CN216719229U

CN216719229U - High-sensitivity nut loosening early warning piece and integrated early warning nut

Info

Publication number: CN216719229U
Application number: CN202220008295.7U
Authority: CN
Inventors: 罗洋; 杨小虎; 陈书泽; 孙安朋; 瞿红立; 还梦媛; 李奇敏
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-06-10
Anticipated expiration: 2032-01-05

Abstract

The utility model discloses a high-sensitivity nut loosening early warning piece and an integrated early warning nut. By adopting the technical scheme, the alarm device can be triggered in time when the original nut is only slightly loosened, the sensitivity is extremely high, and the screwing process of mounting the high-sensitivity nut loosening early warning piece on the bolt and the original nut is very light and labor-saving, so that the assembly difficulty is greatly reduced; the integral type early warning nut not only possesses the not hard up all advantages of early warning piece of high sensitivity nut, can directly realize threaded connection with the bolt cooperation moreover, has cancelled solitary nut, has reduced the quantity of spare part, has reduced the installation degree of difficulty, has promoted the installation effectiveness.

Description

High-sensitivity nut loosening early warning piece and integrated early warning nut

Technical Field

The utility model relates to the technical field of threaded connecting parts, in particular to a high-sensitivity nut loosening early warning part and an integrated early warning nut.

Background

The bolt and the nut are matched to form threaded connection, and the load borne by the bolt can fluctuate in the using process, so that the nut is likely to loosen after long-term use. For part of application scenarios, the nut is not acceptable to be loosened, and even slight loosening can bring about serious influence. Therefore, various intelligent nuts are produced on the market, so that the small looseness of the nuts can be expected to be found in time, an alarm can be given out immediately, people can conveniently and quickly identify the nuts, and the nuts are overhauled and maintained.

The intelligent nut is mainly composed of two parts, one part is a base body which synchronously rotates with the original nut, and the other part is a friction ring piece which can be oppositely fixedly sleeved on the bolt. In order to ensure high sensitivity of the intelligent nut, the friction ring piece is usually made of a high-elasticity material so as to ensure that the friction resistance between the friction ring piece and the bolt is extremely high, and even if the primary nut only slightly loosens, the friction ring piece cannot be driven by the base body and can give an alarm in time; if in order to reduce the installation difficulty of the intelligent nut, only the friction resistance between the friction ring piece and the bolt can be reduced, the sensitivity of the intelligent nut can be greatly reduced, and the friction ring piece is driven by the base body to rotate a small distance when the primary nut is slightly loosened, so that the micro loosening of the primary nut cannot be identified. Therefore, it is always difficult to make a perfect look at the choice of friction ring.

It is urgent to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a high-sensitivity nut loosening early warning piece and an integrated early warning nut.

The technical scheme is as follows:

the utility model provides a not hard up early warning piece of high sensitivity nut, includes the device base member and sets up the alarm device on the device base member, the spacing lug has on the outer peripheral face of triggering the ring spare, set up one section on the device base member and rotate spacing groove with spacing lug sliding fit, be provided with on the device base member with bolt screw-thread fit's internal thread mounting hole, be equipped with its pivoted ring spare of triggering relatively on the pore wall of this internal thread mounting hole, the one end terminal surface of this spacing lug is provided with fixed contact, be provided with the movable contact with fixed contact looks adaptation on the one end cell wall that rotates spacing groove and fixed contact are adjacent, its main points lie in: the trigger ring piece is sleeved on the bolt, the friction force between the trigger ring piece and the bolt is larger than the friction force between the device substrate and the bolt, and the trigger ring piece can be locked on the bolt through the phase limiting structure;

when the device base body rotates towards the direction of screwing the bolt, the phase limiting structure unlocks the trigger ring piece, the limiting lug is abutted against the groove wall of one end, far away from the movable contact, of the rotating limiting groove so as to drive the fixed contact and the movable contact to be separated, and the alarm device stops; when the device substrate is connected with the primary nut, the phase limiting structure locks the trigger ring; when the device substrate is driven by the primary nut to rotate reversely, the phase limiting structure locks the trigger ring piece, the device substrate drives the movable contact to move to be abutted against the fixed contact, and the alarm device is started.

