Automatic locking device for space launch pad rotary platform

Abstract

The application discloses an automatic locking device of a space launch tower rotary platform and belongs to the technical field of space launch towers. The automatic locking device comprises a locking rod, a locking hook, a first limiting piece, a return device, a power device and a second limiting piece. The locking rod is fixedly connected with the rotary platform. The locking hook is rotatably connected with the space launch tower through a shaft core. The first limiting piece is fixedly connected with the space launch tower and is used for limiting the rotation range of the locking hook so that the locking hook rotates between a set locking position and an unlocking position. One end of the return device is hingedly connected with the space launch tower, and the other end of the return device is hingedly connected with the locking hook. The return device can drive the locking hook to rotate from the locking position to the unlocking position. The power device is fixedly connected with the space launch tower. The second limiting piece is located above the locking hook, and one end of the second limiting piece is connected with the power device, and the other end of the second limiting piece extends downward. The automatic locking device of the space launch tower rotary platform realizes automatic locking and remote unlocking of the rotary platform.

Description

Technical Field

[0001] The invention belongs to the technical field of space launch towers, and in particular relates to an automatic locking device for a rotary platform of a space launch tower. Background Art

[0002] The tower work platform is a crucial component of the space launch tower, used for docking, installation, and removal of slings for spacecraft sub-stages, as well as inspection and testing of various equipment and instruments. The slewing platform is a structural form of the work platform. Installed on one side of the launch tower, the slewing platform's two symmetrical structures close together to encircle the rocket body when in use. When not in use, a drive mechanism opens the two symmetrical structures, freeing up space for the rocket body and launch drift. The slewing platform's locking mechanism secures the platform in place after opening and closing.

[0003] like Figure 1 and Figure 2 As shown, the existing slewing platform locking device consists of a cylinder 1, a latch holder 2, and a latch 3. The latch 3 is fixed to the cylinder rod of the cylinder 1 fixed to the space launch tower, and the latch holder 2 is fixed to the slewing platform. When the slewing platform is opened, the cylinder 1 drives the latch 3 into the latch holder 2 to lock the slewing platform. Before closing, the slewing platform must be unlocked from the space launch tower. At this time, the cylinder 1 in the slewing platform locking device drives the latch 3 to retract, separating the latch 3 from the latch holder 2, completing the unlocking. After the two symmetrical structures on the slewing platform rotate to the closed position, the latch 3 in the other slewing platform locking device aligns with the pin hole in the latch holder 2. The cylinder 1 drives the latch 3 into the pin hole in the latch holder 2, completing the locking of the slewing platform during closing. When the slewing platform needs to be unlocked from the closed state to the open state, the cylinder 1 drives the latch 3 to retract, separating the latch 3 from the latch holder 2.

[0004] Existing locking devices are designed in the form of a combination of a latch and a latch seat. The latch and the pin hole on the latch seat must be precisely aligned. However, achieving high-precision alignment is difficult on large space launch towers due to the influence of wind loads and vibration loads. Therefore, at the work site, when the slewing platform is opened and closed, at least one observer is required to check whether the pin holes are aligned and manually control the precise positioning of the slewing platform, which makes it difficult to achieve remote automatic operation of the slewing platform locking. Summary of the Invention

[0005] In view of this, the present invention provides an automatic locking device for a rotating platform of a space launch tower, which solves the problem that the existing rotating platform is locked by matching the pin hole of the pin and the pin seat, which requires high docking accuracy and is difficult to achieve remote automatic operation.

[0006] The present invention adopts the following technical solutions:

[0007] An automatic locking device for a rotating platform of a space launch tower, comprising a locking rod, a locking hook, a first limiting member, a return device, a power device, and a second limiting member;

[0008] The locking rod is fixedly connected to the rotary platform;

[0009] The locking hook is rotatably connected to the space launch tower via an axis;

[0010] The first limiting member is fixedly connected to the space launch tower, and the first limiting member is used to limit the rotation range of the locking hook so that it rotates between a set locking position and an unlocking position;

[0011] One end of the return device is hinged to the space launch tower, and the other end is hinged to the lock hook, and the return device can drive the lock hook to rotate from the locked position to the unlocked position;

[0012] The power unit is fixedly connected to the space launch tower;

[0013] The second limiting member is located above the locking hook, and one end of the second limiting member is connected to the power device, and the other end extends downward;

[0014] When the locking rod rotates with the rotating platform, it can push the locking hook to rotate from the unlocking position to the locking position, and when the locking hook rotates from the unlocking position to the locking position, it can lift the second limiting member. When the locking hook rotates to the locking position, the locking hook hooks the locking rod, and the lifted second limiting member automatically falls down to prevent the locking hook from rotating toward the unlocking position.

