counter-acting strut

Abstract

The application provides a reverse thrust support rod, which comprises a sleeve assembly, a locking mechanism and a limiting assembly, wherein the sleeve assembly comprises a first sleeve and a second sleeve, the first sleeve is axially slidably and radially rotatably arranged in the second sleeve, the locking mechanism is arranged on the second sleeve and is used for fixing the position of the first sleeve, so that the other end of the first sleeve is always located in the second sleeve, and the first sleeve can slide between a fully retracted position in which the first sleeve is retracted into the second sleeve and a fully extended position in which the first sleeve is extended out of the second sleeve, and the limiting assembly is used for limiting the first sleeve and the second sleeve. Because one end of the first sleeve is provided with a locking hook, one end of the second sleeve is provided with a connecting assembly, and the locking mechanism can fix the position of the first sleeve, so that one end of the first sleeve is always located in the second sleeve, the first sleeve and the second sleeve can keep the fairing in an open position, the stability of the fairing in the open position is improved, and the practical effect of the reverse thrust support rod is ensured.

Description

Technical Field

[0001] This invention relates to the field of aircraft thrust reverser structure technology, specifically to a thrust reverser strut. Background Technology

[0002] Aircraft have openings for various purposes on panels such as the cabin, engine casing, and doors. To ensure the aircraft can operate normally in the air, one or more panels are used to cover these openings.

[0003] In existing technologies, panels sometimes need to be kept in an open position to allow aircraft mechanics or other operators to understand or repair the condition of the aircraft or the structure or components beneath the panel. For example, openings and cowlings covering these openings are required on the engine casing of an aircraft. Moreover, the cowlings on the engine casing can also serve a reverse thrust function in certain situations. That is, during aircraft landing and aborted takeoff, the movement of the cowlings causes the chokes to reverse the exhaust airflow from the engine bypass, thereby generating reverse deceleration thrust. This allows the aircraft to decelerate more quickly after landing, shortening the landing distance and greatly improving aircraft safety.

[0004] Therefore, a strut is needed on the fairing to keep it in an open position. Simultaneously, the fairing must be easy to close, allowing aircraft mechanics or other operators to easily close it after understanding or repairing the internal structure or components of the engine casing and completing thrust reverser operations. This necessitates that aircraft mechanics or other operators can easily and effectively close any locking mechanisms on the strut. Furthermore, the strut itself must be easily disassembled, facilitating repair or replacement by aircraft mechanics or other operators in the event of strut failure.

[0005] Existing struts cannot satisfy the requirement of keeping the fairing in the open position while also having an easy-to-close locking mechanism. Furthermore, existing struts are not easy to disassemble, which limits their effectiveness. Summary of the Invention

[0006] This invention was made to solve the above-mentioned problems, and its purpose is to provide a thrust strut.

[0007] This invention provides a thrust strut with the following features: a sleeve assembly including a first sleeve and a second sleeve, the first sleeve being axially slidable and radially rotatable within the second sleeve, one end of the first sleeve having a locking hook with a controllable locking opening, and one end of the second sleeve having a connecting assembly; a locking mechanism disposed on the second sleeve for fixing the position of the first sleeve, ensuring that the other end of the first sleeve is always located within the second sleeve, thereby allowing the first sleeve to slide between a fully retracted position within the second sleeve and a fully extended position outside the second sleeve; and a limiting assembly disposed between the first sleeve and the second sleeve for limiting the first sleeve and the second sleeve.

[0008] The thrust strut provided by the present invention also has the following features: multiple annular grooves are provided on the outer wall of the first sleeve along the circumferential direction, and the multiple annular grooves are respectively provided near the two ends of the first sleeve; a first annular protrusion is provided on the outer wall of the second sleeve near its other end; a locking mechanism is located between the first annular protrusion and the other end of the second sleeve; multiple through holes are distributed on the outer wall of the second sleeve along the circumferential direction, and the multiple through holes are all located between the other end of the second sleeve and the first annular protrusion; the diameter of the through holes is equal to or smaller than the diameter of the annular grooves.

