A top tool for disassembly of an aircraft engine gear box assembly

Abstract

The application discloses a top device for disassembling an aero-engine gear box assembly, and belongs to the field of aero-engine maintenance, which comprises a vertical seat, a top rod is arranged in the vertical seat and slides vertically, a top block is fixed to the top surface of the top rod, a cavity is formed in the vertical seat, a push plate is arranged in the cavity, the outer circumferential surface of the push plate is matched with the inner circumferential surface of the cavity, the push plate divides the cavity into an upper cavity and a lower cavity, the bottom end of the top rod is fixed to the top surface of the push plate, resistance oil is filled in the upper cavity and the lower cavity, a communication pipe one is fixed to the outer circumferential surface of the vertical seat, the two ends of the communication pipe one are respectively communicated with the upper cavity and the lower cavity, a one-way valve is arranged on the communication pipe one, the resistance oil in the upper cavity can flow into the lower cavity through the one-way valve, and a driving mechanism for driving the top rod to move vertically is arranged on the vertical seat. The application has the effect of improving the support stability of the top rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aero-engine maintenance, and in particular to a jacking tool for disassembling an aero-engine gear box assembly. BACKGROUND

[0002] When the engine gear box assembly is disassembled, the auxiliary gear box needs to be separated from the high-speed gear box. Due to the tight fit between the auxiliary gear box sleeve end and the high-speed gear box shell, the traditional disassembly process is to vertically place the high-speed and auxiliary gear box assembly on a soft pad, and the high-speed gear box is fixed by the staff from below, and the auxiliary gear box is shaken back and forth by the staff from above by the force of the lifting tool, so as to separate the auxiliary gear box from the high-speed gear box.

[0003] In the related art, a Chinese invention patent with publication number CN107756320B discloses a jacking tool for disassembling an aero-engine gear box assembly, which comprises a first jacking tool body arranged on the constant transmission side of the gear box assembly and a second jacking tool body arranged on the hanging lug side of the gear box assembly. The gear box assembly comprises a high-speed gear box located on the lower side and an auxiliary gear box located on the upper side. The first jacking tool body comprises a first supporting plate, the lower part of the first supporting plate is connected to an adapter seat between the high-speed gear box and the auxiliary gear box through a first support column, a first jack rod is threadedly connected to the upper part of the first supporting plate, and the upper part of the first jack rod is connected to a first jacking plate jacked against the lower side of the auxiliary gear box. The second jacking tool body comprises a second supporting plate, the lower part of the second supporting plate is connected to the adapter seat between the high-speed gear box and the auxiliary gear box through a second support column, a second jack rod is threadedly connected to the upper part of the second supporting plate, and the upper part of the second jack rod is connected to a second jacking plate jacked against the lower side of the auxiliary gear box.

[0004] According to the above related art, by rotating the first jack rod and the second jack rod, the first jack rod and the second jack rod drive the first jacking plate and the second jacking plate to move upward, so that the first jacking plate and the second jacking plate jack the auxiliary gear box upward, thereby separating the auxiliary gear box from the high-speed gear box. Due to the heavy weight of the auxiliary gear box, the jack rod bears the gravity of the auxiliary gear box downward, and the jack rod and the supporting plate are connected through threads, thereby reducing the stability of the jack rod. SUMMARY

[0005] In order to improve the problem that due to the heavy weight of the auxiliary gear box, the jack rod bears the gravity of the auxiliary gear box downward, the thread friction between the jack rod and the supporting plate is large, and the jack rod is easily worn during use, thereby reducing the service life of the jack rod, the present application provides a jacking tool for disassembling an aero-engine gear box assembly.

