Mechanical maintainable folding rudder

Abstract

The invention provides a mechanical maintainable folding rudder, and belongs to the technical field of air rudders, the mechanical maintainable folding rudder comprises: a movable rudder surface, which is provided with a first rotating shaft sleeve, and the first rotating shaft sleeve is provided with a first locking hole and a second locking hole; the fixed control surface is provided with a second rotating shaft sleeve; the first rotating shaft sleeve is rotatably connected with the second rotating shaft sleeve; the initial locking mechanism is arranged on the fixed control surface, and the initial locking mechanism is telescopically connected with the first locking hole; and the in-place locking mechanism is arranged on the fixed control surface, and the in-place locking mechanism is telescopically connected with the second locking hole. The folding state of the folding rudder can be unlocked through separation of the initial locking mechanism and the first locking hole, then the first rotating shaft sleeve is rotated from the first position to the second position, and the unfolding state of the folding rudder is locked by inserting the in-place locking mechanism into the second locking hole; and the mutual conversion between the folding state and the unfolding state of the folding rudder is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of air rudders and relates to a mechanical maintainable folding rudder. Background Art

[0002] In order to improve the combat effectiveness and maneuverability of the aircraft carrier platform and to carry as many missiles as possible in a limited space, the use of folding rudders is an inevitable choice.

[0003] During service, the folding rudder surface needs to be quickly unfolded and reliably locked. Therefore, how to achieve the rapid unfolding of the folding rudder and how to improve the reliability of the mechanism to achieve reliable locking are problems that need to be solved at present, and there is a lot of room for improvement. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the prior art and to propose a mechanical maintainable folding rudder.

[0005] The object of the present invention can be achieved by the following technical solutions: A mechanical maintainable folding rudder, comprising:

[0006] A dynamic rudder surface, comprising a first rotating shaft sleeve, wherein the first rotating shaft sleeve is provided with a first locking hole and a second locking hole;

[0007] A fixed rudder surface, which has a second rotating shaft sleeve, and the fixed rudder surface includes a first position and a second position;

[0008] The first rotating shaft sleeve is rotatably connected to the second rotating shaft sleeve via a matching rotating shaft, and the first rotating shaft sleeve can be rotated to the first position or the second position;

[0009] an initial locking mechanism, which is arranged on the fixed rudder surface, and is telescopically connected to the first locking hole. When the second rotating shaft sleeve rotates to the first position, the initial locking mechanism is inserted into the first locking hole so that the folding rudder is kept in a folded state;

[0010] An in-place locking mechanism is arranged on the fixed rudder surface, and the in-place locking mechanism is telescopically connected to the second locking hole. When the second rotating shaft sleeve rotates to the second position, the in-place locking mechanism is inserted into the second locking hole to keep the folding rudder in the unfolded state.

[0011] In the above-mentioned mechanically maintainable folding rudder, the fixed rudder surface is provided with a first mounting cavity and a first through hole, the first through hole is connected to the first mounting cavity, the initial locking mechanism is arranged in the first mounting cavity, the initial locking mechanism includes a first locking pin and a first spring, the first locking pin can move along the radial direction of the first rotating shaft sleeve and can extend out of the first through hole, one end of the first spring is in contact with the wall surface of the first mounting cavity, and the other end of the first spring is in contact with the first locking pin, the first spring can push the first locking pin to retract into the first through hole, and a first operating part is provided at one end of the first locking pin away from the first spring.

[0012] In the above-mentioned mechanically maintainable folding rudder, the initial locking mechanism also includes a change pin, which can move along the axial direction of the first rotating shaft sleeve, the first locking pin is provided with a first change bevel, the change pin is provided with a second change bevel, the second change bevel is in contact with the first change bevel, and the change pin can drive the first locking pin to move along the radial direction of the first rotating shaft sleeve by moving along the axial direction of the first rotating shaft sleeve.

[0013] In the above-mentioned mechanically maintainable folding rudder, the first locking hole is provided with a first guide slope, and the first locking pin is provided with a second guide slope at one end close to the first spring. When the first rotating shaft sleeve rotates from the second position to the first position, the first locking pin slides along the first guide slope into the first locking hole through the second guide slope.