By adopting the structure, the requirement on the material of the trigger ring piece is very low, and the trigger ring piece can be driven by the bolt to be acted a little by a little when the device substrate rotates towards the direction of screwing the bolt, so that the fixed contact and the movable contact are kept to be separated, therefore, the trigger ring piece can be made of hard plastics and other materials, the manufacturing cost is reduced, the screwing process of the high-sensitivity nut loosening early warning piece arranged on the bolt and the original nut is very light and labor-saving, and the assembly difficulty is greatly reduced; and after the device substrate is installed in place, the triggering ring piece is completely locked on the bolt through the phase limiting structure, and even if the primary nut only slightly loosens, the triggering ring piece cannot be driven by the substrate, so that the alarm device can be triggered in time, and the sensitivity is extremely high.

Preferably, the method comprises the following steps: the phase limiting structure comprises a set screw, a set screw hole penetrating through the trigger ring in the radial direction and a kidney-shaped hole penetrating through the device substrate in the radial direction, the kidney-shaped hole extends along the circumferential direction of the device substrate, the head of the set screw is in sliding fit with the kidney-shaped hole, the set screw hole is located on the inner side of the kidney-shaped hole and is in threaded fit with the set screw, and when the set screw penetrates through the kidney-shaped hole and the set screw hole in sequence and is locked on a bolt, the relative position of the trigger ring and the bolt can be locked.

By adopting the structure, the trigger ring piece can be reliably locked through the fastening screw and the fastening screw hole, and the head of the fastening screw is in sliding fit with the kidney-shaped hole to avoid interference and clamping stagnation when the device substrate is loosened along with the primary nut.

Preferably, the method comprises the following steps: the alarm device comprises an alarm circuit board and a battery for supplying power to the alarm circuit board, wherein an alarm module is integrated on the alarm circuit board, and the alarm module and the battery are connected in series between the movable contact and the fixed contact;

when the movable contact is contacted with the fixed contact, the alarm module is started; when the movable contact is separated from the fixed contact, the alarm module is stopped.

By adopting the structure, the signal can be transmitted outwards, so that maintenance personnel can remotely know loosening information, and the method is simple and reliable.

Preferably, the method comprises the following steps: the fixed contact and the movable contact are both copper sheets.

By adopting the structure, the corrosion resistance is good, and the structure is stable and reliable.

Preferably, the method comprises the following steps: and one end of the device substrate, which is close to the native nut, is provided with a fastener for connecting the native nut.

By adopting the structure, the synchronous rotation of the device substrate and the primary nut is ensured, so that the micro rotation of the primary nut is accurately identified.

Preferably, the method comprises the following steps: the device substrate is of a hexagonal prism structure.

By adopting the structure, the wrench is convenient to rotate, and the operation is simplified.

The utility model provides an integral type early warning nut, its main points lie in: the high-sensitivity nut looseness early warning piece comprises a nut base body and the high-sensitivity nut looseness early warning piece, wherein one end face of the nut base body is fixedly connected with the adjacent end face of the device base body.

By adopting the structure, the nut loosening early warning device has the advantages of not only having high sensitivity, but also being capable of being directly matched with the bolt to realize threaded connection, canceling independent nuts, reducing the number of parts, reducing the installation difficulty and improving the installation efficiency.

Preferably, the method comprises the following steps: the device base member is the cylinder structure, the nut base member is hexagonal prism structure.

By adopting the structure, the nut base body is assembled and disassembled, so that the damage caused by applying acting force on the device base body during disassembly is avoided.