[0009] Furthermore, the locking mechanism includes a sliding cover, a locking element, and a first elastic element. The sliding cover is tubular and can be axially slidably fitted onto the second sleeve. The distance between the inner wall of the sliding cover and the outer wall of the second sleeve is greater than the height of the first annular protrusion. The sliding cover has an annular pressing part. A first annular cavity and a second annular cavity are formed between the sliding cover and the outer wall of the second sleeve. The first annular cavity and the second annular cavity are located on both sides of the pressing part. The pressing part is used to limit and fix multiple locking elements. The locking elements can be axially rolled in the through hole. The height of the locking elements is greater than the height of the through hole and equal to the distance between the annular wall of the first annular cavity and the outer wall of the second sleeve. The first elastic element is fitted onto the second sleeve in the axial direction and is located in the second annular cavity. One end of the first elastic element is connected to the pressing part, and the other end is connected to the first annular protrusion.

[0010] Furthermore, the distance between the pressing part and the outer wall of the second sleeve is less than the distance of the locking part above the through hole.

[0011] Furthermore, the locking mechanism includes multiple locking elements, each of which can be axially rolled within a through hole.

[0012] The thrust strut provided by the present invention also has the following features: a second annular protrusion is provided on the outer wall of the first sleeve near the other end, and a recess for placing the limiting component is provided on the other end of the second sleeve along the axial direction. The radial cross section of the recess is circular, and the center of the circle is located on the axis of the second sleeve.

[0013] Furthermore, the limiting assembly includes multiple circumferentially distributed limiting members detachably disposed between the first sleeve and the second sleeve. Each limiting member has an arc-shaped portion and a boss portion. The arc-shaped portion is disposed between the first sleeve and the second sleeve and is located in the recess. The thickness of the arc-shaped portion is greater than the distance between the second annular protrusion and the inner wall of the second sleeve. The height of the arc-shaped portion is equal to or less than the distance between the end face of the other end of the second sleeve and the bottom wall of the recess. The height of the boss portion is greater than the distance between the side wall of the recess and the outer wall of the second sleeve.

[0014] The thrust strut provided by this invention also has the following features: the locking hook includes a locking cover, a second elastic element, an upper locking plate assembly, and a lower locking plate. The locking cover is tubular and located at one end of the first sleeve. The second elastic element is axially disposed within the locking cover. The upper locking plate assembly is slidably disposed within the locking cover. The upper locking plate assembly includes two upper locking plates, one end of which is a downwardly bent hook and located outside the locking cover, while the other end is located inside the locking cover. A portion of each upper locking plate is located within the second elastic element, and the other portion is connected to the locking plate. The distance between the inner walls of the cover is less than the distance between the second elastic element and the inner wall of the lock cover. Two waist-shaped holes are opened on the side walls of the two upper locking plates in the radial direction. The two waist-shaped holes on the side wall of one upper locking plate are correspondingly set with the two waist-shaped holes on the side wall of the other upper locking plate. The lower locking plate is located between the two upper locking plates. One end of the lower locking plate is in the shape of an upward hook and is located outside the lock cover. The other end of the lower locking plate is located inside the lock cover. The distance between the other end of the lower locking plate and the inner wall of the lock cover is less than the distance between the second elastic element and the inner wall of the lock cover.

[0015] Furthermore, the lock hook also includes a slide rod assembly, which includes two slide rods. Both slide rods are inserted through the lower lock plate and are located near the other end of the lower lock plate. One end of each slide rod is slidably disposed in two oblong holes of an upper lock plate, and the other end is slidably disposed in two oblong holes of another upper lock plate.

[0016] The thrust strut provided by this invention can also have the following feature: the connecting assembly includes two corresponding bushings.

[0017] The role and effect of invention

[0018] According to the thrust reverser of the present invention, because one end of the first sleeve is provided with a locking hook and one end of the second sleeve is provided with a connecting component, and the locking mechanism can fix the position of the first sleeve, ensuring that one end of the first sleeve is always located inside the second sleeve, the first and second sleeves can maintain the fairing in an open position. Furthermore, a limiting component is provided between the first and second sleeves, which can further limit the positions of the first and second sleeves, thus improving the stability when maintaining the fairing in the open position and ensuring the practical effectiveness of the thrust reverser. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the thrust strut in an embodiment of the present invention;

[0020] Figure 2 This is a half-sectional view of the thrust strut in an embodiment of the present invention;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the image;

[0022] Figure 4 This is a first partial sectional view of the thrust strut in an embodiment of the present invention;

[0023] Figure 5 This is a second partial sectional view of the thrust strut in an embodiment of the present invention;

[0024] Figure 6 This is a partial structural diagram of the locking hook in an embodiment of the present invention;

