Interlocking type mechanical bolt

Abstract

The utility model relates to a mutually-meshed mechanical bolt, which belongs to the field of mechanical engineering devices and comprises a lower connecting section, a middle section and an upper connecting section. The lower connecting section comprises a screw cap A, and the axis of the screw cap A is arranged along the vertical direction; the mounting seat A is fixed on the upper surface of the screw cap A; the threaded rod A is fixed on the upper surface of the mounting seat A, and the axis of the threaded rod A is vertically arranged; an external thread A is arranged on the outer wall of the threaded rod A; the threaded groove A is formed downwards from the upper surface of the threaded rod A; the axis of the threaded groove A coincides with the axis of the threaded rod A; the middle section comprises an inner sleeve; the threaded hole B is formed in the inner sleeve, and the axis of the threaded hole B coincides with that of the threaded rod A; the inner sleeve can be in threaded connection with an external thread A on the outer wall of the threaded rod A through the threaded hole B; the outer edges are fixed on the outer wall of the inner sleeve; a jacket; the outer sleeve can be movably arranged on the outer edge of the inner sleeve in a clamped mode through the inner grooves, and the outer sleeve can vertically slide relative to the inner sleeve. The mechanical bolt can bear stronger bending moment load.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical engineering devices, and in particular relates to a mutually engaged mechanical bolt. Background Art

[0002] The general ways of connecting parts are riveting, bolting, etc. For the connection of some special parts, such as the wing steel plate of an aircraft, because the wing steel plate of an aircraft is thicker, the bolt may reach a length of 30-40cm. If the bolt is used to connect the wing steel plate of an aircraft, the screw part of the bolt will be about 30-40cm long.

[0003] When the bolts of the above length are subjected to bending loads, because the screw part of the bolt is long, it is particularly easy to bend when subjected to bending moment, and even worse, it will break directly. Utility Model Content

[0004] The utility model discloses a mutually engaged mechanical bolt, which is used to improve the ability of resisting bending moment load and avoid bending of the bolt.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a mutually interlocking mechanical bolt, comprising a lower connecting section, an intermediate section and an upper connecting section; the lower connecting section comprises: a nut A, wherein the axis of the nut A is arranged along the vertical direction; a mounting seat A, which is fixed on the upper surface of the nut A; a threaded rod A, which is fixed on the upper surface of the mounting seat A, wherein the axis of the threaded rod A is arranged along the vertical direction; an external thread A is arranged on the upper outer wall of the threaded rod A; a thread groove A, which is opened downward from the upper surface of the threaded rod A; the axis of the thread groove A coincides with the axis of the threaded rod A; the intermediate section comprises: an inner sleeve; a threaded hole B, which is opened on the inner sleeve, wherein the axis coincides with the axis of the threaded rod A; the inner sleeve can be threadedly connected with the external thread A on the outer wall of the threaded rod A through the threaded hole B; a plurality of external edges, Fixed on the outer wall of the inner sleeve; outer sleeve; multiple inner grooves, the outer sleeve can be movably clamped on the outer edge of the inner sleeve through the inner groove, and the outer sleeve can slide vertically relative to the inner sleeve; the upper connecting section includes: a threaded rod B; the axis coincides with the axis of the thread groove A; the outer wall of the threaded rod B is provided with an external thread B; the threaded rod B can be threadedly connected with the thread groove A by relying on the external thread B; the pitches of the thread groove A, the external thread A, the threaded hole B and the external thread B are all the same; the thread direction of the external thread B is the same as that of the external thread A; a splicing sleeve, fixed on the upper surface of the threaded rod B; multiple splicing edges, the outer sleeve can slide vertically relative to the splicing edges of the splicing sleeve by relying on the inner groove; a mounting seat B, fixed on the upper surface of the splicing sleeve; a nut B, fixed on the upper surface of the mounting seat B.

[0006] Furthermore, the mounting seat A and the splicing sleeve abut against two ends of the inner sleeve respectively.

[0007] After the upper connecting section and the lower connecting section are connected, the position of the inner sleeve can be limited, so that the connection firmness of the upper connecting section and the lower connecting section is guaranteed.

[0008] Furthermore, the diameters of the nuts A and B are larger than the diameter of the outer sleeve.