Preferably, the method comprises the following steps: the nut base body is provided with a central threaded hole, and the aperture of the central threaded hole is equal to the apertures of the internal thread mounting hole and the central hole of the ring piece.

By adopting the structure, the reliability of connection of the integrated early warning nut and the bolt can be effectively improved.

Compared with the prior art, the utility model has the beneficial effects that:

by adopting the high-sensitivity nut loosening early warning piece and the integrated early warning nut in the technical scheme, the high-sensitivity nut loosening early warning piece can trigger the alarm device in time when the original nut is only slightly loosened, the sensitivity is extremely high, the screwing process of mounting the high-sensitivity nut loosening early warning piece on the bolt and the original nut is very light and labor-saving, the assembly difficulty is greatly reduced, and meanwhile, the triggering ring piece can be made of hard plastics and other materials, so that the manufacturing cost is reduced; the integral type early warning nut not only possesses the not hard up all advantages of early warning piece of high sensitivity nut, can directly realize threaded connection with the bolt cooperation moreover, has cancelled solitary nut, has reduced the quantity of spare part, has reduced the installation degree of difficulty, has promoted the installation effectiveness.

Drawings

FIG. 1 is a schematic structural view of a high-sensitivity nut loosening warning part;

FIG. 2 is a cross-sectional view of a high sensitivity nut loosening warning element in cooperation with a bolt and a native nut;

FIG. 3 is a schematic view showing the fitting relationship between the rotation limiting groove and the limiting protrusion without loosening;

FIG. 4 is a schematic view of the engagement relationship between the rotation limiting groove and the limiting protrusion under the loosening condition;

FIG. 5 is an exploded view of the device body, connector and fastener;

FIG. 6 is a schematic diagram showing the fit relationship between the device substrate and the fastening member when the high-sensitivity nut loosening warning member is connected to the native nut;

FIG. 7 is a schematic view of the fit relationship between the device substrate and the fastener when the high-sensitivity nut loosening warning element is not connected to the native nut;

FIG. 8 is a schematic structural view of an integrated early warning nut;

fig. 9 is a cross-sectional view of the integrated early warning nut in engagement with a bolt.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1-4, a high-sensitivity nut loosening warning component mainly comprises a device substrate 1 and a warning device 6 arranged on the device substrate 1, wherein an internal thread mounting hole 11 in threaded fit with a bolt 5 is arranged on the device substrate 1, and a trigger ring member 2 capable of rotating relative to the internal thread mounting hole 11 is arranged on the hole wall of the internal thread mounting hole 11. In this embodiment, the device substrate 1 has a hexagonal prism structure, so that rotation by a wrench is facilitated, and operation is simplified.

The trigger ring piece 2 is sleeved on the bolt 5, and the friction force between the trigger ring piece 2 and the bolt 5 is larger than the friction force between the device substrate 1 and the bolt 5. In this embodiment, the ring center hole 21 of the trigger ring 2 is in threaded fit or friction fit with the bolt 5, and the trigger ring 2 can be locked on the bolt 5 by the phase-defining structure. The outer peripheral surface of the trigger ring member 2 is provided with a limiting bump 22, and the device substrate 1 is provided with a section of rotation limiting groove 12 in sliding fit with the limiting bump 22, so that the rotation angle of the device substrate 1 relative to the trigger ring member 2 can be limited through the sliding fit of the limiting bump 22 and the rotation limiting groove 12. Meanwhile, a fixed contact 3 is arranged on one end face of the limiting bump 22, and a movable contact 4 matched with the fixed contact 3 is arranged on one end groove wall of the rotation limiting groove 12 adjacent to the fixed contact 3.

Therefore, when the device base body 1 rotates towards the direction of screwing the bolt 5, the phase limiting structure unlocks the trigger ring piece 2, as the ring piece center hole 21 of the trigger ring piece 2 is in threaded fit or friction fit with the bolt 5, at the beginning, the device base body 1 rotates relative to the trigger ring piece 2, then the limiting lug 22 is abutted against the groove wall of one end of the rotation limiting groove 12 far away from the movable contact 4, the device base body 1 drives the trigger ring piece 2 to rotate synchronously, at the moment, the fixed contact 3 and the movable contact 4 are kept separated, and the alarm device 6 stops.

