High-temperature-resistant and anti-seizure A286 self-locking fastener

Abstract

The utility model relates to the technical field of fasteners, and particularly discloses a high-temperature-resistant and anti-seizure A286 self-locking fastener which comprises a bolt head, a screw is fixed to the bottom of the bolt head, a first self-locking gasket is arranged outside the screw in a sleeved mode, a second self-locking gasket is arranged below the first self-locking gasket, a fixing piece is arranged below the second self-locking gasket, and the fixing piece is fixed to the bottom of the bolt head. A locking nut is arranged below the fixing sheet; a limiting piece is fixedly arranged at the top of the locking nut, a lifting piece is arranged in the limiting piece, a high-temperature-resistant film is arranged below the lifting piece, fastening glue is filled in the high-temperature-resistant film, a glue flowing groove is formed in the locking nut, and a puncture nail is installed in the glue flowing groove. And a limiting hole is formed in the fixing piece, a pushing rod is arranged in the limiting hole, and a pushing plate is fixedly arranged at the top of the pushing rod. The nut can be locked, and the nut can be used under different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a high temperature resistant and anti-bite A286 self-locking fastener. Background Art

[0002] A286 is an iron-chromium-nickel-based high-temperature alloy strengthened by adding molybdenum, titanium, aluminum, vanadium and trace amounts of boron. The alloy has high yield strength, endurance strength and creep strength below 650°C, and has good processing plasticity and welding properties. These characteristics make the A286 alloy very suitable for manufacturing fasteners that need to withstand high temperatures and high pressures. A286 self-locking fasteners are fastener products with excellent high-temperature performance and self-locking capabilities, and have broad application prospects in aerospace engines, industrial gas turbines and other fields.

[0003] If the fasteners do not have a self-locking structure, they will fall off under constant vibration, which may cause the fastened workpieces to separate and affect normal work.

[0004] The existing public technical scheme, with announcement number CN221097160U, discloses a self-locking fastener, including a bolt and a spacer, wherein the bolt includes a screw rod and a bolt head, the bolt head is fixedly installed on the top end of the screw rod, the spacer is sleeved on the surface of the screw rod, a limiting rod is fixedly installed on the bottom of the spacer, and a locking mechanism for fixing with the spacer is provided on the surface of the bolt head. The locking mechanism and the spacer with the limiting rod can be engaged with the workpiece by utilizing the limiting rod at the bottom of the spacer, and then the limiting ring on the surface of the bolt head can be engaged with the tooth groove on the spacer, and the limiting ring can move up and down on the bolt head, thereby achieving self-locking.

[0005] When the above technical solution is actually implemented, it is suitable for the installation method in which the screw is completely embedded in the workpiece. If the end of the screw is exposed, the ordinary nut is installed on the screw and the nut cannot be locked. Summary of the invention

[0006] The purpose of the utility model is to provide a high temperature resistant and anti-seizure A286 self-locking fastener, which can lock the nut and meet the use of different working conditions, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high temperature resistant and anti-seizure A286 self-locking fastener, comprising a bolt head, a screw rod is fixed to the bottom of the bolt head, and a self-locking washer 1 is sleeved on the outside of the screw rod, a self-locking washer 2 is arranged below the self-locking washer 1, and a fixing plate is arranged below the self-locking washer 2, and a locking nut is arranged below the fixing plate;

[0008] A limiting plate is fixedly arranged on the top of the locking nut, and a lifting plate is arranged inside the limiting plate, a high temperature resistant film is arranged below the lifting plate, and the interior of the high temperature resistant film is filled with fastening glue, a glue flow groove is opened inside the locking nut, and a puncture nail is installed inside the glue flow groove.

[0009] Preferably, the tips of the puncture nails face the high temperature resistant film, and four groups of the puncture nails are provided.

[0010] Preferably, a limiting hole is provided inside the fixing plate, and a pushing rod is provided inside the limiting hole.

[0011] Preferably, a push plate is fixedly provided on the top of the push rod, and a support spring is installed between the push plate and the limiting hole.

[0012] Preferably, the support spring is sleeved on the outside of the push rod, and the push rod passes through the inside of the limiting hole.

