Fastening and disassembling method of anti-loosening device

Abstract

The locking device is composed of a nut clamping seat, a hollow screw rod, a pawl, a locking washer, a ratchet wheel, a ratchet wheel seat, a key, a marble, a bolt and a nut. And the nut clamping seat, the hollow screw rod and the lock washer are combined with the bolt and the nut to form a set of locking device for fastening. And when the nut rotates reversely to loosen in case of vibration, the nut is controlled by the hollow screw at one end of the nut clamping seat. One end of the hollow screw is connected with the pawl, and the pawl is supported in the pawl positioning groove in one end of the lock washer, so that the hollow screw is controlled to only rotate in one direction. And the ratchet wheel, the ratchet wheel seat, the key and the marble form a set of disassembly of the anti-loosening device. And when the marble is squeezed into the marble positioning groove on the ratchet wheel by the key, the ratchet wheel and the ratchet wheel seat are connected to rotate. When the pawl at one end of the hollow screw rod is extruded by the cam on the ratchet wheel, the pawl gets close to the screw rod and leaves the pawl positioning groove at one end of the lock washer, and the control that the hollow screw rod can only rotate in one direction is relieved.

Description

Technical Field

[0001] This utility model relates to the field of fasteners and is a set of anti-loosening devices for fastening and disassembly. Background Technology

[0002] Bolts, nuts, and washers are common fasteners. They come in various shapes and have a single function: to connect two or more objects that are inconvenient to manufacture as a single unit.

[0003] Bolts, nuts, and washers are safe and reliable for securing stationary objects. However, they cannot guarantee long-term safety and reliability when securing objects subject to vibration. This is because fasteners exposed to high-frequency vibration will loosen over time. Examples include machine tools, bridges, and guide rails. Once any signs of loosening are observed, they must be tightened or replaced promptly; otherwise, they can pose unimaginable safety hazards to operating machine tools and equipment.

[0004] To eliminate safety hazards, various anti-loosening products have emerged in the fastener industry. Common ordinary washers, when fitted onto bolts or nuts, increase the contact area between the bolt and nut and the object being tightened, thus increasing frictional resistance. However, they are almost ineffective in areas experiencing vibration. Improved spring washers utilize their own elasticity to achieve an ideal anti-loosening state when the bolt or nut clamps the object, but this is not always the case in actual use; strong mechanical vibrations still render them unsatisfactory. Later, a Swedish invention of a butterfly-shaped double-layer anti-loosening washer and a Japanese invention of a concave-convex double nut offered some improvement in fastener anti-loosening. However, the former, the butterfly-shaped double-layer anti-loosening washer, places very high demands on the bolt and nut during use. This is because the angle generated by the rotation of the two washers must be greater than the angle generated by the rotation of the bolt thread and the nut, to control the resistance generated when the nut rotates against the bolt. While the idea is good, in reality, when such a loosening washer encounters significant torque, the anti-loosening teeth on the butterfly-shaped double-layer washer do not move in a straight line and embed into the tightened object (nut). Instead, it rotates in the same direction as the nut, creating a groove on the contact surface between the fastened object and the nut, achieving an anti-loosening effect similar to a spring washer. A more fatal flaw is that a significantly increased torque is required to engage the anti-loosening teeth on the washer. This enormous torque forces the bolt thread to its limit of tension. When the fastened object needs to be removed or replaced, an even greater reverse rotation torque is required. For a bolt already at its limit of tension, encountering even greater torque can easily damage the threads or even cause the bolt to break. Similar anti-loosening technologies include CN202310104191.5, etc. The latter's convex-concave anti-loosening nut is an improvement over the former's anti-loosening washer. Its principle is to use two convex and concave nuts on a bolt, where the friction between the different cores of the two nuts creates a wedge force to prevent loosening. However, the concave nut rotates on the convex nut, and wear occurs every time the convex and concave meet, compromising the anti-loosening effect for repeated use. More importantly, when a concave nut is squeezed by a convex nut, the threads on the concave nut and the threads on the bolt will also suffer damaging wear, eventually causing the bolt, which could have been reused, to need to be replaced at the same time.