When the device substrate 1 is completely screwed, the device substrate 1 is connected with the primary nut 9, namely, the device substrate 1 and the primary nut 9 rotate synchronously, and then the trigger ring 2 is locked through the phase limiting structure, so that the device substrate 1 and the primary nut 9 further rotate synchronously.

Correspondingly, when the device base body 1 is driven by the primary nut 9 to rotate reversely, the phase limiting structure locks the trigger ring 2, the primary nut 9 can drive the device base body 1 to rotate relative to the bolt 5 synchronously, namely, the device base body 1 rotates reversely, at the moment, the device base body 1 drives the movable contact 4 to move to abut against the fixed contact 3, and the alarm device 6 is started.

Referring to fig. 2 and 9, the alarm device 6 includes an alarm circuit board 61 and a battery 62 for supplying power to the alarm circuit board 61, an alarm module is integrated on the alarm circuit board 61, and the alarm module and the battery 62 are connected in series between the movable contact 4 and the fixed contact 3. When the movable contact 4 is contacted with the fixed contact 3, the alarm module is started; when the movable contact 4 is separated from the fixed contact 3, the alarm module is stopped. Therefore, when the movable contact 4 is separated from the fixed contact 3, the whole alarm device is in a power-off state, the power of the battery 62 cannot be lost, the power of the battery 62 is only naturally attenuated, and the service life of the alarm ring triggered by loosening of the nut is prolonged.

Referring to fig. 1 and 2, the phase defining structure includes a set screw 7, a set screw hole 23 penetrating through the trigger ring 2 in the radial direction, and a kidney-shaped hole 13 penetrating through the device substrate 1 in the radial direction, the kidney-shaped hole 13 extending along the circumferential direction of the device substrate 1, and the length of the kidney-shaped hole 13 in the circumferential direction of the device substrate 1 is longer than that of the set screw hole 23. The head of the set screw 7 is in sliding fit with the kidney-shaped hole 13, and the set screw hole 23 is positioned on the inner side of the kidney-shaped hole 13 and is in threaded fit with the set screw 7. When the set screw 7 passes through the kidney-shaped hole 13 and the set screw hole 23 in sequence and is locked on the bolt 5, the relative positions of the trigger ring 2 and the bolt 5 can be locked. Therefore, when the primary nut 9 is loosened, the device substrate 1 rotates a certain angle relative to the trigger ring 2, and through the design of the kidney-shaped hole 13, the head of the set screw 7 is displaced in the kidney-shaped hole 13, so that interference and clamping stagnation can be avoided.

Due to the fact that the set screw 7 is arranged, the requirement on the material of the trigger ring piece 2 is very low, and the trigger ring piece 2 can be driven by a little acting force of the bolt 5 to enable the fixed contact 3 and the movable contact 4 to be kept separated as long as the device base body 1 rotates towards the direction of tightening the bolt 5, therefore, the trigger ring piece 2 can be made of hard plastics and other materials, manufacturing cost is reduced, the screwing-in process of the high-sensitivity nut loosening early warning piece arranged on the bolt 5 and the native nut 9 is light and labor-saving, and assembly difficulty is greatly reduced.

Further, the ring piece center hole 21 is preferably an internal thread hole in threaded fit with the bolt 5, and can be better matched with the bolt 5, so that clamping stagnation is reduced, and the whole installation of the high-sensitivity nut loosening early warning piece is easier.

In the embodiment, the fixed contact 3 and the movable contact 4 are both copper sheets, so that the corrosion resistance is good, and the stability and reliability are high. And the copper sheets are anchored on the side parts of the limiting lug 22 or the rotary limiting groove 12 through rivets and then bent and attached to the corresponding ends.