[0013] Preferably, a wedge-shaped groove is provided at the connection between the self-locking gasket 1 and the self-locking gasket 2, and the wedge-shaped grooves on the self-locking gasket 1 and the self-locking gasket 2 are engaged with each other.

[0014] Preferably, the top surface of the self-locking gasket 1 is provided with a toothed surface, and the bottom surface of the self-locking gasket 2 is provided with a toothed surface.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Through the provided locking nut, the locking nut and the screw can be fixed by the fastening glue in the locking nut, so as to prevent the locking nut from falling off and causing the workpiece to loosen;

[0017] 2. The fixed sheet can pierce the high temperature resistant film as the locking nut is continuously fed, so that the fastening glue flows out. The locking nut does not need to be fixed, and the locking nut can be used alone without the fixed sheet. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the locking nut of the utility model;

[0021] Figure 3 For the utility model Figure 1 A magnified view of middle;

[0022] Figure 4 It is a schematic diagram of the half-section structure of the high temperature resistant film of the utility model.

[0023] Description of reference numerals:

[0024] 1. Bolt head; 2. Self-locking washer 1; 3. Self-locking washer 2; 4. Screw; 5. Locking nut; 51. Limiting plate; 52. Lifting plate; 53. High temperature resistant film; 54. Piercing nail; 55. Glue flow groove; 56. Fastening glue; 6. Fixing plate; 61. Push plate; 62. Limiting hole; 63. Push rod; 64. Support spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 4 A high temperature resistant and anti-seizure A286 self-locking fastener, comprising a bolt head 1, a screw rod 4 is fixed to the bottom of the bolt head 1, and a self-locking washer 2 is sleeved on the outside of the screw rod 4, a self-locking washer 2 is arranged below the self-locking washer 2, a fixing plate 6 is arranged below the self-locking washer 3, and a locking nut 5 is arranged below the fixing plate 6;

[0028] A limiting plate 51 is fixedly provided on the top of the locking nut 5, and a lifting plate 52 is provided inside the limiting plate 51, a high temperature resistant film 53 is provided below the lifting plate 52, and the interior of the high temperature resistant film 53 is filled with fastening glue 56, a glue flow groove 55 is opened inside the locking nut 5, and a puncture nail 54 is installed inside the glue flow groove 55, the nail tip of the puncture nail 54 faces the high temperature resistant film 53, and four groups of puncture nails 54 are provided.

[0029] By adopting the above technical scheme, when the puncture nail 54 pierces the interior of the high-temperature resistant film 53, the fastening glue 56 in the high-temperature resistant film 53 can flow out from the glue flow groove 55 and flow to between the locking nut 5 and the screw 4. The user does not need to prepare glue to achieve locking of the screw 4 and the locking nut 5, and the workpiece is installed between the locking nut 5 and the self-locking gasket 23, which can prevent the locking nut 5 from falling off and causing the workpiece to loosen. Under normal conditions, the high-temperature resistant film 53 does not contact the puncture nail 54 in the locking nut 5. Only when the high-temperature resistant film 53 is squeezed will it contact the puncture nail 54. A limit block is set on the top of the lifting plate 52. The lifting plate 52 cannot be separated from the limit plate 51 upward and can only move downward. At the same time, the lifting space of the lifting plate 52 is interconnected with the space where the high-temperature resistant film 53 is located.

[0030] Specifically, Figure 3 As shown, a limiting hole 62 is opened inside the fixing plate 6, and a pushing rod 63 is arranged inside the limiting hole 62, a pushing plate 61 is fixedly arranged on the top of the pushing rod 63, and a supporting spring 64 is installed between the pushing plate 61 and the limiting hole 62, the supporting spring 64 is sleeved on the outside of the pushing rod 63, and the pushing rod 63 passes through the inside of the limiting hole 62, a wedge groove is arranged at the connection between the self-locking gasket 1 2 and the self-locking gasket 2 3, and the wedge grooves on the self-locking gasket 1 2 and the self-locking gasket 2 3 are mutually engaged, the top surface of the self-locking gasket 1 2 is arranged with a tooth surface, and the bottom surface of the self-locking gasket 2 3 is arranged with a tooth surface.

