Automatic tightening device for engine rotor connecting nut

Abstract

An automatic tightening device for an engine rotor connecting nut comprises a lifting mechanism, a positioning indexing mechanism, a torque input mechanism and a supporting shell, the lifting mechanism is composed of a lifting bolt, a guide column table, an air cylinder, a guide column, a linear bearing I, a lifting table and a top supporting table, and the positioning indexing mechanism is composed of an indexing table and a positioning connecting table. The torque input mechanism is composed of a power input mechanism, a power transmission switching mechanism and a folding tightening mechanism, and the supporting shell is composed of a connecting table, a shell I, a connecting frame I, a shell II, a connecting frame II, a shell III, a connecting frame III and a chassis. The problem that an existing aero-engine rotor connecting nut is difficult to assemble in a narrow space is solved.

Description

Technical field:

[0001] The invention relates to an automatic tightening device for an engine rotor connecting nut, belonging to the technical field of aeroengine assembly. Background technology:

[0002] The engine rotor is a very important power component of the aircraft engine. The assembly quality of the rotor connecting nut directly affects the overall performance of the engine. During the assembly process of the rotor connecting nut, the narrow entrance inside the engine and the deep position of the nut make the assembly difficult. At present, the assembly of the rotor connecting nut of most models of aircraft engines can only be achieved by manual mechanical tooling or devices with a low degree of automation. Therefore, it is of great significance to study an automatic nut tightening device with high automation and high control accuracy to achieve high-efficiency and high-precision automatic assembly of engine nuts. Summary of the invention:

[0003] The objects of the present invention are:

[0004] An automatic tightening device for an engine rotor connecting nut is proposed to solve the problem that the existing aircraft engine rotor connecting nuts are difficult to assemble in a narrow space.

[0005] In order to achieve the purpose of the present invention, the following technical solutions are proposed:

[0006] The present invention comprises: a lifting mechanism, a positioning and indexing mechanism, a torque input mechanism and a supporting shell. The lifting mechanism is composed of a lifting eye screw, a guide column platform, a cylinder, a guide column, a linear bearing I, a lifting platform and a top support platform. The positioning and indexing mechanism is composed of a indexing platform and a positioning and connecting platform. The torque input mechanism is composed of a power input mechanism, a power transmission switching mechanism and a folding tightening mechanism. The power input mechanism is composed of a linear sliding module, a tightening gun, a transfer slider and a tightening gun fastening frame. The power transmission switching mechanism is composed of a linear bearing II, a linear bearing III, a main transmission shaft, a main shaft gear, a center gear, a side expansion gear I, a side bearing I, a center bearing, a side bearing II and a side expansion gear II. The folding tightening mechanism is composed of an elastic retaining ring, a side shaft upper end bearing, a torque transmission The side shaft, side shaft gear, bevel gear I, bevel gear II, bevel gear shaft, rotating pin, worm gear transmission shaft, tightening arm forearm, tightening sleeve, limiting column, side shaft lower end bearing, tightening arm rear arm, swing support frame, cylinder swing sleeve, micro cylinder, rotating shaft, retractable joint, retractable bending rod and retractable fixed block are composed, and the supporting shell is composed of a connecting platform, shell I, connecting frame I, shell II, connecting frame II, shell III, connecting frame III and chassis, and is characterized in that: in the lifting mechanism, the eye screw is fixed on the guide column platform, the guide column platform and the top support platform are fixed on the guide column, the cylinder and the linear bearing I are fixed on the lifting platform, in the positioning and indexing mechanism, the positioning connecting platform is fixed on the indexing platform, in the power input mechanism, the transfer slider is fixed on the linear sliding module On the slide table of the group, the tightening gun fastening frame is fixed on the transfer slider, the tightening gun is fixed on the tightening gun fastening frame, in the power transmission switching mechanism, the main transmission shaft is arranged on the inner rings of the linear bearing II and the linear bearing III, the main shaft gear is fixed on the main transmission shaft, the center gear is arranged on the inner ring of the center bearing, the side expansion gear I is arranged on the inner ring of the side bearing I, the side expansion gear II is arranged on the inner ring of the side bearing II, in the folding tightening mechanism, the torque transmission side shaft is arranged on the inner rings of the side shaft upper end bearing and the side shaft lower end bearing, the elastic retaining ring is fixed on the torque transmission side shaft, the side shaft gear is fixed on the torque transmission side shaft, the bevel gear I is fixed on the torque transmission side shaft, the rotating shaft is arranged on the rear arm of the tightening arm, and the forearm of the tightening arm is arranged through the rotating shaft On the rear arm of the tightening arm, the worm drive shaft is arranged on the front arm of the tightening arm, the bevel gear shaft and the worm drive shaft are connected by a rotating pin, the bevel gear II is fixed on the bevel gear shaft, the swing support frame is fixed on the rear arm of the tightening arm, the cylinder swing sleeve is arranged on the swing support frame, the micro cylinder is fixed on the cylinder swing sleeve, the retractable joint is fixed on the micro cylinder, the retractable bent rod is arranged on the retractable joint and fixed with the retractable fixed block, the retractable fixed block is fixed on the front arm of the tightening arm, the tightening sleeve is arranged on the front arm of the tightening arm, in the supporting shell, the connecting platform is fixed on the shell I, the shell I is fixed on the connecting frame I, the connecting frame I is fixed on the shell II, the shell II is fixed on the connecting frame II, the connecting frame II is fixed on the shell III, and the shell III is fixed on the connecting frame III.The connecting frame III is fixed on the chassis, the main transmission shaft is arranged on the output head of the tightening gun, the power transmission switching mechanism and the folding tightening mechanism are connected through the supporting shell, the outer ring of the side bearing I is fixed on the groove of the chassis, the outer ring of the center bearing is fixed on the groove of the chassis, the outer ring of the side bearing II is fixed on the groove of the chassis, the limit column is fixed on the rear arm of the tightening arm, the rear arm of the tightening arm is fixed on the side expansion gear I through the gear groove, the linear bearing I is fixed on the connecting frame I, the linear bearing II is fixed on the connecting frame II, the outer ring of the upper end bearing of the side shaft is fixed on the connecting frame II, the outer ring of the lower end bearing of the side shaft is fixed on the rear arm of the tightening arm, the positioning connecting platform is arranged at the engine entrance, the top support platform is fixed on the indexing platform, the linear sliding module and the connecting platform are fixed on the lifting platform, and the above-mentioned tightening gun is an electric tightening gun, a pneumatic tightening gun, or a hydraulically driven tightening gun. ,

[0007] Features of the present invention:

[0008] The torque input mechanism of the present invention realizes two functions of primary expansion of the tightening mechanism and transmission of the tightening torque through a main transmission shaft; through the contraction of the micro-cylinder piston, the tightening arm front arm and the tightening arm rear arm can be folded 90 degrees, and the bevel gear shaft and the worm gear transmission shaft can also be folded 90 degrees. Description of the drawings:

[0009] Figure 1 The overall structure of the present invention is illustrated.

[0010] Figure 2 The lifting mechanism is shown.

[0011] Figure 3 The positioning and indexing mechanism is illustrated.

[0012] Figure 4 yes Figure 3 sectional view of .

[0013] Figure 5 It is a half-section view of the torque input mechanism.

[0014] Figure 6 yes Figure 5 View of the power input mechanism.

[0015] Figure 7 yes Figure 5 Cross-sectional view of the power transmission switching mechanism.

[0016] Figure 8 yes Figure 7 A partial enlarged view of .

[0017] Fig. 9 yes Figure 7 Exploded view of part of the structure.

[0018] Fig.10 It is a half-section view of the folding tightening mechanism.

[0019] Fig.11 yes Fig.10 Exploded diagram.

[0020] Fig.12 The support housing is illustrated.

