Anti-loose and anti-disassembly nut assembly and packaging method thereof

Abstract

The present application relates to the technical field of fastener, in particular to a nut assembly for preventing loosening and unfastening and a packaging method thereof, the nut assembly is composed of a bolt, a nut and a protection structure, the protection structure includes a protection body with a protection cavity, a guide, an elastic support and an elastic end piece; the elastic support is arranged at one end of the protection cavity; the elastic end piece is detachable at the other end of the protection cavity; the elastic end piece, the guide, the nut, the bolt and the elastic support are distributed along the protection body in the axial direction, and the elastic support and the elastic end piece have a first elastic body and a second elastic body respectively; when the elastic end piece is pressed, the second elastic body supplies air to the nut and cleans it through the guide; when the elastic support is pressed, the bolt is exposed from the cavity opening of the protection cavity, when the elastic support recovers, the bolt is retracted into the protection cavity and wrapped by the first elastic body, the present application completes the cleaning of the nut and the bolt while packaging the beads, reduces the production process flow and ensures the production capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fasteners, in particular to a nut assembly for preventing loosening and disassembly and a packaging method thereof. BACKGROUND

[0002] The anti-loosening and anti-disassembly nut, also known as "anti-theft nut" (hereinafter referred to as "nut"), is one of the more mature fasteners in the prior art (for reference, see the anti-theft nut disclosed in the authorized announcement No. CN201818623U). The general structure of the nut is that an anti-theft groove (also known as anti-disassembly groove, hereinafter the same) is arranged on the inner wall of the nut, and an anti-theft piece (such as a steel ball, hereinafter the same) is arranged in the anti-theft groove. Since the depth of the anti-theft groove increases in the thread direction, when the nut and bolt are assembled and have signs of loosening, the anti-theft piece moves from the deep end of the anti-theft groove to the shallow end of the anti-theft groove, thereby blocking the bolt from being unscrewed, achieving the purpose of preventing loosening and disassembly.

[0003] At present, in the last step of producing the anti-theft nut, the anti-theft piece needs to be put into the anti-theft groove of the nut, and a sleeve is added to prevent the anti-theft piece from falling off, thereby completing the production of the anti-theft nut, so as to facilitate subsequent packaging, warehousing and sales. For example, the applicant applied for a patent No. ZL202010068749.5 on January 21, 2020, an anti-theft nut automatic assembly production line. In this invention, the applicant successfully put the anti-theft piece into the nut, and achieved the purpose of preventing the anti-theft piece from falling off during warehousing and sales. However, it is found in actual production that, since the nut itself needs to be tapped, slotted and processed, it is difficult to ensure that the process is carried out in a dust-free workshop, which leads to the phenomenon that impurities are adsorbed on the inner thread of the nut. During the assembly of the sleeve and the nut, the impurities on the inner thread will scratch the nut due to the relative movement between the sleeve and the nut (not only that, the impurities will also affect the smooth assembly of the nut and the bolt during the actual assembly and use of the nut and the bolt). Therefore, the inner ring of the nut needs to be cleaned before the sleeve and the nut are assembled, so that the enterprise needs to specially increase a cleaning production line for the nut to ensure the qualified rate of the product and increase the economic burden of the enterprise.

[0004] In addition, when the nut is sold, it is generally sold with a matching bolt. Since the structure of the bolt is different from that of the nut, the existing nut and bolt are sold in separate packages (packaged separately), that is, since the bolt has an external thread, a protective mesh sleeve needs to be sleeved on the bolt during packaging to avoid damaging the external thread of the bolt during transportation, movement and handling. However, the bolt also has the same problem as the nut during production, that is, the bolt also needs to be cleaned before packaging. Since the structure of the bolt is different from that of the nut, the cleaning requirements of the two are different, so it is generally difficult to use the same cleaning equipment as the nut.

[0005] Third, when selling bolts, because the external thread of the bolt is located on the outer wall of the bolt, customers are usually concerned that the thread will be damaged due to bumps and the like, and therefore usually check the thread of the bolt when purchasing (because the thread of the nut is arranged on the inner ring of the nut, it is generally not damaged), and in order to ensure the protection of the bolt by the net cover (hereinafter referred to as "net cover"), the net cover is usually fixed on the bolt by means such as adhesion, and the adhesion can be easily removed, so that a balance is reached between protecting the bolt and facilitating inspection, but the adhesion has the disadvantage of being disposable, and after the net cover is removed, the net cover loses the adhesion and is easily detached from the bolt, so that the bolt cannot be more stably protected.

[0006] In view of the above, it is necessary to make necessary improvements to solve the above technical problems. SUMMARY

[0007] In view of the deficiencies in the prior art, the purpose of the present application is to provide a nut assembly that prevents loosening and disassembly and a packaging method thereof, aiming to solve the problems in the background art.

