Multi-degree-of-freedom assembling device for engine production

Abstract

The utility model discloses a multi-degree-of-freedom assembling device for engine production, and relates to the field of engine auxiliary assembling, the multi-degree-of-freedom assembling device comprises two groups of lifting platforms which are oppositely arranged, one side of each lifting platform is provided with a multi-degree-of-freedom tool mechanism, the multi-degree-of-freedom tool mechanism comprises a mounting frame, a lifting mechanism, a swing mechanism, a rolling mechanism and a C-shaped frame, the lifting mechanism comprises a lifting seat, the lifting seat is slidably mounted on the mounting frame, the lifting seat has a degree of freedom of moving in the height direction of the mounting frame, the slewing mechanism comprises a slewing bearing, the slewing bearing is rotatably mounted on the lifting seat, the rolling mechanism comprises a rolling seat, the rolling seat is fixedly mounted on the slewing bearing, the C-shaped frame is rotatably mounted on the rolling seat, and the C-shaped frame is rotatably mounted on the C-shaped frame. The C-shaped frame is used for tooling an engine, the rolling axis of the C-shaped frame and the rotating axis of the slewing bearing are both horizontally arranged, the rolling axis of the C-shaped frame is perpendicular to the rotating axis of the slewing bearing, the C-shaped frame has three degrees of freedom of lifting, rotating and rolling, and the whole machine can be assembled or disassembled at the same station.

Description

Technical Field

[0001] The utility model relates to the field of engine auxiliary assembly, in particular to a multi-freedom assembly device used for engine production. Background Art

[0002] The existing positioners in engine assembly or disassembly workshops cannot meet the needs of complete machine assembly. They can only perform assembly operations on engine parts, such as compressor parts, main combustion unit bodies, turbine parts, fan parts, inner ducts, outer casings, etc., but cannot assemble these parts together. These parts can only be assembled by clamping them on fixed supporting fixtures. Secondly, the current clamping process uses a crane with a simple clamping fixture, and the engine assembly process requires multiple flipping and rotations, and multiple tests are required during the process. The assembly process is complicated and tedious. The existing crane fixture has low positioning accuracy and cannot meet the needs of complete machine assembly. As a result, the disassembly or assembly cycle of an aircraft engine is long, the efficiency is low, and the existing technology development needs cannot be met, which hinders the progress of the aircraft engine industry. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a multi-degree-of-freedom assembly device for engine production, so as to solve the deficiencies of the prior art.

[0004] The objective of the utility model is achieved through the following technical solutions: A multi-degree-of-freedom assembly device for engine production, comprising two sets of lifting platforms arranged opposite to each other, a multi-degree-of-freedom tooling mechanism being provided on one side of the lifting platform, the multi-degree-of-freedom tooling mechanism comprising a mounting frame, a lifting mechanism, a slewing mechanism, a rolling mechanism and a C-frame, the lifting mechanism comprising a lifting seat, the lifting seat being slidably mounted on the mounting frame, the lifting seat having the degree of freedom to move along the height direction of the mounting frame, the slewing mechanism comprising a slewing support, the slewing support being rotatably mounted on the lifting seat, the rolling mechanism comprising a rolling seat, the rolling seat being fixedly mounted on the slewing support, the C-frame being rotatably mounted on the rolling seat, the C-frame being used for tooling the engine, the rolling axis of the C-frame and the slewing axis of the slewing support being both horizontally arranged, and the rolling axis of the C-frame being perpendicular to the slewing axis of the slewing support.

[0005] Furthermore, the lifting mechanism also includes a ball screw and a ball guide rail. The ball screw is vertically arranged and rotatably connected to the mounting frame. The lifting seat is threaded onto the ball screw. The ball guide rail is vertically fixed to the mounting frame. A slider is fixed on the lifting seat. The slider is slidably adapted on the ball guide rail. A brake servo motor is installed on the mounting frame. The output shaft of the brake servo motor is transmission-connected to the input shaft of a worm gear reducer, and the output shaft of the worm gear reducer is transmission-connected to the ball screw.

