Cylindrical launch canister assembly fixture

Abstract

The utility model provides a cylindrical launch canister assembly fixture. The unmanned aerial vehicle bracket unit can enable the unmanned aerial vehicle to move along the longitudinal axis; the launch canister clamping unit clamps a launch canister body; and the launching cylinder circumferential adjusting unit adjusts the circumferential position of the launching cylinder through a gear and rack pair. The lead screw axial propelling unit pushes the adapter from the barrel bottom of the launching barrel to the barrel opening and pulls the connected unmanned aerial vehicle and the adapter from the barrel opening of the launching barrel to the barrel bottom. Friction force between the adapter and the barrel wall of the launching barrel is overcome through axial feeding of the lead screw, the adapter is pushed only through manpower instead of the lead screw mechanism, the problem that the launching barrel cannot be fixed is solved through the launching barrel clamping unit, circumferential rotation of the launching barrel is achieved through the gear and rack pair instead of manpower, and the service life of the launching barrel is prolonged. The alignment of the launch canister and the adapter can be finely adjusted, so that the assembly efficiency and the assembly precision of the launch canister are improved, meanwhile, the physical strength of assembly workers is greatly saved by adopting a mechanical structure, and the assembly labor cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of UAV launch tube assembly, and particularly relates to a cylindrical launch tube assembly fixture. Background Technique

[0002] Using a launch tube to launch a UAV is a widely adopted UAV launch method. During launch, it is necessary to assemble the tube-launched UAV, the launch tube, and the adapter.

[0003] The assembly of the tube-launched UAV launch tube is relatively complex. The existing cylindrical launch tube assembly mainly relies on manual labor to push the adapter into the launch tube. However, during the assembly process of the launch tube, the friction between the adapter and the tube wall is large. At the same time, during the assembly process, it is also necessary to rely on manual labor to adjust the circumferential position of the tube body and the adapter. The assembly is time-consuming and laborious, and the assembly accuracy cannot be guaranteed. At the same time, when relying on manual labor to relatively rotate the launch tube and the adapter, there is no suitable tool and force application point, and the space inside the tube is narrow, making it difficult to rotate, resulting in low assembly efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the existing cylindrical launch tube relies on manual labor to assemble with the UAV adapter, resulting in low assembly efficiency and unable to guarantee the assembly accuracy, and provides a cylindrical launch tube assembly fixture.

[0005] To achieve the above purpose, the technical solution provided by the utility model is:

[0006] A cylindrical launch tube assembly fixture includes a base, a UAV bracket unit, a launch tube clamping unit, a launch tube circumferential adjustment unit, and a lead screw axial propulsion unit;

[0007] The base is used to support the UAV bracket unit, the launch tube clamping unit, the launch tube circumferential adjustment unit, and the lead screw axial propulsion unit;

[0008] The UAV bracket unit is used to support the UAV and realize its movement along the longitudinal axis, and includes a support component and a slide rail component; the support component includes a bracket for supporting the UAV along its longitudinal axis; the slide rail component includes a slide rail arranged along the longitudinal axis of the UAV and a slider that can slide along the slide rail. The slide rail is fixedly connected to the base, and the slider is connected to the bracket;

[0009] The launch tube clamping unit is used to circumferentially clamp the tube body of the cylindrical launch tube, so that the axis of the launch tube is collinear and aligned with the longitudinal axis of the UAV, and the tube mouth of the launch tube is opposite to the tail of the UAV. The launch tube clamping unit includes two clamping rings, and one of the clamping rings can rotate and be fixed relative to the other;

[0010] The circumferential adjustment unit of the launcher tube is used to adjust the circumferential position of the launcher tube, and includes a first driver and a rack and pinion pair. The first driver is installed on the base. The pinion in the rack and pinion pair is sleeved on the output shaft of the first driver to be driven to rotate by the output shaft. The rack in the rack and pinion pair is installed on one of the clamping rings in the launcher tube clamping unit;

[0011] The screw axial propulsion unit is used to push the UAV adapter from the bottom of the launcher tube into the launcher tube and push it to the tube mouth, and to pull the connected UAV and the adapter together from the tube mouth of the launcher tube to the bottom of the tube. It includes a second driver, a screw, a screw nut and a screw support. The screw nut is axially limited and rotates under the drive of the second driver. The screw support is connected to the base and supports the screw. The screw can be connected to the adapter, is circumferentially limited and translates with the rotation of the screw nut.

