Embedded leak-proof precision screw

Abstract

The utility model relates to the technical field of aviation precision screws, and discloses an embedded leakproof precision screw which comprises a screw body and an adjusting piece installed in the screw body. The screw body comprises an expansion shell, an internal thread ring and a reinforcing ring are arranged at the two ends of an inner cavity of the expansion shell correspondingly, multiple sets of first bent parts are fixedly connected to one end of the expansion shell, and the expansion shell is deformed through cooperation between the screw body and the adjusting part and position movement of the adjusting part; therefore, the screw can be evenly expanded during installation, the screw is tightly attached to the installation hole, the installation stability is improved, meanwhile, the first bending part and the second bending part deform, the outer sealing rubber ring and the inner sealing rubber ring are attached to the two ends of the installation hole, and the outer sealing rubber ring and the inner sealing rubber ring form a double-sealing structure with the two ends of the expansion shell. Leakage of liquid or gas is effectively prevented, and it is ensured that good sealing performance can still be kept in the high-pressure or complex environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation precision screw technical field, concretely is a kind of embedded anti-leakage precision screw. BACKGROUND

[0002] Precision screw is also called micro screw, it is micro fastener connecting product material, shape is micro, but in product key position, it can play key role, screw is the tool of sequentially and progressively fastening machine parts using the physical and mathematical principles of object's bevel circular rotation and friction, screw is the general term of fastener;

[0003] In prior art, the utility model content of application number: CN202221046394.0, a kind of high-strength precision screw is disclosed;Including fixed screw rod, screw cap, stabilizing assembly and fastening assembly, screw cap is located at the side of fixed screw rod, stabilizing assembly is set to the side of fixed screw rod, fastening assembly is set to the side of stabilizing assembly, by the plaque to be installed is set between stabilizing assembly and fastening assembly, then, stabilizing assembly is set in the outside of fixed screw rod, and by the multiple adhesive blocks of annular adhering plate side, the rear side of plaque is adhered and fixed, the annular plate of fastening assembly is set in the outside of screw rod, then, butterfly-shaped cap is rotated, and annular plate is fixed by fastening screw rod, so that annular plate can resist the plaque installed, so as to be stably installed, thereby improve practicability, prolong service life;

[0004] The above technical scheme can provide certain sealing effect by annular rubber pad, but its main role is to prevent loosening by compression, not specifically used for sealing, in high-strength or high-precision application scenarios, only rely on annular rubber pad may not provide sufficient sealing, therefore we need to propose a kind of embedded anti-leakage precision screw. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of embedded anti-leakage precision screw, by setting sealing washer on the outside and both ends of screw, improve the sealing property after screw installation, make screw swell after embedding installation hole, further improve the sealing property of screw and installation hole, to avoid liquid or gas leakage, improve the practicability of screw, to solve the problems proposed in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of embedded anti-leakage precision screw, comprising:

[0008] Screw body, and adjusting piece installed in the inside of screw body;

[0009] The screw body comprises an expansion shell, an inner thread ring and a reinforcing ring are arranged at two ends of an inner cavity of the expansion shell respectively, a plurality of first bending parts are fixedly connected to one end of the expansion shell, an outer sealing rubber ring is sleeved outside the plurality of first bending parts, a plurality of second bending parts are fixedly connected to the other end of the expansion shell, a sealing groove is formed in the other end of the expansion shell, and an inner sealing rubber ring is embedded in the sealing groove.

[0010] The adjusting part comprises an inner screw rod which is screwed in the inner thread ring, a push block is arranged at one end of the inner screw rod embedded in the expansion shell, a tapered head is fixedly connected to the other end of the inner screw rod, and a hexagonal block is arranged at one end of the tapered head.

[0011] Preferably, a plurality of expansion grooves are formed in the outer side of the expansion shell, and a plurality of reinforcing beams are arranged in the inner cavity of the expansion shell, and the plurality of reinforcing beams and the plurality of expansion grooves are arranged alternately in a staggered manner.

[0012] Preferably, a first guide block is fixedly connected to the inner wall of each of the plurality of first bending parts, a second guide block is fixedly connected to the inner wall of each of the plurality of second bending parts, and the cross section of each of the plurality of first guide blocks is triangular.

[0013] Preferably, a first slot is arranged between two adjacent groups of the first bending parts, a second slot is arranged between two adjacent groups of the second bending parts, and an outer buckle block which abuts against the outer sealing rubber ring is arranged on the outer side of each of the first bending parts.

[0014] Preferably, the inner diameter of the expansion shell is the same as the outer diameter of the push block, one end of the reinforcing beam is round, the inner diameter of the reinforcing ring is smaller than the outer diameter of the push block, and a plurality of anti-disengagement grooves are arranged on the outer side of the expansion shell.

[0015] Preferably, a sealing gasket is arranged between the inner thread ring and the plurality of first guide blocks, and the distance between the two reinforcing beams is smaller than the outer diameter of the push block.

