Multifunctional overturning assembly device for solid rocket engine

Abstract

The invention discloses a multifunctional overturning and assembling device for a solid rocket engine. The multifunctional overturning and assembling device comprises a support mechanism, an overturning mechanism, a rotary lifting mechanism and a trundle assembly. The trundle assembly is welded to the bottom of the support mechanism, the turnover mechanism is assembled on one side of the upper portion of the support mechanism, and the rotary lifting mechanism is assembled on one side of the upper portion of the support mechanism. The support mechanism is used for achieving installation and supporting of the turnover mechanism and the rotary lifting mechanism, the turnover mechanism is used for turnover operation of the engine assembly, and the rotary lifting mechanism is used for rotation, horizontal movement and vertical lifting of the engine assembly in the assembling process. The engine assembly assembling device is compact in structure and complete in function, the assembling requirements of circumferential rotation, horizontal movement, vertical lifting, overturning and the like of an engine assembly in all assembling procedures are completely met, and the intrinsic safety degree of the assembling process is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a multifunctional turnover assembly device for solid rocket engine, belonging to the technical field of solid rocket engine assembly. BACKGROUND

[0002] In recent years, with the continuous development of weapon systems, in order to realize the different functions of products, the structure of the engine is becoming more and more complex, and more and more requirements are put forward for the assembly technology. Compared with conventional engines, the number of parts of such structure products is large, the structure is complex, the product assembly process is tedious, and the assembly time is long. At the same time, the propellant burning rate of the product is also increasing, and the engine assembly is in a naked state of propellant, which needs to be rotated horizontally and vertically several times during assembly operation. The risk of assembly process increases, and the traditional assembly process needs to be manually turned over by the operator. The number of operators is large, the assembly efficiency is low, the safety risk of assembly process is high, and the intrinsic safety degree is low.

[0003] At present, there is no turnover assembly device research in the field of solid rocket engine assembly technology. Some people in the field of assembly technology have carried out turnover assembly technology research. Chinese patent CN107825092B provides a spacecraft turnover assembly device, which includes a support assembly and two turnover assemblies. The support assembly is used to fix and support the workpiece to be assembled, and the turnover assembly is used to adjust the assembly position, so that multi-position assembly can be realized. The device only has the function of turnover, the function is relatively single, and the device structure is complex through motor driving, which cannot meet the turnover assembly function demand of engine assembly. Chinese patent CN111546024B provides a turnover device for axle assembly, which includes a rack, a double-output motor, a screw rod, a sliding block, a turnover assembly, and a driving assembly. The device can make the axle rotate to any angle through the setting of a closed ring, so as to facilitate the installation of parts at any angle position of the axle. The device only has the function of turnover, the function is relatively single, and cannot meet the turnover assembly function demand of engine assembly. Chinese patent CN110395680A provides a turnover mechanism for gearbox assembly, which includes a rack, a turnover driving assembly, a tray assembly, and a turnover angle tracking mechanism. The mechanism can control the rotation angle according to the predetermined angle, and can realize turnover at any angle and multi-position. The mechanism only has the function of turnover, the function is relatively single, and cannot meet the turnover assembly function demand of engine assembly. SUMMARY

[0004] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide a multifunctional turnover assembly device for solid rocket engine, which is suitable for efficient and reliable turnover assembly of solid rocket engine assembly and can be used for turnover assembly of various regular similar products.

[0005] The technical solution of the present application is:

[0006] A multifunctional turnover assembly device for solid rocket engine, comprising a support mechanism, a turnover mechanism and a rotating lifting mechanism;

[0007] The support mechanism is a two-step structure, which provides installation interfaces and structural support for the turnover mechanism and the rotating lifting mechanism 30;

[0008] The turnover mechanism is installed on the second step of the support mechanism, and is used for turning over the engine assembly;

[0009] The rotating lifting mechanism is installed on the first step of the support mechanism, and is used for rotating, horizontally moving or vertically lifting the engine assembly.