[0012] Further, the support assembly includes a first bracket and a second bracket arranged along the longitudinal axis of the UAV.

[0013] Further, the support assembly further includes an end limiting plate for limiting the installation position of the UAV on the longitudinal axis and connected to the one of the first bracket and the second bracket that is closer to the head of the UAV.

[0014] Further, the end limiting plate is in the shape of two-thirds of a circular arc.

[0015] Further, the launcher tube clamping unit further includes a rotating shaft and a butterfly quick-release screw assembly. The rotating shaft is connected to one side of the two clamping rings and its axis is the rotation axis of the two clamping rings. The butterfly quick-release screw assembly connects the two clamping rings on the other side of the two clamping rings to clamp the clamped launcher tube.

[0016] Further, the first driver is a hand-operated speed reducer.

[0017] Further, the circumferential adjustment unit of the launcher tube further includes a rotation guiding assembly. The rotation guiding assembly includes a guiding column and a limiting member. The guiding column is fixed to the rack and is arranged parallel to the axis of the launcher tube. The limiting member is installed on the base and is provided with an arc-shaped groove. The center of the arc-shaped groove coincides with the rotation center of the launcher tube, so that: the guiding column is restricted to move in the arc-shaped groove when rotating with the rack.

[0018] Further, the screw axial propulsion unit further includes a guiding sleeve and a T-shaped key. The guiding sleeve is fixed to the screw support and sleeved on the screw. A thrust bearing is installed between the screw nut and the guiding sleeve. The thrust bearing is accommodated in the guiding sleeve. The large end of the T-shaped key is inserted into the axial through groove provided on the screw, and the small end is fixedly connected to the guiding sleeve to realize the relative movement between the screw and the screw nut.

[0019] Further, the second driver is a handwheel. The handwheel is sleeved on the screw and connected to the screw nut.

[0020] Furthermore, the screw rod axial propulsion unit further includes a push rod. One end of the push rod is sleeved on the screw rod, and the other end is connected to the adapter.

[0021] The advantages of the present utility model are as follows:

[0022] For the cylindrical launcher assembly fixture of the present utility model, the UAV bracket unit can support the UAV and realize its movement along the longitudinal axis. The launcher clamping unit circumferentially clamps the barrel of the cylindrical launcher. The launcher circumferential adjustment unit adjusts the circumferential position of the launcher by using a gear-rack pair to circumferentially align the launcher with the adapter. The screw rod axial propulsion unit can push the UAV adapter from the bottom of the launcher barrel into the launcher and push it to the barrel mouth, and pull the connected UAV and adapter together from the barrel mouth of the launcher to the bottom, so as to axially align the launcher with the adapter. Therefore, the present utility model overcomes the friction between the adapter and the barrel wall of the launcher through screw rod axial feeding, replaces the manual pushing of the adapter during the assembly process only by manpower with a screw rod mechanism, solves the problem that the launcher cannot be fixed through the launcher clamping unit, and also replaces the manual circumferential rotation of the launcher only by manpower with a gear-rack pair, and can finely adjust the alignment between the launcher and the adapter, thereby improving the assembly efficiency and assembly accuracy of the launcher, and at the same time, the mechanical structure greatly saves the physical strength of the assembly workers and saves the assembly labor cost. Description of the Drawings

[0023] Through the following description with reference to the drawings, the above and / or other features and advantages of the present utility model will become more readily understandable. The drawings are not drawn to scale, and some features are enlarged or reduced to show the details of specific components. In the drawings:

[0024] Figure 1 is a three-dimensional isometric view of the cylindrical launcher assembly fixture of the present utility model;

[0025] Figure 2 is a three-dimensional isometric view of the UAV bracket unit in the fixture of the present utility model;

[0026] Figure 3 is a three-dimensional isometric view of the launcher clamping unit in the fixture of the present utility model;

[0027] Figure 4 is a three-dimensional isometric view of the launcher circumferential adjustment unit in the fixture of the present utility model;

[0028] Figure 5 is a three-dimensional isometric view of the screw rod axial propulsion unit in the fixture of the present utility model;

[0029] Figure 6 is a sectional three-dimensional isometric view of the screw rod axial propulsion unit in the fixture of the present utility model, in which the screw rod support is omitted.

