Sliding conical self-adaptive adjusting mechanism and adjusting method for landing leg uplock

Abstract

The invention discloses a sliding conic self-adaptive adjusting mechanism and adjusting method for a landing leg uplock, which can realize sliding, six-degree-of-freedom adjustment and conic self-adaptive functions, and is suitable for the mounting environment and use requirements of complex locking points of a landing leg of a reusable carrier. The sliding cone direction self-adaptive adjusting mechanism can achieve six-degree-of-freedom installation and adjustment through a sliding block and a double-ball-tile structure, the problem that a landing leg of a reusable carrier is difficult to connect with a rocket body is solved, the sliding cone direction self-adaptive mechanism is simple in structure and high in reliability, the six-degree-of-freedom installation and adjustment function can be achieved, and the service life of the sliding cone direction self-adaptive mechanism is prolonged. The axial sliding function can be achieved, and the radial and transverse bearing functions can be achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of landing leg locking, specifically relating to a sliding cone adaptive adjustment mechanism and adjustment method for a landing leg upper lock. Background Technology

[0002] The locking device is mainly used to retract the landing legs of the reusable launch vehicle, ensuring sufficient clamping force. The locking device releases the landing legs before landing. It consists of a lock body and locking pins, and has both locking and unlocking functions. Because the launch vehicle experiences axial compression during fuel loading, the locking device must have a large axial deformation adaptability to ensure reliable locking at each locking point. Furthermore, due to the large structural dimensions of the landing legs, it is difficult to guarantee the positional accuracy of each locking point. Therefore, the locking device needs to have a certain range of six degrees of freedom adjustment capability to accommodate assembly errors.

[0003] In response to the aforementioned problems in existing lander locking processes, this invention discloses a sliding cone adaptive adjustment mechanism and adjustment method for a landing leg upper lock. Summary of the Invention

[0004] This invention discloses a sliding cone adaptive adjustment mechanism and adjustment method for the upper locking of landing legs. The mechanism realizes sliding and six-degree-of-freedom adjustment through a slider and a double ball bearing mechanism, which is used to meet the locking and adjustment requirements of the landing legs of reusable launch vehicles.

[0005] This invention is achieved through the following technical solution: A sliding cone adaptive adjustment mechanism for a landing leg upper locking system includes a base, on which a lifting eye screw is hinged. A locking limiter for locking the position of the lifting eye screw is provided between the base and the lifting eye screw. A slide is sleeved on the lifting eye screw, and the slide and the lifting eye screw are slidably connected in a first horizontal direction and a second horizontal direction that are perpendicular to each other. A sliding ball bearing assembly is provided inside the slide, and the sliding ball bearing assembly includes at least one set of sliding parts that slide along the first horizontal direction and the second horizontal direction outside the lifting eye screw. One side of the sliding part is rotatably contacted with a spherical surface, and the spherical surface is threadedly connected to the lifting eye screw.

[0006] To better realize the present invention, the sliding ball bearing assembly further includes a lower sliding ball bearing portion and an upper sliding ball bearing portion. The lower sliding ball bearing portion includes at least one lower sliding part that is slidably connected to the eye screw along a first horizontal direction. The top of the lower sliding part is rotatably contacted with a lower spherical part, and the lower spherical part is threadedly fitted onto the outside of the eye screw. The upper sliding ball bearing portion includes at least one upper sliding part that is slidably connected to the eye screw along a second horizontal direction. The bottom of the upper sliding part is rotatably contacted with an upper spherical part, and the upper spherical part is threadedly fitted onto the outside of the eye screw.

[0007] To better realize the present invention, the lower sliding ball bearing portion further includes a lower slider and a lower spherical nut. The lower slider is provided with a sliding groove along the first horizontal direction, and the sliding groove is slidably connected to the eye screw. The top of the lower slider is provided with a ball socket, the lower spherical nut is threadedly fitted onto the outside of the eye screw, and the bottom of the lower spherical nut is provided with a spherical surface that rotates and contacts the ball socket.

