Thermocuring anti-loosening fastener and fastening method

Abstract

The invention provides a thermocuring anti-loosening fastener and a fastening method. The thermocuring anti-loose fastener comprises a stud and an anti-loose bolt, at least one prefabricated groove is formed in the stud, a nut is arranged on the nut, a thread is arranged on the nut, the stud is sleeved with the nut, a groove and a gasket are arranged on the thread, the gasket is arranged on the nut, the anti-loose bolt is connected with the stud and the nut through the prefabricated groove and the groove, and the anti-loose bolt comprises a base and anti-loose pins. The anti-loose pins are arranged on one side of the base and extend into the prefabricated grooves and the grooves, and the number of the anti-loose pins, the number of the prefabricated grooves and the number of the grooves correspond to each other. In addition, according to the fastening method of the fastener, the anti-loosening bolt is inserted into the nut, and the bolt, the stud and the nut are fastened through the anti-loosening bolt. In addition, when the fastening performance needs to be further enhanced, the fastening mode that the anti-loosening plug pin is heated and melted to fill the prefabricated groove and the groove and then cooled can be achieved.

Description

Technical Field

[0001] The invention relates to the field of universal fasteners, and in particular to a heat-curing anti-loosening fastener and a fastening method. Background Art

[0002] Fasteners play a vital role in the production, manufacturing and assembly of large electronic products due to their wide variety, different performances and uses, and high standardization, serialization and commonality.

[0003] The current mainstream tightening methods for anti-loosening bolts mainly include the following:

[0004] Pressure anti-loosening bolts: By applying preload pressure to the bolts, they will not loosen when subjected to vibration or pressure. The advantages are simple installation and wide applicability. The disadvantage is that the preload pressure needs to be accurately calculated, otherwise it may cause the bolts to crack or loosen;

[0005] Locking bolts: Use special locking devices, such as spring washers, to prevent the bolts from loosening. The advantages are easy installation and low maintenance costs. The disadvantage is that the locking device may wear out and need to be replaced regularly;

[0006] Chemical anti-loosening bolts: Use chemical adhesives to fix the bolts in the corresponding nuts or holes. The advantages are good anti-loosening effect and suitable for high temperature and humidity environments. The disadvantages are that it is difficult to install and disassemble, and may cause corrosion to the material surface;

[0007] Friction anti-loosening bolts: prevent loosening by increasing the friction between the bolt and the nut. The advantage is that it is easy to install and suitable for various environments. The disadvantage is that the tightening state of the bolt needs to be checked regularly to prevent excessive wear.

[0008] Therefore, existing anti-loosening bolts generally have the following defects:

[0009] The use of complex processing technology leads to high manufacturing costs;

[0010] A considerable number of anti-loosening bolts only improve the mechanical condition threshold of loosening to a limited extent, and cannot achieve sufficiently reliable anti-loosening;

[0011] Most anti-loosening bolts will become stuck after long-term use, making it difficult to disassemble. Violent disassembly often causes thread damage and even damage to the assembly base.

[0012] Most anti-loosening bolts lack obvious visual features when they become loose, which leads to the inability to carry out timely maintenance and reinforcement, thus causing loosening accidents. Summary of the invention

[0013] In view of the above technical problems, the present invention provides a heat-curing anti-loosening fastener and a fastening method.

[0014] The present invention provides a heat-curing anti-loosening fastener, which includes: a stud, at least one prefabricated groove is provided on the stud, a nut, a nut is provided with a thread, is sleeved on the stud, and has a groove on the thread, a washer, the washer is provided on the nut, and an anti-loosening pin, which is connected to the stud and the nut through the prefabricated groove and the groove, wherein the anti-loosening pin includes a base and an anti-loosening pin, which is provided on one side of the base and extends into the prefabricated groove and the groove, and the number of the anti-loosening pin, the prefabricated groove and the groove corresponds to each other.

[0015] The heat-curing anti-loosening fastener provided by the present invention may also have the following features: the anti-loosening pin is made of hot-melt material, and a retaining tooth is provided on the base, and the retaining tooth is engaged in the external thread on the stud.

[0016] The heat-curing anti-loosening fastener provided by the present invention may also have the following feature: a mounting groove is provided on the nut, and a washer is provided in the mounting groove.

[0017] The heat-curing anti-loosening fastener provided by the present invention may also have the following feature: the prefabricated groove is arranged on the outer side surface of the stud along the axial direction of the stud.

