CN108799303A - Two-way derotation bolt assembly and its application method - Google Patents

Abstract

The invention relates to the technical field of bolt fastening, in particular to a bidirectional anti-rotation bolt assembly. It includes two-way anti-rotation bolts, fastening nuts and compression nuts. The fastening nuts and compression nuts are installed on the screw rod in a threaded manner. , the fastening nut and the compression nut are installed on the two-way anti-rotation bolt through the eccentric right-handed thread and the eccentric left-handed thread respectively. The fastening external thread and the large compression thread are respectively arranged on the fastening nut and the compression nut, and the fastening nut and the compression nut are connected together by the fastening external thread and the large compression thread. Compared with installing several nuts on the traditional one-way thread, the fastening reliability is stronger. By providing connecting threads on the fastening nut and the compression nut, the fastening nut and the compression nut are connected together, further increasing the fastening effect of the fastening nut and the compression nut connecting bolts.

Description

Two-way anti-rotation bolt assembly and method of use thereof

technical field

The invention relates to the technical field of bolt fastening, in particular to a bidirectional anti-rotation bolt assembly.

Background technique

There are a lot of bolts on the market. Generally, under static conditions, elastic parts can be added for further tightening, or one or two nuts can be added to strengthen the tightening. However, for occasions with vibration, the bolts are easy to loosen after one end is tightened for a while. For example, the bolts for fixing the rails, because trains often pass by on the rails, vibrations often occur. The number of inspections is too large and the route is too long, which is impractical.

Contents of the invention

In order to solve the above problems and propose a two-way anti-rotation bolt assembly.

A two-way anti-rotation bolt assembly includes a two-way anti-rotation bolt, a fastening nut and a compression nut, and the fastening nut and the compression nut are installed on the screw rod in a threaded manner. The bolt includes a polished rod, a nut and a threaded rod. The nut is located at the bottom of the polished rod, the threaded rod is located at the top of the polished rod, and the threaded rod is provided with an eccentric right-handed thread and an eccentric left-handed thread.

Preferably, the fastening nut includes a hexagonal nut body and a cylinder, wherein the cylinder is located at one end of the hexagonal nut body, a fastening internal thread is provided inside the cylinder, and a fastening external thread is provided outside the cylinder; A small compression thread and a large compression thread are set; wherein the fastening internal thread and the small compression thread cooperate with the thread on the threaded rod respectively, and the external fastening thread cooperates with the large compression thread.

Preferably, the fastening internal thread and the compression small thread are meshed with the eccentric right-handed thread and the eccentric left-handed thread respectively, and both the fastening external thread and the large compression thread are left-handed threads.

Preferably, the fastening internal thread and the compressing small thread are meshed with the eccentric left-handed thread and the eccentric right-handed thread respectively, and the fastening external thread and the compressing large thread are both right-handed threads.

Preferably, the cylinder is provided with open slots, the open slots run through the front and rear outer walls of the cylinder, and the open slots run through the top of the cylinder.

Preferably, an outer chamfer is provided on the outer circle of the top end of the cylinder, and an inner chamfer is provided at the connection between the small compression thread and the large compression thread.

Preferably, a convex rounding is provided on the outer circle of the top end of the cylinder, and a concave rounding is provided at the connection between the small compression thread and the large compression thread.

Preferably, the eccentric right-handed thread and the eccentric left-handed thread have the same pitch, which is equal to the pitch of the fastening external thread.

A method for using a bidirectional anti-rotation bolt assembly, the steps are as follows:

Step 1) first pass the two-way anti-rotation bolt through the first fastening piece and the second fastening piece;

Step 2) Then screw the fastening nut into the two-way anti-rotation bolt, and leave a gap greater than 1mm between the fasteners;

Step 3) Then screw the compression nut into the two-way anti-rotation bolt, and screw in the fastening nut at the same time, when the compression nut can no longer be screwed in relative to the fastening nut;

Step 4) Slowly screw in the fastening nut, and at the same time reversely rotate the compression nut until the fastening nut is fastened to the part to be fastened, and then tighten the compression nut.