[0010] Further, the turnover mechanism comprises a connecting bottom plate, a T-direction reducer, a connecting shaft, a hand wheel, an upper hoop assembly, a rotating support and a lower hoop assembly;

[0011] The T-direction reducer is fixed on the connecting bottom plate, and the connecting bottom plate is fixed on the second step of the support mechanism;

[0012] The hand wheel is connected with the input shaft of the T-direction reducer through the connecting shaft,

[0013] The rotating support is connected with the output shaft of the T-direction reducer;

[0014] The upper hoop assembly and the lower hoop assembly are installed on the upper and lower ends of the same side of the rotating support, and the axes of the upper hoop assembly and the lower hoop assembly are collinear, and are used for holding the engine assembly placed in the upper hoop assembly and the lower hoop assembly;

[0015] Turn the hand wheel, and drive the T-direction reducer to rotate the rotating support, drive the upper hoop assembly, the lower hoop assembly and the engine assembly to rotate, and realize the turnover operation of the engine assembly.

[0016] Further, the reduction ratio of the T-direction reducer is 1:40, which realizes the stop at any angle during rotation.

[0017] Further, the rotating lifting mechanism comprises a lifting module, a horizontal moving module and a circumferential rotating module;

[0018] The lifting module is fixed on the first step of the support mechanism;

[0019] The horizontal moving module is fixed on the lifting module, and is provided with a horizontal sliding rail, one side of the sliding rail being located below the turnover mechanism;

[0020] The circumferential rotating module is installed on the horizontal moving module, and the engine assembly is placed on the circumferential rotating module;

[0021] When the engine assembly is assembled, the circumferential rotation module rotates circumferentially to drive the engine assembly to rotate circumferentially; when the horizontal movement module moves horizontally, the circumferential rotation module and the engine assembly are driven to move horizontally; when the lifting module operates, the horizontal movement module, the circumferential rotation module and the engine assembly are driven to ascend or descend.

[0022] Further, the horizontal movement module comprises an upper connecting plate, a hand-operated guide rail assembly, a plurality of linear guide rail assemblies and guide rail pads;

[0023] The upper connecting plate is fixed on the lifting module;

[0024] Each guide rail pad is fixed on the upper connecting plate and arranged horizontally and in parallel;

[0025] The linear guide rail assembly comprises a guide rail and a slider located in the guide rail track, and the guide rail is fixed on the guide rail pad in one-to-one correspondence;

[0026] The hand-operated guide rail assembly comprises a guide rail, a hand wheel and a slider located in the guide rail track, and the guide rail is fixed on the upper connecting plate;

[0027] The bottom surface of the circumferential rotation module is connected with the sliders of the linear guide rail assemblies and the slider of the hand-operated guide rail assembly;

[0028] By shaking the hand wheel of the hand-operated guide rail assembly, the slider is driven to move, and then the circumferential rotation module and the engine assembly are driven to move horizontally.

[0029] Further, the circumferential rotation module comprises a guide rail connecting plate, a rotary disc bearing, a rotary disc connecting plate and a rotary support block;

[0030] The guide rail connecting plate is fixed on the horizontal movement module;

[0031] The rotary disc bearing is fixed on the guide rail connecting plate, and the rotary disc bearing can rotate circumferentially;

[0032] The rotary disc connecting plate is fixed on the rotary disc bearing, and the engine assembly is placed on the rotary disc connecting plate;

[0033] The rotary support block is fixed on the rotary disc connecting plate and used for fixing the engine assembly from the side.

[0034] Further, the circumferential rotation module is further provided with a latch, and the rotary support block is provided with a pin hole; the latch 317 is inserted into the pin hole of the rotary support block to limit the engine assembly.

[0035] Further, the circumferential rotation module is further provided with a spring limiting pin, which is arranged between the horizontal movement module and the guide rail connecting plate; the spring limiting pin is inserted to realize circumferential limiting of the rotary disc connecting plate and limit the rotary disc bearing and the upper assembly from rotating circumferentially.