[0005] Besides the fasteners mentioned above, there are also designs such as "grooves in the screw," "holes in the nut," "self-locking," and "never loosening." As is well known, after tightening, the bolt is stretched to its limit by the nut. At this point, grooving the screw, drilling a hole in the nut, or increasing the disassembly torque are necessary to separate the nut from the bolt. Such designs only accelerate the breakage of the screw and the damage to the nut.

[0006] The original purpose of fasteners is to connect two or more objects that are inconvenient to manufacture as a single unit using bolts, nuts, and washers, so as to facilitate future maintenance and replacement.

[0007] To overcome the shortcomings of existing products and achieve the original purpose of fasteners, this utility model designs a set of anti-loosening devices for fastening and disassembly. Its structure is simple, inexpensive, reusable, and easy to assemble and disassemble. Summary of the Invention

[0008] A set of anti-loosening devices for tightening and loosening consists of a nut holder, hollow screw, pawl, anti-loosening washer, ratchet, ratchet seat, key, ball bearing, bolt and nut.

[0009] A nut holder, hollow screw, and anti-loosening washer, combined with a bolt and nut, form a locking device for fastening. The pitch of the internal thread at one end of the nut holder and the pitch of the external thread at one end of the hollow screw are set to be greater than the pitch of the threads on the nut and the screw. The purpose is to prevent the nut from rotating backwards on the screw when the nut and nut holder rotate in the opposite direction, and the hollow screw is prevented from rotating backwards by the anti-loosening washer. The principle is: a smaller pitch results in a smaller displacement distance, and a larger pitch results in a larger displacement distance. When the nut and nut holder rotate in the opposite direction, and the hollow screw is prevented from rotating backwards by the anti-loosening washer, the displacement distance generated by the nut holder rotating backwards on the hollow screw is greater than the displacement distance generated by the nut rotating backwards on the screw. At this point, the hollow screw cannot rotate backwards, which is equivalent to the nut rotating backwards on the screw, thus exerting a reverse thrust on the hollow screw through the nut holder. When a hollow screw is subjected to a reverse thrust, it is equivalent to the anti-loosening washer applying greater pressure to the object being fastened, thus achieving the fastening of an anti-loosening device.

[0010] The ratchet, ratchet seat, key, and ball pin constitute a set of anti-loosening devices for disassembly. The ratchet is placed at one end of the ratchet seat, in a ratchet mounting slot. The ball pin is placed at one end of the ratchet seat, in a ball pin movement slot. When the ratchet seat rotates, the ball pin rotates with it, but the ratchet itself does not. When a key is inserted into the keyhole on the ratchet seat, turning the key forces the ball pin to move via a sliding groove on the key. When the ball pin is pressed into the ball pin positioning slot on the ratchet by the groove on the key, the ratchet seat rotates, causing the ratchet to rotate as a unit. As the ratchet rotates, the cam on the ratchet encounters the pawl at one end of the hollow screw, forcing the pawl to disengage from the ratchet. The pawl disengaging from the ratchet simultaneously disengages from the pawl positioning slot at the anti-loosening washer end, causing the hollow screw to lose unidirectional rotation control, thus disassembling the anti-loosening device.

[0011] In summary,

[0012] The tightening and loosening of a set of anti-loosening devices is used in vibrating environments. If the nut loosens in the opposite direction, the nut holder will drive the hollow screw to move linearly in the opposite direction, increasing the pressure of the hollow screw on the anti-loosening washer.

[0013] The pawl at one end of the hollow screw and the pawl positioning groove at the other end of the anti-loosening washer are used to control the hollow screw to rotate in one direction.

[0014] When the pawl at one end of the hollow screw is supported in the pawl positioning groove at one end of the anti-loosening washer, the pawl controls the hollow screw to rotate unidirectionally at the anti-loosening washer end.

