged.
Description
Technical Field
The invention belongs to the technical field of aerospace engine equipment production, and particularly relates to a positioning pin dismounting device for an aerospace engine and a using method thereof.
Background
An aerospace engine (hereinafter referred to as an engine) is used as a highly complex and precise mechanical device, and is mainly used for providing sufficient power for flying of an aircraft. The engine is the most important part in the production process of the airplane, and the performance quality of the engine directly influences the overall quality of the airplane.
In the production and manufacturing process of the engine, the manufacturing and assembly of high-precision mechanical parts such as a casing, guide blades, a low-pressure turbine disc, compressor blades and the like are included; as a high-precision and high-quality mechanical device, the installation precision of each part is often required to be ensured by installing hollow positioning pins during assembly and use, so that the final installation precision of an engine can be ensured.
The engine is worn in the using process, regular maintenance and repair are needed, and all parts in the engine need to be disassembled at the moment, wherein the disassembly of the hollow positioning pin used in the installation process is included. Because each part in the engine is a high-precision or even a thin-wall part, in the process of disassembling the hollow positioning pin, special attention needs to be paid to not damage the part to be positioned and installed, and once the surface of the part is damaged, the overall performance of the part is affected. Meanwhile, in the dismounting process, the force application direction during dismounting the hollow positioning pin needs to be kept uniform, and unbalance loading cannot occur between the hollow positioning pin and the positioned part, so that the internal structure of the positioned part can be influenced, the mounting hole of the hollow positioning pin can be damaged, and the damage of parts is caused, and the manufacturing cost of high-precision parts is extremely high, so that when the positioning pin is dismounted, the uniform stress of the hollow positioning pin needs to be ensured, and the mounting holes of the positioned part and the hollow positioning pin cannot be damaged; and the mounting mode of the positioning pin is generally interference fit or transition fit, so that the convenience of force application of a human body is ensured during disassembly.
Chinese patent publication No. CN109590670B discloses a method for replacing a blind hole positioning pin of a low-pressure turbine disc of an aircraft engine, which is to drill a positioning hole on the surface of the positioning pin by a bench worker, then drill a hole on the positioning pin by a drill, remove the residual positioning pin by a milling cutter, specifically install the milling cutter on a rocker drill, and insert the milling cutter into the drilled hole of the positioning pin, thereby finally realizing the replacement of the positioning pin. Although the positioning pin can be replaced, the positioning pin is solid, and when the positioning pin is replaced, equipment such as a rocker arm drill is needed, so that large parts need to be conveyed to the vicinity of the equipment such as the rocker arm drill, the workload is increased, and the surface and the internal structure of the positioned part cannot be guaranteed not to be damaged. Aiming at the problems, the invention provides a device for disassembling a positioning pin for an aerospace engine.
Disclosure of Invention
Aiming at the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a locating pin dismounting device for aerospace engine, includes a last section of thick bamboo, is located a section of thick bamboo and is provided with a centering section of thick bamboo under, centering section of thick bamboo below with axle center fixed mounting have a centering plectane, the center of centering plectane is provided with the centering hole, is provided with the dismantlement pipe on the central axis direction in centering hole, dismantlement pipe upper end and last section of thick bamboo fixed connection, the lower extreme detachable who dismantles the pipe installs the screw thread head, the surface of screw thread head is provided with the screw thread, the screw thread head be used for dismantling the hollow locating pin of installing on the locating part.
Furthermore, a first cylindrical hole is formed above the centering barrel and connected with an outer ring of a bearing, an inner ring of the bearing is connected with a first disc, two stand columns are fixedly mounted above the first disc and provided with a plurality of spherical bosses, the stand columns are in sliding fit with the inner wall of a hollow tube, the hollow tube is fixedly mounted on a second disc, a plurality of limiting holes are formed in the hollow tube, a first reset spring is arranged between the stand columns and the hollow tube, the spherical bosses are in sliding fit with the limiting holes, the second disc is mounted below a third disc, and the third disc is fixedly mounted below an upper barrel.
