A connection device for a rocket engine and an engine mount

Abstract

The utility model relates to a kind of connecting device for rocket engine and engine frame, including first connecting plate, second connecting plate, center block and four rotating blocks, first connecting plate and second connecting plate are located at the two sides of center block respectively, first connecting plate and second connecting plate are used to install rocket engine and engine frame respectively;Four rotating blocks are evenly limited rotation and installed on the side wall of center block along the circumference of center block;Any two opposite rotating blocks are connected with first connecting plate, and other two opposite rotating blocks are connected with second connecting plate;The device further includes at least two oppositely arranged assembly mechanisms, the two ends of assembly mechanism are respectively detachably connected with first connecting plate and second connecting plate.The utility model can make rocket engine and engine frame realize the relative swing of different angles, and then the injection angle of rocket engine can be adjusted, that is, the flight direction of rocket can be continuously and accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of rocket engine technology, and in particular to a connection device for connecting a rocket engine to an engine frame. Background Technology

[0002] During the process of sending a rocket into its intended space orbit, it is highly susceptible to interference from various factors such as atmospheric flow, minor thrust deviations, or shifts in the center of gravity caused by fuel consumption, which can disrupt the rocket's intended ascent trajectory. Therefore, to ensure that the rocket flies in the intended ascent trajectory, continuous and precise control of its ascent direction is essential.

[0003] The rocket engine is the "heart" of a rocket. It is usually mounted on an engine rack and provides enormous thrust to propel the rocket. Currently, the method for controlling the rocket's ascent and flight direction typically involves adjusting the rocket engine's ejection angle during ascent, thereby achieving continuous and precise control over the rocket's flight direction.

[0004] Therefore, there is an urgent need for a connection device between the rocket engine and the engine frame, so that the rocket engine can swing freely on the engine frame during the rocket's ascent, thereby adjusting the rocket engine's jet angle and thus continuously and precisely controlling the rocket's flight direction. Utility Model Content

[0005] The purpose of this invention is to provide a connection device for a rocket engine and an engine frame, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a connection device for a rocket engine and an engine frame, including a first connecting plate, a second connecting plate, a central block, and four rotating blocks, wherein: The first connecting plate and the second connecting plate are located on both sides of the central block, and the first connecting plate and the second connecting plate are used to install the rocket engine and the engine frame, respectively. The four rotating blocks are uniformly and rotatably mounted on the side wall of the central block along the circumference of the central block; any two opposite rotating blocks are connected to the first connecting plate, and the other two opposite rotating blocks are connected to the second connecting plate. The device further includes at least two opposing assembly mechanisms, the two ends of which are detachably connected to the first connecting plate and the second connecting plate, respectively, for adjusting and maintaining the parallelism and stability when the rocket engine and engine frame are respectively mounted on the first connecting plate and the second connecting plate.

[0007] According to one embodiment of the present invention, the first connecting plate and the second connecting plate are respectively provided with a plurality of first threaded holes and a plurality of second threaded holes, and the rocket engine and the engine frame are respectively bolted to the first connecting plate and the second connecting plate through the first threaded holes and the second threaded holes.

[0008] According to one embodiment of the present invention, the rotating block is provided with a rotating hole, and a side block is rotatably installed in the rotating hole. The end of the side block away from the rotating block is installed on the side wall of the center block, and the rotating block is rotatably installed on the side wall of the center block through the rotating hole and the side block.

[0009] According to one embodiment of the present invention, a bearing is provided in the rotating hole, the outer ring of the bearing is connected to the inner wall of the rotating hole, the inner ring of the bearing is connected to the outer wall of the side block, and the side block is rotatably connected to the rotating hole through the bearing.