[0014] In the above-mentioned mechanically maintainable folding rudder, the fixed rudder surface is provided with a second mounting cavity and a second through hole, the second through hole is connected to the second mounting cavity, the in-place locking mechanism is arranged in the second mounting cavity, the in-place locking mechanism includes a second locking pin and a second spring, the second locking pin can move along the radial direction of the first rotating shaft sleeve and can extend out of the second through hole, one end of the second spring is in contact with the wall surface of the second mounting cavity, and the other end of the second spring is in contact with the second locking pin, the second spring can push the second locking pin to insert into the second locking hole, and a second operating part is provided at one end of the second locking pin close to the second spring.

[0015] In the above-mentioned mechanically maintainable folding rudder, the first rotating shaft sleeve is provided with a first limiting portion, and the fixed rudder surface is provided with a second limiting portion. When the first rotating shaft sleeve is rotated to the first position, the second limiting portion contacts the first limiting portion and limits the first rotating shaft sleeve from rotating in a direction away from the second position.

[0016] In the above-mentioned mechanically maintainable folding rudder, it also includes a side inspection cover, which is detachably connected to the fixed rudder surface, and the side inspection cover can cover the initial locking mechanism and / or the in-place locking mechanism.

[0017] In the above-mentioned mechanically maintainable folding rudder, it also includes a bottom inspection cover, which is detachably connected to the fixed rudder surface and can cover the initial locking mechanism and / or the in-place locking mechanism.

[0018] In the above-mentioned mechanical maintainable folding rudder, it also includes a power source, which is arranged between the dynamic rudder surface and the fixed rudder surface, and the power source can drive the first rotating shaft sleeve to rotate from the first position to the second position.

[0019] In the above-mentioned mechanical maintainable foldable rudder, a special-shaped groove is provided on the end of the power source that cooperates with the first rotating shaft sleeve, and the special-shaped groove is used for inserting a tool and driving the second rotating shaft sleeve to rotate from the second position to the first position.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The folding state of the folding rudder can be unlocked by separating the initial locking mechanism from the first locking hole, and then the second shaft sleeve can be rotated from the first position to the second position and the unfolded state of the folding rudder can be locked by inserting the in-place locking mechanism into the second locking hole, thereby realizing the mutual conversion between the folding state and the unfolded state of the folding rudder.

[0022] 2. The first locking pin can be extended out of the first through hole by manually pushing the first operating part and kept locked when the folding rudder is in a folded state, and automatically unlocked due to the action of the first spring without applying force, so that the second shaft sleeve can be rotated from the first position to the second position.

[0023] 3. The change pin is used to transmit and change the direction of force. The change pin can drive the first locking pin to move along the radial direction of the second shaft sleeve by moving along the axial direction of the second shaft sleeve, which makes it easier for the user to control the first locking pin by manipulating the change pin.

[0024] 4. When the barrier is inserted into the safety hole, it presses against the direction-changing pin. At this time, the direction-changing pin is pushed in and the second direction-changing inclined surface contacts the first direction-changing inclined surface, thereby pressing against the first locking pin to keep it extending out of the first through hole.

[0025] 5. When the second shaft sleeve rotates from the first position to the second position, the second locking pin extends out of the second through hole due to the action of the second spring without applying force and remains locked when the folding rudder is in the unfolded state, or the unfolded state can be unlocked by manually pulling the second operating part.

[0026] 6. The side inspection cover / bottom inspection cover covers the opening of the first installation cavity and / or the opening of the second installation cavity. The internal initial locking mechanism and / or the in-place locking mechanism can be repaired and replaced by removing the side inspection cover / bottom inspection cover separately.

[0027] 7. The second rotating shaft sleeve is driven to rotate from the first position to the second position by a power source, and a mechanical elastic energy storage element source provides a large torque, so that the folding rudder can be automatically folded at a large angle and quickly unfolded from a folded state to an unfolded state.

[0028] 8. The special-shaped groove is used for inserting a tool and driving the second rotating shaft sleeve to rotate from the second position to the first position, thereby realizing manual resetting of the folding rudder from the unfolded state to the folded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the folding rudder of the present invention.

[0030] Figure 2 It is a front view of the folding rudder of the present invention.

