Engine protection mechanism

Abstract

The invention relates to the technical field of spacecraft engine protection, in particular to an engine protection mechanism which comprises an engine support, a protection tool and a connecting piece, an engine is installed on the engine support, the protection tool is arranged on the engine in a sleeving mode and connected with the engine support, and the engine is connected with the engine support through the connecting piece. According to the technical scheme, one part of the engine is located in the engine support, the other part of the engine is completely wrapped by the protection tool, then the purpose of protecting the engine is achieved, and the engine support and the protection tool are both made of high-rigidity materials such as metal materials, so that the engine is protected. Even if the protection mechanism collides with an external hard object, the engine can still be effectively protected, and mechanical damage to the engine is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of spacecraft engine protection, and in particular to an engine protection mechanism. Background Art

[0002] During the development, transportation and storage of spacecraft engines, the engines are often faced with the risk of mechanical damage due to human operating errors, accidental equipment collisions or environmental vibrations. Although this type of non-operating damage does not involve extreme working environments such as high temperature and high pressure, it may cause permanent deformation or performance degradation of precision components, seriously affecting the subsequent testing and reliability of the engine.

[0003] At present, the non-operating protection of spacecraft engines mainly adopts passive protection methods such as traditional polymer foam material filling. This kind of method has obvious limitations in the application of aerospace field, that is, the protective effect of traditional polymer foam materials is limited. When they collide with harder objects, polymer foam materials cannot provide good protection, which leads to mechanical damage to the engine.

[0004] Therefore, how to provide a protective mechanism that has strong rigidity, is easy to disassemble and install, and has a firm connection becomes a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The invention provides an engine protection mechanism, which is used to solve the problem of how to provide a protection mechanism with strong rigidity, convenient disassembly and installation, and firm connection.

[0006] The present invention provides an engine protection mechanism, comprising: an engine bracket, on which the engine is mounted; The protective tooling is mounted on the engine and connected to the engine bracket; A connecting piece, through which the engine is connected to the engine bracket.

[0007] In some of these embodiments, the engine mount includes: Arc bracket A; The transverse support rods are provided in multiple groups, and one end of the transverse support rods is connected to the arc-shaped support A; Arc-shaped bracket B, the other end of the transverse support rod is connected to the arc-shaped bracket B; A conical bracket A, one end of which is connected to the arc bracket A, and the other end of which is connected to the arc bracket B; A conical bracket B, one end of which is connected to the arc bracket A, and the other end of which is connected to the arc bracket B; A connecting frame, one end of which is connected to the conical support A, and the other end of which is connected to the conical support B; The conical bracket C is mounted on the arc bracket A; A longitudinal support rod is mounted on the arc-shaped bracket A; The mounting plate is installed on the conical bracket A, the conical bracket B, the connecting frame, the conical bracket C and the longitudinal support rod.

[0008] In some of the embodiments, there are multiple groups of longitudinal support rods, which are symmetrically distributed at both ends of the arc-shaped bracket A.

[0009] In some of the embodiments, the protective gear includes: A protective cover, which is mounted on the engine; A U-shaped connector, one end of which is connected to one end of the protective sleeve, and the other end of which is connected to the arc-shaped bracket B; A protective cap is rotatably connected to the other end of the protective sleeve; The convex block is fixedly mounted on the protective sleeve, an L-shaped through slot is provided on one side of the protective cap close to the protective sleeve, and the convex block is slidably connected inside the L-shaped through slot.

[0010] In some of the embodiments, a threaded hole is formed at one end of the U-shaped connector away from the protective sleeve, and the U-shaped connector is connected to the arc-shaped bracket B by bolts.

