WO2019153926A1

WO2019153926A1 - Anti-loosening and anti-disengagement bolt and nut assembly and anti-loosening and disengagement bolt and anti-loosening and disengagement nut thereof

Info

Publication number: WO2019153926A1
Application number: PCT/CN2018/123812
Authority: WO
Inventors: 林平; 林高山; 林威特; 林高森
Original assignee: 林平
Priority date: 2018-02-12
Filing date: 2018-12-26
Publication date: 2019-08-15

Abstract

An anti-loosening and anti-disengagement bolt and nut assembly, an anti-loosening and disengagement bolt and an anti-loosening and disengagement nut thereof, the assembly mainly comprising the anti-loosening and disengagement bolt and the anti-loosening and disengagement nut, wherein the anti-loosening and disengagement bolt comprises a bolt head (11) and a screw rod (13); an end portion of the screw rod is provided with a groove (14) and an expansion cutting groove (15), the groove being internally provided with an internal thread (16), and a screw (2) being screwed into the groove by means of the internal thread so as to cooperate with the screw rod; the anti-loosening and disengagement nut comprises a first nut (41) and a second nut (44), the first nut being provided thereon with a boss (43), and the boss being provided thereon with a tightening cutting groove (42); the second nut is provided thereon with a second groove (45) that is mounted in cooperation with the boss on the first nut. The anti-loosening and anti-disengagement bolt and nut assembly has simple a manufacturing process and low production costs, is easy to operate, and may effectively prevent shocks and prevent loosening

Description

Anti-loose and anti-off bolt and nut assembly and anti-loose bolt and anti-loose nut

Technical field

The invention belongs to the technical field of mechanical fastening, in particular to a anti-loose and anti-off bolt nut assembly and a anti-loose bolt and a anti-loose nut.

Background technique

The bolt and nut assembly has a wide range of applications on a daily basis. It is mainly used for the installation and fastening of various components. The existing nut is a nut with internal thread, which is easy to install and disassemble, but has poor anti-loose and anti-vibration functions. For example, when the Hadlock nut of Japan is used in high-speed rail, engine, etc., it is easily heated. After the heat is expanded, the nut will loosen, and after normal use, a vertical line will be drawn on the two nuts and bolts. The maintenance personnel are If the line is found to be offset during the inspection, it needs to be re-tightened, and the labor is increased at any time.

Summary of the invention

The object of the present invention is to overcome the above drawbacks, and provide a anti-loose and anti-off bolt nut assembly and a anti-loose bolt and a anti-loose nut. The manufacturing process is simple, the production cost is low, the operation is simple and convenient, and the anti-shock and anti-loose can be effectively prevented. .

The anti-loose bolt comprises a bolt head and a screw, the screw end is provided with a groove and an expansion slot, and the groove is provided with an internal thread, and the screw is screwed into the groove by the internal thread to cooperate with the screw.

Further, the screw is a taper screw, and the minimum size of the lower end of the screw is the same as the diameter of the internal thread in the groove.

Further, the bolt head is provided with a anti-loose flange, and the anti-loose flange and the bolt head are integrated.

Further, the expansion slits are evenly distributed by three to seven.

Further, the screw is provided with a waterproof cover, and the upper end of the waterproof cover is provided with a thread, and the waterproof cover is matched with the screw by a thread.

Further, a rubber cover is disposed on an upper portion of the waterproof cover on the screw.

The anti-loose nut includes a nut, and an end surface of the flange nut is provided with an inclined surface, and an angle between the inclined surface and the end surface of the nut when the inclined surface is matched is b.

Further, the value of b ranges from greater than 0° to less than or equal to 6°.

The anti-loose and anti-off bolt nut assembly comprises the above-mentioned anti-loose bolt and the anti-loose nut, and the anti-loose bolt and the anti-loose nut are threaded.

The anti-loose nut includes a first nut and a second nut, the first nut is provided with a boss, the boss is provided with a shrinking slot; and the second nut is provided with the first nut The second groove of the boss is fitted to each other.

Further, the height of the boss is h, and the value range of h is greater than 0.4 times the diameter of the internal thread of the first nut, and is less than or equal to 3 times the diameter of the internal thread of the first nut.

Further, the boss on the first nut is an eccentric boss.

Further, a stud is disposed on one end surface of the first nut, and an outer thread is disposed on an outer side of the stud, and the shrinking slot on the boss extends to the stud, and the second nut is provided with a second a groove, the first groove and the stud cooperate with each other.

