Rocket cabin section capable of improving connection reliability

Abstract

The invention provides a rocket cabin section capable of improving connection reliability, and relates to the technical field of rockets, the rocket cabin section comprises a first cabin section, and the first cabin section is provided with a threaded hole; the second bin section is connected with the first bin section, and a communicating hole aligned with the threaded hole is formed in the second bin section; the bolt is in threaded fit with the threaded hole, and at least part of the bolt penetrates through the communicating hole and extends out of the communicating hole; the nut is in threaded fit with the bolt, the nut is located on the portion, extending out of the communicating hole, of the bolt, and the first bin section and the second bin section are connected together through the nut and the bolt; and the self-locking structure is used for locking the bolt and the nut at the same time. Compared with the prior art, the rocket cabin section has the advantages that tight connection of the first cabin section and the second cabin section is guaranteed, the stability and safety of a rocket structure are guaranteed, and the rocket cabin section can still keep good performance in a complex working environment.

Description

Technical Field

[0001] The invention relates to the field of rocket technology, and in particular to a rocket cabin section capable of improving connection reliability. Background Art

[0002] The docking nodes of a rocket refer to specially designed connection points or interfaces in the rocket structure, which are used to connect different rocket components or sections. The docking nodes of a rocket are distributed at key connection points of the entire rocket structure, and their location and number depend on the design of the rocket, the distribution of stages, and the type of payload carried. The design and location selection of these nodes are of great significance in aerospace engineering, directly affecting the structural integrity, operational performance, and efficiency of the implementation of the mission of the rocket.

[0003] In current rocket designs, bolted connections, as the main docking node installation method, face the important challenge of loosening. Since the rocket experiences extreme vibration and high load environments during launch, bolted connections are prone to loosening due to these extreme conditions. This phenomenon may not only affect the structural integrity and safety of the rocket, but may also lead to the failure of the launch mission or serious equipment damage. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present application provides a rocket compartment section that can improve connection reliability.

[0005] The present application provides a rocket compartment segment capable of improving connection reliability, adopting the following technical solution: A rocket module segment capable of improving connection reliability, comprising: A first bin section, wherein the first bin section is provided with a threaded hole; a second bin section, the second bin section being connected to the first bin section, the second bin section being provided with a communicating hole aligned with the threaded hole; A bolt, wherein the bolt is threadedly engaged with the threaded hole, and at least a portion of the bolt passes through the communicating hole and extends out of the communicating hole; a nut, wherein the nut is threadably matched with the bolt, the nut is located at a portion of the bolt extending out of the communicating hole, and the first compartment section and the second compartment section are connected together by the nut and the bolt; and a self-locking structure, the self-locking structure being arranged on the second compartment section, the self-locking structure comprising a first locking structure and a second locking structure, the first locking structure being used to relatively fix the bolt and the second compartment section, and the first locking structure being able to relatively fix the bolt and the second compartment section before the nut is fastened and installed on the bolt; When the nut is tightly installed on the bolt, the nut can be limitedly matched with the second compartment section through the second locking structure, and at least one of the second locking structure and the nut is connected to the first locking structure so that the first locking structure maintains a locking state on the bolt.

[0006] Preferably, a portion of the bolt located in the communicating hole is provided with a limiting groove, a first limiting hole is provided on the second compartment segment, the first limiting hole is communicated with the communicating hole, the first locking structure comprises an inserting portion and a limiting portion, and the limiting portion is movably arranged relative to the second compartment segment; The plug-in portion is movably arranged in the first limiting hole, and the plug-in portion can be switched between a locking position and an unlocking position when moving in the first limiting hole. The plug-in portion is located on a moving path of the limiting portion so as to be able to switch from the unlocking position to the locking position under the drive of the limiting portion; When the plug-in portion is in the unlocked position, the plug-in portion is located outside the limiting groove; When the plug-in portion is in the locking position, part of the plug-in portion is located in the limiting groove, and part of the plug-in portion is located in the first limiting hole.

[0007] Preferably, the limiting groove is arranged around the bolt, and one of the inner wall of the limiting groove and the plug-in part is provided with a protrusion, and the other is provided with an anti-rotation groove cooperating with the protrusion, and when the plug-in part is located in the limiting groove, the protrusion is located in the anti-rotation groove to limit the rotation and / or axial movement of the bolt.

[0008] Preferably, the protrusion is located in the limiting groove; wherein: The protrusion extends along the circumference of the bolt; And / or, the protrusion extends along the central axis direction of the bolt.

[0009] Preferably, a second limiting hole is provided on the second storage section, the second limiting hole is connected with the first limiting hole, the limiting portion is movably provided in the second limiting hole, the central axis of the first limiting hole intersects with the central axis of the second limiting hole, and the plug-in portion and / or the limiting portion are provided with a guide surface so that the limiting portion can push the plug-in portion to switch from the non-locking position to the locking position when the second limiting hole moves.

[0010] Preferably, at least a portion of the limiting portion is threadedly engaged with the second limiting hole.

[0011] Preferably, the first limiting hole is communicated with the outside, so that the plug-in portion can be installed into the first limiting hole from the outside.