[0006] The jacking tool for disassembling an aero-engine gear box assembly provided by the present application adopts the following technical solution:

[0007] The utility model provides a kind of top for dismantling aero-engine gear box assembly, including pedestal, top rod is arranged in the pedestal along vertical sliding, the top surface of top rod is fixed with top block, cavity is opened in the pedestal, push plate is arranged in the cavity, the outer circumferential surface of push plate is consistent with the inner circumferential surface of the cavity, the push plate separates the cavity into upper cavity and lower cavity, the bottom end of top rod is fixed to the top surface of push plate, resistance oil is filled in the upper cavity and the lower cavity, the outer circumferential surface of pedestal is fixed with communication pipe one, the upper cavity and the lower cavity are connected with the two ends of communication pipe one respectively, one-way valve is arranged on communication pipe one, the resistance oil in the upper cavity can flow into the lower cavity by one-way valve, drive mechanism is arranged on the pedestal for driving top rod moves vertically.

[0008] By adopting the above technical scheme, when the auxiliary gear box needs to be removed from the high-speed gear box, the aero-engine gear box assembly is placed vertically and fixed by the lifting tool, the auxiliary gear box faces upward, the pedestal is placed on the top surface of the high-speed gear box, the top rod is driven to move upward by the drive mechanism, the top surface of the top block abuts against the bottom surface of the auxiliary gear box, when the top rod moves upward, the push plate is also driven to move upward, the push plate extrudes the resistance oil in the upper cavity, and the resistance oil in the upper cavity flows into the lower cavity through the communication pipe one, because the one-way valve is arranged on the communication pipe one, the resistance oil in the lower cavity cannot flow back to the upper cavity through the one-way valve, when the top rod moves upward to lift the auxiliary gear box upward, the push plate is supported by the resistance oil in the lower cavity, so that the push plate supports the top rod, thereby improving the support stability of the top rod.

[0009] Preferably, the outer circumferential surface of the pedestal is fixed with communication pipe two, the upper cavity and the lower cavity are connected with the two ends of communication pipe two respectively, and valves are arranged on the communication pipe one and the communication pipe two.

[0010] By adopting the above technical scheme, when the top rod needs to move downward, the valve on the communication pipe one is closed, the valve on the communication pipe two is opened, the drive mechanism drives the top rod to move downward, the top rod drives the push plate to move downward, and the resistance oil in the lower cavity flows into the upper cavity through the communication pipe two, thereby facilitating the downward movement of the top rod.

[0011] Preferably, a circular groove is opened on the top surface of the pedestal, the drive mechanism includes a rotating sleeve rotatingly arranged in the circular groove, the top end of the top rod passes through the rotating sleeve, the top rod is threadedly connected with the rotating sleeve, and a drive assembly for driving the rotating sleeve to rotate is arranged on the pedestal.

[0012] When it is needed to move the ejector rod upward to lift the auxiliary gear box upward and detach it from the high-speed gear box, the rotating sleeve is driven to rotate by the driving assembly, the ejector rod is driven to move upward by the rotating sleeve, the ejector rod lifts the auxiliary gear box upward, and the auxiliary gear box is detached from the high-speed gear box.

[0013] Preferably, an annular groove is formed in the inner circumferential surface of the circular groove, the driving assembly comprises a worm wheel arranged on the rotating sleeve and located in the annular groove, the outer circumferential surface of the vertical seat is fixed with a connecting block, an installation cavity is formed in the connecting block, the installation cavity is in communication with the annular groove, a worm is rotatably arranged in the installation cavity, the worm is engaged with the worm wheel, one end of the worm passes through the side surface of the connecting block, and a rotating handle is fixed to the end of the worm away from the connecting block.

[0014] When it is needed to move the ejector rod upward to lift the auxiliary gear box upward and detach it from the high-speed gear box, the rotating handle is rotated, the worm is driven to rotate by the rotating handle, the worm wheel is driven to rotate by the worm, the rotating sleeve is driven to rotate by the worm wheel, the ejector rod is driven to move upward by the rotating sleeve, and the ejector rod lifts the auxiliary gear box upward and detaches it.