[0030] In the figure: 1-base; 211-first bracket, 212-second bracket, 22-end limit plate; 31-slide rail; 32-slider; 33-pad; 41-upper clamping ring; 42-lower clamping ring; 43-rotating shaft; 44-butterfly quick-release screw assembly; 45-anti-slip rubber; 51-first driver; 52-gear; 53-rack; 61-guide column; 62-limiting member; 71-second driver; 72-screw, 721-axial through groove; 73-screw nut; 74-screw support; 75-guide sleeve; 76-T-key; 77-thrust bearing; 78-push rod; 79-rib plate; 100-launching tube. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration, and is not intended to limit the present invention.

[0032] The utility model provides a cylindrical launch tube assembly fixture, which is used to realize the assembly of a tube-launched UAV, a UAV adapter and a cylindrical launch tube, replacing the current operation method of assembling the adapter and the launch tube only by manpower, thereby preparing for the subsequent tube-type launch of the UAV.

[0033] First, the overall reference Figure 1 As an exemplary embodiment of the utility model, a cylindrical launch tube assembly fixture may include a base 1, a UAV bracket unit, a launch tube clamping unit, a launch tube circumferential adjustment unit and a lead screw axial propulsion unit. The base 1 is used to support the UAV bracket unit, the launch tube clamping unit, the launch tube circumferential adjustment unit and the lead screw axial propulsion unit. The UAV bracket unit is used to support the UAV and realize its movement along the longitudinal axis. The launch tube clamping unit is used to circumferentially clamp the barrel of the cylindrical launch tube 100. The launch tube circumferential adjustment unit is used to adjust the circumferential position of the launch tube 100. The lead screw axial propulsion unit is used to realize the back and forth movement of the UAV adapter along the axial direction of the launch tube 100.

[0034] The base 1 can be of any structure and can be an integral component or include multiple components that support each unit one by one. Each component can be designed to include a support plate and multiple legs, as long as it can achieve reliable support for other components and meet the position requirements of these components.

[0035] Recombination Figure 2, the drone bracket unit includes a support assembly and a slide rail assembly. The support assembly includes a bracket for supporting the drone along its longitudinal axis. The bracket is designed according to the arc surface of the drone to fit the outer surface of the drone. One bracket can be provided, especially two brackets are arranged along the longitudinal axis of the drone, namely the first bracket 211 and the second bracket 212. In this way, the drone can be supported more stably.

[0036] In some embodiments, the support assembly further includes an end limit plate 22 for blocking the head of the drone to limit the installation position of the drone on the longitudinal axis and connected to the one of the first bracket 211 and the second bracket 212 that is closer to the head of the drone, and is shown in the figure as connected to the first bracket 211. The end limit plate 22 can especially be in the shape of two-thirds of a circular arc. This structure passing through the center of the drone can ensure stable limiting.

[0037] The slide rail assembly includes a slide rail 31 arranged along the longitudinal axis of the drone and a slider 32 that can slide along the slide rail 31. The slide rail 31 is fixedly connected to the base 1 and can be placed on a cushion block 33 connected to the base 1. The slider 32 is connected to the bracket to slide along the slide rail 31 together with the bracket. A common double-T type slider slide rail can be selected for the moving slide rail assembly. Those of ordinary skill in the art will understand that when two brackets are provided, two sliders are correspondingly provided. The function of the cushion block 33 is to raise the slide rail so that the drone is at the same height as the launch tube. The number of them is not particularly limited. Three are shown in the figure, but this is only an example, as long as it can stably support the slide rail.

[0038] Then in combination with Figure 3 , the launch tube clamping unit clamps the launch tube 100 so that: the axis of the launch tube 100 is collinearly aligned with the longitudinal axis of the drone, and the muzzle of the launch tube 100 is opposite to the tail of the drone. The launch tube clamping unit includes two clamping rings, namely the upper clamping ring 41 and the lower clamping ring 42. One of the clamping rings, that is, the upper clamping ring 41, can rotate and be fixed relative to the other, that is, the lower clamping ring 42. The upper and lower clamping rings are designed to follow the shape of the launch tube according to the outer diameter of the launch tube and are separated from the horizontal dividing surface. In addition, anti-slip rubber sheets 45 can be pasted on the inner circumference where the upper and lower clamping rings contact the launch tube to further ensure the clamping stability of the launch tube.