[0025] Figure 7 This is a third partial sectional view of the thrust strut in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Thrust strut; 10. Sleeve assembly; 11. First sleeve; 111. Annular groove; 112. Second annular protrusion; 12. Second sleeve; 121. First annular protrusion; 122. Through hole; 123. Recess; 13. Third sleeve; 20. Locking mechanism; 21. Sliding cover; 211. First annular cavity; 212. Second annular cavity; 213. Pressing part; 22. Locking element; 23. First elastic element; 30. Limiting assembly; 31. Limiting element; 311. Arc-shaped part; 312. Boss part; 40. Locking hook; 41. Locking cover; 42. Second elastic element; 43. Upper locking plate; 431. Waist-shaped hole; 44. Lower locking plate; 45. Slide rod; 50. Connecting assembly; 51. Bushing. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments are described in detail with reference to the accompanying drawings.

[0029] Example

[0030] Figure 1 This is a three-dimensional structural diagram of the thrust strut in an embodiment of the present invention.

[0031] like Figure 1 As shown, this embodiment provides a thrust strut 100, including: a sleeve assembly 10, a locking mechanism 20, a limiting assembly 30, a locking hook 40, and a connecting assembly 50.

[0032] Figure 2 This is a half-sectional view of the thrust strut in an embodiment of the present invention.

[0033] like Figure 1 and Figure 2 As shown, the sleeve assembly 10 includes a first sleeve 11 and a second sleeve 12. The first sleeve 11 is axially slidable and radially rotatable within the second sleeve 12. One end of the first sleeve 11 is provided with a locking hook 40, which has a locking opening of controllable size. One end of the second sleeve 12 is provided with a connecting assembly 50.

[0034] Figure 3 yes Figure 2 Enlarged view of point A in the image. Figure 4 This is a first partial sectional view of the thrust strut in an embodiment of the present invention.

[0035] like Figures 1 to 4 As shown, the outer wall of the first sleeve 11 has multiple annular grooves 111 arranged circumferentially. In this embodiment, the number of annular grooves 111 is set to two. The two annular grooves 111 are respectively located near both ends of the first sleeve 11. The outer wall of the second sleeve 12 has a first annular protrusion 121 located near its other end. The locking mechanism 20 is located between the first annular protrusion 121 and the other end of the second sleeve 12. The outer wall of the second sleeve 12 has multiple through holes 122 distributed circumferentially, and the multiple through holes 122 are all located between the other end of the second sleeve 12 and the first annular protrusion 121. The diameter of the through holes 122 is equal to or smaller than the diameter of the annular grooves 111.

[0036] In this embodiment, a second annular protrusion 112 is provided on the outer wall of the first sleeve 11 near its other end. A recess 123 for placing the limiting component 30 is formed along the axial direction on the other end of the second sleeve 12. The radial cross-section of the recess 123 is circular, and its center is located on the axis of the second sleeve 12. The recess 123 is formed by enlarging the original sleeve opening along the axial direction from one end face of the second sleeve 12, thereby facilitating the insertion of the first sleeve 11. Furthermore, the recess 123, in conjunction with the second protrusion, not only provides space for the limiting component 30 but also ensures the limiting effect of the limiting component 30 on the first sleeve 11 and the second sleeve 12.

[0037] In this embodiment, to make the thrust strut 100 applicable to different heights of working space, the sleeve assembly 10 may also include a third sleeve 13 that allows the second sleeve 12 to slide axially, a fourth sleeve that allows the third sleeve 13 to slide axially, and other sleeves that can be interlocked. By setting multiple interlocking sleeves, the length of each sleeve is reduced, thereby reducing the length of the sleeve assembly 10 when not in use, i.e., when multiple sleeves are interlocked, thus improving the applicability of the thrust strut 100. However, when the sleeve assembly 10 also includes the third sleeve 13, the second sleeve 12 is equivalent to the original first sleeve 11. Except that the locking hook 40 is not needed at one end of the second sleeve 12, and the connecting component 50 at one end of the second sleeve 12 is removed, the second sleeve 12 needs to have the same structure as the first sleeve 11. Meanwhile, the third sleeve 13 is equivalent to the original second sleeve 12. That is, a connecting component 50 needs to be provided at one end of the third sleeve 13, and the third sleeve 13 needs to have the same structure as the second sleeve 12. Furthermore, a locking mechanism 20 needs to be provided on the third sleeve 13 to fix the position of the second sleeve 12, and a limiting component 30 also needs to be provided between the third sleeve 13 and the second sleeve 12. Similarly, when the sleeve assembly 10 also includes a fourth sleeve, a fifth sleeve, or multiple sleeves, the structure of each sleeve and the connections between them can be set with reference to the above description. In this embodiment, the sleeve assembly 10 preferably consists of two sleeves.

