Rapid butt joint structure and design method of lightweight rapid butt joint structure

Abstract

The invention discloses a rapid butt joint structure and a design method of a lightweight rapid butt joint structure, and relates to the technical field of mechanical devices. The multiple first clamping tongues are arranged at intervals in the circumferential direction of the top wall of the first shell, and a containing space is formed by the multiple first clamping tongues and the inner side wall of the first shell. The first guide rails are arranged at intervals in the height direction of the first clamping tongues corresponding to the first guide rails. The plurality of second clamping tongues are arranged at intervals along the outer wall of the second shell and correspond to the first clamping tongues; the second clamping tongue comprises a plurality of second guide rails; the second guide rails are arranged at intervals in the height direction of the second shell and correspond to the first guide rails. One end of the fastener penetrates through the side wall of the first shell to be connected to the radial clamping block, and the radial clamping block is located between the adjacent first clamping tongues; the elastic piece is arranged between the outer wall of the radial clamping block and the inner side wall of the first shell; the sides, away from the elastic pieces, of the radial clamping blocks incline downwards. The operation is more convenient, the working efficiency is improved, and the operation difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical devices, and particularly to a rapid docking structure and a design method for a lightweight rapid docking structure. Background Art

[0002] In the field of design and manufacturing of mechanical devices, the rapid and reliable connection between components is crucial for ensuring the overall performance and operating efficiency of the equipment. As a traditional connection method, threaded connection is widely used due to its convenience for loading and unloading. However, in some specific situations, such as applications like fixtures that require frequent and rapid clamping and loosening, the limitations of full-thread connection become apparent.

[0003] Although full-thread connection has a certain degree of reliability and stability, in situations where rapid disassembly and assembly are required, its operation process is relatively cumbersome. Specifically, full-thread connection requires rotating multiple thread turns to achieve the fastening or loosening of components, which not only consumes a large amount of time and manpower, but also during the frequent disassembly and assembly process, the threads are prone to wear, resulting in a reduction in the reliability and durability of the connection. Summary of the Invention

[0004] Embodiments of the present application solve the technical problem in the prior art that full-thread connection requires rotating multiple thread turns to achieve the fastening or loosening of components, which is time-consuming and laborious, by providing a rapid docking structure and a design method for a lightweight rapid docking structure.

[0005] In a first aspect, an embodiment of the present application provides a quick docking structure, including a first connection component, a second connection component, a radial latch, an elastic member, and a fastener; the first connection component includes a first housing, a plurality of first tongues, and a plurality of first guide rails; the plurality of first tongues are circumferentially spaced along the top wall of the first housing and form an accommodation space with the inner side wall of the first housing; the plurality of first guide rails are spaced along the height direction of the corresponding first tongue; the second connection component includes a second housing and a plurality of second tongues; the plurality of second tongues are spaced along the outer wall of the second housing and correspond to the first tongues; the second tongue includes a plurality of second guide rails; the plurality of second guide rails are spaced along the height direction of the second housing and correspond to the first guide rails; one end of the fastener passes through the side wall of the first housing and is connected to the radial latch, and the radial latch is located between adjacent first tongues; the elastic member is disposed between the outer wall of the radial latch and the inner side wall of the first housing; the side of the radial latch away from the elastic member is inclined downward; when the first connection component and the second connection component are locked, the first tongue is inserted between two adjacent second tongues, and at the same time the radial latch abuts against the outer wall of one of the second tongues, so that the elastic member is in a compressed state; the first housing is rotated so that the first guide rail is inserted between two adjacent second guide rails corresponding thereto, and as the radial latch gradually moves to the position between two adjacent second tongues, the elastic member returns to its initial state and pushes the radial latch to the locked position.

[0006] In combination with the first aspect, in a possible implementation, the elastic member includes four first elastic hooks, two second elastic hooks, and two third elastic hooks; the four first elastic hooks are all disposed circumferentially on the side of the radial latch facing the first housing; the two second elastic hooks and the two third elastic hooks are all disposed circumferentially on the side of the first housing facing the radial latch and correspond to the first elastic hooks; the two third elastic hooks are both located below the two second elastic hooks, and their lengths are less than the lengths of the two second elastic hooks, so that the radial latch is inclined downward.