[0008] The technical scheme of the present application is as follows: a nut assembly that prevents loosening and disassembly, characterized by comprising a bolt, a nut, and a protection structure, wherein the protection structure comprises:

[0009] a protection body having a protection cavity that accommodates the bolt and the nut and penetrates both ends;

[0010] a guide member detachably arranged in the protection cavity and having at least a guide cavity and an air guide cavity, the guide cavity being used to guide the anti-theft member into the anti-theft groove of the nut, and the air guide cavity being capable of introducing air flow to blow against the inner ring wall of the nut;

[0011] an elastic support member arranged at one end of the protection cavity and having a central cavity through which the threaded shank of the bolt penetrates and penetrates the elastic support member;

[0012] an elastic end member arranged at the other end of the protection cavity and detachably connected with the protection body;

[0013] wherein the elastic end member, the guide member, the nut, the bolt, and the elastic support member are distributed axially along the protection body, and the elastic support member and the elastic end member each have a first elastic body and a second elastic body;

[0014] When the elastic end member is pressed, the second elastic body supplies air to the inner ring wall of the nut through the air guide cavity and cleans the nut, and causes the guide member to be inserted into the nut and abut against the bolt, and then the output end of the guide cavity causes the anti-theft member to enter the anti-theft groove;

[0015] When the elastic support is compressed, the threaded shank of the bolt is exposed from the cavity mouth of the protection cavity, and when the elastic support is restored, the threaded shank of the bolt is retracted into the protection cavity and is wrapped by the first elastic body.

[0016] Preferably, the elastic support comprises:

[0017] A first annular block is connected to the protection body and is located at the cavity mouth of the protection cavity, and the first annular block has an outlet of the central cavity;

[0018] A second annular block is spaced apart from the first annular block and is located in the protection cavity, and the second annular block has an inlet of the central cavity;

[0019] A first folding body is connected between the first annular block and the second annular block and has a first folding cavity capable of being deformed;

[0020] A first reset spring is arranged in the first folding cavity and abuts against the first annular block and the second annular block at two ends, respectively;

[0021] Preferably, the first folding body forms the central cavity, and a collection area is formed between the first folding body and the protection cavity.

[0022] Preferably, the first annular block is provided with an exhaust one-way valve and a return gas one-way valve which are in communication with the first folding cavity.

[0023] Preferably, the elastic end piece comprises:

[0024] A positioning annular block is detachably connected to one end of the protection cavity away from the elastic support and has an exhaust port matched with the air guide cavity;

[0025] A pressing block is spaced apart from the positioning annular block;

[0026] A second folding body is connected between the positioning annular block and the pressing block and has a second folding cavity in communication with the exhaust port;

[0027] A plurality of positioning columns are connected to the pressing block and extend upward to the positioning annular block, and the positioning columns pass through positioning ports provided on the positioning annular block, and the positioning columns are distributed at equal intervals in a circumferential direction with the exhaust port as a center;

[0028] A second reset spring is connected between the positioning annular block and the pressing block and is coaxially arranged with the positioning columns;

[0029] Preferably, the pressing block is provided with a plurality of air inlet holes in communication with the second folding cavity.

[0030] Preferably, the guide comprises:

[0031] An inner tube has the air guide cavity and is matched with the exhaust port at one end.

[0032] An air inlet one-way valve is installed in the air inlet cavity;

[0033] The outer tube is coaxially arranged with the inner tube, and the guide cavity is formed between the inner tube and the outer tube;

[0034] One end of the inner tube is formed with a plug body structure capable of being inserted into the nut.

[0035] Preferably, the plug body structure comprises:

[0036] The plug sleeve is integrally formed on the inner tube, and the cross-sectional diameter gradually decreases axially;

[0037] The annular stop edge is arranged on the top end surface of the plug sleeve;

[0038] The limiting stop edge is integrally formed on one end of the outer tube, and is arranged in a staggered manner with the annular stop edge;

[0039] The annular stop edge and the limiting stop edge are respectively provided with a discharging port capable of being staggered or communicated with each other, and a third return spring is connected between the annular stop edge and the outer tube;

[0040] The outer wall of the outer tube is integrally formed with an annular stress part, and when the positioning column passes through the positioning port and abuts against the annular stress part, the outer tube and the inner tube can move axially relative to each other and make the discharging ports communicate with each other.

[0041] Preferably, the inner wall of the protection cavity is provided with an axially extending positioning groove, and the annular stress part is provided with a positioning rib capable of moving in the positioning groove;

[0042] The inner wall of the protection cavity is provided with a clamping port, and the positioning ring block is provided with a clamping portion matched with the clamping port.