[0038] like Figure 2 , Figure 3 as well as Figure 4 As shown, the locking mechanism 20 is provided on the second sleeve 12 to fix the position of the first sleeve 11, so that the other end of the first sleeve 11 is always inside the second sleeve 12, thereby allowing the first sleeve 11 to slide between the fully retracted position inside the second sleeve 12 and the fully extended position outside the second sleeve 12.

[0039] The locking mechanism 20 includes a sliding cover 21, locking members 22, and a first elastic member 23. The sliding cover 21 is tubular and axially slidably fitted onto the second sleeve 12. The distance between the inner wall of the sliding cover 21 and the outer wall of the second sleeve 12 is greater than the height of the first annular protrusion 121. The sliding cover 21 has an annular pressing portion 213, forming a first annular cavity 211 and a second annular cavity 212 between the sliding cover 21 and the outer wall of the second sleeve 12. The first annular cavity 211 and the second annular cavity 212 are located on both sides of the pressing portion 213, which is used to limit and fix the multiple locking members 22. The locking members 22 are axially rollably disposed within the through hole 122. The height of the locking member 22 is greater than the height of the through hole 122 and equal to the distance between the annular wall of the first annular cavity and the outer wall of the second sleeve 12. The first elastic member 23 is axially fitted onto the second sleeve 12 and located within the second annular cavity 212. One end of the first elastic element 23 is connected to the pressing part 213, and the other end is connected to the first annular protrusion 121. The locking element 22 can be a spherical object, that is, an object capable of axial rolling along the outer wall of the first sleeve 11 within the through hole 122. In this embodiment, the locking element 22 is preferably a sphere, depending on the shape of the annular groove 111 and the through hole 122. Furthermore, in this embodiment, the first elastic element 23 is preferably a spring.

[0040] In this embodiment, the distance between the pressing part 213 and the outer wall of the second sleeve 12 is less than the distance of the locking part 22 above the through hole 122.

[0041] In this embodiment, the locking mechanism 20 may also include a plurality of locking members 22, each of which can be axially rolled within a through hole 122.

[0042] When the locking mechanism 20 is locking the sleeve assembly 10, the multiple locking members 22 in the locking mechanism 20 are rotatably positioned within the corresponding through holes 122 on the second sleeve 12, and their bottoms are all fitted into a certain annular groove 111 on the first sleeve 11. At this time, because the distance between the pressing part 213 on the sliding cover 21 and the outer wall of the second sleeve 12 is less than the distance of the locking member 22 protruding from the through hole 122, the pressing part 213 can limit and fix the multiple locking members 22, thereby initially achieving the locking of the first sleeve 11 and the second sleeve 12.

[0043] When the sleeve assembly 10 needs to be unlocked, the aircraft mechanic first moves the sliding cover 21 a certain distance axially toward one end of the second sleeve 12, and maintains the position of the sliding cover 21 for a period of time. This causes the pressing part 213 to press the first elastic element 23 in the second annular cavity 212, and the multiple locking elements 22 are no longer limited and fixed. This also positions the first annular cavity 211 above the through hole 122. The aircraft mechanic can then pull the first sleeve 11, causing the multiple locking elements 22, which are engaged with the annular groove 111, to gradually disengage from the annular groove 111 as the first sleeve 11 slides. At this point, the bottom of the locking element 22 will be rotatably connected to the outer wall of the first sleeve 11, the middle part will be located in the through hole 122 on the second sleeve 12, and the top will be located in the first annular cavity 211. Therefore, when the aircraft mechanic releases the sliding cover 21, the top of the locking member 22 will press against the pressing part 213 of the sliding cover 21 to reset, so that the first elastic member 23 remains in a compressed state until the locking member 22 is engaged with the annular groove 111 on the first sleeve 11 again. Then the first elastic member 23 resets and drives the pressing part 213 to limit and fix the locking member 22 again.

