Lock bolt assembly

Abstract

The utility model relates to a lock bolt assembly, and relates to the technical field of bolts, the lock bolt assembly comprises: a bolt, a screw rod of which is provided with a guide anti-rotation groove along the longitudinal direction; the nut assembly comprises a nut body matched with the bolt and a magnetic backing ring fixed to one end of the nut body. And the magnetic limiting lantern ring is sleeved on the screw rod in a sliding manner and is provided with an anti-rotation key matched with the guide anti-rotation groove. The anti-rotation key of the magnetic limiting lantern ring is matched with the guide anti-rotation groove of the screw, relative rotation of the magnetic limiting lantern ring and the bolt is limited, the magnetic limiting lantern ring and the magnetic backing ring are connected in a magnetic attraction mode, so that fixed connection of the magnetic limiting lantern ring and the nut body is achieved, and then relative rotation of the nut body and the bolt is limited; the nut body is prevented from loosening; by means of the magnetic attraction connection mode, the magnetic limiting lantern ring can be prevented from being separated from the nut body in different bolt installation directions without external force, and damage-free disassembly of the nut can be achieved under certain external force.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to an anti-loosening bolt assembly. Background Art

[0002] At present, bolts, as cylindrical threaded fasteners matched with nuts, are often used to fasten and connect two parts with through holes. Various mechanical equipment, bridges, railways, tools and instruments require a variety of bolts.

[0003] The bolt consists of two parts: the head and the screw, and needs to be used in conjunction with the nut. During the operation of mechanical equipment, especially when running at high speeds, the nut may gradually loosen along the grain. If not maintained in time, it may easily cause production and construction accidents.

[0004] In the related technology, nut structures such as friction anti-loosening or riveting anti-loosening are mostly used. Among them, friction anti-loosening is to increase the pressure and friction between the thread pairs to prevent relative rotation, which is convenient for the disassembly of the nut; riveting anti-loosening is to use punching, welding, bonding and other methods after tightening the anti-loosening nut to make the thread pair lose the characteristics of the kinematic pair and become an inseparable connection.

[0005] However, in the case of impact, vibration and variable load, the bolts of the friction anti-loosening structure will loosen, resulting in a decrease in preload. As the number of vibrations increases, the preload loss slowly increases, eventually causing the nut to loosen and the threaded connection to fail. The anti-loosening nut of the riveting anti-loosening structure can only be used once, and it is very difficult to disassemble. The anti-loosening nut bolt pair must be destroyed before it can be disassembled, resulting in the inability to achieve a detachable connection between the bolt and the nut. Utility Model Content

[0006] In view of some defects existing in the prior art, the purpose of the present application is to provide an anti-loosening bolt assembly that can achieve the function of completely preventing loosening while satisfying the requirement of detachable bolt connection.

[0007] The anti-loosening bolt assembly of the present application comprises:

[0008] The bolt has a guide anti-rotation groove along the longitudinal direction of the screw rod;

[0009] A nut assembly, comprising a nut body adapted to the bolt, and a magnetic washer fixed to one end of the nut body;

[0010] The magnetic limit collar is slidably mounted on the screw and is provided with an anti-rotation key that cooperates with the guide anti-rotation groove; the magnetic limit collar is used to be mounted on the screw when the nut body is tightened, and is magnetically connected to the magnetic gasket.

[0011] In one embodiment, the end surface of the magnetic washer away from the nut body is provided with a first ratchet ring, and the end surface of the magnetic limiting collar facing the magnetic washer is provided with a second ratchet ring that can mesh with the first ratchet ring at any angle;

[0012] When the first ratchet ring is meshed with the second ratchet ring, the nut body is restricted from rotating in a direction of disengaging the bolt.

[0013] In one embodiment, the nut body and the magnetic washer are integrally formed or non-detachably fixedly connected.

[0014] In one embodiment, the magnetic limiting ring is made of permanent magnetic material.

[0015] In one embodiment, the magnetic limiting collar comprises:

[0016] The magnetic limit ring has a plurality of accommodating grooves formed on its end surface along the circumferential direction, and a magnet is disposed in each of the accommodating grooves; the magnetic limit ring also has a first through hole for the screw to pass through, and the anti-rotation key is disposed on the inner wall of the first through hole;

[0017] An anti-loosening gasket is fixedly connected to the magnetic limiting ring, is provided with one end of a magnet, and is provided with a second through hole, wherein the second through hole at least partially exposes each of the accommodating grooves.