[0043] Preferably, the inner tube is formed with a filter cap at the end away from the plug sleeve, the filter cap is formed with a filter cavity communicating with the air inlet cavity, and the outer wall of the filter cap is formed with a filter hole communicating with the filter cavity.

[0044] In addition, the application also discloses a packaging method of the nut assembly, which is suitable for packaging the anti-loose and anti-disassembly nut assembly, and comprises the following steps:

[0045] S1: preparing a protection body with an elastic supporting piece, and sequentially placing a bolt, a nut and a guide piece into a protection cavity;

[0046] S2: taking at least one anti-theft steel ball and placing it into the guide cavity of the guide body;

[0047] S3: aligning the elastic end piece with the other end of the protection body, and installing the positioning ring block of the elastic end piece on the protection body through the clamping portion.

[0048] Wherein, in step S3, the positioning ring block is positioned through the exhaust port and the inner tube of the guide, and after the elastic end piece is installed, the pressing block is pressed and the anti-theft steel ball in the guide enters the anti-theft groove of the nut, at the same time, the bolt presses the elastic support and the stud is exposed from one end of the protective body to complete the packaging, and the stud is checked.

[0049] Preferably, in step S3, when the pressing block of the elastic end piece is pressed, the air inlet hole is covered by the pressing tool, the gas in the second folding cavity is first extruded from the air inlet cavity, and the nut is cleaned, then the pressing block contacts the guide and the sleeve is clamped into the nut;

[0050] In step S3, when the elastic support is extruded, the gas in the first folding cavity is sprayed out, and the stud gradually exposed from the central cavity is cleaned;

[0051] In step S3, when the pressing block loses pressing, the first folding body and the second folding body reset; when the first folding body resets, the air return one-way valve exhausts and guides the impurities on the surface of the bolt into the collection area; when the second folding body resets, the positioning column resets, the limiting edge rises and causes each blanking port to be misaligned again.

[0052] The present application has at least the following beneficial effects:

[0053] 1. The nut sleeve provided by the present application comprises a nut (anti-loose and anti-removal nut, the same below), a bolt matched with the nut, and a protective structure for protecting the nut and the bolt from being damaged, so that the matched nut and bolt can be packaged together, which makes the nut and bolt production complete without entering separate packaging processes (such as nut steel ball filling and bolt netting), and the present application can clean the nut and bolt simultaneously when packaging them, so that the nut cleaning, bolt cleaning and packaging processes are synchronized, and at least four packaging processes such as nut cleaning, bolt cleaning, nut steel ball filling and bolt netting are saved, thereby optimizing the packaging process and improving enterprise output.

[0054] 2. After packaging, the present application protects the bolt by using the elastic support and the protective body of the external device, avoids the wear of the external thread of the bolt, and at the same time, during the sales inspection, the bolt stud can be exposed by pressing the elastic support, so as to facilitate the inspection of the purchaser or customer; and after inspection, the stud is retracted into the protective body, which does not affect the continued protection of the stud.

[0055] 3. The present application uses the elastic support and the elastic end piece to clean the bolt and the nut respectively when packaging, that is, the first folding body of the elastic support (i.e. the first elastic body in the present application) and the second folding body of the elastic end piece (i.e. the second elastic body in the present application) are extruded when packaging, so that the bolt and the nut are cleaned by the gas generated by the extrusion of the two, and the cleaning process is synchronized with the end piece and the steel ball filling, saving time.

[0056] 4. The first folding body resets when the present application is packaged, and the impurities cleaned from the nut can be sucked into the collection area, so that during the handling or transportation process, the impurities are prevented from returning to the nut due to the overturning of the kit of the present application.

[0057] In addition, other advantages of the present application will be shown in the embodiments of the present application, so that the beneficial effects of the present application are more significant. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0059] Figure 1 is a structural schematic diagram of embodiment 1 of the present application;

[0060] Figure 2 is an exploded view of embodiment 1 of the present application;

[0061] Figure 3 is Figure 1 A-A sectional view in the

[0062] Figure 4 is a structural schematic diagram of the elastic support in embodiment 1 of the present application;

[0063] Figure 5 is Figure 3 A enlarged view of part A in the

[0064] Figure 6 is a structural schematic diagram of the elastic end piece in embodiment 1 of the present application;

[0065] Figure 7 is Figure 3 B enlarged view of part B in the

[0066] Figure 8 is a structural schematic diagram of the guide in embodiment 1 of the present application;

[0067] Figure 9 Fig. 2 is a schematic view of the structure of the nut assembly of the present application; Figure 3 Fig. 3 is an enlarged view of part C in Fig. 2;

[0068] Figure 10 Fig. 4 is a schematic view of the structure of a specific embodiment 2 of the present application;