Referring to fig. 2, 5-7, a fastener 8 capable of moving axially is arranged at one end of the device base body 1 close to the primary nut 9, the fastener 8 is provided with a fastener central through hole 81 coaxial with the internal thread mounting hole 11, a gap is left between the fastener central through hole 81 and the bolt 5, a hexagonal sunken groove 82 matched with the primary nut 9 is formed in a recessed mode in an end face of one end of the fastener 8 far away from the device base body 1, one end of the fastener 8 close to the device base body 1 is provided with fastener one-way teeth 83 surrounding the fastener central through hole 81, and one end of the device base body 1 close to the fastener 8 is provided with base body one-way teeth 14 matched with the fastener one-way teeth 83.

Since the fastener 8 can freely move in the axial direction of the device base body 1 when no external force is applied. Therefore, when the high-sensitivity nut loosening warning element does not lock the primary nut 9, the base unidirectional helical teeth 14 are separated from the fastener unidirectional helical teeth 83, and at this time, the device base 1 can freely rotate bidirectionally relative to the fastener 8.

When the fastener 8 is about to lock the primary nut 9, the end face of one end of the primary nut 9 is embedded into the hexagonal sunk groove 82, the fastener 8 is connected with the primary nut 9, so that the primary nut 9 and the primary nut are synchronously rotated, at the moment, the primary nut 9 can drive the one-way helical teeth 14 of the base body of the fastener 8 to be meshed with the one-way helical teeth 83 of the fastener, so that the device base body 1 can only rotate in one direction relative to the direction of the fastener 8 close to the primary nut 9, and the device base body 1 can only lock the primary nut 9 more and more through the fastener 8, and cannot rotate reversely.

Furthermore, the end of the device base body 1, which is far away from the alarm device 6, is provided with a connecting piece 15, and the fastening piece 8 is axially movably mounted on the device base body 1 through the connecting piece 15, so that the device base body is simple and reliable.

In addition, referring to fig. 2, a waterproof gasket 16 is arranged between the trigger ring member 2 and the fastening member 8, and the waterproof gasket 16 plays a sealing role in the device substrate 1, so that water and impurities are prevented from entering the device substrate 1, and the operation reliability of the high-sensitivity nut loosening early warning member is ensured.

Referring to fig. 8 and 9, an integrated nut with an early warning function includes a nut base 10 and the high-sensitivity nut loosening early warning component, where an end face of one end of the nut base 10 is fixedly connected to an adjacent end face of the device base 1. Integral type early warning nut not only possesses the not hard up all advantages of early warning piece of high sensitivity nut, can directly realize threaded connection with 5 cooperations of bolt moreover, has cancelled solitary nut, has reduced the quantity of spare part, has reduced the installation degree of difficulty, has promoted the installation effectiveness.

Further, the device base body 1 is of a cylindrical structure, the nut base body 10 is of a hexagonal prism structure, and the nut base body 10 is assembled and disassembled, so that damage caused by acting force applied to the device base body 1 during disassembly is avoided.

In addition, the nut base body 10 is provided with a central threaded hole 101, the central threaded hole 101 is a cylindrical hole, and the aperture of the central threaded hole 101 is larger than the apertures of the internal thread mounting hole 11 and the ring piece central hole 21, so that the clamping stagnation problem can be effectively avoided, and the mounting of the integrated early warning nut is smoother.