[0036] Further, the lifting module comprises a lifting assembly, a lifting connecting plate, a hand wheel, a hand wheel shaft and a coupling;

[0037] The lifting connecting plate is fixed on the first layer step of the support mechanism;

[0038] The lifting assembly is connected between the upper surface of the lifting connecting plate and the lower surface of the horizontal moving module;

[0039] The hand wheel is connected with the input shaft of the lifting assembly through the hand wheel shaft and the coupling in sequence; rotating the hand wheel, the hand wheel drives the lifting assembly to perform the vertical lifting operation, and drives the horizontal moving module, the circumferential rotating module and the engine assembly to perform the vertical lifting action together.

[0040] A method for overturning assembly of a solid rocket engine, adopting a multifunctional overturning assembly device for the solid rocket engine, comprising:

[0041] The large end of the engine assembly is placed downward on the circumferential rotating module to perform assembly of the upper part components of the engine assembly;

[0042] After the assembly of the upper part components of the engine assembly is completed, the horizontal moving module moves the engine assembly to below the overturning mechanism; the lifting module adjusts the vertical position of the engine assembly until the engine assembly is cooperated with the overturning mechanism in place, and then the overturning mechanism tightly holds and fixes the engine assembly;

[0043] The lifting mechanism separates the engine assembly from the circumferential rotating module; the horizontal moving module moves the circumferential rotating module back to the initial position;

[0044] The overturning mechanism overturns the engine assembly, at this time, the small end of the engine assembly is downward and the large end is upward, the overturning is completed, and the assembly work of the engine in this station is completed.

[0045] Compared with the prior art, the present application has the following advantages:

[0046] (1) The device proposed in the present application has compact structure and complete functions, and completely meets the assembly requirements of the engine assembly in each assembly process, such as circumferential rotation, horizontal movement, vertical lifting and overturning, etc., and changes the traditional manual operation mode through mechanization, and the intrinsic safety degree of the assembly process is effectively improved.

[0047] (2) The overall connection mode of the device proposed in the present application is simple, and the overturning assembly of engine assemblies of different sizes can be quickly adapted through replacement of the upper and lower clamp assemblies, the movable baffle and the rotating support block, etc., and the device has good universality and wide application range.

[0048] (3) The device is controlled by the hand wheel, and the personnel can operate conveniently, the number of operating personnel is reduced from 3 to 1 after the device is applied, the production cost is effectively reduced, and the assembly efficiency is effectively improved, and the assembly efficiency is improved by more than 100%.

[0049] (4) The device is designed and developed by fully considering the safety risk in the assembly process, the lifting precision control is performed, the self-locking speed reducer is selected, the upper and lower hoop assembly is designed to be tightly fixed, the spring limiting pin, the bolt and other moving limiting mechanisms are arranged to ensure the safety and controllability of the assembly process, and the essential safety degree of the assembly process is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0050] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, like reference numerals designate like parts throughout the several views in the drawings. In the drawings:

[0051] Figure 1 It is a three-dimensional schematic view of the solid rocket engine multifunctional turnover assembly device of the embodiment of the application;

[0052] Figure 2 It is a three-dimensional schematic view of the support mechanism of the embodiment of the application;

[0053] Figure 3 It is a three-dimensional schematic view of the turnover mechanism of the embodiment of the application;

[0054] Figure 4 It is a shaft side view of the rotary lifting mechanism of the embodiment of the application;

[0055] Figure 5 It is a front view of the rotary lifting mechanism of the embodiment of the application;

[0056] Figure 6 It is a schematic view of the rotary lifting mechanism of the embodiment of the application;

[0057] Figure 7 It is a schematic view of the rotary lifting mechanism of the embodiment of the application;

[0058] Figure 8 It is a schematic view of the assembly process engine assembly and rotary lifting mechanism of the embodiment of the application;

[0059] Figure 9 It is a schematic view of the assembly process engine assembly and rotary lifting mechanism of the embodiment of the application. DETAILED DESCRIPTION

[0060] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be thoroughly understood and fully conveyed to those skilled in the art.

