Squeezing screw locking device

Abstract

The utility model discloses an extrusion screw locking device which comprises a bolt, a convex nut and a concave nut, the convex nut and the concave nut are both in threaded connection with the outer side of the bolt, an inclined hole is formed in the surface of the concave nut, the inclined hole is communicated with a middle hole of the concave nut, and the interior of the inclined hole is in threaded connection with a first extrusion screw. One end of the first extrusion screw makes contact with the outer surface of the bolt, two symmetrically-formed through holes are formed in the outer surface of the concave nut, two symmetrically-formed connecting holes are formed in the outer surface of the convex nut, the through holes communicate with the adjacent connecting holes when the concave nut and the convex nut are locked, and springs are arranged in the connecting holes. According to the utility model, the original straight hole is changed into the inclined hole, after the concave nut is screwed down, the first extrusion screw is screwed down, and the first extrusion screw moves towards the rotation direction of the concave nut, so that an acting force is applied to the screwed concave nut, and a better locking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of set screws, in particular to a set screw locking device. Background Art

[0002] Set screws are widely used in various machines and equipment, such as automobiles, aerospace, electronic equipment, construction engineering, etc. Their main function is to connect and fix parts to ensure the stable operation of machines and equipment.

[0003] At present, normal set screws are all drilled vertically, using the friction or yield force between the set screw and the bolt to achieve the anti-loosening effect. In this structure, the tightness of the nut is not affected by the set screw and maintains its original state. Therefore, under vibration, if the nut becomes loose, it will cause the set screw to move, and the anti-loosening effect cannot be achieved. Utility Model Content

[0004] The purpose of the present invention is to provide a locking device for a set screw to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a set screw locking device, comprising a bolt, a convex nut and a concave nut, wherein the convex nut and the concave nut are both threadedly connected to the outside of the bolt, an inclined hole is provided on the surface of the concave nut, the inclined hole is connected to the middle hole of the concave nut, and the internal thread of the inclined hole is connected to a first set screw, and one end of the first set screw is in contact with the outer surface of the bolt.

[0006] As a further preferred embodiment of the present technical solution, the outer surface of the female nut is provided with two symmetrically arranged through holes, and the outer surface of the male nut is provided with two symmetrically arranged connecting holes.

[0007] As a further preferred embodiment of the present technical solution, when the female nut and the male nut are locked, the through holes are connected to adjacent connecting holes.

[0008] As a further preferred embodiment of the present technical solution, a spring is provided inside the connecting hole, and the other end of the spring is provided inside a neighboring through hole.

[0009] As a further preferred embodiment of the present technical solution, the internal thread of the through hole is connected with a second set screw, one end of the second set screw is threadedly connected to the interior of the connecting hole, and the second set screw is arranged on the inner side of the spring.

[0010] As a further preferred embodiment of the present technical solution, one end of each of the first fixing screw and the second fixing screw is provided with a slot.

[0011] The utility model provides a screw locking device, which has the following beneficial effects:

[0012] (1) The utility model changes the original straight hole into an oblique hole. When the female nut is tightened, the first set screw is tightened. The first set screw moves in the rotation direction of the female nut, thereby adding a force to the tightened female nut, thereby achieving a better locking effect.

[0013] (2) The utility model locks the concave nut and the convex nut by setting the second fixing screw, so that the concave nut is not easy to loosen from the convex nut, thereby improving the overall locking effect of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the concave nut structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the convex nut structure of the present utility model.

[0017] In the figure: 1. Bolt; 2. Concave nut; 3. Convex nut; 4. Oblique hole; 5. Through hole; 6. First set screw; 7. Second set screw; 8. Connecting hole; 9. Spring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] The utility model provides a technical solution: Figure 1 and Figure 2 As shown, in this embodiment, a set screw locking device includes a bolt 1, a convex nut 3 and a concave nut 2. The convex nut 3 and the concave nut 2 are both threadedly connected to the outer side of the bolt 1, and an inclined hole 4 is provided on the surface of the concave nut 2. The inclined hole 4 is connected to the middle hole of the concave nut 2, and the internal thread of the inclined hole 4 is connected to the first set screw 6. One end of the first set screw 6 contacts the outer surface of the bolt 1, and the convex nut 3 and the concave nut 2 are screwed on the outer side of the bolt 1 in turn. One end of the convex nut 3 will be stuck in the inner side of one end of the concave nut 2, and the edge position of the middle hole of the convex nut 3 will be slightly misaligned. Therefore, under the action of eccentric force, the convex nut 3 and the concave nut 2 will be locked. After the two are locked, the first set screw 6 is screwed into the inclined hole 4, one end of which will rest against the outer surface of the bolt 1, and the whole will move in the rotation direction of the concave nut 2, applying force to the concave nut 2 to improve the locking effect.

