CN213478905U

CN213478905U - Composite double-nut anti-loose bolt

Info

Publication number: CN213478905U
Application number: CN202021072319.2U
Authority: CN
Inventors: 邬惠林
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-06-18
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a compound two nut check bolts, including last gasket, lower gasket, upper nut, lower nut and screw, its characteristic: the screw comprises a nut, an upper bolt rod and a lower bolt rod which are integrally manufactured, the rotating direction of the thread of the upper bolt rod is just opposite to that of the thread of the lower bolt rod, the diameter of the upper bolt rod is slightly larger than that of the lower bolt rod, and an upper nut can directly penetrate through the lower bolt rod and is screwed on the thread of the upper bolt rod; the lower nut is screwed on the thread of the lower bolt rod; the proportion of the upper part and the lower part of the screw bolt rod follows the following principle: the screw bolt rod is inserted into the upper gasket, the upper connecting piece, the lower connecting piece and the lower gasket in sequence, and then the upper nut is screwed, at the moment, the rearmost part of the tail part of the upper nut is not screwed on the thread of the upper bolt rod but is hung on the thread of the lower bolt rod, and the lower nut is directly screwed on the upper nut; and finally, spot welding the 1-2 parts by a high-frequency cold welding machine to connect the upper nut and the lower nut into a whole.

Description

Composite double-nut anti-loose bolt

Technical Field

The utility model relates to a mechanical fastener field, concretely relates to compound double nut check bolt.

Background

At present, the bolt structure easily causes the fixed equipment to become flexible because of the continuous vibration of equipment, and then causes equipment trouble and accident scheduling problem. The diameter of the existing Down's anti-loose bolt is variable and discontinuous, so the overall strength of the bolt is insufficient, the bolt is easy to break and is difficult to process; the existing check bolt has the defects of complex structure, complexity, unreliability, more parts, heavy weight, high cost and difficult mass production.

There are four types of threaded fasteners commonly used on the market for preventing loosening:

the first is friction lock. This is the case with the hadlock locknuts in japan. Eventually, the nut will loosen and the threaded coupling will fail.

The second way is mechanical anti-loosening. The relative rotation of the screw thread pairs is directly limited by a braking piece. Such as cotter pins, steel wires, and snap washers. This way the disassembly is inconvenient.

The third mode is rivet punch anti-loosening. After the screw is screwed down, the thread pair loses the characteristics of the kinematic pair by adopting methods such as punching, welding and the like so as to be connected into a non-detachable connection. The disadvantage of this approach is that the bolt can only be used once and is difficult to remove, necessitating destruction of the bolt to allow removal.

The first three types of anti-loosening methods mainly rely on the third person to perform anti-loosening, which mainly refers to friction.

The fourth mode is structure looseness prevention, and the application number CN2019114170640 double-nut same-diameter positive and negative bidirectional composite thread looseness prevention and anti-theft self-locking bolt adopts a reticular thread and multiple elastic self-locking structure looseness prevention. However, the same-diameter positive and negative bidirectional compound threads of the application are obviously weak, so that the practicability is poor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model provides a compound double-nut locking bolt.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:

the utility model provides a compound double nut check bolt, includes gasket, lower gasket, last nut, lower nut and screw, characterized by:

the screw comprises a nut, an upper bolt rod and a lower bolt rod which are integrally manufactured, the rotating direction of the threads of the upper bolt rod is just opposite to the rotating direction of the threads of the lower bolt rod, the diameter of the upper bolt rod is slightly larger than that of the lower bolt rod, and the upper nut can directly penetrate through the lower bolt rod and be screwed on the threads of the upper bolt rod; the lower nut is screwed on the thread of the lower bolt rod; the proportion of the upper part and the lower part of the screw bolt rod follows the following principle: the screw bolt rod is inserted into the upper gasket, the upper connecting piece, the lower connecting piece and the lower gasket in sequence, and then the upper nut is screwed, at the moment, the rearmost part of the tail part of the upper nut is not screwed on the thread of the upper bolt rod but is hung on the thread of the lower bolt rod, and the lower nut is directly screwed on the upper nut; and finally, spot welding the 1-2 parts by a high-frequency cold welding machine to enable the upper nut and the lower nut to be connected into a whole through welding spots. The portable high-frequency cold welding machine is small and exquisite and portable at present, can be charged without an external power supply for use in the field, and is convenient and simple to use and fine in welding spot. The portable polisher is small and exquisite portable at present, and the accessible charges and need not external power supply and uses in the field, and convenient to use is simple, can polish rapidly and go up the solder joint of nut and lower nut, twists off nut and last nut again according to this, just can take out the screw to do not destroy the shank of bolt of screw, the screw can continue to use, and last nut and lower nut after the solder joint polished can also continue to use moreover.