[0061] The present application provides a multifunctional turnover assembly device for solid rocket engine, as shown in the figure, comprising a support mechanism 10, a turnover mechanism 20, a rotary lifting mechanism 30 and a set of casters 40. Four sets of caster assemblies 40 are welded at the bottom of the support mechanism 10, the turnover mechanism 20 is bolted on one side of the upper part of the support mechanism 10, and the rotary lifting mechanism 30 is bolted on one side of the upper part of the support mechanism 10. In use, the support mechanism 10 is used to realize the installation and support of the turnover mechanism 20 and the rotary lifting mechanism 30, the turnover mechanism 20 is used for engine assembly turnover operation, and the rotary lifting mechanism 30 is used for engine assembly rotation, horizontal movement and vertical lifting during assembly process. Figure 1

[0062] The support mechanism 10 mainly provides installation interface and structural support for the turnover mechanism 20 and the rotary lifting mechanism 30 in the multifunctional turnover assembly device for solid rocket engine. As shown in the figure, the support mechanism 10 is composed of different specifications of rectangular steel 101 and reinforcing rib plate 102 according to the specified size, forming the whole support mechanism 10. According to the structure needs, part of the rectangular steel 101 is processed with through hole on the upper part of the rectangular steel, which is used for the installation of the turnover mechanism 20 and the rotary lifting mechanism 30. Two through holes are processed on both sides of the bottom of the two rectangular steels of the rectangular steel 101, which are used for reliable fixing connection between the whole device and the foundation bolt in the factory building when the universal casters are not installed. The bottom of the support mechanism 10 is welded with the connecting plate of the four sets of caster assemblies 40, realizing the arbitrary direction movement of the turnover assembly device, and facilitating the movement and position fixing of the whole device. Figure 2 The turnover mechanism 20 is mainly used to hold and fix the engine assembly, then realize the turnover of the engine assembly by rotating the hand wheel, and can stop at any position during the turnover process, replacing manual turnover, improving the assembly efficiency and intrinsic safety. The turnover mechanism 20 is as shown in the figure.

[0063] Figure 3 ​​As shown, mainly by connecting the base plate 201, T reducer 202, connecting shaft 203, hand wheel 204, connecting screw 205, upper hoop assembly 206, rotating support 207, lower hoop assembly 208, locking screw 209, bolt 210. T reducer 202 is connected and fixed with connecting base plate 201 through bolt 210, hand wheel 204 is connected with T reducer 202 input shaft side through connecting shaft 203, rotating support 207 is connected with T reducer 202 output shaft side through locking screw 209, upper hoop assembly 206 and lower hoop assembly 208 are installed on both sides of rotating support 207 through 4 groups of connecting screw 205, connecting base plate 201 is installed on the upper side of support mechanism 10 through bolt. By rotating hand wheel 204 to drive T reducer 202 to act, rotating support 207 can be rotated circumferentially, and then upper hoop assembly 206, lower hoop assembly 208 and engine assembly 50 are rotated circumferentially. By replacing upper hoop assembly 206 and lower hoop assembly 208, the overturning assembly of engine assemblies of different sizes can be realized, which has good versatility. The reduction ratio of T reducer 202 is selected as 1:40, which can realize stopping at any angle during rotation and has a safe self-locking function after stopping, ensuring the safety and controllability of rotation. The inner side of the upper hoop assembly 206 is designed with a convex structure, which can cooperate with the tool groove of the engine assembly 50, so that the engine assembly 50 can be prevented from slipping accidentally during circumferential rotation, and the process safety is improved. The connecting hole of rotating support 207 is designed as a waist-shaped hole, which is convenient for position adjustment of the upper hoop assembly 206 and the lower hoop assembly 208 during installation. At the same time, it is convenient to realize the assembly of engine assembly products of different structures and sizes, so as to realize the versatility requirement of multi-specification products.

