Self-damping threaded connection structure

Abstract

The utility model provides a self-damping threaded connection structure, which belongs to the technical field of mechanical connection and comprises a threaded connection body, a damping cavity is axially arranged in the threaded connection body, and a damping structure is axially arranged in the damping cavity along the threaded connection body. The damping structure is used for transmitting and dissipating vibration loads borne by the threaded connection body. Vibration loads borne by the threaded connection body are transmitted and dissipated through the damping structure, the influence of the vibration loads on a threaded connection area can be effectively reduced, the threaded connection area is prevented from loosening, and the technical problem that due to long-time service, the threaded connection area is gradually loosened, and connection failure is caused is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical connection, relates to thread connection technology, and specifically is a self-damping thread connection structure. Background Art

[0002] Threaded connections are the most common connection method in the industrial field. They are used to connect multiple components in a removable and fixed manner through mechanical connection. They have the advantages of simple structure, reliable connection, and easy assembly and disassembly. In some demanding service environments, threaded connectors are generally made of metal and are generally solid structures. The manufacturing process mainly relies on machining.

[0003] After traditional threaded connectors are installed and tightened, the connected parts may be in motion or may be subject to vibration, which will cause the threaded connectors to be subjected to external vibration loads. When the threaded connectors are subjected to external vibration loads for a long time, the threaded connection area will gradually loosen. When the looseness reaches a certain level, it will cause the connection to fail, which may easily lead to safety accidents. Utility Model Content

[0004] In view of the technical problem described in the above background technology that threaded connectors may gradually loosen in the threaded connection area due to external vibration loads and may suffer from connection failure after long-term service, the present utility model proposes a self-damping threaded connection structure to address this technical problem.

[0005] The utility model provides a damping cavity along the axial direction inside the threaded connection body, and a damping structure is provided along the axial direction of the threaded connection body in the damping cavity. The vibration load applied to the threaded connection body is transmitted and dissipated by the damping structure, which can effectively reduce the influence of the vibration load on the threaded connection area, prevent the threaded connection area from loosening, and solve the technical problem of connection failure caused by gradual loosening of the threaded connection area due to long-term service.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The utility model discloses a self-damping threaded connection structure, comprising a threaded connection body, wherein a damping cavity is axially arranged inside the threaded connection body, and a damping structure is arranged axially inside the damping cavity, and the damping structure is used to transmit and dissipate the vibration load on the threaded connection body.

[0008] It is further defined that the damping structure includes at least two levels of first damping, at least two levels of first damping are arranged in the damping cavity along the axial direction of the threaded connection body, and two adjacent levels of first damping are connected to each other, and the vibration load transmission direction of the first damping is from the cavity wall of the damping cavity through each level of first damping to the center of the damping cavity step by step.

[0009] Further limited, the first damping arranged near the cavity wall side of the damping cavity is connected with the cavity wall at multiple points, and the adjacent two levels of the first damping are connected at multiple points;

[0010] Each of the first dampings has at least one free end.

[0011] Further limited, the multiple point connection between the adjacent two levels of the first dampings is provided with a second damping, the second damping is used for transmitting the vibration load between the adjacent two levels of the first dampings, and the second damping is a curve or a curved surface structure.

[0012] Further limited, each of the first dampings includes at least two curve structures with spatial curvature characteristics, and the curve structures of each of the first dampings are uniformly distributed along the axis of the damping cavity.

[0013] Further limited, the two ends of the second damping are respectively connected with the wave crest and the wave trough of the curve structures of the adjacent two levels of the first dampings.

[0014] Further limited, the self-damping threaded connection structure further includes a head connected to one end of the threaded connection body, the damping structure further includes a damping support rib arranged in the damping cavity, and the bottom end of the first damping is connected with the head through the damping support rib.

[0015] Further limited, the damping support rib is spiral-shaped.

[0016] Further limited, the self-damping threaded connection structure is manufactured by using an additive manufacturing technology.

[0017] Further limited, the self-damping threaded connection structure further includes a process hole, the process hole is arranged on the threaded connection body and / or the head, and the process hole is communicated with the damping cavity.