[0011] In some of the embodiments, the connector includes: Connecting rod A, connected to the engine; A semicircular fixing plate A is installed inside the connecting rod A, and a sliding groove A is provided on the semicircular fixing plate A; Rotating block A, rotatably connected to the semicircular fixed plate A; A swing rod A, one end of which is connected to the rotating block A, and the other end of which extends to the outside of the connecting rod A, and the swing rod A is slidably connected to the slide groove A; A connecting rod B is connected to the arc-shaped bracket B; A semicircular fixing plate B is installed inside the connecting rod B, and a sliding groove B is provided on the semicircular fixing plate B; Rotating block B, rotatably connected to the semicircular fixed plate B; One end of the swing rod B is connected to the rotating block B, and the other end extends to the outside of the connecting rod B. The swing rod B is slidably connected to the sliding groove B.

[0012] In some of the embodiments, a swing rod locking mechanism is installed on the connecting rod A for locking the swing rod A.

[0013] In some of the embodiments, the locking mechanism includes: The locking block is mounted on the connecting rod A, and a swing rod sliding groove is provided on the locking block, and the swing rod A is slidably connected to the locking block through the swing rod sliding groove; A slide rod, slidably connected to the interior of the locking block; A fixing plate, mounted on one end of the slide bar; A fixing plate locking member, installed inside the locking block, for clamping the fixing plate; a threaded rod, one end of which is connected to the other end of the slide rod; The limiting plate is installed on the locking block, and the other end of the threaded rod passes through the limiting plate and is rotatably connected with the limiting plate.

[0014] In some embodiments, the fixing plate locking member includes: Arc splint A; The arc-shaped clamping plate B is rotatably connected with the arc-shaped clamping plate A, and the arc-shaped clamping plate A and the arc-shaped clamping plate B are both arranged inside the locking block; Spring A, one end of which is connected to the inner wall of the locking block, and the other end of which is connected to the arc-shaped clamping plate A; One end of the spring B is connected to the inner wall of the locking block, and the other end is connected to the arc clamping plate B.

[0015] In some of the embodiments, one end of the sliding rod away from the threaded rod passes through the swing rod sliding slot and is slidably connected to the locking block.

[0016] The beneficial effects of the present invention are as follows: an engine protection mechanism of the present invention is provided with an engine bracket composed of multiple conical structures, and a part of the engine is located inside the engine bracket to protect it. At the same time, for the part of the engine located outside the engine bracket, a protective sleeve and a protective cap are provided in the present invention. The protective sleeve is connected to the arc bracket B by bolts, and the protective cap is rotatably connected to the protective sleeve through a protrusion and an L-shaped through groove, so as to achieve the effect of easy disassembly. In the technical solution of the present invention, the engine is completely wrapped by the engine bracket, the protective sleeve and the protective cap to avoid damage to it by external factors. The overall engine bracket, protective sleeve and protective cap of the present invention are all components with high rigidity. Therefore, when colliding with a hard object, the engine can be effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an engine protection mechanism of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of an engine bracket in an engine protection mechanism shown; Figure 3 yes Figure 1 A schematic diagram of the structure of a protective tooling in an engine protection mechanism is shown; Figure 4 yes Figure 1 A schematic diagram of the structure of a protective sleeve in an engine protection mechanism shown; Figure 5 yes Figure 1 A schematic diagram of the structure of a protective cap in an engine protection mechanism shown; Figure 6 yes Figure 1 A schematic diagram of the structure of a connecting member in an engine protection mechanism in an unconnected state; Figure 7 yes Figure 1 A schematic structural diagram of a connecting member in an engine protection mechanism in a connected state is shown; Figure 8 yes Figure 1 A structural schematic diagram of a locking mechanism in an engine protection mechanism is shown.