[0018] The heat-curing anti-loosening fastener provided by the present invention may also have the following characteristics: the number of prefabricated grooves is four, the four prefabricated grooves are evenly arranged on the stud, and the number of grooves on the nut is four.

[0019] The heat-curing anti-loosening fastener provided by the present invention may also have the following features: there are four anti-loosening pins, one end of each of the four anti-loosening pins is connected to a side surface of the base, and the interval between two adjacent anti-loosening pins on the base protrudes outward to form a retaining tooth.

[0020] In addition, the present invention also provides a method for fastening the above-mentioned heat-cured anti-loosening fastener, in which the fastening method comprises the following steps:

[0021] Drill holes for fasteners;

[0022] Insert the stud into the opening.

[0023] Screw the nut onto the stud and align the groove on the nut with the prefabricated groove on the stud.

[0024] Place the washer into the mounting groove on the nut.

[0025] The anti-loosening pin is inserted into the nut, and the anti-loosening pin extends into the prefabricated groove and the groove, and the anti-loosening tooth is engaged with the external thread on the stud.

[0026] In addition, the present invention also provides another fastening method of the above-mentioned heat-curing anti-loosening fastener, comprising the following steps:

[0027] Drill holes in the plate to be fastened;

[0028] Screw the first nut onto the stud and align the groove on the first nut with the prefabricated groove on the stud.

[0029] Place the first washer into the mounting groove on the first nut.

[0030] Align the opening of the plate with the stud and place it over the first nut;

[0031] Place the second gasket onto the plate.

[0032] Screw the second nut onto the stud and align the groove on the second nut with the prefabricated groove on the stud.

[0033] Insert the anti-loosening pin into the second nut so that the base of the anti-loosening pin is located in the installation groove of the second nut, and the anti-loosening pin extends downward into the groove of the first nut and the prefabricated groove of the stud, and the anti-retraction tooth is engaged with the external thread on the stud.

[0034] The above-mentioned fastening method also includes the following steps: when the anti-loosening pin is inserted, the anti-loosening pin is heated to melt the anti-loosening pin; after the anti-loosening pin is cooled, it is tightly connected with the prefabricated groove and the recess.

[0035] The beneficial effects of the present invention are:

[0036] The thermosetting anti-loosening fastener of the present invention includes a stud, a nut, a washer and an anti-loosening pin. The stud is provided with at least one prefabricated groove, and the nut is provided with an internal thread, which can be sleeved on the stud, and the thread is provided with a groove. The washer is provided on the nut. The anti-loosening pin includes a base and an anti-loosening pin. The anti-loosening pin is provided on one side of the base, and the anti-loosening pin extends into the nut, wherein the anti-loosening pin extends into the prefabricated groove of the stud and the groove on the nut, and the anti-loosening pin is connected with the stud and the nut through the insertion connection of the anti-loosening pin, so as to have a tightening effect on the stud and the nut. Moreover, the number of anti-loosening pins, prefabricated grooves and grooves corresponds to each other. Based on the structure of the heat-cured anti-loosening fastener, prefabricated grooves and recesses are respectively provided on the stud and nut, and part of the threads on the stud and nut are removed, so that when the threads of the stud and nut are stuck due to rust or other reasons, only a small force is needed to unscrew the nut from the stud, thereby protecting the stud, bolt and the opening of the fastener. Moreover, the structure of the fastener is relatively simple, the processing cost is low, and it can be mass-produced, helping users reduce production costs.

[0037] In addition, when the fixation between the nut and the stud fails, the prefabricated groove will be obviously misaligned, which helps maintenance personnel to easily observe and distinguish whether the bolt structure needs repair and reinforcement, facilitating the later maintenance of the bolt.

[0038] In addition, the anti-loosening pin is made of hot-melt material, which can be heated after being inserted into the nut, melted and filled into every corner and gap of the prefabricated groove and recess, which can not only effectively prevent rainwater and other external destructive factors from penetrating into the thread, but also reduce the rust of the bolt and extend its service life. Moreover, based on the material characteristics of the hot-melt material, the fastener can have better weather resistance.

[0039] In addition, a retaining tooth is provided on the anti-loosening pin, and the retaining tooth can engage with the thread on the stud when the anti-loosening pin is inserted into the nut, thereby further ensuring that the anti-loosening pin will not fall off from the nut.

