Detachable self-locking nut assembly

Abstract

The invention discloses a detachable self-locking type nut assembly, belongs to the technical field of nut assemblies, and solves the problems that in the prior art, installation is inconvenient, self-locking cannot be achieved, and disengagement is prone to happening. The detachable self-locking type nut assembly comprises a threaded sleeve, a nut is connected into the threaded sleeve, the threaded sleeve comprises a threaded sleeve body, and transverse plates are oppositely arranged at the two ends of the upper portion of the threaded sleeve body in the inner diameter direction; first balls are embedded in the surface of the transverse plate, limiting columns are fixedly arranged at the bottom of the transverse plate, and the nuts comprise the upper nut and the lower nut which are vertically connected in a sleeved mode. According to the nut assembly, the thread sleeve and the nut are separately arranged, continuity of threads in the nut assembly is guaranteed, installation of the nut assembly is facilitated, the transverse plate and the limiting column are arranged in the thread sleeve body, the nut is prevented from moving after being tightly connected, the tightness and looseness prevention performance of installation and connection of the nut assembly are improved, and through limiting of the small balls, the nut assembly is prevented from moving. Downward pressure is formed on the upper nut, and self-locking is formed.

Description

Technical Field

[0001] The present invention belongs to the technical field of nut assemblies, and in particular, relates to a detachable self-locking nut assembly. Background Art

[0002] Nut locking is a commonly used mechanical connection method in the prior art, but the reliability of this self-locking will be reduced under dynamic loads. In some important occasions, some anti-loosening measures are usually taken to ensure the reliability of nut locking. Fasteners have a wide range of applications. Many fasteners are in heavy-load and vibrating working environments, and they are prone to loosening. Once fasteners in certain parts become loose, they are likely to cause serious accidents or even endanger lives. There are usually two main devices to enhance the locking effect: one is to fix the object with the main nut and the auxiliary nut. During operation, the main nut is first screwed into place, and then the auxiliary nut is screwed in for tightening, so as to achieve the purpose of fixing; the other is to first put in a spring washer during operation, and then condense the nut to lock it, which can also achieve a better tightening effect. However, these methods are difficult to grasp the locking force, the operation is cumbersome, and the time is long, which is easy to affect the connection quality and use effect. Moreover, during installation and subsequent use, looseness will still occur, causing damage to the nut itself, and it is difficult to disassemble later, and the practicality is poor. Summary of the invention

[0003] The purpose of the present invention is to provide a detachable self-locking nut assembly which is easy to install, self-locking and not easy to fall off, in view of the deficiencies in the prior art.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the detachable self-locking nut assembly of the present invention is: A detachable self-locking nut assembly, comprising a screw sleeve, a nut connected inside the screw sleeve, the screw sleeve comprising a screw sleeve body, a transverse plate is arranged at both ends of the upper part of the screw sleeve body along the inner diameter direction, a first ball is embedded on the surface of the transverse plate, and a limiting column is fixedly arranged at the bottom, the upper part of the limiting column narrows toward the middle part, the middle part expands toward the lower part, and the overall cross-section is in the shape of a waist drum; The nut comprises an upper nut and a lower nut which are sleeved together from top to bottom, the outer surface of the upper nut is provided with an external thread matching the internal thread of the screw sleeve body, a rectangular insertion port is provided at the bottom of the upper nut, a rectangular groove whose inner diameter is larger than the diameter of the insertion port is provided at the top of the insertion port, and two ends of the bottom of the upper nut are inclined to the insertion port and extend into a wedge shape, the lower nut comprises an integrally formed movable body, a positioning body and a limiting body, the movable body is inserted into the rectangular groove, grooves are provided on both sides of its upper part, small balls are embedded in the grooves, the lower part of the movable body is connected to the positioning body after narrowing, the upper part of the positioning body is connected to the bottom of the movable body after narrowing upward, the lower part is disc-shaped, and the two ends of the bottom are fitted with the lower part of the screw sleeve body after tilting downward, a limiting body is inserted in the middle of the bottom of the positioning body, supporting ears are provided on both sides of the outer side of the limiting body, a gap is left between the supporting ears and the bottom of the positioning body, and a second ball is filled in the gap, the radius of the second ball is larger than the curvature of the waist of the limiting column, and the length from the inclined end to the bottom of the supporting ear of the lower part of the positioning body is consistent with the length of the inclined section of the lower part of the screw sleeve body.