[0007] In combination with the first aspect, in a possible implementation, the first housing is provided with a mounting hole, and the radial latch is provided with an internal thread; the fastener is provided with an external thread corresponding to the internal thread; one end of the fastener passes through the mounting hole and is connected to the internal thread.

[0008] In combination with the first aspect, in a possible implementation manner, the quick docking structure further includes a clamping rod; the fastener is provided with a clamping hole; when circumferential unlocking of the first connection assembly and the second connection assembly is required, the fastener is pulled to compress the elastic member. At this time, the clamping hole originally located inside the first housing is exposed outside the first housing, and the clamping rod is inserted into the clamping hole to achieve circumferential unlocking.

[0009] In combination with the first aspect, in a possible implementation manner, it is characterized in that there are four first lugs, and the four first lugs are evenly arranged on the top wall of the first housing; there are four second lugs, and the four second lugs are evenly arranged on the outer wall of the second housing.

[0010] In combination with the first aspect, in a possible implementation manner, each second lug includes three second guide rails; each first lug is provided with two first guide rails.

[0011] In combination with the first aspect, in a possible implementation manner, the radial clamping block is a hollow structure; the side of the first lug away from the first guide rail is a first opening structure; the side of the second guide rail facing the second housing is a second opening structure.

[0012] In combination with the first aspect, in a possible implementation manner, the second connection assembly further includes a third housing; the third housing is arranged at the bottom of the second housing, and its outer diameter is greater than the outer diameter of the second housing; the outer diameter of the first housing is equal to the outer diameter of the third housing.

[0013] In a second aspect, an embodiment of the present application provides a design method for a lightweight quick docking structure. Based on the quick docking structure of the first aspect or any possible implementation manner of the first aspect, the design method includes:

[0014] S1: According to the usage environment and functional requirements of the quick docking structure, determine the design load to be borne and the envelope size of the overall structure;

[0015] S2: Based on the design load determined in S1, determine the dimensional parameters of the first connection assembly, the second connection assembly, and the radial clamping block; wherein, the dimensional parameters include the inner circle radius, outer circle radius, central angle, and height of the first lug, the first guide rail, the second guide rail, and the radial clamping block. The inner circle radius and outer circle radius of the first lug, the first guide rail, the second guide rail, and the radial clamping block can be determined according to the assembly relationship between the first connection assembly and the second connection assembly;

[0016] The calculation formulas for the central angles of the first lug, the first guide rail, and the second guide rail are as follows:

[0017]

[0018] Among them, θ is the central angle of the first tongue, the first guide rail and the second guide rail, and p max is the maximum axial load borne by the quick docking structure in the working environment. R and r are the outer circle radius and inner circle radius of the first guide rail, the second guide rail and the first tongue respectively. [σ x is the allowable tensile stress of the first tongue, the first guide rail and the second guide rail;

[0019] The height calculation formulas of the first tongue, the first guide rail and the second guide rail are as follows:

[0020]

[0021] Among them, h is the height of the first tongue, the first guide rail and the second guide rail. R and r are the outer circle radius and inner circle radius of the first tongue, the first guide rail and the second guide rail respectively. θ is the central angle of the first tongue, the first guide rail and the second guide rail. q is the uniform load acting on the first tongue, the first guide rail and the second guide rail. [σ y is the allowable bending moment stress of the first tongue, the first guide rail and the second guide rail;

[0022] S3: Perform a dot matrix processing on the first tongue, the first guide rail, the second guide rail and the radial tongue, and determine the dot matrix rod size according to its stiffness and strength criteria;

[0023] The calculation formula of the dot matrix rod size is as follows:

[0024]

[0025] Among them, r design is the dot matrix rod size, [σ x is the allowable stress of the dot matrix rod; F is the axial load of the dot matrix rod; ΔL max is the maximum deformation of the dot matrix rod; L is the length of the dot matrix rod; E is the elastic modulus of the material;

[0026] S4: Based on the processed structure size and shape in S3, generate an STL model that can be directly used for additive manufacturing, and at the same time generate an envelope shell model corresponding to the STL model. Superimpose and combine the STL model and the envelope shell model to ensure their matching in position and size, and obtain a combined model;

[0027] S5: Perform corresponding post-processing editing on the combined model to obtain a post-processed model;

[0028] S6: Export the post-processed model as an STL format file for additive manufacturing.

