Lock bolt convenient to disassemble

Abstract

The utility model discloses a lock bolt convenient to disassemble, which comprises a bolt body, the bolt body comprises a thread section, a screw section and a bolt head, the thread section, the screw section and the bolt head are integrally formed, the bolt head is fixed at the tail end of the screw section, a fastening nut is screwed in the thread section, and a lock structure contacted with the nut is arranged in the thread section. According to the anti-loose bolt, the anti-loose mode integrating the anti-loose function, the rainproof function, the dustproof function, the anti-rust function and the lubricating function is adopted, and the two contradictory problems that when an existing bolt is connected with a workpiece, the self-locking capacity is low, looseness often occurs or the bolt is difficult to detach although the bolt is not prone to looseness are effectively solved; on the premise that the mechanical property and the structure of an existing bolt product are not damaged, the use requirement can be met, the national standard is met, and the bolt is also an innovation point, is simple in overall structure, convenient to operate, high in reliability, good in safety, high in practical value and beneficial to achieving application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt connection, and particularly relates to a detachable anti-loosening bolt. Background Art

[0002] A bolt is a widely used detachable fixed connection structure, which has the advantages of simple structure, reliable connection, convenient installation and disassembly, etc., so it is widely used in various industries. Commonly used bolts need to be matched with nuts to be used for fastening and connecting two parts with through holes. For example, if the nut is screwed off from the bolt, the two parts can be separated. Therefore, bolt connection belongs to detachable connection. During the long-term use of bolts, due to the influence of various factors such as friction, vibration and temperature, the nut often loosens, and the bolt falls off due to the loosening of the nut, which will not only affect the operation of the equipment, but even cause safety accidents, posing major safety hazards. Therefore, in order to avoid the loosening of the nut, sometimes it is necessary to use methods such as glue bonding or welding to fix it, but it is difficult to disassemble the bolt in this way, which makes the maintenance and disassembly difficult.

[0003] Especially in the field of tower cranes, tower cranes are essential special equipment on construction sites, which are different from other mechanical equipment. Once the fastening bolts and nuts of the standard sections become loose, it will cause the fastening bolts and nuts to fall, resulting in the overturning of the tower crane, thus triggering major accidents with heavy casualties. Therefore, for tower cranes, the anti-loosening of bolt connection is particularly important.

[0004] In order to avoid the loosening of bolts applied in the field of tower cranes during long-term use due to vibration, the applicant applied for a patent named a thread anti-loosening device on December 25, 2019. The authorization announcement number of this patent is CN211117063U. During daily application, in order to facilitate use and achieve the anti-loosening purpose, the applicant applied for another patent named a thread anti-loosening device on August 27, 2020. The authorization announcement number of this patent is CN212838901U. The above two patent documents provide an anti-loosening structure that meets the use requirements of bolts from different angles. In the field of tower cranes, a large number of bolts are needed, involving different bolt structures. In order to reduce costs, facilitate disassembly, and meet the use requirements of different bolts, an anti-loosening bolt different from the prior art is provided, aiming to solve the two mutually contradictory problems that the self-locking ability of the existing bolts when connecting with workpieces is low, often loosens, or is difficult to disassemble although not easy to loosen. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to provide an anti-loosening bolt with a simple structure, convenient installation and operation in view of the problems existing in the background technology. By using this anti-loosening bolt, not only can the two mutually contradictory problems that the self-locking ability is relatively low when the existing bolt is connected to the workpiece, often loosening occurs, or although it is not easy to loosen but it is difficult to disassemble be effectively solved, but also the manufacturing cost can be reduced, the usage requirements of different bolts can be met, and the potential safety hazards of tower cranes can be effectively eliminated. Specifically, it is an anti-loosening bolt that is easy to disassemble.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is: an anti-loosening bolt that is easy to disassemble, including a bolt body. The bolt body includes an integrally formed threaded section, a screw rod section, and a bolt head fixed at the end of the screw rod section. A fastening nut is screwed in the threaded section, and an anti-loosening structure in contact with the fastening nut is provided in the threaded section.