[0006] Furthermore, the lifting mechanism also includes a counterweight assembly, which is provided on both sides of the ball screw, and the counterweight assembly includes a chain, a counterweight block and a sprocket, the sprocket is rotatably installed above the lifting seat, one end of the chain is connected to the lifting seat, and the other end passes around the sprocket to connect to the counterweight block, the side wall of the counterweight block is rotatably installed with a counterweight roller, a guide plate is installed on the mounting frame, and the counterweight roller cooperates with the guide plate.

[0007] Furthermore, it also includes a lifting pneumatic self-locking mechanism, which includes a self-locking seat, a first connecting rod, a second connecting rod and a self-locking tooth. The self-locking seat is fixed to the side wall of the lifting seat, and a cylinder is installed on the self-locking seat. The telescopic shaft of the cylinder is connected to the first U-shaped block, and the bottom of the self-locking seat is fixed with a second U-shaped block. One end of the first connecting rod is rotatably connected to the second U-shaped block, and the other end is connected to the self-locking tooth. One end of the second connecting rod is rotatably connected to the first U-shaped block, and the other end is rotatably connected to the first connecting rod. A spur rack is vertically installed on the mounting frame, and the self-locking tooth engages or disengages with the spur rack through deflection.

[0008] Furthermore, a worm gear is mounted on the slewing bearing, a servo motor is mounted on the lifting seat, the servo motor is connected to a reducer, the reducer is connected to a worm, and the worm engages with the worm gear.

[0009] Furthermore, a self-locking gear is mounted on the rolling seat, and a rotary pneumatic self-locking mechanism is installed on the lifting seat. The structure of the rotary pneumatic self-locking mechanism is the same as that of the lifting pneumatic self-locking mechanism. The self-locking teeth in the rotary pneumatic self-locking mechanism engage or disengage with the self-locking gear through deflection.

[0010] Furthermore, an arc-shaped rack is installed on the outer arc surface of the C-shaped frame, and an opening is provided at one end of the rolling seat close to the C-shaped frame. A main shaft is rotatably installed in the opening of the rolling seat, and a driving gear is mounted on the main shaft. The driving gear engages with the arc-shaped rack, and a brake servo motor is installed on the rolling seat. The brake servo motor is connected to the rolling worm gear reducer, and the rolling worm gear reducer is connected to the main shaft.

[0011] Furthermore, arc-shaped ribs are fixed on both sides of the C-shaped frame, and a number of limiting rollers are rollingly fitted on both sides of the arc-shaped ribs. The limiting rollers are rotatably mounted on the rolling seat, and a universal ball bearing is mounted on the rolling seat. The universal ball of the universal ball bearing contacts the end of the arc-shaped rib away from the C-shaped frame.

[0012] Furthermore, the C-shaped frame is symmetrically provided with two sets of tooling components along its own radial direction, and the tooling components include two tooling frames, which are respectively installed on both sides of the axial direction of the forming frame by bolts, and a C-shaped tooling frame is provided above the tooling frame, and the two ends of the opening of the C-shaped tooling frame are respectively connected to the two tooling frames, and tooling sections are fixed on the inner side of the tooling frame and the inner side of the C-shaped tooling frame, and bolt holes are opened through the tooling sections.

[0013] Furthermore, the lifting platform includes a chassis, a hydraulic scissor mechanism, a top plate and a telescopic plate. The two ends of the hydraulic scissor mechanism are respectively connected to the chassis and the top plate. The telescopic plate is slidably installed on the top plate. A lifting ladder is provided on the chassis. An oil receiving chassis is installed at the bottom of the mounting frame. The oil receiving chassis extends between the two groups of lifting platforms.

[0014] The beneficial effects of the utility model are:

[0015] 1. It has three degrees of freedom, namely lifting, rotation and rolling, so that the whole machine can be assembled or disassembled at the same station.

[0016] 2. By replacing tooling components, the assembly or disassembly of aircraft engines of different models can be met.

[0017] 3. It has high positioning accuracy, short assembly time and simple assembly process.