Furthermore, a cylindrical hole III is formed in the center of the disc II, a cylindrical hole II is formed in the center of the disc I, the dismounting pipe penetrates through the cylindrical hole II and the cylindrical hole III, the dismounting pipe is in sliding fit with the cylindrical hole II, and the central axes of the dismounting pipe, the cylindrical hole III and the cylindrical hole II are overlapped.
Furthermore, two guide grooves I are symmetrically arranged on the centering barrel, a straight rod is slidably mounted on the guide grooves I, a plurality of teeth are arranged on the straight rod, the upper end of the straight rod is in sliding fit with the lower end of the disc III, and a second reset spring is arranged between the lower end of the straight rod and the guide grooves I.
Furthermore, two the tooth that sets up on the straight-bar respectively with two elevating gear meshing cooperations, elevating gear fixed mounting in the pivot, the pivot pass two shaft holes that set up on the last section of thick bamboo and with shaft hole normal running fit, one of pivot serve fixedly connected with hand wheel.
Furthermore, the dismounting pipe on fixed mounting have a ratchet, the ratchet with the meshing cooperation of the one end of pawl, the pawl other end rotate and install on the sliding block, pawl and sliding block between be provided with reset spring three, sliding block slidable mounting between two gag lever posts, gag lever post fixed mounting on the deflector, the deflector be connected with disc three.
Furthermore, the sliding block on keep away from and be provided with the slip post on the face of pawl, slip post and sliding plate set up the first sliding fit of rectangular channel that sets up, sliding plate and the second sliding fit of guide way that sets up on the deflector, the sliding plate on fixed mounting have the one end of pull rod, the pull rod other end pass the rectangular channel two on the upper barrel and be connected with the crank rotation, the crank be connected with the mounting bracket, logical groove and the mounting bracket sliding connection that set up on the crank, mounting bracket fixed mounting on the upper barrel.
Furthermore, the below of dismantlement pipe be provided with four rectangular channels three, three last normal running fit of rectangular channel change the piece, spacing change piece and rectangular channel between three and be provided with the torsional spring, the lower extreme fixed mounting of dismantlement pipe have the frid, frid and screw thread head threaded connection.
A use method of a positioning pin dismounting device for an aerospace engine comprises the following specific steps:
the first step is as follows: the screw head is installed below the dismantling pipe.
The second step: and (3) holding the centering barrel by hand, so that a centering hole on a centering circular plate positioned below the centering barrel is attached to the outer wall of the hollow positioning pin, and meanwhile, the screw head is positioned right above the hollow positioning pin.
The third step: the dismounting pipe is made to do circular motion, and the threaded head is screwed into the hollow positioning pin through the dismounting pipe.
The fourth step: the hand wheel is rotated to drive the rotating shaft and the lifting gear on the rotating shaft to rotate, the straight rod is pushed upwards through the lifting gear, and therefore the upper barrel and the dismounting pipe are pushed upwards through the lifting gear, and the hollow positioning pin is pulled out of the positioning part.
Compared with the prior art, the invention has the beneficial effects that: (1) According to the invention, the centering barrel is arranged to complete centering of the hollow positioning pin, so that when the hollow positioning pin is disassembled, the hollow positioning pin and the thread head can be ensured not to deflect, and the surface and the internal structure of a positioning part are effectively prevented from being damaged; (2) According to the invention, the crank and the mounting frame are arranged, and the rotation of the dismounting pipe and the threaded head is controlled by the crank, so that a worker can apply force to the threaded head and the hollow positioning pin more easily during operation, and the hollow positioning pin can be dismounted better; (3) In the process that the threaded head is screwed into the hollow positioning pin, the crank for applying force can rotate around the central axis of the dismounting pipe, so that the movement direction of the threaded head is limited to a great extent, the stress balance of the hollow positioning pin and the positioning part is ensured, the threaded head and the hollow positioning pin are prevented from being deviated, and the positioning part is prevented from being damaged due to the deviation of the hollow positioning pin; (4) The threaded head is detachably arranged below the dismounting pipe, and can be replaced in time after the threaded head is worn without replacing the dismounting pipe.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is another angular elevation view of fig. 1.
