CN110653310A

CN110653310A - Quick safety tool for preventing screw thread from loosening

Info

Publication number: CN110653310A
Application number: CN201910869519.6A
Authority: CN
Inventors: 林晨阳; 张永红; 陈威; 唐飞熊; 崔新立
Original assignee: CETC 2 Research Institute
Current assignee: CETC 2 Research Institute; Southwest China Research Institute Electronic Equipment
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-01-07
Anticipated expiration: 2039-09-16
Also published as: CN110653310B

Abstract

The invention relates to a safety tool used in the field of mechanical assembly, and discloses a quick safety tool for preventing screw threads from loosening. The roller is located in the round cavity of the sleeve, the outer diameters of two ends of the roller are in small clearance fit with the inner cavity of the sleeve, and the roller can freely rotate in the sleeve. The screw rod of the locking device is screwed into the threaded hole of the roller, and by rotating the locking device, the outer conical surface of the screw rod of the locking device is attached to or separated from the inner conical surface of the roller, so that the metal fuse can be locked or loosened. The cover plate is fixedly connected with the sleeve through 4 GB819 screws, and the roller is limited in the sleeve. By using the invention, compared with the traditional manual fuse making, the efficiency can be improved by more than 200% under the same fuse making condition, and an operator is protected from cutting damage of the metal fuse.

Description

Quick safety tool for preventing screw thread from loosening

Technical Field

The invention relates to a safety tool used in the field of mechanical assembly, in particular to a quick safety tool for preventing loosening of threads.

Background

In the field of mechanical assembly, a widely used thread anti-loosening mode is to use the tension of a metal fuse to perform insurance. At present, only a pure manual operation mode can be adopted, the efficiency is low, and the metal fuse is very thin, so that the cutting injury to an operator is easily caused.

The national aviation industry standard HB 0-2-2002 anti-loosening method for threaded connection and pin connection stipulates that: the "6.3 fuse should be wound with no gaps between the buttons. A buckle is a full turn of the fuse at one end relative to the other. The number of the buckles is not less than 3 buckles in the length of 10mm for the fuse with the diameter d being less than or equal to 0.8mm, is not less than 2 buckles in the length of 10mm for the fuse with the diameter d being greater than 0.8mm, and the end part of the fuse of 6.5 is wound by 3-4 buckles and is pressed. For example, a 40mm length fuse with a diameter d of 0.3mm requires at least 18 twisted pairs. The pure manual operation mode has extremely low efficiency and can be completed in at least 2-3 minutes.

On the other hand, in the field of precision assembly, the space for making a fuse is small, and the manual operation for realizing the double-twisting of the metal fuse is difficult.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the tool has the advantages of being simple to operate, small in size, convenient to assemble and disassemble metal fuses and the like, achieves quick clamping of the metal fuses through threaded connection, and achieves quick double-twisting of the metal fuses through a sleeve and roller structure.

The technical scheme adopted by the invention is as follows: a quick-action safety tool for loosening prevention of threads, comprising: the device comprises a roller, a locking device and a sleeve;

the roller is positioned in the sleeve, and the roller freely rotates in the sleeve;

one end of the roller is provided with 2 first round holes, the other end of the roller is provided with a threaded hole, the other end of the roller is provided with 2 second round holes, the 2 first round holes are respectively concentric with the 2 second round holes, and metal fuses penetrate through the 2 first round holes and the 2 second round holes;

one end of the locking device is a screw rod, and the screw rod is matched with the threaded hole in the roller to control the attachment or separation of the locking device and the roller.

Furthermore, an inner conical surface is formed on one end face of the roller, which is provided with a threaded hole, the threaded hole is positioned at the bottom of the inner conical surface, and the second round hole at the position 2 is positioned on the inner conical surface.

Furthermore, the middle of a screw rod on the locking device is an external conical surface, the screw rod is matched with the threaded hole, the external conical surface of the screw rod is controlled to be attached to or separated from the internal conical surface of the roller, and the metal fuse is locked or loosened.

Furthermore, the other end of the locking device is a flat milling boss used for rotating a screw rod on the locking device.

Further, a circular flat bottom cavity is formed in the inner side of the sleeve, and a through hole with the diameter slightly smaller than that of the circular cavity is formed in the bottom of the circular flat bottom cavity; the sleeve has 2 notches in the symmetrical shape, and 4 threaded holes in one end of the sleeve.