[0018] Compared with the prior art, the self-damping threaded connection structure has the following beneficial effects:

[0019] 1、The self-damping threaded connection structure sets the damping cavity in the threaded connection body along the axial direction, sets the damping structure in the damping cavity along the axial direction of the threaded connection body, transmits and dissipates the vibration load received by the threaded connection body through the damping structure, can effectively reduce the influence of the vibration load on the threaded connection area, prevents the threaded connection area from loosening, solves the technical problem that the threaded connection area is loosened due to long-term service, and causes connection failure.

[0020] 2、The self-damping threaded connection structure sets the damping cavity on the threaded connection body, can reduce the weight of the threaded connection body, makes the threaded connection body have the characteristics of lightweight, and can greatly reduce the weight of the application equipment when applied in large quantities.

[0021] 3、 The damping structure includes at least two levels of first dampings, and the vibration load received by the threaded connection body is transmitted and dissipated by the at least two levels of first dampings, so that the dissipation effect of the vibration load is improved.

[0022] 4、 The first damping and the cavity wall of the damping cavity are connected at multiple points, and the adjacent two levels of first dampings are connected at multiple points, so that the vibration load is transmitted at multiple points through the multiple-point connection, so that the vibration load is fully transmitted between the first damping and the cavity wall of the damping cavity and between the adjacent two levels of first dampings, and the transmission effect of the vibration load is improved.

[0023] 5、 The first damping of each level has at least one free end, and the free end can dissipate the vibration load better.

[0024] 6、 The damping structure further includes damping support ribs, which are used to dissipate the vibration load and support and connect the entire damping structure, thereby improving the stability of the entire damping structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the self-damping threaded connection structure of the utility model Figure 1 ;

[0026] Figure 2 is a schematic diagram of the self-damping threaded connection structure of the utility model Figure 2 ;

[0027] Figure 3 is a structural schematic diagram of the damping mechanism

[0028] Figure 4 is Figure 1 a longitudinal sectional view

[0029] In the figure, 1 is an end, 101 is a flat head, 2 is a threaded connection body, 3 is a process hole, 4 is a first damping of a first level, 5 is a second damping, 6 is a first damping of a second level, and 7 is a damping support rib. DETAILED DESCRIPTION

[0030] The technical scheme of the utility model will be further explained and described below in combination with the drawings and embodiments, but the utility model is not limited to the following described embodiments.

[0031] The utility model provides a kind of self-damping threaded connection structure, including threaded connection body 2, threaded connection body 2 inside is provided with damping cavity along the axial direction, damping cavity is provided with damping structure along the axial direction of threaded connection body 2 in, damping structure is used to transmit and dissipate the vibration load received by threaded connection body 2.

[0032] The damping cavity is arranged on the threaded connection body 2, on one hand, damping structures can be arranged in the damping cavity, and the damping structures can transmit and dissipate the vibration load received by the threaded connection body, so that the influence of the vibration load on the threaded connection region can be effectively reduced, and the threaded connection region can be prevented from loosening, and on the other hand, the weight of the threaded connection body 2 can be reduced, so that the threaded connection body 2 has the characteristics of light weight. The wall thickness of the damping cavity can be designed according to the required connection strength.

[0033] In the utility model, the damping structure includes at least two levels of first dampings, the at least two levels of first dampings are arranged in the damping cavity along the axial direction of the threaded connection body 2, and adjacent two levels of dampings are connected to each other, and the vibration load transmission direction of the at least two levels of dampings is diffused from the cavity wall of the damping cavity to the center of the damping cavity; wherein the first damping arranged on the side close to the cavity wall of the damping cavity is connected to the cavity wall of the damping cavity at multiple points, and adjacent two levels of first dampings are connected at multiple points; at least one end of each level of first dampings is a free end, and the free end can better dissipate the vibration load. The number of levels of the first damping can be two, three, four or even more, and the specific number of levels can be determined according to the inner diameter of the threaded connection body 2, the size of the damping cavity and the size of the vibration load received, and the utility model is not limited in this regard.