[0018] In the attached drawings, 1, engine bracket; 11, arc bracket A; 12, transverse support rod; 13, arc bracket B; 14, conical bracket A; 15, conical bracket B; 16, connecting frame; 17, conical bracket C; 18, longitudinal support rod; 19, mounting plate; 2, engine; 3, protective tooling; 31, protective cover; 32, U-shaped connector; 321, threaded hole; 33, protective cap; 34, bump; 4, connector; 41, connecting rod A; 42, semicircular fixing plate A ; 43. Slide groove A; 44. Rotating block A; 45. Swing rod A; 46. Connecting rod B; 47. Semicircular fixed plate B; 48. Slide groove B; 49. Rotating block B; 410. Swing rod B; 5. Locking mechanism; 51. Locking block; 52. Swing rod sliding groove; 53. Sliding rod; 54. Fixed plate; 55. Fixed plate locking piece; 551. Arc splint A; 552. Arc splint B; 553. Spring A; 554. Spring B; 56. Threaded rod; 57. Limit plate. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] As described in the background technology, currently, the non-operating protection of spacecraft engines mainly adopts passive protection methods such as traditional polymer foam filling. This type of method has obvious limitations in the application of aerospace, that is, the protective effect of traditional polymer foam is limited. When it collides with a hard object, the polymer foam material cannot play a good protective effect, which leads to mechanical damage to the engine. Therefore, how to provide a protective mechanism with strong rigidity, easy disassembly and installation, and firm connection has become a technical problem that needs to be solved urgently by technicians in this field.

[0021] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3, Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The present invention provides an engine protection mechanism, including an engine bracket, a protection tool 3 and a connecting piece 4. An engine 2 is mounted on the engine bracket 1. The protection tool 3 is sleeved on the engine 2 and connected to the engine bracket 1. The engine 2 is connected to the engine bracket 1 through the connecting piece 4.

[0022] Specifically, in the technical solution of the present invention, a part of the engine 2 is located inside the engine bracket 1, and the other part is completely "wrapped" by the protective tooling 3, thereby achieving the purpose of protecting the engine 2. The engine bracket 1 and the protective tooling 3 in the present invention are both made of materials with relatively high rigidity, such as metal materials, so that even if the protective mechanism of the present invention collides with an external object with a relatively hard texture, it can still effectively protect the engine 2 and prevent it from being mechanically damaged.

[0023] Preferably, the engine bracket 1 comprises: an arc bracket A11, a transverse support rod 12, an arc bracket B13, a conical bracket A14, a conical bracket B15, a connecting frame 16, a conical bracket C17, a longitudinal support rod 18 and a mounting plate 19, wherein the transverse support rod 12 is provided in multiple groups, and one end of the arc bracket A11 is connected to the arc bracket, the other end of the arc bracket B13 and the transverse support rod 12 are connected to the arc bracket B13, one end of the conical bracket A14 is connected to the arc bracket A11, and the other end is connected to the arc bracket The arc bracket B13 is connected, one end of the conical bracket B15 is connected to the arc bracket A11, and the other end is connected to the arc bracket B13, one end of the connecting frame 16 is connected to the conical bracket A14, and the other end is connected to the conical bracket B15, the conical bracket C17 is installed on the arc bracket A11, and the longitudinal support rod 18 is installed on the arc bracket A11, and the conical bracket A14, the conical bracket B15, the connecting frame 16, the conical bracket C17 and the longitudinal support rod 18 are all installed with a mounting plate 19.

[0024] Specifically, a portion of the engine 2 in the present invention is located at the bottom of the conical bracket A14 and the conical bracket B15, and is "wrapped" by the arc bracket A11 and the arc bracket B13. In order to prevent foreign objects from damaging the engine 2 through the gap between the arc bracket A11 and the arc bracket B13, the present invention also provides a transverse support rod 12, and the number of the transverse support rods 12 can be determined according to the environment, and cannot be less than three groups. At the same time, the present invention includes at least six groups of mounting plates 19, and the protective mechanism of the present invention can be firmly fixed on the wall of the satellite through the mounting plates 19.

[0025] Preferably, there are multiple groups of longitudinal support rods 18, which are symmetrically distributed at both ends of the arc-shaped bracket A11.

[0026] Specifically, in a preferred embodiment, the number of the longitudinal support rods 18 is two groups, and they are respectively distributed on both sides of the conical bracket C17, so that the engine bracket 1 is subjected to balanced force.