[0005] Preferably, the screw sleeve body comprises an integrally formed nut and a rod body, and the rod body comprises a straight column section and a tapered section connected end to end.

[0006] Preferably, the inner diameter of the top end of the tapered section is consistent with the inner diameter of the straight column section, and the inner diameter of the lower end of the tapered section is narrowed.

[0007] Preferably, the cross-section of the movable body is cylindrical, the cross-section of the positioning body is in the shape of a rectangle, and the cross-section of the limiting body is cylindrical.

[0008] Preferably, the first ball is located between the upper nut and the movable body, and the inner diameter of the first ball is larger than the curvature of the arc formed at the connection between the movable body and the positioning body.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The present invention ensures the continuity of the internal threads of the nut assembly by separately arranging the screw sleeve and the nut, thereby facilitating the installation of the nut assembly; a transverse plate and a limiting column are arranged in the screw sleeve body to prevent the nut from moving after being tightly connected, thereby improving the tightness and anti-loosening properties of the installation connection of the nut assembly; through the cooperation of the first ball, the second ball and the small ball, even if the nut assembly moves in a harsh environment, the small ball can be limited to form a downward pressure on the upper nut to form a self-locking, thereby avoiding the problem of the nut and the screw sleeve body being separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure after the nut moves in the present invention.

[0011] In the figure: 1. Screw sleeve body; 2. Horizontal plate; 3. First ball; 4. Limiting column; 5. Upper nut; 6. Lower nut; 7. Insertion port; 8. Rectangular groove; 9. Groove; 10. Small ball; 11. Support ear; 12. Second ball; 601. Movable body; 602. Positioning body; 603. Limiting body. DETAILED DESCRIPTION

[0012] The invention is further described below in conjunction with the accompanying drawings and specific embodiments: like Figure 1-2 As shown, a detachable self-locking nut assembly includes a screw sleeve, a nut is connected inside the screw sleeve, and the screw sleeve includes a screw sleeve body 1. The upper part of the screw sleeve body 1 is provided with transverse plates 2 at both ends along the inner diameter direction, and the surface of the transverse plate 2 is embedded with a first ball 3. A limiting column 4 is fixedly provided at the bottom. The upper part of the limiting column 4 is narrowed toward the middle part, and the middle part is enlarged toward the lower part, and the overall cross-section is in the shape of a waist drum; The nut comprises an upper nut 5 and a lower nut 6 which are sleeved together. The outer surface of the upper nut 5 is provided with an external thread matching the internal thread of the screw sleeve body 1. A rectangular insertion port 7 is provided at the bottom of the upper nut 5. A rectangular groove 8 with an inner diameter larger than the diameter of the insertion port 7 is provided at the top of the insertion port 7. Both ends of the bottom of the upper nut 5 extend obliquely toward the insertion port 7 to form a wedge shape. The lower nut 6 comprises an integrally formed movable body 601, a positioning body 602 and a limiting body 603. The movable body 601 has a cylindrical cross section, the positioning body 602 has a spherical cross section, and the limiting body has a cylindrical cross section. The movable body 601 is inserted into the rectangular groove 8, and grooves 9 are provided on both sides of its upper part. The groove 9 is embedded with Small ball 10, the lower part of the movable body 601 is narrowed and connected to the positioning body 602, the upper part of the positioning body 602 is narrowed upward and connected to the bottom of the movable body 601, the lower part is disc-shaped, and the two ends of the bottom are tilted downward and fit with the lower part of the screw sleeve body 1, and a limiting body 603 is inserted in the middle of the bottom of the positioning body 602, and supporting ears 11 are provided on both sides of the outer side of the limiting body 603. A gap is left between the supporting ears 11 and the bottom of the positioning body 602, and the gap is filled with a second ball 12. The radius of the second ball 12 is larger than the waist curvature of the limiting column 4, and the length of the lower part of the positioning body 602 from the inclined end to the bottom of the supporting ear 11 is consistent with the length of the inclined section of the lower part of the screw sleeve body 1.

[0013] The screw sleeve body 1 includes an integrally formed nut and a rod body, the rod body includes a straight column section and a tapered section connected end to end, the inner diameter of the top end of the tapered section is consistent with the inner diameter of the straight column section, and the inner diameter of the lower end of the tapered section is narrowed. The lower part of the screw sleeve body 1 is set to a cone shape, so that when the upper nut and the screw sleeve body are displaced, the second ball has a movable space, thereby preventing the upper nut from further displacement.

