CN210799673U - Anti-loosening screw connection assembly - Google Patents

Abstract

The utility model proposes an anti-loosening screw connection assembly, which comprises a screw with opposite screw threads and a locking screw. The stud end of the screw is provided with a coaxial cylinder, and the cylinder is provided with a coaxial through hole. There are anti-loosening screws in the holes. In the present invention, a through hole is arranged in the screw, and an anti-loosening screw is clamped in the through hole. Since the screw threads of the screw and the anti-loosening screw have opposite directions of rotation, when the screw is loose, the screw moves axially away from the anti-loosening screw. The direction of movement makes the locking screw and the screw clamp closer, thereby preventing the screw and the locking screw from disengaging and preventing loosening.

Description

A locking screw connection assembly

technical field

The utility model relates to the technical field of machinery, in particular to an anti-loosening screw coupling assembly.

Background technique

Screw connection is often used in situations where one of the two connected parts is thick and not suitable for frequent assembly and disassembly. Screw connection is a very common connection method, widely used in construction, mining machinery, agricultural machinery, transportation and equipment manufacturing and other fields. In the working environment with high-strength impact load or high-strength alternating load, screw connection has a long-term problem of anti-loosening. Some of the existing anti-loosening screw connection structures are simple and easy to disassemble, but the anti-loosening effect is poor;

SUMMARY OF THE INVENTION

In view of the above-mentioned technical problems, the present invention proposes an anti-loosening screw coupling assembly, which solves the problems of poor anti-loosening effect or inconvenient disassembly of the prior art anti-loosening screw coupling structure.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

An anti-loosening screw coupling assembly for connecting a first connected member and a second connected member, comprising a screw with opposite screw threads and a locking screw, the stud end of the screw is provided with a coaxial cylinder , the cylinder is provided with a coaxial through hole, and the anti-loosening screw is clamped in the through hole.

Further, the cylinder is provided with an axially extending vertical groove, and the vertical groove radially penetrates the cylinder; the anti-loosening screw includes a coaxially connected threaded column and an optical axis, and the optical axis is provided with There is an annular protrusion that fits with the annular groove; the end face of the optical axis is provided with a fastening part.

Further, the through hole penetrates the screw. It is convenient to use a tool to extend from the nut end of the screw into the through hole to adjust by turning the lock screw at the fastening part.

Further, the radius of the optical axis is not greater than the radius of the through hole.

Further, the edge of the end face of the optical axis is provided with a chamfer.

Further, the cylinder is a square cylinder, and the vertical distance between the corners of the square cylinder and the axis is smaller than the radius of the stud of the screw. So that the cylinder does not affect the screw in and out of the stud of the screw.

Further, there are four vertical grooves, and the four vertical grooves are respectively located on the diagonal lines of the cross section of the square cylinder perpendicular to the axis of the screw.

Further, the fastening portion is a hexagonal head.

The beneficial effects of the utility model are as follows: by clamping the anti-loosening screw in the screw, the annular groove and the annular protrusion are respectively arranged on the screw and the anti-loosening screw, and the screw threads of the screw and the anti-loosening screw have opposite directions of rotation, so that the screw When loosening, the screw moves in the opposite direction to the anti-loosening screw in the axial direction, so that the annular groove and the annular protrusion are more closely fitted, thereby preventing the screw from disengaging from the anti-loosening screw to prevent loosening.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the structural representation of embodiment 1 of the present utility model;

Fig. 2 is the structural schematic diagram of the screw of Embodiment 1 of the present utility model;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is the schematic diagram of the A-A section of Fig. 2;

5 is a schematic structural diagram of the anti-loosening screw according to Embodiment 1 of the present invention;

6 is a schematic structural diagram of a screw according to Embodiment 2 of the present invention;

7 is a schematic structural diagram of the anti-loosening screw according to Embodiment 2 of the present invention;

8 is a schematic structural diagram of Embodiment 3 of the present utility model;

FIG. 9 is a schematic structural diagram of Embodiment 4 of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1 of the present utility model, as shown in FIGS. 1 to 5 , is an anti-loosening screw coupling assembly for connecting a first connected member 1 and a second connected member 2, including screws 3 with opposite screw threads. And the anti-loosening screw 4, a light hole is made on the first connected part 1, and two threaded holes are made on the second connected part 2 that match the threads of the screw 3 and the anti-loosening screw 4 respectively. The stud end of the screw 3 is provided with a cylinder 5 extending along the axial direction of the screw 3 and coaxial with the screw 3 . Since the threads of the screw 3 and the anti-loosening screw 4 have opposite directions of rotation, when the screw 3 is loose, the screw 3 moves away from the anti-loosening screw 4 in the axial direction, so that the anti-loosening screw 4 and the screw 3 are locked more tightly. , so as to prevent the screw 3 from disengaging from the anti-loosening screw 4 to prevent loosening.