[0021] 1. Lifting mechanism; 2. Positioning and indexing mechanism; 3. Torque input mechanism; 4. Support housing; 1-1. Eyebolt; 1-2. Guide column platform; 1-3. Cylinder; 1-4. Guide column; 1-5. Linear bearing I; 1-6. Lifting platform; 1-7. Top support platform; 2-1. Indexing platform; 2-2. Positioning and connecting platform; 3-1. Power input mechanism; 3-2. Power transmission switching mechanism; 3-3. Folding and tightening mechanism; 3-1-1. Linear sliding module; 3-1- 2. Tightening gun; 3-1-3. Adapter slide; 3-1-4. Tightening gun fastening frame; 3-2-1. Linear bearing II; 3-2-2. Linear bearing III; 3-2-3. Main transmission shaft; 3-2-4. Main shaft gear; 3-2-5. Center gear; 3-2-6. Side expansion gear I; 3-2-7. Side bearing I; 3-2-8. Center bearing; 3-2-9. Side bearing II; 3-2-10. Side expansion gear II; 3-3-1 , elastic retaining ring; 3-3-2, side shaft upper end bearing; 3-3-3, torque transmission side shaft; 3-3-4, side shaft gear; 3-3-5, bevel gear I; 3-3-6, bevel gear II; 3-3-7, bevel gear shaft; 3-3-8, rotating pin; 3-3-9, worm gear transmission shaft; 3-3-10, tightening arm front arm; 3-3-11, tightening sleeve; 3-3-12, limit column; 3-3-13, side shaft lower end bearing; 3-3-14, tightening arm Rear arm; 3-3-15, swing support frame; 3-3-16, cylinder swing sleeve; 3-3-17, micro cylinder; 3-3-18, rotating shaft; 3-3-19, retractable joint; 3-3-20, retractable bending rod; 3-3-21, retractable fixing block; 4-1, connecting table; 4-2, shell I; 4-3, connecting frame I; 4-4, shell II; 4-5, connecting frame II; 4-6, shell III; 4-7, connecting frame III; 4-8, chassis. Specific implementation method:

[0022] The specific working process of the present invention is described below in conjunction with the accompanying drawings.