[0069] Figure 11 Fig. 5 is a schematic view of the structure of a pressing machine in the specific embodiment 2 of the present application;

[0070] Figure 12 Fig. 6 is a schematic view of the structure of an upper die plate in the specific embodiment 2 of the present application;

[0071] Figure 13 Fig. 7 is a schematic view of the cross section of a transmission block in the specific embodiment 2 of the present application. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0073] Embodiment 1, as shown in Fig. 1, includes: Figures 1-9

[0074] The present embodiment discloses a nut assembly for preventing loosening and dismounting, which is composed of a bolt 10, a nut 11 and a protection structure 2. The inner ring wall of the nut 11 is provided with an anti-theft groove 110.

[0075] In the present embodiment, the protection structure as a whole can be made of plastic material (some of its parts can be obtained according to the prior art), and the protection structure 2 of the present embodiment includes:

[0076] a protection body 20 having a protection cavity 21 for accommodating the bolt 10 and the nut 11 and penetrating through both ends;

[0077] a guide 22 detachably arranged in the protection cavity 21 and having at least a guide cavity and an air guide cavity, the guide cavity being used for guiding the anti-theft member into the anti-theft groove 110 of the nut 11, and the air guide cavity being capable of introducing airflow to the inner ring wall of the nut 11;

[0078] an elastic support 23 arranged at one end of the protection cavity 21 and having a central cavity 230 for the threaded shank of the bolt 11 to penetrate through and pass through the elastic support 23;

[0079] an elastic end piece 24 arranged at the other end of the protection cavity 21 and detachably connected with the protection body 20;

[0080] ​The elastic end piece 24, the guide 22, the nut 11, the bolt 10 and the elastic support 23 are distributed along the protection body 20 in an axial direction, and the elastic support 23 and the elastic end piece 24 are respectively provided with a first elastic body and a second elastic body;

[0081] When the elastic end piece 24 is pressed, the second elastic body supplies air to the inner ring wall of the nut 11 through the air guide cavity and cleans the nut 11, and causes the guide to be inserted into the nut 11 and abut against the bolt 10, and then the output end of the guide cavity causes the anti-theft piece to enter the anti-theft slot 110.

[0082] When the elastic support 23 is pressed, the stud 100 of the bolt 10 is exposed from the cavity opening of the protection cavity 21, and when the elastic support 23 returns, the stud 100 of the bolt 10 is retracted into the protection cavity 21 and is wrapped by the first elastic body.

[0083] Reference Figures 3-5 In the embodiment, the elastic support 23 comprises:

[0084] A first annular block 231 is threadedly connected to the protection body 20 and is located at the cavity opening of the protection cavity 21, and the first annular block 231 is provided with an outlet 230a of the central cavity 230;

[0085] A second annular block 232 is arranged in the protection cavity 21 and is spaced apart from the first annular block 231, and the second annular block 232 is provided with an inlet 230b of the central cavity 230;

[0086] A first folded body 233 (a first elastic body in the embodiment) is connected between the first annular block 231 and the second annular block 232 and is provided with a first folded cavity 233a capable of being deformed, and the first folded body 233 can be made of rubber;

[0087] A first reset spring 234 is arranged in the first folded cavity 233a and abuts against the first annular block 231 and the second annular block 232 at two ends respectively;

[0088] The first folded body 233 forms the central cavity 230, and a collection area 233c is formed between the first folded body 233 and the protection cavity 21, and cotton 233d for filtering is placed on the first annular block 231 when the elastic support 23 is installed, a first sealing ring 231a is arranged on the first annular block 231, and a notch 232a in communication with the collection area 233c is arranged on the second annular block.

[0089] Reference Figure 4 And Figure 5 In the embodiment, the first annular block 231 is provided with an air exhaust one-way valve 40 in communication with the first folded cavity 233a and an air return one-way valve 41 in communication with the first folded cavity 233a.

[0090] Reference Figure 3 、 Figures 6-7 The elastic end piece 24 comprises:

[0091] A positioning ring block 240 is detachably connected to the end of the protection cavity 21 away from the elastic support 23, and has an air outlet 240a adapted to the air guide cavity;

[0092] An extrusion block 241 is arranged at intervals with the positioning ring block 240;

[0093] A second folding body 242 (the second elastic body in the embodiment) is connected between the positioning ring block 240 and the extrusion block 241, and has a second folding cavity 242a in communication with the air outlet 240a;

[0094] A plurality of positioning columns 243 are connected to the extrusion block 241, and extend towards the positioning ring block 240, and the positioning ring block 240 is provided with positioning openings 243a through which the positioning columns 243 pass, and the positioning columns 243 are distributed at equal intervals around the air outlet 240a as the center;

[0095] A second reset spring 244 is connected between the positioning ring block 240 and the extrusion block 243, and is coaxially arranged with the positioning columns 243;

[0096] The extrusion block 241 is provided with a plurality of air inlet holes 241b in communication with the second folding cavity 242a.