[0044] like Figure 3 and Figure 4 As shown, the limiting assembly 30 includes a plurality of circumferentially distributed limiting members 31 detachably disposed between the first sleeve 11 and the second sleeve 12. Each limiting member 31 has an arcuate portion 311 and a boss portion 312. The arcuate portion 311 is disposed between the first sleeve 11 and the second sleeve 12 and is located within the recess 123. The thickness of the arcuate portion 311 is greater than the distance between the second annular protrusion 112 and the inner wall of the second sleeve 12. The height of the arcuate portion 311 is equal to or less than the distance between the end face of the other end of the second sleeve 12 and the bottom wall of the recess 123. The height of the boss portion 312 is greater than the distance between the side wall of the recess 123 and the outer wall of the second sleeve 12.

[0045] When the first sleeve 11 and the second sleeve 12 are fixed by the limiting component 30, when the first sleeve 11 is located inside the second sleeve 12, an annular pit is formed between the recess 123 on the second sleeve 12 and the outer wall of the first sleeve 11. The aircraft mechanic can then install multiple limiting components 31 into this annular pit. Because the limiting component 31 has an arc-shaped portion 311, and the height of the arc-shaped portion 311 is equal to or less than the distance between the end face of the other end of the second sleeve 12 and the bottom wall of the recess 123, the aircraft mechanic can fill the annular pit as much as possible using multiple limiting components 31. Furthermore, since a second annular protrusion 112 is provided on the outer wall of the first sleeve 11 near the other end, and the thickness of the arc-shaped portion 311 is greater than the distance between the second annular protrusion 112 and the inner wall of the second sleeve 12, when the flight mechanic pulls the first sleeve 11 a certain distance, the limiting member 31 will abut against the second annular protrusion 112 on the outer wall of the first sleeve 11, thereby preventing the first sleeve 11 and the second sleeve 12 from disengaging from the sleeved state. In conjunction with the locking mechanism 20, the locking effect on the first sleeve 11 and the second sleeve 12 is ensured, thereby improving the stability of the reverse thrust strut 100 during operation.

[0046] When it is necessary to replace a sleeve of the thrust reverser strut 100, the aircraft mechanic only needs to remove the multiple limiting parts 31 one by one and make the locking part 22 in the locking mechanism 20 not engage with the annular groove 111 on the sleeve, so that the sleeve can be removed. This eliminates the need to disassemble the sleeve from one end of the sleeve assembly 10, thereby facilitating the maintenance or replacement of the thrust reverser strut 100 by the aircraft mechanic and improving the work efficiency of the aircraft mechanic.

[0047] Figure 5 This is a second partial sectional view of the thrust strut in an embodiment of the present invention. Figure 6 This is a partial structural diagram of the locking hook in an embodiment of the present invention.

[0048] like Figure 1 , Figure 2 , Figure 5 as well as Figure 6As shown, the locking hook 40 includes a locking cover 41, a second elastic member 42, an upper locking plate 43 assembly, and a lower locking plate 44. The locking cover 41 is tubular and is located on one end of the first sleeve 11. The second elastic member 42 is axially disposed inside the locking cover 41. The upper locking plate 43 assembly is slidably disposed inside the locking cover 41. The upper locking plate 43 assembly includes two upper locking plates 43, one end of each upper locking plate 43 being a downward hook shape and located outside the locking cover 41, and the other end being located inside the locking cover 41. A portion of each of the two upper locking plates 43 is located inside the second elastic member 42, and the distance between the other portion and the inner wall of the locking cover 41 is less than the distance between the second elastic member 42 and the inner wall of the locking cover 41. Two oblong holes 431 are correspondingly formed on the sidewalls of the two upper locking plates 43 in the radial direction. The two oblong holes 431 on the sidewall of one upper locking plate 43 are correspondingly provided with the two oblong holes 431 on the sidewall of the other upper locking plate 43. The lower locking plate 44 is located between the two upper locking plates 43, with one end in an upward hook shape and located outside the lock cover 41. The other end of the lower locking plate 44 is located inside the lock cover 41. The distance between the other end of the lower locking plate 44 and the inner wall of the lock cover 41 is less than the distance between the second elastic member 42 and the inner wall of the lock cover 41. In this embodiment, the second elastic member 42 is preferably a spring.

[0049] In this embodiment, the locking hook 40 further includes a slide bar 45 assembly. The slide bar 45 assembly includes two slide bars 45, both of which pass through the lower locking plate 44 and are located near the other end of the lower locking plate 44. One end of each of the two slide bars 45 is slidably disposed within two oblong holes 431 of an upper locking plate 43, and the other end is slidably disposed within two oblong holes 431 of another upper locking plate 43.