[0018] In one embodiment, the magnetic limiting ring and the anti-loosening washer are detachably fixedly connected or non-detachably fixedly connected.

[0019] In one embodiment, the accommodating groove is a step through groove, and the large groove of the step through groove is arranged close to the anti-loosening gasket;

[0020] The magnet is located in the large groove of the step through groove and abuts against the step surface of the step through groove.

[0021] In one embodiment, the end surface of the magnetic limiting ring facing the anti-loosening washer is further provided with a boss engaged with the anti-loosening washer, and the boss is circumferentially provided with a plurality of avoidance notches connected to the accommodating grooves.

[0022] In one embodiment, the anti-loosening washer and the magnetic washer have corresponding grooves and gaps on their surfaces.

[0023] In one embodiment, the anti-loosening washer is made of magnetic material, the magnet is a permanent magnet, and the nut body is a magnetic nut.

[0024] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0025] The anti-loosening bolt assembly of the present application can be set on the above-mentioned screw when the nut body is tightened on the bolt. The relative rotation between the magnetic limiting collar and the bolt can be limited by the anti-rotation key of the magnetic limiting collar and the guide anti-rotation groove of the screw. The magnetic limiting collar and the magnetic gasket are connected by magnetic attraction to achieve a fixed connection between the magnetic limiting collar and the nut body, thereby limiting the relative rotation between the nut body and the bolt and preventing the nut body from loosening. In addition, through the magnetic attraction connection method, not only can the magnetic limiting collar be prevented from detaching from the nut body in different bolt installation orientations without external force, but also the nut can be disassembled without damage under a certain external force, which satisfies the detachable connection of the bolt and realizes the function of completely preventing loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the anti-loosening bolt assembly in the embodiment of the present application;

[0028] Figure 2 An exploded view of the anti-loosening bolt assembly in an embodiment of the present application;

[0029] Figure 3 This is a schematic diagram of the structure of the magnetic gasket and the anti-loosening gasket in the embodiment of the present application;

[0030] Figure 4 Schematic diagram of the structure of the magnetic limit ring in the embodiment of the present application.

[0031] In the figure:

[0032] 1. Bolt; 11. Screw; 12. Guide anti-rotation groove;

[0033] 2. Nut body;

[0034] 3. Magnetic washer; 31. First ratchet ring;

[0035] 4. Magnetic limit ring; 40. Anti-rotation key; 41. Magnetic limit ring; 411. Accommodating groove; 412. Magnet; 413. Boss; 42. Anti-loosening washer; 421. Second ratchet ring;

[0036] 5. Groove notch. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] The embodiment of the present application provides an anti-loosening bolt assembly, which can solve the technical problem in the related art that the detachable connection of the bolt and the anti-loosening function of the nut cannot be satisfied at the same time.

[0039] Figure 1 Schematic diagram of the structure of the anti-loosening bolt assembly of this embodiment. Figure 1 As shown, the anti-loosening bolt assembly of this embodiment includes a bolt 1, a nut assembly and a magnetic limiting ring 4.

[0040] The bolt 1 comprises a screw rod 11 , and a guide anti-rotation groove 12 is provided on the screw rod 11 along the longitudinal direction.

[0041] The nut assembly comprises a nut body 2 and a magnetic washer 3. The nut body 2 is provided with a threaded hole adapted to the bolt 1 and is sleeved on the bolt 1 to adapt to the bolt 1. The magnetic washer 3 is fixed to one end of the nut body 2 and is located at the end of the nut body 2 away from the head of the bolt 1.

[0042] The magnetic limiting collar 4 is slidably mounted on the screw 11 and is provided with an anti-rotation key 40 that matches the guide anti-rotation groove 12. The magnetic limiting collar 4 is used to be mounted on the screw 11 and magnetically connected to the magnetic backing ring 3 when the nut body 2 is tightened.

