1. A thread disassembling device of a self-locking mechanism is characterized by comprising a large gear part (100), a small gear part (200), a supporting plate (300), a connecting rod (400), a spline head (500) and a thread cover plate (600);

the support plate (300) is fixed at a corresponding position of an outlet of an output shaft of the engine through a bolt; the large gear part (100) and the small gear part (200) are respectively mounted on the support plate (300); the large gear part (100) and the small gear part (200) form a gear pair, and the small gear part (200) drives the large gear part (100) to rotate;

the upper end of the connecting rod (400) is matched with the lower part of the center of the large gear part (100) through a hexagonal cylindrical surface, can rotate along with the rotation of the large gear part (100), and can move up and down along the center of the large gear part (100); the threaded cover plate (600) is pressed on the upper end surface of the connecting rod (400) and is connected with the center of the large gear part (100) through threads; the spline head (500) is arranged at the lower end of the connecting rod (400) through a quick-change connector.

2. The thread disassembling device of a self-locking mechanism according to claim 1, wherein said large gear portion (100) comprises a large gear (110), a first ball bearing (120), a second ball bearing (130), and a retainer ring (140); a gear shaft (111) extends downwards from the center of the large gear (110), and a through hole (112) is formed in the center of the gear shaft (111); the gear shaft (111) is connected with the support plate (300) in a relative rotation mode through the first ball bearing (120) and the second ball bearing (130) which are respectively sleeved on the upper portion and the lower portion of the outer circumference of the gear shaft (111).

3. The thread take-up device of a self-locking mechanism according to claim 2, wherein a retainer ring (140) is disposed between the first ball bearing (120) and the second ball bearing (130); used for fixing the inner rings of the first ball bearing (120) and the second ball bearing (130).

4. The thread disassembling device of a self-locking mechanism according to claim 1, wherein said pinion gear portion (200) comprises a pinion gear (210), a gear shaft (220), a third ball bearing (230), a fourth ball bearing (240), a gear mounting seat (250);

the gear mounting seat (250) is connected with the supporting plate (300) through bolts, and a semi-open chamber for accommodating the small gear (210) is formed in the gear mounting seat, so that the small gear (210) and the large gear (110) are meshed and matched with each other;

the gear shaft (220) penetrates through the center of the pinion (210) and is fixedly connected with the pinion (210); the third ball bearing (230) and the fourth ball bearing (240) are respectively sleeved on the gear shaft (220) and are vertically symmetrical to the position of the pinion (210), and the pinion (210) and the gear shaft (220) are relatively and rotatably connected with the gear mounting seat (250) through the third ball bearing (230) and the fourth ball bearing (240).

5. The thread disassembling device of a self-locking mechanism according to claim 4, wherein said pinion gear portion (200) further comprises a fastening screw (260), an upper bearing pressure plate (270), a lower bearing pressure plate (280);

the upper bearing pressure plate (270) is pressed on the third ball bearing (230), and the upper end of the upper bearing pressure plate is fixed through a baffle structure at the upper end of the gear shaft (220); the lower bearing pressure plate (280) presses on the fourth ball bearing (240) and is fixed through the fastening screw (260).

6. The thread disassembling device of a self-locking mechanism according to claim 5, wherein said pinion (210) and said gear shaft (220) are fixedly connected by a flat key (221).

7. The thread disassembling apparatus of a self-locking mechanism according to claim 1, wherein said supporting plate (300) is provided with a large gear portion bearing cavity (310), and a gear shaft (111) of said large gear portion (100) is installed in said large gear portion bearing cavity (310); the large gear part bearing cavity (310) further comprises a bearing retainer ring (320) and a clamping ring (330).

8. The thread disassembling device of the self-locking mechanism according to claim 1, wherein the upper end of the connecting rod (400) has a stepped structure, and a through hole (112) at the center of the gear shaft (111) matched with the connecting rod is a multi-stage stepped through hole, so that the up-and-down movement limit of the connecting rod (400) can be realized.