Further, a flange is disposed on the other end surface of the first nut, and the flange is integrated with the first nut.

Further, a card slot is further disposed on the second nut, and a rain cover is mounted on the card slot.

The anti-loose and anti-off bolt nut assembly comprises the anti-loose bolt and the anti-loose nut, and the anti-loose bolt and the anti-loose nut are threaded.

Compared with the prior art, the beneficial effects of the present invention are:

1. The invention has simple manufacturing process, low cost and simple and convenient operation, materials can be selected according to the use, and can be reused to avoid one-time waste; resistant to high-intensity fatigue vibration, capable of preventing off-closure, anti-loose and anti-shock, at a lower level Looseness can also be avoided at temperatures;

2. The anti-loose bolt of the present invention expands the end of the bolt by adding a groove and a screw with an expansion slot, thereby effectively preventing the nut from loosening;

3. The anti-loose nut of the invention realizes self-locking of the nut through the inclined surface through the nut and the flange nut which are mutually matched, thereby further preventing the nut from being loosened;

4. The stud and the external thread are added to the first nut of the anti-loose nut of the present invention, and the first groove and the internal thread are matched with the stud on the second nut, and the first nut and the first nut can be increased after tightening. Friction between the two nuts to avoid loosening between the first nut and the second nut;

5. The outer thread of the anti-loose nut has a transition fit or interference fit between the external thread and the internal thread, and the shrink groove is provided on the boss, and the slot is tightened during the tightening process of the first nut and the second nut. Will shrink inwardly and "hold" the bolt, thereby increasing the friction between the bolt and the first nut and the second nut, avoiding looseness;

6. The boss on the first nut is an eccentric boss. When the first nut and the second nut are tightened, the wedge inside the nut is formed, forcing the bolt and the stud to slightly deform, and also increasing the external thread and the inner thread. Friction between the threads to prevent loosening between the first nut and the second nut;

7. The second nut and the bolt are also installed with a rain cover; the rain cover prevents rainwater from entering the first nut along the threaded joint, thereby avoiding corrosion of the tightening and grooving of the first nut;

8. A rubber cover and a waterproof cover are added to the anti-loose bolt of the present invention to prevent rainwater from entering the groove to corrode the screw.

DRAWINGS

Figure 1 is a schematic view showing the structure of the anti-loose bolt;

Figure 2 is a plan view of the screw and the bolt head;

3 is a schematic structural view of Embodiment 2;

Figure 4 is a schematic structural view of a flange nut;

Figure 5 is a schematic structural view of Embodiment 3;

6 is a schematic structural view of a first nut in the fourth embodiment;

Figure 7 is a front elevational view of the first nut of the fourth embodiment;

Figure 8 is a front elevational view of the second nut of the fourth embodiment;

Figure 9 is a schematic structural view of Embodiment 5;

Figure 10 is a front elevational view of the first nut of the sixth embodiment;

Figure 11 is a front elevational view of the second nut of the sixth embodiment;

Figure 12 is a schematic structural view of Embodiment 7;

Figure 13 is a partial enlarged view of a portion A of Figure 1;

Figure 14 is a plan view of the second nut of the fourth embodiment.

In the figure, 11, bolt head; 12, anti-loose flange; 13, screw; 14, groove; 15, expansion slot; 16, internal thread; 17, section; 2, screw; 21, rubber cover; , waterproof cover; 31, nut; 32, flange nut; 33, inclined surface; 34, contact point; 41, first nut; 42, shrink groove; 43, boss; 44, second nut; Second groove; 46, first groove; 47, slit; 48, stud; 49, external thread; 50, flange; 51, rain cover; 52, card slot; 53, claw; 54, card notch.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Embodiment 1 : As shown in FIG. 1 , FIG. 2 and FIG. 16 , the anti-loose bolt includes a bolt head 11 and a screw 13 , and the bolt head 11 is provided with a anti-loose flange 12 , and the anti-loose flange 12 is integral with the bolt head 11, the end of the screw 13 is provided with a groove 14 and an expansion slot 15, the expansion slot 15 is evenly distributed three to seven, the groove 14 is provided with an internal thread 16, and the screw 2 passes The internal thread 16 is screwed into the groove 14 to cooperate with the screw 13; as shown in FIG. 13, the screw 2 is a taper screw, and the angle between the external thread and the axial direction is a, and the value of a ranges from greater than 0°. 5 or less, the value of a is preferably 1.15°; if the value of a is 0°, it does not work for looseness; if the value of a is too large, it is not easy to screw into the groove 14 of the screw 13 It also causes breakage of the screw 13.