[0050] Figure 7 This is a third partial sectional view of the thrust strut in an embodiment of the present invention.

[0051] like Figure 1 , Figure 2 as well as Figure 7 As shown, the connecting assembly 50 includes two corresponding bushings 51.

[0052] When using this thrust strut 100, the locking hook 40 and the connecting assembly 50 can fix the sleeve assembly 10 to the required position, and both the upper locking plate 43 and the lower locking plate 44 of the locking hook 40 can be retracted, so that the locking size of the locking hook 40 can be adjusted, thereby improving the applicable scenarios for fixing the sleeve assembly 10 and thus improving the applicability of this thrust strut 100.

[0053] The role and effect of the embodiments

[0054] According to the thrust reverser involved in this embodiment, because one end of the first sleeve is provided with a locking hook and one end of the second sleeve is provided with a connecting component, and the locking mechanism can fix the position of the first sleeve, ensuring that one end of the first sleeve is always located inside the second sleeve, the first and second sleeves can keep the fairing in an open position. Furthermore, a limiting component is provided between the first and second sleeves, which can further limit the positions of the first and second sleeves, thus improving the stability when keeping the fairing in an open position, thereby ensuring the practical effect of this thrust reverser.

[0055] Furthermore, because the first sleeve of the thrust bar involved in this embodiment is provided with multiple annular grooves near its two ends, the locking mechanism can fix the first sleeve in different positions, thereby improving the practical effect of this thrust bar.

[0056] Furthermore, because the locking mechanism in the thrust strut involved in this embodiment has multiple locking components that are rotatably located in corresponding through holes on the second sleeve, and their bottoms are all fitted into a certain annular groove on the first sleeve, and because the distance between the pressing part on the sliding cover and the outer wall of the second sleeve is less than the distance of the locking component protruding from the through hole, the pressing part can limit and fix the multiple locking components, thereby initially achieving the locking of the first sleeve and the second sleeve.

[0057] Furthermore, since the second sleeve of the thrust rod involved in this embodiment is provided with multiple through holes, and the locking mechanism includes multiple locking parts that can correspond one-to-one with the multiple through holes, the locking mechanism can lock the position of the first sleeve through the locking parts in different positions, thereby improving the locking effect of the locking mechanism and ensuring the stability of the thrust rod during operation.

[0058] Furthermore, because the limiting member in the thrust reverser involved in this embodiment has an arc-shaped portion and the height of the arc-shaped portion is equal to or less than the distance between the end face of the other end of the second sleeve and the bottom wall of the recess, the aircraft mechanic can fill the aforementioned annular recess as much as possible using multiple limiting members. Also, because a second annular protrusion is provided on the outer wall of the first sleeve near the other end, and the thickness of the arc-shaped portion is greater than the distance between the second annular protrusion and the inner wall of the second sleeve, when the flight mechanic pulls the first sleeve a certain distance, the limiting member will abut against the second annular protrusion on the outer wall of the first sleeve, thereby preventing the first and second sleeves from disengaging from their fitted state. This, combined with the locking mechanism, ensures the locking effect on the first and second sleeves, thus improving the stability of the thrust reverser during operation.

[0059] Furthermore, since the first sleeve in the thrust strut involved in this embodiment is provided with a locking hook at one end and the second sleeve is provided with a connecting component at one end, the locking hook and the connecting component can fix the sleeve assembly to the required position. Moreover, since both the upper and lower locking plates of the locking hook can be retracted, the locking size of the locking hook can be adjusted, thereby improving the applicable scenarios for fixing the sleeve assembly and thus improving the applicability of this thrust strut.