[0029] In combination with the second aspect, in a possible implementation, in S4, when generating the STL model, the installation position and shape of the elastic member and the fastener are determined.

[0030] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects:

[0031] The quick docking structure provided by the embodiment of the present application includes a first connecting component, a second connecting component, a radial block, an elastic member and a fastener. When locking the first connecting component and the second connecting component, the first latch is vertically inserted between two adjacent second latches until the bottom of the second latch, so that the first shell and the second shell form a coaxial connection. At this time, the radial block abuts against the outer wall of one of the second latches, so that the elastic member is in a compressed state. Then, the first shell is rotated so that the first guide rail is inserted between the two adjacent second guide rails corresponding thereto, and the axial locking of the first connecting component and the second connecting component is achieved through the cooperation of the first guide rail and the second guide rail. When rotated into place, the radial block is inserted between the two adjacent second latches, the elastic member gradually recovers and pushes the radial block to the locking position, and the circumferential freedom of the first connecting component and the second connecting component is also locked.

[0032] When unlocking the first connecting assembly and the second connecting assembly, pull the fastener to move the radial block toward the first housing, and the elastic member is compressed, thereby completing the circumferential unlocking of the first connecting assembly and the second connecting assembly. Then, rotate the first housing to completely stagger the first guide rail and the corresponding second guide rail, thereby achieving the axial unlocking of the first connecting assembly and the second connecting assembly. Pull out the first connecting assembly vertically, thereby releasing the coaxial connection and completing the radial unlocking of the first connecting assembly and the second connecting assembly.

[0033] Therefore, the quick docking structure of the embodiment of the present application is more convenient to operate, improves work efficiency, and reduces operating difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of the structure of the first connection component provided in the embodiment of the present application Figure 1 ;

[0036] Figure 2 A schematic diagram of the structure of the first connection component provided in the embodiment of the present application Figure 2 ;

[0037] Figure 3 This is a schematic structural diagram of the elastic member provided by the embodiment of the present application;

[0038] Figure 4 This is a schematic structural diagram of the second connection component provided by the embodiment of the present application;

[0039] Figure 5 This is a schematic structural diagram of the radial latch provided by the embodiment of the present application;

[0040] Figure 6 This is a schematic structural diagram of the quick docking structure provided by the embodiment of the present application.

[0041] Icon: 1 - First connection component; 11 - First housing; 111 - Mounting hole; 12 - First tongue; 13 - First guide rail; 2 - Second connection component; 21 - Second housing; 22 - Second tongue; 221 - Second guide rail; 23 - Third housing; 3 - Radial latch; 4 - Elastic member; 41 - First elastic hook; 42 - Second elastic hook; 43 - Third elastic hook. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0043] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0044] The embodiment of the present application provides a quick docking structure, as Figures 1 to 6As shown in the figure, the quick docking structure includes a first connection component 1, a second connection component 2, a radial latch 3, an elastic member 4 and a fastener. The first connection component 1 includes a first housing 11, a plurality of first tongues 12 and a plurality of first guide rails 13. The plurality of first tongues 12 are circumferentially spaced along the top wall of the first housing 11 and form an accommodation space with the inner side wall of the first housing 11. The plurality of first guide rails 13 are spaced along the height direction corresponding to the first tongues 12. The second connection component 2 includes a second housing 21 and a plurality of second tongues 22. The plurality of second tongues 22 are spaced along the outer wall of the second housing 21 and correspond to the first tongues 12. The second tongue 22 includes a plurality of second guide rails 221. The plurality of second guide rails 221 are spaced along the height direction of the second housing 21 and correspond to the first guide rails 13. One end of the fastener passes through the side wall of the first housing 11 and is connected to the radial latch 3, and the radial latch 3 is located between adjacent first tongues 12. The elastic member 4 is disposed between the outer wall of the radial latch 3 and the inner side wall of the first housing 11. The side of the radial latch 3 away from the elastic member 4 is inclined downward.

[0045] Further, the lengths and arcs of the second guide rails 221 and the first guide rails 13 of the present application are the same. The distance between two adjacent second guide rails 221 is the same as the height of the first guide rails 13, which not only ensures that a stable connection structure can be formed in the radial direction of the overall structure, but also makes this connection mainly provided by the surface pressure between the first guide rails 13 and the second guide rails 221.