[0018] 4. It has triple self-locking function, which greatly maintains the stability and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a partial schematic diagram of a multi-degree-of-freedom assembly device for engine production according to the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of an assembly of a multi-degree-of-freedom assembly device for engine production according to the present invention;

[0021] Figure 3 This is a partial schematic diagram of a multi-degree-of-freedom assembly device for engine production according to the present invention. Figure 2 ;

[0022] Figure 4This is a partial schematic diagram of a multi-degree-of-freedom assembly device for engine production according to the present invention. Figure 3 ;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a schematic structural diagram of a multi-degree-of-freedom assembly device for engine production according to the present invention;

[0025] Figure 7 This is a partial schematic diagram of a multi-degree-of-freedom assembly device for engine production according to the present invention. Figure 4 ;

[0026] Figure 8 This is a partial schematic diagram of a multi-degree-of-freedom assembly device for engine production according to the present invention. Figure 5 ;

[0027] In the figure, 1-mounting frame, 2-C-type frame, 3-lifting seat, 4-slewing bearing, 5-roller seat, 6-ball screw, 7-ball guide rail, 8-slider, 9-brake servo motor, 10-worm gear reducer, 11-chain, 12-counterweight, 13-sprocket, 14-counterweight roller, 15-guide plate, 16-self-locking seat, 17-first connecting rod, 18-second connecting rod, 19-self-locking teeth, 20-spur rack, 21-cylinder, 22-first U-shaped Block, 23-second U-shaped block, 24-reducer, 25-reducer, 26-self-locking gear, 27-arc rack, 28-spindle, 29-drive gear, 30-brake servo motor, 31-arc rib, 32-limit roller, 33-universal ball bearing, 34-tooling frame, 35-tooling section, 36-C-type tooling frame, 37-chassis, 38-hydraulic scissor mechanism, 39-top plate, 40-telescopic plate, 41-lifting ladder, 42-oil receiving chassis. DETAILED DESCRIPTION

[0028] Example 1

[0029] like Figures 1 to 8As shown, a multi-degree-of-freedom assembly device for engine production includes two sets of lifting platforms arranged opposite to each other, and a multi-degree-of-freedom tooling mechanism is provided on one side of the lifting platform. The multi-degree-of-freedom tooling mechanism includes a mounting frame 1, a lifting mechanism, a slewing mechanism, a rolling mechanism and a C-frame 2. The lifting mechanism includes a lifting seat 3, which is slidably mounted on the mounting frame 1 and has the freedom to move along the height direction of the mounting frame 1. The slewing mechanism includes a slewing support 4, which is rotatably mounted on the lifting seat 3. The rolling mechanism includes a rolling seat 5, which is fixedly mounted on the slewing support 4. The C-frame 2 rotates The C-frame 2 is dynamically mounted on the rolling seat 5. The C-frame 2 is used for tooling the engine. The rolling axis of the C-frame 2 and the rotation axis of the slewing support 4 are both horizontally arranged, and the rolling axis of the C-frame 2 is perpendicular to the rotation axis of the slewing support 4. The C-frame 2 is symmetrically provided with two sets of tooling components along its own radial direction. The tooling components include two tooling frames 34. The two tooling frames 34 are respectively installed on both sides of the axial direction of the forming frame 2 by bolts. A C-frame 36 is provided above the tooling frame 34. The two ends of the opening of the C-frame 36 are respectively connected to the two tooling frames 34. The inner side of the tooling frame 34 and the inner side of the C-frame 36 are fixed. There is a tooling section 35, and bolt holes are opened throughout the tooling section 35. The tooling section 35 corresponds to the tooling holes of the engine parts. The tooling section 35 is connected to the engine parts with bolts, and the various parts of the engine are assembled together in turn. During the assembly process, the tooling position is adjusted accordingly according to the assembly needs of the parts, so as to meet the tooling needs of different postures and gradually complete the assembly of various parts. The specific adjustment process is: the lifting and lowering movement of the lifting seat 3 drives the C-frame 2 to move up and down, so as to drive the parts of the tooling on the C-frame 2 to move, and adjust the height between the assembled parts. The rotation of 4 drives the C-frame 2 to rotate. The rotation axis of the slewing support 4 is perpendicular to the assembly direction, thereby adjusting the angle between the two assembled parts. The C-frame 2 can roll on the rolling seat 5. The rolling axis of the C-frame 2 is parallel to the assembly direction, adjusting the position of the mating surfaces of the two assembled parts, mainly corresponding to the mounting holes between the two parts; it has three degrees of freedom, namely lifting, rotation, and rolling, so that the assembly or disassembly of the entire machine can be completed at the same workstation; the tooling frame 34 is detachably connected by bolts. By disassembling and replacing different types of tooling frames 34, it can meet the assembly or disassembly of different types of aircraft engines.