[0010] According to one embodiment of the present invention, the assembly mechanism includes a support frame and an adjusting threaded rod. The adjusting threaded rod is threaded onto the support frame. The bottom end of the support frame is detachably connected to the first connecting plate, and the top end of the adjusting threaded rod is detachably connected to the second connecting plate. By adjusting the degree of screwing of the adjusting threaded rod onto the support frame, the parallelism and stability when the rocket engine and engine frame are respectively installed on the first connecting plate and the second connecting plate are adjusted and maintained.

[0011] According to one embodiment of the present invention, the external thread of the adjusting threaded rod is threaded with a fastening nut, which can abut against the support frame to fix the position of the adjusting threaded rod.

[0012] According to one embodiment of the present invention, a contact block is installed at the top end of the adjusting threaded rod, and the top end of the contact block is detachably connected to the second connecting plate. The top end of the adjusting threaded rod is detachably connected to the second connecting plate through the contact block.

[0013] According to one embodiment of the present invention, the adjusting threaded rod is provided with a plurality of adjusting planes evenly distributed along its circumference.

[0014] According to one embodiment of the present invention, a support column is installed at the bottom end of the support frame, and an mounting protrusion is installed at the bottom end of the support column. The support frame is detachably connected to the first connecting plate through the support column and the mounting protrusion.

[0015] According to one embodiment of the present invention, a plurality of second mounting bolts are installed on the first connecting plate, a plurality of first mounting bolts are installed on the second connecting plate, and the two rotating blocks connected to the first connecting plate are bolted to the first connecting plate through the second mounting bolts, and the two rotating blocks connected to the second connecting plate are bolted to the second connecting plate through the first mounting bolts.

[0016] Beneficial effects This utility model has at least the following technical effects: This invention, through the arrangement of a first connecting plate, a second connecting plate, a central block, and four rotating blocks, enables the relative swinging of the first connecting plate and the second connecting plate at different angles, that is, enables the relative swinging of the rocket engine and the engine frame at different angles, thereby enabling the adjustment of the rocket engine's injection angle and thus enabling continuous and precise control of the rocket's flight direction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A schematic diagram of the overall structure from another angle; Figure 4 for Figure 3 A schematic diagram of the overall structure from another angle; Figure 5 This is a schematic diagram of the overall structure of the side block and the center block in this utility model; Figure 6 This is a schematic diagram of the overall structure of the rotating block in this utility model; Figure 7 This is a schematic diagram of the overall structure of the rotating block and the central block after they are connected in this utility model; Figure 8 This is a schematic diagram of the overall structure of the support frame, support column, and mounting protrusion in this utility model; Figure 9 This is a schematic diagram of the overall structure of the adjusting threaded rod, adjusting plane, fastening nut and contact block in this utility model. Figure 10 This is a schematic diagram of the overall structure of the first connecting plate and the first pad in this utility model; Figure 11 This is a schematic diagram of the overall structure of the second connecting plate and the second pad in this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. First connecting plate; 2. Second connecting plate; 3. Center block; 4. Side block; 5. Rotating block; 6. Rotating hole; 7. Support frame; 8. Adjusting threaded hole; 9. Support column; 10. Mounting protrusion; 11. Adjusting threaded rod; 12. Adjusting plane; 13. Fastening nut; 14. Contact block; 15. First pad; 16. Second pad; 17. Mounting threaded hole; 18. First mounting bolt; 19. Second mounting bolt. Detailed Implementation

[0020] The features and exemplary embodiments of various aspects of this utility model will be described in detail below. To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this utility model and to exemplarily illustrate the principles of this utility model, and are not configured to limit this utility model. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or regions in the drawings may be enlarged for other structural components or regions to aid in the understanding of the embodiments of this utility model.

[0021] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this utility model. In the description of this utility model, it should be noted that, unless otherwise stated, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure or component that includes a list of elements includes not only those elements but also other structural elements that are not expressly listed or inherent to the structure or component. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes the element.