[0027] Preferably, the protective tooling 3 includes: a protective sleeve 31, a U-shaped connector 32, a protective cap 33 and a protrusion 34. The protective sleeve 31 is sleeved on the engine 2. One end of the U-shaped connector 32 is connected to one end of the protective sleeve 31, and the other end is connected to the arc-shaped bracket B13. The protective cap 33 is rotatably connected to the other end of the protective sleeve 31. The protrusion 34 is fixedly installed on the protective sleeve 31. An L-shaped through groove 35 is opened on the side of the protective cap 33 close to the protective sleeve 31, and the protrusion 34 is slidably connected to the inside of the L-shaped through groove 35.

[0028] Specifically, multiple groups of U-shaped connectors 32 are also provided, and the multiple groups of U-shaped connectors 32 are evenly distributed circumferentially at one end of the protective sleeve 31. The protective sleeve 31 is firmly fixed on the arc-shaped bracket B13 through the multiple groups of U-shaped connectors 32. An anti-collision ring is installed at the end of the protective cap 33 away from the protective sleeve 31, which further reduces the exposed area of ​​the engine 2 and avoids collision between small foreign objects and the engine 2. When disassembling, the protective cap 33 can be removed by simply rotating it. When disassembling the protective sleeve 31, it is only necessary to remove the corresponding bolts to complete the disassembly of the entire protective tooling 3. Compared with the use of polymer foam for filling in the prior art, the technical solution of the present invention is more convenient and quick to install and disassemble.

[0029] Preferably, a threaded hole 321 is formed at one end of the U-shaped connector 32 away from the protective sleeve 31, and the U-shaped connector 32 is connected to the arc-shaped bracket B13 by bolts.

[0030] Preferably, the connecting member 4 includes: a connecting rod A41, a semicircular fixing plate A42, a rotating block A44, a swing rod A45, a connecting rod B46, a semicircular fixing plate B47, a rotating block B49 and a swing rod B410, the connecting rod A41 is connected to the engine 2, the semicircular fixing plate A42 is installed inside the connecting rod A41, and a slide groove A43 is provided on the semicircular fixing plate A42, the rotating block A44 is rotatably connected to the semicircular fixing plate A42, and one end of the swing rod A45 is connected to the rotating block A44. The other end extends out of the connecting rod A41, the swing rod A45 is slidably connected to the slide groove A43, the connecting rod B46 is connected to the arc bracket B13, the semicircular fixed plate B47 is installed inside the connecting rod B46, and the semicircular fixed plate B47 is provided with a slide groove B48, the rotating block B49 is rotatably connected to the semicircular fixed plate B47, one end of the swing rod B410 is connected to the rotating block B49, and the other end extends out of the connecting rod B46, and the swing rod B410 is slidably connected to the slide groove B48.

[0031] Specifically, while the engine 2 is protected externally, in order to prevent the engine 2 from loosening due to the use of traditional bolts during transportation, thereby causing the engine 2 to shake and collide with the protective tooling 3, the present invention uses a connecting piece 4 so that the engine 2 can remain locked after being installed on the engine bracket 1, and will not shake due to the loosening of the connecting piece 4.

[0032] Furthermore, when the connecting member 4 in the present invention is used in a specific application, the connecting rod A41 and the connecting rod B46 move toward each other. After the semicircular fixing plate A42 and the semicircular fixing plate B47 are completely "engaged" to form a complete circle, the operator presses the swing rod A45 in the direction of the connecting rod A41 to lock it in the locking mechanism 5. At this time, the rotating block A44 and the rotating block B49 both rotate, and due to the limiting effect of the semicircular fixing plate A42 and the semicircular fixing plate B47, they cannot move in any direction, thereby making the engine 2 firmly installed without loosening, thereby avoiding the collision between the engine 2 and the protective tooling 3.

[0033] Preferably, a swing rod locking mechanism 5 is installed on the connecting rod A41 for locking the swing rod A45.

