Automatic engine rotor connecting nut tightening device

Abstract

An engine rotor connecting nut automatic tightening device, it includes: lifting mechanism, positioning indexing mechanism, torque input mechanism and support shell, lifting mechanism is by lifting eye bolt, guide column table, cylinder, guide column, linear bearing I, lifting platform and top support table are composed, positioning indexing mechanism is by indexing table and positioning connecting table are composed, torque input mechanism is by power input mechanism, power transmission switching mechanism and folding tightening mechanism are composed, support shell is by connecting table, shell I, connecting frame I, shell II, connecting frame II, shell III, connecting frame III and chassis are composed, the present application is as a kind of engine rotor connecting nut automatic tightening device, to solve the problem that existing aero-engine rotor connecting nut is difficult to assemble in small space.

Description

Technical fields:

[0001] This invention relates to an automatic tightening device for engine rotor connecting nuts, belonging to the field of aero-engine assembly technology. Background technology:

[0002] The engine rotor is a crucial power component of an aero-engine, and the assembly quality of the rotor connecting nut directly affects the overall engine performance. The assembly of the rotor connecting nut is challenging due to the narrow internal inlet of the engine and the deep location of the nut. Currently, the assembly of rotor connecting nuts for most aero-engine models can only be achieved through manual mechanical tooling or devices with low levels of automation. Therefore, researching a highly automated nut tightening device with high control precision to achieve efficient and high-precision automated assembly of engine nuts is of great significance. Summary of the Invention:

[0003] The purpose of this invention is:

[0004] An automatic tightening device for engine rotor connecting nuts is proposed to solve the problem of difficult assembly of existing aero-engine rotor connecting nuts in confined spaces.

[0005] To achieve the objectives of this invention, the following technical solution is proposed:

[0006] This invention includes: a lifting mechanism, a positioning and indexing mechanism, a torque input mechanism, and a supporting housing. The lifting mechanism consists of a lifting eye bolt, a guide column, a cylinder, a guide column, a linear bearing I, a lifting platform, and a top support platform. The positioning and indexing mechanism consists of an indexing table and a positioning connecting table. The torque input mechanism consists of a power input mechanism, a power transmission switching mechanism, and a folding and tightening mechanism. The power input mechanism consists of a linear sliding module, a tightening gun, an adapter slider, and a tightening gun fastening bracket. The power transmission switching mechanism consists of linear bearing II, linear bearing III, a main drive shaft, a main shaft gear, a center gear, a side unfolding gear I, a side bearing I, a center bearing, a side bearing II, and a side unfolding gear II. The folding and tightening mechanism consists of an elastic retaining ring, a side shaft upper bearing, and a torque transmission... The system comprises a side shaft, side shaft gear, bevel gear I, bevel gear II, bevel gear shaft, rotating pin, worm gear drive shaft, tightening arm front arm, tightening sleeve, limiting post, side shaft lower end bearing, tightening arm rear arm, swing support frame, cylinder swing sleeve, miniature cylinder, rotating shaft, retraction joint, retraction bending rod, and retraction fixing block. The support shell consists of a connecting platform, shell I, connecting frame I, shell II, connecting frame II, shell III, connecting frame III, and chassis. The lifting mechanism is characterized by: the lifting eye screw fixed to the guide column platform, the guide column platform and the top support platform fixed to the guide column, the cylinder and linear bearing I fixed to the lifting platform; the positioning and indexing mechanism, the positioning connecting platform fixed to the indexing platform; and the power input mechanism, the transfer slider fixed to the linear sliding mold. On the slide of the assembly, the tightening gun fastener is fixed to the adapter slider, and the tightening gun is fixed to the tightening gun fastener. In the power transmission switching mechanism, the main drive shaft is mounted on the inner rings of linear bearings II and III, the main shaft gear is fixed on the main drive shaft, the center gear is mounted on the inner ring of the center bearing, the side unfolding gear I is mounted on the inner ring of side bearing I, and the side unfolding gear II is mounted on the inner ring of side bearing II. In the folding tightening mechanism, the torque transmission side shaft is mounted on the inner rings of the upper and lower bearings of the side shaft, 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 mounted on the rear arm of the tightening arm, and the front arm of the tightening arm is mounted on the rotating shaft. On the rear arm of the tightening arm, the worm gear drive shaft is mounted on the front arm of the tightening arm. The bevel gear shaft and the worm gear drive shaft are connected by a rotating pin. 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 mounted on the swing support frame. The miniature cylinder is fixed on the cylinder swing sleeve. The retractable connector is fixed on the miniature cylinder. The retractable bending rod is mounted on the retractable connector and fixed to the retractable fixing block. The retractable fixing block is fixed on the front arm of the tightening arm. The tightening sleeve is mounted on the front arm of the tightening arm. In the support housing, the connecting platform is fixed on housing I. Housing I is fixed on connecting frame I. Connecting frame I is fixed on housing II. Housing II is fixed on connecting frame II. Connecting frame II is fixed on housing III. Housing III is fixed on connecting frame III.Connecting frame III is fixed to the chassis. The main drive shaft is mounted on the output head of the tightening gun. The power transmission switching mechanism and the folding tightening mechanism are connected through the support housing. The outer ring of side bearing I is fixed to a groove in the chassis. The outer ring of the center bearing is fixed to a groove in the chassis. The outer ring of side bearing II is fixed to a groove in the chassis. The limiting post is fixed to the rear arm of the tightening arm. The rear arm of the tightening arm is fixed to the side unfolding gear I through a gear groove. Linear bearing I is fixed to connecting frame I. Linear bearing II is fixed to connecting frame II. The outer ring of the upper side shaft bearing is fixed to connecting frame II. The outer ring of the lower side shaft bearing is fixed to the rear arm of the tightening arm. The positioning connecting platform is located at the engine inlet. The top support platform is fixed to the indexing platform. The linear sliding module and the connecting platform are fixed to the lifting platform. The tightening gun described above is an electric tightening gun, a pneumatic tightening gun, or a hydraulically driven tightening gun.