[0012] Preferably, a damping member is provided on the inner wall of the first limiting hole and / or the plug-in portion, and the damping member is used to increase the friction force between the plug-in portion and the inner wall of the first limiting hole.

[0013] Preferably, an annular groove is provided on the nut, the symmetry center line of the annular groove coincides with the axis of the nut, the annular groove extends in a direction intersecting the axis of the nut, and the inner wall of the annular groove has a smooth transition; The second locking structure includes a deformable member, the deformable member is relatively fixed to the second compartment section, and when the nut rotates relative to the bolt, the deformable member can be gradually inserted into the annular groove; When the deformable member is inserted into the annular groove, the deformable member is deformed under the pressure of the inner wall of the annular groove, so that the deformable member is clamped with the annular groove.

[0014] Preferably, the annular groove extends away from the axis side of the nut; And / or, at least a portion of the annular groove extends in a direction perpendicular to the axis of the nut.

[0015] The present invention has the following advantages and beneficial effects: In the process of connecting the first compartment section and the second compartment section together, the bolts and nuts provide tightening force for the first compartment section and the second compartment section, so that the first compartment section and the second compartment section are connected together. If the bolts or nuts become loose during use, the first compartment section and the second compartment section will become loose. The present application locks the bolts and nuts through a self-locking structure, thereby avoiding the situation where the bolts or nuts become loose during use, and preventing the first compartment section and the second compartment section from becoming loose, thereby greatly improving the structural integrity and safety of the rocket.

[0016] Since the bolts and nuts are locked by the self-locking structure, they can be tightly combined into a whole. During the rocket launch, even in the face of extreme vibration and high load environments, there will be no relative movement between the bolts and nuts, thus effectively preventing the connection from loosening. This design ensures the tight connection between the first and second compartments, ensures the stability and safety of the rocket structure, and enables it to maintain good performance in a complex working environment.

[0017] On the other hand, the first locking structure fixes the bolt and the second compartment section relative to each other before the nut is tightened and installed on the bolt, which helps prevent the bolt from rotating during the installation of the nut and prevents the threaded fit between the bolt and the first compartment section from being damaged during the assembly of the nut and the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0020] Figure 2 It is the first cross-sectional view of the embodiment of the present application.

[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0022] Figure 4 It is an enlarged schematic diagram of the first structure at the self-locking structure.

[0023] Figure 5 It is a structural schematic diagram of the plug-in part.

[0024] Figure 6 It is a schematic diagram of the bolt structure.

[0025] Figure 7 It is an enlarged schematic diagram of the second structure at the self-locking structure.

[0026] Figure 8 It is a structural schematic diagram of a deformable part.

[0027] Fig. 9 It is an enlarged schematic diagram of the third structure at the self-locking structure.

[0028] Fig.10 It is a structural diagram of the locking structure.

[0029] Fig.11 2 is a first structural schematic diagram of the limiting part.

[0030] Fig.12 2 is a second structural schematic diagram of the limiting part.

[0031] The markings in the figure are: 100, first compartment section; 110, threaded hole; 200, second compartment section; 210, connecting hole; 220, first limiting hole; 221, damping member; 230, second limiting hole; 240, mounting portion; 300, bolt; 310, limiting groove; 311, protrusion; 400, nut; 410, annular groove; 420, snap-fit ​​groove; 421, protrusion; 500, self-locking structure; 510, first locking structure; 511, plug-in portion; 511a, anti-rotation groove; 511b, guide surface; 512, limiting portion; 520, second locking structure; 521, deformation member; 521a, opening; 521b, guide portion; 522, snap-fit ​​portion; 523, support portion; 524, movable portion; 525, groove; 600, cover plate; 700, sealing member. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0033] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] During the launch process, the rocket will experience extreme vibration and high-load environment. The bolts and nuts are prone to self-rotation in this environment, causing the bolts and nuts to move along the central axis of the bolts, and eventually causing looseness between the first and second compartment sections. When looseness occurs between the first and second compartment sections, in the extreme vibration and high-load environment, the first and second compartment sections will vibrate greatly, and collisions will occur between the first and second compartment sections, eventually causing damage to the first or second compartment sections.

[0035] In order to solve the above problems, it is necessary to prevent the bolts and nuts from rotating during use, and it is also necessary to prevent the bolts and nuts from moving along the central axis of the bolts. Therefore, the present application provides a rocket compartment section that can improve the connection reliability. Through the self-locking structure, the bolts and nuts can be locked to ensure that the bolts and nuts will not move along the axial direction of the bolts, thereby effectively preventing the connection between the first compartment section and the second compartment section from loosening.

[0036] The following is combined with Figures 1 to 12 , a rocket compartment segment that can improve connection reliability provided by an embodiment of the present application is described in detail through specific embodiments and application scenarios.