[0023] Spatial relation terms such as "below," "under," "under," "low," "above," "on," and "high" are used for descriptive convenience to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device, in addition to those different from those shown in the figure. Furthermore, phrases such as "one element on / below another element" can indicate that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first" and "second" are also used to describe individual elements, areas, parts, etc., without specifically indicating order or sequence, and should not be considered restrictive. Similar terms are used throughout the description to represent similar elements.

[0024] For those skilled in the art, this invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples.

[0025] In the following embodiments, there may be descriptions such as "this device". Those skilled in the art should understand that "this device" refers to a connection device for rocket engine and engine frame provided by this utility model.

[0026] like Figures 1-11 As shown, this utility model provides a connection device for a rocket engine and an engine frame. For example... Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, this device includes at least a first connecting plate 1, a second connecting plate 2, a central block 3, and four rotating blocks 5, wherein: The first connecting plate 1 and the second connecting plate 2 are located on both sides of the central block 3, respectively. The first connecting plate 1 and the second connecting plate 2 are used to install the rocket engine and the engine frame (neither of which are shown in the figure).

[0027] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figure 10 and Figure 11 As shown, the first connecting plate 1 and the second connecting plate 2 can be located at... Figure 1 The upper and lower sides of the central block 3. The first connecting plate 1 can be a circular structure, and the second connecting plate 2 can be an octagonal structure, without any particular limitation.

[0028] In this embodiment, both the rocket engine and the engine frame are existing technologies known in the art, and will not be described in detail here.

[0029] It should be understood that the rocket engine can be installed on the first connecting plate 1 or the second connecting plate 2. When the rocket engine is installed on the first connecting plate 1, the engine frame can be installed on the second connecting plate 2, and vice versa. No special limitation is made here.

[0030] Specifically, such as Figure 1 , Figure 3 , Figure 4 , Figure 10 and Figure 11 As shown, a plurality of first threaded holes and a plurality of second threaded holes are respectively provided on the first connecting plate 1 and the second connecting plate 2, and the rocket engine and the engine frame can be installed on the first connecting plate 1 and the second connecting plate 2 respectively through the first threaded holes and the second threaded holes in a bolt installation manner known in the art.

[0031] like Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, four rotating blocks 5 are uniformly and circumferentially mounted on the side wall of the central block 3, providing a limiting rotation. Specifically, as... Figure 1 and Figure 3 As shown, any two opposing rotating blocks 5 are connected to the first connecting plate 1, and the other two opposing rotating blocks 5 are connected to the second connecting plate 2. Specifically, such as Figure 5 , Figure 6 and Figure 7 As shown, a rotating hole 6 is provided on the rotating block 5. A side block 4 is rotatably installed inside the rotating hole 6. The end of the side block 4 away from the rotating block 5 is fixedly installed on the side wall of the center block 3. That is, the rotating block 5 can be rotatably installed on the side wall of the center block 3 through the rotating hole 6 and the side block 4.

[0032] In this embodiment, as Figure 6 As shown, the rotating hole 6 can be a circular structure, and no special limitation is made here.

[0033] In this embodiment, as Figure 5 As shown, since the side block 4 is rotatably mounted inside the rotating hole 6, the side block 4 can be a cylindrical structure, which is not particularly limited here. In this embodiment, there are four rotating blocks 5, and since the rotating blocks 5 can be rotatably mounted on the side wall of the center block 3 through the rotating hole 6 and the side block 4, the number of side blocks 4 is also four.

[0034] Furthermore, to improve the smoothness and stability of the limiting rotational connection between the rotating block 5 and the side block 4, in this embodiment, a bearing (not shown in the figure) is provided inside the rotating hole 6. The outer ring of the bearing and the inner wall of the rotating hole 6 can be connected to each other by a welding connection method known in the art, and the inner ring of the bearing and the outer wall of the side block 4 can be connected to each other by a welding connection method known in the art. That is, the side block 4 can be limited to a rotating connection with the rotating hole 6 via the bearing.

[0035] Preferably, the bearing described above can be a tapered roller bearing (not shown in the figure) known in the art, and is not particularly limited herein.