[0008] To better realize the present invention, the upper sliding ball bearing part further includes an upper slider and an upper spherical nut. The upper slider is provided with an upper sliding groove along the second horizontal direction. The upper sliding groove is slidably connected to the eye screw. The bottom of the upper slider is provided with a ball socket. The upper spherical nut is threadedly fitted onto the outside of the eye screw. The top of the upper spherical nut is provided with a spherical surface that rotates and contacts the ball socket.

[0009] To better realize the present invention, a locking washer is further provided between the top of the lower spherical nut and the bottom of the upper spherical nut.

[0010] To better realize the present invention, the locking and limiting component further includes a limiting pin and a limiting plate. The limiting plate is fixedly installed on the base. The bottom end of the lifting eye screw is provided with a connecting hole. The limiting pin passes through the connecting hole and the base. The top of the limiting plate is provided with a limiting hook to tighten the limiting pin.

[0011] The sliding cone adaptive adjustment method for the upper locking of the landing leg includes the following steps: Step 1: Place the slide block on the outside of the eye bolt, put the lower slide block on the eye bolt, and adjust the lower slide block to the elevation position along the axis of the eye bolt to temporarily fix the lower slide block; thread the lower spherical nut onto the eye bolt, rotate the lower spherical nut to make the spherical surface at the bottom of the lower spherical nut fit tightly with the ball socket at the top of the lower slide block; Step 2: Install a spherical nut on the external thread of the eye bolt, install a slider on the top of the spherical nut, and adjust the slider to the elevation position to temporarily fix it; rotate the spherical nut so that the spherical surface at the top of the spherical nut fits tightly with the ball socket at the bottom of the slider. Step 3: Check if the axial tilt angle of the eye bolt meets the standard. If it does, proceed to step 4; if it does not, repeat steps 1 and 2 until the axial tilt angle of the eye bolt meets the standard. Step 4: Secure the base to the body structure, secure the slide to the landing leg, and lock the position of the lifting ring screw using the locking limit component.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention enables sliding, six-degree-of-freedom adjustment, and conical adaptive functions, making it suitable for complex installation environments and usage requirements of reusable launch vehicle landing legs with locking points. The sliding conical adaptive adjustment mechanism, through a slider and double ball bearing structure, enables six-degree-of-freedom assembly and adjustment, solving the problem of difficult connection between the reusable launch vehicle landing legs and the rocket body. The sliding conical adaptive mechanism of this invention has a simple structure, high reliability, and can achieve six-degree-of-freedom assembly and adjustment functions, axial sliding functions, and radial and lateral load-bearing functions. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the sliding cone adaptive adjustment mechanism; Figure 2 A schematic diagram of the adaptive adjustment of the sliding ball bearing assembly; Figure 3 This is a three-dimensional structural diagram of the sliding cone adaptive adjustment mechanism.

[0014] Wherein: 1-base; 2-lifting eye screw; 3-locking limiter; 4-lower slider; 5-upper slider; 6-lower slide block; 7-upper cover plate; 8-lower spherical nut; 9-upper spherical nut; 10-locking washer. Detailed Implementation

[0015] Example 1: This embodiment discloses a sliding cone adaptive adjustment mechanism for a landing leg upper lock, such as... Figures 1-3As shown, the device includes a base 1, on which a lifting eye screw 2 is hinged. A locking limiter 3 for locking the position of the lifting eye screw 2 is provided between the base 1 and the lifting eye screw 2. A slide is fitted on the lifting eye screw 2, and the slide and the lifting eye screw 2 are slidably connected along a first horizontal direction and a second horizontal direction that are perpendicular to each other. A sliding ball bearing assembly is provided inside the slide, and the sliding ball bearing assembly includes at least one set of sliding parts that slide along the first horizontal direction and the second horizontal direction outside the lifting eye screw 2. One side of the sliding part is rotatably contacted with a spherical part, and the spherical part is threadedly connected to the lifting eye screw 2.

[0016] Furthermore, the sliding ball bearing assembly includes a lower sliding ball bearing portion and an upper sliding ball bearing portion. The lower sliding ball bearing portion includes at least one lower sliding part that is slidably connected to the eye screw 2 along a first horizontal direction. The top of the lower sliding part has a lower spherical part that is rotatably contacted and threadedly fitted onto the outside of the eye screw 2. The upper sliding ball bearing portion includes at least one upper sliding part that is slidably connected to the eye screw 2 along a second horizontal direction. The bottom of the upper sliding part has an upper spherical part that is rotatably contacted and threadedly fitted onto the outside of the eye screw 2.