[0037] Reference Figure 1 , Figure 2 A rocket compartment section capable of improving connection reliability includes a first compartment section 100, a second compartment section 200, bolts 300, nuts 400, and a self-locking structure 500. The first compartment section 100 and the second compartment section 200 are connected together by bolts 300 and nuts 400. In some embodiments, the first compartment section 100 and the second compartment section 200 are both annular structures, so there are multiple bolts 300 and nuts 400 distributed along the circumference of the annular structure. Among them, a threaded hole 110 is provided on the first warehouse section 100, and the bolt 300 is threadedly matched with the threaded hole 110. A connecting hole 210 aligned with the threaded hole 110 is provided on the second warehouse section 200. The connecting hole 210 aligned with the threaded hole 110 means that when the first warehouse section 100 and the second warehouse section 200 are connected together, the connecting hole 210 is exactly aligned with the threaded hole 110, and the central axes of the threaded hole 110 and the connecting hole 210 coincide or basically coincide, so that the bolt 300 can pass through the connecting hole 210 and connect with the threaded hole 110.

[0038] Reference Figure 2 , Figure 3At least part of the bolt 300 passes through the connecting hole 210 and extends outside the connecting hole 210. The nut 400 is threadedly engaged with the bolt 300. The nut 400 is located at the part of the bolt 300 extending outside the connecting hole 210. The first warehouse section 100 and the second warehouse section 200 are connected together through the nut 400 and the bolt 300. At least part of the bolt 300 passes through the connecting hole 210 and extends out of the connecting hole 210, which means that the bolt 300 threadedly connected in the threaded hole 110 passes through the inside of the connecting hole 210 and part of the bolt 300 passes out of the connecting hole 210. The self-locking structure 500 includes a first locking structure 510 and a second locking structure 520. The first locking structure 510 is used to relatively fix the bolt 300 and the second compartment section 200, and the first locking structure 510 can relatively fix the bolt 300 and the second compartment section 200 before the nut 400 is tightened and installed on the bolt 300; when the nut 400 is tightened and installed on the bolt 300, the nut 400 can be limitedly matched with the second compartment section 200 through the second locking structure 520, and at least one of the second locking structure 520 and the nut 400 is connected to the first locking structure 510, so that the first locking structure 510 maintains a locked state of the bolt 300. The first locking structure 510 is used to relatively fix the bolt 300 and the second compartment section 200, which means that under the locking action of the first locking mechanism, the relative position of the bolt 300 and the second compartment end can remain unchanged, that is, the bolt 300 cannot rotate relative to the second compartment end or cannot move along the central axis direction of the connecting hole 210; the nut 400 is relatively fixed to the second compartment section 200, which means that the relative position between the nut 400 and the second compartment end remains unchanged, that is, the nut 400 cannot rotate or move relative to the second compartment end. In use, after the bolt 300 is locked by the first locking structure 510, the nut 400 can be installed on the bolt 300. When the nut 400 is installed on the bolt 300, the first locking structure 510 can be locked so that the first locking structure 510 always maintains the locking state of the bolt 300.

[0039] Reference Figure 3 , Figure 4When connecting the first warehouse section 100 and the second warehouse section 200, first screw the bolt 300 into the threaded hole 110, then align the second warehouse section 200 with the first warehouse section 100 and let the second warehouse section 200 gradually approach the first warehouse section 100. In this process, align the connecting hole 210 with the threaded hole 110. As the first warehouse section 100 and the second warehouse section 200 gradually approach each other, the end of the bolt 300 away from the first warehouse section 100 will gradually be inserted into the connecting hole 210 until the second warehouse section 200 and the first warehouse section 100 are docked together. The end of the bolt 300 away from the first warehouse section 100 will pass through the connecting hole 210 to the outside of the connecting hole 210. Finally, screw the nut 400 from the end of the bolt 300 that passes through the connecting hole 210 to the outside of the connecting hole 210. Tightening the nut 400 will connect the first warehouse section 100 and the second warehouse section 200 together.

[0040] Reference Figure 3 , Figure 4 Since the rocket has a very high speed during the launch process, in order to reduce the increase in wind resistance caused by the components protruding from the surface of the rocket, it is necessary to set the nut 400 and the bolt 300 inside the first compartment section 100 and the second compartment section 200. For this purpose, the second compartment section 200 is concave to form a mounting portion 240, and the end of the connecting hole 210 away from the first compartment section 100 is connected to the mounting portion 240. When the bolt 300 penetrates the connecting hole 210, the end of the bolt 300 away from the first compartment section 100 will penetrate into the mounting portion 240. At this time, the nut 400 can be installed on the bolt 300 from the outside, and the bolt 300 can be tightened conveniently. Since the mounting portion 240 is concave on the second compartment section 200, the bolt 300 and the nut 400 will not protrude from the surface of the first compartment section 100 or the second compartment section 200 during the flight of the rocket, and thus will not increase the wind resistance during the flight of the rocket.

[0041] According to an optional embodiment, a limiting groove 310 is provided at a portion of the bolt 300 located in the connecting hole 210, a first limiting hole 220 is provided on the second compartment section 200, the first limiting hole 220 is connected to the connecting hole 210, the first locking structure 510 includes a plug-in portion 511 and a limiting portion 512, the limiting portion 512 is movably arranged relative to the second compartment section 200; the plug-in portion 511 is movably arranged in the first limiting hole 220, and the plug-in portion 511 is arranged in the first limiting hole When moving in the limiting groove 220, it can switch between the locking position and the unlocking position, and the plug-in portion 511 is located on the moving path of the limiting portion 512, so that it can switch from the unlocking position to the locking position under the drive of the limiting portion 512; when the plug-in portion 511 is in the unlocking position, the plug-in portion 511 is located outside the limiting groove 310; when the plug-in portion 511 is in the locking position, part of the plug-in portion 511 is located in the limiting groove 310, and part of the plug-in portion 511 is located in the first limiting hole 220.