[0007] Features of this invention:

[0008] The torque input mechanism of this invention realizes two functions: the first-stage unfolding of the tightening mechanism and the transmission of tightening torque through a main drive shaft; through the retraction of the micro cylinder piston, the front arm and rear arm of the tightening arm can be folded at 90 degrees, and the bevel gear shaft and worm gear drive shaft can also be folded at 90 degrees. Attached Figure Description

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

[0010] Figure 2 The lifting mechanism is shown.

[0011] Figure 3 The diagram illustrates the positioning and indexing mechanism.

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

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

[0014] Figure 6 yes Figure 5 A 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 magnified view of a portion of the image.

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

[0018] Figure 10 This is a half-sectional view of the folding and tightening mechanism.

[0019] Figure 11 yes Figure 10 Exploded view.

[0020] Figure 12 The diagram illustrates the supporting outer shell.

[0021] 1. Lifting mechanism; 2. Positioning and indexing mechanism; 3. Torque input mechanism; 4. Support housing; 1-1. Eye bolt; 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 connection 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 slider; 3-1-4. Tightening gun fastening bracket; 3-2-1. Linear bearing II; 3-2-2. Linear bearing III; 3-2-3. Main drive shaft; 3-2-4. Main shaft gear; 3-2-5. Center gear; 3-2-6. Side unfolding gear I; 3-2-7. Side bearing I; 3-2-8. Center bearing; 3-2-9. Side bearing II; 3-2-10. Side unfolding gear II; 3-3-1 3-3-11 Elastic retaining ring; 3-3-2 Upper bearing of side shaft; 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 drive shaft; 3-3-10 Tightening arm forearm; 3-3-11 Tightening sleeve; 3-3-12 Limiting post; 3-3-13 Lower bearing of side shaft; 3-3-14 Tightening arm Rear arm; 3-3-15, Swing support frame; 3-3-16, Cylinder swing sleeve; 3-3-17, Miniature cylinder; 3-3-18, Rotating shaft; 3-3-19, Retractable connector; 3-3-20, Retractable bending rod; 3-3-21, Retractable fixing block; 4-1, Connecting platform; 4-2, Outer shell I; 4-3, Connecting frame I; 4-4, Outer shell II; 4-5, Connecting frame II; 4-6, Outer shell III; 4-7, Connecting frame III; 4-8, Chassis. Detailed implementation method:

[0022] The specific working process of the present invention will be described below with reference to the accompanying drawings.