[0015] Furthermore, when the locking rod is locked, a vertical distance between the axis of the locking rod and the axis of the core shaft is smaller than a vertical distance between the axis of the second limiting member and the axis of the core shaft.

[0016] Furthermore, the return device is provided with a first spring;

[0017] When the lock hook rotates from the unlocking position to the locking position, the first spring is compressed;

[0018] The return device releases the elastic force of the compressed first spring to drive the lock hook to rotate from the locking position to the unlocking position.

[0019] Furthermore, the locking hook is provided with an inclined surface and a groove;

[0020] When the locking hook lifts the second limiting member, the second limiting member slides from the bottom end of the inclined surface to the top end of the inclined surface;

[0021] When the locking hook rotates to the locking position, the lifted limiting member automatically falls into the groove from the top end of the inclined surface.

[0022] Furthermore, a second spring is provided at one end of the second limiting member connected to the power device;

[0023] When the second limiting member is lifted, the second spring is compressed.

[0024] Furthermore, the power device is an oil cylinder;

[0025] One end of the second limiting member is connected to the oil cylinder;

[0026] When the oil cylinder is powered on, the cylinder rod of the oil cylinder retracts and can lift the fallen second limiting member to a height that is disengaged from the locking hook.

[0027] Furthermore, the second limiting member includes a sleeve and a locking pin;

[0028] The sleeve is coaxially slidably sleeved on the outer side of the cylinder rod, and the inner cavity of the sleeve is provided with a flange that can be hooked with the end of the cylinder rod;

[0029] One end of the lock pin is fixedly connected to the sleeve, and the other end extends downward;

[0030] The second spring is sleeved on the outside of the sleeve, with one end abutting against the oil cylinder and the other end abutting against the outer wall of the sleeve;

[0031] When the cylinder rod is retracted, the sleeve is pulled upward by the hooking of the flange and the end of the cylinder rod, so as to lift the fallen locking pin until it is disengaged from the locking hook.

[0032] Furthermore, it also includes a first proximity switch;

[0033] The first proximity switch is used to detect whether the cylinder rod is retracted.

[0034] Furthermore, a screw extending radially along the sleeve is provided on the outer wall of the sleeve near one end of the locking hook;

[0035] When the cylinder rod retracts, the screw moves upward along with the sleeve and is detected by the first proximity switch.

[0036] Furthermore, it also includes a second proximity switch;

[0037] The second proximity switch is used to detect whether the lock hook is rotated to the locking position.

[0038] Beneficial effects:

[0039] 1. The locking rod is fixedly connected to the rotating platform; the locking hook is rotatably connected to the space launch tower through the shaft core; the first limiting member is fixedly connected to the space launch tower, and the first limiting member is used to limit the rotation range of the locking hook so that it rotates between the set locking position and the unlocking position; one end of the return device is hinged to the space launch tower, and the other end is hinged to the locking hook, and the return device can drive the locking hook to rotate from the locking position to the unlocking position; the power unit is fixedly connected to the space launch tower; the second limiting member is located above the locking hook, and one end of the second limiting member is connected to the power unit and the other end extends downward; the locking rod can push the locking hook to rotate from the unlocking position to the locking position when the rotating platform rotates, and the second limiting member can be lifted when the locking hook rotates from the unlocking position to the locking position. When the locking hook rotates to the locking position, the locking hook hooks the locking rod, and the lifted second limiting member automatically falls to prevent the locking hook from rotating toward the unlocking position.

[0040] In this way, after the slewing platform is opened into place, the slewing platform can be automatically locked without the need for high-precision pin-hole docking; moreover, when unlocking, it is only necessary to remotely control the second limit member to lift up. After unlocking, the remote-controlled power device lowers the second limit member to wait for the next automatic locking, thus realizing remote operation of unlocking the slewing platform.

[0041] 2. In the traditional rotary platform locking device, the pin and the pin seat cooperate with each other, and the force is concentrated. The cylinder rod directly bears the huge shear force. In order to make the force on the cylinder rod more balanced, a guide assembly is set in the extension direction of the cylinder rod. This leads to an increase in the cylinder stroke and the need to use a cylinder with a larger rod diameter. The corresponding other components also need to be increased in size, making the traditional rotary platform locking device occupy a large space.