[0015] The locking cone on the boss at one end of the lock washer is used to engage with the object being fastened, preventing the lock washer from sliding on the surface of the object. For objects that cannot be engaged, a corresponding groove is provided on the object to which the boss at one end of the lock washer is provided. This interlocking of the boss and groove further prevents the lock washer from sliding on the surface of the object being fastened.

[0016] To prevent the anti-loosening washer from sliding on the fastened object, one end of the bolt shank can be designed as a prism, and the through holes of the fastened object and the anti-loosening washer shank can be designed as diamond-shaped through holes.

[0017] The combined use of the key, pin, ratchet, and ratchet seat can push the pawl supported at one end of the anti-loosening washer out of the pawl positioning groove, releasing the control of the hollow screw to rotate unidirectionally at one end of the anti-loosening washer.

[0018] A set of anti-loosening devices for fastening and disassembling includes: a nut holder, a hollow screw, a pawl, a ratchet, a ratchet seat, a key, a ball, an anti-loosening washer, a bolt, and a nut. The nut holder has a nut groove at one end and an internal thread at the other. The hollow screw has an external thread at one end and a pawl connected to the other end. The pawl is elastic. The ratchet has a cam and a ball positioning groove on its outer side. The ratchet seat has a ratchet placement groove, a ball movement groove, and a keyhole. The key has a ball track that varies in depth. The anti-loosening washer has a pawl positioning groove at one end and an uneven boss at the other end with an anti-loosening cone. The nut is installed in the nut groove at one end of the nut holder. One end of the bolt is designed with a prism.

[0019] Preferably, a nut is installed in a nut slot at one end of the nut holder, and the internal thread at the other end rotates onto the external thread at one end of the hollow screw. The function is that as the nut rotates on the screw, the nut holder rotates synchronously.

[0020] Preferably, when the nut and nut holder are manufactured as a single unit, they form a double-threaded nut with the same direction of rotation but different pitch and bore diameter. The advantages are integrated manufacturing, reduced costs, and easy installation. The disadvantages are that it is specialized and not universally applicable.

[0021] Preferably, the pitch of the internal thread at one end of the nut holder and the external thread at one end of the hollow screw is greater than the pitch of the threads on the nut and the screw. This is because when the nut holder and the nut rotate on the screw by the same angle, the displacement of the nut holder on the hollow screw is greater than the displacement of the nut on the screw.

[0022] Preferably, the nut is connected to one end of the hollow screw and the pawl, forming a dedicated nut with a hollow screw and pawl. The connection method is unrestricted, but they must rotate synchronously after connection. The advantages are integrated manufacturing, reduced cost, and easy installation. The disadvantages are that it is dedicated and not universally applicable.

[0023] Preferably, one end of the bolt thread is cylindrical. A damping washer is installed in the bolt thread hole through which the anti-loosening washer and the fastened object pass, preventing them from rotating on the bolt. A nylon washer, etc., is an example. Its function is to increase the resistance to the rotation of the anti-loosening washer on the bolt.

[0024] Preferably, one end of the bolt thread is a prism, and the through hole for the anti-loosening washer and the fastened object is a prism-shaped through hole. The purpose is to prevent the anti-loosening washer and the fastened object from rotating on the bolt.

[0025] Preferably, the ratchet is placed in a ratchet mounting groove at one end of the ratchet seat, and the ball is placed in a ball movement groove within the ratchet seat. The keyhole on the ratchet seat is a dedicated key insertion hole. Its function is as follows: when the key is inserted into the keyhole on the ratchet seat, turning the key causes the ball track on the key to push the ball into the ball positioning groove on the ratchet, placing the ratchet and ratchet seat together. Rotating the ratchet seat will cause the ratchet to rotate as a unit. Conversely, if the key is not inserted into the keyhole on the ratchet seat, the ball is not compressed within the ratchet seat, and the ratchet and ratchet seat are separated. Rotating the ratchet seat will not cause the ratchet to rotate as a unit.