The beneficial effects of the present invention are: the present invention relates to a two-way anti-rotation bolt assembly, by simultaneously setting left-handed and right-handed threads on the bolts, and then installing fastening nuts and compression nuts on the left-handed and right-handed threads respectively. Compared with installing several nuts on the traditional one-way thread, the fastening reliability is stronger. By providing connecting threads on the fastening nut and the compression nut, the fastening nut and the compression nut are connected together, further increasing the fastening effect of the fastening nut and the compression nut connecting bolts.

Description of drawings

Fig. 1 is a perspective view of the structure of the bolt assembly of the present invention.

Fig. 2 is an exploded view of the bolt assembly of the present invention.

Fig. 3 is a top view of the bolt assembly of the present invention.

Fig. 4 is the A-A view of Fig. 3 .

Fig. 5 is a perspective view of the structure of the two-way anti-helical bolt of the present invention.

Fig. 6 is a B-B view of Fig. 4 .

Fig. 7 is a perspective view of the fastening nut structure of the present invention.

Fig. 8 is a front view of the fastening nut structure of the present invention.

Fig. 9 is a C-C view of Fig. 8 .

Fig. 10 is a perspective view of the bottom structure of the compression nut of the present invention.

Fig. 11 is a perspective view of the structure of the compression nut according to the present invention.

Fig. 12 is a top view of the compression nut structure of the present invention.

Fig. 13 is a D-D view of Fig. 12 .

Among them: 1-two-way anti-rotating bolt; 2-fastening nut; 3-compression nut; 11-polished rod; 12-nut; 13-threaded rod; 14-blind hole at the end of the bolt; 21-hexagonal nut body; 22 -Cylinder; 23-fastening internal thread; 24-fastening external thread; 25-opening groove; 26-external chamfering; 31-compression small thread; - eccentric right-handed thread; 132 - eccentric left-handed thread.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a perspective view of the structure of the bolt assembly of the present invention. Fig. 2 is an exploded view of the bolt assembly of the present invention. Fig. 3 is a top view of the bolt assembly of the present invention. Fig. 4 is the A-A view of Fig. 3 . Fig. 5 is a perspective view of the structure of the two-way anti-helical bolt of the present invention. Fig. 6 is a B-B view of Fig. 4 . A two-way anti-rotation bolt assembly includes a two-way anti-rotation bolt 1, a fastening nut 2 and a compression nut 3, and the fastening nut 2 and the compression nut 3 are installed on a screw rod in a threaded manner. The two-way anti-rotation bolt 1 includes a polished rod 11, a nut 12, and a threaded rod 13. The nut 12 is located at the bottom of the polished rod 11, and the threaded rod 13 is located at the top of the polished rod 11. The threaded rod 13 is provided with an eccentric right-handed thread 131 and an eccentric left-handed thread. 132. A blind hole 14 at the end of the bolt is provided at the outer end of the threaded rod 13 to facilitate processing. An eccentric right-handed thread 131 and an eccentric left-handed thread 132 are set on the threaded rod 13 at the same time. 132, so that the nut of the left-hand thread and the nut of the right-hand thread can be installed on the threaded rod 13 at the same time. For example, the fastening nut 2 and the compression nut 3 may respectively have left-handed internal threads and right-handed internal threads. When the fastening nut 2 and the compression nut 3 are installed on the threaded rod 13, it is necessary to rotate the fastening nut 2 counterclockwise and the compression nut 3 clockwise to fasten the fastening nut 2 and the compression nut 3 to the threaded rod. on rod 13. When the fastening nut 2 and the compression nut 3 need to be unscrewed from the threaded rod 13, the fastening nut 2 needs to be rotated clockwise and the compression nut 3 is rotated counterclockwise. For conventional bolts, the bolts and nuts are easily loosened due to mechanical vibration. In this patent, bidirectional anti-helical threads are provided, because the direction of vibration can only be one direction, and it is impossible to cause the fastening nut 2 and the compression nut 3 to loosen together at the same time. When the direction of vibration is the same as the loosening direction of the fastening nut 2 , then the vibration will cause the compression nut 3 to be tighter, and the compression nut 3 can press the compression nut 2, thereby preventing the bolt and nut from loosening. In this patent, except that the fastening nut 2 and the compression nut 3 can be left-handed internal threads and right-handed internal threads respectively. It is also possible to set the fastening nut 2 and the compression nut 3 as right-handed internal threads and left-handed internal threads respectively. During use, generally be to install fastening nut 2 earlier, and then install compression nut 3, and fastening nut 2 is used for compressing to be fastened, and compression nut 3 is used for compressing fastening nut 2. In order to avoid mutual interference between the eccentric right-handed thread 131 and the eccentric left-handed thread 132, the outer tooth tips of the eccentric right-handed thread 131 and the outer tooth tips of the eccentric left-handed thread 132 are respectively located on both sides of the threaded rod 13, and are higher than the threaded rod. 13; and the tip of the inside of the eccentric right-handed thread 131 and the tip of the inside of the eccentric left-handed thread 132 are all located in the core of the threaded rod 13, that is, they are all lower than the surface of the threaded rod 13. Wherein said outer side refers to the direction of eccentric right-handed thread 131 and eccentric left-handed thread 132 away from the core of threaded rod 13 respectively, and inner side refers to the direction of eccentric right-handed thread 131 and eccentric left-handed thread 132 approaching the core of threaded rod 13 respectively.