Alternatively, neither the upper nor the lower shim is required, or only one of them is required.

The beneficial effects of the utility model are that, the utility model has the advantages of simple and reasonable structure, the production required precision is lower, because compound two nuts are screwed up on last shank of bolt screw and lower shank of bolt screw that direction of rotation is just in time opposite, restrict mutually, locking effect is excellent, bolt bulk strength is high, as long as polish earlier during the dismantlement and go up the solder joint of nut and lower nut, screw and upper nut are twisted off according to this again, just can take out the screw, and do not destroy the shank of bolt of screw, upper nut and lower nut after the solder joint is polished can also continue to use moreover.

Drawings

The invention will be further described with reference to the accompanying drawings and examples. Fig. 1 is a schematic view of the application of the present invention, and fig. 2 is a schematic view of a screw of the present invention.

In the figure, 1 is an upper nut, 2 is a lower nut, 3 is a nut, 4 is an upper bolt shank, 5 is a lower bolt shank, 6 is an upper washer, 7 is an upper connector, 8 is a lower connector, 9 is a lower washer, and 10 is a welding point.

Detailed Description

As shown in fig. 1, a composite double-nut anti-loose bolt comprises an upper gasket 6, a lower gasket 7, an upper nut 1, a lower nut 2 and a screw, and is characterized in that:

as shown in fig. 2, the screw comprises a nut 3, an upper bolt rod 4 and a lower bolt rod 5 which are integrally manufactured, the thread rotation direction of the upper bolt rod 4 is a clockwise screwing direction, the thread rotation direction of the lower bolt rod 5 is a counterclockwise screwing direction, the thread rotation direction of the upper bolt rod 4 is just opposite to the thread rotation direction of the lower bolt rod 5, the diameter of the upper bolt rod 4 is 5mm, the diameter of the lower bolt rod 5 is 4mm, the diameter of the upper bolt rod 4 is slightly larger than that of the lower bolt rod 5, and the upper nut 1 can directly penetrate through the lower bolt rod 5 and be screwed on the thread of the upper bolt rod 4; the lower nut 2 is screwed on the thread of the lower bolt rod 5; the proportion of the upper part and the lower part of the screw bolt rod follows the following principle: the screw bolt rod is inserted into the upper gasket 6, the upper connecting piece 7, the lower connecting piece 8 and the lower gasket 9 in sequence, and then the upper nut 1 is screwed, at the moment, the rearmost part of the tail part of the upper nut 1 is not screwed on the thread of the upper bolt rod 4 but is hung and sleeved on the thread of the lower bolt rod 5, and the lower nut 2 is directly screwed on the upper nut 1; and finally, spot welding the position 1 by a high-frequency cold welding machine to enable the upper nut 1 and the lower nut 2 to be connected into a whole through a welding spot 10. The portable high-frequency cold welding machine is small and portable at present, can be charged without an external power supply for use in the field, is convenient and simple to use, and has fine welding spots 10. The portable polisher of present is small and exquisite portable, and the accessible charges and need not external power supply and uses in the field, and convenient to use is simple, can polish rapidly and go up the solder joint 10 of nut 1 and lower nut 2, twists off nut 2 and last nut 1 according to this again, just can take out the screw to do not destroy the shank of bolt of screw, the screw can continue to use, and last nut 1 and lower nut 2 after solder joint 10 polished off can also continue to use moreover.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical spirit of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a compound double nut check bolt, includes gasket, lower gasket, last nut, lower nut and screw, characterized by:

the screw comprises a nut, an upper bolt rod and a lower bolt rod which are integrally manufactured, the rotating direction of the threads of the upper bolt rod is just opposite to the rotating direction of the threads of the lower bolt rod, the diameter of the upper bolt rod is slightly larger than that of the lower bolt rod, and the upper nut can directly penetrate through the lower bolt rod and be screwed on the threads of the upper bolt rod; the lower nut is screwed on the thread of the lower bolt rod; the proportion of the upper part and the lower part of the screw bolt rod follows the following principle: the screw bolt rod is inserted into the upper gasket, the upper connecting piece, the lower connecting piece and the lower gasket in sequence, and then the upper nut is screwed, at the moment, the rearmost part of the tail part of the upper nut is not screwed on the thread of the upper bolt rod but is hung on the thread of the lower bolt rod, and the lower nut is directly screwed on the upper nut; and finally, spot welding the 1-2 parts by a high-frequency cold welding machine to enable the upper nut and the lower nut to be connected into a whole through welding spots.

2. A composite double nut anti-loose bolt as defined in claim 1, characterized in that:

neither the upper nor the lower shim is required, or only one of them is required.