Furthermore, the outer diameters of the two ends of the roller are larger than the outer diameter of the middle of the roller, knurling is pressed on the outer diameter of the middle of the roller, and a knurling area in the middle of the roller is exposed out of a gap in the position of the sleeve appearance 2.

Further, the first round hole is a round hole with the diameter phi 1, and a V-shaped counter bore with the angle of 90 degrees is formed in the hole opening of the first round hole; the second round hole is a round hole with the diameter phi of 3-5.

Further, the safety tool also comprises a cover plate, and the cover plate limits the roller in the round flat bottom cavity of the sleeve.

Furthermore, the cover plate is provided with 4 countersunk holes, and a circular through hole with the diameter slightly smaller than the outer diameter of the roller is processed on the inner side of the cover plate; the countersunk holes on the cover plate 4 are fixedly arranged with the threaded holes on the sleeve 4 through screws.

Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows:

the invention provides a quick fuse driving tool for preventing looseness of threads, which has the advantages of simple operation, small volume, convenience in assembly and disassembly of a metal fuse and the like, and realizes quick clamping of the metal fuse by threaded connection and quick double-twisting of the metal fuse by a sleeve and roller structure. By using the invention, compared with the traditional manual fuse making, the efficiency can be improved by more than 200% under the same fuse making condition, and an operator is protected from cutting damage of the metal fuse.

Drawings

FIG. 1 is a schematic of a securing mechanism for thread anti-loosening;

fig. 2 and 3 are schematic perspective views of the present invention;

FIG. 4 is a schematic view of a half-section of the present invention;

fig. 5 and 6 are schematic perspective views of the roller in fig. 2 and 3;

FIG. 7 is a schematic perspective view of the locking device of FIGS. 2 and 3;

FIG. 8 is a perspective view of the sleeve of FIGS. 2 and 3;

FIG. 9 is a schematic perspective view of the cover plate of FIGS. 2 and 3;

reference numerals: shown in the figure: 1 is a roller, 2 is a locking device, 3 is a sleeve, 4 is a cover plate, and 5 is a metal fuse.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, for the anti-loosening screw-threading operation, a metal fuse needs to pass through a fuse hole at the head of one screw (the right screw in fig. 1), be twisted, then pass through a fuse hole at the head of the other screw (the left screw in fig. 1), and be sheared after being twisted.

As shown in fig. 2 and 3, a quick-acting safety tool for preventing loosening of threads comprises a roller, a locking device, a sleeve and a cover plate. The roller is located in the round cavity of the sleeve, the outer diameters of two ends of the roller are in small clearance fit with the inner cavity of the sleeve, and the roller can freely rotate in the sleeve. The screw rod of the locking device is screwed into the threaded hole of the roller, and by rotating the locking device, the outer conical surface of the screw rod of the locking device is attached to or separated from the inner conical surface of the roller, so that the metal fuse can be locked or loosened. The cover plate is fixedly connected with the sleeve through 4 GB819 screws, and the roller is limited in the sleeve.

Preferably, the roller is in an I shape, namely the outer diameters of two ends are larger, the outer diameter of the middle part is slightly smaller, and knurling is pressed at the outer diameter of the middle part.

Preferably, one end face of the roller is provided with 2 phi 1 first round holes, and a V-shaped 90-degree counter bore is formed in an orifice; the inner conical surface is provided with 2 second round holes with the diameter phi of 3-phi 5, and the second round holes are concentric with the 2 phi 1 first round holes, so that the problem that the phi 1 milling cutter cannot penetrate through the roller due to insufficient processing depth is solved.

Preferably, the other end of the locking pile is a flat milling boss, and the locking device can be rotated by clamping the flat milling boss with two fingers.

Preferably, the inner side of the sleeve is a circular flat bottom cavity, and a through hole with the diameter slightly smaller than that of the circular cavity is machined in the cavity bottom. The through-hole diameter slightly is less than the mesh of circle chamber diameter and is lived the gyro wheel, prevents that the gyro wheel from the inside roll-off of sleeve, simultaneously, and the metal fuse of being convenient for continues to extend after passing the gyro wheel, beats the fuse.

Preferably, the roller intermediate knurled area emerges from the indentation of the sleeve profile 2.

Preferably, the inner side of the cover plate is provided with a circular through hole with a diameter slightly smaller than the outer diameter of the roller, the circular through hole is used for milling a flat boss, manual rotation and locking of the fuse are facilitated, and meanwhile the fuse can enter the first circular hole and the second circular hole in the roller from the inner conical surface of the locking device conveniently.