[0064] The rotating lifting mechanism 30 is mainly used to realize the circumferential rotation, horizontal movement and vertical lifting function of the engine assembly 50 during the overturning assembly process. The circumferential rotation function is used to meet the 360° circumferential rotation requirement of the assembly process of the components in the engine assembly 50, and improve the assembly efficiency; the horizontal movement function is used to realize the translation of the components in the engine assembly 50 to the hoop assembly position in the overturning mechanism 20 after assembly, and move the rotating lifting mechanism 30 back to the initial position after the engine assembly 50 is fixed by the hoop; the vertical lifting function is used to adjust the vertical direction when the engine assembly 50 is assembled and fixed with the upper and lower hoop assemblies in the overturning mechanism 20, which is convenient for precise assembly and connection, and the height of the rotating lifting mechanism 30 is lowered after the engine assembly 50 is fixed by the hoop, which is convenient for overturning operation of the overturning mechanism 20. Figure 4 、 Figure 5 The three-dimensional schematic diagram of the rotating lifting mechanism of the embodiment of the application is shown.

[0065] As Figure 4 、 5As shown, the rotary lifting mechanism 30 includes a rotating disc connecting plate 301, a linear guide rail assembly 302, a hand-operated guide rail assembly 303, a linear guide column assembly 304, a lifting machine connecting plate 305, a lifting machine assembly 306, a guide rail connecting plate 307, a movable baffle 308, an upper connecting plate 309, a hand wheel 310, a hand wheel shaft 311, a coupling 312, a rotary support block 313, a rotating disc bearing 314, a guide rail cushion block 315, a spring limiting pin 316, and a plug 317. Among them:

[0066] The guide rail cushion block 315 is fixed on the upper part of the upper connecting plate 309 by screws, the hand-operated guide rail assembly 303 is fixed on the upper part of the upper connecting plate 309 by screws, and the linear guide rail assembly 302 is fixed above the guide rail cushion block 315 by screws. The guide rail cushion block serves to ensure that the horizontal plane height of the linear guide rail slider and the horizontal plane height of the hand-operated guide rail slider are consistent, thereby ensuring the assembly of the guide rail connecting plate 307.

[0067] The guide rail connecting plate 307 is fixed above the slider of the hand-operated guide rail assembly 303 and the slider of the linear guide rail assembly 302 by screws. The hand-operated guide rail assembly 303 is a ball screw slider mechanism, which can move the slider in the assembly in the horizontal direction by rotating the hand wheel, thereby driving the guide rail connecting plate 307 and the assembly above it to move in the horizontal direction. The linear guide rail assembly 302 is used to support the guide rail connecting plate 307 and can slide horizontally when the guide rail connecting plate 307 moves horizontally.

[0068] The rotating disc bearing 314 is fixed above the guide rail connecting plate 307 by screws, the rotating disc connecting plate 301 is fixed above the rotating disc bearing 314 by screws, the rotary support block 313 is fixed above the rotating disc connecting plate 301 by screws, and the movable baffle 308 is fixed on the upper part of the rotary support block 313 by screws.

[0069] The plug 317 is placed in the pin hole above the rotary support block 313. The plug 317 is set as a movable mechanism and can be placed as needed during assembly. When the plug 317 is placed in the pin hole above the rotary support block 313, the limiting function is realized. For example, Figure 6 As shown, after placing the plug 317, the engine assembly 50 tool bottom Figure 6 indicated by the dashed line) cannot move horizontally and laterally, ensuring that the engine assembly 50 will not slide out during the circumferential rotation process, thereby improving safety. Removing the plug 317 cancels the limiting function, ensuring that the rotary lifting mechanism 30 can move horizontally and be separated from the engine assembly 50 during subsequent operations.