[0023] In the lifting mechanism 1 of this invention, the lifting 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 connecting platform 2-2 is fixed on the indexing platform 2-1. In the power input mechanism 3-1, the adapter slider 3-1-3 is fixed on the slide B on the linear sliding module 3-1-1, the tightening gun fastening bracket 3-1-4 is fixed on the adapter slider 3-1-3, and the tightening gun 3-1-2 is fixed on the tightening gun fastening bracket 3-1-4. In the power transmission switching mechanism 3-2, the main drive shaft 3-2-3 is set on the linear bearing II 3-2-1 and the linear bearing III 3-2-2. On the inner ring, the main shaft gear 3-2-4 is fixed on the main drive shaft 3-2-3, the central gear 3-2-5 is set on the inner ring of the central bearing 3-2-8, the side unfolding gear I 3-2-6 is set on the inner ring of the side bearing I 3-2-7, and the side unfolding gear II 3-2-10 is set on the inner ring of the side bearing II 3-2-9. In the folding and tightening mechanism 3-3, the torque transmission side shaft 3-3-3 is set on the inner rings of the upper side shaft bearing 3-3-2 and the lower side shaft 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 I 3-3-5 is fixed on the torque transmission side shaft 3-3-3. The rotating shaft 3-3-18 is mounted on the rear arm 3-3-14 of the tightening arm, and the front arm 3-3-10 of the tightening arm is mounted on the rear arm 3-3-14 via the rotating shaft 3-3-18. The worm gear drive shaft 3-3-9 is mounted on the front arm 3-3-10 of the tightening arm. The bevel gear shaft 3-3-7 and the worm gear drive shaft 3-3-9 are connected by a rotating pin 3-3-8. The bevel gear II 3-3-6 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 mounted on the swing support frame 3-3-15. The miniature cylinder 3-3-17 is fixed on the cylinder swing sleeve 3-3-16. The retractable connector 3-3-19 is fixed on the miniature cylinder. On cylinder 3-3-17, the retractable bending rod 3-3-20 is mounted on the retractable connector 3-3-19 and fixed to the retractable fixing block 3-3-21. The retractable fixing block 3-3-21 is fixed to the tightening arm forearm 3-3-10. The tightening sleeve 3-3-11 is mounted on the tightening arm forearm 3-3-10. In the supporting housing 4, the connecting platform 4-1 is fixed to housing I4-2. Housing I4-2 is fixed to the connecting frame I4-3. The connecting frame I4-3 is fixed to housing II4-4. Housing II4-4 is fixed to the connecting frame II4-5. The connecting frame II4-5 is fixed to housing III4-6. Housing III4-6 is fixed to the connecting frame III4-7. The connecting frame III4-7 is fixed to the chassis 4-8.The main drive shaft 3-2-3 is mounted 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 housing 4. The outer ring of the side bearing I 3-2-7 is fixed in the groove D1 of the chassis 4-8, the outer ring of the center bearing 3-2-8 is fixed in the groove D2 of the chassis 4-8, the outer ring of the side bearing II 3-2-9 is fixed in the groove D3 of the chassis 4-8, the limiting post 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 I 3-2-6 through the gear groove E. Linear bearing I3-2-1 is fixed to connecting bracket I4-3; linear bearing II3-2-2 is fixed to connecting bracket II4-5; the outer ring of the upper side shaft bearing 3-3-2 is fixed to connecting bracket II4-5; the outer ring of the lower side shaft bearing 3-3-13 is fixed to the rear arm 3-3-14 of the tightening arm; positioning connecting platform 2-2 is set at the engine A inlet; top support platform 1-7 is fixed to indexing platform 2-1; linear sliding module 3-1-1 and connecting platform 4-1 are fixed to lifting platform 1-6; the tightening gun 3-1-2 mentioned above is an electric tightening gun, a pneumatic tightening gun, or a hydraulically driven tightening gun.