[0097] Reference Figure 3 、 Figures 8-9 In the embodiment, the guide 22 comprises:

[0098] An inner tube 220 has the air guide cavity 220a, and one end is adapted to the air outlet, and in the embodiment, the outer wall of the inner tube 220 is further provided with a second sealing ring 220c, and the top of the inner tube in the embodiment is provided with a telescopic tube head 220d, the outer side wall of the tube head 220d is provided with an air inlet hole 220b, and a spring 220e is connected between the tube head 220d and the inner tube 220;

[0099] An air guide one-way valve 221 is installed in the air guide cavity 220a;

[0100] An outer tube 222 is coaxially arranged with the inner tube 220, and forms the guide cavity 222a with the inner tube 220, and in the embodiment, the guide cavity 222a is divided into two by a partition 222b, and corresponds to the anti-theft slot 110 of each nut 11 respectively;

[0101] One end of the inner tube 220 forms a plug structure capable of being plugged into the nut 11.

[0102] In the embodiment, the plug body structure comprises:

[0103] The plug sleeve 50 is integrally formed on the inner tube 220 and has a gradually reduced diameter in the axial direction. The outer wall of the plug sleeve 50 is provided with a gas injection port 500.

[0104] The annular stop edge 51 is arranged on the top end surface of the plug sleeve 50.

[0105] The limiting stop edge 52 is integrally formed on one end of the outer tube 222 and is arranged in a staggered manner with the annular stop edge 51.

[0106] The annular stop edge 51 and the limiting stop edge 52 are respectively provided with a discharging port 53 capable of being staggered or communicated with each other, and the third return spring 54 is connected between the annular stop edge 51 and the outer tube 222.

[0107] The outer wall of the outer tube 222 is integrally provided with an annular stress receiving portion 60. When the positioning column 243 passes through the positioning port 243a and abuts against the annular stress receiving portion 60, the outer tube 222 and the inner tube 220 can be relatively moved in the axial direction and the discharging ports 53 are communicated with each other. The bottom of the guide cavity 222a is arranged to be inclined to the direction of the discharging port 53, so that the anti-theft steel ball can roll to the discharging port 53 position.

[0108] In the embodiment, the inner wall of the protection cavity 21 is provided with an axially extending positioning groove 210, and the annular stress receiving portion 60 is provided with a positioning rib 610 capable of moving in the positioning groove 210.

[0109] The inner wall of the protection cavity 21 is provided with a clamping port 21a, and the positioning ring block 240 is provided with a clamping portion 21b matched with the clamping port 21a.

[0110] In the embodiment, in order to facilitate the cleaning of the nut and the impact and damage between the nut and the bolt, the nut is provided with a rubber head 110a. When assembled, the nut and the bolt have a gap, which facilitates the discharge of impurities on the nut. When the nut is placed, the impact caused by the falling of the nut can be avoided to cause wear on the surface of the bolt or the nut.

[0111] The embodiment provides a packaging method of a nut assembly, comprising the following steps:

[0112] S1: preparing a protection body with an elastic support, and sequentially placing a bolt, a nut and a guide in a protection cavity, placing the bolt first, inserting the stud of the bolt into the center cavity, then placing the nut, and then placing the guide in the protection body;

[0113] S2: taking two anti-theft steel balls (the nut of the embodiment has two anti-theft grooves), and placing the anti-theft steel columns in the respective guide cavities of the guide body.

[0114] S3: align the elastic end piece with the other end of the protection body, and install the positioning ring block of the elastic end piece on the protection body through the clamping part;

[0115] In step S3, the positioning ring block is positioned by the exhaust port and the inner tube of the guide, and after the installation of the elastic end piece is completed, the inner tube is inserted into the second folding cavity, the pressing block is pressed and the anti-theft steel ball in the guide enters the anti-theft groove of the nut, at the same time, the bolt extrudes the elastic support and is exposed from the end of the protection body, and the packaging is completed, and the bolt is checked.