[0043] In the anti-loosening bolt assembly of the present embodiment, when the nut body is tightened on the bolt, the magnetic limit collar can be sleeved on the above-mentioned screw rod, and the relative rotation between the magnetic limit collar and the bolt can be limited by the cooperation between the anti-rotation key of the magnetic limit collar and the guide anti-rotation groove of the screw rod. The magnetic limit collar and the magnetic gasket are magnetically connected to achieve a fixed connection between the magnetic limit collar and the nut body, thereby limiting the relative rotation between the nut body and the bolt and preventing the nut body from loosening. In addition, through the magnetic connection method, not only can the magnetic limit collar be prevented from detaching from the nut body in different bolt installation orientations without external force, but also the nut can be disassembled without damage under a certain external force, which satisfies the detachable connection of the bolt and realizes the function of completely preventing loosening.

[0044] In this embodiment, the bolt 1 further comprises a bolt head, and the guide anti-rotation groove 12 is located at an end of the screw rod 11 away from the bolt head and extends from the end surface of the screw rod 11 away from the bolt head toward the bolt head. The length of the guide anti-rotation groove 12 can be set as required.

[0045] Preferably, the nut body 2 and the magnetic backing ring 3 are integrally formed.

[0046] Optionally, the nut body 2 and the magnetic backing ring 3 are non-detachably fixedly connected.

[0047] like Figure 2 and Figure 3 As shown, in some embodiments, the end face of the magnetic washer 3 away from the nut body 2 is provided with a first ratchet ring 31, and the end face of the magnetic limiting ring 4 facing the magnetic washer 3 is provided with a second ratchet ring 421, and the second ratchet ring 421 can be meshed with the first ratchet ring 31 at any angle, so as to lock the nut at any angle.

[0048] In this embodiment, when the first ratchet ring 31 is meshed with the second ratchet ring 421 , the nut body 2 can be further restricted from rotating in a direction of disengaging from the bolt 1 .

[0049] Preferably, the magnetic limiting ring 4 is made of permanent magnetic material.

[0050] In this embodiment, the magnetic limiting collar 4 and the anti-rotation key 40 and the second ratchet ring 421 thereon are integrally made of permanent magnetic material.

[0051] On the basis of the above-mentioned embodiment, in this embodiment, the magnetic limiting ring 4 includes a magnetic limiting ring 41 and an anti-loosening washer 42 .

[0052] like Figure 4 As shown, the end surface of the magnetic stop ring 41 is provided with a plurality of accommodating grooves 411 along the circumferential direction, and each accommodating groove 411 is provided with a magnet 412. The magnetic stop ring 41 is also provided with a first through hole for the screw 11 to pass through, and the anti-rotation key 40 is provided on the inner wall of the first through hole.

[0053] When the magnetic limiting ring 41 is sleeved on the screw 11 , the anti-rotation key 40 on the inner wall of the first through hole is located in the guide anti-rotation groove 12 of the screw 11 to limit the relative rotation between the magnetic limiting ring 41 and the screw 11 .

[0054] The anti-loosening washer 42 is connected to the magnetic limiting ring 41 and fixedly connected to one end of the magnetic limiting ring 41 provided with a magnet 412. The anti-loosening washer 42 is provided with a second through hole, and the second through hole at least partially exposes each of the accommodating grooves 411. Therefore, the second through hole also needs to be passed through by the screw 11, and the aperture of the second through hole is larger than the aperture of the first through hole.

[0055] In this embodiment, by fixing the magnetic limiting ring 41 and the anti-loosening washer 42 to form a magnetic limiting collar, the relative rotation between the nut assembly and the screw rod 11 can be effectively avoided, thereby realizing the anti-loosening function of the nut assembly.

[0056] In this embodiment, the end surface of the anti-loosening washer 42 away from the magnetic limiting ring 41 is provided with the second ratchet ring 421 for engaging with the first ratchet ring 31 of the magnetic washer 3 .

[0057] Optionally, the first through hole and the second through hole are coaxially arranged.

[0058] On the basis of the above-mentioned embodiment, in this embodiment, the anti-loosening washer 42 is detachably fixedly connected to the magnetic limiting ring 41 .