[0036] In this embodiment, the connection method between any two opposing rotating blocks 5 and the first connecting plate 1, and between the other two opposing rotating blocks 5 and the second connecting plate 2, is not particularly limited. For example, it can be configured as follows: like Figure 1 and Figure 3 As shown, a plurality of second mounting bolts 19 are installed on the first connecting plate 1, and a plurality of first mounting bolts 18 are installed on the second connecting plate 2. The two rotating blocks 5 connected to the first connecting plate 1 (i.e., any two opposing rotating blocks 5 mentioned above) can be bolted to the first connecting plate 1 through the second mounting bolts 19, and the two rotating blocks 5 connected to the second connecting plate 2 (i.e., the other two opposing rotating blocks 5 mentioned above) can be bolted to the second connecting plate 2 through the first mounting bolts 18.

[0037] In this embodiment, as Figure 6 As shown, the rotating block 5 can have two mounting threaded holes 17, and the mounting threaded holes 17 can be adapted to the first mounting bolt 18 and the second mounting bolt 19 at the same time and can be threaded together. Thus, any two opposite rotating blocks 5 can be connected to the first connecting plate 1 by the first mounting bolt 18, and the other two opposite rotating blocks 5 can be connected to the second connecting plate 2 by the second mounting bolt 19.

[0038] In this embodiment, since there are two mounting threaded holes 17 on each rotating block 5, there are four first mounting bolts 18 on the first connecting plate 1, and four second mounting bolts 19 on the second connecting plate 2.

[0039] Furthermore, in order to improve the connection stability between any two opposing rotating blocks 5 and the first connecting plate 1, and between the other two opposing rotating blocks 5 and the second connecting plate 2, in this embodiment, as follows: Figure 1 , Figure 3 , Figure 4 , Figure 10 and Figure 11 As shown, two first pads 15 are welded to the first connecting plate 1, and the two first pads 15 are respectively configured to correspond to two rotating blocks 5 connected to the first connecting plate 1 (i.e., any two opposing rotating blocks 5 mentioned above). Two second pads 16 are welded to the second connecting plate 2, and the two second pads 16 are respectively configured to correspond to two rotating blocks 5 connected to the second connecting plate 2 (i.e., the other two opposing rotating blocks 5 mentioned above).

[0040] In the above description, since all four rotating blocks 5 can rotate with the center block 3, and any two opposing rotating blocks 5 are connected to the first connecting plate 1, while the other two opposing rotating blocks 5 are connected to the second connecting plate 2, the first connecting plate 1 and the second connecting plate 2 can achieve relative oscillation at different angles through the rotating blocks 5 and the center block 3. Furthermore, since the rocket engine and engine frame are respectively mounted on the first connecting plate 1 and the second connecting plate 2, the rocket engine and engine frame can also achieve relative oscillation at different angles, thereby allowing adjustment of the rocket engine's ejection angle and enabling continuous and precise control of the rocket's flight direction.

[0041] According to one embodiment of the present invention, the device further includes at least two oppositely arranged assembly mechanisms, preferably two oppositely arranged assembly mechanisms. The two ends of the assembly mechanisms (i.e., Figure 1 The top and bottom ends of the middle section are respectively connected to the first connecting plate 1. Figure 1 The top of the middle and the second connecting plate 2 in Figure 1 The bottom end is detachably connected, which can be used to adjust and maintain the parallelism and stability when the rocket engine and engine frame are installed on the first connecting plate 1 and the second connecting plate 2, respectively.

[0042] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, the assembly mechanism includes at least a support frame 7 and an adjusting threaded rod 11, which is threaded onto the support frame 7. The bottom end of the support frame 7 (i.e., where the support frame 7 is located) Figure 1 The bottom end of the adjusting threaded rod 11 can be detachably connected to the first connecting plate 1, and the top end of the adjusting threaded rod 11 (i.e., the adjusting threaded rod 11 at the bottom end of the first connecting plate 1) can be detachably connected to the first connecting plate 1. Figure 1 The top of the plate can be detachably connected to the second connecting plate 2.

