CN108361267A - A kind of included clamping head stop nut - Google Patents

Abstract

A locknut with a clamping head provided by the present invention includes a nut body and a clamping head, the nut body is provided with a base and a fastening part integrally connected to the base, and the clamping head can move axially The fastening part is sleeved on the nut body, the fastening part is provided with at least one seam, so that the fastening part has radial elasticity, the clamping head is provided with a conical cavity, and the conical cavity is suitable for Matched with the fastening part, the fastening part can be tightened gradually. Therefore, the nut body can be clamped quickly through the built-in clamping head, which enhances the reliability and tightness of the connection, prevents the connection from loosening, and ensures the safety of the equipment.

Description

A kind of anti-loosening nut with clamping head

technical field

The invention relates to the technical field of fasteners, in particular to a locknut with a clamping head.

Background technique

There are many kinds of threaded fasteners, including bolts, studs, screws and nuts. Although the volume of threaded fasteners in the entire equipment is not large, once there are problems in design, manufacture, application, and assembly, it may cause machine failure. A major fatal accident. When threaded fasteners are applied to high-strength equipment such as fans and rails, due to long-term vibration, it is easy to cause the fasteners to loosen and affect the stability of the equipment. In order to prevent the loosening of bolts, nuts and other fasteners, it is often added Auxiliary gaskets and spring washers are used to eliminate the axial gap between the standard nut and the stud thread. The radial gap is difficult to eliminate. With the prolongation of use time, there may be a gap between the thread between the nut and the bolt, and the relative Slip, resulting in unreliable equipment connection, affecting the use of the equipment and reducing the service life.

On the other hand, auxiliary products such as auxiliary gaskets and auxiliary nuts require multi-step assembly operations, and do not need to be assembled twice, which increases processing time, low assembly efficiency, and high production costs, which is not conducive to improving market competitiveness.

Contents of the invention

The main purpose of the present invention is to provide a self-contained clamping head locknut, which overcomes the deficiencies of the prior art, and can quickly clamp the nut body through the self-contained clamping head, enhance the reliability and tightness of the connection, and prevent The connection is loose to ensure the safety of the device.

Another object of the present invention is to provide a self-contained clamping head locknut, which has a compact structure. Through the cooperation of the elastic nut body and the clamping head, the threaded connection of the nut body can be radially strengthened to prevent the threaded fit after being loaded. There is a gap between them and relative slippage.

Another object of the present invention is to provide a self-contained clamping head locknut, which is easy to install and operate, and the self-contained clamping head improves assembly efficiency, realizes fast integrated installation, reduces costs, and improves market competitiveness.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a locknut with its own clamping head includes a nut body and a clamping head, the nut body is provided with a base and a fastening part integrally connected to the base, The clamping head is axially movably sleeved on the fastening portion of the nut body, and the fastening portion is provided with at least one seam, so that the fastening portion has radial elasticity, and the clamping head is provided with There is a tapered cavity adapted to the fastening part so as to gradually tighten the fastening part.

According to an embodiment of the present invention, the clamping head is further provided with an upper opening and a lower opening, the upper opening and the lower opening communicate with the tapered cavity up and down respectively, and the inner diameter of the lower opening is adapted to the The outer diameter of the fastening part is such that the lower side of the clamping head is sleeved on the fastening part, and the inner diameter of the upper opening is smaller than the outer diameter of the fastening part.

According to an embodiment of the present invention, the inner diameter of the tapered cavity gradually decreases from the lower opening to the upper opening, and when the clamping head moves along the fastening portion toward the base, The outer diameter of the fastening portion is gradually reduced.

According to an embodiment of the present invention, the clamping head is further provided with a cone wall, the cone wall extends obliquely inwardly from the lower opening to the upper opening, and the cone wall is provided with a thread structure.

According to an embodiment of the present invention, the fastening part is provided with an internal thread and an external thread, the internal thread is provided on the inner wall of the nut body, the external thread is formed on the external wall of the fastening part, the The external thread is adapted to the thread structure of the cone wall.

According to an embodiment of the present invention, the clamping head is further provided with chamfers, the chamfers are respectively provided on the upper and lower surfaces of the clamping head, and the chamfers are 10-20°.

According to an embodiment of the present invention, the inclination of the cone wall is 1-15°.

Preferably, the inclination of the cone wall is 4-5°.

According to an embodiment of the present invention, there are four seams in the fastening part, and the width of the seams is 1-3 mm.