[0017] The eye bolt 2 is locked to the base 1 using locking limiter 3, and the base 1 is fixedly installed to the aircraft structure. The slide includes a lower slide seat 6 and an upper cover plate 7. The lower slide seat 6 is fixedly installed to the landing leg structure. The upper cover plate 7 is fixedly installed on the top of the lower slide seat 6 by connecting screws to form a slide structure. The lower slide seat 6 is slidably connected to the eye bolt 2 along the first horizontal direction, that is, a waist-shaped groove is provided at the bottom of the lower slide seat 6 along the first horizontal direction. The upper cover plate 7 is slidably connected to the eye bolt 2 along the second horizontal direction, that is, a waist-shaped groove is provided at the top of the upper cover plate 7 along the second horizontal direction. A cavity for installing the lower sliding ball bearing and the upper sliding ball bearing is formed between the lower slide seat 6 and the upper cover plate 7.

[0018] The eye screw 2 is passed through the lower sliding seat 6, and then the lower sliding ball bearing is installed on the outside of the eye screw 2. Through the sliding fit ball bearing structure between the sliding part and the ball bearing surface, when the ball bearing surface is pressed down along the axial direction of the eye screw 2, it automatically squeezes the sliding part, thereby automatically adjusting the tilt angle of the eye screw 2 axis relative to the first horizontal direction. Similarly, when the upper sliding ball bearing is installed, through the sliding fit ball bearing structure between the sliding part and the ball bearing surface, when the ball bearing surface is pushed up along the axial direction of the eye screw 2, it automatically squeezes the sliding part, thereby automatically adjusting the tilt angle of the eye screw 2 axis relative to the second horizontal direction, ultimately ensuring that the tilt angle of the eye screw 2 axis relative to the horizontal plane is within the calibrated allowable range. After assembly, the mechanism has the basic function of bearing loads both vertically and horizontally, and when the rocket body axially contracts due to fuel loading, the internal mechanism can achieve axial sliding through a slider structure to adapt to deformation.

[0019] Example 2: This embodiment discloses a sliding cone adaptive adjustment mechanism for the upper locking of the landing leg, which is an optimization based on Embodiment 1, such as... Figure 1 and Figure 2 As shown, the lower sliding ball bearing includes a lower slider 4 and a lower spherical nut 8. The lower slider 4 has a downward groove along the first horizontal direction, which is slidably connected to the eye screw 2. The top of the lower slider 4 has a ball socket, and the lower spherical nut 8 is threadedly fitted onto the outside of the eye screw 2. The bottom of the lower spherical nut 8 has a spherical surface that rotatably contacts the ball socket. The upper sliding ball bearing includes an upper slider 5 and an upper spherical nut 9. The upper slider 5 has an upper groove along the second horizontal direction, which is slidably connected to the eye screw 2. The bottom of the upper slider 5 has a ball socket, and the upper spherical nut 9 is threadedly fitted onto the outside of the eye screw 2. The top of the upper spherical nut 9 has a spherical surface that rotatably contacts the ball socket.

[0020] The lower sliding groove and the eye screw 2 are slidably connected in the first horizontal direction, allowing the relative position of the eye screw 2 and the lower slider 4 to be adjusted in the first horizontal direction. Rotating the lower spherical nut 8 causes the spherical surface at the bottom of the lower spherical nut 8 to press against the ball socket at the top of the lower slider 4. Under the pressure, the lower slider 4 slides relative to the eye screw 2 in the first horizontal direction, thereby adjusting the tilt angle of the eye screw 2 in the first horizontal direction. Similarly, the upper sliding groove and the eye screw 2 are slidably connected in the second horizontal direction, allowing the relative position of the eye screw 2 and the upper slider 5 to be adjusted in the second horizontal direction. Rotating the upper spherical nut 9 causes the spherical surface at the top of the upper spherical nut 9 to press against the ball socket at the bottom of the upper slider 5. Under the pressure, the upper slider 5 slides relative to the eye screw 2 in the second horizontal direction, thereby adjusting the tilt angle of the eye screw 2 in the second horizontal direction.