Further, as shown in FIG. 1 and FIG. 2 , the inner wall of the through hole 6 is provided with an annular groove 8 coaxial with the through hole 6; The slot 7 penetrates the cylinder 5 radially; the anti-loosening screw 4 includes a threaded post 41 and an optical axis 42 that are coaxially connected. In this embodiment, the screw 3 is a right-hand thread, the thread post 41 is a left-hand thread, and In the embodiment, the screw 3 has a left-hand thread, and the threaded post 41 has a right-hand thread. The optical axis 42 is provided with an annular protrusion 43 that fits with the annular groove 8. When the optical axis 42 extends into the through hole 6, the annular groove 8 and the annular protrusion 43 can fit together to prevent the screw 3 from being damaged. The anti-loosening screw 4 is relatively displaced; the end face of the optical axis 42 is provided with a fastening portion 44, which is convenient for tightening the anti-loosening screw 4 with a tool. When in use, use a tool to screw the anti-loosening screw 3 into the threaded hole corresponding to the threaded column 41 on the second connected member 2 through the fastening portion 44 on the optical axis 42, and screw it into a certain depth, which does not affect the subsequent Screw in 3. Then screw the screw 3 through the light hole on the first connected part 1 and screw it into the threaded hole corresponding to the stud of the screw 3 on the second connected part 2, and connect the first connected part 1 to the second connected part 2. The connection is fastened by the connector 2, and the opening of the vertical groove 7 allows the through hole 6 on the cylinder 5 to be slightly opened so that the optical axis 42 can smoothly extend into the through hole 6. The annular groove 8 and the annular protrusion 43 It can fit together to prevent the relative displacement of the screw 3 and the anti-loosening screw 4 . When the screw 3 is about to loosen, the screw 3 will rotate. At this time, the anti-loosening screw 4 either does not rotate or rotates in the same direction under the drive of the screw 3. Since the screw 3 and the threaded column 41 have opposite directions of rotation, the screw 3 rotates. Therefore, no matter whether the anti-loosening screw 4 does not rotate or rotates, there will inevitably be an axial displacement difference between the screw 3 and the anti-loosening screw 4, resulting in the annular groove 8 The annular protrusion 43 will be more closely inlaid together, so as to limit and hinder the axial displacement between the screw 3 and the anti-loosening screw 4, so as to play a role of anti-loosening. Since the force of rotation when the screw 3 is loose is much smaller than the force of tightening the screw 3 and the anti-loosening screw 3 with a tool, when the screw 3 is loose, the annular groove 8 and the annular protrusion 43 will not be disengaged. When disassembling, first remove the screw 3, and then use a tool to turn the anti-loosening screw 4 through the fastening part 44 until the anti-loosening screw 4 is removed.

Further, as shown in FIG. 1 , the diameter of the threaded post 41 is smaller than the diameter of the threaded post of the screw 3 , so that the anti-loosening screw 4 can enter and exit the light hole of the first connected member 1 . In other embodiments, when the second connected member 2 is thin and the threaded hole of the second connected member 2 can pass through the second connected member 2 , the diameter of the threaded post 41 may be equal to or larger than the stud of the screw 3 The diameter of the anti-loosening screw 4 can be screwed into the threaded hole of the second connected member 2 from the side of the second connected member 2 away from the screw 3 to prevent the screw 3 from loosening. The diameter of the shaft 42 is such that the optical axis 42 will not hinder the entry and exit of the threaded post 41 from the threaded hole on the side of the second connected member 2 away from the first connecting member 1 .

Further, as shown in FIG. 1 and FIG. 2 , the through hole 6 penetrates the screw 3 , so that the nut end of the screw 3 can be easily inserted into the through hole 6 by using a tool to rotate the locking screw 4 through the fastening part to adjust the locking screw. 4, so that the annular protrusion 43 can enter the annular groove 8 accurately.

Further, as shown in FIG. 1 , the radius of the optical axis 42 is not greater than the radius of the through hole 6 , so that the optical axis 42 can extend into the through hole 6 . In other embodiments, the radius of the optical axis 42 may also be slightly larger than the radius of the through hole 6 . Since the vertical slot 7 can be slightly opened, the optical axis 42 can also extend into the through hole 6 .

Further, as shown in FIG. 2 , the edge of the end face of the optical axis 42 is provided with a smooth chamfer, and under the transition effect of the smooth chamfer on the end face of the optical axis 42 , the optical axis 42 can extend into the through hole 6 more smoothly. .

Further, as shown in FIGS. 2 to 4 , the cylinder 5 is a square cylinder, and the vertical distance between the corners of the square cylinder and the axis is less than the radius of the stud of the screw 3, so that the cylinder 5 will not hinder the screw of the screw 3. The column enters and exits in the light hole of the first connected member 1. In this embodiment, the section of the column 5 perpendicular to the axial direction of the screw 3 is a square. In other embodiments, the section of the column 5 perpendicular to the axial direction of the screw 3 is It can be a rectangle, and the cylinder 5 can also be a cylinder. When the cylinder 5 is a cylinder, the diameter of the cylinder is smaller than the diameter of the stud of the screw 3 .