[0042] Reference Figure 3 , Figure 4 , wherein the limiting portion 512 is movably arranged relative to the second bin section 200, which means that the limiting portion 512 can rotate and / or move relative to the second bin section 200; the plug-in portion 511 is movably arranged in the first limiting hole 220, which means that the plug-in portion 511 can move in the first limiting hole 220 along the length direction of the first limiting hole 220, and / or the plug-in portion 511 can make a circumferential rotation in the first limiting hole 220. In some embodiments, the plug-in portion 511 can move along the length direction of the first limiting hole 220 and can make a circumferential rotation in the first limiting hole 220. Making a circumferential rotation means that the plug-in portion 511 can rotate along the axis passing through itself. Specifically, the plug-in portion 511 is a cylindrical structure, and the plug-in portion 511 can rotate along its own central axis.

[0043] The plug-in portion 511 is located on the moving path of the limiting portion 512 so as to be able to switch from the unlocked position to the locked position under the drive of the limiting portion 512, which means that the limiting portion 512 can contact the plug-in portion 511 during the movement, and when the limiting portion 512 contacts the plug-in portion 511, the limiting portion 512 can push the plug-in portion 511 to move in the first limiting hole 220, so that the plug-in portion 511 is inserted from outside the communicating hole 210 into the communicating hole 210 and enters the limiting groove 310; It can be understood that when the plug-in portion 511 is inserted into the limiting groove 310, part of the plug-in portion 511 is still in the first limiting hole 220, so that a clamping relationship can be formed between the plug-in portion 511 and the limiting groove 310, so that the bolt 300 cannot move in its axial and / or circumferential direction, that is, the bolt 300 cannot rotate relative to the first compartment section 100, and the bolt 300 cannot move along the central axis direction relative to the first compartment section 100, thereby achieving the purpose of locking the bolt 300.

[0044] Reference Figure 3 , Figure 4 In some embodiments, the first limiting hole 220 is a cylindrical hole, and the central axis of the first limiting hole 220 is a straight line, so that the plug-in portion 511 is not easily stuck when moving in the first limiting hole 220.

[0045] When the limiting portion 512 is moved, the plug-in portion 511 can be pushed to move in the first limiting hole 220, and finally one end of the plug-in portion 511 is inserted into the limiting groove 310, and then the limiting portion 512 is locked by the nut 400, and the nut 400 is locked by the second locking structure 520. Since the limiting portion 512 is locked by the nut 400, the limiting portion 512 cannot move relative to the nut 400, and the nut 400 cannot rotate relative to the limiting portion 512; at the same time, since one end of the plug-in portion 511 is inserted into the limiting groove 310, the bolt 300 cannot rotate relative to the first compartment section 100, and the bolt 300 cannot move along its own central axis direction relative to the second compartment section 200, so that the bolt 300, the nut 400, the plug-in portion 511 and the limiting portion 512 are locked with each other, thereby achieving the effect of locking the bolt 300 and the nut 400. During use, since the bolt 300, the nut 400, the plug-in portion 511 and the limiting portion 512 are locked with each other, there will be no relative movement between the bolt 300 and the nut 400, thereby effectively preventing the first compartment section 100 and the second compartment section 200 from loosening. Among them, the limiting portion 512 is locked by the nut 400, and when the limiting portion 512 cannot move, the plug-in portion 511 will always be inserted into the limiting groove 310. When the limiting portion 512 is inserted into the limiting groove 310, the bolt 300 cannot rotate or move, and the nut 400 cannot rotate under the action of the limiting portion 512, thereby maintaining a stable limiting relationship between the bolt 300, the nut 400, the plug-in portion 511 and the limiting portion 512.

[0046] Reference Figure 4 , Figure 6 According to an optional embodiment, the limiting groove 310 is arranged around the bolt 300, and one of the inner wall of the limiting groove 310 and the plug-in portion 511 is provided with a protrusion 311, and the other is provided with an anti-rotation groove 511a cooperating with the protrusion 311. When the plug-in portion 511 is located in the limiting groove 310, the protrusion 311 is located in the anti-rotation groove 511a to limit the bolt 300 from rotating and / or moving axially. Since the bolt 300 needs to rotate relative to the first compartment section 100 during use, in order to facilitate the insertion of the plug-in portion 511 into the limiting groove 310, the limiting groove 310 is set as an annular groove 410. No matter what angle the bolt 300 is rotated to, the plug-in portion 511 can always be inserted into the limiting groove 310. However, since the limiting groove 310 is an annular groove 410, when the plug-in portion 511 is located in the limiting groove 310, it can only limit the movement of the bolt 300 along its central axis direction, but cannot limit the rotation of the bolt 300. For this reason, refer to Figure 5 , Figure 6 A protrusion 311 is provided on one of the inner wall of the limiting groove 310 and the plug-in portion 511, and an anti-rotation groove 511a is provided on the other. The cooperation between the protrusion 311 and the anti-rotation groove 511a can effectively prevent the bolt 300 from rotating.