[0031] Figure 3 for Figure 2 Cross-sectional view from AA perspective.

[0032] Figure 4 It is an exploded view of the folding rudder of the present invention.

[0033] Figure 5 It is a schematic diagram of the folding state of the folding rudder of the present invention.

[0034] Figure 6 It is a schematic diagram of the unfolded state of the folding rudder of the present invention.

[0035] Figure 7 It is a structural schematic diagram of the dynamic control surface of the present invention.

[0036] Figure 8 It is a structural schematic diagram of the fixed rudder surface of the present invention.

[0037] Fig. 9 It is a structural schematic diagram of the initial locking mechanism and the in-position locking mechanism of the fixed rudder surface of the present invention.

[0038] Fig.10 It is a schematic structural diagram of the initial locking mechanism and the in-position locking mechanism of the present invention.

[0039] In the figure, 100, dynamic rudder surface; 110, first shaft sleeve; 111, first locking hole; 1111, first guide inclined surface; 112, second locking hole; 113, first limiting portion; 200, fixed rudder surface; 210, second shaft sleeve; 211, special-shaped groove; 220, second limiting portion; 230, first installation cavity; 240, first through hole; 250, second installation cavity; 260, second through hole; 270, Safety hole; 300, initial locking mechanism; 310, first locking pin; 311, first operating part; 312, first direction-changing slope; 313, second guide slope; 320, first spring; 330, direction-changing pin; 331, second direction-changing slope; 400, in-position locking mechanism; 410, second locking pin; 411, second operating part; 420, second spring; 500, side inspection cover; 600, bottom inspection cover. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "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.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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.

[0044] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0046] like Figure 1-Figure 10 As shown, a mechanical maintainable foldable rudder comprises a movable rudder surface 100 , a fixed rudder surface 200 , an initial locking mechanism 300 and an in-position locking mechanism 400 .

[0047] The dynamic control surface 100 has a first rotating shaft sleeve 110, and the first rotating shaft sleeve 110 is provided with a first locking hole 111 and a second locking hole 112. The dynamic control surface 100 includes a first position and a second position, and the first rotating shaft sleeve 110 can be rotated to the first position or the second position.

[0048] The fixed rudder surface 200 has a second rotating shaft sleeve 210, and the second rotating shaft sleeve 210 can be rotatably connected to the first rotating shaft sleeve 110 via a power source rotating shaft.

[0049] Among them, the initial locking mechanism 300 is arranged on the fixed rudder surface 200, and the initial locking mechanism 300 is telescopically connected to the first locking hole 111. When the first rotating shaft sleeve 110 rotates to the first position, the initial locking mechanism 300 is inserted into the first locking hole 111 to keep the folding rudder in a folded state.

[0050] Among them, the in-place locking mechanism 400 is arranged on the fixed rudder surface 200, and the in-place locking mechanism 400 is telescopically connected to the second locking hole 112. When the first rotating shaft sleeve 110 rotates to the second position, the in-place locking mechanism 400 is inserted into the second locking hole 112 to keep the folding rudder in the unfolded state.

[0051] Specifically, when the first rotating shaft sleeve 110 rotates to the first position, the folding rudder remains in a folded state, and when the first rotating shaft sleeve 110 rotates to the second position, the folding rudder remains in an unfolded state.

[0052] In this embodiment, the folding state of the folding rudder can be unlocked by separating the initial locking mechanism 300 from the first locking hole 111, and then the first shaft sleeve 110 is rotated from the first position to the second position and the unfolded state of the folding rudder is locked by inserting the in-position locking mechanism 400 into the second locking hole 112, thereby realizing the mutual conversion between the folding state and the unfolded state of the folding rudder.

[0053] like Figure 1-Figure 10 As shown, on the basis of the above embodiment, the fixed rudder surface 200 is provided with a first mounting cavity 230 and a first through hole 240, the first through hole 240 is connected to the first mounting cavity 230, the initial locking mechanism 300 is arranged in the first mounting cavity 230, the initial locking mechanism 300 includes a first locking pin 310 and a first spring 320, the first locking pin 310 can move along the radial direction of the first rotating shaft sleeve 110 and can extend out of the first through hole 240, one end of the first spring 320 is in contact with the wall surface of the first mounting cavity 230, the other end of the first spring 320 is in contact with the first locking pin 310, the first spring 320 can push the first locking pin 310 to retract into the first through hole 240, and the first locking pin 310 is provided with a first operating portion 311 at one end away from the first spring 320.