[0016] Preferably, the cross section of the tapered head is isosceles trapezoidal, a hexagonal groove is formed in one side of the hexagonal block, and the length of the inner screw rod is the same as the length of the expansion shell.

[0017] Compared with the prior art, the screw body has the advantages that:

[0018] The utility model discloses a screw body and the cooperation between adjusting spare, through the position movement of adjusting spare, make the expansion shell deformation, and then can use the screw even expansion when installing, make the screw and the installation hole closely fit and improve the stability of installation, simultaneously make the deformation of first bending part and second bending part, make the both ends of outer sealing rubber ring and inner sealing rubber ring fit installation hole, and the both ends of expansion shell form double -sealed structure, effectively prevent the leakage of liquid or gas, ensure that still can keep good sealing performance under high pressure or complex environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is whole structure schematic diagram of the utility model;

[0020] Figure 2 It is screw body inside sectional view schematic diagram of the utility model;

[0021] Figure 3 It is adjusting spare structure schematic diagram of the utility model;

[0022] Figure 4 It is screw body sectional structure schematic diagram of the utility model.

[0023] In the drawing: 10, screw body;101, expansion shell;102, expansion through slot;103, internal thread ring;104, reinforcing beam;105, reinforcing ring;106, first bending part;107, second bending part;108, first guide block;109, second guide block;110, outer buckle block;111, anti -drop thread;112, sealing groove;113, sealing gasket;20, adjusting spare;201, inner screw;202, push block;203, taper head;204, hexagonal block;205, hexagonal groove;30, outer sealing rubber ring;40, inner sealing rubber ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0025] Please refer to Figures 1-4 The utility model provides a technical scheme: a kind of embedded anti-leakage precision screw, comprising:

[0026] Screw body 10, and adjusting spare 20 installed in the inside of screw body 10;

[0027] The screw body 10 comprises an expansion shell 101, the inner cavity of the expansion shell 101 is provided with an internal thread ring 103 and a reinforcing ring 105 at both ends respectively, a plurality of first bending parts 106 are fixedly connected at one end of the expansion shell 101, an outer sealing rubber ring 30 is sleeved outside the plurality of first bending parts 106, a plurality of second bending parts 107 are fixedly connected at the other end of the expansion shell 101, a sealing groove 112 is formed at the outer side of the other end of the expansion shell 101, and an inner sealing rubber ring 40 is embedded in the sealing groove 112.

[0028] The adjusting part 20 comprises an inner screw rod 201 which is screwed in the internal thread ring 103, the inner screw rod 201 is provided with a push block 202 at the embedded end in the expansion shell 101, the other end of the inner screw rod 201 is fixedly connected with a tapered head 203, and the tapered head 203 is provided with a hexagonal block 204 at one end.

[0029] A plurality of expansion grooves 102 are formed at the outer side of the expansion shell 101, a plurality of reinforcing beams 104 are arranged in the inner cavity of the expansion shell 101, the plurality of reinforcing beams 104 are arranged in a staggered and alternating manner with the plurality of expansion grooves 102, and when the push block 202 abuts against the reinforcing beam 104, the expansion shell 101 is deformed, which not only ensures the elasticity of the expansion shell 101, but also improves the strength and anti-deformation ability of the overall structure, and is suitable for high-strength application scenarios.

[0030] The inner wall of each of the plurality of first bending parts 106 is fixedly connected with a first guide block 108, the inner wall of each of the plurality of second bending parts 107 is fixedly connected with a second guide block 109, the cross section of each of the plurality of first guide blocks 108 is triangular, the first bending part 106 is bent by extruding the first guide block 108 by the tapered head 203, and similarly, the second bending part 107 is bent by abutting the second guide block 109 by the push block 202, so as to tightly fit the outer sealing rubber ring 30 and the inner sealing rubber ring 40 with both ends of the mounting hole, and improve the sealing performance of the screw installation.

[0031] A first slot is arranged between adjacent two groups of first bending parts 106, a second slot is arranged between adjacent two groups of second bending parts 107, and an outer buckle 110 abutting against the outer sealing rubber ring 30 is arranged at the outer side of each group of first bending parts 106, the first slot and the second slot facilitate the bending of the first bending part 106 and the second bending part 107, improve the universality of the screw, and avoid the outer sealing rubber ring 30 from being separated by using the outer buckle 110, and improve the anti-leakage effect.

[0032] The inner diameter of the expansion shell 101 is same as the outer diameter of the push block 202, one end of the reinforcing beam 104 is provided with a rounded corner, the inner diameter of the reinforcing ring 105 is smaller than the outer diameter of the push block 202, a plurality of anti-drop lines 111 are arranged on the outer side of the expansion shell 101, the expansion shell 101 is tightly arranged against the inner wall of the mounting hole through the anti-drop lines 111, the stability of installation is improved, and the reset of the internal screw 201 is avoided through the reinforcing ring 105, so that the stability of screw installation is improved.