[0034] Preferably, the locking mechanism 5 includes: a locking block 51, a sliding rod 53, a fixing plate 54, a fixing plate locking piece 55, a threaded rod 56 and a limit plate 57. The locking block 51 is installed on the connecting rod A41, and a rocker bar sliding groove 52 is opened on the locking block 51. The rocker bar A45 is slidingly connected to the locking block 51 through the rocker bar sliding groove 52. The sliding rod 53 is slidingly connected to the inside of the locking block 51. The fixing plate 54 is installed at one end of the sliding rod 53. The fixing plate locking piece 55 is installed inside the locking block 51 for clamping the fixing plate 54. One end of the threaded rod 56 is connected to the other end of the sliding rod 53. The limit plate 57 is installed on the locking block 51. The other end of the threaded rod 56 passes through the limit plate 57 and is rotatably connected to the limit plate 57.

[0035] Specifically, when the swing rod A45 is locked, the swing rod A45 first slides to the bottom of the swing rod sliding groove 52, and then the threaded rod 56 is rotated. The threaded rod 56 pushes the slide bar 53 to move laterally until the fixed plate 54 is inserted into the fixed plate locking member 55 to complete the locking. At this time, the swing rod A45 cannot swing, ensuring that the engine 2 is firmly connected to the engine bracket 1 without looseness. At the same time, the space of the swing rod sliding groove 52 at the bottom of the slide bar 53 should just accommodate the swing rod A45.

[0036] Preferably, the fixing plate locking member 55 includes: an arc-shaped clamp A551, an arc-shaped clamp B552, a spring A553 and a spring B554, the arc-shaped clamp B552 is rotatably connected to the arc-shaped clamp A551, and the arc-shaped clamp A551 and the arc-shaped clamp B552 are both arranged inside the locking block 51, one end of the spring A553 is connected to the inner wall of the locking block 51, and the other end is connected to the arc-shaped clamp A551, one end of the spring B554 is connected to the inner wall of the locking block 51, and the other end is connected to the arc-shaped clamp B552.

[0037] Specifically, when the fixing plate 54 moves toward the arc-shaped clamp plate A551 and the arc-shaped clamp plate B552, the arc-shaped clamp plate A551 and the arc-shaped clamp plate B552 are opened, and the spring A553 and the spring B554 are compressed. When the fixing plate 54 is completely wrapped by the arc-shaped clamp plate A551 and the arc-shaped clamp plate B552, the spring A553 and the spring B554, under the action of elasticity, make the arc-shaped clamp plate A551 and the arc-shaped clamp plate B552 close, clamp the fixing plate 54, and thereby achieve a locking effect.

[0038] Preferably, one end of the sliding rod 53 away from the threaded rod 56 passes through the rocker rod sliding slot 52 and is slidably connected to the locking block 51 .

[0039] Specifically, the operator only needs to rotate the threaded rod 56 on one side of the limiting plate 57 to achieve the effect of controlling the locking mechanism 5 .

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0044] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. An engine protection mechanism, characterized in that: include: An engine bracket (1), wherein an engine (2) is mounted on the engine bracket (1); A protective tool (3) is sleeved on the engine (2) and connected to the engine bracket (1); A connecting member (4), wherein the engine (2) is connected to the engine bracket (1) via the connecting member (4).

2. The engine protection mechanism according to claim 1, characterized in that: The engine bracket (1) comprises: Arc bracket A (11); A plurality of transverse support rods (12) are provided, and one end of the transverse support rods (12) is connected to the arc-shaped support A (11); An arc-shaped bracket B (13), the other end of the transverse support rod (12) being connected to the arc-shaped bracket B (13); A conical support A (14), one end of which is connected to the arc-shaped support A (11), and the other end of which is connected to the arc-shaped support B (13); A conical support B (15), one end of which is connected to the arc-shaped support A (11), and the other end of which is connected to the arc-shaped support B (13); A connecting frame (16), one end of which is connected to the conical support A (14), and the other end of which is connected to the conical support B (15); A conical support C (17) mounted on the arc support A (11); A longitudinal support rod (18) mounted on the arc-shaped bracket A (11); A mounting plate (19) is installed on the conical bracket A (14), the conical bracket B (15), the connecting frame (16), the conical bracket C (17) and the longitudinal support rod (18).