Fig. 7 is a perspective view of the fastening nut structure of the present invention. Fig. 8 is a front view of the fastening nut structure of the present invention. Fig. 9 is a C-C view of Fig. 8 . Fig. 10 is a perspective view of the bottom structure of the compression nut of the present invention. Fig. 11 is a perspective view of the structure of the compression nut according to the present invention. Fig. 12 is a top view of the compression nut structure of the present invention. Fig. 13 is a D-D view of Fig. 12 . Fastening nut 2 comprises hexagonal nut body 21 and cylinder 22, and wherein cylinder 22 is positioned at one end of hexagonal nut body 21, is provided with fastening internal thread 23 inside cylinder 22, is provided with fastening external thread 24 outside cylinder 22; Compression small thread 31 and compression large thread 32 are arranged inside the tightening nut 3; wherein fastening internal thread 23, compression small thread 31 cooperate with the threads on the threaded rod 13 respectively, fastening external thread 24 and compression large thread 32 Cooperate. For this patent, the fastening nut 2 needs to be installed on the threaded rod 13 earlier, and then the compression nut 3 is installed on the threaded rod 13 . After the tightening nut 2 and the compression nut 3 are respectively installed in the threaded rod 13 through the tightening external thread 24 and the compression small thread 31, then through the cooperation of the tightening external thread 24 and the compression large thread 32, the The compression nut 3 is installed on the fastening nut 2 , and the firmness of the compression nut 3 and the fastening nut 2 installed on the threaded rod 13 can be increased through the direct combination of the compression nut 3 and the fastening nut 2 . Because after the compression nut 3 and the tightening nut 2 are combined, to make the compression nut 3 and the tightening nut 2 connect the threaded rod 13 loose, the connection of the compression nut 3 and the threaded rod 13 must be loosened, and the tightening nut 2 and the threaded rod 13 must be loosened simultaneously. The connection of the threaded rod 13, while the rotation of the compression nut 3 and the compression nut 2 in this patent is opposite, the vibration in practice can only lead to the thread loosening in one direction of rotation, so it is impossible to cause the compression nut 3 and the compression nut 2 to loosen at the same time. Loosening of fixed nut 2.