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

[0025] First, install and secure the tightening device onto engine A;

[0026] The second step is that the lifting mechanism 1 descends, which drives the torque input mechanism 3 to descend, and the torque input mechanism 3 enters the inner cavity of the rotor assembly;

[0027] Third step, when the torque input mechanism 3 reaches the specified horizontal position, it stops moving down. The linear sliding module 3-1-1 drives the main drive shaft 3-2-3 to connect with the central gear 3-2-5, and drives the main drive shaft 3-2-3 to rotate through the tightening gun 3-1-2, so as to realize the first stage of unfolding of the folding tightening mechanism 3-3.

[0028] The fourth step involves the operation of the micro cylinder 3-3-17, where air pressure pushes the piston to extend, causing the front arm 3-3-10 of the tightening arm to rotate until it is in line with the rear arm 3-3-14 of the tightening arm, thus achieving the second-stage unfolding of the folding tightening mechanism 3-3. At this point, 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 drive shaft 3-2-3 to move upward. The main shaft gear 3-2-4 fixed on the main drive shaft 3-2-3 meshes with the side shaft gear 3-3-4. The tightening gun 3-1-2 drives the main shaft gear 3-2-4 to rotate, transmitting the output torque to the tightening sleeve 3-3-11. The tightening sleeve 3-3-11 drives the nut to be tightened to turn. The lifting mechanism 1 drives the folding tightening mechanism 3-3 to descend synchronously, thus tightening the nut.

[0030] Step 6: The lifting mechanism 1 drives the folding and tightening mechanism 3-3 to rise. Using the indexing table 2-1, the torque input mechanism 3 is rotated to the next nut to be tightened. Step 5 is repeated to complete the tightening of the remaining nuts.