[0039] In a specific embodiment of the present utility model, the launcher clamping unit further includes a rotating shaft 43 and a butterfly quick-release screw assembly 44. The rotating shaft 43 is connected to one side of the two clamping rings, and its axis is the rotation axis of the two clamping rings. A cylindrical pin can be selected as the rotating shaft 43. The butterfly quick-release screw assembly 44 is connected to the two clamping rings in the slots of the radially protruding parts of the two clamping rings on the other side to clamp the clamped launcher 100. When clamping the launcher, first loosen the butterfly quick-release screw assembly 44, then rotate the upper clamping ring 41 around the rotating shaft 43 to open it, then place the launcher on the lower clamping ring 42, and then rotate the upper clamping ring 41 to press it on the launcher. At this time, install the butterfly quick-release screw assembly 44 and tighten it.

[0040] Combined with Figure 4 , the circumferential adjustment unit of the launcher includes a first driver 51 and a gear-rack pair. The first driver 51 is installed on the base 1. The gear 52 in the gear-rack pair is sleeved on the output shaft of the first driver 51 to be driven to rotate by the output shaft. The axis of the output shaft is parallel to the axis of the launcher. The rack 53 in the gear-rack pair is installed on one of the clamping rings in the launcher clamping unit, such as the lower clamping ring 42, which can be clearly seen in Figure 3 . To facilitate manual fine-tuning of the circumferential position of the launcher, the first driver 51 can be selected as a hand-operated speed reducer. The power can be input by manually rotating the end flange of the hand-operated speed reducer, and the power is transmitted to the gear 52 through the transmission shaft of the speed reducer. The gear 52 meshes with the rack 53 installed on the launcher clamping unit. When the gear 52 rotates, it drives the rack 53 to rotate. The rack 53 transmits the power to the connected launcher clamping unit, and the launcher clamping unit then drives the clamped launcher 100 to rotate circumferentially.

[0041] To make the circumferential rotation of the launcher stable, the circumferential adjustment unit of the launcher may further include a rotation guiding assembly. The rotation guiding assembly includes a guiding column 61 and a limiting member 62. The guiding column 61 is fixed to the rack 53 and is arranged parallel to the axis of the launcher 100, as can be clearly seen in Figure 3 . The limiting member 62 is installed on the base 1 and is provided with an arc-shaped groove. The center of the arc-shaped groove coincides with the rotation center of the launcher 100, so that: the guiding column 61 is restricted to move in the arc-shaped groove when rotating with the rack 53. Thus, when the gear-rack pair works, the rotation of the launcher 100 rotating with the guiding column 61 is restricted to only along the arc-shaped groove that coincides with its rotation center, realizing the guiding of the rotation of the launcher, thereby ensuring the adjustment accuracy of the circumferential position of the launcher. In addition, the limiting member 62 can also support the free end of the output shaft of the first driver 51 to improve the strength of the gear-rack pair.

[0042] Now combined with Figure 5 and Figure 6, the lead screw axial propulsion unit is used to push the UAV adapter from the bottom of the launch tube 100 into the launch tube 100 and push it to the tube mouth, and to pull the connected UAV and the adapter together from the tube mouth of the launch tube 100 to the bottom, and includes a second driver 71, a lead screw 72, a lead screw nut 73 and a lead screw support 74. The lead screw nut 73 is axially limited and rotates under the drive of the second driver 71. The lead screw support 74 is connected to the base 1 and supports the lead screw 72. The lead screw support 74 can be plate-shaped and is installed perpendicular to the base 1. To improve the support strength of the lead screw 72, a rib plate 79 can be provided on one side of the lead screw support 74, which can be generally in the structure of a right-angled triangular plate, and the two right-angled sides are respectively connected to the base 1 and the lead screw support 74. The lead screw 72 can adopt a Tr40 lead screw, can be connected to the adapter, is circumferentially limited and translates with the rotation of the lead screw nut 73.

[0043] To achieve that the lead screw nut 73 cannot move axially but only rotate and the lead screw 72 cannot rotate but only move axially, in an exemplary embodiment, the lead screw axial propulsion unit further includes a guide sleeve 75 and a T-shaped key 76.