9. The thread disassembling apparatus of a self-locking mechanism according to claim 1, wherein the spline head (500) is connected to the connecting rod (400) at one end thereof with a quick coupling structure and at the other end thereof with a spline structure.

10. The thread disassembling device of a self-locking mechanism according to claim 1, wherein the threaded cover plate (600) has threads on the outer circumference of the end contacting with the upper end of the connecting rod (400) and is in fit connection with the hole of the central through hole (112) of the gear shaft (111).

Background

A certain aeroengine repaired to the life needs to be disassembled, the elastic shaft is structurally shown in figure 3, an external spline at the right end of the elastic shaft is meshed with an internal formation key of a front shaft neck of a compressor rotor, an inner hole is connected through a sleeve tooth nut, the sleeve tooth nut is screwed into a threaded hole of the front shaft neck of the compressor rotor, a stop spring seat is installed for preventing the working process of the sleeve tooth nut from loosening, the spline of the stop spring seat is kept meshed with the internal formation key of the sleeve tooth nut all the time through spring jacking, and self-locking is finally achieved.

According to the traditional method, when a set tooth nut in the self-locking mechanism at the front end of the elastic shaft is disassembled, a T-shaped wrench is needed to disassemble the set tooth nut, the acting end of the wrench is an external spline, and the using method of the set tooth nut is as follows:

1. inserting a spanner into a central hole of the elastic shaft, and slightly rotating the spanner to enable the external spline of the action end to be well meshed with the internalization key of the engine;

2. an operator forcibly pushes the T-shaped wrench inwards to compress the spring in the engine, and the pushing force is kept from loosening when the operator senses that the engine is pushed to the bottom by hands;

3. the wrench is rotated by force to generate torque force, so that the sleeve gear nut at the action part of the external spline of the wrench is loosened until the sleeve gear nut is disassembled.

When the threaded connection of the sleeve gear nut is tight in the engine in service life, the spline part bears overlarge instantaneous torque force, a plurality of T-shaped wrenches are continuously broken, the sleeve gear nut cannot be separated, and the sleeve gear nut directly interferes with the subsequent steps of engine decomposition, so that the elastic shaft can be finally removed only by damaging a series of parts such as the sleeve gear nut through a handheld electric drill, the engine is conveniently further decomposed, the processing progress is seriously influenced, and the parts are damaged.

Through the use steps of the traditional T-shaped wrench observed on site, the operators often have a twisting violent force action, and the sleeve tooth nut is unscrewed by instantly increasing the torque force. This is because the operator is required to simultaneously press and twist the T-wrench during manual operation, and cannot constantly and stably provide a sufficient twisting force to prevent force exhaustion. However, torque force is increased instantaneously, violent impact is generated on a spline part of the T-shaped wrench, and instantaneous shear stress borne by the spline is increased and exceeds material strength, so that fracture is caused.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a thread disassembling device of a self-locking mechanism, which can firstly provide thrust to compress a spring and then amplify torsion so as to realize the disassembly of a sleeve gear nut and simultaneously avoid the breakage or damage of parts in the disassembling process.

The technical scheme of the invention is as follows: in order to achieve the above object, a thread disassembling apparatus of a self-locking mechanism is provided, which is characterized in that the apparatus comprises a large gear part 100, a small gear part 200, a support plate 300, a connecting rod 400, a spline head 500 and a thread cover plate 600;

the support plate 300 is fixed at a corresponding position of an outlet of an output shaft of an engine through a bolt and is used as a support of the whole device; the large gear portion 100 and the small gear portion 200 are mounted on the support plate 300, respectively; the large gear part 100 and the small gear part 200 form a gear pair, and the small gear part 200 drives the large gear part 100 to rotate so as to increase the rotation moment;

the upper end of the connecting rod 400 is coupled to the lower part of the center of the large gear part 100 through a hexagonal cylindrical surface, can rotate along with the rotation of the large gear part 100, and can move up and down along the center of the large gear part 100; the threaded cover plate 600 presses the upper end surface of the connecting rod 400 and is connected with the center of the large gear part 100 through threads; the spline head 500 is mounted to the lower end of the connecting rod 400 through a quick-change coupling.