[0059] In this embodiment, the anti-loosening gasket 42 is detachably fixedly connected to the above-mentioned magnetic limiting ring 41. When the magnet 412 in the accommodating groove 411 needs to be replaced, the anti-loosening gasket 42 can be removed first, and then the anti-loosening gasket 42 can be fixedly connected to the magnetic limiting ring 41 after the replacement is completed.

[0060] On the basis of the above-mentioned embodiment, in this embodiment, when there is no need to replace the magnet 412 , the anti-loosening washer 42 is non-detachably fixedly connected to the magnetic limiting ring 41 .

[0061] Furthermore, the accommodating groove 411 is a step through groove, which includes a large groove and a small groove that are interconnected, and the large groove of the step through groove is arranged close to the anti-loosening gasket 42 .

[0062] The magnet 412 is located in the large groove of the step through groove and abuts against the step surface of the step through groove.

[0063] In this embodiment, the accommodating groove 411 is set as a stepped groove, so that when the magnet 412 needs to be replaced or removed, a rod with an outer diameter smaller than the inner diameter of the small groove of the stepped groove is extended from the small groove to push the magnet 412 out of the large groove of the stepped groove.

[0064] Optionally, the large groove and the small groove of the step through groove may be coaxially arranged or non-coaxially arranged.

[0065] In this embodiment, the magnet 412 is a cylindrical magnet, and its outer diameter is adapted to the large slot and is smaller than the small slot.

[0066] Preferably, the end surface of the magnetic limiting ring 41 facing the anti-loosening washer 42 is further provided with a boss 413, which is engaged with the anti-loosening washer 42. The boss 413 is provided with a plurality of avoidance gaps connected to the respective receiving grooves 411 along the circumferential direction. The plurality of avoidance gaps corresponds to the plurality of receiving grooves 411 one by one.

[0067] In this embodiment, the anti-loosening washer 42 is limited by the boss 413 to facilitate accurate positioning and connection between the anti-loosening washer 42 and the magnetic limiting ring 41 .

[0068] Optionally, the end surface of the magnetic limiting ring 41 facing the anti-loosening washer 42 is further provided with a plurality of plug-in grooves, and the end surface of the anti-loosening washer 42 is provided with a plurality of plug-in columns adapted to the plug-in grooves.

[0069] In this embodiment, the plurality of plug-in slots and the plurality of receiving slots 411 may be arranged at intervals.

[0070] In this embodiment, the anti-loosening washer 42 and the magnetic limiting ring 41 can also be accurately positioned and connected through the cooperation between the plug-in slot and the plug-in column.

[0071] On the basis of the above-mentioned embodiment, in this embodiment, a groove notch 5 is formed on the surface of the anti-loosening washer 42 corresponding to the surface of the magnetic washer 3 .

[0072] In this embodiment, since the second ratchet ring 421 of the anti-loosening washer 42 is meshed with the first ratchet ring 31 of the magnetic washer 3, and the two are not easy to separate under the magnetic attraction force. By providing groove notches 5 corresponding to the opposite surfaces of the anti-loosening washer 42 and the magnetic washer 3, when the nut body 2 needs to be adjusted or disassembled, the magnetic anti-loosening washer 42 and the magnetic washer 3 are separated by external force at the groove notch 5, so as to realize the rapid disassembly of the bolt and nut.

[0073] In this embodiment, the first ratchet ring 31 of the magnetic washer 3 protrudes from the end face of the nut body 2, and the second ratchet ring 421 of the anti-loosening washer 42 protrudes from the end face of the boss 413 of the magnetic limiting ring 41 to avoid interference with the meshing of the first ratchet ring 31 and the second ratchet ring 421.

[0074] Preferably, the anti-loosening washer 42 is made of magnetic material, and the magnet 412 is a permanent magnet. The anti-loosening washer 42 and the magnetic limiting ring 41 are further tightly connected by the magnetic attraction force of the anti-loosening washer 42 and the magnetic limiting ring 41.

[0075] Optionally, the nut body 2 is a magnetic nut to achieve a further tight connection between the nut body 2 and the magnetic limiting ring.