[0054] In this embodiment, the first locking pin 310 can be extended out of the first through hole 240 by manually pushing the first operating part 311 and kept locked when the folding rudder is in a folded state, and automatically unlocked due to the action of the first spring 320 without applying force, so that the first shaft sleeve 110 can be rotated from the first position to the second position.

[0055] like Figure 1-Figure 10 As shown, on the basis of the above embodiment, the initial locking mechanism 300 also includes a change pin 330, and the change pin 330 can move along the axial direction of the first rotating shaft sleeve 110, and the first locking pin 310 is provided with a first change bevel 312, and the change pin 330 is provided with a second change bevel 331, and the second change bevel 331 is in contact with the first change bevel 312, and the change pin 330 can drive the first locking pin 310 to move along the radial direction of the first rotating shaft sleeve 110 by moving along the axial direction of the sleeve of the first rotating shaft 110.

[0056] In this embodiment, the first locking pin 310 can be extended out of the first through hole 240 by manually pushing the first operating part 311 and kept locked when the folding rudder is in the folded state, and can be automatically unlocked due to the action of the first spring 320 without applying force, so that the first shaft sleeve 110 can be rotated from the first position to the second position. Figure 1-Figure 10As shown, based on the above embodiment, the fixed rudder surface 200 is further provided with a safety hole 270 into which a barrier can be inserted, and the safety hole 270 is located in the first installation cavity 230 at one end of the change-direction pin 330 away from the first locking pin 310 .

[0057] Specifically, the obstruction may be a pin or a screw.

[0058] In this embodiment, when the barrier is inserted into the safety hole 270 , it presses against the change-direction pin 330 . At this time, the change-direction pin 330 is pushed in and the second change-direction slope 331 contacts the first change-direction slope 312 , thereby pressing the first locking pin 310 to keep extending out of the first through hole 240 .

[0059] like Figure 1-Figure 10 As shown, based on the above embodiment, the first locking hole 111 is provided with a first guide bevel 1111, and the first locking pin 310 is provided with a second guide bevel 313 at one end close to the first spring 320, and when the first rotating shaft sleeve 110 rotates from the second position to the first position, the first locking pin 310 slides along the first guide bevel 1111 through the second guide bevel 313 into the first locking hole 111.

[0060] In this embodiment, when the first shaft sleeve 110 rotates from the second position to the first position, the first locking pin 310 slides along the first guiding bevel 1111 through the second guiding bevel 313 into the first locking hole 111, especially when the folding rudder is manually reset from the unfolded state to the folded state.

[0061] like Figure 1-Figure 10 As shown, on the basis of the above embodiment, the fixed rudder surface 200 is provided with a second mounting cavity 250 and a second through hole 260, the second through hole 260 is communicated with the second mounting cavity 250, the in-place locking mechanism 400 is arranged in the second mounting cavity 250, the in-place locking mechanism 400 includes a second locking pin 410 and a second spring 420, the second locking pin 410 can move along the radial direction of the first rotating shaft sleeve 110 and can extend out of the second through hole 260, one end of the second spring 420 is in contact with the wall surface of the second mounting cavity 250, the other end of the second spring 420 is in contact with the second locking pin 410, the second spring 420 can push the second locking pin 410 to insert into the second locking hole 112, and the second locking pin 410 is provided with a second operating portion 411 at one end close to the second spring 420.

[0062] In this embodiment, when the first shaft sleeve 110 rotates from the first position to the second position, the second locking pin 410 extends out of the second through hole 260 due to the action of the second spring 420 without applying force and remains locked when the folding rudder is in the unfolded state, or the unfolded state can be unlocked by manually pulling the second operating part 411.