Example 2

The metal fuse is twisted:

as shown in fig. 4, two ends of the metal fuse wire are respectively inserted into 2 phi 1 round holes of the roller, and a V-shaped 90-degree counter bore is formed in the 2 phi 1 round hole of the roller, so that the metal fuse wire can be guided to be accurately inserted. And after the head of the metal fuse contacts the outer conical surface of the screw rod of the locking device, the metal fuse penetrates through a gap between the inner conical surface of the roller and the outer conical surface of the screw rod of the locking device. And tightening the locking device, wherein the metal fuse is locked by the outer conical surface of the screw rod of the locking device and the inner conical surface of the roller, and simultaneously, the rebound force of the extruded metal fuse forms the pretightening force for the screw thread of the screw rod of the locking device, so that the screw rod of the locking device is self-locked after being tightened. The clamping part shown in figures 2 and 3 is held by one hand, and the knurled area of the roller is stirred by the other hand, so that the rapid twining of the metal fuse can be realized. During the twinning process, the metal fuses on the left side of fig. 2, 3 and 4 may be accidentally twisted together, the locking device is unscrewed, the metal fuses are pulled out from the right side, and the metal fuses hinged on the left side are automatically separated by the tool.

The method comprises the following specific steps of:

1) passing a metal fuse through a fuse hole in the head of one screw (the right screw in fig. 1);

2) respectively penetrating two ends of a metal fuse into the tool, screwing the locking device, and vigorously shifting the roller to twist the metal fuse for a certain number of turns; unscrewing the locking device and pulling out the metal fuse from the tool;

3) a metal fuse is inserted into a fuse hole at the head of another screw (the left screw in the figure 1);

4) respectively penetrating two ends of a metal fuse into the tool, screwing the locking device, and vigorously shifting the roller to twist the metal fuse for a certain number of turns; cutting off the metal fuse by using diagonal pliers; unscrewing the locking device pulls the metal fuse scrap out of the inventive tool.

The time for one-time insurance making by pure manual operation is about 2-3 minutes, the time for making insurance by adopting the invention is less than 40 seconds, and the efficiency can be improved by more than 200% under the same insurance making condition.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.

Claims

1. A quick-action safety tool for preventing loosening of threads, comprising: the device comprises a roller, a locking device and a sleeve;

2. The quick-acting anti-loosening safety tool for screw threads of claim 1, wherein the roller is provided with an inner conical surface on one end surface of the threaded hole, the threaded hole is positioned at the bottom of the inner conical surface, and the 2-position second round hole is positioned on the inner conical surface.

3. The quick safety tool for preventing loosening of threads as claimed in claim 1, wherein the middle of the screw rod on the locking device is an external conical surface, the screw rod is matched with the threaded hole, and the external conical surface of the screw rod is controlled to be attached to or separated from the internal conical surface of the roller, so that the metal fuse is locked or loosened.

4. The quick safety tool for preventing loosening of threads according to claim 1, wherein the other end of the locking device is a flat milling boss for rotating a screw on the locking device.

5. The quick safety tool for preventing loosening of threads according to claim 1, wherein the inner side of the sleeve is a circular flat bottom cavity, and a through hole with a diameter slightly smaller than that of the circular cavity is formed at the bottom of the circular flat bottom cavity; the sleeve has 2 notches in the symmetrical shape, and 4 threaded holes in one end of the sleeve.

6. A quick-action anti-loosening tool as claimed in claim 5, wherein the outer diameter of the roller at both ends is larger than the outer diameter of the roller at the middle part, and the outer diameter of the roller is knurled, and the knurled area of the roller at the middle part is exposed from the gap of the sleeve shape 2.

7. The quick safety tool for preventing loosening of threads according to claim 1, wherein the first round hole is a round hole with the diameter phi 1, and a V-shaped 90-degree counter bore is formed in an orifice of the first round hole; the second round hole is a round hole with the diameter phi of 3-5.

8. The quick safety tool for preventing loosening of threads of claim 5, further comprising a cover plate that confines the roller within the circular flat bottom cavity of the sleeve.

9. The quick-acting safety tool for preventing loosening of threads of claim 8, wherein the cover plate is provided with 4 countersunk holes, and a circular through hole with a diameter slightly smaller than the outer diameter of the roller is machined in the inner side of the cover plate; the countersunk holes on the cover plate 4 are fixedly arranged with the threaded holes on the sleeve 4 through screws.