[0044] The guide sleeve 75 is fixed to, especially welded to, the lead screw support 74 and sleeved on the lead screw 72. A thrust bearing 77 is installed between the lead screw nut 73 and the guide sleeve 75 to realize their relative movement. The guide sleeve 75 can be a hollow stepped shaft. The small-diameter section is closer to the circumferential adjustment unit of the launch tube than the large-diameter section and is connected to the lead screw support 74. The thrust bearing 77 is installed in the large-diameter section. The lead screw nut 73 can be arranged such that one axial end presses the thrust bearing 77 in the guide sleeve 75 and the other end is connected to the second driver 71. That is to say, the lead screw 72 is supported by the lead screw nut 73 and the guide sleeve 75. The thrust bearing 77 is pressed left and right by the lead screw nut 73 and the guide sleeve 75. The inner hole diameter of the thrust bearing 77 is larger than the lead screw and it is suspended in the inner hole of the bearing.

[0045] The large end of the T-shaped key 76 is inserted into the axial through groove 721 provided on the lead screw 72, and the small end is fixedly connected to the guide sleeve 75 to realize the relative movement between the lead screw 72 and the lead screw nut 73. When the second driver 71 works, the lead screw nut 73 is driven to rotate. Since the guide sleeve 75 connected to the lead screw nut 73 through the thrust bearing 77 remains fixed, the lead screw nut 73 will not axially shift. The lead screw 72 is driven to move because of its cooperation with the lead screw nut 73, but the lead screw 72 cannot rotate because of the T-shaped key 76 fixedly connected to the guide sleeve 75, so it can only move axially. At the same time, the T-shaped key 76 slides in the axial through groove 721, and thus the adapter connected to the lead screw 72 is driven to translate.

[0046] To achieve convenient manual propulsion control of the adapter, the second driver 71 can be a handwheel. The handwheel is sleeved on the lead screw 72 and connected to, especially welded to, the lead screw nut 73.

[0047] To facilitate the connection between the lead screw 72 and the adapter, the lead screw axial propulsion unit further includes a push rod 78. One end of the push rod 78 is sleeved on the lead screw 72 and can be positioned with a cylindrical pin, and the other end can be U-shaped and connected to the adapter.

[0048] Next, the working process of the cylindrical launch tube assembly fixture provided by the present utility model will be described:

[0049] Step 1: Adjust the positions of the brackets in the UAV bracket unit. Specifically, slide the two brackets to about one-third and two-thirds of the length of the slide rail respectively, and place the UAV on the brackets so that the front end of the UAV contacts the end limit plate and the fuselage is placed on the brackets.

[0050] Step 2: Place the launch tube on the launch tube clamping unit and clamp the launch tube body. Specifically, place it on the lower clamping ring and fasten the upper clamping ring, and tighten the butterfly screw to make the upper and lower clamping rings clamp the launch tube body.

[0051] Step 3: Start the second driver in the lead screw axial propulsion unit to make the end of the lead screw approach the mouth of the launch tube, and connect the adapter to the lead screw.

[0052] Step 4: Use the lead screw adjustment mechanism to push the adapter from the bottom of the launch tube body and push it to the position of the tube mouth until the upper surface of the adapter is flush with the tube mouth.

[0053] Step 5: Connect the tail of the UAV to the adapter, start the second driver to rotate the lead screw in the reverse direction, so that the lead screw pulls the adapter and the UAV to move from the tube mouth to the bottom of the tube, and observe until the shear pin holes on the adapter are aligned with the shear pin holes on the tube wall.

[0054] Step 6: If the shear pin holes on the adapter are not axially aligned with the shear pin holes on the tube wall, perform axial fine adjustment through the lead screw adjustment mechanism. If the shear pin holes on the adapter are not circumferentially aligned with the shear pin holes on the tube wall, start the first driver to perform circumferential fine adjustment of the launch tube until the shear pin is inserted after alignment, and it is perpendicular to the axis of the launch tube. Thus, the installation of the UAV into the tube is completed.

[0055] As described above, the cylindrical launch tube assembly fixture of the present utility model overcomes the frictional force between the adapter and the tube wall of the launch tube through the axial feed of the lead screw, replaces the manual pushing of the adapter during the assembly process only by manpower with a lead screw mechanism, solves the problem that the launch tube cannot be fixed through the launch tube clamping unit, and also replaces the manual realization of the circumferential rotation of the launch tube only by manpower with a gear-rack pair, and can finely adjust the alignment between the launch tube and the adapter. Thereby, the efficiency and assembly accuracy of the launch tube assembly are improved, and at the same time, the mechanical structure greatly saves the physical strength of the assembly workers and saves the assembly labor cost.

[0056] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the present utility model may be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or replace the corresponding features in other embodiments. The technical solutions obtained through such combination or replacement should also be regarded as being included within the protection scope of the present utility model.