[0046] Specifically, the distance between two adjacent first guide rails 13 is set to be 4-6 mm. In the present application, the main function of the radial latch 3 is to achieve circumferential locking. In addition, the fastener and the elastic member 4 of the present application only play a limiting role and do not directly participate in the actual load bearing of the structure. Therefore, the fastener does not need to be overly pre-tightened or loosened, and the elastic member 4 can be selected to use a common spring with a lower stiffness coefficient.

[0047] It should be noted that when locking the first connection component 1 and the second connection component 2, the first tongue 12 is vertically inserted between two adjacent second tongues 22 until the bottom of the second tongue 22, so that the first housing 11 and the second housing 21 form a coaxial connection. At this time, the radial latch 3 abuts against the outer wall of one of the second tongues 22, so that the elastic member 4 is in a compressed state. Then, the first housing 11 is rotated so that the first guide rails 13 are inserted between two adjacent second guide rails 221 corresponding thereto, and the axial locking of the first connection component 1 and the second connection component 2 is achieved through the cooperation of the first guide rails 13 and the second guide rails 221. When the rotation is in place, the radial latch 3 is snapped into the space between two adjacent second tongues 22, the elastic member 4 gradually returns and pushes the radial latch 3 to the locking position, and the circumferential freedom of the first connection component 1 and the second connection component 2 is also locked.

[0048] When unlocking the first connection component 1 and the second connection component 2, pull the fastener to move the radial latch 3 towards the first housing 11, and the elastic member 4 is compressed accordingly, thus completing the circumferential unlocking of the first connection component 1 and the second connection component 2. Then, rotate the first housing 11 to completely stagger the first guide rail 13 from the corresponding second guide rail 221, achieving the axial unlocking of the first connection component 1 and the second connection component 2. Pull out the first connection component 1 vertically, thereby releasing the coaxial connection and completing the radial unlocking of the first connection component 1 and the second connection component 2.

[0049] Therefore, the quick docking structure of the embodiment of the present application is more convenient to operate, improves work efficiency, and reduces the operation difficulty.

[0050] In the embodiment of the present application, the elastic member 4 includes four first elastic hooks 41, two second elastic hooks 42, and two third elastic hooks 43. The four first elastic hooks 41 are all arranged circumferentially on the side of the radial latch 3 facing the first housing 11. The two second elastic hooks 42 and the two third elastic hooks 43 are both arranged circumferentially on the side of the first housing 11 facing the radial latch 3 and correspond to the first elastic hooks 41. The two third elastic hooks 43 are both located below the two second elastic hooks 42, and their lengths are less than those of the two second elastic hooks 42, so that the radial latch 3 is tilted downward, improving the stability and reliability of the connection and simplifying the locking and unlocking processes.

[0051] It should be noted that the radial latch 3 is designed to be tilted downward, so that it can be conveniently abutted against the side of the second tongue 22 away from the second housing 21. As the first housing 11 is further inserted, the radial latch 3 will gradually move downward. At this time, the second tongue 22 will squeeze the radial latch 3, and then the elastic member 4 will be in a compressed state.

[0052] In the embodiment of the present application, the first housing 11 is provided with a mounting hole 111, and the radial latch 3 is provided with an internal thread. The fastener is provided with an external thread corresponding to the internal thread. One end of the fastener passes through the mounting hole 111 and is connected to the internal thread.

[0053] In the embodiment of the present application, the quick docking structure further includes a clamping rod. The fastener is provided with a clamping hole. When it is necessary to perform circumferential unlocking on the first connection component 1 and the second connection component 2, pull the fastener outwards to compress the elastic member 4. At this time, the clamping hole originally located inside the first housing 11 is exposed outside the first housing 11, and the clamping rod is inserted into the clamping hole to achieve circumferential unlocking.

[0054] The design of the insertion clamping rod and the clamping hole in this application makes the circumferential unlocking process faster and more convenient. The operator does not need to perform complex operations or adjustments. Simply insert the clamping rod into the clamping hole and operate, saving manpower.