[0015] Preferably, a ratchet wheel is arranged on the worm, a rotating shaft is fixed to the inner side wall of the installation cavity, a pawl is rotatably arranged on the rotating shaft, one end of the pawl away from the rotating shaft is inserted into the tooth groove of the ratchet wheel, and a driving member is arranged on the rotating shaft and used for driving the pawl to rotate towards the ratchet wheel.

[0016] When the rotating handle is rotated, the worm is driven to rotate by the rotating handle, and the ratchet wheel is also driven to rotate by the worm; when the rotating handle is stopped, the pawl is driven to rotate towards the ratchet wheel by the driving member, and the pawl is inserted into the tooth groove of the ratchet wheel, so that the possibility of reverse rotation of the worm is reduced.

[0017] Preferably, the driving member comprises a torsion spring sleeved on the rotating shaft, one end of the torsion spring is fixedly connected with the side surface of the pawl, and the other end of the torsion spring is fixedly connected with the inner side surface of the installation cavity.

[0018] When the rotating handle is stopped, the pawl is driven to rotate towards the ratchet wheel by the elastic force of the torsion spring, and the pawl is inserted into the tooth groove of the ratchet wheel.

[0019] Preferably, a through groove is formed in the inner side surface of the installation cavity away from the worm wheel, a push rod is fixed to the outer circumferential surface of the pawl, and one end of the push rod away from the pawl passes through the through groove.

[0020] When the ejector rod needs to be lowered, the ejector rod is driven to move downward by rotating the rotating sleeve, the worm, the worm wheel, the handle and the ejector rod.

[0021] Preferably, the outer circumferential surface of the ejector rod is sleeved with a support plate, both end surfaces of the support plate are provided with sliding grooves, the sliding grooves are slidably provided with connecting plates, the top surface of the connecting plate is fixedly provided with a baffle, the side surface of the connecting plate away from the baffle is fixedly provided with a plurality of tension springs, and one end of the tension spring away from the connecting plate is fixed to the inner side surface of the sliding groove.

[0022] By adopting the above technical scheme, when the auxiliary gear box is lifted up and removed by the ejector rod, the gear auxiliary box is located between the two baffles by moving the baffles away from the support plate, the connecting plate is loosened, and the two baffles clamp the gear auxiliary box by moving the connecting plate toward the center axis of the support plate under the elastic force of the tension spring, thereby reducing the possibility that the gear auxiliary box slides off the ejector rod when the ejector rod lifts up the auxiliary gear box.

[0023] Preferably, the opposite inner side surfaces of the sliding groove are provided with limiting grooves, and both side surfaces of the connecting plate are fixedly provided with limiting blocks slidably arranged in the limiting grooves.

[0024] By adopting the above technical scheme, when the connecting plate moves in the sliding groove, the connecting plate drives the limiting block to move in the limiting groove, thereby reducing the possibility that the connecting plate is separated from the sliding groove.

[0025] Preferably, the inner bottom surface of the sliding groove is provided with a through hole, a bolt is inserted in the through hole, the bolt is threadedly connected with the inner wall of the through hole, and the top end of the bolt can abut against the bottom surface of the connecting plate.

[0026] By adopting the above technical scheme, when the two baffles clamp the auxiliary gear box, the bolt is rotated to move upward, the top end of the bolt abuts against the bottom surface of the connecting plate, thereby fixing the connecting plate in the sliding groove, and reducing the possibility that the connecting plate moves in the sliding groove.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. When the auxiliary gearbox needs to be removed from the high-speed gearbox, the aero-engine gearbox assembly is placed vertically and fixed by the lifting tool, and the auxiliary gearbox is upward, the stand is placed on the top surface of the high-speed gearbox, the top rod is driven to move upward by the driving mechanism, and the top surface of the top block abuts against the bottom surface of the auxiliary gearbox, when the top rod moves upward, the push plate also moves upward, the push plate extrudes the resistance oil in the upper cavity, and the resistance oil in the upper cavity flows into the lower cavity through the communication pipe one, because the one-way valve is arranged on the communication pipe one, the resistance oil in the lower cavity cannot flow back to the upper cavity through the one-way valve, when the top rod moves upward to lift the auxiliary gearbox, the push plate is supported by the resistance oil in the lower cavity, the push plate supports the top rod, thereby improving the support stability of the top rod;