[0047] According to an optional embodiment, the protrusion 311 is located in the limiting groove 310; wherein: the protrusion 311 extends along the circumference of the bolt 300; and / or the protrusion 311 extends along the central axis direction of the bolt 300. Since the limiting groove 310 is provided on the bolt 300, if the anti-rotation groove 511a is further provided in the limiting groove 310, it may affect the strength of the bolt 300, so the protrusion 311 is provided in the limiting groove 310 to avoid the situation of further slotting in the limiting groove 310. The protrusion 311 can also be used to increase the strength of the bolt 300, so that the bolt 300 will not be deformed during use. The protrusion 311 extends along the circumference of the bolt 300, which means that the protrusion 311 extends along the circumference of the bolt 300 and is provided for one circle. It can be understood that the protrusion 311 is an annular structure protruding from the inner wall of the limiting groove 310. In some embodiments, a plurality of protrusions 311 may be distributed at intervals along the central axis direction of the bolt 300. It can be understood that the protrusion 311 is located in the limiting groove 310; wherein: the protrusion 311 extends along the circumference of the bolt 300; and the protrusion 311 extends along the central axis direction of the bolt 300, which means that the protrusion 311 extends both along the circumference of the bolt 300 and along the central axis direction of the bolt 300, so that the protrusion 311 forms a grid-like shape in the limiting groove 310; or it means that part of the protrusion 311 extends along the circumference of the bolt 300, and part of the protrusion 311 extends along the central axis direction of the bolt 300.

[0048] Reference Figure 4 , Figure 6 In some embodiments, two limiting grooves 310 are provided on the bolt 300, wherein the protrusion 311 in one limiting groove 310 extends along the circumference of the bolt 300, and the protrusion 311 in the other limiting groove 310 extends along the central axis direction of the bolt 300, and two first limiting holes 220 can be arranged to match this, and each first limiting hole 220 is provided with a plug-in portion 511, wherein the anti-rotation groove 511a on one of the plug-in portions 511 is shaped to match the protrusion 311 extending along the circumference of the bolt 300, and the anti-rotation groove 511a on the other plug-in portion 511 is shaped to match the protrusion 311 extending along the central axis direction of the bolt 300.

[0049] Reference Figure 3 , Figure 4According to an optional embodiment, the second bin section 200 is provided with a second limiting hole 230, the second limiting hole 230 is connected with the first limiting hole 220, the limiting portion 512 is movably provided in the second limiting hole 230, the central axis of the first limiting hole 220 intersects with the central axis of the second limiting hole 230, and the plug-in portion 511 and / or the limiting portion 512 are provided with a guide surface 511b, so that when the limiting portion 512 moves in the second limiting hole 230, the plug-in portion 511 can be pushed to switch from the non-locking position to the locking position. The limiting portion 512 is movably provided in the second limiting hole 230, which means that the limiting portion 512 can move along the length direction of the second limiting hole 230, and the limiting portion 512 can also rotate in the second limiting hole 230. The central axis of the first limiting hole 220 intersects the central axis of the second limiting hole 230, which means that the angle between the central axis of the first limiting hole 220 and the central axis of the second limiting hole 230 is greater than degrees and less than degrees. In some embodiments, the limiting portion 512 is a cylindrical structure, the second limiting hole 230 is a cylindrical hole, and the central axis of the second limiting hole 230 is a straight line.

[0050] The plug-in portion 511 and / or the limiting portion 512 are provided with a guide surface 511b, which means that the plug-in portion 511 is provided with a guide surface 511b or the limiting portion 512 is provided with a guide surface 511b, or the plug-in portion 511 and the limiting portion 512 are provided with a guide surface 511b. In some embodiments, the plug-in portion 511 and the limiting portion 512 are both provided with a guide surface 511b, and the guide surface 511b provided on the plug-in portion 511 and the limiting portion 512 can guide the plug-in portion 511 to move in the first limiting hole 220 when the limiting portion 512 contacts the plug-in portion 511 through the guidance of the guide surface 511b.

[0051] In some embodiments, the central axis direction of the first limiting hole 220 is perpendicular to the central axis direction of the connecting hole 210, and the central axis direction of the second limiting hole 230 is parallel to the central axis direction of the connecting hole 210 and perpendicular to the central axis direction of the first limiting hole 220. Figure 4 As shown, the central axis of the first limiting hole 220 is located in the horizontal plane, the central axis of the second limiting hole 230 is located in the vertical plane, the angle between the guide surface 511b on the plug-in portion 511 and the vertical plane is less than degrees, the guide surface 511b on the limiting portion 512 is a conical surface, and the top angle of the conical surface is less than degrees.

[0052] According to an optional embodiment, at least part of the limiting portion 512 is threadedly matched with the second limiting hole 230. The limiting portion 512 can be fixed in the second limiting hole 230, so that the plug-in portion 511 is pressed against the area between the limiting groove 310 and the limiting portion 512, so that the bolt 300 is locked.