[0116] In this embodiment: in step S3, when the pressing block of the elastic end piece is pressed, the air inlet hole is covered by the pressing device, the gas in the second folding cavity is first extruded from the air guide cavity, and the nut is cleaned, then the pressing block contacts the guide and the sleeve is clamped into the nut;

[0117] In step S3, when the elastic support is extruded, the gas in the first folding cavity is sprayed out, and the bolt gradually exposed from the central cavity is cleaned;

[0118] In step S3, when the pressing block loses pressing, the first folding body and the second folding body reset; when the first folding body resets, the air return one-way valve sucks air, and the impurities on the surface of the bolt are guided into the collection area; when the second folding body resets, the positioning column resets, the limiting edge rises and causes the each blanking port to be re-displaced

[0119] Reference Figures 1-9 The principle and advantages of the embodiment are:

[0120] 1. Cleaning of the inner ring wall of the nut during assembly That is: during assembly, first, the elastic support is installed on the protection body, then the bolt and the nut are sequentially placed into the protection cavity, then the positioning rib of the annular stress part and the positioning groove are matched and aligned and placed into the guide to the protection cavity, finally, the elastic end piece is installed at the cavity opening of the protection cavity, and the assembly is completed.

[0121] After the preliminary assembly is completed, the pressing block is pressed (wearing labor gloves when pressing manually), when pressing, the air inlet hole on the pressing block is closed, and the gas in the second folding cavity is extruded out, the gas in the second folding cavity enters the sleeve through the air guide cavity of the inner tube, and is sprayed out from the air outlet of the sleeve, and the inner ring wall of the nut is cleaned.

[0122] When the pressing block contacts the tube head on the inner tube in the second folding cavity, the inner tube descends as a whole, causing the plug sleeve to enter the nut until the discharge port aligns with the anti-theft groove of the nut. Then, the pressing block continues to descend and, after abutting against the annular force-bearing part through the positioning pin, drives the outer tube to descend (the tube head is also pressed synchronously), thereby aligning the discharge ports on the annular stop edge and the limit stop edge with each other, so that the anti-theft steel ball enters the anti-theft groove through the discharge port.

[0123] When the pressing block continues to be pressed, the tube head moves to its limit position and drives the bolt down through the guide, squeezing the first fold body, so that the bolt is gradually exposed from the central cavity (that is, one end of the protective cavity). During this process, the gas in the first fold cavity is squeezed out and the stud part of the bolt is cleaned. When the stud of the bolt is exposed, it can be inspected. After the inspection is completed, the pressing block is released.

[0124] 2. After assembly, when the first fold body is reset, impurities in the protective cavity can be guided to the collection area: that is, when the first fold body is reset, the gas in the collection area is drawn into the first fold cavity by the return gas check valve. At this time, the impurities located on the second annular block (the impurities cleaned off the nut) are drawn into the collection area from the notch and adsorbed on the cotton (which plays the role of filtering impurities. In other embodiments, it can also be replaced by a filter screen structure. Compared with the filter screen, cotton also has the advantage of making impurities "stick" to the cotton). When transporting or handling the nut assembly, it is prevented that impurities will return to the nut.

[0125] In summary, the protective structure of this embodiment can provide all-round protection for nuts and bolts, and can clean nuts and bolts during assembly. Furthermore, it facilitates the inspection of bolt studs during the sale process.

[0126] It is worth mentioning that, in order to reduce the production pressure on enterprises, the production of protective structures can be outsourced to other processing enterprises, while the bolt and nut manufacturers can be responsible for purchasing protective structures. This not only solves the problem of high production pressure on enterprises, but also drives the development of upstream enterprises. Furthermore, the processing enterprises of protective structures can recycle the protective structures to achieve resource reuse.

[0127] Example 2 differs from Example 1 in that:

[0128] like Figures 10-13 As shown, in this embodiment: a filter cap 70 is formed at the end of the inner tube head 220d away from the plug sleeve 50. A filter cavity communicating with the air intake chamber 220a is formed inside the filter cap 70. Filter holes communicating with the filter cavity are formed on the outer wall of the filter cap 70. In this embodiment, the filter cap 70 is a filter screen wrapped around the outer wall of the tube head 220d to filter the gas entering the air intake chamber from the second folded cavity.

[0129] In the embodiment, the pipe head 220d is rotationally connected with a driven shaft 80, the driven shaft 80 passes through the extrusion plate 241 and is formed with a driven groove 81.

[0130] In the embodiment, the annular force receiving part 60 is cancelled with the positioning ribs, and the inner wall of the protection cavity is also cancelled with the positioning grooves; the extrusion block of the embodiment is cancelled with the air inlet holes, and instead, the one-way air inlet valve 85 is arranged on the second folding body 242.

[0131] In the embodiment, the inlet 230b of the second annular block 232 is rotationally connected with a rotating disc 83, the bottom of the rotating disc 83 is provided with an annular slide rail 830, the second annular block 232 is provided with an annular slide groove matched with the annular slide rail, and the rotating disc 83 is rotated at the position of the inlet 230b by means of the annular slide rail. Similarly, the rotating disc 83 is coaxially provided with an opening for the bolt to pass through.