[0007] Further, for an anti-loosening bolt that is easy to disassemble according to the present utility model, the fastening nut includes an outer nut and an inner nut. The outer nut and the inner nut are respectively screwed on the threaded section of the bolt body, and the anti-loosening structure abuts against the outer end face of the outer nut.

[0008] Further, for an anti-loosening bolt that is easy to disassemble according to the present utility model, the anti-loosening structure includes an anti-loosening rod and a locking screw. A blind hole matching the anti-loosening rod is provided in the threaded section. The blind hole is arranged in the threaded section near one end of the bolt body. A threaded through hole corresponding to the locking screw is provided at the end of the anti-loosening rod. The anti-loosening structure is detachably connected to the bolt body by inserting or screwing the anti-loosening rod into the blind hole; the locking screw is screwed with the anti-loosening rod through the threaded through hole and abuts against the outer end face of the outer nut through the threaded through hole, so as to realize the contact connection between the anti-loosening structure and the outer nut.

[0009] Further, for an anti-loosening bolt that is easy to disassemble according to the present utility model, the blind hole is arranged at the bottom of the thread teeth in the threaded section, and a limiting convex portion corresponding to the thread tooth groove in the threaded section is further provided on the outer side surface of the anti-loosening rod. When the anti-loosening rod is inserted into the blind hole, the limiting convex portion in the anti-loosening rod abuts against the thread tooth groove in the threaded section.

[0010] Further, for an anti-loosening bolt that is easy to disassemble according to the present utility model, a limiting structure is further provided on the outer end face of the outer nut. The front end of the locking screw screwed in the threaded through hole can abut against the limiting structure.

[0011] Furthermore, an anti-loosening bolt that is easy to disassemble is used as described in the utility model, and the limiting structure is an oblique tooth groove that matches the locking screw, and the oblique tooth groove is arranged in a ring shape on the outer end face of the outer nut, and the locking screw is threaded in the threaded through hole, and its front end is in contact with the bottom of the teeth of the oblique tooth groove, thereby realizing the contact connection between the anti-loosening structure and the outer nut.

[0012] Furthermore, the utility model is provided with an anti-loosening bolt that is easy to disassemble, and the anti-loosening bolt also includes a protective cover, and the protective cover is detachably covered on the nut.

[0013] Furthermore, the utility model is provided with an anti-loosening bolt that is easy to disassemble, characterized in that: the protective cover has a accommodating cavity, and an annular magnet matching the outer structure of the nut is embedded on the inner wall surface of the accommodating cavity, and the protective cover is connected to the nut via the annular magnet.

[0014] Furthermore, the utility model is provided with an anti-loosening bolt that is easy to disassemble, and the accommodating cavity in the protective cover is filled with semi-fluid grease.

[0015] Compared with the existing technology, the utility model has the beneficial effect of using an anti-loosening bolt that is easy to disassemble. The anti-loosening structure is configured, and the anti-loosening rod is inserted or screwed into the blind hole in a detachable manner, and the locking screw screwed on the anti-loosening rod is in abutment with the nut screwed in the threaded section. The locking screw is used to support the fastening nut to prevent the fastening nut from rotating in the opposite direction, thereby achieving the purpose of anti-loosening. At the same time, since a limiting protrusion is provided on the side of the anti-loosening rod, the limiting protrusion is used to abut and contact with the threaded tooth groove in the threaded section, thus preventing the anti-loosening rod inserted into the blind hole from rotating, thereby limiting the locking screw from rotating with the fastening nut, which can further improve its anti-loosening effect and achieve the purpose of anti-loosening; in addition, since a limiting structure is also provided on the outer end face of the fastening nut, the limiting structure adopts an oblique tooth groove matching the locking screw, the locking screw is used to abut and contact with the oblique tooth groove on the fastening nut, and the locking screw is used to support the fastening nut to prevent the fastening nut from rotating in the opposite direction, which can further enhance its anti-loosening effect and achieve the purpose of anti-loosening; finally, since a protective cover is also provided, and the accommodating cavity in the protective cover is also filled with semi-fluid grease, the filled semi-fluid grease can be used to lubricate the bolt body, the fastening nut, the anti-loosening rod and the locking screw, and the protective cover can play a protective role against dust and rust.