[0053] Reference Figure 3 , Figure 4 According to an optional embodiment, the first limiting hole 220 is connected to the outside, so that the plug-in portion 511 can be installed from the outside into the first limiting hole 220. The first limiting hole 220 is connected to the outside, so that the plug-in portion 511 can be easily installed into the first limiting hole 220 during installation, avoiding the inconvenience of installing the plug-in portion 511, and reducing the manufacturing difficulty of the overall device.

[0054] Specifically, during use, the first bin section 100 and the second bin section 200 are first connected, and the bolt 300 is extended out of the connecting hole 210 away from the end of the first bin section 100. At this time, the plug-in portion 511 is inserted into the first limiting hole 220 through the first limiting hole 220 connected to the outside, and a part of the plug-in portion 511 is inserted into the limiting groove 310, and then the limiting portion 512 can be inserted through the second limiting hole 230. At this time, the limiting portion 512 will push the plug-in portion 511 to press against the limiting groove 310 until the limiting portion 511 is 2 is fixed in the second limiting hole 230. At this time, the bolt 300 is locked by the limiting part 512, so that the bolt 300 cannot rotate or move along its axial direction. Then, the nut 400 can be screwed into the end of the bolt 300 away from the first compartment section 100. When the nut 400 is screwed in, the bolt 300 will not rotate because the bolt 300 is locked, so that the bolt 300 can avoid rotating when the nut 400 is screwed in, and avoid the bolt 300 from being loosened with the first compartment section 100 when the bolt 300 rotates. When the nut 400 is screwed in place, the limiting part 512 is locked by the nut 400, so as to avoid loosening between the limiting part 512 and the second limiting hole 230.

[0055] According to an optional embodiment, the inner wall of the first limiting hole 220 and / or the plug-in portion 511 is provided with a damping member 221, and the damping member 221 is used to increase the friction between the plug-in portion 511 and the inner wall of the first limiting hole 220. In some embodiments, the damping member 221 is provided on the inner wall of the first limiting hole 220, and in other embodiments, the damping member 221 may be provided on the plug-in portion 511 or both the plug-in portion 511 and the first limiting hole 220. Specifically, the damping member 221 is a rubber ring, and the inner diameter of the rubber ring is smaller than the outer diameter of the plug-in portion 511. Thus, when the plug-in portion 511 is inserted into the first limiting hole 220, the plug-in portion 511 can be fixed in the first limiting hole 220 by the rubber ring, so that the installer can control the position of the plug-in portion 511, and it is also convenient to install the plug-in portion 511 in the first limiting hole 220 in advance, and keep the plug-in portion 511 in the first limiting hole 220 by the damping member 221, thereby preventing the plug-in portion 511 from entering the communicating hole 210 before use. In subsequent installation, the plug-in portion 511 can be pushed into the limiting groove 310 by the limiting portion 512.

[0056] Reference Figure 3 , Figure 4 According to an optional embodiment, an annular groove 410 is provided on the nut 400, and the symmetric center line of the annular groove 410 coincides with the axis of the nut 400, and the annular groove 410 extends in a direction intersecting the axis of the nut 400, and the inner wall of the annular groove 410 has a smooth transition; the second locking structure 520 includes a deforming member 521, and the deforming member 521 is relatively fixed to the second compartment section 200, and when the nut 400 rotates relative to the bolt 300, the deforming member 521 can be gradually inserted into the annular groove 410; when the deforming member 521 is inserted into the annular groove 410, the deforming member 521 is deformed under the pressure of the inner wall of the annular groove 410, so that the deforming member 521 is clamped with the annular groove 410. The annular groove 410 extends in a direction intersecting the axis of the nut 400, which means that the annular groove 410 extends in a direction close to the axis of the nut 400 or away from the axis of the nut 400. It can be understood that the deforming member 521 is made of metal. In some embodiments, referring to Figure 7 , Figure 8 The deformable member 521 is fixed in the communicating hole 210. The deformable member 521 is an annular shell structure. An opening 521a is provided at the end of the deformable member 521 located in the annular groove 410 so that the deformable member 521 can be deformed in the annular groove 410. In some embodiments, referring to Figure 3 , Figure 4 The deformable member 521 is fixed on the limiting portion 512 . When the nut 400 presses the limiting portion 512 , the deformable member 521 on the limiting portion 512 can enter the annular groove 410 . At this time, the deformable member 521 is a protrusion 311 structure protruding from the limiting portion 512 .

[0057] In some embodiments, a guide portion 521b is provided at one end of the deformable member 521 facing the nut 400. In some embodiments, the guide portion 521b is located on the inner ring side of the end of the deformable member 521 facing the nut 400. Specifically, the guide portion 521b is a chamfer or fillet provided at the inner ring of the top (close to the end of the nut 400) of the deformable member 521, so as to facilitate the deformation of the deformable member 521 and its insertion into the annular groove 410. When the deformable member 521 is deformed in the annular groove 410, the top position of the deformable member 521 will spread to the surroundings, at which time the guide portion 521b will contact the inner wall of the annular groove 410, and as the deformable member 521 is deformed, the guide portion 521b will slide relative to the inner wall of the annular groove 410, and the guide portion 521b is conducive to the deformation of the deformable member 521 in the annular groove 410 and its insertion into the annular groove 410.