Fig. 3 is a left side view of fig. 2.
Figure 4 is a schematic view of the present invention in use,
fig. 5 is a schematic view of a part a of the enlarged structure in fig. 4.
Fig. 6 is a schematic view of a part of an enlarged structure at C in fig. 4.
Fig. 7 is a schematic view of a part B of fig. 4.
FIG. 8 is a schematic view of a portion of the present invention.
Fig. 9 is a partial cross-sectional view of a portion of the structure of the present invention.
Fig. 10 is a schematic view of a part of an enlarged structure at D in fig. 9.
FIG. 11 is a partial structural cross-sectional view of the second disc and the hollow tube.
Fig. 12 is a sectional view of the disassembled tube.
Fig. 13 is a schematic view of a part of an enlarged structure at E in fig. 12.
Fig. 14 is a schematic view of the structure of the centering cylinder.
Reference numerals: 1, feeding a cylinder; 2-a centering cylinder; 3-centering the circular plate; 4-centering the hole; 5-disassembling the pipe; 6-thread head; 7-a hollow locating pin; 8, forming a first cylindrical hole; 9-a bearing; 10-disc one; 11-upright post; 12-a second cylindrical hole; 13-a spherical boss; 14-a hollow tube; 15-limiting holes; 16-disc two; 17-cylindrical hole three; 18-a first return spring; 19-guide groove one; 20-straight rod; 21-a second return spring; 22-tooth; 23-disc three; 24-a ratchet wheel; 25-a pawl; 26-a slider; 27-a limiting rod; 28-a guide plate; 29-a sliding plate; 30-a rectangular groove I; 31-guide groove two; 32-a pull rod; 33-a third return spring; 34-a sliding column; 35-a crank; 36-a mounting frame; 37-a rectangular groove II; 38-a rotating shaft; 39-round holes; 40-lifting gear; 41-hand wheel; 42-axle hole; 43-rectangular groove three; 44-limiting rotary block; 45-torsion spring; 46-a thread plate; 47-positioning parts; 48-a handle; 49-screw one; and 50-screw II.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The drawings are only for purposes of illustration and are only schematic and non-limiting, and certain elements of the drawings may be omitted, enlarged or reduced to better illustrate the embodiments of the present invention and not to represent the actual product size, and certain well-known structures in the drawings and descriptions thereof may be omitted for those skilled in the art.
Example (b): as shown in fig. 1 to 14, the positioning pin dismounting device for the aerospace engine comprises an upper barrel 1, a centering barrel 2 is arranged under the upper barrel 1, a centering circular plate 3 is coaxially and fixedly mounted under the centering barrel 2, a centering hole 4 is formed in the center of the centering circular plate 3, a dismounting pipe 5 is arranged in the direction of the central axis of the centering hole 4, the upper end of the dismounting pipe 5 is fixedly connected with the upper barrel 1, a threaded head 6 is detachably mounted at the lower end of the dismounting pipe 5, threads are arranged on the outer surface of the threaded head 6, and the threaded head 6 is used for dismounting a hollow positioning pin 7 mounted on a positioning part 47.
The top of a centering section of thick bamboo 2 is provided with cylinder hole 8, cylinder hole 8 is connected with the outer lane of bearing 9, the inner circle and disc 10 of bearing 9 are connected, the top fixed mounting of disc 10 has two stands 11, be provided with a plurality of spherical boss 13 on the stand 11, the inner wall sliding fit of stand 11 and hollow tube 14, hollow tube 14 fixed mounting is on two 16 of disc, be provided with a plurality of spacing holes 15 on the hollow tube 14, be provided with reset spring 18 between stand 11 and the hollow tube 14, spherical boss 13 and spacing hole 15 sliding fit, two 16 of disc install the below at three 23 of disc, three 23 of disc fixed mounting is in the below of last section of thick bamboo 1.