[0040] In addition, the present invention also provides a fastening method for the above fastener, in which a locking pin is inserted into a nut, and the locking pin is used to fasten the stud and the nut. In addition, when the fastening needs to be further strengthened, the locking pin can be heated to melt and fill the prefabricated groove and the concave groove, and then cooled.

[0041] When the fastener is fastened by melting, it only needs to be heated to a certain temperature again to turn the anti-loosening pin into a molten state when it is removed. The melting of the anti-loosening pin will not only no longer hinder the loosening of the thread, but also provide lubrication for the thread rotation in the heated state. In addition, the difference in thermal expansion between the nut and the bolt will make the loosening operation easier. And the residual hot melt material after loosening does not affect the subsequent reuse of the studs and nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the structure of the stud in this embodiment;

[0043] Figure 2 is a schematic structural diagram of a nut in this embodiment;

[0044] Figure 3 is a schematic structural diagram of the gasket in this embodiment;

[0045] Figure 4 is a schematic diagram of the structure of the anti-loosening latch in this embodiment;

[0046] Figure 5 FIG. 1 is a schematic diagram of the process of fastening a method of a heat-cured anti-loosening fastener using double nuts in this embodiment;

[0047] Figure 6FIG. 1 is a schematic diagram of the process of fastening a method of a heat-cured anti-loosening fastener using double nuts in this embodiment;

[0048] Figure 7 FIG. 1 is a schematic diagram of the process of fastening a method of a heat-cured anti-loosening fastener using double nuts in this embodiment;

[0049] Figure 8 yes Figure 7 A magnified schematic diagram of center A. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] The heat-curing anti-loosening fastener in this embodiment is used to fasten the fastener to be fastened. In this embodiment, the fastener to be fastened is a plate structure with an opening.

[0052] like Figures 1 to 4 As shown, the heat-curing anti-loosening fastener comprises a stud 10 , a nut 20 , a washer 30 and an anti-loosening pin 40 .

[0053] The stud 10 is made of a temperature-resistant hard material and is a screw structure. An external thread is provided on the outer surface of the screw. At least one prefabricated groove 11 is provided on the external thread along the axial direction of the stud 10. In this embodiment, the number of the prefabricated grooves 11 is 4. The 4 prefabricated grooves 11 are evenly distributed on the outer surface of the stud 10.

[0054] The nut 20 is made of a heat-resistant hard material, and has an internal thread on its inner side, and the internal thread is provided with at least one groove 21. In this embodiment, the number of the grooves 21 is 4, and the 4 grooves 21 are evenly distributed on the inner side of the nut 20.

[0055] In addition, both ends of the nut 20 are respectively provided with mounting grooves 22. The mounting grooves 22 are located outside the internal thread.

[0056] The nut 20 can be rotatably connected to the stud 10 via an internal thread and an external thread on the stud 10 .

[0057] The washer 30 is made of a relatively soft weather-resistant material and has a hollow structure therein. The washer 30 is disposed in the mounting groove 22 on the nut 20 .

[0058] The anti-loosening pin 40 is made of hot-melt material and comprises a base 41 , an anti-loosening pin 42 and a retaining tooth 43 .

[0059] The middle of the base 41 is a hollow structure, and the area of ​​the hollow structure is similar to the cross-section of the stud 10 , so as to ensure that the base 41 can be sleeved on the stud 10 .

[0060] The number of the anti-loosening pins 42 corresponds to the number of the prefabricated grooves 11 and the grooves 21, which is four. One end of the four anti-loosening pins 42 is connected to one side of the base 41, located on the side of the hollow structure of the base 41, and the other end extends toward the direction of the principle base 41.

[0061] The retaining teeth 43 are arranged on the base 41 , and the retaining teeth 43 are formed on the base 41 at a portion between two adjacent anti-loosening pins 42 and protruding toward the hollow structure.