[0030] Furthermore, if Figure 2 and Figure 7As shown, the lifting platform includes a chassis 37, a hydraulic scissor mechanism 38, a top plate 39 and a telescopic plate 40. The two ends of the hydraulic scissor mechanism 38 are respectively connected to the chassis 37 and the top plate 39. The telescopic plate 40 is slidably mounted on the top plate 39. A lifting ladder 41 is provided on the chassis 37. An oil receiving chassis 42 is installed at the bottom of the mounting frame 1. The oil receiving chassis 42 extends between the two sets of lifting platforms. The top plate 39 is driven up and down by the extension and contraction of the hydraulic scissor mechanism 38 to adjust the height of the top plate 39, so that the staff can complete the assembly or disassembly of the engine on the telescopic plate 40. Secondly, the telescopic plate 40 can move and adjust the horizontal position on the top plate 39, so that the staff can move along the assembly or disassembly direction of the engine to complete the assembly or disassembly of the engine. The oil receiving chassis 42 is used to receive oil and impurities dripping from the engine.

[0031] Example 2

[0032] Based on the first embodiment, Figures 1 to 5 As shown, the lifting mechanism also includes a ball screw 6 and a ball guide rail 7. The ball screw 6 is vertically arranged and rotatably connected to the mounting frame 1. The lifting seat 3 is threaded on the ball screw 6. The ball guide rail 7 is vertically fixed to the mounting frame 1. A slider 8 is fixed on the lifting seat 3, and the slider 8 is slidably adapted on the ball guide rail 7. A brake servo motor 9 is installed on the mounting frame 1. The output shaft of the brake servo motor 9 is connected to the input shaft of the worm gear reducer 10. The output shaft of the worm gear reducer 10 is connected to the ball screw 6. The brake servo motor 9 drives the ball screw 6 to rotate through the worm gear reducer 10. The moving direction of the lifting seat 3 is guided by the sliding cooperation of the slider 8 and the ball guide rail 7, so that the lifting seat 3 moves up and down along the axial direction of the ball screw 6, thereby driving the C-shaped frame 2 and the parts of the tooling thereon to move up and down, and adjusting the assembly height between the parts.

[0033] Example 3

[0034] Based on the second embodiment, Figures 1 to 3The lifting mechanism further comprises a counterweight assembly, and a counterweight assembly is provided on both sides of the ball screw 6. The counterweight assembly comprises a chain 11, a counterweight block 12 and a sprocket 13. The sprocket 13 is rotatably installed above the lifting seat 3. One end of the chain 11 is connected to the lifting seat 3, and the other end passes through the sprocket 13 to connect the counterweight block 12. The side wall of the counterweight block 12 is rotatably installed with a counterweight roller 14. A guide plate 15 is installed on the mounting frame 1. The counterweight roller 14 cooperates with the guide plate 15 to reduce the load-bearing capacity of the ball screw through the counterweight assembly. Specifically, when the lifting seat 3 moves up or down, the counterweight block 12 moves down or up through the chain 11. After the height adjustment of the lifting seat 3 is completed, the counterweight block 12 lifts the lifting seat 3 upward through the chain 11, thereby reducing the load-bearing capacity of the ball screw 6 to reduce the power of the brake servo motor 9, fully ensuring the safety of the equipment. The counterweight block 12 can slide up and down smoothly through the sliding cooperation between the counterweight roller 14 and the guide plate 15.