The center of the second disc 16 is provided with a third cylindrical hole 17, the center of the first disc 10 is provided with a second cylindrical hole 12, the dismounting pipe 5 penetrates through the second cylindrical hole 12 and the third cylindrical hole 17, the dismounting pipe 5 is in sliding fit with the second cylindrical hole 12, and the central axes of the dismounting pipe 5, the third cylindrical hole 17 and the second cylindrical hole 12 are overlapped.
Two first guide grooves 19 are symmetrically arranged on the centering barrel 2, a straight rod 20 is slidably mounted on the first guide grooves 19, a plurality of teeth 22 are arranged on the straight rod 20, the upper end of the straight rod 20 is in sliding fit with the lower end of the third disc 23, and a second return spring 21 is arranged between the lower end of the straight rod 20 and the first guide grooves 19.
The teeth 22 arranged on the two straight rods 20 are respectively engaged with the two lifting gears 40, the lifting gears 40 are fixedly arranged on the rotating shaft 38, the rotating shaft 38 passes through two shaft holes 42 arranged on the upper barrel 1 and is in running fit with the shaft holes 42, and one end of the rotating shaft 38 is fixedly connected with a hand wheel 41.
The dismounting pipe 5 is fixedly provided with a ratchet wheel 24, the ratchet wheel 24 is meshed and matched with one end of a pawl 25, the other end of the pawl 25 is rotatably arranged on a sliding block 26, a return spring III 33 is arranged between the pawl 25 and the sliding block 26, the sliding block 26 is slidably arranged between two limiting rods 27, the limiting rods 27 are fixedly arranged on a guide plate 28, and the guide plate 28 is connected with a disc III 23.
The surface of the sliding block 26 far away from the pawl 25 is provided with a sliding column 34, the sliding column 34 is in sliding fit with a first rectangular groove 30 arranged on the sliding plate 29, the sliding plate 29 is in sliding fit with a second rectangular groove 31 arranged on the guide plate 28, one end of a pull rod 32 is fixedly arranged on the sliding plate 29, the other end of the pull rod 32 penetrates through a second rectangular groove 37 arranged on the upper barrel 1 and is rotatably connected with a crank 35, the crank 35 is connected with a mounting frame 36, a through groove arranged on the crank 35 is in sliding connection with the mounting frame 36, and the mounting frame 36 is fixedly arranged on the upper barrel 1.
The below of dismantling pipe 5 is provided with three 43 of four rectangular channels, and the last normal running fit of three 43 of rectangular channels has spacing commentaries on classics piece 44, is provided with torsional spring 45 between spacing commentaries on classics piece 44 and the three 43 of rectangular channels, and the lower extreme fixed mounting who dismantles pipe 5 has thread plate 46, thread plate 46 and thread head 6 threaded connection.
A use method of a positioning pin dismounting device for an aerospace engine comprises the following specific steps:
the first step is as follows: installing a screw head 6 below the dismounting pipe 5;
the second step: the centering cylinder 2 is held by hand, so that a centering hole 4 on a centering circular plate 3 positioned below the centering cylinder 2 is attached to the outer wall of a hollow positioning pin 7, and a thread head 6 is positioned right above the hollow positioning pin 7;
the third step: the dismounting pipe 5 is made to do circular motion, and the threaded head 6 is screwed into the hollow positioning pin 7 through the dismounting pipe 5;
the fourth step: the hand wheel 41 is rotated, so that the hand wheel 41 drives the rotating shaft 38 and the lifting gear 40 on the rotating shaft 38 to rotate, the straight rod 20 is pushed upwards through the lifting gear 40, the upper barrel 1 and the dismounting pipe 5 are pushed upwards through the lifting gear 40, and the hollow positioning pin 7 is pulled out of the positioning part 47.