[0023] In the lifting mechanism 1 of the present invention, the eye screw 1-1 is fixed on the guide column platform 1-2, the guide column platform 1-2 and the top support platform 1-7 are fixed on the guide column 1-4, the cylinder 1-3 and the linear bearing I1-5 are fixed on the lifting platform 1-6, in the positioning and indexing mechanism 2, the positioning connection platform 2-2 is fixed on the indexing platform 2-1, in the power input mechanism 3-1, the transfer slider 3-1-3 is fixed on the slide B on the linear sliding module 3-1-1, the tightening gun fastening frame 3-1-4 is fixed on the transfer slider 3-1-3, the tightening gun 3-1-2 is fixed on the tightening gun fastening frame 3-1-4, and in the power transmission switching mechanism 3-2, the main transmission shaft 3-2-3 is set on the linear bearing II3-2-1 and the linear bearing III3-2-2 The main shaft gear 3-2-4 is fixed on the main transmission shaft 3-2-3, the center gear 3-2-5 is arranged on the inner ring of the center bearing 3-2-8, the side unfolding gear I3-2-6 is arranged on the inner ring of the side bearing I3-2-7, the side unfolding gear II3-2-10 is arranged on the inner ring of the side bearing II3-2-9, in the folding tightening mechanism 3-3, the torque transmission side shaft 3-3-3 is arranged on the inner ring of the side shaft upper end bearing 3-3-2 and the side shaft lower end bearing 3-3-13, the elastic retaining ring 3-3-1 is fixed on the torque transmission side shaft 3-3-3, the side shaft gear 3-3-4 is fixed on the torque transmission side shaft 3-3-3, and the bevel gear I3-3-5 is fixed on the torque transmission side shaft 3-3-3 The rotating shaft 3-3-18 is arranged on the rear arm 3-3-14 of the tightening arm, the front arm 3-3-10 of the tightening arm is arranged on the rear arm 3-3-14 of the tightening arm through the rotating shaft 3-3-18, the worm drive shaft 3-3-9 is arranged on the front arm 3-3-10 of the tightening arm, the bevel gear shaft 3-3-7 and the worm drive shaft 3-3-9 are connected by a rotating pin 3-3-8, the bevel gear II3-3-6 is fixed on the bevel gear shaft 3-3-7, the swing support frame 3-3-15 is fixed on the rear arm 3-3-14 of the tightening arm, the cylinder swing sleeve 3-3-16 is arranged on the swing support frame 3-3-15, the micro cylinder 3-3-17 is fixed on the cylinder swing sleeve 3-3-16, and the retractable joint 3-3-19 is fixed on the micro cylinder On the cylinder 3-3-17, the retractable bent rod 3-3-20 is arranged on the retractable joint 3-3-19 and fixed to the retractable fixed block 3-3-21, the retractable fixed block 3-3-21 is fixed on the tightening arm forearm 3-3-10, the tightening sleeve 3-3-11 is arranged on the tightening arm forearm 3-3-10, in the supporting shell 4, the connecting platform 4-1 is fixed on the shell I4-2, the shell I4-2 is fixed on the connecting frame I4-3, the connecting frame I4-3 is fixed on the shell II4-4, the shell II4-4 is fixed on the connecting frame II4-5, the connecting frame II4-5 is fixed on the shell III4-6, the shell III4-6 is fixed on the connecting frame III4-7, and the connecting frame III4-7 is fixed on the chassis 4-8,The main transmission shaft 3-2-3 is arranged on the output head C of the tightening gun 3-1-2, the power transmission switching mechanism 3-2 and the folding tightening mechanism 3-3 are connected through the supporting shell 4, the outer ring of the side bearing I3-2-7 is fixed on the groove D1 of the chassis 4-8, the outer ring of the center bearing 3-2-8 is fixed on the groove D2 of the chassis 4-8, the outer ring of the side bearing II3-2-9 is fixed on the groove D3 of the chassis 4-8, the limiting column 3-3-12 is fixed on the rear arm 3-3-14 of the tightening arm, and the rear arm 3-3-14 of the tightening arm is fixed on the side unfolding gear I3-2-6 through the gear groove E, straight Linear bearing I3-2-1 is fixed on connecting frame I4-3, linear bearing II3-2-2 is fixed on connecting frame II4-5, the outer ring of the upper end bearing 3-3-2 of the side shaft is fixed on connecting frame II4-5, the outer ring of the lower end bearing 3-3-13 of the side shaft is fixed on the rear arm 3-3-14 of the tightening arm, the positioning connecting platform 2-2 is set at the entrance of engine A, the top support platform 1-7 is fixed on the indexing platform 2-1, the linear sliding module 3-1-1 and the connecting platform 4-1 are fixed on the lifting platform 1-6, and the above-mentioned tightening gun 3-1-2 is an electric tightening gun or a pneumatic tightening gun or a hydraulically driven tightening gun.

[0024] The present invention also provides an operating method of an automatic tightening device for a high-pressure rotor connecting nut of an aircraft engine, comprising the following steps:

[0025] The first step is to install and tighten the tightening device on the engine A;

[0026] In the second step, the lifting mechanism 1 descends to drive the torque input mechanism 3 to descend, and the torque input mechanism 3 enters the inner cavity of the rotor assembly;

[0027] In the third step, when the torque input mechanism 3 reaches the specified horizontal position, it stops moving downward, and the linear sliding module 3-1-1 drives the main transmission shaft 3-2-3 to connect with the central gear 3-2-5 by power, and drives the main transmission shaft 3-2-3 to rotate through the tightening gun 3-1-2, so as to realize the first-level unfolding of the folding tightening mechanism 3-3;

[0028] The fourth step is to work through the micro cylinder 3-3-17, the air pressure pushes the piston to generate thrust and extend, and the front arm 3-3-10 of the tightening arm rotates until it is in the same straight line with the rear arm 3-3-14 of the tightening arm, so as to realize the secondary expansion of the folding tightening mechanism 3-3. At this time, the tightening sleeve 3-3-11 is above the nut to be tightened;

[0029] In the fifth step, the linear sliding module 3-1-1 drives the main transmission shaft 3-2-3 to move upward, and the main shaft gear 3-2-4 fixed on the main transmission shaft 3-2-3 meshes with the side shaft gear 3-3-4. The main shaft gear 3-2-4 is driven to rotate by the tightening gun 3-1-2, and the output torque is transmitted to the tightening sleeve 3-3-11. The tightening sleeve 3-3-11 drives the nut to be tightened to be tightened, and the folding tightening mechanism 3-3 is driven to descend synchronously through the lifting mechanism 1 to achieve the tightening of the nut;

[0030] In the sixth step, the folding tightening mechanism 3-3 is driven to rise by the lifting mechanism 1, and the torque input mechanism 3 is transferred to the next nut to be tightened by using the indexing table 2-1, and step five is repeated to complete the tightening of the remaining nuts.