[0009] The outer jacket can be prevented from falling off from both ends, because the vertical sliding of the outer jacket does not affect the actual use, so there is no restriction on the formation of the outer jacket, and the nut A and the nut B simply prevent the outer jacket from falling off.

[0010] Furthermore, the splicing edges and the outer edges are matched one by one with the corresponding inner grooves.

[0011] The unique method is adopted to make the splicing edge, the outer edge and the inner groove match each other, thereby avoiding the situation that the ground thread position is inaccurate due to the inaccurate matching of the groove, and further avoiding the situation that the threaded rod A is not easy to connect with the threaded groove A.

[0012] Furthermore, the lower end of the thread groove A is opened into the mounting seat A.

[0013] The depth of the thread groove A is made as deep as possible to ensure the firmness of the connection between the upper connecting section and the lower connecting section.

[0014] Beneficial effects:

[0015] 1. This bolt changes a complete bolt screw part into an upper connecting section, a middle section and a lower connecting section, and the three sections are threadedly connected to each other. When subjected to bending load, because of the threaded connection, part of the bending load will be converted into the tightening force between the three, thereby reducing the bending load borne by the bolt and making it have a stronger ability to resist bending load.

[0016] 2. Change the complete bolt and screw part into the upper connecting section, the middle section and the lower connecting section, so that the originally long bolt and screw are changed into three short sections. When subjected to bending load, the bending load in the middle section is the largest. Through the tightening force between the three, the bending load will be transferred to the two ends of the bolt, allowing the two ends of the bolt to bear part of the bending load, making it have a stronger ability to resist bending load. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of the bolt;

[0018] Figure 2 This is the exploded view of this bolt;

[0019] Figure 3 It is a simulation diagram of the deformation of existing bolts;

[0020] Figure 4 It is a simulation diagram of the deformation of the bolt in Example 1.

[0021] 1. Nut A; 2. Mounting seat A; 3. Threaded rod A; 4. Threaded groove A; 5. Inner sleeve; 6. Threaded hole B; 7. Outer edge; 8. Outer sleeve; 9. Inner groove; 10. Threaded rod B; 11. Splicing sleeve; 12. Splicing edge; 13. Mounting seat B; 14. Nut B; DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1:

[0023] See Figure 1 and Figure 2 , a mutually interlocking mechanical bolt, comprising a lower connecting section, a middle section and an upper connecting section.

[0024] The lower connection section includes:

[0025] Nut A1: In this embodiment, the shape of the nut A1 is a disc, and the axis of the nut A1 is arranged vertically.

[0026] The mounting seat A2 is fixedly connected to the upper surface of the nut A1. In this embodiment, the mounting seat A2 is cylindrical in shape, and the outer circumferential wall of the mounting seat A2 is provided with patterns. The axis of the mounting seat A2 coincides with the axis of the nut A1, and the diameter of the mounting seat A2 is smaller than the diameter of the nut A1.

[0027] The threaded rod A3 is fixedly connected to the upper surface of the mounting seat A2. In this embodiment, the threaded rod A3 is a round rod with a round end face, and the axis of the threaded rod A3 coincides with the axis of the mounting seat A2. The diameter of the threaded rod A3 is smaller than the diameter of the mounting seat A2. The outer wall of the threaded rod A3 is provided with an external thread A.

[0028] The thread groove A4 is opened downward from the upper surface of the threaded rod A3; the lower end of the thread groove A4 is located in the mounting seat A2. The axis of the thread groove A4 coincides with the axis of the threaded rod A3.

[0029] The middle section includes:

[0030] Inner sleeve 5, in this embodiment, inner sleeve 5 is cylindrical; the axis of inner sleeve 5 coincides with the axis of threaded rod A3. The diameter of inner sleeve 5 is smaller than the diameter of mounting seat A2, and the diameter of inner sleeve 5 is larger than the diameter of threaded rod A3. The lower surface of inner sleeve 5 can abut against the upper surface of mounting seat A2.

[0031] The threaded hole B6 has an axis that coincides with the axis of the inner sleeve 5. The inner sleeve 5 can be threadedly connected with the external thread A on the outer wall of the threaded rod A3 through the threaded hole B6.

[0032] A plurality of outer edges 7 are fixedly connected to the outer wall of the inner sleeve 5 .