The working principle is as follows: when dismantling the hollow locating pin 7 on the locating part 47, at first need install the thread head 6 on the dismounting pipe 5, specifically, thread head 6 and the thread plate 46 screw-thread fit of dismounting pipe 5 below, be about to screw the thread head 6 in the thread plate 46, make the upper surface of thread head 6 and the lower surface contact of thread plate 46, accomplish the installation of thread head 6, so set up the thread head 6 and dismounting pipe 5 into detachable form, because the thread head 6 belongs to the vulnerable part, when the damage appears in the thread head 6, can be convenient for change. After the screw head 6 is installed, the centering hole 4 formed in the centering circular plate 3 is aligned to the position right above the hollow positioning pin 7, the lower surface of the screw head 6 is attached to the upper surface of the hollow positioning pin 7, the handle 48 fixedly installed on the upper barrel 1 is held by the hand (the handle 48 can also be used as a part to be held by a daily worker, the handle 48 is held by the hand to move the upper barrel 1, the centering barrel 2 and the like), then the centering barrel 2 is pressed downwards to enable the centering barrel 2 to move downwards together with the centering circular plate 3, the centering hole 4 slides downwards along the outer surface of the hollow positioning pin 7, and finally the lower surface of the centering circular plate 3 is contacted with the upper surface of the positioning part 47.
In the descending process of the centering cylinder 2, the first disc 10 positioned on the central axis of the centering cylinder 2 also moves downwards, in the moving process of the first disc 10, the second cylindrical hole 12 arranged in the center of the first disc 10 slides relative to the surface of the dismounting pipe 5, in the process, the upright post 11 fixedly installed on the first disc 10 also moves downwards, and as the height of the upper cylinder 1 is not changed at the moment, the heights of the third disc 23 and the second disc 16 are not changed, namely, the upright post 11 slides downwards relative to the hollow pipe 14 and compresses the second return spring 21, the second return spring 21 is used for assisting the return of the upright post 11, along with the straight rod 20 which also moves downwards along with the centering cylinder 2, in the downward sliding process of the upright post 11, the spherical boss 13 arranged on the upright post 11 also slides relative to the limiting hole 15 arranged on the hollow pipe 14, the limiting hole 15 and the spherical boss 13 are used for limiting, and meanwhile, the upright post 11 slides downwards for the maximum distance, so that the upright post 11 cannot completely slide out of the hollow pipe 14.
After the lower surface of the centering circular plate 3 is close to the upper surface of the positioning part 47, which represents that the centering circular plate 3 and the centering hole 4 are centered, when a worker grasps the handle 35 by hand to swing up and down, when pulling up the handle 35, the end of the handle 35 connected to the lever 32 moves down due to the presence of the mounting bracket 36, the lever 32 slides along the second rectangular groove 37, and when the lever 32 is connected to the sliding plate 29, the lever 32 moving down pushes the sliding plate 29 to slide the sliding plate 29 down along the second guiding groove 31 of the guiding plate 28, the guiding plate 28 is connected to the third circular plate 23 via the second screw 50, during the downward movement of the sliding plate 29, the first rectangular groove 30 provided on the sliding plate 29 slides relative to the sliding column 34, i.e., the sliding plate 29 pushes the sliding column 34 via the first rectangular groove 30, so that the sliding column 34 carries the sliding block 26 to slide along the limiting rod 27, the sliding direction is to the right (see fig. 8), the limiting rod 27 moves to the right via the first rectangular groove 49, the sliding block 28 pushes the sliding column 34 via the sliding column 34, when the sliding plate 29 rotates, the ratchet 5 is connected to the ratchet 5, and when the ratchet 5 is rotated, the ratchet 5 is finally, the ratchet 5 is mounted on the outer end of the ratchet 5, and the ratchet 5, the ratchet 5 is mounted on the hollow pipe 5, and the ratchet 5, the ratchet 5 is rotated, and the ratchet 5 is finally, the ratchet 5 is removed. It should be noted that when the slide plate 29 is moved upward by the pull rod 32, the first rectangular slot 30 slides leftward by the slide post 34 with the slide block 26, and due to the presence of the third return spring 33, the ratchet 24 presses the pawl 25 to rotate the pawl 25 into the slide block 26, and the third return spring 33 is compressed, and the third return spring 33 assists in returning the pawl 25.