Claims

1. An automatic tightening device for connecting nuts of an engine rotor, comprising a lifting mechanism (1), a positioning and indexing mechanism (2), a torque input mechanism (3) and a supporting shell (4), wherein the lifting mechanism (1) comprises a lifting eye screw (1-1), a guide column platform (1-2), a cylinder (1-3), a guide column (1-4), a linear bearing I (1-5), a lifting platform (1-6) and a top supporting platform (1-7), the positioning and indexing mechanism (2) comprises a indexing platform (2-1) and a positioning and connecting platform (2-2), the torque input mechanism (3) comprises a power input mechanism (3-1), a power transmission switching mechanism (3-2) and a folding The invention relates to a tightening mechanism (3-3), wherein the power input mechanism (3-1) is composed of a linear sliding module (3-1-1), a tightening gun (3-1-2), a transfer slider (3-1-3) and a tightening gun fastening frame (3-1-4), and the power transmission switching mechanism (3-2) is composed of a linear bearing II (3-2-1), a linear bearing III (3-2-2), a main transmission shaft (3-2-3), a main shaft gear (3-2-4), a center gear (3-2-5), a side expansion gear I (3-2-6), a side bearing I (3-2-7), a center bearing (3-2-8), a side bearing II (3-2-1), a main transmission shaft (3-2-3), a main shaft gear (3-2-4), a center gear (3-2-5), a side expansion gear I (3-2-6), a side bearing I (3-2-7), a center bearing (3-2-8), a side bearing II (3-2-1), a main transmission shaft (3-2-3), a main shaft gear (3-2-4), a center gear (3-2-5), a side expansion gear I (3-2-6), a side bearing I (3-2-7), a center bearing (3-2-8), a side bearing II (3-2-1), a main transmission shaft (3-2-1 ... The folding tightening mechanism (3-3) is composed of an elastic retaining ring (3-3-1), a side shaft upper end bearing (3-3-2), a torque transmission side shaft (3-3-3), a side shaft gear (3-3-4), a bevel gear I (3-3-5), a bevel gear II (3-3-6), a bevel gear shaft (3-3-7), a rotating pin (3-3-8), a worm gear transmission shaft (3-3-9), a tightening arm front arm (3-3-10), a tightening sleeve (3-3-11), a limit column (3-3-12), a side shaft lower end bearing (3-3-13), The tightening arm rear arm (3-3-14), the swing support frame (3-3-15), the cylinder swing sleeve (3-3-16), the micro cylinder (3-3-17), the rotating shaft (3-3-18), the retractable joint (3-3-19), the retractable bending rod (3-3-20) and the retractable fixing block (3-3-21) are composed, and the supporting shell (4) is composed of a connecting platform (4-1), a shell I (4-2), a connecting frame I (4-3), a shell II (4-4), a connecting frame II (4-5), a shell III (4-6), a connecting frame III (4-7) and a chassis (4-8), characterized in that: In the lifting mechanism (1), the eye screw (1-1) is fixed on the guide column platform (1-2), the guide column platform (1-2) and the top support platform (1-7) are fixed on the guide column (1-4), the cylinder (1-3) and the linear bearing I (1-5) are fixed on the lifting platform (1-6), in the positioning and indexing mechanism (2), the positioning connection platform (2-2) is fixed on the indexing platform (2-1), in the power input mechanism (3-1), the transfer slider (3-1-3) is fixed on the slide (B) on the linear sliding module (3-1-1), the tightening gun fastening frame (3-1-4) is fixed on the transfer slider (3-1-3), the tightening gun (3-1-2) is fixed on the tightening gun fastening frame (3-1-4), and the power transmission switching mechanism (3 -2), the main transmission shaft (3-2-3) is arranged on the inner rings of the linear bearing II (3-2-1) and the linear bearing III (3-2-2), the main shaft gear (3-2-4) is fixed on the main transmission shaft (3-2-3), the center gear (3-2-5) is arranged on the inner ring of the center bearing (3-2-8), the side expansion gear I (3-2-6) is arranged on the inner ring of the