[0033] The sealing gasket 113 is arranged between the internal thread ring 103 and the plurality of first guide blocks 108, the spacing of the opposite two reinforcing beams 104 is smaller than the outer diameter of the push block 202, the sealing property between the internal screw 201 and the internal thread ring 103 is improved through the sealing gasket 113, and the sealing property of the screw is further improved.

[0034] The cross section of the taper head 203 is provided in an isosceles trapezoidal shape, the hexagonal groove 205 is arranged on one side of the hexagonal block 204, the length of the internal screw 201 is same as the length of the expansion shell 101, the first bending part 106 is bent through the shape of the taper head 203, so that the outer sealing rubber ring 30 is tightly attached to the end of the mounting hole.

[0035] In use, the first bending part 106 end of the screw body 10 is inserted into the mounting hole, the outer sealing rubber ring 30 is abutted against one end of the aviation mounting hole, the internal screw 201 is rotated in the internal thread ring 103 through the tool rotating the hexagonal head, so that the push block 202 slides along the inner wall of the expansion shell 101, the push block 202 is tightly arranged against the reinforcing beam 104, the expansion shell 101 is deformed by a certain angle, the outer wall of the expansion shell 101 is attached to the inner wall of the mounting hole, the plurality of anti-drop lines 111 are embedded in the mounting hole, the installation stability of the expansion shell 101 is further improved, the push block 202 abuts against the second guide block 109 after passing through the reinforcing ring 105, the taper head 203 abuts against the first guide block 108, the first bending part 106 and the second bending part 107 are synchronously bent, the two ends of the screw body 10 are positioned, the stability of the screw body 10 installation is improved, the outer sealing rubber ring 30 and the inner sealing rubber ring 40 are tightly pressed, and the sealing property between the mounting hole and the screw body 10 is improved.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An embedded anti-leakage precision screw, characterized in that, include: Screw body (10), and adjusting member (20) installed inside screw body (10); The screw body (10) includes an expansion shell (101). An internal thread ring (103) and a reinforcing ring (105) are respectively provided at both ends of the inner cavity of the expansion shell (101). Multiple sets of first bending portions (106) are fixedly connected to one end of the expansion shell (101). An outer sealing ring (30) is sleeved on the outer side of the multiple sets of first bending portions (106). Multiple sets of second bending portions (107) are fixedly connected to the other end of the expansion shell (101). A sealing groove (112) is opened on the outer side of the other end of the expansion shell (101). An inner sealing ring (40) is embedded in the sealing groove (112). The adjusting component (20) includes an inner screw (201) threadedly connected to an inner threaded ring (103). One end of the inner screw (201) is provided with a push block (202) embedded in the expansion shell (101). The other end of the inner screw (201) is fixedly connected with a cone (203). One end of the cone (203) is provided with a hexagonal block (204).

2. The embedded anti-leakage precision screw according to claim 1, characterized in that: The outer side of the expansion shell (101) has multiple sets of expansion slots (102), and the inner cavity of the expansion shell (101) is provided with multiple sets of reinforcing beams (104). The multiple sets of reinforcing beams (104) and the multiple sets of expansion slots (102) are arranged alternately and in a staggered manner.

3. The embedded anti-leakage precision screw according to claim 2, characterized in that: The inner walls of multiple sets of first bending portions (106) are fixedly connected with first guide blocks (108), and the inner walls of multiple sets of second bending portions (107) are fixedly connected with second guide blocks (109). The cross-sections of multiple sets of first guide blocks (108) are triangular.

4. The embedded anti-leakage precision screw according to claim 3, characterized in that: A first slot is provided between two adjacent groups of first bending portions (106), and a second slot is provided between two adjacent groups of second bending portions (107). An outer buckle (110) that abuts against the outer sealing ring (30) is provided on the outer side of each group of first bending portions (106).

5. An embedded anti-leakage precision screw according to claim 4, characterized in that: The inner diameter of the expansion shell (101) is the same as the outer diameter of the push block (202). One end of the reinforcing beam (104) is rounded. The inner diameter of the reinforcing ring (105) is smaller than the outer diameter of the push block (202). Multiple sets of anti-slip textures (111) are provided on the outer side of the expansion shell (101).

6. An embedded anti-leakage precision screw according to claim 5, characterized in that: A sealing gasket (113) is provided between the internal threaded ring (103) and the multiple sets of first guide blocks (108), and the distance between the two sets of reinforcing beams (104) is less than the outer diameter of the push block (202).

7. An embedded anti-leakage precision screw according to claim 6, characterized in that: The cone (203) has an isosceles trapezoidal cross section, and a hexagonal slot (205) is provided on one side of the hexagonal block (204). The length of the inner screw (201) is the same as the length of the expansion shell (101).

Images