[0033] The outer sleeve 8 is cylindrical in this embodiment. The height of the outer sleeve 8 is higher than that of the inner sleeve 5. The axis of the outer sleeve 8 coincides with the axis of the inner sleeve 5. The diameter of the nut A1 is larger than that of the outer sleeve 8, and the diameter of the outer sleeve 8 is larger than that of the inner sleeve 5.

[0034] A plurality of inner grooves 9 are arranged one by one corresponding to the outer edges 7 and cooperate with the outer edges 7; the outer cover 8 can be movably clamped on the outer edges 7 of the inner sleeve 5 through the inner grooves 9, and the outer cover 8 can slide vertically relative to the inner sleeve 5. The inner grooves 9 and the outer edges 7 adopt a fool-proof design, and the inner grooves 9 and the outer edges 7 can cooperate with each other in one and only one way.

[0035] The upper connection section includes:

[0036] The axis of the threaded rod B10 coincides with the axis of the thread groove A4; the outer wall of the threaded rod B10 is provided with an external thread B, the threaded rod B10 can pass through the middle of the inner sleeve 5, and the threaded rod B10 can be threadedly connected with the thread groove A4 by means of the external thread B. The pitches of the thread groove A4, the external thread A, the threaded hole B6 and the external thread B are all the same. The external thread A and the external thread B have the same thread direction. In this embodiment, the height of the threaded rod 10 along the vertical direction is equal to the height of the thread groove A along the vertical direction.

[0037] The splicing sleeve 11, in this embodiment, is cylindrical in shape, and the axis of the splicing sleeve 11 coincides with the axis of the threaded rod B10. It is fixed on the upper surface of the threaded rod B10;

[0038] A plurality of splicing edges 12 are fixed on the outer wall of the splicing sleeve 11. The splicing sleeve 11 can be movably clamped on the inner groove 9 of the outer sleeve 8 by means of the splicing edges 12, and the outer sleeve 8 can slide vertically relative to the splicing sleeve 11. The splicing edges 12 and the inner groove 9 adopt a fool-proof design, and the splicing edges 12 and the inner groove 9 can cooperate with each other in one and only one way.

[0039] The mounting seat B13 is fixed on the upper surface of the splicing sleeve 11. In this embodiment, the mounting seat B13 is cylindrical in shape, and the outer wall of the mounting seat B13 is provided with lines. The axis of the mounting seat B13 coincides with the axis of the splicing sleeve 11.

[0040] The nut B14 is fixed on the upper surface of the mounting seat B13. In this embodiment, the nut B14 is in the shape of a disc, and the axis of the nut B14 coincides with the axis of the mounting seat B13. The diameter of the nut B14 is greater than the diameter of the outer sleeve 8.

[0041] The use of this bolt:

[0042] First, the outer sleeve 8 is put on the splicing sleeve 11. Then the inner sleeve 5 is inserted into the outer sleeve 8. Because the foolproof design is adopted, the outer sleeve 8, the splicing sleeve 11 and the inner sleeve 5 can be spliced ​​with each other in one and only one way. This is to ensure that the threads at various positions will not affect each other. Moreover, there can be a groove between the external thread B of the threaded rod B10 and the threaded hole B6, and the groove can be threadedly connected with the external thread A of the outer wall of the threaded rod A3. The above threading process can be achieved by existing processes.

[0043] Then, insert the outer sleeve 8 into the hole of the parts to be spliced. Grasp the nut B14 to prevent the bolt from turning.

[0044] Then, after the threaded rod A3 is screwed into the above groove, the nut A1, the mounting seat A2, the threaded rod A3, the inner sleeve 5, the outer sleeve 8, the threaded rod B10, the splicing sleeve 11, the mounting seat B13 and the nut B14 are just bitten into a whole, the threaded rod A3 is screwed upward into the above groove, and the threaded rod B10 is screwed downward into the thread groove A4. Note that in actual situations, the lower surface of the threaded rod B10 does not necessarily reach the bottom end of the thread groove A.

[0045] Finally, the nut A1 and the nut B14 also abut against the two side surfaces of the parts respectively, and the mounting seat A2 and the splicing sleeve 11 can abut against the two ends of the inner sleeve 5 respectively. Note that in actual situations, if the mounting seat A2 and the splicing sleeve 11 do not abut against the two ends of the inner sleeve 5, it will not have any effect.