[0034] The self-damping threaded connection structure of the utility model further includes an end head 1 connected to one end of the threaded connection body 2, and the damping structure further includes a damping support rib 7 arranged in the damping cavity, and the bottom end of the first damping is connected to the end head 1 through the damping support rib 7.

[0035] The self-damping threaded connection structure of the utility model further includes an end head 1 connected to one end of the threaded connection body 2, and the damping cavity extends to the inner end face of the end head 1, and the inner end face of the end head 1 refers to the end face of the end head 1 and the threaded connection body 2; the other end of the threaded connection body 2 is columnar or screw-shaped, and a process hole 3 is arranged at the end, and the process hole 3 is in communication with the damping cavity. The threaded connection body 2 is columnar, and threads are arranged on the outer surface of the threaded connection body 2, and the size of the threads is arranged according to the installation requirements and specifications. The shape of the threads can be triangular threads, rectangular threads, trapezoidal threads, zigzag threads or other special-shaped threads.

[0036] As another embodiment of the utility model, the process hole 3 can also be arranged on the threaded connection body 2 and in communication with the damping cavity. Specifically, the arrangement of the process hole 3 is not limited in the utility model, and any method that can clear residual powder through the process hole 3 is acceptable.

[0037] Specifically, the end 1 is a flat head 101, a countersunk head or a conical head. The peripheral contour of the end 1 can be designed as a hexagon or a circle, and the end face of the end 1 can be designed as an internal hexagonal type, a flat slot type or a cross type according to the installation mode requirements.

[0038] As an embodiment of the utility model, the damping structure includes a first damping 4, a second damping 5 and a second first damping 6, the first damping 4 and the second first damping 6 are arranged in the damping cavity along the axial direction of the threaded connection body 2, the first damping 4 is arranged on the side close to the inner wall of the damping cavity, and the first damping 4 is connected to the inner wall of the damping cavity at multiple points, and the first damping 4 is used for transmitting and dissipating the vibration load received by the threaded connection body 2; the second first damping 6 is arranged at the center of the damping cavity, and the second first damping 6 is connected to the first damping 4, and the second first damping 6 is used for dissipating the vibration load received by the threaded connection body 2; the second damping 5 is connected between the first damping 4 and the second first damping 6, and the second damping 5 is used for transmitting the residual vibration load dissipated by the first damping 4 to the second first damping 6, and the vibration load is transmitted and dissipated at multiple levels through the first damping 4, the second damping 5 and the second first damping 6, thereby improving the dissipation effect of the vibration load. Specifically, a plurality of second dampings 5 are arranged in parallel between the first damping 4 and the second first damping 6 to realize the multiple-point connection of the first damping 4 and the second first damping 6.

[0039] In the utility model, at least one end of the first damping 4 is a free end; at least one end of the second first damping 6 is a free end. The free end of the first damping 4 and the free end of the second first damping 6 can dissipate the vibration load better.

[0040] In the utility model, the first damping 4 and the second first damping 6 are distributed at multiple levels along the circumferential direction of the damping cavity, and a certain gap is left between the first damping 4 and the second first damping 6 as a vibration load dissipation gap. Specifically, the number of the first damping 4 can be two, three, four, five or even more, and the number of the second first damping 6 can be two, three, four, five or even more. As a preferred mode of the utility model, the number of the first damping 4 is the same as the number of the second first damping 6.

[0041] Preferably, in the utility model, the first damping 4 and the second first damping 6 are both curve type structures with spatial curvature characteristics. One end of the second damping 5 is connected to the trough part of the first damping 4, and the other end is connected to the peak part of the second first damping 6; or one end of the second damping 5 is connected to the peak part of the first damping 4, and the other end is connected to the trough part of the second first damping 6. The cooperation of the trough part and the peak part can better dissipate the vibration load.

[0042] In the damping structure, the damping support rib 7 is connected to the second first damping 6 at one end and connected to the end head 1 at the other end. The damping support rib 7 is used to dissipate the vibration load on one side, and is used to support and connect the first first damping 4, the second damping 5 and the second first damping 6 on the other side, thereby improving the stability of the first first damping 4, the second damping 5 and the second first damping 6.