[0043] In this embodiment, since the adjusting threaded rod 11 and the support frame 7 are threaded together, the height position of the adjusting threaded rod 11 on the support frame 7 can be adjusted by adjusting the degree of screwing of the adjusting threaded rod 11 on the support frame 7. This allows for the adjustment and maintenance of the parallelism and stability when the rocket engine and engine frame are installed on the first connecting plate 1 and the second connecting plate 2, respectively.

[0044] In this embodiment, since each assembly mechanism has one support frame 7, and the number of assembly mechanisms is preferably two, the number of support frames 7 is also two, and the two support frames 7 are arranged opposite to each other.

[0045] In this embodiment, as Figure 8 As shown, the support frame 7 is provided with an adjustment threaded hole 8, and the adjustment threaded hole 8 is adapted to the adjustment threaded rod 11 and can be threadedly engaged with the adjustment threaded rod 11. That is, the adjustment threaded rod 11 can be threadedly engaged with the support frame 7 through the adjustment threaded hole 8.

[0046] In this embodiment, as Figure 8 As shown, each support frame 7 can have two adjusting threaded holes 8, therefore each support frame 7 can have two threaded adjusting threaded rods 11. In this embodiment, there are two support frames 7, therefore there are four adjusting threaded rods 11.

[0047] In this embodiment, the four adjusting threaded rods 11 can be evenly arranged along the circumferential direction of the central block 3.

[0048] Furthermore, in order to fix the position of the adjusting threaded rod 11 on the support frame 7, in this embodiment, a fastening nut 13 is threadedly engaged on the external thread of each adjusting threaded rod 11, and the fastening nut 13 is... Figure 1 The bottom end can be connected with the support frame 7. Figure 1 The top of the rod abuts against the support frame 7 to fix the position of the adjusting threaded rod 11.

[0049] In this embodiment, as Figure 1 , Figure 2 and Figure 9 As shown, a contact block 14 is installed at the top of the adjusting threaded rod 11, and the contact block 14 is in Figure 1 The top of the middle part can be connected to the second connecting plate 2. Figure 1 The bottom end of the middle is detachably connected, that is, the adjusting threaded rod 11 is in Figure 1 The top of the middle part can be connected to the second connecting plate 2 via contact block 14. Figure 1 The bottom end is detachably connected.

[0050] In this embodiment, as Figure 9As shown, the top of the contact block 14 can be provided with a top semi-groove adapted to the second connecting plate 2, and the second connecting plate 2 can be detachably installed in this top semi-groove, thereby realizing that the contact block 14 can... Figure 1 The top of the middle and the second connecting plate 2 are in Figure 1 The bottom end of the device is detachably connected. The connection between the contact block 14 and the top end of the adjusting threaded rod 11 can be made by bolt connection as is known in the art, and is not particularly limited here.

[0051] Furthermore, to facilitate the turning of the adjusting threaded rod 11, such as... Figure 2 and Figure 9 As shown, several adjusting planes 12 are evenly distributed along the circumference of the adjusting threaded rod 11.

[0052] Furthermore, in this embodiment, the number of adjustment planes 12 on each adjustment threaded rod 11 can be six, thereby allowing the adjustment threaded rod 11 to be turned using a hex wrench known in the art, without any particular limitation.

[0053] Furthermore, in order to improve the connection stability between the support frame 7 and the first connecting plate 1, in this embodiment, as follows: Figure 1 and Figure 8 As shown, in support frame 7 Figure 1 A support column 9 is installed at the bottom of the middle section. Figure 1 The bottom end of the support frame 7 is equipped with a mounting protrusion 10, which means that the support frame 7 can be detachably connected to the first connecting plate 1 via the support column 9 and the mounting protrusion 10.