[0058] When the nut 400 is rotated, the deforming piece 521 will gradually enter the annular groove 410. Since the annular groove 410 extends toward / away from the axial side of the nut 400, the direction in which the deforming piece 521 enters the annular groove will be different from the extension direction of the annular groove 410. Since the inner wall of the annular groove 410 has a smooth transition, when the deforming piece 521 contacts the inner wall of the annular groove 410, the deforming piece 521 will be forced to deform and be inserted into the annular groove 410 along the extension direction of the annular groove 410 under the extrusion of the inner wall of the annular groove 410. In this process, a snap-fit ​​structure will be formed between the deforming piece 521 and the inner wall of the annular groove 410, thereby clamping the deforming piece 521 and the annular groove 410.

[0059] According to an optional embodiment, the annular groove 410 extends away from the axis of the nut 400; this causes the deformable member 521 to also extend away from the axis of the nut 400, thereby placing the clamping portion of the deformable member 521 and the annular groove 410 on the outside close to the nut 400. When the nut 400 has a tendency to rotate, the point of action of the friction force between the deformable member 521 and the annular groove 410 is far from the axis of the nut 400, thereby generating a larger force arm opposite to the rotation tendency of the nut 400, thereby enhancing the fixing effect on the nut 400 and preventing the nut 400 from loosening.

[0060] According to an optional embodiment, at least part of the annular groove 410 extends in a direction perpendicular to the axis of the nut 400 ; this can effectively prevent the nut 400 from moving along its axis, thereby improving the fixing effect of the nut 400 .

[0061] Reference Fig. 9 , Fig.10 According to an optional embodiment, the second locking structure 520 includes a clamping portion 522 rotatably disposed on the limiting portion 512 (see Fig.11 ), when the limiting portion 512 is rotated, the clamping portion 522 can be rotated relative to the limiting portion 512 to keep the relative position of the clamping portion 522 and the nut 400 unchanged. The nut 400 is provided with a clamping groove 420 that cooperates with the clamping portion 522, and the clamping structure can be clamped in the clamping groove 420.

[0062] Reference Fig.11 , Fig.12 In some embodiments, the clamping portion 522 includes a supporting portion 523 and a movable portion 524 movably disposed on the supporting portion 523, and an elastic member is disposed between the supporting portion 523 and the movable portion 524 (refer to Fig.12), the movable part 524 can be abutted against the inner wall of the clamping groove 420 through the elastic member, so that the support part 523 is clamped with the clamping groove 420, and the support part 523 is rotatably connected with the limiting part 512. It can be understood that the clamping groove 420 is an annular clamping groove with the axis of the nut 400 as the center line, so that the nut 400 can be clamped with the clamping part 522 when it is rotated to any angle, and a protrusion 421 is provided on one of the inner wall of the clamping groove 420 and the movable part 524, and a groove 525 matched with the protrusion is provided on the other, so that when the movable part 524 is clamped with the clamping groove 420, the nut 400 cannot rotate.

[0063] When connecting the first warehouse section 100 and the second warehouse section 200, screw the bolt 300 into the threaded hole 110, let the end of the bolt 300 away from the first warehouse section 100 pass out of the connecting hole 210, and screw the nut 400 from the end of the bolt 300 that passes out of the connecting hole 210, tighten the nut 400, and then install it into the plug-in part 511 from the first limiting hole 220, and push the plug-in part 511 to move into the limiting groove 310, insert the limiting part 512 from the second limiting hole 230, rotate the limiting part 512 so that the limiting part 512 is gradually tightened in the second limiting hole 230. During this process, the supporting part 523 and the movable part 524 can be directed toward the snap-in groove 420. When the supporting part 523 and the movable part 524 are snap-fitted into the snap-in groove 420, the fixing of the limiting part 512 is completed. The limiting portion 512 and the nut 400 can be fixed together through the support portion 523 and the movable portion 524, so that the nut 400 cannot rotate and the limiting portion 512 cannot move out of the second limiting hole 230, thereby locking the nut 400, the screw rod and the limiting portion 512, so that the first storage section 100 and the second storage section 200 are connected together.

[0064] In some embodiments, in order to improve the sealing performance of the first bin section 100 and the second bin section 200, a cover plate 600 is provided at the connection between the first bin section 100 and the second bin section 200, and a sealing member 700 is provided between the cover plate 600 and the first bin section 100, and between the cover plate 600 and the second bin section 200; the specific sealing member 700 is a sealing rubber. It can be understood that the connection between the first limiting hole 220 and the outside world can be provided at the cover plate 600, so that the cover plate 600 can seal the opening 521a of the first limiting hole 220.