Further, as shown in FIG. 2 to FIG. 4 , four vertical slots 7 are provided, and the four vertical slots 7 are respectively located on the diagonal lines of the cross-section of the square cylinder perpendicular to the axis of the screw 3, so that the column is Under the action of the annular protrusion 43 , the body 5 is subjected to a relatively uniform force, which facilitates opening so that the annular protrusion 43 enters the annular groove 8 . In other embodiments, when the cylinder 5 is a cylinder, the four vertical grooves 7 are evenly distributed along the circumference of the cylinder. In other embodiments, the number of vertical grooves 7 can also be increased according to the situation. Preferably, the axial length of the vertical slot 7 is smaller than the axial length of the column body 5 so that the column body 5 is not easily damaged.

Further, as shown in FIG. 5 , the fastening portion 44 is a hexagonal head, which is convenient to use a hexagonal tool to fasten the anti-loosening screw 4 . Preferably, the diagonals of the six corners of the hexagonal head are all smaller than the diameter of the optical axis 42, and are at least 2 mm smaller, so that the hexagonal head can not only extend into the through hole 6, but also extend into the hexagonal tool from the through hole 6 through the hexagonal head Tighten the head to the anti-loosening screw 4. In other embodiments, the fastening portion 44 may be a straight groove or a cross groove.

In the second embodiment of the present invention, as shown in FIGS. 6 and 7 , on the basis of the first embodiment, the end of the through hole 6 in the cylinder 5 near the lock nut 4 is provided with an end face opposite to the optical axis 42 . The corners are matched with the chamfer, and the cylinder 5 projects radially inwardly from the boss at the position of the annular groove 8 close to the edge of the side edge of the locking screw 4, and the corresponding position of the optical axis 42 is provided with a groove, the groove Matching with the above-mentioned boss, when the optical axis 42 extends into the through hole 6 and the annular groove 8 is stuck with the annular protrusion 43, the above-mentioned boss is stuck in the groove, further preventing the annular groove 8 from being connected to the annular protrusion. 43 to disengage.

The third embodiment of the present invention, as shown in FIG. 8 , differs from the first embodiment in that an optical axis 9 is arranged on the screw 3 , a cylinder 10 is arranged on the anti-loosening screw 4 , and a coaxial shaft is arranged in the cylinder 10 The inner wall of the through hole is provided with an annular groove coaxial with the through hole; the column body 10 is provided with an axially extending vertical groove, and the vertical groove radially penetrates the column body; There is an annular protrusion that fits with the annular groove. When in use, screw the anti-loosening screw 4 into the second connected piece through the vertical slot into the vertical slot, then pass the screw 3 through the light hole of the first connected piece and screw it into the second connected piece, while the light The annular protrusion on the shaft 9 is clamped into the annular groove on the cylinder 10 to prevent loosening.

Embodiment 4 of the present invention, as shown in FIG. 9 , differs from Embodiment 1 in that the above-mentioned annular groove is a spherical groove, and the annular protrusion is a spherical protrusion.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the scope of protection of the present invention.

Claims (8)

1. The anti-loosening screw connecting assembly is used for connecting a first connected piece (1) with a second connected piece (2), and is characterized by comprising a screw (3) and an anti-loosening screw (4) with opposite screw thread turning directions, wherein a coaxial cylinder (5) is arranged at the stud end of the screw (3), a coaxial through hole (6) is formed in the cylinder (5), and the anti-loosening screw (4) is clamped in the through hole (6).

2. Anti-loose screw coupling assembly according to claim 1, characterized in that the inner wall of the through hole (6) is provided with an annular groove (8) coaxial with the through hole (6); the column body (5) is provided with an axially extending vertical groove (7), and the vertical groove (7) radially penetrates through the column body (5); the anti-loosening screw (4) comprises a threaded column (41) and an optical axis (42) which are coaxially connected, and an annular bulge (43) matched with the annular groove (8) is arranged on the optical axis (42); a fastening section (44) is provided on the end face of the optical axis (42).

3. Anti-loose screw coupling assembly according to claim 1 or 2, characterized in that the through hole (6) passes through the screw (3).

4. Anti-loose screw coupling assembly according to claim 2, characterized in that the radius of the optical axis (42) is not greater than the radius of the through hole (6).

5. Anti-loose screw coupling assembly according to claim 4, characterized in that the edge of the end face of the optical axis (42) is provided with a chamfer.

6. Anti-loose screw coupling assembly according to claim 1 or 2 or 4 or 5, characterized in that the cylinder (5) is a square cylinder with the corners perpendicular to the axis at a distance smaller than the radius of the stud of the screw (3).

7. Anti-loose screw coupling assembly according to claim 2 or 4 or 5, characterized in that there are four vertical slots (7), four vertical slots (7) being respectively located on the diagonals of a section of a square cylinder perpendicular to the axis of the screw (3).

8. Anti-loose screw coupling assembly according to claim 7, characterized in that the fastening portion (44) is a hexagonal head.

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