[0070] The spring limiting pin 316 is placed in the through hole between the rotating disc connecting plate 301 and the guide rail connecting plate 307, as shown in Figure 7As shown, the circumferential limiting of the rotating disc connecting plate 301 can be realized by inserting the spring limiting pin 316, the rotating disc bearing 314 and the upper assembly are limited to circumferential rotation, the effective control of circumferential rotation is realized, and the operability of the lifting device is improved. The elevator assembly 306 and the linear guide column assembly 304 are connected between the elevator connecting plate 305 and the upper connecting plate 309 through screws, the linear guide column assembly 304 can ensure the controllable precision of the lifting process, avoid the shaking of the product and the mechanism during the lifting process, and ensure the safety and controllability of the lifting process. The hand wheel 310 is connected with the input shaft of the elevator assembly 306 through the hand wheel shaft 311 and the coupling 312. The rotating disc bearing 314 can rotate circumferentially by 360°, which meets the circumferential rotation assembly requirement and improves the assembly efficiency. By shaking the hand wheel to drive the hand wheel guide rail assembly 303 to move horizontally, the guide rail connecting plate 307, the linear guide rail assembly 302 and the upper assembly are driven to move horizontally together, and the horizontal movement function is realized. The specified specification hand wheel guide rail assembly 303 can realize the limiting of the horizontal movement position, avoiding the safety risk of excessive movement. By rotating the hand wheel 310, the elevator assembly 306 can be driven to perform vertical lifting operation, driving the upper connecting plate 309 and the upper assembly to perform vertical lifting action together, and realizing the lifting function. By replacing the movable baffle 308 and the rotating support block 313, the device can be applied to the assembly of engine assemblies of different sizes, and has good universality.

[0071] The caster assembly 40 mainly includes a connecting plate and a locking universal caster. The connecting plate is welded at the bottom of the support mechanism 10, and the locking universal caster is assembled below the connecting plate through screws, so that the turnover assembly device can move in any direction, and the overall movement and position fixing of the device are facilitated. The locking universal caster is a detachable structure, and after being removed, the overall bottom of the device is reliably fixed and connected with the foundation bolts in the factory building.

[0072] The method for using the rocket engine turnover assembly device of the application is as follows:

[0073] Before the engine assembly 50 is vertically turned over, the upper part component assembly thereof needs to be assembled, such as Figure 8 As shown, first, the large end of the engine assembly 50 is placed downward above the rotating support block 313, then the pin 317 is placed in the pin hole of the rotating support block 313 to limit the engine assembly 50, so as to ensure safety and reliability during rotation and facilitate operation; then, the engine assembly 50 component assembly is assembled, and the circumferential rotation and circumferential limiting of the engine assembly 50 are controlled by inserting and pulling the spring limiting pin 316 during the assembly process; after the engine assembly 50 component assembly is completed, the hand wheel of the hand wheel guide rail assembly 303 is rotated to slowly move the engine assembly 50 to below the clamp assembly of the turnover mechanism 20;

[0074] Next, the vertical position of the engine assembly 50 is adjusted by rotating the hand wheel 310 until the tooling flange of the engine assembly 50 is matched with the inner protruding structure of the upper hoop assembly 206, and then the upper hoop assembly 206 and the lower hoop assembly 208 are tightly fixed above the engine assembly 50 tooling; the latch 317 is removed, and then the engine assembly 50 is separated from the rotating support block 313 by rotating the hand wheel 310, and then the rotating lifting mechanism 30 is moved back to the initial position by rotating the hand wheel in the hand wheel guide rail assembly 303; then the height of the rotating support block 313 is lowered by rotating the hand wheel 310, which is convenient for subsequent overturning operation;

[0075] Next, the engine assembly 50 is overturned by rotating the hand wheel 204, and the overturned position is as shown in FIG. 6, wherein the small end of the engine assembly is at the bottom and the large end is at the top, and the overturning is completed. Figure 9

[0076] Finally, the engine assembly 50 is transferred to the next station by the balance crane.