side bearing I (3-2-7), the side expansion gear II (3-2-10) is arranged on the inner ring of the side bearing II (3-2-9), in the folding tightening mechanism (3-3), the torque transmission side shaft (3-3-3) is arranged on the inner rings of the side shaft upper end bearing (3-3-2) and the side shaft lower end bearing (3-3-13), and the elastic retaining ring (3-3-1) is fixed on the torque transmission side shaft (3-3-3), the side shaft gear (3-3-4) is fixed on the torque transmission side shaft (3-3-3), the bevel gear I (3-3-5) is fixed on the torque transmission side shaft (3-3-3), the rotating shaft (3-3-18) is arranged on the tightening arm rear arm (3-3-14), the tightening arm front arm (3-3-10) is arranged on the tightening arm rear arm (3-3-14) through the rotating shaft (3-3-18), the worm gear transmission shaft (3-3-9) is arranged on the tightening arm front arm (3-3-10), the bevel gear shaft (3-3-7) and the worm gear transmission shaft (3-3-9) are connected by a rotating pin (3-3-8), and the bevel gear II (3-3-6) is fixed on the bevel gear shaft (3-3-7), a swing support frame (3-3-15) is fixed on the rear arm (3-3-14) of the tightening arm, a cylinder swing sleeve (3-3-16) is arranged on the swing support frame (3-3-15), a micro cylinder (3-3-17) is fixed on the cylinder swing sleeve (3-3-16), a retractable joint (3-3-19) is fixed on the micro cylinder (3-3-17), a retractable bent rod (3-3-20) is arranged on the retractable joint (3-3-19) and fixed to a retractable fixed block (3-3-21), the retractable fixed block (3-3-21) is fixed on the front arm (3-3-10) of the tightening arm, a tightening sleeve (3-3-11) is arranged on the front arm (3-3-10) of the tightening arm, and a support shell (4) is provided.The connecting platform (4-1) is fixed on the shell I (4-2), the shell I (4-2) is fixed on the connecting frame I (4-3), the connecting frame I (4-3) is fixed on the shell II (4-4), the shell II (4-4) is fixed on the connecting frame II (4-5), the connecting frame II (4-5) is fixed on the shell III (4-6), the shell III (4-6) is fixed on the connecting frame III (4-7), and the connecting frame III (4-7 ) is fixed on the chassis (4-8), the main transmission shaft (3-2-3) is arranged on the output head (C) of the tightening gun (3-1-2), the power transmission switching mechanism (3-2) and the folding tightening mechanism (3-3) are connected through the supporting shell (4), the outer ring of the side bearing I (3-2-7) is fixed on the groove (D1) of the chassis (4-8), the outer ring of the center bearing (3-2-8) is fixed on the groove (D2) of the chassis (4-8), and the side The outer ring of bearing II (3-2-9) is fixed on the groove (D3) of the chassis (4-8), the limit column (3-3-12) is fixed on the rear arm of the tightening arm (3-3-14), the rear arm of the tightening arm (3-3-14) is fixed on the side expansion gear I (3-2-6) through the gear groove (E), the linear bearing I (3-2-1) is fixed on the connecting frame I (4-3), and the linear bearing II (3-2-2) is fixed on the connecting frame II (4 -5), the outer ring of the upper end bearing (3-3-2) of the side shaft is fixed on the connecting frame II (4-5), the outer ring of the lower end bearing (3-3-13) of the side shaft is fixed on the rear arm (3-3-14) of the tightening arm, the positioning connecting platform (2-2) is set at the entrance of the engine (A), the top support platform (1-7) is fixed on the indexing platform (2-1), and the linear sliding module (3-1-1) and the connecting platform (4-1) are fixed on the lifting platform (1-6).

2. The automatic tightening device for connecting nuts of engine rotors according to claim 1, characterized in that: The tightening gun (3-1-2) is an electric tightening gun, a pneumatic tightening gun, or a hydraulically driven tightening gun.

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