[0132] As shown in Figures 11-13 The embodiment also provides a pressing machine, which can drive the anti-theft steel ball into the anti-theft groove and clean the nut and the bolt at the same time. The pressing machine comprises a machine base 90 and a machine cover 92 connected with the machine base 90 through a support 91. The machine base 90 is rotationally connected with a lead screw 94 controlled by a first motor 93, the lead screw 94 is matched with a lead screw seat 95, the lead screw seat 95 is provided with an upper die plate 96, the machine base 90 is provided with a lower die cylinder 97, the lower die cylinder 97 is provided with a fastening bolt 970, and in use, the protection body can be placed in the lower die cylinder 97 and can be fixed by the fastening bolt 970.

[0133] In the embodiment, the upper die plate 96 is composed of a main plate 960 and a secondary plate 961, the main plate 960 is rotationally connected with a transmission block 962 matched with the driven groove 81, the transmission block 962 is driven to rotate clockwise or counterclockwise by a second motor 963, and the main plate 960 is further provided with two lifting push rods 964 (such as electric push rods or air cylinders), which can control the lifting movement of the secondary plate 961.

[0134] In the embodiment, the transmission block 962 and the sidewall of the driven groove 81 are provided with a clamping rib 962a and a clamping groove (not shown in the figure) matched with each other.

[0135] Referring to Figures 10-13 , the principle of the embodiment is that:

[0136] When the nut is cleaned, the extrusion block is controlled to continue to descend, and the annular force receiving portion is driven to descend by the positioning column to open the discharging port, so that the anti-theft steel ball enters the anti-theft groove, and then the sub-plate rises and is separated from the extrusion block.

[0137] When the nut is cleaned, the extrusion block is controlled to continue to descend, and the annular force receiving portion is driven to descend by the positioning column to open the discharging port, so that the anti-theft steel ball enters the anti-theft groove, and then the sub-plate rises and is separated from the extrusion block.

[0138] When the nut is cleaned, the extrusion block is controlled to continue to descend, and the annular force receiving portion is driven to descend by the positioning column to open the discharging port, so that the anti-theft steel ball enters the anti-theft groove, and then the sub-plate rises and is separated from the extrusion block.

[0139] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A nut kit for preventing loosening and disassembly, characterized in that: It is composed of a bolt (10), a nut (11) and a protection structure (2), wherein the protection structure (2) comprises: a protection body (20) having a protection cavity (21) for accommodating the bolt (10) and the nut (11) and penetrating through both ends; a guide (22) detachably arranged in the protection cavity (21) and having at least a guide cavity for guiding the anti-theft piece into the anti-theft slot (110) of the nut (11) and an air guide cavity capable of introducing airflow to the inner wall of the nut (11); an elastic support (23) arranged at one end of the protection cavity (21) and having a central cavity (230) for the stud of the bolt (10) to pass through and penetrate through the elastic support (23); an elastic end piece (24) arranged at the other end of the protection cavity (21) and detachably connected with the protection body (20); wherein the elastic end piece (24), the guide (22), the nut (11), the bolt (10) and the elastic support (23) are distributed along the protection body (20) in the axial direction, and the elastic support (23) and the elastic end piece (24) respectively have a first elastic body and a second elastic body; when the elastic end piece (24) is pressed, the second elastic body supplies air to the inner wall of the nut (11) through the air guide cavity and cleans the nut (11), and causes the guide to abut against the bolt (10) after being inserted into the nut (11), and then the output end of the guide cavity causes the anti-theft piece to enter the anti-theft slot (110); when the elastic support (23) is pressed, the stud (100) of the bolt (10) is exposed from the cavity opening of the protection cavity (21), and when the elastic support (23) recovers, the stud (100) of the bolt (10) is retracted into the protection cavity (21) and is wrapped by the first elastic body; the elastic support (23) comprises: a first annular block (231) connected to the protection body (20) and located at the cavity opening of the protection cavity (21), the first annular block (231) having an outlet (230a) of the central cavity (230); a second annular block (232) arranged in the protection cavity (21) and spaced apart from the first annular block (231), the second annular block (232) having an inlet (230b) of the central cavity (230); a first folding body (233) connected between the first annular block (231) and the second annular block (232) and having a first folding cavity (233a) capable of deforming; a first reset spring (234) arranged in the first folding cavity (233a) and abutting against the first annular block (231) and the second annular block (232) at both ends; wherein the first folding body (233) forms the central cavity (230), and a collection area (233c) is formed between the first folding body (233) and the protection cavity (21).

2. The anti-loosening and anti-unthreading nut assembly according to claim 1, characterized in that: The first annular block (231) is provided with an air exhaust one-way valve (40) and an air return one-way valve (41) which are in communication with the first folding cavity (233a).