The smallest dimension of the lower end of the screw 2 coincides with the diameter of the internal thread 16 in the recess 14, so that when the screw 2 is screwed into the recess 14, the end of the screw 13 is slightly expanded by the expansion slot 15.

In the production of the embodiment, the screw 2 may further be provided with a waterproof cover 22, the upper end of the waterproof cover 22 is provided with a thread, and the waterproof cover 22 is screwed with the screw 2; the upper part of the waterproof cover 22 of the screw 2 is provided with a rubber cover 21. When the screw 2 is mounted, the waterproof cover 22 is pressed by the rubber cover 21, and the waterproof cover 22 covers the screw 13, thereby effectively preventing water droplets or the like from entering the groove 14 to corrode the screw 13.

Embodiment 2: As shown in FIG. 3 and FIG. 4, the anti-loose nut includes a nut 31 and a flange nut 32. The end surface of the flange nut 32 is provided with an inclined surface 33. When the inclined surface 33 is engaged The angle between the end face of the nut 31 is b, and the value of b is greater than 0°, less than or equal to 6°, and the value of b is preferably 1.2°; if the value range is too large, the anti-looseness cannot be achieved. The purpose of anti-off.

Embodiment 3: As shown in FIG. 5, the anti-loose and bolt-off nut assembly includes the anti-loose bolt according to the first embodiment and the anti-loose nut according to the second embodiment, and the anti-loose bolt and The release nut is mounted by a threaded fit, the expansion slot 15 has three end portions 17 of the screw 13 and at least one of the sections 17 is deformed by the screw 2 External expansion. The number of the expansion slits 15 cannot be too much or too small, and the amount is too small to achieve the effect of expanding and preventing the nut 31 from loosening, and the amount is too large to easily deteriorate the strength of the screw 13.

In the production of this embodiment, the screw 2 can selectively mount the waterproof cover 22 and the rubber cover 21 as needed.

The working principle of the installation and use of this embodiment is as follows:

As shown in FIG. 3 and FIG. 5, the anti-loose bolt of the first embodiment is sleeved on the object to be mounted, and then the flange nut 32 is screwed onto the anti-loose bolt, and the nut 31 is screwed into the anti-loose. When the nut 31 is in contact with the flange nut 32, the nut 31 and the end surface of the flange nut 32 do not closely fit due to the action of the inclined surface 33, but only one contact point 34 is contacted, and the nut 31 is applied. Under the action of the force, a downward force F1 is generated at the contact point 34 of the flange nut 32, so that the left side of the flange nut 32 generates a moment A1 that rotates to the right, forcing the flange nut 32 to rotate to the right. However, due to the presence of the screw 13, the flange nut 32 will not be turned to the right side, but will force the screw 13 to be pressed, so that the left thread of the flange nut 32 generates a force F3 to the screw 13, so that the left side The thread is tightly fitted to the screw 13 and does not loosen, and does not come loose even in the event of vibration.

Since the force acts on each other, at the contact point 34, the flange nut 32 produces an upward force F2 to the nut 31, causing the right side of the nut 31 to produce a moment A2 that rotates to the left, forcing the nut 31 to rotate to the left. There is a tendency, but due to the presence of the screw 13, the nut 31 will not be turned to the left side, but the screw 13 will be pressed, so that the right thread of the nut 31 generates a force F4 to the screw 13, so that the right thread and the screw 13 is tightly fitted, and the left side thread has a certain gap with the screw 13, and when the screw 2 is screwed into the groove 14, the end of the screw 13 is slightly expanded by the expansion slit 15, and the expanded The place just fills the gap between the left side thread and the screw 13, so that the nut 31 on the screw 13 does not exit the screw 13 even in the case of looseness, even in the case of high-intensity fatigue vibration, it will not loosen. Take off.

Ordinary bolt and nut assembly will exhibit thermal expansion and contraction at a lower temperature, resulting in loosening of the nut. In this embodiment, the expansion of the end of the screw 13 by the screw 2 just fills the gap between the left thread and the screw 13. Therefore, even in a colder zone, the nut 31 does not exit the screw 13, and loosening does not occur.