[0062] In addition, the fastening method of the above-mentioned heat-cured anti-loosening fastener includes single nut fastening and double nut fastening. Figures 5 to 8 , taking the double nut fastening method as an example to explain in detail:

[0063] like Figure 5 As shown:

[0064] (1): The fastener is a plate having a through hole;

[0065] (2): Screw the first nut onto the stud along the direction of the arrow, and align the groove on the first nut with the prefabricated groove on the stud. After the first nut is put on, place the first washer on the installation groove of the first nut;

[0066] (3): Then put the plate on the stud through the through hole, and then put the second washer in the same direction as the arrow;

[0067] (4): Then screw the second nut onto the stud, and align the groove on the second nut with the prefabricated groove on the stud;

[0068] like Figure 6 As shown:

[0069] (5): After the first nut and the second nut are screwed onto the stud, insert the anti-loosening pin along the direction of the arrow, through the groove on the nut and the prefabricated groove on the stud and into the nut. After insertion, the anti-loosening pin extends into the prefabricated groove and the groove.

[0070] At this time, if Figure 8 As shown, the retaining teeth 43 of the anti-loosening pin have been inserted into the threads of the stud, and the anti-loosening pin, the first nut, the second nut and the stud form a preliminary fastening structure.

[0071] If the tightness at this time does not meet the tightness requirements, or the working conditions are bad and the vibration intensity is high, the latch cannot be guaranteed to be stable only by the stopper teeth. Figure 7 As shown, perform the following steps:

[0072] (6): Use a heating tool to heat the anti-loosening pin. When the temperature reaches the melting point of the anti-loosening pin, the anti-loosening pin will melt. The melted anti-loosening pin penetrates into the prefabricated groove and recess as well as the internal thread and external thread. Stop heating and wait for natural cooling. After cooling, the anti-loosening pin, nut, and stud form a stronger fastening structure.

[0073] The above fastening method adopts a double nut structure. In other embodiments, a single nut structure can also be used for fastening according to actual fastening requirements. The fastening method is similar to the above double nut fastening structure, except that the plate is placed between the nut and the anti-loosening pin. After the nut is screwed onto the stud, a washer is placed, then the plate is placed, and finally the anti-loosening pin is inserted. After that, whether the anti-loosening pin needs to be heated can be considered according to the requirements.

[0074] In addition, when the fastening structure needs to be removed, if heating is not performed, the removal can be completed by simply pulling out the anti-loosening pin.

[0075] If the anti-loosening pin is heated during tightening, it will need to be heated again during removal. After the anti-loosening pin melts again, the anti-loosening pin can be taken out by utilizing the lubricity of the anti-loosening pin in the molten state.

[0076] According to the thermosetting anti-loosening fastener in the above embodiment, it includes a stud, a nut, a washer and an anti-loosening pin. At least one prefabricated groove is provided on the stud, and an internal thread is provided on the nut, which can be sleeved on the stud, and a groove is provided on the thread. The washer is provided on the nut. The anti-loosening pin includes a base and an anti-loosening pin. The anti-loosening pin is provided on one side of the base, and the anti-loosening pin extends into the nut, wherein the anti-loosening pin extends into the prefabricated groove of the stud and the groove on the nut, and the anti-loosening pin is connected with the stud and the nut through the insertion connection of the anti-loosening pin, so as to have a tightening effect on the stud and the nut. Moreover, the number of anti-loosening pins, prefabricated grooves and grooves corresponds to each other. Based on the structure of the heat-cured anti-loosening fastener, prefabricated grooves and recesses are respectively provided on the stud and nut, and part of the threads on the stud and nut are removed, so that when the threads of the stud and nut are stuck due to rust or other reasons, only a small force is needed to unscrew the nut from the stud, thereby protecting the stud, bolt and the opening of the fastener. Moreover, the structure of the fastener is relatively simple, the processing cost is low, and it can be mass-produced, helping users reduce production costs.

[0077] In addition, when the fixation between the nut and the stud fails, the prefabricated groove will be obviously misaligned, which helps maintenance personnel to easily observe and distinguish whether the bolt structure needs repair and reinforcement, facilitating the later maintenance of the bolt.

[0078] In addition, the anti-loosening pin is made of hot-melt material, which can be heated after being inserted into the nut, melted and filled into every corner and gap of the prefabricated groove and recess, which can not only effectively prevent rainwater and other external destructive factors from penetrating into the thread, but also reduce the rust of the bolt and extend its service life. Moreover, based on the material characteristics of the hot-melt material, the fastener can have better weather resistance.

[0079] In addition, a retaining tooth is provided on the anti-loosening pin, and the retaining tooth can engage with the thread on the stud when the anti-loosening pin is inserted into the nut, thereby further ensuring that the anti-loosening pin will not fall off from the nut.