[0060] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A thrust strut, characterized in that, include: A sleeve assembly includes a first sleeve and a second sleeve. The first sleeve is axially slidable and radially rotatable inside the second sleeve. One end of the first sleeve is provided with a locking hook, which has a locking opening of controllable size. One end of the second sleeve is provided with a connecting component. A locking mechanism is provided on the second sleeve to fix the position of the first sleeve, so that the other end of the first sleeve is always inside the second sleeve, thereby allowing the first sleeve to slide between a fully retracted position retracted into the second sleeve and a fully extended position extended out of the second sleeve. as well as A limiting component, disposed between the first sleeve and the second sleeve, is used to limit the movement of the first sleeve and the second sleeve. The outer wall of the first sleeve is provided with multiple annular grooves along the circumference, and the multiple annular grooves are respectively located near both ends of the first sleeve. A first annular protrusion is provided on the outer wall of the second sleeve near its other end. The locking mechanism is located between the first annular protrusion and the other end of the second sleeve. A plurality of through holes are distributed circumferentially on the outer wall of the second sleeve. All of the through holes are located between the other end of the second sleeve and the first annular protrusion. The diameter of each through hole is equal to or smaller than the diameter of the annular groove. The locking mechanism includes a sliding cover, a locking component, and a first elastic element. The sliding cover is tubular and axially slidably fitted onto the second sleeve. The distance between the inner wall of the sliding cover and the outer wall of the second sleeve is greater than the height of the first annular protrusion. The sliding cover has an annular pressing portion. A first annular cavity and a second annular cavity are formed between the sliding cover and the outer wall of the second sleeve. The first annular cavity and the second annular cavity are respectively located on both sides of the pressing portion. The pressing portion is used to limit and fix the multiple locking components. The locking element is axially and rollably disposed within the through hole. The height of the locking element is greater than the height of the through hole and equal to the distance between the annular wall of the first annular cavity and the outer wall of the second sleeve. The first elastic element is sleeved on the second sleeve along the axial direction and is located in the second annular cavity. One end of the first elastic element is connected to the pressing part, and the other end is connected to the first annular protrusion.

2. The thrust strut according to claim 1, characterized in that: in, The distance between the pressing part and the outer wall of the second sleeve is less than the distance by which the locking member protrudes above the through hole.

3. The thrust strut according to claim 1, characterized in that: in, The locking mechanism includes multiple locking elements, each of which is axially rotatably disposed within a through hole.

4. The thrust strut according to claim 1, characterized in that: in, A second annular protrusion is provided on the outer wall of the first sleeve, near the other end. The other end of the second sleeve has a recess along the axial direction for placing the limiting component. The radial cross-section of the recess is circular, and the center of the circle is located on the axis of the second sleeve.

5. The thrust strut according to claim 4, characterized in that: in, The limiting assembly includes multiple circumferentially distributed limiting members detachably disposed between the first sleeve and the second sleeve, each limiting member having an arc-shaped portion and a boss portion. The arc-shaped portion is disposed between the first sleeve and the second sleeve, and is located within the recess. The thickness of the arc-shaped portion is greater than the distance between the second annular protrusion and the inner wall of the second sleeve. The height of the arc-shaped portion is equal to or less than the distance between the end face of the other end of the second sleeve and the bottom wall of the recess. The height of the protrusion is greater than the distance between the side wall of the recess and the outer wall of the second sleeve.

6. The thrust strut according to claim 1, characterized in that: in, The locking hook includes a locking cover, a second elastic element, an upper locking plate assembly, and a lower locking plate. The locking cover is tubular and is located at one end of the first sleeve. The second elastic element is disposed axially within the lock cover. The upper locking plate assembly is slidably disposed within the lock cover. The upper locking plate assembly includes two upper locking plates, one end of each upper locking plate being a downwardly curved hook shape and located outside the lock cover, and the other end located inside the lock cover. A portion of each upper locking plate is located within the second elastic member, and the distance between the other portion and the inner wall of the lock cover is less than the distance between the second elastic member and the inner wall of the lock cover. Two oblong holes are correspondingly formed on the sidewalls of each of the two upper locking plates in the radial direction, with the two oblong holes on the sidewall of one upper locking plate corresponding to the two oblong holes on the sidewall of the other upper locking plate. The lower locking plate is located between the two upper locking plates. One end of the lower locking plate is in the shape of an upward hook and is located outside the lock cover. The other end of the lower locking plate is located inside the lock cover. The distance between the other end of the lower locking plate and the inner wall of the lock cover is less than the distance between the second elastic member and the inner wall of the lock cover.

7. The thrust strut according to claim 6, characterized in that: in, The locking hook also includes a slide rod assembly. The slide rod assembly includes two slide rods, both of which are inserted through the lower locking plate and close to the other end of the lower locking plate. One end of each slide rod is slidably disposed in two oblong holes of one upper locking plate, and the other end is slidably disposed in two oblong holes of the other upper locking plate.

8. The thrust strut according to claim 1, characterized in that: in, The connecting assembly includes two corresponding bushings.

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