Embodiment 4: As shown in FIG. 6 to FIG. 8 , the anti-loose nut includes a first nut 41 and a second nut 44. The first nut 41 is provided with a boss 43, and the boss 43 is eccentric. a bossing portion 43 is provided with a shrinking groove 42; the second nut 44 is provided with a second groove 45 which is fitted to the boss 43 of the first nut 41; the height of the boss 43 is h, The value range of h is greater than 0.4 times the diameter of the internal thread of the first nut 41, and is less than or equal to 3 times the diameter of the internal thread of the first nut. If h is too large or too small, the first nut 41 and the second nut 44 cannot be Play the purpose of anti-loose and anti-off.

Embodiment 5: As shown in FIG. 9 , the anti-loose bolt and bolt assembly includes the anti-loose bolt according to the first embodiment and the anti-loose nut according to the fourth embodiment, and the anti-loose bolt and the anti-loose The nut is installed by screwing. The angle between the external thread of the screw 2 and the axial direction is preferably 1.34°, and the number of the expansion slot 15 and the shrink slot 42 cannot be too much or too small, and the number is too small. The effect of not expanding and preventing the second nut 44 from loosening is too large to easily deteriorate the strength of the screw 13 and the boss 43.

The working principle used in this embodiment is:

As shown in FIG. 9, the anti-loose bolt is placed on the object to be mounted, and then the first nut 41 is screwed into the screw 13, and the second nut 44 is screwed into the screw 13, and the first nut 41 is convex. The table 43 is screwed into the second recess 45 of the second nut 44, and finally the screw 2 is screwed into the recess 14. The boss 43 on the first nut 41 is manufactured by eccentric machining, and the second nut 44 is a normal central circular process. When the first nut 41 and the second nut 44 are screwed together, just like a wedge is inserted into the nut. Thereby achieving the effect of anti-looseness.

Since the boss 43 on the first nut 41 is an eccentric boss, a gap 47 is left on the side between the boss 43 and the second groove 45 when tightened, but under the action of the shrink groove 42 The internal thread on the nut 41 will contract inwardly to "hold" the screw 13, and the rigid and soft threads increase the friction force to achieve high-strength fatigue vibration without loosening; and because the screw 2 is a taper screw, the screw 2 is screwed into In the groove 14, the end portion of the screw 13 is also slightly expanded by the expansion slit 15, and the external thread of the end portion of the screw 13 is expanded to increase the friction surface with the thread of the second nut 44, and the expanded portion. The gap 47 between the boss 43 and the second recess 45 is just filled, so that the first nut 41 and the second nut 44 on the screw 13 do not come loose even in the case where high-intensity fatigue vibration occurs.

The ordinary bolt and nut assembly may exhibit thermal expansion and contraction at a lower temperature, resulting in loosening of the nut. In this embodiment, due to the expansion of the screw 2 to the end of the screw 13, the first nut 41 is even in a colder zone. Also, the second nut 44 does not exit the screw 13, and the loosening does not occur.

Embodiment 6: As shown in FIG. 10 and FIG. 11 , a stud 48 is disposed on one end surface of the first nut 41 , and an outer thread 49 is disposed on an outer side of the stud 48 , and the boss 43 is tightened. The slot 42 extends to the stud 48. The second nut 44 is provided with a first recess 46. The first recess 46 and the stud 48 cooperate with each other; the other end surface of the first nut 41 is provided with a flange 50. The flange 50 is a hollow structure, and the flange 50 and the first nut 41 are integrally formed; the second nut 44 is further provided with a card slot 52, and two or more card slots 54 on the card slot 52, the card slot A rain cover 51 is attached to the 52, and the rain cover 51 is provided with a claw 53 corresponding to the number and position of the card slot 54; the other is the same as that of the fourth embodiment.

The flange 50 can prevent the second nut 44 and the first nut 41 from loosening and loosening when vibrating, thereby further achieving the effect of not loosening; the rain cover 51 is made of an elastic material, and the rain cover 51 is passed through the claw when installed. 53 is stuck on the card slot 54 and rotates the rain cover 51 to displace the claw 53 and the card slot 54. The rain cover 51 prevents rainwater from entering the first nut 41 along the threaded joint, thereby avoiding the first nut. 41 is corroded; there is a transition fit or an interference fit between the external threads 49 on the studs 48 and the internal threads of the first recess 46.

Embodiment 7: As shown in FIG. 12, the anti-loose bolt-and-bolt assembly includes the anti-loose bolt of the first embodiment and the anti-loose nut of the sixth embodiment, the anti-loose bolt and the anti-loose The nut is threaded.