[0016] It can be seen that the anti-loosening bolt described in the utility model is adopted in a detachable manner. By configuring the anti-loosening rod, locking screw and protective cover in the existing bolt, the locking screw is used to support the fastening nut to prevent the fastening nut from rotating in the opposite direction, thereby achieving the purpose of automatic anti-loosening.

[0017] In summary, by adopting the anti-loosening bolt of the present utility model, an anti-loosening method integrating anti-loosening, rain protection, dust protection, and rust prevention and lubrication functions is adopted, effectively solving the two mutually contradictory problems that the self-locking ability is relatively low when the existing bolt is connected to the workpiece, and loosening often occurs, or although it is not easy to loosen, it is difficult to disassemble. Through the anti-loosening structure provided, without damaging the mechanical properties and structure of the existing bolt product, it can meet the use requirements and comply with national standards. This is the highlight and innovation point of the present utility model. Its overall structure is simple, convenient to operate, highly reliable, safe, and has high practical value, which is conducive to promoting and applying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described in detail below with reference to the drawings.

[0019] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;

[0020] Figure 2 is a partial structural diagram of Embodiment 1 of the present utility model;

[0021] Figure 3 is a schematic structural diagram of Embodiment 2 of the present utility model;

[0022] Figure 4 is a schematic structural diagram of Embodiment 3 of the present utility model;

[0023] Figure 5 is Figure 4 a schematic structural diagram of the protective cover.

[0024] As shown in the drawings: 1 - bolt body, 11 - threaded section, 12 - screw rod section, 13 - bolt head, 2 - fastening nut, 21 - outer nut, 22 - inner nut, 3 - anti-loosening rod, 31 - blind hole, 32 - screw connection through hole, 33 - limiting protrusion, 4 - locking screw, 41 - helical tooth-shaped groove, 5 - protective cover, 51 - accommodating cavity, 52 - annular magnet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To further illustrate the concept of the present utility model, the following will further describe the specific embodiments of the present utility model with reference to the drawings: Embodiment 1

[0026] As Figure 1 and Figure 2As shown, the present embodiment provides an anti-loosening bolt which is easy to disassemble, comprising a bolt body 1, wherein the bolt body 1 comprises an integrally formed threaded section 11, a screw section 12 and a bolt head 13 fixed to the end of the screw section 12, wherein a fastening nut 2 is threadedly connected in the threaded section 11, and an anti-loosening structure in contact with the fastening nut 2 is provided in the threaded section 11; wherein the fastening nut 2 comprises an outer nut 21 and an inner nut 22, wherein the outer nut 21 and the inner nut 22 are respectively threadedly connected to the threaded section 11 in the bolt body 1, and the anti-loosening structure is in contact with the outer end surface of the outer nut 21; and the anti-loosening structure comprises an anti-loosening Rod 3 and locking screw 4, a blind hole 31 matching the anti-loosening rod 3 is provided in the threaded section 11, the blind hole 31 is arranged in the threaded section 11 on one side close to the end of the bolt body 1, a threaded through hole 32 corresponding to the locking screw 4 is provided at the end of the anti-loosening rod 3, the anti-loosening structure is inserted into or screwed into the blind hole 31 through the anti-loosening rod 3, so as to realize the detachable connection between the anti-loosening structure and the bolt body 1; the locking screw 4 is screwed with the anti-loosening rod 3 through the threaded through hole 32, and passes through the threaded through hole 32 to abut against the outer end face of the outer nut 21, so as to realize the contact connection between the anti-loosening structure and the outer nut 21.

[0027] Furthermore, the anti-loosening bolt provided in this embodiment is used to improve its anti-loosening purpose and prevent the anti-loosening rod 3 inserted into the blind hole 31 from rotating. The blind hole 31 is arranged at the bottom of the thread teeth in the threaded segment 11, and a limiting protrusion 33 corresponding to the thread tooth groove in the threaded segment 11 is also provided on the outer side surface of the anti-loosening rod 3. When the anti-loosening rod 3 is inserted into the blind hole 31, the limiting protrusion 33 in the anti-loosening rod 3 is in abutment with the thread tooth groove in the threaded segment 11.