[0054] In this embodiment, the support column 9 and the support frame 7, and the support column 9 and the mounting protrusion 10 can be connected by welding, a method known in the art, and are not particularly limited here.

[0055] In this embodiment, as Figure 8 As shown, each support frame 7 can have two support columns 9 installed, and both the support column 9 and the mounting protrusion 10 can be cylindrical structures, without any particular limitation.

[0056] In this embodiment, since there are two support frames 7, there will be four support columns 9 and four mounting protrusions 10.

[0057] Specifically, the first connecting plate 1 is in Figure 1 The top of the support frame 7 can be provided with grooves that correspond one-to-one with the four mounting protrusions 10 (for easy distinction, these are named mounting grooves), and the four mounting grooves are adapted to the four mounting protrusions 10 respectively. Thus, the mounting protrusions 10 can be installed in the mounting grooves, thereby realizing the detachable connection between the support frame 7 and the first connecting plate 1.

[0058] Furthermore, when the mounting protrusion 10 is installed in the mounting groove, the mounting groove and the mounting protrusion 10 can be in a state of slight interference fit (for example, the interference amount can be 0.01mm), which can further improve the connection stability between the support frame 7 and the first connecting plate 1.

[0059] Before this device can operate, the rocket engine and engine mount need to be installed on it. However, when installing the rocket engine and engine mount on the first connecting plate 1 and the second connecting plate 2 respectively, it is necessary to maintain the parallelism between the rocket engine and the engine mount to avoid deviation of the rocket's thrust line from its theoretical state. At the same time, it is also necessary to maintain the stability of the first connecting plate 1 and the second connecting plate 2 during the installation of the rocket engine and engine mount, so as to reduce the difficulty of installing the rocket engine and engine mount and thus improve the installation efficiency.

[0060] This device, through its assembly mechanism, maintains the parallelism and stability of the rocket engine and engine frame when installing them on the first connecting plate 1 and the second connecting plate 2. This prevents deviation of the rocket's thrust line from its theoretical state and improves installation efficiency. Specifically: For reference Figure 1 , Figure 1 This is a schematic diagram illustrating the assembly mechanism installed between the first connecting plate 1 and the second connecting plate 2. When it is necessary to adjust the parallelism between the rocket engine and the engine frame, the four adjusting threaded rods 11 can be slightly turned to adjust the parallelism of the first connecting plate 1 and the second connecting plate 2, bringing them to the required parallelism. Since the rocket engine and the engine frame are respectively mounted on the first connecting plate 1 and the second connecting plate 2, adjusting the parallelism of the first connecting plate 1 and the second connecting plate 2 is equivalent to adjusting the parallelism between the rocket engine and the engine frame, thereby preventing the rocket's thrust line from deviating from its theoretical state. After adjustment, the fastening nut 13 can be rotated to abut against the support frame 7, thus fixing the position of the adjusting threaded rods 11 and preventing them from loosening after adjustment, further maintaining the parallelism between the rocket engine and the engine frame.

[0061] Meanwhile, the adjusting threaded rod 11 can also effectively support the first connecting plate 1 and the second connecting plate 2, and help maintain the stability of the first connecting plate 1 and the second connecting plate 2 when installing the rocket engine and engine frame, thereby reducing the difficulty of installing the rocket engine and engine frame and improving the installation efficiency.

[0062] In this embodiment, all components within the device may be made of metal materials known in the art, and no particular limitation is made herein.