The working principle used in this embodiment is:

The screw 13 is placed on the object to be mounted, and then the first nut 41 is screwed into the screw 13, and the second nut 44 is screwed into the first nut 41. The boss 43 on the first nut 41 is screwed into the second nut. The inner groove on the first groove 46 is sleeved on the external thread 49 of the stud 48, and the boss 43 is further provided with a shrink groove 42. The boss 43 on the first nut 41 is manufactured by eccentric machining, and the second nut 44 is a normal central circular process. When the first nut 41 and the second nut 44 are screwed together, the wedge in the nut is formed. Thereby achieving the effect of anti-looseness.

Since the boss 43 on the first nut 41 is an eccentric boss, a gap 47 is left between the boss 43 and the second groove 45 when tightened, but under the action of the tightening slot 42, the first nut 41 The upper internal thread will contract inwardly to "hold" the screw 13 on the stud 48, and then the internal thread on the first groove 46 and the external thread 49 on the stud 48 are tightened, and the inner flexible outer ring is The first nut 41 and the second nut 44 can increase the friction force by using threads of different hardness materials, can withstand low temperature, high temperature resistance, and strong vibration resistance, and can achieve the effect of not loosening; therefore, the first nut 41 located on the stud 48 and The second nut 44 does not loosen even in the case where high-intensity heat generation occurs.

Claims

An anti-loose bolt comprises a bolt head (11) and a screw (13), characterized in that: the end of the screw (13) is provided with a groove (14) and an expansion slot (15), and the groove (14) There is an internal thread (16), and the screw (2) is screwed into the groove (14) through the internal thread (16) to cooperate with the screw (13).
The anti-loose bolt according to claim 1, characterized in that the screw (2) is a taper screw, the smallest dimension of the lower end of the screw (2) and the diameter of the internal thread (16) in the groove (14) Consistent.
The anti-loose bolt according to claim 2, wherein the bolt head (11) is provided with a anti-loose flange (12), and the anti-loose flange (12) and the bolt head (11) are One piece structure.
The anti-loose bolt according to claim 3, characterized in that the expansion slits (15) are evenly distributed three to seven.
The anti-loose bolt according to claim 4, wherein the screw (2) is provided with a waterproof cover (22), the upper end of the waterproof cover (22) is provided with a thread, and the waterproof cover (22) is threaded and screwed. (2) Coordination.
The anti-loose bolt according to claim 5, characterized in that the upper part of the waterproof cover (22) of the screw (2) is provided with a rubber cover (21).
A tamper-proof nut, comprising a nut (31), further comprising a flange nut (32), the end surface of the flange nut (32) is provided with an inclined surface (33), and the inclined surface (33) is The angle between the mating and the end face of the nut (31) is b.
The anti-loose nut according to claim 6, wherein the value of b is greater than 0° and less than or equal to 6°.
A anti-loose bolt-and-bolt nut assembly, comprising the anti-loose bolt according to any one of claims 1 to 6 and the anti-loose nut according to claim 7 or 8, and the anti-loose bolt And the anti-loose nut is threaded.
A detachable nut, comprising: a first nut (41) and a second nut (44), wherein the first nut (41) is provided with a boss (43), and the boss (43) is provided There is a shrink groove (42); the second nut (44) is provided with a second groove (45) which is fitted to the boss (43) on the first nut (41).
The anti-loose nut according to claim 10, wherein the height of the boss (43) is h, h is greater than 0.4 times the diameter of the internal thread of the first nut (41), less than or equal to The internal diameter of the first nut is 3 times.
The anti-loose nut according to claim 11, characterized in that the boss (43) on the first nut (41) is an eccentric boss.
The anti-loose nut according to claim 12, wherein the first nut (41) has a stud (48) on one end surface thereof, and an external thread (49) on the outer side of the stud (48). The shrinking groove (42) on the boss (43) extends to the stud (48), and the second nut (44) is provided with a first groove (46), the first groove (46) ) Cooperate with the studs (48) by threads.
The anti-loose nut according to claim 13, wherein the other end surface of the first nut (41) is provided with a flange (50), the flange (50) and the first nut ( 41) is a one-piece structure.
The anti-loose nut according to claim 14, wherein the second nut (44) is further provided with a card slot (52), and the card slot (52) is provided with a rain cover (51) .
A lock-proof bolt-and-bolt nut assembly, comprising the anti-loose bolt according to any one of claims 1 to 6 and the anti-loose nut according to any one of claims 10 to 15, The anti-loose bolt and the anti-loose nut are threaded.