[0026] Preferably, the number of cams on the ratchet, the ball positioning grooves on the outer side of the ratchet, the keyholes on the ratchet seat, and the number of keys are consistent with the number of pawls and balls. The purpose is that the cam, corresponding to the pawl's pressure, forces the pawl out of its positioning groove. When a key is inserted into the keyhole on the ratchet seat and rotated, the ball's grooves, which transition from deep to shallow on the key, force the ball into the ball positioning groove on the ratchet. (Note: The ball grooves on the key, transitioning from deep to shallow, are equivalent to the uneven serrations on a flat key.)

[0027] Preferably, the ratchet and ratchet seat are manufactured as a single unit, and the ratchet seat does not have a ratchet placement slot, a ball bearing slot, or a keyhole. The advantage is that the ratchet and ratchet seat are manufactured as a single unit, resulting in a simple structure and eliminating the need for a key and a ball bearing. The disadvantage is that it is only suitable for use in locations where there is no intentional disassembly.

[0028] Note: The tightening and loosening of a set of anti-loosening devices is hereinafter referred to as the device. Attached Figure Description

[0029] Figure 1 This is an exploded view of the device.

[0030] Figure 2 This is a top view of the nut holder.

[0031] Figure 3 This is a three-dimensional view of the nut holder.

[0032] Figure 4 This is a bottom view of the nut holder.

[0033] Figure 5 This is a top view of a hollow screw.

[0034] Figure 6 This is a three-dimensional view of a hollow screw.

[0035] Figure 7 This is a bottom view of a hollow screw.

[0036] Figure 8 This is a top view of the ratchet.

[0037] Figure 9 It is a three-dimensional view of a ratchet.

[0038] Figure 10 This is a bottom view of the wheel.

[0039] Figure 11 This is a top view of the ratchet assembly.

[0040] Figure 12 This is a three-dimensional view of the ratchet seat.

[0041] Figure 13 This is a bottom view of the ratchet assembly.

[0042] Figure 14 This is a top view of the anti-loosening washer.

[0043] Figure 15 This is a three-dimensional view of the anti-loosening washer.

[0044] Figure 16 This is a bottom view of the anti-loosening washer.

[0045] Figure 17 It is a top view of the object being fastened.

[0046] Figure 18 It is a three-dimensional view of the object being fastened.

[0047] Figure 19 It is a bottom view of the object being fastened.

[0048] Figure 20This is a cross-section of a schematic diagram showing a nut holder rotating on one end of a hollow screw. The diagram shows the nut holder rotating on the external thread at one end of the hollow screw, with a ratchet connected to the other end. The ratchet's function is to control the unidirectional rotation of the hollow screw.

[0049] Figure 21 What you see is a cross-section of the ratchet, ratchet seat, ball bearing, lock washer, and the object being fastened, as well as a structural diagram showing the ratchet fitted onto the prism at one end of the bolt. The ratchet rests in the ratchet seat's ratchet groove and fits onto one end of the lock washer. The boss at one end of the lock washer inserts into the groove of the object being fastened, and the lock cone on the boss is embedded in the object. The ball bearing remains in its movable groove without being compressed. The prism at one end of the bolt passes through the prismatic through-holes of the object being fastened and the lock washer screw, its function being to prevent the object being fastened and the lock washer from rotating on the bolt. The bolt head is engaged in the bolt positioning groove at one end of the object being fastened, its function being to prevent the bolt from rotating on the object being fastened.

[0050] Figure 22 This is a cross-section of the device after it has been tightened. The diagram shows the nut in the nut slot at one end of the nut holder, rotating along with the hollow screw on the bolt. This compresses the anti-loosening washer, forcing the protrusion at one end of the washer into the groove of the object being tightened. The anti-loosening cone on the protrusion at one end of the washer also engages with the object. A pawl connected to one end of the hollow screw is supported by a pawl positioning groove at one end of the anti-loosening washer, controlling the hollow screw to rotate in one direction. The ball in the ratchet seat is not compressed by the slide rail on the key and remains in the ball movement groove of the ratchet seat. Since the ball is not forced into the ball positioning groove on the ratchet, the ratchet seat and the ratchet are in a separated state.