[0029] 2. When the top rod needs to move upward to lift the auxiliary gearbox and remove it from the high-speed gearbox, the handle is rotated, the handle drives the worm to rotate, the worm drives the worm wheel to rotate, and the worm wheel drives the rotating sleeve to rotate, thereby driving the top rod to move upward, and the top rod lifts the auxiliary gearbox and removes it;

[0030] 3. When the auxiliary gearbox is lifted and removed by the top rod, the baffle is moved away from the support plate, the gear auxiliary box is located between the two baffles, the connecting plate is loosened, and the connecting plate moves towards the center axis of the support plate under the elastic force of the tension spring, so that the two baffles clamp the gear auxiliary box, thereby reducing the possibility of the auxiliary gearbox sliding off the top rod when the top rod lifts the auxiliary gearbox upward. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the overall structure schematic diagram of the top tool for removing the aero-engine gearbox assembly.

[0032] Figure 2 It is a sectional view of the stand in the embodiment of the application.

[0033] Figure 3 It is Figure 2 the enlarged schematic view of A in

[0034] Figure 4 It is a sectional view of the support plate in the embodiment of the application.

[0035] Figure 5 It is a structure schematic view of the support plate in the embodiment of the application.

[0036] Figure 6 It is a sectional view of the connecting block in the embodiment of the application.

[0037] Figure 7 It is Figure 6 the enlarged schematic view of B in

[0038] Label: 1, pedestal; 11, ejector rod; 12, sliding block; 13, sliding groove; 14, ejector block; 15, round hole; 16, round groove; 2, support plate; 21, sliding groove; 22, connecting plate; 23, tension spring; 24, baffle; 25, limiting block; 26, limiting groove; 27, through hole; 28, bolt; 3, driving mechanism; 31, rotating sleeve; 32, annular groove; 33, worm gear; 34, connecting block; 35, mounting cavity; 36, worm; 37, handle; 4, ratchet; 41, pawl; 42, rotating shaft; 43, torsional spring; 44, lever; 45, through groove; 5, cavity; 51, push plate; 52, upper cavity; 53, lower cavity; 54, resistance oil; 55, communication pipe one; 56, one-way valve; 57, communication pipe two; 58, valve. DETAILED DESCRIPTION

[0039] The following will be described in detail with reference to the accompanying drawings Figures 1-7 The application is further described in detail.

[0040] The embodiment of the application discloses an ejector for disassembling an aero-engine gear box assembly.

[0041] Referring to Figure 1 and Figure 2 An ejector for disassembling an aero-engine gear box assembly comprises a pedestal 1, the top surface of the pedestal 1 is provided with a round hole 15, an ejector rod 11 is inserted in the round hole 15, an ejector block 14 is fixed to the top end of the ejector rod 11, the ejector rod 11 is slidably connected with the pedestal 1 along the vertical direction through the round hole 15, and a driving mechanism 3 for driving the ejector rod 11 to move along the vertical direction is arranged on the pedestal 1.

[0042] Referring to Figure 2 and Figure 3 The outer circumferential surface of the ejector rod 11 is provided with two sliding grooves 13, and the two sliding grooves 13 are symmetrically arranged along the axis of the ejector rod 11. Two sliding blocks 12 are fixed in the round hole 15, and the two sliding blocks 12 are respectively inserted in the two sliding grooves 13, and the sliding block 12 is slidably connected with the pedestal 1 along the vertical direction through the sliding groove 13.