[0063] like Figure 1-Figure 10 As shown, on the basis of the above embodiment, the first rotating shaft 110 is provided with a first limiting portion 113, and the fixed rudder surface 200 is provided with a second limiting portion 220. When the first rotating shaft sleeve 110 rotates to the first position, the second limiting portion 220 contacts the first limiting portion 113 and limits the first rotating shaft sleeve 110 from rotating in a direction away from the second position.

[0064] Specifically, the first limiting portion 113 may be a limiting block, and the second limiting portion 220 may be a limiting groove; or the first limiting portion 113 may be a limiting groove, and the second limiting portion 220 may be a limiting block, which is not specifically limited here.

[0065] In this embodiment, when the first shaft sleeve 110 rotates from the first position to the second position, the second locking pin 410 extends out of the second through hole 260 due to the action of the second spring 420 without applying force and remains locked when the folding rudder is in the unfolded state, or the unfolded state can be unlocked by manually pulling the second operating part 411.

[0066] When the first rotating shaft sleeve 110 rotates to the first position, the second limiting portion 220 contacts the first limiting portion 113 and limits the first rotating shaft sleeve 110 from rotating in a direction away from the second position, thereby stabilizing the folding rudder in a folded state.

[0067] like Figure 1-Figure 10 As shown, based on the above embodiment, it also includes a side inspection cover 500, which is detachably connected to the fixed rudder surface 200, and the side inspection cover 500 can cover the initial locking mechanism 300 and / or the in-place locking mechanism 400.

[0068] In this embodiment, the side inspection cover 500 covers the opening of the first installation cavity 230 and / or the opening of the second installation cavity 250, and the internal initial locking mechanism 300 and / or the in-place locking mechanism 400 can be repaired and replaced by removing the side inspection cover 500 separately.

[0069] like Figure 1-Figure 10 As shown, based on the above embodiment, it also includes a bottom inspection cover 600, which is detachably connected to and can cover the fixed rudder surface 200, and the bottom inspection cover 600 can cover the initial locking mechanism 300 and / or the in-place locking mechanism 400.

[0070] Specifically, ends of the first spring 320 and / or the second spring 420 are in contact with the bottom access cover 600 .

[0071] In this embodiment, the bottom inspection cover 600 covers the opening of the first installation cavity 230 and / or the opening of the second installation cavity 250, and the internal initial locking mechanism 300 and / or the in-place locking mechanism 400 can be repaired and replaced by removing the bottom inspection cover 600 separately.

[0072] like Figure 1-Figure 10 As shown, based on the above embodiment, it also includes a power source (not shown in the figure), which is arranged between the dynamic rudder surface 100 and the fixed rudder surface 200, and the power source can drive the first rotating shaft sleeve 110 to rotate from the first position to the second position.

[0073] Specifically, the power source is a mechanical elastic energy storage element, which may be a torsion plate group, a torsion spring or a spring. If the torsion plate groups are connected in parallel, the parallel torsion plate groups may be a single group or multiple groups.

[0074] In the prior art, currently, folding rudders with large torque and large turning angle mostly use pyrotechnics as the power source, and the rudder surface has low measurability, poor reliability and poor maintainability after loading.

[0075] In this embodiment, the first rotating shaft sleeve 110 is driven by a power source to rotate from the first position to the second position, and the mechanical elastic energy storage element source provides a large torque to achieve automatic large folding angle and rapid deployment of the folding rudder from the folded state to the deployed state.

[0076] like Figure 1-Figure 10 As shown, based on the above embodiment, the end of the power source mechanism shaft that cooperates with the first shaft sleeve 110 is provided with a special-shaped groove 211, and the special-shaped groove 211 is used for inserting a tool and driving the first shaft sleeve 110 to rotate from the second position to the first position.

[0077] Specifically, the special-shaped groove 211 may be a hexagonal groove or a plum blossom groove, etc.

[0078] In this embodiment, the special-shaped groove 211 is used for inserting a tool and driving the first shaft sleeve 110 to rotate from the second position to the first position, thereby realizing manual resetting of the folding rudder from the unfolded state to the folded state.

[0079] In general, the folding rudder only needs to manually operate the steering pin to unlock the fixed rudder surface 200 and rotate it from the first position to the second position and lock it, thereby completing the transformation of the folding state to the unfolded state of the folding rudder, and facilitating daily maintenance and inspection.