[0035] Example 4

[0036] Based on the third embodiment, Figures 1 to 5 As shown, it also includes a lifting pneumatic self-locking mechanism, which includes a self-locking seat 16, a first connecting rod 17, a second connecting rod 18 and a self-locking tooth 19. The self-locking seat 16 is fixed to the side wall of the lifting seat 3, and a cylinder 21 is installed on the self-locking seat 16. The telescopic shaft of the cylinder 21 is connected to the first U-shaped block 22, and the bottom of the self-locking seat 16 is fixed with a second U-shaped block 23. One end of the first connecting rod 17 is rotatably connected to the second U-shaped block 23, and the other end is connected to the self-locking tooth 19. One end of the second connecting rod 18 is rotatably connected to the first U-shaped block 22, and the other end is rotatably connected to the first connecting rod 17. A straight rack 20 is vertically installed on the mounting frame 1, and the self-locking tooth 19 engages or disengages with the straight rack 20 by deflection. The cylinder 21 carries The first U-shaped block 22 is moved up and down, so that the first U-shaped block 22 drives the second connecting rod 18 to deflect. The deflection of the second connecting rod 18 will pull the first connecting rod 17 to deflect, so that the first connecting rod 17 drives the self-locking teeth 19 to rotate closer to or away from the spur rack 20. When the height adjustment of the lifting seat 3 is completed, the self-locking teeth 19 engage the spur rack 20. The lifting seat 3 is locked by the engagement of the self-locking teeth 19 and the spur rack 20, ensuring that when the whole machine stops at any position, it can remain stationary when the system is powered off. The brake servo motor 9 and the worm gear reducer 10 both have a self-locking function, and together with the self-locking of the lifting pneumatic self-locking mechanism, triple self-locking is achieved, which greatly maintains the stability and safety of the equipment and avoids accidental damage to the whole machine.

[0037] Example 4

[0038] Based on the third embodiment, Figure 1 and Figure 2As shown, a worm gear is mounted on the slewing support 4, and a servo motor 24 is mounted on the lifting seat 3. The servo motor 14 is connected to a reducer 25, and the reducer 24 is connected to a worm. The worm engages with the worm gear, and the servo motor 24 drives the reducer 24 to operate. The reducer 24 drives the slewing support 4 to rotate through the engagement of the worm and the worm gear. The slewing support 4 drives the C-frame 2 and the parts thereon to rotate to adjust the assembly position.

[0039] Furthermore, if Figures 1 to 7 As shown, a self-locking gear 26 is mounted on the rolling seat 5, and a rotary pneumatic self-locking mechanism is installed on the lifting seat 3. The structure of the rotary pneumatic self-locking mechanism is the same as that of the lifting pneumatic self-locking mechanism. The self-locking teeth in the rotary pneumatic self-locking mechanism engage or disengage with the self-locking gear 26 through deflection, and the meshing of the worm gear has a self-locking effect. Combined with the self-locking of the rotary pneumatic self-locking mechanism, the position of the rolling seat 5 and the slewing support 4 can be well locked. The structure and action process of the rotary pneumatic self-locking mechanism are the same as those of the lifting pneumatic self-locking mechanism. The self-locking teeth 19 in the lifting pneumatic self-locking mechanism cooperate with the spur rack 20 to achieve self-locking, and the self-locking teeth in the rotary pneumatic self-locking mechanism cooperate with the self-locking gear 26 to complete self-locking.

[0040] Example 5

[0041] Based on the fourth embodiment, Figures 1 to 8 As shown, an arc-shaped rack 27 is installed on the outer arc surface of the C-shaped frame 2, and an opening is provided at one end of the rolling seat 5 close to the C-shaped frame 2. A main shaft 28 is rotatably installed in the opening of the rolling seat 5. A driving gear 29 is mounted on the main shaft 28, and the driving gear 29 engages with the arc-shaped rack 27. A brake servo motor 30 is installed on the rolling seat 5. The brake servo motor 30 is connected to the rolling worm gear reducer, and the rolling worm gear reducer is connected to the main shaft 28. The brake servo motor 30 drives the rolling worm gear reducer to operate, and the rolling worm gear reducer drives the main shaft 28 to rotate. The main shaft 28 drives the driving gear 29 to rotate. The driving gear 29 drives the C-shaped frame 2 to roll by engaging with the arc-shaped rack 27 to adjust the relative position between the two assembled parts.