[0043] Referring to Figure 2 and Figure 4The outer circumferential surface of the top rod 11 is sleeved with a support plate 2, and the support plate 2 is located between the top block 14 and the stand 1. Both end faces of the support plate 2 are provided with sliding grooves 21, and the sliding grooves 21 are slidably provided with connecting plates 22. The connecting plates 22 are slidably connected with the support plate 2 along the length direction of the support plate 2 through the sliding grooves 21. Both side faces of the connecting plate 22 are fixedly provided with limiting blocks 25, and the opposite inner side faces of the sliding groove 21 are provided with limiting grooves 26, and the limiting blocks 25 are slidably arranged in the limiting grooves 26. The top face of the connecting plate 22 is fixedly provided with a baffle 24, and the mutually faraway side faces of the two baffles 24 are coplanar with the mutually faraway side faces of the two connecting plates 22. The side face of the connecting plate 22 far away from the baffle 24 is fixedly provided with a plurality of tension springs 23, and the plurality of tension springs 23 are arranged at equal intervals along the width direction of the connecting plate 22. One end of the tension spring 23 far away from the connecting plate 22 is fixed to the inner side face of the sliding groove 21 far away from the baffle 24.

[0044] With reference to Figure 2 , Figure 4 and Figure 5 , both sides of the bottom face of the support plate 2 are provided with through holes 27, and the two through holes 27 are respectively communicated with the two sliding grooves 21. The through hole 27 is inserted with a bolt 28, the bolt 28 is threadedly connected with the inner wall of the through hole 27, and the top end of the bolt 28 can abut against the bottom face of the support plate 2.

[0045] When it is needed to dismount the auxiliary gear box from the high-speed gear box, the aero-engine gear box assembly is vertically placed and fixed by using a lifting tool, and the auxiliary gear box is placed upward. The stand 1 is placed on the top face of the high-speed gear box, the top rod 11 is driven to move upward by the driving mechanism 3, and the top face of the top block 14 abuts against the bottom face of the auxiliary gear box. The two baffles 24 are pulled in the direction away from each other, so that the auxiliary gear box is located between the two baffles 24, and then the baffle 24 is loosened. The connecting plate 22 moves in the sliding groove 21 under the elastic force of the tension spring 23, so that the mutually close side faces of the two baffles 24 abut against the outer side face of the auxiliary gear box. Then the bolt 28 is rotated, so that the bolt 28 moves upward, the top end of the bolt 28 abuts against the bottom end of the connecting plate 22, so as to fix the connecting plate 22 in the sliding groove 21, so that the two baffles 24 clamp the auxiliary gear box, thereby reducing the possibility that the auxiliary gear box slides off from the top block 14 when the auxiliary gear box is lifted upward by the top rod 11.

[0046] With reference to Figure 6The top surface of the pedestal 1 is provided with a circular groove 16, and the central axis of the circular groove 16 is in line with the central axis of the circular hole 15. The driving mechanism 3 comprises a rotating sleeve 31 rotatingly arranged in the circular groove 16, and the top end of the jacking rod 11 penetrates through the rotating sleeve 31, and the jacking rod 11 is threadedly connected with the rotating sleeve 31. The inner side surface of the circular groove 16 is provided with an annular groove 32, the outer peripheral surface of the rotating sleeve 31 is sleeved with a worm wheel 33, and the worm wheel 33 is located in the annular groove 32. The outer peripheral surface of the pedestal 1 is fixedly provided with a connecting block 34, the connecting block 34 is internally provided with a mounting cavity 35, the mounting cavity 35 is in communication with the annular groove 32, and the mounting cavity 35 is rotatably provided with a worm 36, and the worm 36 is engaged with the worm wheel 33. One end of the worm 36 penetrates through the end surface of the connecting block 34, and the end of the worm 36 away from the connecting block 34 is fixedly provided with a rotating handle 37.

[0047] When it is needed to detach the auxiliary gear box from the high-speed gear box, the rotating handle 37 is rotated to drive the worm 36 to rotate, the worm 36 drives the worm wheel 33 to rotate, the worm wheel 33 drives the rotating sleeve 31 to rotate, and the rotating sleeve 31 drives the jacking rod 11 to move upward, so that the jacking rod 11 drives the top block 14 to move upward, and the top block 14 lifts the auxiliary gear box upward to be detached from the high-speed gear box.