Similarly, referring to fig. 9, a waterproof gasket 16 is arranged between the trigger ring 2 and the nut base 10, and the waterproof gasket 16 has a sealing effect on the device base 1, so that water and impurities are prevented from entering the device base 1, and the operation reliability of the integrated early warning nut is ensured.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a high sensitivity nut is not hard up early warning piece, includes device base member (1) and alarm device (6) of setting on device base member (1), be provided with on device base member (1) with bolt (5) screw-thread fit's internal thread mounting hole (11), be equipped with on the pore wall of this internal thread mounting hole (11) and trigger ring spare (2) that can its pivoted relatively, spacing lug (22) have on the outer peripheral face of this trigger ring spare (2), set up one section and spacing lug (22) sliding fit's rotation spacing groove (12) on device base member (1), the one end terminal surface of spacing lug (22) is provided with fixed contact (3), rotate spacing groove (12) and fixed contact (3) adjacent one serve be provided with movable contact (4) with fixed contact (3) looks adaptation, its characterized in that: the trigger ring piece (2) is sleeved on the bolt (5), the friction force between the trigger ring piece (2) and the bolt (5) is larger than the friction force between the device substrate (1) and the bolt (5), and the trigger ring piece (2) can be locked on the bolt (5) through a phase limiting structure;

when the device base body (1) rotates towards the direction of screwing the bolt (5), the phase limiting structure unlocks the trigger ring piece (2), the limiting lug (22) is abutted against the groove wall of one end, far away from the movable contact (4), of the rotating limiting groove (12) so as to drive the fixed contact (3) and the movable contact (4) to be separated, and the alarm device (6) is stopped; the phase-defining structure locks the trigger ring (2) when the device base body (1) is connected with the primary nut (9); when the device base body (1) is driven by the primary nut (9) to rotate reversely, the phase limiting structure locks the trigger ring piece (2), the device base body (1) drives the movable contact (4) to move to be abutted against the fixed contact (3), and the alarm device (6) is started.

2. The high-sensitivity nut loosening warning piece according to claim 1, wherein: the phase limiting structure comprises a set screw (7), a set screw hole (23) penetrating through the trigger ring (2) in the radial direction and a kidney-shaped hole (13) penetrating through the device substrate (1) in the radial direction, the kidney-shaped hole (13) extends along the circumferential direction of the device substrate (1), the head of the set screw (7) is in sliding fit with the kidney-shaped hole (13), the set screw hole (23) is located on the inner side of the kidney-shaped hole (13) and is in threaded fit with the set screw (7), and when the set screw (7) penetrates through the kidney-shaped hole (13) and the set screw hole (23) in sequence and is locked on the bolt (5), the relative positions of the trigger ring (2) and the bolt (5) can be locked.

3. The high-sensitivity nut loosening warning piece according to claim 1, wherein: the alarm device (6) comprises an alarm circuit board (61) and a battery (62) for supplying power to the alarm circuit board (61), an alarm module is integrated on the alarm circuit board (61), and the alarm module and the battery (62) are connected in series between the movable contact (4) and the fixed contact (3);

when the movable contact (4) is contacted with the fixed contact (3), the alarm module is started; when the movable contact (4) is separated from the fixed contact (3), the alarm module is stopped.

4. The high-sensitivity nut loosening warning piece according to claim 1, wherein: the fixed contact (3) and the movable contact (4) are both copper sheets.

5. The high-sensitivity nut loosening warning piece according to claim 1, wherein: one end of the device base body (1) close to the native nut (9) is provided with a fastener (8) used for connecting the native nut (9).

6. The high-sensitivity nut loosening warning piece according to claim 1, wherein: the device substrate (1) is of a hexagonal prism structure.

7. The utility model provides an integral type early warning nut which characterized in that: the high-sensitivity nut loosening early warning piece comprises a nut base body (10) and the high-sensitivity nut loosening early warning piece as claimed in any one of claims 1 to 4, wherein one end face of the nut base body (10) is fixedly connected with the adjacent end face of the device base body (1).

8. The integrated early warning nut of claim 7, wherein: the device base body (1) is of a cylindrical structure, and the nut base body (10) is of a hexagonal prism structure.

9. The integrated early warning nut of claim 7, wherein: the nut base body (10) is provided with a central threaded hole (101), and the diameter of the central threaded hole (101) is equal to that of the internal thread mounting hole (11) and the ring central hole (21).