[0042] Furthermore, curved ribs 31 are fixed on both sides of the C-shaped frame 2. A plurality of limiting rollers 32 are rollingly engaged on both sides of the curved ribs 31. The limiting rollers 32 are rotatably mounted on the rolling seat 5. A universal ball bearing 33 is mounted on the rolling seat 5. The universal ball of the universal ball bearing 33 contacts the end of the curved rib 31 away from the C-shaped frame 2. The C-shaped frame 2 is rotatably mounted on the rolling seat 5 through the cooperation of the limiting rollers 32 and the curved ribs 31, preventing the C-shaped frame 2 from falling off the rolling seat 5. The universal ball bearing 33 presses the C-shaped frame 2 tightly against the rolling seat 5 without affecting the rotational freedom of the C-shaped frame 2, making the rotational motion of the C-shaped frame 2 more stable.

[0043] In summary, the multi-degree-of-freedom assembly device has three degrees of freedom, namely, lifting, rotation, and rolling, so that the assembly or disassembly of the entire machine can be completed at the same workstation.

Claims

1. A multi-degree-of-freedom assembly device for engine production, comprising two sets of lifting platforms arranged opposite to each other, characterized in that: A multi-degree-of-freedom tooling mechanism is provided on one side of the lifting platform. The multi-degree-of-freedom tooling mechanism comprises a mounting frame (1), a lifting mechanism, a slewing mechanism, a rolling mechanism and a C-frame (2). The lifting mechanism comprises a lifting seat (3), the lifting seat (3) is slidably mounted on the mounting frame (1), and the lifting seat (3) has the freedom to move along the height direction of the mounting frame (1). The slewing mechanism comprises a slewing support (4), and the slewing support (4) is rotatably mounted on the lifting seat (3). The rolling mechanism comprises a rolling seat (5), and the rolling seat (5) is fixedly mounted on the slewing support (4). The C-frame (2) is rotatably mounted on the rolling seat (5). The C-frame (2) is used for tooling the engine. The rolling axis of the C-frame (2) and the slewing axis of the slewing support (4) are both horizontally arranged, and the rolling axis of the C-frame (2) is perpendicular to the slewing axis of the slewing support (4).

2. A multi-degree-of-freedom assembly device for engine production according to claim 1, characterized in that: The lifting mechanism also includes a ball screw (6) and a ball guide rail (7), wherein the ball screw (6) is vertically arranged and rotatably connected to the mounting frame (1), the lifting seat (3) is threadedly mounted on the ball screw (6), and the ball guide rail (7) is vertically fixed to the mounting frame (1), a slider (8) is fixed on the lifting seat (3), and the slider (8) is slidably adapted on the ball guide rail (7), and a brake servo motor (9) is installed on the mounting frame (1), and the output shaft of the brake servo motor (9) is transmission-connected to the input shaft of the worm gear reducer (10), and the output shaft of the worm gear reducer (10) is transmission-connected to the ball screw (6).

3. A multi-degree-of-freedom assembly device for engine production according to claim 2, characterized in that: The lifting mechanism further comprises a counterweight assembly, which is provided on both sides of the ball screw (6). The counterweight assembly comprises a chain (11), a counterweight block (12) and a sprocket (13). The sprocket (13) is rotatably mounted above the lifting seat (3). One end of the chain (11) is connected to the lifting seat (3), and the other end passes around the sprocket (13) and is connected to the counterweight block (12). A counterweight block roller (14) is rotatably mounted on the side wall of the counterweight block (12). A guide plate (15) is installed on the mounting frame (1), and the counterweight block roller (14) cooperates with the guide plate (15).