[0042] In the automatic locking device of the rotating platform proposed in the present invention, the second limit member connected to the power device will not directly bear the huge shear force, and because the distance between the axial direction of the locking rod and the axis of the shaft core is smaller than the distance between the second limit member and the shaft core when the locking rod is locked, when the rotating platform is subjected to external forces such as vibration loads and wind loads, causing the locking rod to apply a torque to the lock hook to rotate toward the unlocked position, the force exerted by the lock hook on the second limit member will be smaller than the force exerted by the locking rod on the lock hook, and thus the size of the power device can be reduced, thereby reducing the space occupied by the rotating platform locking device and making it easier to install and debug.

[0043] 3. The return mechanism is equipped with a first spring. When the lock hook rotates from the unlocked position to the locked position, the first spring is compressed. The return mechanism releases the elastic force of the compressed first spring to drive the lock hook from the locked position to the unlocked position. This eliminates the need for a separate power unit to control the rotation of the lock hook, making the automatic locking device of the rotary platform more energy-efficient, compact, and reliable.

[0044] 4. The lock hook is provided with an inclined surface and a groove. When the lock hook lifts the second limiting piece, the second limiting piece slides from the bottom end of the inclined surface to the top end of the inclined surface; when the lock hook rotates to the locking position, the lifted limiting piece falls from the top end of the inclined surface into the groove.

[0045] 5. A second spring is provided at one end of the second limit member connected to the power device. When the second limit member is lifted, the second spring is compressed. In this way, the second spring can apply a downward elastic force to the second limit member, making the falling action of the second limit member more reliable.

[0046] 6. The locking device includes a first proximity switch, which can detect whether the cylinder rod is retracted, thereby improving the reliability of the locking device.

[0047] 7. The locking device includes a second proximity switch, which can detect whether the lock hook is rotated to the locking position, further improving the reliability of the locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural diagram of a conventional rotary platform locking device;

[0049] Figure 2 yes Figure 1 A top view of

[0050] Figure 3 This is a schematic structural diagram of the automatic locking device of the rotary platform provided by the present invention;

[0051] Figure 4 yes Figure 3 Schematic diagram of the connection between the second stopper and the cylinder rod;

[0052] Figure 5 yes Figure 3 Schematic diagram of the state when the middle locking rod and the locking hook are separated or the locking rod and the locking hook just make contact;

[0053] Figure 6 yes Figure 3 Schematic diagram of the status when the mid-slewing platform is locked.

[0054] Among them, 1-cylinder, 2-latch seat, 3-latch, 4-power device, 401-first flange, 5-second spring, 6-rotating platform, 7-lock hook, 8-lock rod, 9-second limiter, 901-lock pin, 902-sleeve, 902A-second flange, 903-annular protrusion, 10-groove, 11-return device, 12-first proximity switch, 13-second proximity switch, 14-first mounting seat, 15-screw, 16-rubber pad, 17-shaft core, 18-second mounting seat, 19-limit rod, 20-guide groove, 201-first end, 202 second end. DETAILED DESCRIPTION

[0055] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0056] Example 1:

[0057] First of all, it should be noted that the locking of the rotating platform 6 in the closed state and the open state is performed by locking devices installed at different positions on the launch tower and the reloading platform 6. The locking principles of these locking devices are the same. This embodiment takes the locking in the open state of the reloading platform as an example for explanation.

[0058] like Figures 3 to 6 As shown, an automatic locking device for a rotating platform of a space launch tower comprises a locking rod 8, a locking hook 7, a first limiting member, a return device 11, a power device 4, and a second limiting member 9, wherein:

[0059] The locking rod 8 is fixedly connected to the rotary platform 6 through the second mounting seat 18; the locking hook 7 is rotatably connected to the first mounting seat 14 fixedly mounted on the space launch tower through the shaft core 17 (that is, the locking hook 7 can rotate around the axis of the shaft core 18); the first limiting member is fixed to the first mounting seat 14, and the first limiting member is used to limit the rotation range of the locking hook 7, that is, to limit the locking hook 7 to the locking position ( Figure 6 The position of the middle lock hook 7 is from the locked position) to the unlocked position ( Figure 5 The position of the middle lock hook 7 is the unlocking position), that is, the two limit positions limited by the first limit member are respectively the locking position and the unlocking position; one end of the return device 11 is hinged to the first mounting seat 14, and the other end is hinged to the lock hook 7. The return device 11 can drive the lock hook 7 to rotate from the locking position to the unlocking position; the power device 4 is fixed on the first mounting seat 14; the second limit member 9 is located above the lock hook 7, and one end of the second limit member 9 is connected to the power device 4, and the other end extends downward.