3. The engine protection mechanism according to claim 2, characterized in that: The longitudinal support rods (18) are provided in multiple groups and are symmetrically distributed at both ends of the arc-shaped bracket A (11).

4. The engine protection mechanism according to claim 2, characterized in that: Protective equipment (3) includes: A protective sleeve (31) sleeved on the engine (2); A U-shaped connecting piece (32), one end of which is connected to one end of the protective sleeve (31), and the other end of which is connected to the arc-shaped bracket B (13); A protective cap (33) rotatably connected to the other end of the protective sleeve (31); The protrusion (34) is fixedly mounted on the protective sleeve (31); an L-shaped through groove (35) is formed on a side of the protective cap (33) close to the protective sleeve (31); and the protrusion (34) is slidably connected inside the L-shaped through groove (35).

5. The engine protection mechanism according to claim 4, characterized in that: A threaded hole (321) is formed at one end of the U-shaped connecting piece (32) away from the protective sleeve (31), and the U-shaped connecting piece (32) is connected to the arc-shaped bracket B (13) via bolts.

6. The engine protection mechanism according to claim 2, characterized in that: The connecting member (4) comprises: A connecting rod A (41), connected to the engine (2); A semicircular fixing plate A (42) is installed inside the connecting rod A (41), and a sliding groove A (43) is formed on the semicircular fixing plate A (42); A rotating block A (44) rotatably connected to the semicircular fixed plate A (42); A swing rod A (45), one end of which is connected to the rotating block A (44), and the other end of which extends to the outside of the connecting rod A (41), and the swing rod A (45) is slidably connected to the sliding groove A (43); A connecting rod B (46) connected to the arc-shaped bracket B (13); A semicircular fixing plate B (47) is installed inside the connecting rod B (46), and a sliding groove B (48) is formed on the semicircular fixing plate B (47); A rotating block B (49) rotatably connected to the semicircular fixed plate B (47); A swing rod B (410) has one end connected to the rotating block B (49) and the other end extending to the outside of the connecting rod B (46). The swing rod B (410) is slidably connected to the sliding groove B (48).

7. The engine protection mechanism according to claim 6, characterized in that: The connecting rod A (41) is provided with a swing rod locking mechanism (5) for locking the swing rod A (45).

8. The engine protection mechanism according to claim 7, characterized in that: The locking mechanism (5) comprises: A locking block (51) is mounted on the connecting rod A (41), and a swing rod sliding groove (52) is formed on the locking block (51), and the swing rod A (45) is slidably connected to the locking block (51) via the swing rod sliding groove (52); A sliding rod (53) slidably connected to the interior of the locking block (51); A fixing plate (54) mounted on one end of the sliding rod (53); A fixing plate locking member (55) installed inside the locking block (51) and used for clamping the fixing plate (54); A threaded rod (56), one end of which is connected to the other end of the sliding rod (53); A limit plate (57) is mounted on the locking block (51); the other end of the threaded rod (56) passes through the limit plate (57) and is rotatably connected to the limit plate (57).

9. The engine protection mechanism according to claim 8, characterized in that: The fixing plate locking member (55) comprises: Arc splint A (551); An arc-shaped clamping plate B (552) is rotatably connected to the arc-shaped clamping plate A (551), and the arc-shaped clamping plate A (551) and the arc-shaped clamping plate B (552) are both arranged inside the locking block (51); A spring A (553), one end of which is connected to the inner wall of the locking block (51), and the other end of which is connected to the arc-shaped clamping plate A (551); A spring B (554) has one end connected to the inner wall of the locking block (51) and the other end connected to the arc-shaped clamping plate B (552).

10. The engine protection mechanism according to claim 8, characterized in that: One end of the sliding rod (53) away from the threaded rod (56) passes through the swing rod sliding slot (52) and is slidably connected to the locking block (51).

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