[0043] In the damping structure, the damping support rib 7 is connected to the second first damping 6 at one end and connected to the end head 1 at the other end. The damping support rib 7 is used to dissipate the vibration load on one side, and is used to support and connect the first first damping 4, the second damping 5 and the second first damping 6 on the other side, thereby improving the stability of the first first damping 4, the second damping 5 and the second first damping 6.

[0044] Preferably, the first first damping 4, the second damping 5 and the second first damping 6 are all curve type structures with spatial curvature characteristics, and can be specifically a wave-shaped curve type structure, a polyline curve type structure or a curved surface curve type structure. The cross section of the first first damping 4, the second damping 5, the second first damping 6 and the damping support rib 7 can be circular, rectangular, polygonal or irregular.

[0045] Preferably, the part of the first first damping 4 close to the inner wall of the damping cavity is connected with the damping cavity, so that the vibration load can be transmitted to the first first damping 4 through the inner wall, and the first first damping 4 can move in a certain degree along the transverse and axial directions to dissipate the vibration load transmitted in multiple directions; the second damping 5 is mainly used for transmitting the vibration load, and can also dissipate the vibration load by elastic deformation of its own structure; the second first damping 6 is mainly used for dissipating the vibration load.

[0046] In the damping structure, the damping support rib 7 is connected to the second first damping 6 at one end and connected to the end head 1 at the other end. The damping support rib 7 is used to dissipate the vibration load on one side, and is used to support and connect the first first damping 4, the second damping 5 and the second first damping 6 on the other side, thereby improving the stability of the first first damping 4, the second damping 5 and the second first damping 6.

[0047] Embodiment

[0048] Referring to Figure 1 and Figure 2 , the self-damping threaded connection structure is a bolt, the thread of the threaded connection body 2 can be designed according to the requirements of the fastening scene, the outer contour size of the threaded connection body 2 is determined according to the size requirements of the hole to be installed, and the cross-sectional wall thickness size is determined according to the design load.

[0049] The end 1 of the bolt is a flat head 101, the outer contour is hexagonal, one end of the threaded connecting body 2 is connected with the end 1, the other end is columnar, and a process hole 3 is arranged at the end, an damping cavity is arranged in the threaded connecting body 2 in the axial direction, see Figure 3 and Figure 4 A two-stage first damping is arranged in the damping cavity in the axial direction of the threaded connecting body 2, and the two-stage first damping is respectively a first-stage first damping 4 and a second-stage first damping 6; the first-stage first damping 4 is connected with the inner wall of the damping cavity, preferably, the first-stage first damping 4 is a wavy curve structure, and the cross-sectional shape is circular. Five connecting points are arranged between the wavy curve structure and the inner wall of the damping cavity, and the connecting area is located at the wave trough of the wavy line. In the embodiment, four groups of the first-stage first damping 4 are arranged in the circumferential direction of the damping cavity.

[0050] In the embodiment, the second damping 5 is arranged on the inner side of the first-stage first damping 4 (the side away from the inner wall of the damping cavity), the second damping 5 is a wavy curve structure, and the cross-sectional shape is circular. The second damping 5 is connected to the wave crest part of the first-stage first damping 4.

[0051] In the embodiment, the second-stage first damping 6 is arranged on the inner side of the second damping 5 (the center of the damping cavity), the second damping 5 is connected to the wave trough part of the second-stage first damping 6, the second-stage first damping 6 is developed in the axial direction of the damping cavity and distributed in the circumferential direction of the damping cavity, the second-stage first damping 6 is a wavy curve structure, and the cross-sectional shape is circular.

[0052] In the embodiment, the damping structure is a closed gourd-shaped structure, a spiral damping support rib 7 is arranged at one end of the damping structure close to the end 1, and the other end away from the end 1 is a free end.

[0053] In the embodiment, the number of the first-stage first damping 4, the second damping 5 and the second-stage first damping 6 is the same.