[0060] refer to Figure 5 and Figure 6 When the slewing platform 6 needs to be locked, the slewing platform 6 rotates counterclockwise. The locking rod 8 rotates with the slewing platform 6, pushing the lock hook 7 from the unlocked position to the locked position. When the lock hook 7 rotates from the unlocked position to the locked position, it can lift the second limiter 9 (recorded as the first lift). When the lock hook 7 rotates to the locked position, the lock hook 7 hooks the locking rod 8, and the lifted second limiter 9 automatically drops (recorded as the first drop), preventing the lock hook 7 from rotating toward the unlocked position. In addition, a rubber pad 16 for buffering is provided on the side of the first mounting seat 14 opposite the slewing platform 6. That is, when the locking rod 8 of the slewing platform 6 approaches the lock hook 7, the rubber pad 16 can prevent the slewing platform 6 from generating a large impact with the first mounting seat 14.

[0061] When the locking rod 8 of the slewing platform 6 needs to be unlocked, the power unit 4 can be remotely controlled to lift the second limiting member 9 upward (referred to as the second lift) to a height at which it disengages from the locking hook 7. At this point, the locking hook 7 no longer has a locking effect on the locking rod 8. The slewing platform 6 can then be driven by the driving device to rotate clockwise until it disengages from the locking hook 7. Simultaneously, the locking hook 7 can be rotated from the locked position to the unlocked position by the return device 11. After the slewing platform 6 is unlocked, the power unit 4 can be remotely controlled to lower the second limiting member 9 (referred to as the second lowering) to await the next automatic locking.

[0062] It is worth noting that the first lifting mentioned above is the upward movement of the second limit member 9 due to the lifting effect of the locking hook 7 (the second limit member 9 can move upward relative to the power device 4), the second lifting is the remote control of the power device 4 to move the second limit member 9 upward, the first drop mentioned above can be caused by the second limit member 9 due to gravity, elastic force (so that the second limit member 9 can compress the spring to form an elastic force when it is lifted), or the combined force of gravity and elastic force, and the second drop mentioned above is the second lifting of the second limit member 9, and the power device 4 controls the second limit member 9 to drop. In this embodiment, the first lifting, first dropping, second lifting, and second dropping of the second limit member 9 are defined as a working cycle of the second limit member 9.

[0063] In this way, after the slewing platform 6 is opened into place, the slewing platform 6 can be automatically locked without the need for high-precision pin-hole docking; moreover, when unlocking, it is only necessary to remotely control the second limit member 9 to lift (corresponding to the second lifting mentioned above). After unlocking, the second limit member 9 is remotely controlled to fall (corresponding to the second falling mentioned above) to wait for the next automatic locking, thereby realizing remote operation of unlocking the slewing platform 6.

[0064] Specifically, the first limiting member is a limiting rod 19, the axis of which is parallel to the axis of the shaft core 17. A guide groove 20 is provided on the side of the locking hook 7. When the locking hook 7 rotates around the shaft core 17 at different angles, different portions of the guide groove 20 contact the outer circumference of the limiting rod 19. The guide groove 20 has two limiting ends along the rotation direction of the locking hook 7: a first end 201 and a second end 202. When the locking hook 7 rotates counterclockwise around the shaft core 17 until the first end 201 abuts the outer circumference of the limiting rod 19, the limiting rod 19 prevents the locking hook 7 from rotating further counterclockwise. When the locking hook 7 rotates clockwise until the second end 202 abuts the limiting rod 19, the limiting rod 19 prevents the locking hook 7 from rotating further clockwise. In this embodiment, when the second end 202 abuts the limiting rod 19, the locking hook 7 is in the unlocked position, and when the first end 201 abuts the limiting rod 19, the locking hook 7 is in the locked position.