[0080] In addition, the present invention also provides a fastening method for the above fastener, in which a locking pin is inserted into a nut, and the locking pin is used to fasten the stud and the nut. In addition, when the fastening needs to be further strengthened, the locking pin can be heated to melt and fill the prefabricated groove and the concave groove, and then cooled.

[0081] When the fastener is fastened by melting, it only needs to be heated to a certain temperature again to turn the anti-loosening pin into a molten state when it is removed. The melting of the anti-loosening pin will not only no longer hinder the loosening of the thread, but also provide lubrication for the thread rotation in the heated state. In addition, the difference in thermal expansion between the nut and the bolt will make the loosening operation easier. And the residual hot melt material after loosening does not affect the subsequent reuse of the studs and nuts.

[0082] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and the equivalent technology, the present application is also intended to include these modifications and variations.

Claims

1. A heat-curing anti-loosening fastener, characterized in that: include: A stud having at least one prefabricated groove, A nut, wherein the nut is provided with a thread, and is sleeved on the stud, wherein the thread is provided with a groove, a washer, the washer being arranged on the nut, An anti-loosening pin, wherein the anti-loosening pin is connected to the stud and the nut through the prefabricated groove and the groove, The anti-loosening pin includes a base and an anti-loosening pin, wherein the anti-loosening pin is arranged on one side of the base and extends into the prefabricated groove and the groove. The numbers of the anti-loosening pins, the prefabricated grooves and the grooves correspond to each other.

2. The heat-curing anti-loosening fastener according to claim 1, characterized in that: The anti-loosening pin is made of hot-melt material. The base is also provided with a back-stopping tooth, which is engaged in the external thread on the stud.

3. The heat-cured anti-loosening fastener according to claim 1, characterized in that: The nut is provided with a mounting groove, and the washer is arranged in the mounting groove.

4. The heat-cured anti-loosening fastener according to claim 1, characterized in that: The prefabricated groove is arranged on the outer side surface of the stud along the axial direction of the stud.

5. The heat-curing anti-loosening fastener according to claim 1, characterized in that: The number of the prefabricated grooves is four, and the four prefabricated grooves are evenly arranged on the studs. The number of the grooves on the nut is four.

6. The heat-cured anti-loosening fastener according to claim 5, characterized in that: The number of the anti-loosening pins is four, and one end of the four anti-loosening pins is respectively connected to a side surface of the base. The interval between two adjacent anti-loosening pins on the base protrudes outwards to form anti-retraction teeth.

7. A heat-curing anti-loosening fastening method, using the heat-curing anti-loosening fastener according to any one of claims 1 to 6, characterized in that: The following steps are involved: Drill holes for fasteners; Insert the stud into the opening. Screw the nut onto the stud and align the groove on the nut with the prefabricated groove on the stud. Place the washer into the mounting groove on the nut. The anti-loosening pin is inserted into the nut, and the anti-loosening pin extends into the prefabricated groove and the groove, and the anti-loosening tooth is engaged with the external thread on the stud.

8. The heat curing anti-loosening and fastening method according to claim 7, characterized in that: After the anti-loosening pin is inserted into the nut, the anti-loosening pin is heated so that the anti-loosening pin melts and fills the prefabricated groove and the groove, and is tightly fitted and connected with the prefabricated groove and the groove after cooling.

9. A heat-curing anti-loosening fastening method, using the heat-curing anti-loosening fastener according to any one of claims 1 to 6, characterized in that: The following steps are involved: Drill holes in the plate to be fastened; Screw the first nut onto the stud and align the groove on the first nut with the prefabricated groove on the stud. Place the first washer into the mounting groove on the first nut. Align the opening of the plate with the stud and place it over the first nut; Place the second gasket onto the plate. Screw the second nut onto the stud and align the groove on the second nut with the prefabricated groove on the stud. Insert the anti-loosening pin into the second nut so that the base of the anti-loosening pin is located in the installation groove of the second nut, and the anti-loosening pin extends downward into the groove of the first nut and the prefabricated groove of the stud, and the anti-retraction tooth is engaged with the external thread on the stud.

10. The heat curing anti-loosening and fastening method according to claim 9, characterized in that: When the anti-loosening pin is inserted, the anti-loosening pin is heated to melt the anti-loosening pin; After the anti-loosening pins are cooled, they are tightly connected to the prefabricated grooves and recesses.

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