[0055] In the embodiment of this application, there are four first locking tongues 12, and the four first locking tongues 12 are evenly arranged on the top wall of the first housing 11. There are four second locking tongues 22, and the four second locking tongues 22 are evenly arranged on the outer wall of the second housing 21.

[0056] The even distribution of the four first locking tongues 12 and the second locking tongues 22 can make the overall structure more compact and reduce unnecessary space waste.

[0057] In the embodiment of this application, each second locking tongue 22 includes three second guide rails 221. Each first locking tongue 12 is provided with two first guide rails 13.

[0058] In the embodiment of this application, the radial clamping block 3 is a hollow structure. The side of the first locking tongue 12 away from the first guide rail 13 is a first opening structure. The side of the second guide rail 221 facing the second housing 21 is a second opening structure.

[0059] It should be noted that the hollow structure, the first opening structure and the second opening structure significantly reduce the weight of the overall structure, help reduce the use of materials, and thus reduce costs.

[0060] In the embodiment of this application, the second connection assembly 2 further includes a third housing 23. The third housing 23 is arranged at the bottom of the second housing 21, and its outer diameter is larger than the outer diameter of the second housing 21. The outer diameter of the first housing 11 is equal to the outer diameter of the third housing 23.

[0061] It should be noted that since the outer diameter of the first housing 11 is equal to the outer diameter of the third housing 23, when the first housing 11 is inserted in place, its bottom will naturally abut against the top of the third housing 23, providing a physical indication of being inserted in place. In the locked state, the first housing 11, the second housing 21 and the third housing 23 together form a stable overall structure. This structure can effectively resist adverse factors such as external pressure and vibration, ensuring the stability and reliability of the connection assembly.

[0062] The embodiment of this application provides a design method for a lightweight and fast docking structure. Based on the above fast docking structure, the design method includes the following steps:

[0063] S1: According to the use environment and functional requirements of the fast docking structure, determine the design load to be borne and the envelope size of the overall structure.

[0064] S2: Based on the design load determined in S1, determine the dimensional parameters of the first connection component 1, the second connection component 2, and the radial chuck 3; wherein, the dimensional parameters include the first tongue 12, the first guide rail 13, the second guide rail 221, the inner radius, outer radius, central angle, and height of the radial chuck 3. The inner radius and outer radius of the first tongue 12, the first guide rail 13, the second guide rail 221, and the radial chuck 3 can be determined according to the assembly relationship between the first connection component 1 and the second connection component 2; the central angle and height of the first tongue 12, the first guide rail 13, and the second guide rail 221 need to be designed based on mechanical analysis.

[0065] As Figure 6 shown, each first tongue 12 is provided with two first guide rails 13, and there are three corresponding second guide rails 221. Therefore, the axial load of this quick docking structure is mainly borne by the extrusion contact between the first guide rail 13 and the second guide rail 221. The two first guide rails 13 of each tongue 12 and the corresponding three second guide rails 221 have a total of eight contact surfaces, and the loads borne by each contact surface are the same. Therefore, the calculation formula for the central angle of the first tongue 12, the first guide rail 13, and the second guide rail 221 is as follows:

[0066]

[0067] wherein, θ is the central angle of the first tongue 12, the first guide rail 13, and the second guide rail 221, p max is the maximum axial load borne by the quick docking structure in the working environment, R and r are the outer radius and inner radius of the first guide rail 13, the second guide rail 221, and the first tongue 12 respectively, and [σ x is the allowable tensile stress of the first tongue 12, the first guide rail 13, and the second guide rail 221.

[0068] The calculation formula for the central angle of this application can calculate the minimum angle of the central angle of the first tongue 12, the first guide rail 13, and the second guide rail 221.

[0069] It should be noted that the central angle of the first tongue 12, the first guide rail 13, and the second guide rail 221 is determined according to the axial tensile strength check of the overall quick docking structure.

[0070] The height of the first guide rail 13 and the second guide rail 221 is determined by the strength check of the maximum bending moment section.

[0071] The calculation formula for the height of the first guide rail 13 and the second guide rail 221 is as follows:

[0072]

[0073] Among them, h is the height of the first guide rail 13 and the second guide rail 221, R and r are the outer circle radius and inner circle radius of the first guide rail 13 and the second guide rail 221 respectively, θ is the central angle of the first guide rail 13 and the second guide rail 221, q is the uniformly distributed load acting on the first guide rail 13 and the second guide rail 221, and [[σ y is the allowable bending stress of the first guide rail 13 and the second guide rail 221.