[0077] The application has been applied in batch production of the same type, and the operability and effectiveness of the overturning assembly have been verified. The number of process operators is reduced from 3 to 1, the cost is effectively reduced, and the assembly efficiency is effectively improved. The assembly efficiency is improved by more than 100%. Through mechanization instead of manual operation, the intrinsic safety of the assembly process is effectively improved. The engine assembled by the assembly device of the application passes the test of multiple tests and meets the design requirements. The overall connection mode of the device is simple, and the overturning assembly of engine assemblies of different sizes can be quickly adapted by replacing part of the movable parts, which has good universality and wide application range.

[0078] The above examples are only preferred specific embodiments of the application, and the usual changes and replacements made by those skilled in the art within the scope of the technical solutions of the application should be included in the protection scope of the application.​

Claims

1. A multi-functional roll-over assembly device for a solid rocket engine, characterized by, The device comprises a support mechanism (10), a turnover mechanism (20) and a rotary lifting mechanism (30); The support mechanism (10) is a two-layer stepped structure, which provides installation interfaces and structural support for the turnover mechanism (20) and the rotary lifting mechanism (30); The turnover mechanism (20) is installed on the second layer of the support mechanism (10) and is used for turning over the engine assembly (50); The rotary lifting mechanism (30) is installed on the first layer of the support mechanism (10) and is used for rotating, horizontally moving or vertically lifting the engine assembly (50).

2. The multi-functional roll-over assembly of a solid rocket engine according to claim 1, wherein The turnover mechanism (20) comprises a connecting bottom plate (201), a T-shaped reducer (202), a connecting shaft (203), a hand wheel (204), an upper clamp assembly (206), a rotating support (207) and a lower clamp assembly (208); The T-shaped reducer (202) is fixed on the connecting bottom plate (201), and the connecting bottom plate (201) is fixed on the second layer of the support mechanism (10); The hand wheel (204) is connected with the input shaft of the T-shaped reducer (202) through the connecting shaft (203), The rotating support (207) is connected with the output shaft of the T-shaped reducer (202); The upper clamp assembly (206) and the lower clamp assembly (208) are installed on the upper and lower ends of the same side of the rotating support (207), and the axes of the upper clamp assembly (206) and the lower clamp assembly (208) are collinear, which are used for clamping the engine assembly placed in the upper clamp assembly (206) and the lower clamp assembly (208); The hand wheel (204) drives the T-shaped reducer (202) to rotate, and the rotating support (207) rotates circumferentially, driving the upper clamp assembly (206), the lower clamp assembly (208) and the engine assembly (50) to rotate circumferentially, thereby realizing the turnover operation of the engine assembly (50).

3. The multi-functional roll-over assembly of a solid rocket engine of claim 1, wherein, The reduction ratio of the T-shaped reducer (202) is 1:40, which realizes the stop at any angle during rotation.

4. The multi-functional roll-over assembly of a solid rocket engine of claim 1, wherein, The rotary lifting mechanism (30) comprises a lifting module, a horizontal moving module and a circumferential rotating module; The lifting module is fixed on the first layer of the support mechanism (10); The horizontal moving module is fixed on the lifting module and is provided with horizontal sliding rails, one side of the sliding rails being located below the turnover mechanism (20); The circumferential rotating module is installed on the horizontal moving module, and the engine assembly (50) is placed on the circumferential rotating module; When the engine assembly (50) is assembled, the circumferential rotating module rotates circumferentially, driving the engine assembly (50) to rotate circumferentially; the horizontal moving module moves horizontally, driving the circumferential rotating module and the engine assembly (50) to move horizontally; and the lifting module lifts, driving the horizontal moving module, the circumferential rotating module and the engine assembly (50) to ascend or descend, so that the engine assembly (50) is fixed on the turnover mechanism (20).