[0046] The outer sleeve 8 is not restricted and can slide vertically, but because the diameters of the mounting seat A2 and the mounting seat B13 are both larger than the inner diameter of the outer sleeve 8, although the outer sleeve 8 can slide vertically, the outer sleeve 8 can only always keep sliding with the splicing sleeve 11 and the inner sleeve 5, so it does not affect the use of the entire bolt. Embodiment 2:

[0047] In order to illustrate that the bolts in Example 1 can improve the bending and shear resistance, stress analysis diagrams of ordinary bolts and the bolts in Example 1 are designed in the simulation software.

[0048] In the simulation software, both the common bolt and the bolt in Example 1 are made of low alloy high strength steel, and have the same outer diameter and size. The simulation conditions are as follows: a pair of forces F=1000N in opposite directions are applied at the three equal points of the bolt in Example 1; the common bolt is subjected to the same force.

[0049] from Figure 3 and Figure 4 It can be seen that the maximum stress point is located in the mid-span of the bolt, that is, in the middle of the bolt.

[0050] The maximum deformation of the bolt in Example 1 is 0.00011633, while the maximum deformation of the ordinary bolt is 0.00038123. It can be seen that under the same stress condition, the anti-deformation ability of this product is better than that of ordinary bolts. Under actual stress conditions, the bolt in Example 1 has stronger anti-bending and anti-shearing capabilities.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A mutually interlocking mechanical bolt, characterized in that: It includes a lower connecting section, a middle section and an upper connecting section; The lower connection section includes: Nut A(1), assuming that the axis of nut A(1) is along the vertical direction; A mounting seat A (2) is fixed on the upper surface of the nut A (1); The threaded rod A (3) is fixed on the upper surface of the mounting seat A (2), and the axis of the threaded rod A (3) is arranged in the vertical direction; the outer wall of the threaded rod A (3) is provided with an external thread A; The thread groove A (4) is opened downward from the upper surface of the threaded rod A (3); the axis of the thread groove A (4) coincides with the axis of the threaded rod A (3); The middle section includes: Inner sleeve (5); The threaded hole B (6) is formed on the inner sleeve (5), and its axis coincides with the axis of the threaded rod A (3); the inner sleeve (5) can be threadedly connected to the external thread A on the outer wall of the threaded rod A (3) through the threaded hole B (6); A plurality of outer edges (7) are fixed on the outer wall of the inner sleeve (5); Coat (8); A plurality of inner grooves (9), the outer sleeve (8) can be movably clamped on the outer edge (7) of the inner sleeve (5) through the inner grooves (9), and the outer sleeve (8) can slide vertically relative to the inner sleeve (5); The upper connection section includes: The threaded rod B (10) has an axis that coincides with the axis of the thread groove A (4); an outer wall of the threaded rod B (10) is provided with an external thread B; the threaded rod B (10) can be threadedly connected with the thread groove A (4) by means of the external thread B; the thread groove A (4), the external thread A, the threaded hole B (6) and the external thread B have the same pitch; the external thread B has the same thread direction as the external thread A; A splicing sleeve (11) is fixed on the upper surface of the threaded rod B (10); A plurality of splicing edges (12), the outer sleeve (8) can slide vertically relative to the splicing edges (12) of the splicing sleeve (11) by relying on the inner groove (9); A mounting seat B (13) fixed on the upper surface of the splicing sleeve (11); The nut B (14) is fixed on the upper surface of the mounting seat B (13).

2. The interlocking mechanical bolt according to claim 1, characterized in that: The mounting seat A (2) and the splicing sleeve (11) respectively abut against two ends of the inner sleeve (5).

3. The interlocking mechanical bolt according to claim 1, characterized in that: The diameters of the nut A (1) and the nut B (14) are greater than the diameter of the outer sleeve (8).

4. The interlocking mechanical bolt according to claim 1, characterized in that: The splicing edges (12) and the outer edges (7) are matched one by one with the corresponding inner grooves (9).

5. The interlocking mechanical bolt according to claim 1, characterized in that: The lower end of the thread groove A (4) is opened into the mounting seat A (2).

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