[0021] Furthermore, a locking washer 10 is provided between the top of the lower spherical nut 8 and the bottom of the upper spherical nut 9. The locking washer 10 locks the lower spherical nut 8 and the upper spherical nut 9 respectively, preventing them from loosening under the influence of external vibration and other factors.

[0022] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0023] Example 3: This embodiment discloses a sliding cone adaptive adjustment mechanism for the upper locking of the landing leg, which is optimized based on embodiment 1 or 2, such as... Figure 1As shown, the locking and limiting component 3 includes a limiting pin and a limiting plate. The limiting plate is fixedly installed on the base 1. The bottom end of the lifting eye screw 2 is provided with a connecting hole. The limiting pin passes through the connecting hole and the base 1. The top of the limiting plate is provided with a limiting hook to tighten the limiting pin.

[0024] The bottom of the limiting plate is connected to the connecting holes on the base 1 via at least two sets of connecting pins, thereby achieving the fixed installation of the limiting plate on the base 1. The limiting hook at the top of the limiting plate is used to tighten the limiting pin at the bottom of the eye bolt 2 downwards, thereby achieving convenient fixation of the eye bolt 2.

[0025] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0026] Example 4: This embodiment discloses a sliding cone adaptive adjustment method for a landing leg upper lock, implemented using the sliding cone adaptive adjustment mechanism described in any one of embodiments 1-3, and includes the following steps: Step 1: Place the slide block on the outside of the eye bolt 2, put the lower slide block 4 on the eye bolt 2, and adjust the lower slide block 4 to the elevation position along the axis of the eye bolt 2 to temporarily fix the lower slide block 4; thread the lower spherical nut 8 on the eye bolt 2, rotate the lower spherical nut 8 to make the spherical surface at the bottom of the lower spherical nut 8 fit tightly with the ball socket at the top of the lower slide block 4; Step 2: Install the upper spherical nut 9 on the external thread of the eye bolt 2, install the upper slider 5 on the top of the upper spherical nut 9, and adjust the upper slider 5 to the elevation position to temporarily fix the upper slider 5; rotate the upper spherical nut 9 so that the spherical surface at the top of the upper spherical nut 9 fits tightly with the ball socket at the bottom of the upper slider 5. Step 3: Check if the axial tilt angle of the eye bolt 2 meets the standard. If it does, proceed to step 4; if it does not, repeat steps 1 and 2 until the axial tilt angle of the eye bolt 2 meets the standard. Step 4: Secure the base 1 to the body structure, secure the slide to the landing leg, and lock the position of the lifting ring screw 2 by locking limit component 3.

[0027] In step 1 above, by rotating the lower spherical nut 8, the spherical surface presses against the ball socket at the top of the lower slider 4, forcing the lower slider 4 to slide along the first horizontal direction. After the automatic adjustment is completed, it is checked whether the tilt angle of the axis of the lifting eye screw 2 relative to the first direction meets the standard. If it meets the standard, proceed to step 2; if it does not meet the standard, loosen the lower spherical nut 8 and readjust the relative position of the lifting eye screw 2 and the lower slider 4.

[0028] In step 2 above, by rotating the upper spherical nut 9, the spherical surface presses against the ball socket at the bottom of the upper slider 5, forcing the upper slider 5 to slide along the second horizontal direction. After the automatic adjustment is completed, it is checked whether the tilt angle of the axis of the lifting eye screw 2 relative to the second horizontal direction meets the standard. If it meets the standard, proceed to step 3; if it does not meet the standard, loosen the upper spherical nut 9 and readjust the relative position of the lifting eye screw 2 and the upper slider 5.

[0029] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A sliding cone adaptive adjustment mechanism for a landing leg upper lock, comprising a base (1), characterized in that, A lifting eye screw (2) is hinged to the base (1). A locking limiter (3) for locking the position of the lifting eye screw (2) is provided between the base (1) and the lifting eye screw (2). A slide is sleeved on the lifting eye screw (2). The slide and the lifting eye screw (2) are slidably connected in a first horizontal direction and a second horizontal direction that are perpendicular to each other. A sliding ball bearing assembly is provided inside the slide. The sliding ball bearing assembly includes at least one set of sliding parts that slide along the first horizontal direction and the second horizontal direction outside the lifting eye screw (2). A spherical part is provided on one side of the sliding part in rotational contact with the sliding part. The spherical part is threadedly connected to the lifting eye screw (2).