[0076] When the anti-loosening bolt assembly of this embodiment is used, it specifically includes:

[0077] First, insert the bolt 1 into the desired connection part;

[0078] Then, according to normal operation, the nut assembly is inserted into the bolt 1 to the position where locking is required, and the magnetic washer 3 is located on the side of the nut body 2 away from the bolt head;

[0079] Finally, the magnetic limit collar 4 is sleeved on the screw 11 so that the anti-rotation key 40 is located in the guide anti-rotation groove 12, forming a non-rotatable plug-in fit between the magnetic limit collar 4 and the screw 11, and moving until the second ratchet ring 421 engages with the first ratchet ring 31, and the magnetic limit collar 4 is attracted to the nut assembly.

[0080] The anti-loosening bolt of this embodiment can prevent the bolt 1 from loosening due to external factors such as vibration, and can prevent the magnetic limit collar from being separated from the nut body even if the nut assembly is located below the required connecting component. Without changing the detachable effect of the bolt 1, it has important significance for production safety and production efficiency in various industries.

[0081] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0082] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0083] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An anti-loosening bolt assembly, characterized in that: The anti-loosening bolt assembly comprises: The bolt (1) has a screw rod (11) with a guide anti-rotation groove (12) provided in the longitudinal direction; A nut assembly, comprising a nut body (2) adapted to a bolt (1), and a magnetic washer (3) fixed to one end of the nut body (2); A magnetic limit collar (4) is slidably sleeved on the screw rod (11) and is provided with an anti-rotation key (40) that cooperates with the guide anti-rotation groove (12); the magnetic limit collar (4) is used to sleeve on the screw rod (11) and be magnetically connected to the magnetic washer (3) when the nut body (2) is tightened.

2. The anti-loosening bolt assembly according to claim 1, characterized in that: The end surface of the magnetic washer (3) away from the nut body (2) is provided with a first ratchet ring (31), and the end surface of the magnetic limiting collar (4) facing the magnetic washer (3) is provided with a second ratchet ring (421) that can mesh with the first ratchet ring (31) at any angle; When the first ratchet ring (31) is meshed with the second ratchet ring (421), the nut body (2) is restricted from rotating in a direction of disengaging from the bolt (1).

3. The anti-loosening bolt assembly according to claim 1, characterized in that: The nut body (2) and the magnetic washer (3) are integrally formed or non-detachably fixedly connected.

4. The anti-loosening bolt assembly according to claim 1, characterized in that: The magnetic limiting collar (4) is made of permanent magnetic material.

5. The anti-loosening bolt assembly according to claim 1, characterized in that: The magnetic limiting collar (4) comprises: A magnetic limiting ring (41) has a plurality of accommodating grooves (411) formed on its end surface along the circumferential direction, each of the accommodating grooves (411) being provided with a magnet (412); the magnetic limiting ring (41) is also provided with a first through hole for the screw rod (11) to pass through, and the anti-rotation key (40) is provided on the inner wall of the first through hole; An anti-loosening gasket (42) is fixedly connected to the magnetic limiting ring (41) and is provided with one end of a magnet (412) and a second through hole, wherein the second through hole at least partially exposes each of the accommodating grooves (411).

6. The anti-loosening bolt assembly according to claim 5, characterized in that: The magnetic limiting ring (41) and the anti-loosening washer ring (42) are detachably fixedly connected or non-detachably fixedly connected.

7. The anti-loosening bolt assembly according to claim 5, characterized in that: The receiving groove (411) is a step through groove, and the large groove of the step through groove is arranged close to the anti-loosening gasket (42); The magnet (412) is located in the large groove of the step through groove and abuts against the step surface of the step through groove.

8. The anti-loosening bolt assembly according to claim 5, characterized in that: The end surface of the magnetic limiting ring (41) facing the anti-loosening gasket (42) is also provided with a boss (413) engaged with the anti-loosening gasket (42), and the boss (413) is provided with a plurality of avoidance notches in the circumferential direction that are connected to the respective accommodating grooves (411).

9. The anti-loosening bolt assembly according to claim 5, characterized in that: The anti-loosening washer (42) and the magnetic washer (3) have corresponding groove notches (5) on their opposite surfaces.

10. The anti-loosening bolt assembly according to claim 5, characterized in that: The anti-loosening washer (42) is made of magnetic material, the magnet (412) is a permanent magnet, and the nut body (2) is a magnetic nut.

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