[0063] It should be understood that the above-described embodiments or examples of this utility model can be combined with each other and have corresponding technical effects.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A connection device for a rocket engine and an engine frame, characterized in that, It includes a first connecting plate (1), a second connecting plate (2), a center block (3), and four rotating blocks (5), wherein: The first connecting plate (1) and the second connecting plate (2) are located on both sides of the central block (3), and the first connecting plate (1) and the second connecting plate (2) are used to install the rocket engine and the engine frame, respectively; The four rotating blocks (5) are uniformly and rotatably mounted on the side wall of the center block (3) along the circumference of the center block (3); any two opposite rotating blocks (5) are connected to the first connecting plate (1), and the other two opposite rotating blocks (5) are connected to the second connecting plate (2). The device further includes at least two opposing assembly mechanisms, the two ends of which are detachably connected to the first connecting plate (1) and the second connecting plate (2) respectively, for adjusting and maintaining the parallelism and stability when the rocket engine and engine frame are installed on the first connecting plate (1) and the second connecting plate (2) respectively.

2. The connection device for connecting a rocket engine and an engine frame according to claim 1, characterized in that, The first connecting plate (1) and the second connecting plate (2) are respectively provided with a number of first threaded holes and a number of second threaded holes. The rocket engine and the engine frame are respectively bolted on the first connecting plate (1) and the second connecting plate (2) through the first threaded holes and the second threaded holes.

3. The connection device for connecting a rocket engine and an engine frame according to claim 1, characterized in that, The rotating block (5) has a rotating hole (6), and a side block (4) is rotatably installed in the rotating hole (6). The side block (4) is mounted on the side wall of the center block (3) at one end away from the rotating block (5). The rotating block (5) is rotatably installed on the side wall of the center block (3) through the rotating hole (6) and the side block (4).

4. The connection device for connecting a rocket engine and an engine frame according to claim 3, characterized in that, A bearing is provided inside the rotating hole (6). The outer ring of the bearing is connected to the inner wall of the rotating hole (6), and the inner ring of the bearing is connected to the outer wall of the side block (4). The side block (4) is rotatably connected to the rotating hole (6) through the bearing.

5. The connection device for connecting a rocket engine and an engine frame according to claim 1, characterized in that, The assembly mechanism includes a support frame (7) and an adjusting threaded rod (11). The adjusting threaded rod (11) is threaded onto the support frame (7). The bottom end of the support frame (7) is detachably connected to the first connecting plate (1), and the top end of the adjusting threaded rod (11) is detachably connected to the second connecting plate (2). By adjusting the degree of screwing of the adjusting threaded rod (11) onto the support frame (7), the parallelism and stability of the rocket engine and engine frame are adjusted and maintained when the rocket engine and engine frame are installed on the first connecting plate (1) and the second connecting plate (2), respectively.

6. The connection device for connecting a rocket engine and an engine frame according to claim 5, characterized in that, The external thread of the adjusting threaded rod (11) is fitted with a fastening nut (13), which can abut against the support frame (7) to fix the position of the adjusting threaded rod (11).

7. The connection device for connecting a rocket engine and an engine frame according to claim 5, characterized in that, The top end of the adjusting threaded rod (11) is equipped with a contact block (14), the top end of the contact block (14) is detachably connected to the second connecting plate (2), and the top end of the adjusting threaded rod (11) is detachably connected to the second connecting plate (2) through the contact block (14).

8. The connection device for connecting a rocket engine and an engine frame according to claim 5, characterized in that, The adjusting threaded rod (11) has several adjusting planes (12) evenly distributed along its circumference.

9. The connection device for connecting a rocket engine and an engine frame according to claim 5, characterized in that, The support frame (7) is equipped with a support column (9) at its bottom end, and a mounting protrusion (10) is installed at the bottom end of the support column (9). The support frame (7) is detachably connected to the first connecting plate (1) through the support column (9) and the mounting protrusion (10).

10. The connection device for connecting a rocket engine and an engine frame according to claim 1, characterized in that, The first connecting plate (1) is equipped with several second mounting bolts (19), and the second connecting plate (2) is equipped with several first mounting bolts (18). The two rotating blocks (5) connected to the first connecting plate (1) are bolted to the first connecting plate (1) through the second mounting bolts (19), and the two rotating blocks (5) connected to the second connecting plate (2) are bolted to the second connecting plate (2) through the first mounting bolts (18).

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