In one possible embodiment, the large gear portion 100 includes a large gear 110, a first ball bearing 120, a second ball bearing 130, a retaining ring 140; a gear shaft 111 extends downwards from the center of the large gear 110, and a through hole 112 is formed in the center of the gear shaft 111; the gear shaft 111 is relatively rotatably connected to the support plate 300 through the first ball bearing 120 and the second ball bearing 130 respectively fitted to the upper and lower portions of the outer circumference of the gear shaft 111.

Further, a retainer ring 140 is disposed between the first ball bearing 120 and the second ball bearing 130; for fixing the inner rings of the first ball bearing 120 and the second ball bearing 130.

In one possible embodiment, the pinion gear part 200 includes a pinion gear 210, a gear shaft 220, a third ball bearing 230, a fourth ball bearing 240, a gear mounting 250;

the gear mounting base 250 is connected to the support plate 300 by bolts, and has a semi-open chamber therein for accommodating the small gear 210, so as to realize the engagement between the small gear 210 and the large gear 110;

the gear shaft 220 penetrates through the center of the pinion 210 and is fixedly connected with the pinion 210; the third ball bearing 230 and the fourth ball bearing 240 are respectively sleeved on the gear shaft 220 at positions which are vertically symmetrical to the pinion 210, and the pinion 210 and the gear shaft 220 are relatively rotatably connected with the gear mounting seat 250 through the third ball bearing 230 and the fourth ball bearing 240.

Further, the pinion gear portion 200 further includes a fastening screw 260, an upper bearing pressure plate 270, and a lower bearing pressure plate 280;

the upper bearing plate 270 presses on the third ball bearing 230, and the upper end of the upper bearing plate is fixed by a baffle structure at the upper end of the gear shaft 220; the lower bearing press plate 280 presses on the fourth ball bearing 240 and is fixed by the fastening screw 260.

Further, the pinion 210 and the gear shaft 220 are fixedly connected by a flat key 221.

In one possible embodiment, the support plate 300 is provided with a large gear part bearing cavity 310, and the gear shaft 111 of the large gear part 100 is mounted in the large gear part bearing cavity 310; the large gear bearing cavity 310 further comprises a bearing retainer 320, a clamping ring 330 and a clamping ring 340.

In one possible embodiment, the upper end of the connecting rod 400 has a stepped structure, and the through hole 112 at the center of the gear shaft 111 matched with the stepped structure is a multi-stage stepped through hole, so that the up-and-down movement limitation of the connecting rod 400 can be realized.

In one possible embodiment, the coupling of the splined head 500 to the linkage 400 has a quick coupling structure at one end and a splined structure at the other end.

Furthermore, steel ball locking formula quick change joint design can be chooseed for use to the quick change joint design.

In one possible embodiment, the threaded cover plate 600 is threaded on the outer circumference of the end contacting the upper end of the connecting rod 400 and is in hole-fit connection with the central through hole 112 of the gear shaft 111.

The invention has the advantages and effects that: the device can provide pressing force to press the engine spring, the large pinion pair and the small pinion pair can amplify torsion, and the spline head processed by high-strength materials can be freely replaced. The characteristics enable an operator not to simultaneously press and turn the wrench during operation, and simplify the operation. The requirement to operator arm power has been reduced after the torsion enlargies, make the operator can continuously stably provide enough big torsion under the condition of relaxing, thereby avoid the improper operation that the operator violently took place the power, reduce the fracture number of times of spline head, reduce the instrument loss, and the design of spline head detachable, be convenient for choose for use the more outstanding material of mechanical properties to process in batches alone and carry out intensive processing, even the working process takes place to damage, also be convenient for change, avoided the connecting rod whole to scrap.

Drawings

FIG. 1 is a schematic view of the structure of the apparatus according to the preferred embodiment of the present invention

FIG. 2 is a detailed view of the structure of the apparatus of the preferred embodiment of the present invention

FIG. 3 is a schematic view of an engine output elastomeric shaft connection

FIG. 4 is a schematic view of the locking structure of the output elastic shaft of the engine

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.