[0028] With the anti-loosening bolt provided in this embodiment, in a specific application process, the blind hole 31 can be set as a threaded hole, and the anti-loosening rod 3 is set as a threaded rod structure, the anti-loosening rod 3 is inserted into or screwed into the blind hole 31, and the locking screw 4 screwed into the anti-loosening rod 3 is in contact with the nut 2 screwed into the threaded section 11, and the locking screw 4 is used to support the fastening nut 2 to prevent the fastening nut 2 from rotating in the opposite direction, thereby achieving the purpose of anti-loosening. At the same time, since a limiting protrusion 33 is provided on the side of the anti-loosening rod 3, the limiting protrusion 33 is used to contact with the thread groove in the threaded section 11, so that the anti-loosening rod 3 inserted into the blind hole 31 can be prevented from rotating, thereby limiting the locking screw 4 from rotating with the fastening nut 2, which can further improve its anti-loosening effect and achieve the purpose of anti-loosening. Example 2

[0029] like Figure 3As shown, this embodiment is based on the embodiment 1, in order to improve its anti-loosening effect and achieve the anti-loosening purpose, to avoid the fastening nut 2 in contact with the locking screw 4 from rotating in the opposite direction due to vibration, so that the contact surface between the locking screw 4 and the fastening nut 2 is too large due to the gap, and the fastening nut 2 rotates in the opposite direction, and a limiting structure is also provided on the outer end face of the outer nut 21, and the locking screw 4 screwed in the screw-in through hole 32, and its front end can abut against the limiting structure; the limiting structure is an oblique tooth groove 41 matching the locking screw, and the oblique tooth groove 41 is annularly arranged on the outer end face of the outer nut 21, and the locking screw 4 screwed in the screw-in through hole 32, and its front end abuts against the bottom of the teeth of the oblique tooth groove 41, so that the anti-loosening structure is in contact with the outer nut 21.

[0030] When using the anti-loosening bolt provided in this embodiment, in a specific application process, since a limiting structure is also provided on the outer end surface of the fastening nut 2, the limiting structure adopts an oblique tooth groove 41 that matches the locking screw, and the locking screw 4 is used to abut against the oblique tooth groove 41 on the fastening nut 2, and the locking screw 4 is used to support the fastening nut 2, thereby effectively preventing the fastening nut 2 from rotating in the opposite direction, which can further enhance its anti-loosening effect and achieve the purpose of anti-loosening. Example 3

[0031] like Figure 4 and Figure 5 As shown, this embodiment is based on the embodiment 2, one is to improve the service life of the anti-loosening bolt, the second is to prevent the locking screw 4 from bouncing outward during use, and the third is to achieve the purpose of waterproofing, dustproofing and lubrication. The anti-loosening bolt also includes a protective cover 5, which is detachably covered on the nut 2. The protective cover 5 has a accommodating cavity 51, and an annular magnet 52 matching the outer structure of the nut 2 is also embedded on the inner wall surface of the accommodating cavity 51. The protective cover 5 is connected to the nut 2 through the annular magnet 52; and the accommodating cavity 51 in the protective cover 5 is filled with semi-fluid grease.

[0032] When using the anti-loosening bolt provided in this embodiment, in a specific application process, since an annular magnet 52 matching the outer structure of the nut 2 is embedded on the inner wall surface of the accommodating cavity 51, the annular magnet 52 is adsorbed on the outer side surface of the nut 2 to form a sealing structure. In this way, the semi-fluid grease filled in the accommodating cavity 51 can be used to lubricate the bolt body 1, the fastening nut 2, the anti-loosening rod 3 and the locking screw 4, and the protective cover 5 can be used to provide dust and rust protection, which can not only improve the service life of the anti-loosening bolt, but also prevent the locking screw 4 from rebounding during use, thereby reducing safety risks.

[0033] It can be seen that by adopting the lock - loosening prevention bolt of the present utility model, in a detachable manner, through the lock - loosening rod 3, the locking screw 4 and the protective cover 5 configured in the existing bolt, the locking screw 4 is used to hold against the fastening nut 2 to prevent the fastening nut 2 from rotating in the reverse direction, thereby achieving the purpose of automatic lock - loosening prevention.