2. The sliding cone adaptive adjustment mechanism for the upper locking of the landing leg according to claim 1, characterized in that, The sliding ball bearing assembly includes a lower sliding ball bearing portion and an upper sliding ball bearing portion. The lower sliding ball bearing portion includes at least one lower sliding part that is slidably connected to the eye screw (2) along a first horizontal direction. The top of the lower sliding part is rotatably contacted with a lower spherical part, and the lower spherical part is threadedly fitted onto the outside of the eye screw (2). The upper sliding ball bearing portion includes at least one upper sliding part that is slidably connected to the eye screw (2) along a second horizontal direction. The bottom of the upper sliding part is rotatably contacted with an upper spherical part, and the upper spherical part is threadedly fitted onto the outside of the eye screw (2).

3. The sliding cone adaptive adjustment mechanism for the upper locking of the landing leg according to claim 2, characterized in that, The lower sliding ball bearing includes a lower slider (4) and a lower spherical nut (8). The lower slider (4) is provided with a sliding groove along the first horizontal direction. The sliding groove is slidably connected to the eye screw (2). The top of the lower slider (4) is provided with a ball socket. The lower spherical nut (8) is threadedly fitted onto the outside of the eye screw (2). The bottom of the lower spherical nut (8) is provided with a spherical surface that rotates and contacts the ball socket.

4. The sliding cone adaptive adjustment mechanism for the upper locking of the landing leg according to claim 3, characterized in that, The upper sliding ball bearing part includes an upper slider (5) and an upper spherical nut (9). The upper slider (5) is provided with an upper sliding groove along the second horizontal direction. The upper sliding groove is slidably connected to the lifting eye screw (2). The bottom of the upper slider (5) is provided with a ball socket. The upper spherical nut (9) is threadedly fitted onto the outside of the lifting eye screw (2). The top of the upper spherical nut (9) is provided with a spherical surface that rotates and contacts the ball socket.

5. The sliding cone adaptive adjustment mechanism for the upper locking of the landing leg according to claim 4, characterized in that, A locking washer (10) is provided between the top of the lower spherical nut (8) and the bottom of the upper spherical nut (9).

6. The sliding cone adaptive adjustment mechanism for the upper locking of the landing leg according to any one of claims 1-5, characterized in that, The locking limit component (3) includes a limit pin and a limit plate. The limit plate is fixedly installed on the base (1). The bottom end of the lifting eye screw (2) is provided with a connecting hole. The limit pin passes through the connecting hole and the base (1). The top of the limit plate is provided with a limit hook to tighten the limit pin.

7. A sliding cone adaptive adjustment method for a landing leg upper lock, implemented based on the sliding cone adaptive adjustment mechanism according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Place the slide block on the outside of the eye screw (2), put the lower slide block (4) on the eye screw (2), and adjust the lower slide block (4) to the elevation position along the axis of the eye screw (2) to temporarily fix the lower slide block (4); thread the lower spherical nut (8) on the eye screw (2), rotate the lower spherical nut (8) so that the spherical surface at the bottom of the lower spherical nut (8) fits tightly with the ball socket at the top of the lower slide block (4); Step 2: Install the upper spherical nut (9) on the external thread of the eye bolt (2), install the upper slider (5) on the top of the upper spherical nut (9), and adjust the upper slider (5) to the elevation position to temporarily fix the upper slider (5); rotate the upper spherical nut (9) so that the spherical surface at the top of the upper spherical nut (9) fits tightly with the ball socket at the bottom of the upper slider (5); Step 3: Check whether the axial tilt angle of the eye bolt (2) meets the standard. If it does, proceed to step 4; if it does not meet the standard, repeat steps 1 and 2 until the axial tilt angle of the eye bolt (2) meets the standard. Step 4: Fix the base (1) to the body structure, fix the slide to the landing leg, and lock the position of the lifting ring screw (2) by locking limit piece (3).

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