[0074] This application can calculate the minimum height of the first guide rail 13 and the second guide rail 221.

[0075] The height of the first tongue 12 is calculated according to the assembly relationship between the first guide rail 13, the second guide rail 221, and the first housing 11 and the second housing 12; the radial block 3 only plays a circumferential locking role and does not participate in actual load bearing, and its size is calculated according to the first tongue 12 and the first housing 11, the second tongue 22 and the second housing 21.

[0076] S3: Dot matrix process the first tongue 12, the first guide rail 13, the second guide rail 221, and the radial block 3, and determine the dot matrix rod size through its stiffness and strength criteria;

[0077] Stiffness is mainly determined by the material elastic modulus and cross-sectional dimensions, strength is mainly determined by the material and cross-sectional dimensions, and the rod size is determined by given maximum deformation and yield strength interfaces.

[0078] The stiffness criterion ensures that the deformation of the structure is within an acceptable range, and the strength criterion ensures that the rod will not yield or break under force.

[0079] The calculation formula for the dot matrix rod size is as follows:

[0080]

[0081] Among them, r design is the dot matrix rod size, [[σ x is the allowable stress of the dot matrix rod; F is the axial load of the dot matrix rod; ΔL max is the maximum deformation of the dot matrix rod; L is the length of the dot matrix rod; E is the elastic modulus of the material;

[0082] Dot matrix processing is an effective lightweighting method. It realizes the lightweighting of the docking structure by reducing the amount of material used while maintaining the structural integrity. This processing method not only reduces the weight but also helps to improve the heat dissipation performance and fatigue resistance of the structure.

[0083] This application uses the Lattice optimization module in OptiStruct software to complete the filling of the lattice structure. Different from the classical lattice optimization method, this application adopts a unique optimization parameter setting mode, which ensures that the optimization process creates the lattice structure only based on the boundaries of the finite element mesh, thereby constructing the lattice space within the entire lattice filling domain. The node information of this lattice space completely depends on the entity unit nodes in the solid optimization. In the same coordinate system, this lattice space maintains a good spatial logical relationship with the previously obtained solid model, outer envelope shell model, and non-design domain. In addition, since this application only uses the first operation result of the Lattice optimization, compared with the classical lattice optimization method that uses the entire Lattice optimization iteration process, its computational workload is greatly reduced. The specific parameter settings are as follows:

[0084] Optimization constraint: mass constraint, that is, ensure that the optimized lattice structure meets the quality requirements.

[0085] Lattice filling threshold: set the pseudo density not less than -1.

[0086] Lattice rod diameter: In order to facilitate processing, try to use a uniform lattice rod diameter.

[0087] Iteration upper limit: set to 1, that is, only perform one iteration operation.

[0088] S4: Based on the processed structure size and shape in S3, generate an STL model that can be directly used for additive manufacturing, and at the same time generate an envelope shell model corresponding to the STL model, and superimpose and combine the STL model and the envelope shell model to ensure their matching in position and size, and obtain a combined model.

[0089] Superimposing and combining the STL model and the envelope shell model ensures the matching of the STL model and the envelope shell model in position and size, thereby improving the manufacturing accuracy and reliability.

[0090] S5: Perform corresponding post-processing editing on the combined model to obtain a post-processing model.

[0091] S6: Export the post-processing model as an STL format file for additive manufacturing.

[0092] It should be noted that since the FEM (finite element) model and the STL (standard template library) model in the entire process are mutually supporting, the STL model can be directly exported from the FEM model. Specifically, we import the lattice FEM model into the Materialise3-matic software for further printing process optimization, and then a printable STL model can be generated.

[0093] After generating the STL model, we also need to combine it with the corresponding envelope shell model. This combination process is achieved through spatial superposition in the same coordinate system, without the need for additional assembly or Boolean operations. After performing corresponding process post-processing editing on the superposed and combined model, it can be exported as an STL model for additive manufacturing.

[0094] In the embodiment of this application, in S4, when generating the STL model, determine the installation positions and shapes of the elastic member 4 and the fastener.