Claims

1. A cylindrical launch tube assembly fixture, characterized in that: It includes a base, a UAV bracket unit, a launch tube clamping unit, a launch tube circumferential adjustment unit and a lead screw axial propulsion unit; The base is used to support the UAV bracket unit, the launch tube clamping unit, the launch tube circumferential adjustment unit and the lead screw axial propulsion unit; The UAV bracket unit is used to support the UAV and realize its movement along the longitudinal axis, and includes a support assembly and a slide rail assembly; the support assembly includes a bracket for supporting the UAV along its longitudinal axis; the slide rail assembly includes a slide rail arranged along the longitudinal axis of the UAV and a slider capable of sliding along the slide rail, the slide rail is fixedly connected to the base, and the slider is connected to the bracket; The launch tube clamping unit is used to circumferentially clamp the barrel of the cylindrical launch tube so that the axis of the launch tube is colinearly aligned with the longitudinal axis of the drone, and the barrel mouth of the launch tube is opposite to the tail of the drone, and the launch tube clamping unit includes two clamping rings, one of which can be rotated and fixed relative to the other; The launch tube circumferential adjustment unit is used to adjust the circumferential position of the launch tube, and includes a first driver and a gear rack pair, the first driver is mounted to the base, the gear in the gear rack pair is sleeved on the output shaft of the first driver to be driven to rotate by the output shaft, and the rack in the gear rack pair is mounted to a clamping ring in the launch tube clamping unit; The screw axial propulsion unit is used to push the UAV adapter from the bottom of the launch tube into the launch tube and push it to the tube mouth, and to pull the connected UAV together with the adapter from the tube mouth to the bottom of the launch tube, and includes a second drive, a screw, a screw nut and a screw support. The screw nut is axially limited and rotates under the drive of the second drive. The screw support is connected to the base and supports the screw. The screw can be connected to the adapter, is circumferentially limited and translates with the rotation of the screw nut.

2. The cylindrical launch tube assembly fixture according to claim 1, characterized in that: The support assembly includes a first bracket and a second bracket arranged along the longitudinal axis of the drone.

3. The cylindrical launch tube assembly fixture according to claim 2, characterized in that: The support assembly further includes an end stopper plate, which is used to limit the installation position of the drone on the longitudinal axis and is connected to the one of the first bracket and the second bracket that is closer to the head of the drone.

4. The cylindrical launch tube assembly fixture according to claim 3, characterized in that: The end limiting plate is in the shape of two-thirds of a circular arc.

5. The cylindrical launch tube assembly fixture according to claim 1 or 2, characterized in that: The launch tube clamping unit also includes a rotating shaft and a butterfly quick-release screw assembly. The rotating shaft is connected to one side of the two clamping rings and its axis is the rotation axis of the two clamping rings. The butterfly quick-release screw assembly connects the two clamping rings on the other side of the two clamping rings to clamp the clamped launch tube.

6. The cylindrical launch tube assembly fixture according to claim 1 or 2, characterized in that: The first driver is a hand-cranked reducer.

7. The cylindrical launch tube assembly fixture according to claim 1 or 2, characterized in that: The circumferential adjustment unit of the launch tube also includes a rotation guide assembly, which includes a guide column and a limit member. The guide column is fixed to the rack and is arranged parallel to the axis of the launch tube. The limit member is installed to the base and has an arc groove. The center of the arc groove coincides with the rotation center of the launch tube, so that: the guide column is restricted to move in the arc groove when rotating with the rack.

8. The cylindrical launch tube assembly fixture according to claim 1 or 2, characterized in that: The screw axial propulsion unit also includes a guide sleeve and a T-key, the guide sleeve is fixed to the screw support and is sleeved on the screw, a thrust bearing is installed between the screw nut and the guide sleeve, the thrust bearing is accommodated in the guide sleeve, the large end of the T-key is inserted into the axial through groove set on the screw, and the small end is fixedly connected to the guide sleeve to realize the relative movement of the screw and the screw nut.

9. The cylindrical launch tube assembly fixture according to claim 8, characterized in that: The second driver is a hand wheel, which is sleeved on the lead screw and connected to the lead screw nut.

10. The cylindrical launch tube assembly fixture according to claim 1 or 2, characterized in that: The lead screw axial propulsion unit also includes a push rod, one end of which is sleeved on the lead screw and the other end of which is connected to an adapter.

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