[0031] By adopting the above technical solution, the top of the fixing plate 6 is pressed against the workpiece. As the locking nut 5 is continuously fed, the distance between the push plate 61 and the fixing plate 6 is shortened, thereby compressing the support spring 64 and pushing the push rod 63 through the limiting hole 62 and approaching the limiting plate 51. As the push rod 63 is continuously fed, the lifting plate 52 can move to the side close to the high temperature resistant film 53, thereby squeezing and deforming the high temperature resistant film 53, and the height of the high temperature resistant film 53 becomes smaller and the width increases, thereby being stuck in the glue flow groove 55 and contacting with the puncture nail 54 in the glue flow groove 55, so that the fastening glue 56 in the high temperature resistant film 53 can flow out from the glue flow groove 55.

[0032] Working principle: The fastener is made of A286 as a whole. The screw 4 passes through the self-locking gasket 1 2 and the self-locking gasket 2 3, and the fixing plate 6 and the locking nut 5 are installed at the bottom of the workpiece. The locking nut 5 is rotated. As the locking nut 5 is continuously fed, the top of the fixing plate 6 is pressed against the workpiece, and the distance between the push plate 61 and the fixing plate 6 is shortened, thereby compressing the support spring 64 and pushing the push rod 63 through the limiting hole 62 and approaching the limiting plate 51. As the push rod 63 is continuously fed, the lifting plate 52 can move close to the high temperature resistant film 53. The high temperature resistant film 53 is squeezed and deformed by moving one side, and the height of the high temperature resistant film 53 becomes smaller and the width increases, so that it can be stuck in the glue flow groove 55 and contact with the piercing nail 54 in the glue flow groove 55, so that the fastening glue 56 in the high temperature resistant film 53 can flow out of the glue flow groove 55 and flow to between the locking nut 5 and the screw 4. The screw 4 and the locking nut 5 can be locked without the user preparing glue, and the workpiece is installed between the locking nut 5 and the self-locking gasket 23, which can prevent the locking nut 5 from falling off and causing the workpiece to loosen.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A high temperature resistant and anti-seizure A286 self-locking fastener, comprising a bolt head (1), characterized in that: A screw rod (4) is fixed at the bottom of the bolt head (1), and a self-locking washer (2) is sleeved on the outside of the screw rod (4), a self-locking washer (3) is arranged below the self-locking washer (2), and a fixing plate (6) is arranged below the self-locking washer (3), and a locking nut (5) is arranged below the fixing plate (6); A limit plate (51) is fixedly arranged on the top of the locking nut (5), and a lifting plate (52) is arranged inside the limit plate (51), a high temperature resistant film (53) is arranged below the lifting plate (52), and the interior of the high temperature resistant film (53) is filled with fastening glue (56), and a glue flow groove (55) is opened inside the locking nut (5), and a puncture nail (54) is installed inside the glue flow groove (55).

2. A high temperature resistant and anti-seizure A286 self-locking fastener according to claim 1, characterized in that: The tips of the puncture nails (54) face the high temperature resistant film (53), and four groups of the puncture nails (54) are provided.

3. The high temperature resistant and anti-seizure A286 self-locking fastener according to claim 1, characterized in that: A limiting hole (62) is provided inside the fixing plate (6), and a pushing rod (63) is provided inside the limiting hole (62).

4. A high temperature resistant and anti-seizure A286 self-locking fastener according to claim 3, characterized in that: A pushing plate (61) is fixedly provided on the top of the pushing rod (63), and a supporting spring (64) is installed between the pushing plate (61) and the limiting hole (62).

5. A high temperature resistant and anti-seizure A286 self-locking fastener according to claim 4, characterized in that: The support spring (64) is sleeved on the outside of the push rod (63), and the push rod (63) passes through the inside of the limiting hole (62).

6. The high temperature resistant and anti-seizure A286 self-locking fastener according to claim 1, characterized in that: A wedge-shaped groove is provided at the connection between the self-locking gasket 1 (2) and the self-locking gasket 2 (3), and the wedge-shaped grooves on the self-locking gasket 1 (2) and the self-locking gasket 2 (3) are mutually engaged.

7. The high temperature resistant and anti-seizure A286 self-locking fastener according to claim 1, characterized in that: The top surface of the self-locking gasket 1 (2) is provided with a toothed surface, and the bottom surface of the self-locking gasket 2 (3) is provided with a toothed surface.

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