[0095] Furthermore, compared with the serial design mode in the classical lattice-solid optimization design method (i.e., model preprocessing is carried out in CAD, then topology optimization and lattice filling are carried out in CAE, then return to CAD for reconstruction design, then carry out verification analysis in CAE, and finally iterative design may be required in CAD), the design method proposed in this application adopts an innovative parallel design mode. In this mode, we simultaneously build the FEM model for topology optimization and lattice design, and the STL model for additive manufacturing, in both CAE and CAD software.

[0096] Throughout the optimization process, the FEM model and the STL model are fully compatible, which means that we do not need to repeatedly build the model multiple times. At each key link in the process, when we obtain an FEM model or an STL model, the corresponding other model can also be obtained synchronously, without additional conversion or waiting time.

[0097] In addition, during the reconstruction and iterative design process, we only need to change the geometric features in the CAD software, or adjust the corresponding finite element mesh in the CAE software, and the change of either one can be automatically reflected in the other model. This design method significantly improves the design efficiency and reduces the possibility of human errors.

[0098] Finally, the verification analysis model is a natural continuation of the optimized model, and we can carry out subsequent verification and analysis work without rebuilding the model. This parallel design mode not only simplifies the design process but also improves the accuracy and reliability of the design.

[0099] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments.

[0100] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A quick docking structure, characterized in that: It comprises a first connecting component (1), a second connecting component (2), a radial clamping block (3), an elastic member (4) and a fastener; The first connection assembly (1) comprises a first housing (11), a plurality of first latching tongues (12) and a plurality of first guide rails (13); A plurality of the first latch tongues (12) are arranged at intervals along the circumference of the top wall of the first shell (11), and form a receiving space with the inner side wall of the first shell (11); A plurality of the first guide rails (13) are arranged at intervals along the height direction of the first latch tongues (12) corresponding thereto; The second connecting assembly (2) comprises a second housing (21) and a plurality of second latch tongues (22); A plurality of the second latch tongues (22) are arranged at intervals along the outer wall of the second housing (21) and correspond to the first latch tongues (12); The second latch (22) includes a plurality of second guide rails (221); A plurality of the second guide rails (221) are arranged at intervals along the height direction of the second shell (21) and correspond to the first guide rail (13); One end of the fastener passes through the side wall of the first shell (11) and is connected to the radial clamping block (3), and the radial clamping block (3) is located between adjacent first clamping tongues (12); The elastic member (4) is arranged between the outer wall of the radial clamping block (3) and the inner wall of the first shell (11); The radial clamping block (3) is tilted downward on a side away from the elastic member (4); When the first connecting component (1) and the second connecting component (2) are locked, the first latch tongue (12) is inserted between two adjacent second latch tongues (22), and at the same time, the radial latch block (3) is tightly attached to the outer wall of one of the second latch tongues (22), so that the elastic member (4) is in a compressed state; the first housing (11) is rotated to insert the first guide rail (13) between two adjacent second guide rails (221) corresponding thereto, and as the radial latch block (3) gradually moves to a position between two adjacent second latch tongues (22), the elastic member (4) returns to an initial state and pushes the radial latch block (3) to reach a locked position.

2. The quick docking structure according to claim 1, characterized in that: The elastic member (4) comprises four first elastic hooks (41), two second elastic hooks (42) and two third elastic hooks (43); The four first elastic hooks (41) are all arranged in the circumferential direction of one side of the radial clamping block (3) facing the first shell (11); The two second elastic hooks (42) and the two third elastic hooks (43) are both arranged in the circumferential direction of the first shell (11) on one side facing the radial block (3), and correspond to the first elastic hooks (41); The two third elastic hooks (43) are both located below the two second elastic hooks (42), and their lengths are both shorter than the lengths of the two second elastic hooks (42), so that the radial clamping block (3) is tilted downward.

3. The quick docking structure according to claim 1, characterized in that: The first shell (11) is provided with a mounting hole (111), and the radial clamping block (3) is provided with an internal thread; The fastener is provided with an external thread corresponding to the internal thread; One end of the fastener passes through the mounting hole (111) and is connected to the internal thread.