4. A multi-degree-of-freedom assembly device for engine production according to claim 3, characterized in that: The invention also includes a lifting pneumatic self-locking mechanism, which includes a self-locking seat (16), a first connecting rod (17), a second connecting rod (18) and a self-locking tooth (19). The self-locking seat (16) is fixed to the side wall of the lifting seat (3). A cylinder (21) is installed on the self-locking seat (16). The telescopic shaft of the cylinder (21) is connected to a first U-shaped block (22). A second U-shaped block (23) is fixed to the bottom of the self-locking seat (16). One end of the first connecting rod (17) is rotatably connected to the second U-shaped block (23), and the other end is connected to the self-locking tooth (19). One end of the second connecting rod (18) is rotatably connected to the first U-shaped block (22), and the other end is rotatably connected to the first connecting rod (17). A straight rack (20) is vertically installed on the mounting frame (1), and the self-locking tooth (19) engages with or separates from the straight rack (20) by deflection.

5. The multi-degree-of-freedom assembly device for engine production according to claim 4, characterized in that: A worm gear is mounted on the slewing support (4), a servo motor (24) is mounted on the lifting seat (3), the servo motor (14) is connected to a reducer (25), the reducer (24) is connected to a worm, and the worm engages with the worm gear.

6. The multi-degree-of-freedom assembly device for engine production according to claim 5, characterized in that: The rolling seat (5) is provided with a self-locking gear (26), and the lifting seat (3) is provided with a rotary pneumatic self-locking mechanism. The structure of the rotary pneumatic self-locking mechanism is the same as that of the lifting pneumatic self-locking mechanism. The self-locking teeth in the rotary pneumatic self-locking mechanism engage with or disengage from the self-locking gear (26) through deflection.

7. The multi-degree-of-freedom assembly device for engine production according to claim 1, characterized in that: An arc-shaped rack (27) is installed on the outer arc surface of the C-shaped frame (2); an opening is provided at one end of the rolling seat (5) close to the C-shaped frame (2); a main shaft (28) is rotatably installed in the opening of the rolling seat (5); a driving gear (29) is mounted on the main shaft (28); the driving gear (29) engages with the arc-shaped rack (27); a brake servo motor (30) is installed on the rolling seat (5); the brake servo motor (30) is connected to a rolling worm gear reducer, and the rolling worm gear reducer is connected to the main shaft (28).

8. The multi-degree-of-freedom assembly device for engine production according to claim 7, characterized in that: Arc-shaped ribs (31) are fixed on both sides of the C-shaped frame (2), and a plurality of limiting rollers (32) are rollingly matched on both sides of the arc-shaped ribs (31), and the limiting rollers (32) are rotatably mounted on the rolling seat (5). A universal ball bearing (33) is mounted on the rolling seat (5), and the universal ball of the universal ball bearing (33) contacts one end of the arc-shaped rib (31) away from the C-shaped frame (2).

9. The multi-degree-of-freedom assembly device for engine production according to claim 1, characterized in that: The C-shaped frame (2) is symmetrically provided with two sets of tooling components along its radial direction. The tooling components include two tooling frames (34). The two tooling frames (34) are respectively installed on both sides of the axial direction of the forming frame (2) by bolts. A C-shaped tooling frame (36) is provided above the tooling frame (34). The two ends of the opening of the C-shaped tooling frame (36) are respectively connected to the two tooling frames (34). Tooling sections (35) are fixed to the inner sides of the tooling frames (34) and the inner sides of the C-shaped tooling frames (36). Bolt holes are opened through the tooling sections (35).

10. The multi-degree-of-freedom assembly device for engine production according to claim 1, characterized in that: The lifting platform comprises a chassis (37), a hydraulic scissor mechanism (38), a top plate (39) and a telescopic plate (40), wherein the two ends of the hydraulic scissor mechanism (38) are respectively connected to the chassis (37) and the top plate (39), the telescopic plate (40) is slidably mounted on the top plate (39), a lifting ladder (41) is provided on the chassis (37), and an oil receiving chassis (42) is installed at the bottom of the mounting frame (1), and the oil receiving chassis (42) extends between the two groups of the lifting platforms.

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