[0051] Figure 23 This is a cross-section of the device when the key is inserted into the keyhole on the ratchet seat, indicating that the device needs to be disassembled. The diagram shows that after the key is inserted, it rotates at a certain angle, and a groove on the key, from deep to shallow, forces the ball into the ball positioning groove on the ratchet, thus connecting the ratchet and ratchet seat. Rotating the ratchet seat then causes the ratchet to rotate as a unit. When the cam on the ratchet presses against the pawl connected to one end of the hollow screw, the pawl moves towards the screw, forcing the pawl, which is supported in the pawl positioning groove at the anti-loosening washer end, to leave the groove, thus releasing the unidirectional rotation control of the hollow screw at the anti-loosening washer end.

[0052] Note: As shown in the diagram, the number of pin tumblers on the key increases or decreases according to the number of pins. The position, shape, and size of the tumblers on the key are also set according to the position, shape, and size of the pins. The key and corresponding pins in the diagram are for use in situations requiring encryption and prevention of destructive removal of the nut. Otherwise, the ratchet seat and ratchet are manufactured as a single unit. The key holder does not have a keyhole, and the key and pins are omitted.

[0053] Figure 24 The diagram you see is of the device. Figure 22 The diagram simplifies the structure by connecting the nut to the hollow screw via a nut holder, showing a three-dimensional view of the nut directly connected to the pawl-equipped end of the hollow screw. The diagram shows the pawl-equipped end of the hollow screw connected to the nut end; the method of connection is unrestricted, allowing for either integral or separate manufacturing, with the parts meshing together. The purpose of this connection is to ensure that the nut and the pawl-equipped end of the hollow screw rotate as a single unit.

[0054] Figure 25 The cross-sectional view you see is of the device. Figure 22 The image shows a simplified view of the nut connected to the hollow screw via a nut holder, with the nut directly connected to the pawl-equipped end of the hollow screw. The image also shows a simplified structure where the ratchet and ratchet seat are manufactured as a single unit, omitting the keyhole, key, and pins.

[0055] In the diagram: 1 is a nut. 2 is a nut holder, 21 is a nut slot, and 22 is an internal thread. 3 is a hollow screw, 31 is an external thread, and 32 is a pawl. 4 is a ratchet, 41 is a cam, and 42 is a ball bearing positioning groove. 5 is a ratchet seat, 51 is a keyhole, 52 is a ratchet placement groove, 53 is a ball bearing in its movement groove, 54 is a key, and 55 is a ball bearing slide on the key. 6 is an anti-loosening washer, 61 is a pawl positioning groove, 62 is a prismatic through hole in the screw, 63 is a boss, and 64 is an anti-loosening cone on the boss. 7 is the object being fastened, 71 is a groove, 72 is a bolt head positioning groove, and 73 is a prismatic through hole in the screw. 8 is a bolt, and 81 is a prism. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed present invention, but merely represents some embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0057] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the basic orientation or positional relationship, or the orientation or positional relationship as commonly understood by those skilled in the art. Such terms are only for the convenience of this utility model and to simplify the description, and do not mean that the device or component referred to must have a specific orientation, or a specific orientational structure or operation. Therefore, they should not be construed as limitations on this utility model.

[0058] The first embodiment of the device fastening is implemented as follows.

[0059] First step, such as Figure 20 The structural diagram shows the nut holder 2 rotated onto one end of the hollow screw 3.

[0060] The second step, as Figure 21 The structural diagram shows that the ratchet 4 is placed in the ratchet placement groove 52 at one end of the ratchet seat 5, and the ball 53 is placed in the ball movement groove at one end of the ratchet seat 5. Then, they are both seated on one end of the anti-loosening washer 6. The boss 63 at the other end of the anti-loosening washer 6 is inserted into the groove 71 on the object being fastened. The prism 81 at one end of the bolt passes through the screw through hole 73 of the object being fastened 7 and the screw through hole 62 of the anti-loosening washer 6. The bolt head is then engaged in the bolt positioning groove 72 at one end of the object being fastened.