[0034] In summary, by adopting the lock - loosening prevention bolt of the present utility model, a lock - loosening prevention method integrating lock - loosening prevention, rain protection, dust prevention and rust - proof lubrication functions is adopted, effectively solving the two mutually contradictory problems that the self - locking ability is relatively low when the existing bolt is connected to the workpiece, often loosening, or although not easy to loosen but difficult to disassemble. Through the set lock - loosening prevention structure, without damaging the mechanical properties and structure of the existing bolt product, it can meet the use requirements and conform to the national standards. This is the highlight and innovation point of the present utility model. Its overall structure is simple, convenient to operate, highly reliable, good in safety, high in practical value, and conducive to popularization and application.

[0035] Other details not elaborated in the present utility model are all well - known conventional technologies in the art.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anti-loosening bolt that is easy to disassemble, comprising a bolt body (1), characterized in that The bolt body (1) comprises an integrally formed threaded section (11), a screw section (12) and a bolt head (13) fixed to the end of the screw section (12); a fastening nut (2) is threadedly connected to the threaded section (11); and an anti-loosening structure in contact with the nut (2) is provided in the threaded section (11).

2. The anti-loosening bolt that is easy to disassemble according to claim 1, characterized in that: The fastening nut (2) comprises an outer nut (21) and an inner nut (22), wherein the outer nut (21) and the inner nut (22) are respectively threadedly connected to the threaded section (11) in the bolt body (1), and the anti-loosening structure is in abutment contact with the outer end surface of the outer nut (21).

3. The anti-loosening bolt that is easy to disassemble according to claim 2, characterized in that: The anti-loosening structure comprises an anti-loosening rod (3) and a locking screw (4); a blind hole (31) matching the anti-loosening rod (3) is provided in the threaded section (11); the blind hole (31) is arranged in the threaded section (11) on one side close to the end of the bolt body (1); a screw-connected through hole (32) corresponding to the locking screw (4) is provided at the end of the anti-loosening rod (3); the anti-loosening structure is inserted into or screwed into the blind hole (31) through the anti-loosening rod (3), so that the anti-loosening structure and the bolt body (1) are detachably connected; the locking screw (4) is screwed to the anti-loosening rod (3) through the screw-connected through hole (32), and passes through the screw-connected through hole (32) to abut against the outer end surface of the outer nut (21), so that the anti-loosening structure and the outer nut (21) are in contact with each other.

4. The anti-loosening bolt that is easy to disassemble according to claim 3 is characterized in that: The blind hole (31) is arranged at the bottom of the thread teeth in the threaded section (11), and a limiting protrusion (33) corresponding to the thread tooth groove in the threaded section (11) is also arranged on the outer side surface of the anti-loosening rod (3). When the anti-loosening rod (3) is inserted into the blind hole (31), the limiting protrusion (33) in the anti-loosening rod (3) is in contact with the thread tooth groove in the threaded section (11).

5. The anti-loosening bolt that is easy to disassemble according to claim 4, characterized in that: A limiting structure is also provided on the outer end surface of the outer nut (21), and a locking screw (4) threaded in the threaded through hole (32) can have its front end abutted against the limiting structure.

6. The anti-loosening bolt that is easy to disassemble according to claim 5, characterized in that: The limiting structure is an oblique toothed groove (41) matching with the locking screw. The oblique toothed groove (41) is arranged in an annular shape on the outer end surface of the outer nut (21). The locking screw (4) is threadedly connected to the threaded through hole (32), and its front end is in contact with the bottom of the teeth of the oblique toothed groove (41), thereby realizing the contact connection between the anti-loosening structure and the outer nut (21).

7. The anti-loosening bolt that is easy to disassemble according to claim 1, characterized in that: The anti-loosening bolt also includes a protective cover (5), which is detachably covered on the nut (2).

8. The anti-loosening bolt that is easy to disassemble according to claim 7, characterized in that: The protective cover (5) comprises a containing cavity (51), and an annular magnet (52) matching the outer structure of the nut (2) is embedded on the inner wall surface of the containing cavity (51), and the protective cover (5) is connected to the nut (2) via the annular magnet (52).

9. The anti-loosening bolt that is easy to disassemble according to claim 8, characterized in that: The accommodating cavity (51) in the protective cover (5) is filled with semi-fluid grease.

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