[0048] Referring to Figure 6 and Figure 7 , the outer peripheral surface of the worm wheel 33 is sleeved with a ratchet wheel 4, the inner side surface of the mounting cavity 35 is fixedly provided with a rotating shaft 42, the rotating shaft 42 is sleeved with a ratchet pawl 41, the ratchet pawl 41 is rotatably connected with the rotating shaft 42, and the end of the ratchet pawl 41 away from the rotating shaft 42 is inserted into the tooth groove of the ratchet wheel 4. The outer peripheral surface of the rotating shaft 42 is sleeved with a torsion spring 43, one end of the torsion spring 43 is fixedly connected with the side surface of the ratchet pawl 41, and the other end of the torsion spring 43 is fixedly connected with the inner side surface of the mounting cavity 35. The outer peripheral surface of the ratchet pawl 41 is fixedly provided with a push rod 44, the push rod 44 is located on the side of the ratchet pawl 41 away from the ratchet wheel 4, the inner side surface of the mounting cavity 35 away from the worm wheel 33 is provided with a through groove 45, and the end of the push rod 44 away from the ratchet pawl 41 penetrates through the through groove 45.

[0049] When the rotating handle 37 is rotated to drive the worm 36 to rotate, the worm 36 drives the worm wheel 33 to rotate, the worm wheel 33 drives the jacking rod 11 to move upward, and the worm 36 also drives the ratchet wheel 4 to rotate at the same time, when the rotating handle 37 is stopped, the ratchet pawl 41 is rotated toward the ratchet wheel 4 under the elastic force of the torsion spring 43, the end of the ratchet pawl 41 away from the rotating shaft 42 is inserted into the tooth groove of the ratchet wheel 4, so as to reduce the possibility of reverse rotation of the worm 36. When it is needed to move the jacking rod 11 downward, the push rod 44 is pushed downward to drive the ratchet pawl 41 to rotate, the ratchet pawl 41 is separated from the tooth groove of the ratchet wheel 4, then the rotating handle 37 is reversely rotated to drive the worm 36 to reversely rotate, the worm 36 drives the worm wheel 33 to reversely rotate, the worm wheel 33 drives the rotating sleeve 31 to reversely rotate, so as to drive the jacking rod 11 to move downward.

[0050] With reference to Figure 2 The cavity 5 is communicated with the circular hole 15, and the push plate 51 is vertically slidably arranged in the cavity 5. The outer circumferential surface of the push plate 51 is fitted with the inner circumferential surface of the cavity 5, and the bottom end of the top rod 11 is fixedly connected with the top surface of the push plate 51. The push plate 51 divides the cavity 5 into an upper cavity 52 and a lower cavity 53, and the upper cavity 52 and the lower cavity 53 are filled with resistance oil 54. The outer circumferential surface of the pedestal 1 is fixedly connected with a communication pipe one 55 and a communication pipe two 57, and the two ends of the communication pipe one 55 and the communication pipe two 57 are respectively communicated with the upper cavity 52 and the lower cavity 53. The outer circumferential surface of the communication pipe one 55 is fixedly connected with a one-way valve 56, the resistance oil 54 in the upper cavity 52 can flow into the lower cavity 53 through the one-way valve 56, and the outer circumferential surfaces of the communication pipe one 55 and the communication pipe two 57 are fixedly connected with valves 58.