[0061] The third step, as Figure 22 This is a cross-sectional view of the device after it has been tightened. The installation sequence shown in the figure is as follows: First, the object 7 to be tightened is placed on the bolt 8. The bolt positioning groove 72 at one end of the object to be tightened faces the head of the bolt 8, and the groove 71 at the other end corresponds to the boss 63 on the anti-loosening washer. Then, the ratchet 4 is placed in the ratchet placement groove 52 on the ratchet seat, and the ball 53 is placed in the ball movement groove inside the ratchet seat. Then, they are all placed on one end of the anti-loosening washer 6. The nut 1 is installed in the nut slot 22 at one end of the nut holder 2, and the pawl 32 is connected to one end of the hollow screw 3. The internal thread 22 at the other end of the nut holder 2 is rotated onto the external thread 31 at one end of the hollow screw 3. Then, the hollow screw 3, nut holder 2, and nut 1, which are assembled together, are rotated together toward the anti-loosening washer 6 onto the screw of the bolt 8. When the nut 1 is rotated, the nut 1, along with the nut holder 2 and the hollow screw 3, will rotate together and press toward the anti-loosening washer 6. Increase the torque and continue rotating the nut 1 until the pawl 32 connected to the hollow screw 3 is supported by the pawl positioning groove 61 at one end of the anti-loosening washer 6. The anti-loosening cone 64 on the boss 63 at one end of the hollow screw 3 is then embedded into the groove 71 of the object being tightened. The tightening of a set of anti-loosening devices is now complete.

[0062] The first embodiment of the device disassembly is carried out as follows.

[0063] When the device needs to be disassembled, simply insert the key 54 into the keyhole 51 on the ratchet seat 5 and turn the key 54. The ball 53 in the ball movement groove inside the ratchet seat will be pushed into the ball positioning groove 42 on the ratchet 4 by the ball slide 55 on the key 54, making the ratchet seat 5 and the ratchet 4 a single unit. At this time, turning the ratchet seat 5 will cause the ratchet 4 to rotate as a unit. When the cam 41 on the ratchet presses against the pawl 32 connected to one end of the hollow screw, it will force the pawl 32 to move towards the screw. This will cause the pawl 32, which is supported in the pawl positioning groove 61 at the anti-loosening washer end, to leave the pawl positioning groove 61, releasing the unidirectional rotation control of the hollow screw 3 at the anti-loosening washer 6 end. Without the unidirectional rotation control, the reverse rotation of the hollow screw 3, along with the nut holder 2 and nut 1 at the same end, will be unrestricted, thus realizing the disassembly of the anti-loosening device.

[0064] The second embodiment of the device fastening is implemented as follows.

[0065] from Figure 25 The cross-sectional view of the structural schematic shows that nut 1 is directly connected to the end of hollow screw 3 with pawl 32. Ratchet 4 and ratchet seat 5 are manufactured as a single unit. The fastened object 7 does not have bolt positioning seat 72.

[0066] The installation sequence shown in the diagram is as follows: First, connect the boss 63 at one end of the anti-loosening washer to the groove 71 at the end of the object being fastened, then put them together on the prism 81 of the bolt 8. Next, put the integrated ratchet 4 and ratchet seat on the other end of the anti-loosening washer 6. Finally, ... Figure 24 As shown, nut 1 is directly connected to the end of hollow screw 3 with pawl 32, and rotates on the screw at one end of bolt 8. Rotate nut 1 to press it towards the anti-loosening washer 6. Increase the torque and continue rotating nut 1 until the pawl 32 connected to the hollow screw 3 at one end of nut 1 is supported by the pawl positioning groove 61 at one end of anti-loosening washer 6. Hollow screw 3 then inserts the anti-loosening cone 64 on the boss 63 at one end of anti-loosening washer 6 into the groove 71 of the object being fastened. The fastening of a set of anti-loosening devices is completed.

[0067] The second embodiment of the device disassembly is carried out as follows.

[0068] from Figure 25 The cross-sectional view of the structural schematic shows that nut 1 is directly connected to the end of hollow screw 3 with pawl 32. Ratchet 4 and ratchet seat 5 are manufactured as a single unit. The fastened object 7 does not have bolt positioning seat 72.