In the process that the dismounting pipe 5 and the thread head 6 move downwards, the limiting rotary block 44 rotatably mounted below the dismounting pipe 5 can contact the inner wall of the hollow positioning pin 7, the limiting rotary block 44 is initially opened towards the direction far away from the central axis of the dismounting pipe 5, because the limiting rotary block 44 can contact the inner wall of the hollow positioning pin 7 in the process of descending, the limiting rotary block 44 can rotate under the action of the inner wall of the hollow positioning pin 7, the rotating direction is close to the central axis of the dismounting pipe 5, meanwhile, the torsion spring 45 can generate elasticity in the process, the torsion spring 45 has the function of resetting the limiting rotary block 44, and meanwhile, the limiting rotary block 44 is prevented from being turned over by too large angle relative to the central axis of the dismounting pipe 5 in a free state; in the normal state, an angle between an end surface of the stopper piece 44 remote from the central axis of the removal pipe 5 and the central axis of the removal pipe 5 is less than 90 ° (see fig. 13).
In the process that the dismounting pipe 5 rotates and moves downwards, the upper barrel 1 fixedly connected with the dismounting pipe 5 also rotates and moves, namely the crank 35 also moves circularly around the central axis of the hollow positioning pin 7, the purpose of doing so is that when a worker operates the crank 35, force is inevitably generated on one side where the crank 35 is located, so that pressure is generated on the hollow positioning pin 7, if the positions of the crank 35 are not alternated, the side where the crank 35 is located can enable one side, close to the crank 35, of the positioning part 47 to be stressed due to the fact that force is always exerted on the side where the positioning part 47 is located, so that the internal structure of the positioning part 47 is affected, the crank 35 rotates along with the upper barrel 1 and the dismounting pipe 5, the stress on the positioning part 47 can be guaranteed to be uniform to the maximum degree, the quality of the positioning part 47 is guaranteed, according to ergonomics, the lifting of the pull rod 32 is controlled by arranging the crank 35 and the mounting frame 36, manual operation can be facilitated to the maximum degree, and the mounting frame 36 can be easily installed on the outer surface of the upper barrel 35 in a swinging mode through welding and the mounting frame 36 can swing mode.
In addition, in the process of rotating the upper barrel 1 and the dismounting pipe 5, the disc three 23 below the upper barrel 1 also rotates, the disc three 23 can be installed on the upper barrel 1 through welding, the rotating disc three 23 can drive the disc two 16 to rotate together, the disc two 16 can be connected with the disc three 23 through the screw three or can be connected through welding, the rotating disc two 16 drives the upright post 11 and the disc one 10 to rotate through the hollow pipe 14, and due to the existence of the bearing 9, even if the disc one 10 can rotate, the centering barrel 2 still keeps a static state at the moment, so that the centering barrel 2 and the hollow positioning pin 7 are kept static and can always play a centering role.