[0051] When the top rod 11 moves upward to lift the auxiliary gear box, the valve 58 on the communication pipe one 55 is opened, the valve 58 on the communication pipe two 57 is closed, and the top rod 11 moves upward while driving the push plate 51 to move upward. When the push plate 51 moves upward, the resistance oil 54 in the upper cavity 52 flows into the lower cavity 53 through the one-way valve 56 on the communication pipe one 55, and the resistance oil 54 in the lower cavity 53 cannot flow into the upper cavity 52 through the one-way valve 56 on the communication pipe one 55 due to the closed valve 58 on the communication pipe two 57, so that the resistance oil 54 in the lower cavity 53 supports the push plate 51, and the push plate 51 supports the top rod 11, thereby improving the stability of the top rod 11 when lifting the auxiliary gear box upward. When the top rod 11 moves downward, the valve 58 on the communication pipe one 55 is closed, and the valve 58 on the communication pipe two 57 is opened. When the top rod 11 moves downward, the top rod 11 drives the push plate 51 to move downward, so that the resistance oil 54 in the lower cavity 53 flows into the upper cavity 52 through the communication pipe two 57, thereby facilitating the downward movement of the top rod 11.

[0052] The implementation principle of the jacking tool for disassembling the aero-engine gear box assembly is as follows: when the auxiliary gear box needs to be disassembled from the high-speed gear box, the aero-engine gear box assembly is vertically placed and fixed by the lifting tool, the auxiliary gear box is placed upward, the jacking tool is placed between the auxiliary gear box and the high-speed gear box, the bottom surface of the stand 1 is placed on the top surface of the high-speed gear box, the rotating handle 37 is rotated to drive the worm 36 to rotate, the worm 36 drives the worm wheel 33 to rotate, the worm wheel 33 drives the rotating sleeve 31 to rotate, the rotating sleeve 31 drives the jacking rod 11 to move upward, the jacking rod 11 drives the jacking block 14 to move upward, and the top surface of the jacking block 14 abuts against the bottom surface of the auxiliary gear box. When the jacking block 14 moves to the lower side of the auxiliary gear box, the two baffles 24 are pulled away from each other, the jacking rod 11 continues to move upward, the top surface of the jacking block 14 abuts against the bottom surface of the auxiliary gear box, and the auxiliary gear box is located between the two baffles 24. At this time, the baffles 24 are loosened, the connecting plate 22 moves towards the center axis of the support plate 2 under the elastic force of the tension spring 23, the side surfaces of the two baffles 24 abut against the outer side surfaces of the auxiliary gear box, the top surface of the jacking block 14 abuts against the bottom surface of the auxiliary gear box, then the bolt 28 is rotated to move upward, the top end of the bolt 28 abuts against the bottom surface of the connecting plate 22, so that the connecting plate 22 is fixed in the sliding groove 21, and the two baffles 24 clamp the auxiliary gear box, thereby reducing the possibility that the auxiliary gear box slides off the top surface of the jacking block 14 when the jacking rod 11 lifts the auxiliary gear box upward. When the jacking rod 11 moves upward, the valve 58 on the communication pipe one 55 is opened, and the valve 58 on the communication pipe two 57 is closed. When the jacking rod 11 moves upward, the push plate 51 also moves upward, the push plate 51 extrudes the resistance oil 54 in the upper cavity 52, the resistance oil 54 in the upper cavity 52 flows into the lower cavity 53 through the one-way valve 56 on the communication pipe one 55, the resistance oil 54 in the lower cavity 53 supports the push plate 51, and then the push plate 51 supports the jacking rod 11, so that the support stability of the jacking rod 11 is improved.