[0020] Two symmetrically arranged through holes 5 are formed on the outer surface of the female nut 2 , and the inner threads of the through holes 5 are connected to second fixing screws 7 .

[0021] One end of the first set screw 6 and the second set screw 7 is provided with a slotted slot, and the slotted slot allows the user to tighten the first set screw 6 and the second set screw 7 with a slotted screwdriver.

[0022] like Figure 2 and Figure 3 As shown, two symmetrically arranged connecting holes 8 are provided on the outer surface of the convex nut 3 , and when the concave nut 2 and the convex nut 3 are locked, the through hole 5 is connected to the adjacent connecting holes 8 .

[0023] A spring 9 is disposed inside the connecting hole 8 , and the other end of the spring 9 is disposed inside the adjacent through hole 5 .

[0024] One end of the second set screw 7 is threadedly connected to the inside of the connecting hole 8, and the second set screw 7 is arranged on the inner side of the spring 9. After the female nut 2 and the convex nut 3 are connected and locked, the through hole 5 and the adjacent connecting hole 8 will be connected. The spring 9 is inserted into the inside of the connecting hole 8 through the through hole 5, and then the second set screw 7 is screwed into the connecting hole 8 through the through hole 5. One end of the second set screw 7 is located in the connecting hole 8, and the other end is located in the through hole 5 to lock the female nut 2 and the convex nut 3. Secondly, the end of the second set screw 7 located in the connecting hole 8 will squeeze the spring 9, and the spring 9 will exert a force on the second set screw 7, so that the second set screw 7 is not easy to loosen.

[0025] The utility model provides a set screw locking device, the specific working principle is as follows: when installing, the convex nut 3 and the concave nut 2 are screwed on the outside of the bolt 1 in sequence, and one end of the convex nut 3 is stuck in the inner side of one end of the concave nut 2, wherein the edge position of the center hole of the convex nut 3 is slightly misaligned, so under the action of eccentric force, the convex nut 3 and the concave nut 2 are locked. After the two are locked, the first set screw 6 is screwed into the inclined hole 4, and one end of the set screw 6 is against the outer surface of the bolt 1, and the whole will rotate toward the concave nut 2. Move in the direction to apply force to the female nut 2 to improve the locking effect, then insert the spring 9 into the interior of the connecting hole 8 through the through hole 5, and then screw the second set screw 7 into the connecting hole 8 through the through hole 5. One end of the second set screw 7 is located in the connecting hole 8, and the other end is located in the through hole 5 to lock the female nut 2 and the convex nut 3. Secondly, the end of the second set screw 7 located in the connecting hole 8 will squeeze the spring 9, and the spring 9 will apply force to the second set screw 7, so that the second set screw 7 is not easy to loosen.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A set screw locking device, comprising a bolt (1), a convex nut (3) and a concave nut (2), characterized in that: The convex nut (3) and the concave nut (2) are both threadedly connected to the outer side of the bolt (1); an inclined hole (4) is provided on the surface of the concave nut (2); the inclined hole (4) is connected to the middle hole of the concave nut (2); and the inner thread of the inclined hole (4) is connected to a first set screw (6); one end of the first set screw (6) is in contact with the outer surface of the bolt (1).

2. A set screw locking device according to claim 1, characterized in that: The outer surface of the female nut (2) is provided with two symmetrically arranged through holes (5), and the outer surface of the male nut (3) is provided with two symmetrically arranged connecting holes (8).

3. A set screw locking device according to claim 2, characterized in that: When the female nut (2) and the male nut (3) are locked, the through hole (5) is connected to a nearby connecting hole (8).

4. The set screw locking device according to claim 2, characterized in that: A spring (9) is arranged inside the connecting hole (8), and the other end of the spring (9) is arranged inside the adjacent through hole (5).

5. The set screw locking device according to claim 4, characterized in that: The internal thread of the through hole (5) is connected to a second fixing screw (7), one end of the second fixing screw (7) is threadedly connected to the inside of the connecting hole (8), and the second fixing screw (7) is arranged on the inner side of the spring (9).

6. A set screw locking device according to claim 5, characterized in that: One end of each of the first fixing screw (6) and the second fixing screw (7) is provided with a slot.

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