After the crank 35 is continuously swung to enable the screw head 6 to be completely screwed into the hollow positioning pin 7, the crank 35 is released, and then the worker starts to operate the hand wheel 41, specifically, the hand wheel 41 is rotated, since the hand wheel 41 is fixedly connected with the rotating shaft 38, the rotating shaft 38 rotates on the shaft hole 42, the rotating shaft 38 drives the lifting gear 40 fixedly installed on the rotating shaft 38 to rotate, and the lifting gear 40 is meshed with the teeth 22, so that the lifting gear 40 pushes the straight rod 20 to slide upwards along the first guide groove 19 through the teeth 22, the upper end of the straight rod 20 generates an upward force on the lower end face of the third disc 23, and under the action of the upward force, the third disc 23 and the upper barrel 1 move upwards together, and the dismounting pipe 5 moves upwards along with the upper barrel 1, the dismounting pipe 5 can drive the screw head 6 to move upwards together, the screw head 6 is gradually screwed into the hollow positioning pin 7 through the threads on the outer surface, and the upper end of the limiting rotating block 44 is also contacted with the inner surface of the hollow positioning pin 7, so the screw head 6 moving upwards can pull out the hollow positioning pin 7 from the positioning part 47 together, thereby the dismounting of the hollow positioning pin 7 is completed, it should be noted that the two ends of the rotating shaft 38 are both provided with the round holes 39, pins, wires and other parts capable of limiting the sliding of the rotating shaft 38 on the centering barrel 2 can be installed at the positions of the round holes 39, the hand wheel 41 is formed by casting, and can be replaced by light materials, the hand wheel 41 is provided with the cylindrical rod, and the cylindrical rod is more convenient for a worker to grasp. Certainly, in order to save more labor and facilitate force application when the hollow positioning pin 7 is detached, a hollow steel pipe or other hollow materials can be additionally sleeved on the cylindrical rod, and the hand wheel 41 is driven to rotate by the hollow steel pipe and the like, so that the force application of workers is facilitated.
Claims (9)
1. The utility model provides a locating pin dismounting device for aerospace engine, includes a section of thick bamboo (1), its characterized in that: be located and be provided with a centering section of thick bamboo (2) under section of thick bamboo (1), centering section of thick bamboo (2) below with axle center fixed mounting have centering plectane (3), the center of centering plectane (3) is provided with centering hole (4), be provided with on the central axis direction of centering hole (4) and dismantle pipe (5), dismantlement pipe (5) upper end and last section of thick bamboo (1) fixed connection, the lower extreme detachable of dismantling pipe (5) installs screw head (6), the surface of screw head (6) is provided with the screw thread, screw head (6) be used for dismantling hollow locating pin (7) of installing on locating part (47).
2. A positioning pin dismounting device for an aerospace engine according to claim 1, wherein: the centering device is characterized in that a first cylindrical hole (8) is formed above the centering barrel (2), the first cylindrical hole (8) is connected with an outer ring of a bearing (9), an inner ring of the bearing (9) is connected with a first disc (10), two upright posts (11) are fixedly mounted above the first disc (10), a plurality of spherical bosses (13) are arranged on the upright posts (11), the upright posts (11) are in sliding fit with inner walls of hollow tubes (14), the hollow tubes (14) are fixedly mounted on a second disc (16), a plurality of limiting holes (15) are formed in the hollow tubes (14), a first reset spring (18) is arranged between each upright post (11) and each hollow tube (14), the spherical bosses (13) are in sliding fit with the limiting holes (15), the second disc (16) is mounted below a third disc (23), and the third disc (23) is fixedly mounted below the upper barrel (1).
3. A positioning pin dismounting device for an aerospace engine according to claim 2, wherein: the center of the second disk (16) is provided with a third cylindrical hole (17), the center of the first disk (10) is provided with a second cylindrical hole (12), the dismounting pipe (5) penetrates through the second cylindrical hole (12) and the third cylindrical hole (17), the dismounting pipe (5) is in sliding fit with the second cylindrical hole (12), and the central axes of the dismounting pipe (5), the third cylindrical hole (17) and the second cylindrical hole (12) are overlapped.