The fastening internal thread 23 and the compression small thread 31 are meshed and connected with the eccentric right-handed thread 131 and the eccentric left-handed thread 132 respectively, and the fastening external thread 24 and the compression large thread 32 are all left-handed threads. Fastening internal thread 23, compressing small thread 31 are respectively engaged with eccentric left-handed thread 132 and eccentric right-handed thread 131, and fastening external thread 24 and compressing large thread 32 are all right-handed threads. To ensure the reliability of the connection in this patent, it is necessary to coordinate the connection between the threaded rod 13 and the clamping nut 2, the connection between the threaded rod 13 and the compression nut 3, and the connection between the clamping nut 2 and the compression nut 3 at the same time. When the fastening nut 2 is installed on the threaded rod 13, only the threaded rod 13 is connected with the fastening nut 2; , because the compression nut 3 will be installed on the compression nut 2 and the threaded rod 13 at the same time. Therefore, the direction of rotation of the compression nut 3 and the tightening nut 2, and the rotation direction of the compression nut 3 and the threaded rod 13 are the same, otherwise, the compression nut 3 cannot cooperate with the tightening nut 2 and the threaded rod 13 at the same time Install. Therefore, when the tightening internal thread 23 is left-handed, in order to ensure that the compression nut 3 and the tightening nut 2 rotate in the opposite direction, the compression small thread 31 must be right-handed, that is, when the compression small thread 31 is rotated clockwise, the compression The small screw thread 31 is tightened downward relative to the threaded rod 13. At this time, it is required to tighten the fastening nut 2 when the small screw thread 31 is required to be pressed clockwise. It is a right hand thread fit. Therefore, when the fastening internal thread 23 and the compression small thread 31 are engaged and connected with the eccentric right-handed thread 131 and the eccentric left-handed thread 132 respectively, the fastening external thread 24 and the large compression thread 32 are all left-handed threads. The fastening internal thread 23 and the small compression thread 31 are meshed and connected with the eccentric left-handed thread 132 and the eccentric right-handed thread 131 respectively, and the fastening external thread 24 and the large compression thread 32 are all right-handed threads.

The cylinder 22 is provided with an open slot 25 , the open slot 25 runs through the front and rear outer walls of the cylinder 22 , and the open slot 25 runs through the top of the cylinder 22 . By setting the opening groove 25 on the cylinder 22, the elasticity of the cylinder 22 can be increased. When the compression nut 3 is installed on the fastening external thread 24, the open cylinder 22 is slightly deformed, so that the fastening inner The thread 23 can hold the threaded rod 13 tightly. An outer chamfer 26 is arranged on the outer circle of the top end of the cylinder 22 , and an inner chamfer 33 is arranged at the junction of the small compression thread 31 and the large compression thread 32 . Wherein, the angle of the outer chamfer 26 is greater than the angle of the inner chamfer 33, so that when the compression nut 3 is screwed into the fastening nut 2, the cylindrical body 22 is deformed through the cooperation of the outer chamfer 26 and the inner chamfer 33 , so as to hold the threaded rod 13 tightly. A convex rounded corner is provided on the outer circle of the top end of the cylinder 22 , and a concave rounded corner is provided at the junction of the small compression thread 31 and the large compression thread 32 . Wherein, the arc radius of the convex rounded corner is smaller than the arc radius of the concave rounded corner, so that when the compression nut 3 is screwed into the fastening nut 2, the cylinder 22 is deformed, thereby tightly hugging the threaded rod 13 . The pitches of the eccentric right-handed thread 131 and the eccentric left-handed thread 132 are equal, and equal to the pitch of the fastening external thread 24 . Because the compression nut 3 cooperates with the tightening nut 2 and the threaded rod 13 respectively, when the compression nut 3 is rotated, the displacement distance of the compression small thread 31 relative to the eccentric right-handed thread 131 or the eccentric left-handed thread 132 is equal to that of the compression large thread 32 relative to the displacement distance of the tightening external thread 24, so as to avoid jamming of the compression nut 3.