[0054] In the embodiment, after the bolt is mounted and fastened, the vibration load is transmitted into the damping structure through the threaded connecting body 2, and the displacement and elastic deformation of the first-stage first damping 4, the second damping 5 and the second-stage first damping 6 realize energy dissipation, so that the influence of the vibration load is reduced, and the connection and fastening effect is improved.

[0055] The self-damping threaded connecting structure is formed through additive manufacturing technology, and the forming process is as follows:

[0056] The raw material is selected from steel, and other materials such as aluminum alloy and titanium alloy can also be selected according to different application requirements.

[0057] The three-dimensional model of the designed self-damping threaded connection structure is converted into STL data format, and after the conversion, the completeness and the surface patch geometry of the STL data are checked, including model closure, surface patch direction, interference shell, sharp edge, etc., to ensure that the data is complete and free of data errors.

[0058] The model is imported into a commercial support design software, with the outer end surface of the end 1 as the bottom surface, adhering to the printing substrate, as the process placement scheme of the part (self-damping threaded connection structure).

[0059] The STL data is imported into a commercial printing forming segmentation software to perform program segmentation to form a slice file.

[0060] The slice file is imported into a laser 3D printer, and the laser selective melting parameters are set: laser power: 280W-365W, scanning speed: 590-1350mm / s, overlap rate: 30%-55%, powder layer thickness: 0.02-0.14mm, preferably, the powder layer thickness is 0.06mm, and the 3D printing forming of the part (self-damping threaded connection structure) is performed.

[0061] After the forming is completed, the residual powder in the inner cavity of the part (self-damping threaded connection structure) is cleaned out through the process hole 3.

[0062] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A self-damping threaded connection structure, characterized in that, The self-damping threaded connection structure comprises a threaded connection body (2) provided with a damping cavity inside along the axial direction, and a damping structure inside the damping cavity along the axial direction of the threaded connection body (2), which is used for transmitting and dissipating the vibration load received by the threaded connection body (2). The damping structure comprises at least two levels of first dampings, each of which is arranged in the damping cavity along the axial direction of the threaded connection body (2), and the adjacent two levels of first dampings are connected to each other, and the vibration load transmission direction of the first damping is diffused to the center of the damping cavity through each level of first dampings from the cavity wall of the damping cavity.

2. The self-damping threaded connection structure of claim 1, wherein, The first damping arranged near the cavity wall of the damping cavity is connected to the cavity wall of the damping cavity at multiple points, and the adjacent two levels of first dampings are connected at multiple points. Each of the first dampings has at least one free end.

3. The self-damping threaded connection structure of claim 2, wherein, The second damping (5) is arranged at the multiple-point connection between the adjacent two levels of first dampings, and is used for transmitting the vibration load between the adjacent two levels of first dampings, and the second damping (5) is a curved or curved surface structure.

4. The self-damping threaded connection structure of claim 3, wherein, Each of the first dampings comprises at least two curved structures with spatial curvature characteristics, and the curved structures of each of the first dampings are uniformly distributed along the axial center of the damping cavity.

5. The self-damping threaded connection structure of claim 4, wherein, The two ends of the second damping (5) are respectively connected to the wave crest and wave trough of the curved structures of the adjacent two levels of first dampings.

6. The self-damping threaded connection structure of claim 3, wherein, The self-damping threaded connection structure further comprises an end head (1) connected to one end of the threaded connection body (2), and the damping structure further comprises a damping support rib (7) arranged in the damping cavity, and the bottom end of the first damping is connected to the end head (1) through the damping support rib (7).

7. The self-damping threaded connection structure of claim 6, wherein, The damping support rib (7) is spiral-shaped.

8. A self-damping threaded connection according to any one of claims 1 to 7, characterized in that, The self-damping threaded connection structure is manufactured by using additive manufacturing technology.

9. The self-damping threaded connection structure of claim 8, wherein, The self-damping threaded connection structure further comprises a process hole (3) arranged on the threaded connection body (2) and / or the end head (1), and the process hole (3) is in communication with the damping cavity.

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