As shown in fig. 1, a thread disassembling device of a self-locking mechanism includes a large gear portion 100, a small gear portion 200, a support plate 300, a connecting rod 400, a spline head 500, and a thread cover plate 600;

the support plate 300 is fixed at a corresponding position of an outlet of an output shaft of an engine through a bolt and is used as a support of the whole device; the large gear portion 100 and the small gear portion 200 are mounted on the support plate 300, respectively; the large gear part 100 and the small gear part 200 form a gear pair, and the small gear part 200 drives the large gear part 100 to rotate so as to increase the rotation moment;

the upper end of the connecting rod 400 is coupled to the lower part of the center of the large gear part 100 through a hexagonal cylindrical surface, can rotate along with the rotation of the large gear part 100, and can move up and down along the center of the large gear part 100; the threaded cover plate 600 presses the upper end surface of the connecting rod 400 and is connected with the center of the large gear part 100 through threads; the spline head 500 is mounted to the lower end of the connecting rod 400 through a quick-change coupling.

In one possible embodiment, as shown in fig. 2, the large gear portion 100 includes a large gear 110, a first ball bearing 120, a second ball bearing 130, a retaining ring 140; a gear shaft 111 extends downwards from the center of the large gear 110, and a through hole 112 is formed in the center of the gear shaft 111; the gear shaft 111 is relatively rotatably connected to the support plate 300 through the first ball bearing 120 and the second ball bearing 130 respectively fitted to the upper and lower portions of the outer circumference of the gear shaft 111.

Further, a retainer ring 140 is disposed between the first ball bearing 120 and the second ball bearing 130; for fixing the inner rings of the first ball bearing 120 and the second ball bearing 130.

In one possible embodiment, the pinion gear part 200 includes a pinion gear 210, a gear shaft 220, a third ball bearing 230, a fourth ball bearing 240, a gear mounting 250;

the gear mounting base 250 is connected to the support plate 300 by bolts, and has a semi-open chamber therein for accommodating the small gear 210, so as to realize the engagement between the small gear 210 and the large gear 110;

the gear shaft 220 penetrates through the center of the pinion 210 and is fixedly connected with the pinion 210; the third ball bearing 230 and the fourth ball bearing 240 are respectively sleeved on the gear shaft 220 at positions which are vertically symmetrical to the pinion 210, and the pinion 210 and the gear shaft 220 are relatively rotatably connected with the gear mounting seat 250 through the third ball bearing 230 and the fourth ball bearing 240.

Further, the pinion gear portion 200 further includes a fastening screw 260, an upper bearing pressure plate 270, and a lower bearing pressure plate 280;

the upper bearing plate 270 presses on the third ball bearing 230, and the upper end of the upper bearing plate is fixed by a baffle structure at the upper end of the gear shaft 220; the lower bearing press plate 280 presses on the fourth ball bearing 240 and is fixed by the fastening screw 260.

Further, the pinion 210 and the gear shaft 220 are fixedly connected by a flat key 221.

In one possible embodiment, the support plate 300 is provided with a large gear part bearing cavity 310, and the gear shaft 111 of the large gear part 100 is mounted in the large gear part bearing cavity 310; the large gear bearing cavity 310 further comprises a bearing retainer 320, a clamping ring 330 and a clamping ring 340.

In one possible embodiment, the upper end of the connecting rod 400 has a stepped structure, and the through hole 112 at the center of the gear shaft 111 matched with the stepped structure is a multi-stage stepped through hole, so that the up-and-down movement limitation of the connecting rod 400 can be realized.

In one possible embodiment, the coupling of the splined head 500 to the linkage 400 has a quick coupling structure at one end and a splined structure at the other end.

Furthermore, steel ball locking formula quick change joint design can be chooseed for use to the quick change joint design.

In one possible embodiment, the threaded cover plate 600 is threaded on the outer circumference of the end contacting the upper end of the connecting rod 400 and is in hole-fit connection with the central through hole 112 of the gear shaft 111.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equally replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application, and are intended to be included within the scope of the present application.