The method of using the two-way anti-rotation bolt assembly of this patent, the steps are as follows:

Step 1) first pass the two-way anti-rotation bolt 1 through the first and second fastening parts to be fastened;

Step 2) Then screw the fastening nut 2 into the two-way anti-rotation bolt 1, and leave a gap greater than 1mm between the fastening parts;

Step 3) Then screw the compression nut 3 into the two-way anti-rotation bolt 1, and screw the fastening nut 2 at the same time, when the compression nut 3 can no longer be screwed in relative to the fastening nut 2;

Step 4) Slowly screw in the fastening nut 2, and at the same time reversely rotate the compression nut 3 until the fastening nut 2 is fastened to the part to be fastened, and tighten the compression nut 3.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (9)

1. a kind of two-way derotation bolt assembly, including two-way derotation bolt（1）, fastening nut（2）And clamp nut（3）, fastening Nut（2）And clamp nut（3）All it is mounted on screw rod threadably, it is characterised in that：The two-way derotation Bolt（1）Including polished rod（11）, nut（12）, threaded rod（13）, nut（12）Positioned at polished rod（11）Bottom end, threaded rod（13） Positioned at polished rod（11）Top, threaded rod（13）The eccentric right-handed thread of upper setting（131）With eccentric left hand thread（132）.

2. two-way derotation bolt assembly according to claim 1, it is characterised in that：The fastening nut（2）Including six Angle nut body（21）And cylinder（22）, wherein cylinder（22）Positioned at hex nut body（21）One end, in cylinder（22）It is interior Portion's setting fastening internal thread（23）, in cylinder（22）Outside setting fastening external screw thread（24）；Clamp nut（3）Inside setting pressure Tight minor thread（31）With compression major thread（32）；Wherein fasten internal thread（23）, compress minor thread（31）Respectively and threaded rod （13）On screw-thread fit, fasten external screw thread（24）With compression major thread（32）Cooperation.

3. two-way derotation bolt assembly according to claim 2, it is characterised in that：The fastening internal thread（23）, pressure Tight minor thread（31）Respectively with eccentric right-handed thread（131）, eccentric left hand thread（132）Engagement connection, fastens external screw thread（24） With compression major thread（32）All it is left hand thread.

4. two-way derotation bolt assembly according to claim 2, it is characterised in that：The fastening internal thread（23）, pressure Tight minor thread（31）Respectively with eccentric left hand thread（132）, eccentric right-handed thread（131）Engagement connection, fastens external screw thread（24） With compression major thread（32）All it is right-handed thread.

5. two-way derotation bolt assembly according to claim 3 or 4, it is characterised in that：The cylinder（22）On set Set open slot（25）, open slot（25）Through cylinder（22）Front and back outer wall, while open slot（25）Through cylinder（22） Top.

6. two-way derotation bolt assembly according to claim 5, it is characterised in that：The cylinder（22）Top outside Outer chamfer is set on circle（26）, compressing minor thread（31）With compression major thread（32）Inner chamfer is arranged in junction（33）.

7. two-way derotation bolt assembly according to claim 5, it is characterised in that：The cylinder（22）Top outside Convex rounded corner is set on circle, is compressing minor thread（31）With compression major thread（32）Spill rounded corner is arranged in junction.

8. two-way derotation bolt assembly according to claim 5, it is characterised in that：The eccentric right-handed thread（131） With eccentric left hand thread（132）Screw pitch it is equal, and equal to fastening external screw thread（24）Screw pitch.

9. a kind of application method of two-way derotation bolt assembly any as described in claim 1-9, it is characterised in that：Step is such as Under

Step 1）First by two-way derotation bolt（1）Across the first part to be tightened and the second part to be tightened；

Step 2）Again by fastening nut（2）Screw in two-way derotation bolt（1）And part retention gap to be tightened is more than 1mm；

Step 3）Then by clamp nut（3）Screw in two-way derotation bolt（1）, while screwing in fastening nut（2）, work as clamp nut （3）Tightened relative nut（2）When cannot be further continued for screwing in；

Step 4）Slowly screw in fastening nut（2）, while reversely rotating clamp nut（3）, until arriving fastening nut（2）It is fastened to and waits for On fastener, clamp nut is fastened（3）.