4. A positioning pin dismounting device for an aerospace engine according to claim 3, wherein: a centering cylinder (2) on symmetrical arrangement have two guide way (19), guide way (19) on slidable mounting have straight-bar (20), straight-bar (20) on be provided with a plurality of teeth (22), straight-bar (20) upper end and the lower extreme sliding fit of disc three (23), straight-bar (20) lower extreme and guide way (19) between be provided with reset spring two (21).
5. The positioning pin dismounting device for the aerospace engine according to claim 4, wherein: two straight-bar (20) on tooth (22) that set up respectively with two lifting gear (40) meshing cooperation, lifting gear (40) fixed mounting on pivot (38), pivot (38) pass two shaft holes (42) that set up on last section of thick bamboo (1) and with shaft hole (42) normal running fit, one of pivot (38) serve fixedly connected with hand wheel (41).
6. The positioning pin dismounting device for the aerospace engine according to claim 5, wherein: dismantle pipe (5) on fixed mounting have ratchet (24), ratchet (24) and the one end meshing cooperation of pawl (25), pawl (25) other end rotate to be installed on sliding block (26), pawl (25) and sliding block (26) between be provided with reset spring three (33), sliding block (26) slidable mounting between two gag lever post (27), gag lever post (27) fixed mounting on deflector (28), deflector (28) be connected with disc three (23).
7. A positioning pin dismounting device for an aerospace engine according to claim 6, wherein: the sliding block (26) on keep away from and be provided with sliding column (34) on the face of pawl (25), sliding column (34) and sliding plate (29) set up the rectangular channel one (30) sliding fit that sets up, sliding plate (29) and guide plate (28) on guide way two (31) sliding fit that set up, sliding plate (29) on fixed mounting have the one end of pull rod (32), pull rod (32) other end pass rectangular channel two (37) on last section of thick bamboo (1) and be connected with crank (35) rotation, crank (35) be connected with mounting bracket (36), the logical groove that sets up on crank (35) and mounting bracket (36) sliding connection, mounting bracket (36) fixed mounting on last section of thick bamboo (1).
8. The positioning pin dismounting device for an aerospace engine according to claim 7, wherein: the below of dismantlement pipe (5) be provided with four rectangular channel three (43), rectangular channel three (43) on the cooperation of rotating have spacing commentaries on classics piece (44), spacing commentaries on classics piece (44) and rectangular channel three (43) between be provided with torsional spring (45), the lower extreme fixed mounting of dismantlement pipe (5) have thread plate (46), thread plate (46) and thread head (6) threaded connection.
9. The use method of the positioning pin dismounting device for the aerospace engine as recited in claim 8, characterized by comprising the steps of:
the first step is as follows: installing the screw head (6) below the dismounting pipe (5);
the second step is that: the centering cylinder (2) is held by hand, a centering hole (4) on a centering circular plate (3) positioned below the centering cylinder (2) is attached to the outer wall of a hollow positioning pin (7), and a thread head (6) is positioned right above the hollow positioning pin (7);
the third step: the dismounting pipe (5) is made to do circular motion, and the threaded head (6) is screwed into the hollow positioning pin (7) through the dismounting pipe (5);
the fourth step: the hand wheel (41) is rotated, the hand wheel (41) drives the rotating shaft (38) and the lifting gear (40) on the rotating shaft (38) to rotate, the straight rod (20) is pushed upwards through the lifting gear (40), so that the upper barrel (1) and the dismounting pipe (5) are pushed upwards through the lifting gear (40), and the hollow positioning pin (7) is pulled out of the positioning part (47).
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| CN202211343192.7A CN115383677B (en) | 2022-10-31 | 2022-10-31 | Positioning pin dismounting device for aerospace engine and using method thereof |
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| CN202211343192.7A CN115383677B (en) | 2022-10-31 | 2022-10-31 | Positioning pin dismounting device for aerospace engine and using method thereof |
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| CN115383677B CN115383677B (en) | 2022-12-27 |
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| CN115383677B (en) | 2022-12-27 |
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