[0065] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rocket compartment section capable of improving connection reliability, characterized in that: include: A first bin section (100), wherein the first bin section (100) is provided with a threaded hole (110); a second bin section (200), the second bin section (200) being connected to the first bin section (100), the second bin section (200) being provided with a communicating hole (210) aligned with the threaded hole (110); a bolt (300), wherein the bolt (300) is threadably matched with the threaded hole (110), and at least a portion of the bolt (300) passes through the communicating hole (210) and extends out of the communicating hole (210); a nut (400), wherein the nut (400) is threadably matched with the bolt (300), the nut (400) being located at a portion of the bolt (300) extending out of the communicating hole (210), and the first compartment section (100) and the second compartment section (200) are connected together by means of the nut (400) and the bolt (300); and a self-locking structure (500), the self-locking structure (500) being arranged on the second compartment section (200), the self-locking structure (500) comprising a first locking structure (510) and a second locking structure (520), the first locking structure (510) being used to relatively fix the bolt (300) and the second compartment section (200), and the first locking structure (510) can relatively fix the bolt (300) and the second compartment section (200) before the nut (400) is tightened and installed on the bolt (300); When the nut (400) is tightly installed on the bolt (300), the nut (400) can be limitedly matched with the second compartment section (200) through the second locking structure (520), and at least one of the second locking structure (520) and the nut (400) is connected to the first locking structure (510) so that the first locking structure (510) maintains a locking state for the bolt (300).

2. A rocket compartment section capable of improving connection reliability according to claim 1, characterized in that: A portion of the bolt (300) located in the communicating hole (210) is provided with a limiting groove (310); a first limiting hole (220) is provided on the second compartment section (200); the first limiting hole (220) is communicated with the communicating hole (210); the first locking structure (510) comprises an inserting portion (511) and a limiting portion (512); the limiting portion (512) is movably arranged relative to the second compartment section (200); The plug-in portion (511) is movably arranged in the first limiting hole (220); the plug-in portion (511) can switch between a locking position and an unlocking position when moving in the first limiting hole (220); the plug-in portion (511) is located on a moving path of the limiting portion (512) so as to be able to switch from the unlocking position to the locking position under the drive of the limiting portion (512); When the plug-in portion (511) is in the unlocked position, the plug-in portion (511) is located outside the limiting groove (310); When the plug-in portion (511) is in the locked position, part of the plug-in portion (511) is located in the limiting groove (310), and part of the plug-in portion (511) is located in the first limiting hole (220).

3. A rocket compartment section capable of improving connection reliability according to claim 2, characterized in that: The limiting groove (310) is arranged around the bolt (300), and one of the inner wall of the limiting groove (310) and the plug-in portion (511) is provided with a protrusion (311), and the other is provided with an anti-rotation groove (511a) cooperating with the protrusion (311). When the plug-in portion (511) is located in the limiting groove (310), the protrusion (311) is located in the anti-rotation groove (511a) to limit the bolt (300) from rotating and / or moving axially.

4. A rocket compartment section capable of improving connection reliability according to claim 3, characterized in that: The protrusion (311) is located in the limiting groove (310); wherein: The protrusion (311) extends along the circumference of the bolt (300); And / or, the protrusion (311) extends along the central axis direction of the bolt (300).

5. A rocket compartment section capable of improving connection reliability according to claim 2, characterized in that: The second storage section (200) is provided with a second limiting hole (230), the second limiting hole (230) is connected with the first limiting hole (220), the limiting portion (512) is movably arranged in the second limiting hole (230), the central axis of the first limiting hole (220) intersects with the central axis of the second limiting hole (230), and the plug-in portion (511) and / or the limiting portion (512) are provided with a guiding surface (511b), so that when the limiting portion (512) moves in the second limiting hole (230), the plug-in portion (511) can be pushed to switch from a non-locking position to a locking position.

6. A rocket compartment section capable of improving connection reliability according to claim 5, characterized in that: At least a portion of the limiting portion (512) is threadably engaged with the second limiting hole (230).

7. A rocket compartment section capable of improving connection reliability according to claim 2, characterized in that: The first limiting hole (220) is in communication with the outside world, so that the plug-in portion (511) can be installed from the outside world into the first limiting hole (220).

8. A rocket compartment section capable of improving connection reliability according to claim 2 or 7, characterized in that: The inner wall of the first limiting hole (220) and / or the plug-in portion (511) is provided with a damping member (221), and the damping member (221) is used to increase the friction force between the plug-in portion (511) and the inner wall of the first limiting hole (220).

9. A rocket compartment section capable of improving connection reliability according to claim 2, characterized in that: The nut (400) is provided with an annular groove (410), the symmetry center line of the annular groove (410) coincides with the axis of the nut (400), the annular groove (410) extends in a direction intersecting the axis of the nut (400), and the inner wall of the annular groove (410) has a smooth transition; The second locking structure (520) comprises a deformable member (521), wherein the deformable member (521) is relatively fixed to the second compartment section (200), and when the nut (400) rotates relative to the bolt (300), the deformable member (521) can be gradually inserted into the annular groove (410); When the deformable member (521) is inserted into the annular groove (410), the deformable member (521) is deformed under the pressure of the inner wall of the annular groove (410), so that the deformable member (521) is clamped with the annular groove (410).

10. A rocket compartment section capable of improving connection reliability according to claim 9, characterized in that: The annular groove (410) extends away from the axis side of the nut (400); And / or, at least a portion of the annular groove (410) extends in a direction perpendicular to the axis of the nut (400).

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