4. The quick docking structure according to claim 3, characterized in that: Also included is a snap-on bar; The fastener is provided with a snap-on hole; When the first connecting component (1) and the second connecting component (2) need to be circumferentially unlocked, the fastener is pulled to put the elastic component (4) into a compressed state. At this time, the clamping hole originally located in the first shell (11) is exposed to the outside of the first shell (11), and the clamping rod is inserted into the clamping hole to achieve circumferential unlocking.

5. The quick docking structure according to claim 1, characterized in that: There are four first latch tongues (12), and the four first latch tongues (12) are evenly arranged on the top wall of the first shell (11); There are four second latching tongues (22), and the four second latching tongues (22) are evenly arranged on the outer wall of the second shell (21).

6. The quick docking structure according to claim 1, characterized in that: Each of the second latches (22) comprises three of the second guide rails (221); Each of the first latch tongues (12) is provided with two of the first guide rails (13).

7. The quick docking structure according to claim 1, characterized in that: The radial clamping block (3) is a hollow structure; A side of the first latch tongue (12) away from the first guide rail (13) is a first opening structure; A side of the second guide rail (221) facing the second shell (21) is a second opening structure.

8. The quick docking structure according to claim 1, characterized in that: The second connecting assembly (2) further comprises a third housing (23); The third shell (23) is arranged at the bottom of the second shell (21), and its outer diameter is greater than the outer diameter of the second shell (21); The outer diameter of the first shell (11) is equal to the outer diameter of the third shell (23).

9. A design method for a lightweight quick docking structure, characterized in that: Based on the quick docking structure according to any one of claims 1 to 8, the design method includes: S1: Determine the design load required and the envelope size of the overall structure according to the use environment and functional requirements of the quick docking structure; S2: Based on the design load determined in S1, the dimension parameters of the first connecting component (1), the second connecting component (2) and the radial block (3) are determined; wherein the dimension parameters include the inner circle radius, outer circle radius, center angle and height of the first latch tongue (12), the first guide rail (13), the second guide rail (221) and the radial block (3); the inner circle radius and the outer circle radius of the first latch tongue (12), the first guide rail (13), the second guide rail (221) and the radial block (3) can be determined according to the assembly relationship between the first connecting component (1) and the second connecting component (2); The calculation formula of the central angle of the first latch (12), the first guide rail (13) and the second guide rail (221) is as follows: Wherein, θ is the central angle of the first latch (12), the first guide rail (13) and the second guide rail (221), and p max is the maximum axial load that the quick docking structure can withstand in a working environment, R and r are the outer radius and inner radius of the first guide rail (13), the second guide rail (221), and the first latch tongue (12), respectively, [σ x ] is the allowable tensile stress of the first latch tongue (12), the first guide rail (13) and the second guide rail (221); The height calculation formula of the first guide rail (13) and the second guide rail (221) is as follows: Wherein, h is the height of the first guide rail (13) and the second guide rail (221), R and r are the outer radius and inner radius of the first guide rail (13) and the second guide rail (221), respectively, θ is the central angle of the first guide rail (13) and the second guide rail (221), q is the uniform load acting on the first guide rail (13) and the second guide rail (221), [σ y ] is the allowable bending stress of the first guide rail (13) and the second guide rail (221); S3: performing a lattice processing on the first latch tongue (12), the first guide rail (13), the second guide rail (221) and the radial block (3), and determining the size of the lattice rods according to the stiffness and strength criteria thereof; The calculation formula for the size of the lattice rod is as follows: Among them, r design is the size of the lattice member, [σ x ] is the allowable stress of the lattice member; F is the axial load of the lattice member; ΔL max is the maximum deformation of the lattice rod; L is the length of the lattice rod; E is the elastic modulus of the material; S4: Based on the size and shape of the structure processed in S3, an STL model that can be directly used for additive manufacturing is generated, and an envelope shell model corresponding to the STL model is simultaneously generated. The STL model and the envelope shell model are superimposed and combined to ensure that the two are matched in position and size, and a combined model is obtained; S5: Perform corresponding process post-processing editing on the combined model to obtain a post-processing model; S6: Export the post-processed model as an STL file for additive manufacturing.

10. The design method of a lightweight quick docking structure according to claim 9, characterized in that: In S4, when the STL model is generated, the installation position and shape of the elastic member (4) and the fastener are determined.

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