[0065] Moreover, in the locked state, the vertical distance between the axis of the locking rod 8 and the axis of the shaft core 17 is smaller than the vertical distance between the axis of the second limiting member 9 and the axis of the shaft core 17. Thus, when the slewing platform 6 is subjected to external forces such as vibration loads and wind loads, causing the locking rod 8 to apply a torque to the lock hook 7 to rotate toward the unlocked position, the force exerted by the lock hook 7 on the second limiting member 9 is smaller than the force exerted by the locking rod 8 on the lock hook 7. Because the load exerted by the lock hook 7 is smaller than when the second limiting member 9 directly bears the force exerted by the lock hook 7 (i.e., the load on the power device 4 connected to the second limiting member 9 is correspondingly reduced), the size of the second limiting member 9 can be reduced. Accordingly, the size of the power device 4 connected to the second limiting member 9 can also be reduced accordingly, thereby reducing the space occupied by the locking device of the slewing platform 6 and making it easier to install and debug.

[0066] More specifically, the return device 11 is equipped with a first spring. When the lock hook 7 rotates from the unlocked position to the locked position, the first spring is compressed. The return device 11 releases the elastic force of the compressed first spring to drive the lock hook 7 from the locked position to the unlocked position. This eliminates the need for an additional power source to control the rotation of the lock hook 7, making the automatic locking device of the slewing platform 6 more energy-efficient, compact, and reliable.

[0067] Furthermore, the lock hook 7 is provided with an inclined surface and a groove 10. When the lock hook 7 lifts the second limiting member 9, the second limiting member 9 slides from the bottom end of the inclined surface to the top end of the inclined surface. When the lock hook 7 rotates to the locked position, the lifted second limiting member 9 falls from the top end of the inclined surface into the groove 10. This design structure is simple and ensures that the second limiting member reliably limits the lock hook 7. It is understandable that in other possible embodiments, the lock hook 7 may not be provided with an inclined surface and a groove 10. In this case, the end of the second limiting member 9 that contacts the lock hook 7 may be provided with a spherical end. When the second limiting member 9 is lifted, the spherical end slides along the upper end surface of the lock hook 7. When the lock hook 7 rotates to the locked position, the lifted second limiting member 9 falls from the upper end surface of the lock hook 7 and abuts against the side surface of the lock hook 7.

[0068] In this embodiment, referring to Figure 3 and Figure 4, the power device 4 is a cylinder, one end of the second limit member 9 is connected to the cylinder rod of the cylinder, and the end of the second limit member connected to the power device 4 is provided with a second spring 5. When the cylinder is powered on, the cylinder rod retracts, compresses the second spring 5 and drives the second limit member to move upward (corresponding to the second lifting mentioned above) until it is disengaged from the lock hook 7. Specifically, the second limit member 9 includes a locking pin 901 and a sleeve 902. The sleeve 902 is coaxially slidably sleeved on the outside of the cylinder rod, and the end of the cylinder rod extending outward is provided with an annular first flange 401. The inner cavity of the sleeve 902 facing away from the locking pin 901 is provided with an annular second flange 902A. In the locked state, the first flange 401 is hooked with the second flange 902A. One end of the locking pin 901 is fixed to the sleeve 902, and the other end extends downward toward the lock hook 7. The second spring is sleeved on the outside of the sleeve 902, and one end abuts against the cylinder, and the other end abuts against the annular outer wall of the sleeve 902. shaped protrusion 903 abuts, and when the remote-controlled oil cylinder retracts the cylinder rod (corresponding to the second lifting mentioned above), the sleeve 16 is pulled upward by the hooking of the first flange 401 and the second flange 902A, so as to lift the fallen locking pin 901 until it is disengaged from the locking hook 7, and the second spring 5 is compressed at this time; when the remote-controlled oil cylinder extends the cylinder rod, the second spring 5 can apply a downward elastic force to the locking pin 901, so that the action of the locking pin 901 falling (corresponding to the second falling) is more reliable. Similarly, when the locking pin 901 falls for the first time, the spring 5 can also play the same role.

[0069] Example 2

[0070] On the basis of Example 1, a screw 15 extending radially along the sleeve 902 is provided on the outer wall of one end of the sleeve 902 close to the lock hook 7, and a first proximity switch 12 located above the screw 15 is installed on the first mounting seat 14. When the cylinder rod retracts, the screw 15 moves upward with the sleeve 902 and is detected by the first proximity switch 12 to detect whether the cylinder rod is retracted.