5. A multi-functional roll-over assembly for a solid rocket engine as defined in claim 4, wherein The horizontal moving module comprises an upper connecting plate (309), a hand wheel guide rail assembly (303), a plurality of straight guide rail assemblies (302) and guide rail pads (315); The upper connecting plate (309) is fixed on the lifting module; The guide rail pads (315) are fixed on the upper connecting plate (309) and are horizontally and parallelly arranged; The linear guide rail assembly (302) comprises guide rails and sliders in the guide rail tracks, and the guide rails are fixed on the guide rail pads one by one in a one-to-one correspondence; The hand-operated guide rail assembly (303) comprises guide rails, a hand wheel and sliders in the guide rail tracks, and the guide rails are fixed on the upper connecting plate (309); The bottom surface of the circumferential rotation module is connected with the sliders of the linear guide rail assemblies (302) and the sliders of the hand-operated guide rail assembly (303); By shaking the hand wheel of the hand-operated guide rail assembly (303), the slider is moved, and then the circumferential rotation module and the engine assembly are horizontally moved.

6. A multi-functional roll-over assembly for a solid rocket engine as defined in claim 4, wherein The circumferential rotation module comprises a guide rail connecting plate (307), a rotating disc bearing (314), a rotating disc connecting plate (301) and a rotating support block (313); The guide rail connecting plate (307) is fixed on the horizontal movement module; The rotating disc bearing (314) is fixed on the guide rail connecting plate (307), and the rotating disc bearing (314) can rotate circumferentially; The rotating disc connecting plate (301) is fixed on the rotating disc bearing (314), and the engine assembly is placed on the rotating disc connecting plate (301); The rotating support block (313) is fixed on the rotating disc connecting plate (301) and is used for fixing the engine assembly (50) from the side.

7. A multi-functional roll-over assembly for a solid rocket engine as defined in claim 6, wherein The circumferential rotation module is further provided with a latch (317), and the rotating support block (313) is provided with a pin hole; the latch (317) is inserted into the pin hole of the rotating support block (313) to limit the engine assembly (50).

8. A multi-functional roll-over assembly for a solid rocket engine as recited in claim 7, wherein, The circumferential rotation module is further provided with a spring limiting pin (316) arranged between the horizontal movement module and the guide rail connecting plate (307); the spring limiting pin (316) is inserted to realize circumferential limiting of the rotating disc connecting plate (301) and limit circumferential rotation of the rotating disc bearing (314) and the assembly above.

9. The multi-functional roll-over assembly of a solid rocket engine of claim 4, wherein, The lifting module comprises an elevator assembly (306), an elevator connecting plate (305), a hand wheel (310), a hand wheel shaft (311) and a shaft coupling (312); The elevator connecting plate (305) is fixed on the first layer step of the support mechanism (10); The elevator assembly (306) is connected between the upper surface of the elevator connecting plate (305) and the lower surface of the horizontal movement module; The hand wheel (310) is connected with the input shaft of the elevator assembly (306) through the hand wheel shaft (311), the shaft coupling (312) and the elevator assembly (306) in sequence; rotating the hand wheel (310) drives the elevator assembly (306) to perform vertical lifting operation, and drives the horizontal movement module, the circumferential rotation module and the engine assembly (50) to perform vertical lifting action together.

10. A method of flip assembly of a solid rocket engine using a multi-functional flip assembly device of a solid rocket engine as claimed in claim 4, wherein, The method comprises the following steps: placing the large end of the engine assembly (50) downward on the circumferential rotation module to assemble the upper part of the engine assembly (50); After the assembly of the engine assembly (50) is completed, the horizontal movement module moves the engine assembly (50) to the position below the turnover mechanism (20); the lifting module adjusts the vertical position of the engine assembly (50) until the engine assembly (50) is matched with the turnover mechanism (20), and then the turnover mechanism (20) tightly holds the engine assembly (50); The lifting mechanism separates the engine assembly (50) from the circumferential rotation module; the horizontal movement module moves the circumferential rotation module back to the initial position; The turnover mechanism (20) turns over the engine assembly (50), and at this time, the small end of the engine assembly (50) is at the lower end, and the large end is at the upper end, the turnover is completed, and the assembly of the engine in this station is completed.

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