[0069] When the device needs to be disassembled, the ratchet 4 and ratchet seat 5, which are manufactured as a single unit, are rotated. When the cam 41 on the ratchet presses against the pawl 32 connected to the hollow screw at one end of the nut 1, the pawl 32 is forced to move towards the screw. This causes the pawl 32, which is supported in the pawl positioning groove 61 at one end of the anti-loosening washer, to leave the pawl positioning groove 61, thus releasing the unidirectional rotation control of the hollow screw 3 connected to one end of the nut 1 at the anti-loosening washer 6. Without unidirectional rotation control, the reverse rotation of the hollow screw 3 and the nut 1 at the same end is unrestricted, thus achieving the fastening and disassembly of the anti-loosening device.

Claims

1. A set of fastening and dismounting of a lock device, comprising: The utility model discloses a nut card seat, hollow screw rod, pawl, ratchet wheel, ratchet wheel seat, key, marble, lock washer, bolt and nut are composed, its characterized in that, the one end of nut card seat has nut card slot, the other end has internal thread, the one end of hollow screw rod has external thread, the other end is connected with pawl, and the pawl has elasticity, the ratchet wheel has cam, the outside of ratchet wheel has marble positioning slot, the ratchet wheel seat has ratchet wheel placing slot, marble movable slot and key insertion hole, the key has marble slide, and the marble slide on the key has deep to shallow, the one end of lock washer has pawl positioning slot, the other end has uneven boss, the boss has lock angle pyramid, the nut is installed in the nut card slot of the one end of nut card seat, and the one end of bolt is designed a prism.

2. A set of fastening and dismounting of the anti-loosening device according to claim 1, characterized in that, The nut is installed in the nut card slot of the one end of nut card seat, and the internal thread of the other end is rotated on the external thread of the one end of hollow screw rod.

3. The fastening and disassembly of a set of anti-loosening devices according to claim 2, characterized in that, When the nut and nut card seat are integrally manufactured, they are a double-threaded nut with the same turning direction, different pitch and different hole diameter.

4. A set of fastening and dismounting of a lock device according to claim 2 or 3, characterized in that, The pitch of the internal thread of the one end of nut card seat and the external thread of the one end of hollow screw rod is greater than the pitch of the thread on the nut and screw rod.

5. A set of fastening and dismounting of the anti-loosening device according to claim 1 or 2 or 3, characterized in that, The one end of the nut and hollow screw rod connecting pawl is connected together, which is a special nut with hollow screw rod and pawl, and the connecting method is not limited, but the nut and hollow screw rod must be synchronously rotated after being connected.

6. The fastening and unfastening of a set of anti-loosening devices according to claim 1, characterized in that, The one end of the screw rod on the bolt is a cylinder, and the damping washer is installed in the screw rod through hole of lock washer and the fastened object to prevent the lock washer and the fastened object from rotating on the screw rod.

7. The fastening and unfastening of a set of anti-loosening devices according to claim 1, characterized in that, The one end of the screw rod on the bolt is a prism, and the screw rod through hole of lock washer and the fastened object is a prismatic through hole.

8. The fastening and unfastening of a set of anti-loosening devices according to claim 1, characterized in that, The ratchet wheel is placed in the ratchet wheel placing slot of the one end of ratchet wheel seat, the marble is placed in the marble movable slot in the ratchet wheel seat, and the key insertion hole on the ratchet wheel seat is a special insertion hole for the key.

9. The fastening and unfastening of a set of anti-loosening devices according to claim 1, characterized in that, The number of the cam on the ratchet wheel and the marble positioning slot on the outside of the ratchet wheel is consistent with the number of the pawl and the marble.

10. The fastening and unfastening of a set of anti-loosening devices according to claim 1, characterized in that, The ratchet wheel and ratchet wheel seat are integrally manufactured, and the ratchet wheel placing slot, marble movable slot and key insertion hole are not arranged on the ratchet wheel seat.

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