3. A lock nut assembly according to claim 1 or 2, wherein: the elastic end piece (24) comprises: A positioning ring block (240) is detachably connected to one end of the protection cavity (21) away from the elastic support (23), and has a gas exhaust port (240a) matched with the air guide cavity; A pressing block (241) is arranged in space with the positioning ring block (240); A second folding body (242) is connected between the positioning ring block (240) and the pressing block (241), and has a second folding cavity (242a) in communication with the gas exhaust port (240a); A plurality of positioning columns (243) are connected to one end of the pressing block (241), extend towards the positioning ring block (240), and are provided with positioning ports (243a) on the positioning ring block (240) for the positioning columns (243) to pass through, and the positioning columns (243) are distributed in a circumferential equidistant manner with the gas exhaust port (240a) as the center; A second reset spring (244) is connected between the positioning ring block (240) and the pressing block (241), and is coaxially arranged with the positioning columns (243). The pressing block (241) is provided with a plurality of air inlet holes (241b) in communication with the second folding cavity (242a).

4. A lock washer and nut assembly according to claim 3 wherein: The guide member (22) comprises: An inner tube (220) having the air guide cavity (220a) and one end matched with the gas exhaust port; An air guide one-way valve (221) installed in the air guide cavity; An outer tube (222) coaxially arranged with the inner tube (220) and forming the guide cavity (222a) with the inner tube (220); One end of the inner tube (220) is formed with a plug structure capable of being inserted into the nut (11).

5. A lock washer and nut assembly according to claim 4 wherein: The plug structure comprises: A plug sleeve (50) integrally formed on the inner tube (220) and gradually reduced in cross-sectional diameter in the axial direction; An annular stop edge (51) provided on the top end surface of the plug sleeve (50); A limiting stop edge (52) integrally formed on one end of the outer tube (222) and arranged in a staggered manner with the annular stop edge (51); The annular stop edge (51) and the limiting stop edge (52) are respectively provided with a blanking port (53) capable of being staggered or communicated with each other, and a third reset spring (54) is connected between the limiting stop edge (52) and the outer tube (222); The outer wall of the outer tube (222) is integrally formed with an annular stress receiving portion (60), and when the positioning column (243) passes through the positioning port (243a) and abuts against the annular stress receiving portion (60), the outer tube (222) and the inner tube (220) can be relatively moved in the axial direction and the blanking ports (53) can be communicated with each other.

6. A lock washer and nut assembly according to claim 5 wherein: The inner wall of the protection cavity (21) is provided with an axially extending positioning groove (210), and the annular stress receiving portion (60) is provided with a positioning rib (610) capable of moving in the positioning groove (210); The inner wall of the protection cavity (21) is provided with a clamping port (21a), and the positioning ring block (240) is provided with a clamping portion (21b) matched with the clamping port (21a).

7. A tamper proof nut assembly according to claim 5 or 6 wherein: The inner tube is formed with a filter cap (70) at one end away from the sleeve (50), the filter cap (70) is formed with a filter cavity communicating with the bleed air cavity (220a), and the outer wall of the filter cap (70) is formed with filter holes communicating with the filter cavity.

8. A method of packaging a nut assembly suitable for use in the nut assembly of claim 6, wherein the method comprises: The method comprises the following steps: S1: preparing a protection body with an elastic support, and sequentially placing a bolt, a nut and a guide into the protection cavity; S2: taking at least one anti-theft steel ball and placing it into the guide cavity of the guide; S3: aligning the elastic end piece with the other end of the protection body, and installing the positioning ring block of the elastic end piece on the protection body through the clamping part; In step S3, the positioning ring block is positioned with the inner tube of the guide through the exhaust port, and after the installation of the elastic end piece is completed, the pressing block is pressed and the anti-theft steel ball in the guide enters the anti-theft groove of the nut, at the same time, the bolt extrudes the elastic support and the threaded shank is exposed from one end of the protection body to complete the packaging, and the threaded shank is checked.

9. The method of claim 8, wherein: In step S3, when the pressing block of the elastic end piece is pressed, the air inlet hole is covered by the pressing tool, the gas in the second folding cavity is first extruded from the bleed air cavity, and the nut is cleaned, then the pressing block contacts with the guide and the sleeve is clamped into the nut; In step S3, when the elastic support is extruded, the gas in the first folding cavity is sprayed out and the threaded shank gradually exposed from the central cavity is cleaned; In step S3, when the pressing block loses the pressing, the first folding body and the second folding body reset; when the first folding body resets, the air return one-way valve pumps air and guides the impurities on the surface of the bolt into the collection area; when the second folding body resets, the positioning column resets, the limiting edge rises and causes the each blanking port to be misaligned.

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