Claims

1. An automatic tightening device for engine rotor connecting nuts, comprising a lifting mechanism (1), a positioning and indexing mechanism (2), a torque input mechanism (3), and a supporting shell (4). The lifting mechanism (1) comprises a lifting eye bolt (1-1), a guide column (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 support platform (1-7). The positioning and indexing mechanism (2) comprises an indexing table (2-1) and a positioning connecting table (2-2). The torque input mechanism (3) comprises a power input mechanism (3-1), a power transmission switching mechanism (3-2), and a folding mechanism. The tightening mechanism (3-3) consists of a power input mechanism (3-1) comprising a linear sliding module (3-1-1), a tightening gun (3-1-2), an adapter slider (3-1-3), and a tightening gun fastening bracket (3-1-4). The power transmission switching mechanism (3-2) comprises linear bearing II (3-2-1), linear bearing III (3-2-2), a main drive shaft (3-2-3), a main shaft gear (3-2-4), a center gear (3-2-5), a side unfolding gear I (3-2-6), a side bearing I (3-2-7), a center bearing (3-2-8), and a side bearing II (3-1-4). The folding and tightening mechanism (3-3) consists of an elastic retaining ring (3-3-1), an upper side shaft 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 drive shaft (3-3-9), a tightening arm forearm (3-3-10), a tightening sleeve (3-3-11), a limiting post (3-3-12), and a lower side shaft bearing (3-3-13). The structure comprises a tightening arm (3-3-14), a swing support frame (3-3-15), a cylinder swing sleeve (3-3-16), a miniature cylinder (3-3-17), a rotating shaft (3-3-18), a retractable connector (3-3-19), a retractable bending rod (3-3-20), and a retractable fixing block (3-3-21). The supporting shell (4) is composed of a connecting platform (4-1), shell I (4-2), connecting frame I (4-3), shell II (4-4), connecting frame II (4-5), shell III (4-6), connecting frame III (4-7), and a chassis (4-8). Its characteristics are: In the lifting mechanism (1), the eye bolt (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 connecting platform (2-2) is fixed on the indexing platform (2-1), in the power input mechanism (3-1), the adapter slider (3-1-3) is fixed on the slide table (B) on the linear sliding module (3-1-1), the tightening gun fastening bracket (3-1-4) is fixed on the adapter slider (3-1-3), the tightening gun (3-1-2) is fixed on the tightening gun fastening bracket (3-1-4), and the power transmission switching mechanism (3 In section -2), the main drive shaft (3-2-3) is mounted on the inner rings of linear bearings II (3-2-1) and III (3-2-2). The main shaft gear (3-2-4) is fixed on the main drive shaft (3-2-3). The center gear (3-2-5) is mounted on the inner ring of the center bearing (3-2-8). The side unfolding gear I (3-2-6) is mounted on the inner ring of side bearing I (3-2-7). The side unfolding gear II (3-2-10) is mounted on the inner ring of side bearing II (3-2-9). In the folding and tightening mechanism (3-3), the torque transmission side shaft (3-3-3) is mounted on the inner rings of the upper side shaft bearing (3-3-2) and the lower side shaft bearing (3-3-13). An elastic retaining ring is also present. (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 set on the rear arm (3-3-14) of the tightening arm, the front arm (3-3-10) of the tightening arm is set on the rear arm (3-3-14) of the tightening arm via the rotating shaft (3-3-18), the worm gear drive shaft (3-3-9) is set on the front arm (3-3-10) of the tightening arm, the bevel gear shaft (3-3-7) and the worm gear drive 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. On (3-3-7), the swing support frame (3-3-15) is fixed on the rear arm of the tightening arm (3-3-14), the cylinder swing sleeve (3-3-16) is set on the swing support frame (3-3-15), the miniature cylinder (3-3-17) is fixed on the cylinder swing sleeve (3-3-16), the retractable connector (3-3-19) is fixed on the miniature cylinder (3-3-17), the retractable bending rod (3-3-20) is set on the retractable connector (3-3-19) and fixed with the retractable fixing block (3-3-21), the retractable fixing block (3-3-21) is fixed on the front arm of the tightening arm (3-3-10), the tightening sleeve (3-3-11) is set on the front arm of the tightening arm (3-3-10), and the support shell (4) is in place.The connecting platform (4-1) is fixed on the outer shell I (4-2), the outer shell I (4-2) is fixed on the connecting frame I (4-3), the connecting frame I (4-3) is fixed on the outer shell II (4-4), the outer shell II (4-4) is fixed on the connecting frame II (4-5), the connecting frame II (4-5) is fixed on the outer shell III (4-6), the outer shell III (4-6) is fixed on the connecting frame III (4-7), the connecting frame III (4-7) is fixed on the chassis (4-8), the main drive shaft (3-2-3) is set 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 outer shell (4), the outer ring of the side bearing I (3-2-7) is fixed on the groove of the chassis (4-8), the outer ring of the center bearing (3-2-8) is fixed on the groove of the chassis (4-8), and the side bearing The outer ring of II (3-2-9) is fixed to the groove of the chassis (4-8). The limiting post (3-3-12) is fixed to the rear arm of the tightening arm (3-3-14). The rear arm of the tightening arm (3-3-14) is fixed to the side unfolding gear I (3-2-6) through the gear groove (E). The linear bearing I (3-2-1) is fixed to the connecting frame I (4-3). The linear bearing II (3-2-2) is fixed to the connecting frame II (4-5). The outer ring of the upper side shaft bearing (3-3-2) is fixed to the connecting bracket II (4-5), and the outer ring of the lower side shaft bearing (3-3-13) is fixed to the rear arm of the tightening arm (3-3-14). The positioning connecting platform (2-2) is set at the engine (A) inlet. The top support platform (1-7) is fixed to the indexing table (2-1), and the linear sliding module (3-1-1) and the connecting platform (4-1) are fixed to the lifting platform (1-6).

2. The automatic tightening device for engine rotor connecting nuts 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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