[0053] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent changes made according to the structure, shape and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A top tool for disassembly of an aircraft engine gear box assembly, characterized by: The utility model provides stand (1) inside vertical slidingly arranged top rod (11), the top surface of top rod (11) is fixed with top block (14), the inside of stand (1) is provided with cavity (5), the outside circumference of push -board (51) is consistent with the inside circumference of cavity (5), push -board (51) divides the cavity (5) into upper cavity (52) and lower cavity (53), the bottom end of top rod (11) is fixed on the top surface of push -board (51), upper cavity (52) and lower cavity (53) are filled with resistance oil (54) all, the outside circumference of stand (1) is fixed with the communication pipe one (55), the both ends of communication pipe one (55) are linked with upper cavity (52) and lower cavity (53) respectively, communication pipe one (55) is provided with check valve (56), the resistance oil (54) in upper cavity (52) can flow into lower cavity (53) through check valve (56), stand (1) is provided with drive mechanism (3) for driving top rod (11) vertical movement, the outside circumference of stand (1) is fixed with the communication pipe two (57), the both ends of communication pipe two (57) are linked with upper cavity (52) and lower cavity (53) respectively, communication pipe one (55) and communication pipe two (57) are all provided with valve (58), the top surface of stand (1) is provided with round groove (16), drive mechanism (3) includes rotation sleeve (31) rotationally arranged in round groove (16), the top end of top rod (11) passes through rotation sleeve (31), top rod (11) is connected with rotation sleeve (31) threadedly, stand (1) is provided with drive assembly for driving rotation sleeve (31) rotation, the inside circumference of round groove (16) is provided with annular groove (32), drive assembly includes worm wheel (33) arranged on rotation sleeve (31), worm wheel (33) is located in annular groove (32), the outside circumference of stand (1) is fixed with connecting block (34), the installation cavity (35) is communicated with annular groove (32) in connecting block (34), the installation cavity (35) is rotatably installed with worm (36), worm (36) is engaged with worm wheel (33), one end of worm (36) passes through the lateral surface of connecting block (34), the end of worm (36) away from connecting block (34) is fixed with handle (37).

2. A top tool for disassembly of an aircraft engine gear box assembly according to claim 1, characterized in that: Worm (36) is provided with ratchet wheel (4), the inside wall of installation cavity (35) is fixed with rotating shaft (42), ratchet wheel (4) is inserted in the toothing groove of ratchet wheel (4) in the end away from rotating shaft (42) of ratchet pawl (41) rotationally arranged on rotating shaft (42), and the driving part for driving ratchet pawl (41) is arranged on rotating shaft (42) and rotates towards the direction close to ratchet wheel (4).

3. A top tool for disassembly of an aircraft engine gear box assembly according to claim 2, wherein: The driving member comprises a torsion spring (43) sleeved on the rotating shaft (42), one end of the torsion spring (43) is fixedly connected with the side surface of the ratchet (41), and the other end of the torsion spring (43) is fixedly connected with the inner side surface of the mounting cavity (35).

4. A top tool for disassembly of an aircraft engine gear box assembly according to claim 3, wherein: The inner side surface of the mounting cavity (35) away from the worm wheel (33) is provided with a through groove (45), the outer peripheral surface of the ratchet (41) is fixedly provided with a push rod (44), and one end of the push rod (44) away from the ratchet (41) penetrates through the through groove (45).

5. A top tool for disassembly of an aircraft engine gear box assembly according to claim 1, wherein: The outer peripheral surface of the top rod (11) is fixedly sleeved with a support plate (2), both end surfaces of the support plate (2) are provided with sliding grooves (21), the sliding grooves (21) are slidably provided with connecting plates (22), the top surface of the connecting plate (22) is fixedly provided with a baffle (24), the side surface of the connecting plate (22) away from the baffle (24) is fixedly provided with a plurality of tension springs (23), and one end of the tension spring (23) away from the connecting plate (22) is fixed to the inner side surface of the sliding groove (21).

6. A top tool for disassembly of an aircraft engine gear box assembly according to claim 5, wherein: The opposite inner side surfaces of the sliding groove (21) are provided with limiting grooves (26), and the two side surfaces of the connecting plate (22) are fixedly provided with limiting blocks (25) which are slidably arranged in the limiting grooves (26).

7. A top tool for disassembly of an aircraft engine gear box assembly according to claim 5, wherein: The inner bottom surface of the sliding groove (21) is provided with a through hole (27), a bolt (28) is inserted in the through hole (27), the bolt (28) is threadedly connected with the inner wall of the through hole (27), and the top end of the bolt (28) can abut against the bottom surface of the connecting plate (22).

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