According to an embodiment of the present invention, the ratio of the seam width to the outer diameter of the fastening part is 1-3:27.

According to an embodiment of the present invention, the width of the seam is 1.6mm, and the height of the fastening part is consistent with the height of the clamping head.

Description of drawings

Fig. 1 is a perspective view of a locknut according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the locknut according to the above preferred embodiment of the present invention.

Fig. 3A is a perspective view of the clamping head according to the above-described preferred embodiment of the present invention.

Fig. 3B is a perspective view of the nut body according to the above preferred embodiment of the present invention.

Fig. 4A is a top view of the clamping head according to the above-described preferred embodiment of the present invention.

4B is a cross-sectional view of the clamping head of FIG. 4A according to the present invention.

Detailed ways

The following description serves to disclose the present invention to enable those skilled in the art to carry out the present invention. The preferred embodiments described below are only examples, and those skilled in the art can devise other obvious variations.

As shown in Figures 1 to 4B is a locknut 1 with a clamping head. The locknut 1 with a clamping head includes a nut body 10 and a clamping head 20. The nut body 10 is provided with The base 11 and the fastening part 12 integrally connected to the base 11, the clamping head 20 is axially movably sleeved on the fastening part 12 of the nut body 10, the fastening part 12 is provided with at least A slit 123 makes the fastening part 12 have radial elasticity, and the clamping head 20 is provided with a conical cavity 200, and the conical cavity 200 is adapted to the fastening part 12, so that the fastening part 12 can be gradually tightened. Solid part 12. In this way, the nut body 10 can be quickly clamped through the built-in clamping head 20, which enhances the reliability and tightness of the connection, prevents the connection from loosening, and ensures the safety of the equipment.

Wherein, the clamping head 20 is further provided with an upper opening 21, a lower opening 22 and a cone wall 23, and the upper opening 21 and the lower opening 22 communicate with the cone cavity 200 up and down respectively, and the cone wall 23 is connected with the cone cavity 200 from the bottom The lower opening 22 extends obliquely inwardly toward the upper opening 21, and the inner diameter of the lower opening 22 is adapted to the outer diameter of the fastening portion 12, so that the lower side of the clamping head 20 is sleeved on the For the fastening part 12 , the inner diameter of the upper opening 21 is smaller than the outer diameter of the fastening part 12 , and the outer diameter of the fastening part 12 is gradually reduced by external tightening force.

That is to say, the inner diameter of the conical chamber 200 gradually decreases from the lower opening 22 to the upper opening 21, when the clamping head 20 moves along the fastening portion 12 toward the base 11 , the outer diameter of the fastening portion 12 can be gradually reduced, and the fastening portion 12 can be gradually tightened.

The cone wall 23 is provided with a thread structure, the fastening part 12 is provided with an internal thread 121 and an external thread 122, the internal thread 121 is arranged on the inner wall of the nut body 10, and the internal thread 121 is adapted to a standard connection The external thread 122 is formed on the outer wall of the fastening part 12, and the external thread 122 is adapted to the thread of the tapered wall 23, so that the tapered wall 23 is screwed to the fastening part 12 The external thread 122 is convenient for the clamping head 20 to move inward gradually to clamp the fastening part 12 .

The clamping head 20 is further provided with chamfers 24, the chamfers 24 are respectively arranged on the upper and lower surfaces of the clamping head 20, the chamfers 24 are easy to cooperate with rotating tools such as wrenches, and the chamfers 24 are 10-20°, preferably, the chamfer 24 is 15°.

Wherein, the inclination of the cone wall 23 is 1 to 15°, and the inclination of the cone wall 23 depends on the size of the product. The larger the size of the nut body 10 and the clamping head 20, the greater the inclination. Relatively increasing, the contact surface of the nut body 10 and the moment wall increase, the distance that can be generated increases, and the inclination of the cone wall 23 can increase accordingly. If the inclination is too small, that is, too straight, it will cause the resulting The inner diameters of the lower opening 22 and the upper opening 21 are relatively close, and it is difficult to clamp the fastening part 12. If the inclination is too large, that is, too much inclination will cause the inner diameter of the lower opening 22 to be too large. The clamping head 20 is difficult to be screwed to the fastening portion 12 and difficult to assemble.