[0014] The first ball 3 is located between the upper nut 5 and the movable body 601, and the inner diameter of the first ball 3 is larger than the arc formed at the connection between the movable body 601 and the positioning body 602. By setting the inner diameter of the first ball 3, it is ensured that the first ball 3 can effectively stop the lower nut 6.

[0015] When the present invention is working, the screw sleeve body is placed at the part to be reinforced, and then the first ball is placed in the groove on the surface of the horizontal plate, and the second ball is inserted into the gap between the positioning body and the supporting ear. Then the nut is inserted into the screw sleeve body, and the nut is rotated so that the first ball is inserted between the upper nut and the movable body. The upper nut is continuously tightened, and the wedge-shaped end at the bottom of the upper nut pushes the first ball to move toward the axis of the screw sleeve body. The first ball is inserted into the arc transition at the connection between the movable body and the positioning body, and at the same time, the top of the lower nut contacts the bottom of the rectangular groove. When the nut assembly is in a strong vibration environment, the upper nut and the screw sleeve When the body is offset, the bottom of the upper nut loses control of the first ball, and the first ball moves from the arc transition to the horizontal plate, and the second ball slides from the supporting ear into the waist of the limiting column, forming a limit for the bottom of the lower nut. At the same time, the top of the lower nut gradually moves away from the inner wall of the rectangular groove until the small ball is stuck on the inner side of the insertion port, exerting downward pressure on the upper nut, thereby preventing the upper nut from further separating from the screw sleeve body, thereby achieving the anti-slip and anti-loosening effects. The present invention realizes the self-locking and anti-loosening and anti-slipping functions of the nut assembly through the cooperation of the first ball, the second ball and the small ball.

[0016] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications in the shape, structure, characteristics and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A detachable self-locking nut assembly, comprising a screw sleeve, a nut is connected inside the screw sleeve, and the screw sleeve comprises a screw sleeve body, characterized in that: The upper part of the screw sleeve body is provided with transverse plates at both ends along the inner diameter direction, the surface of the transverse plate is embedded with a first ball, and a limiting column is fixedly provided at the bottom, the upper part of the limiting column narrows toward the middle part, and the middle part expands toward the lower part, and the overall cross-section is in the shape of a waist drum; The nut comprises an upper nut and a lower nut which are sleeved together from top to bottom, the outer surface of the upper nut is provided with an external thread matching the internal thread of the screw sleeve body, a rectangular insertion port is provided at the bottom of the upper nut, a rectangular groove whose inner diameter is larger than the diameter of the insertion port is provided at the top of the insertion port, and two ends of the bottom of the upper nut are inclined to the insertion port and extend into a wedge shape, the lower nut comprises an integrally formed movable body, a positioning body and a limiting body, the movable body is inserted into the rectangular groove, grooves are provided on both sides of its upper part, small balls are embedded in the grooves, the lower part of the movable body is connected to the positioning body after narrowing, the upper part of the positioning body is connected to the bottom of the movable body after narrowing upward, the lower part is disc-shaped, and the two ends of the bottom are fitted with the lower part of the screw sleeve body after tilting downward, a limiting body is inserted in the middle of the bottom of the positioning body, supporting ears are provided on both sides of the outer side of the limiting body, a gap is left between the supporting ears and the bottom of the positioning body, and a second ball is filled in the gap, the radius of the second ball is larger than the curvature of the waist of the limiting column, and the length from the inclined end to the bottom of the supporting ear of the lower part of the positioning body is consistent with the length of the inclined section of the lower part of the screw sleeve body.

2. The detachable self-locking nut assembly according to claim 1, characterized in that: The screw sleeve body comprises an integrally formed nut and a rod body, and the rod body comprises a straight column section and a tapered section connected end to end.

3. The detachable self-locking nut assembly according to claim 2, characterized in that: The inner diameter of the top end of the tapered section is consistent with the inner diameter of the straight column section, and the inner diameter of the lower end of the tapered section is narrowed.

4. The detachable self-locking nut assembly according to claim 1, characterized in that: The cross section of the movable body is cylindrical, the cross section of the positioning body is in the shape of a square, and the cross section of the limiting body is cylindrical.

5. The detachable self-locking nut assembly according to claim 1, characterized in that: The first ball is located between the upper nut and the movable body, and the inner diameter of the first ball is greater than the curvature of the arc formed at the connection between the movable body and the positioning body.

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