Claims

1. A mechanical maintainable folding rudder, characterized in that: include: A dynamic rudder surface, comprising a first rotating shaft sleeve, wherein the first rotating shaft sleeve is provided with a first locking hole and a second locking hole; A fixed rudder surface, which has a second rotating shaft sleeve, and the fixed rudder surface includes a first position and a second position; The first rotating shaft sleeve is rotatably connected to the second rotating shaft sleeve via a matching rotating shaft, and the first rotating shaft sleeve can be rotated to the first position or the second position; an initial locking mechanism, which is arranged on the fixed rudder surface, and is telescopically connected to the first locking hole. When the second rotating shaft sleeve rotates to the first position, the initial locking mechanism is inserted into the first locking hole so that the folding rudder is kept in a folded state; An in-place locking mechanism is arranged on the fixed rudder surface, and the in-place locking mechanism is telescopically connected to the second locking hole. When the second rotating shaft sleeve rotates to the second position, the in-place locking mechanism is inserted into the second locking hole to keep the folding rudder in the unfolded state.

2. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: The fixed rudder surface is provided with a first installation cavity and a first through hole, the first through hole is connected to the first installation cavity, the initial locking mechanism is arranged in the first installation cavity, the initial locking mechanism includes a first locking pin and a first spring, the first locking pin can move along the radial direction of the first rotating shaft sleeve and can extend out of the first through hole, one end of the first spring is in contact with the wall surface of the first installation cavity, and the other end of the first spring is in contact with the first locking pin, the first spring can push the first locking pin to retract into the first through hole, and a first operating part is provided at one end of the first locking pin away from the first spring.

3. A mechanically maintainable foldable rudder as claimed in claim 2, characterized in that: The initial locking mechanism also includes a change-direction pin, which can move along the axial direction of the first rotating shaft sleeve, the first locking pin is provided with a first change-direction inclined surface, the change-direction pin is provided with a second change-direction inclined surface, the second change-direction inclined surface is in contact with the first change-direction inclined surface, and the change-direction pin can drive the first locking pin to move along the radial direction of the first rotating shaft sleeve by moving along the axial direction of the first rotating shaft sleeve.

4. A mechanically maintainable foldable rudder as claimed in claim 2, characterized in that: The first locking hole is provided with a first guide bevel, and the first locking pin is provided with a second guide bevel at one end close to the first spring. When the first rotating shaft sleeve rotates from the second position to the first position, the first locking pin slides along the first guide bevel into the first locking hole through the second guide bevel.

5. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: The fixed rudder surface is provided with a second mounting cavity and a second through hole, the second through hole is communicated with the second mounting cavity, the in-place locking mechanism is arranged in the second mounting cavity, the in-place locking mechanism includes a second locking pin and a second spring, the second locking pin can move along the radial direction of the first rotating shaft sleeve and can extend out of the second through hole, one end of the second spring is in contact with the wall surface of the second mounting cavity, the other end of the second spring is in contact with the second locking pin, the second spring can push the second locking pin to insert into the second locking hole, and a second operating portion is provided at one end of the second locking pin close to the second spring.

6. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: The first rotating shaft sleeve is provided with a first limiting portion, and the fixed rudder surface is provided with a second limiting portion. When the first rotating shaft sleeve rotates to the first position, the second limiting portion contacts the first limiting portion and limits the first rotating shaft sleeve from rotating in a direction away from the second position.

7. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: It also includes a side inspection cover, which is detachably connected to the fixed rudder surface, and the side inspection cover can cover the initial locking mechanism and / or the in-place locking mechanism.

8. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: It also includes a bottom inspection cover, which is detachably connected to the fixed rudder surface and can cover the initial locking mechanism and / or the in-place locking mechanism.

9. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: It also includes a power source, which is arranged between the dynamic rudder surface and the fixed rudder surface, and the power source can drive the first rotating shaft sleeve to rotate from the first position to the second position.

10. A mechanically maintainable foldable rudder as claimed in claim 1, characterized in that: The end of the power source that cooperates with the first rotating shaft sleeve is provided with a special-shaped groove, and the special-shaped groove is used for inserting a tool and driving the second rotating shaft sleeve to rotate from the second position to the first position.

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