Preferably, the inclination of the cone wall 23 is 4-5°. When the upper opening 21 gradually moves toward the fastening portion 12 , the fastening portion 12 is gradually tightened, and the inward inclination formed by the fastening portion 12 is consistent with the tapered wall 23 .

Wherein, the seam 123 of the fastening part 12 is a cross groove or an eight-character groove, and the number of slots of the seam 123 is determined according to the size of the product. The larger the size of the fastening part 12, the greater the fastening part. The more seams 123 of 12, the wider the width of the seams 123, so that the fastening part 12 can generate radial elastic force, which is convenient for radial expansion and contraction.

Preferably, there are four seams 123 in the fastening part 12, the width of the seams 123 is 1-3 mm, and the ratio of the width of the seams 123 to the outer diameter of the fastening part 12 is 1-3 :27, the larger the size of the nut body 10, the larger the ratio of the width of the seam 123 to the outer diameter of the fastening portion 12.

Preferably, the seam 123 has a width of 1.6 mm.

Wherein, the height of the fastening part 12 and the height of the clamping head 20 can be consistent or not, and the height can be adjusted according to the needs of the product.

In use, the clamping head 20 is threadedly connected to the fastening portion 12, and the nut body 10 with the clamping head 20 is threadedly connected to an external connector through an internal thread 121, such as tightening the base 11 by a wrench , rotate the base 11 so that the self-contained clamping head locknut 1 is assembled on the external connector, and then tighten the clamping head 20 inwardly so that the clamping head 20 moves axially inward, The fastening part 12 can be gradually tightened radially inward, which not only improves the assembly efficiency, but only needs to be installed in one piece before tightening, which reduces the cost, and also produces radial preload on the nut body 10 through the clamping head 20 force, enhance the reliability and tightness of the connection, and prevent the gap between the nut body 10 and the external connecting member from sliding relative to each other after being loaded. When taking out the anti-loosening nut 1, it is only necessary to unscrew the clamping head 20 to release the fastening part 12. loose nut1.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description are only the principles of the present invention. Variations and improvements, which fall within the scope of the claimed invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. a kind of included clamping head stop nut, which is characterized in that including nut body and clamping head, the nut body is set There is pedestal and be integrally connected to the fastening part of the pedestal, the clamping head is axially displaceably socketed on the nut body Fastening part, the fastening part are equipped with an at least linear slit so that there is radial elastic, the clamping head to be equipped with cone for the fastening part Chamber, the cone chamber adapt to the fastening part, are able to gradually tighten the fastening part.

2. included clamping head stop nut according to claim 1, which is characterized in that the clamping head is further provided with Opening and under shed, the upper opening are connected to the cone chamber up and down respectively with the under shed, and the internal diameter of the under shed is suitable Outer diameter assigned in the fastening part so that the fastening part is socketed on the downside of the clamping head, the internal diameter of the upper opening is small Outer diameter in the fastening part.

3. included clamping head stop nut according to claim 2, which is characterized in that the cone chamber from the under shed to The internal diameter of the upper opening direction is gradually reduced, when the clamping head is moved along the fastening part to the pedestal direction, It obtains so that the outer diameter of the fastening part is gradually reduced.

4. included clamping head stop nut according to claim 3, which is characterized in that the clamping head is further provided with cone Wall, the cone wall is obliquely inwardly extending from the under shed to the upper opening, and the cone wall is equipped with helicitic texture.

5. included clamping head stop nut according to claim 4, which is characterized in that the fastening part be equipped with internal thread and External screw thread, the internal thread are set to the inner wall of the nut body, and the external screw thread is formed in the outer wall of the fastening part, institute State the helicitic texture that external screw thread adapts to the cone wall.

6. included clamping head stop nut according to claim 5, which is characterized in that it is described cone wall gradient be 1~ 15°。

7. included clamping head stop nut according to claim 6, which is characterized in that it is described cone wall gradient be 4~ 5°。

8. included clamping head stop nut according to claim 7, which is characterized in that the clamping head is further provided with down Angle, the chamfering are respectively arranged at the upper and lower surface of the clamping head, and the chamfering is 10~20 °.

9. included clamping head stop nut according to claim 8, which is characterized in that the linear slit of the fastening part is four A, the width of the linear slit is 1~3mm.

10. according to any included clamping head stop nut in claim 1~9, which is characterized in that the linear slit width Ratio with the fastening outside diameter is 1~3:27, the width of the linear slit is 1.6mm, the height of the fastening part with it is described The height of clamping head is consistent.