[0071] Moreover, a second proximity switch 13 is installed on the first mounting seat 14 and is located above the lock hook 7. The second proximity switch 13 is used to detect whether the lock hook 7 is rotated to the locking position. Specifically, when the lock hook 7 is rotated to the locking position, it is within the detection range of the second proximity switch 13. When the lock hook 7 is rotated to other angular positions, it is outside the detection range of the second proximity switch 13.

[0072] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic locking device for a rotating platform of a space launch tower, characterized in that: It includes a locking rod, a locking hook, a first limiting member, a return device, a power device and a second limiting member; The locking rod is fixedly connected to the rotary platform; The locking hook is rotatably connected to the space launch tower via an axis; The first limiting member is fixedly connected to the space launch tower, and the first limiting member is used to limit the rotation range of the locking hook so that it rotates between a set locking position and an unlocking position; One end of the return device is hinged to the space launch tower, and the other end is hinged to the lock hook, and the return device can drive the lock hook to rotate from the locked position to the unlocked position; The power unit is fixedly connected to the space launch tower; The second limiting member is located above the locking hook, and one end of the second limiting member is connected to the power device, and the other end extends downward; When the locking rod rotates with the rotating platform, it can push the locking hook to rotate from the unlocking position to the locking position, and when the locking hook rotates from the unlocking position to the locking position, it can lift the second limiting member. When the locking hook rotates to the locking position, the locking hook hooks the locking rod, and the lifted second limiting member automatically falls down to prevent the locking hook from rotating toward the unlocking position.

2. The automatic locking device for the rotary platform of a space launch tower according to claim 1, characterized in that: When the locking rod is locked, a vertical distance between the axis of the locking rod and the axis of the shaft core is smaller than a vertical distance between the axis of the second limiting member and the axis of the shaft core.

3. The automatic locking device for the rotary platform of a space launch tower according to claim 1, characterized in that: The return device is provided with a first spring; When the lock hook rotates from the unlocking position to the locking position, the first spring is compressed; The return device releases the elastic force of the compressed first spring to drive the lock hook to rotate from the locking position to the unlocking position.

4. The automatic locking device for a rotary platform of a space launch tower according to claim 1, characterized in that: The locking hook is provided with an inclined surface and a groove; When the locking hook lifts the second limiting member, the second limiting member slides from the bottom end of the inclined surface to the top end of the inclined surface; When the locking hook rotates to the locking position, the lifted limiting member automatically falls into the groove from the top end of the inclined surface.

5. The automatic locking device for the rotary platform of a space launch tower according to claim 1, characterized in that: A second spring is provided at one end of the second limiting member connected to the power device; When the second limiting member is lifted, the second spring is compressed.

6. The automatic locking device for the rotary platform of a space launch tower according to claim 5, characterized in that: The power device is an oil cylinder; One end of the second limiting member is connected to the oil cylinder; When the oil cylinder is powered on, the cylinder rod of the oil cylinder retracts and can lift the fallen second limiting member to a height that is disengaged from the locking hook.

7. The automatic locking device for the rotary platform of a space launch tower according to claim 6, characterized in that: The second limiting member includes a sleeve and a locking pin; The sleeve is coaxially slidably sleeved on the outer side of the cylinder rod, and the inner cavity of the sleeve is provided with a flange that can be hooked with the end of the cylinder rod; One end of the lock pin is fixedly connected to the sleeve, and the other end extends downward; The second spring is sleeved on the outside of the sleeve, with one end abutting against the oil cylinder and the other end abutting against the outer wall of the sleeve; When the cylinder rod is retracted, the sleeve is pulled upward by the hooking of the flange and the end of the cylinder rod, so as to lift the fallen locking pin until it is disengaged from the locking hook.

8. The automatic locking device for the rotary platform of a space launch tower according to claim 7, characterized in that: Also included is a first proximity switch; The first proximity switch is used to detect whether the cylinder rod is retracted.

9. The automatic locking device for the rotary platform of a space launch tower according to claim 8, characterized in that: A screw extending radially along the sleeve is provided on the outer wall of the sleeve near one end of the locking hook; When the cylinder rod retracts, the screw moves upward along with the sleeve and is detected by the first proximity switch.

10. The automatic locking device for a rotary platform of a space launch tower according to any one of claims 1 to 9, characterized in that: Also included is a second proximity switch; The second proximity switch is used to detect whether the lock hook is rotated to the locking position.

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