CN210799673U

CN210799673U - Anti-loosening screw connection assembly

Info

Publication number: CN210799673U
Application number: CN201921898858.9U
Authority: CN
Inventors: 路明; 陈琳
Original assignee: Zhongyuan University of Technology
Current assignee: Zhongyuan University of Technology
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-06-19
Anticipated expiration: 2029-11-06

Abstract

The utility model provides a locking screw hookup subassembly, including screw thread soon to opposite screw and locking screw, the double-screw bolt of screw is served and is equipped with coaxial cylinder, is equipped with coaxial through-hole in the cylinder, and the through-hole inside callipers is equipped with locking screw. The utility model discloses a set up the through-hole in the screw to block in the through-hole and set up the loose screw of defence, because the screw is opposite to the spiral of screw and check screw's screw thread, when the screw is not hard up, the screw is towards the direction motion of keeping away from check screw in the axial, make check screw and with the screw card inseparabler, thereby prevent that screw and check screw from breaking away from playing locking effect.

Description

Anti-loosening screw connection assembly

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a locking screw hookup subassembly.

Background

Screw couplings are often used where one of the two coupled couplings is thick and is not easily removable. Screw connection is a very common connection mode and is widely applied to the fields of buildings, mining machinery, agricultural machinery, traffic, equipment manufacturing and the like. In working environments with high impact loads or high alternating loads, screw connections have a long-standing problem of loosening prevention. The existing anti-loosening screw connecting structure has some anti-loosening structures which are simple and convenient to disassemble, but the anti-loosening effect is not good; some locking effect is good, but the structure is complicated dismantles inconveniently, even can not used repeatedly.

Disclosure of Invention

To foretell technical problem, the utility model provides a locking screw hookup subassembly solves the locking effect of prior art's locking screw hookup structure not good or dismantle inconvenient problem.

In order to achieve the above purpose, the technical solution of the present invention is realized as follows:

a locking screw connection assembly is used for connecting a first connected piece and a second connected piece and comprises a screw and a locking screw, wherein the screw and the locking screw are opposite in thread turning direction, a coaxial cylinder is arranged on a stud end of the screw, a coaxial through hole is formed in the cylinder, and the locking screw is clamped in the through hole.

Furthermore, the column body is provided with an axially extending vertical groove which radially penetrates through the column body; the anti-loosening screw comprises a threaded column and an optical axis which are coaxially connected, and an annular bulge matched with the annular groove is arranged on the optical axis; the end face of the optical axis is provided with a fastening part.

Further, the through hole penetrates through the screw. The nut end of the screw can be conveniently stretched into the through hole by using a tool, and the locking screw is rotated through the fastening part for adjustment.

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 square cylinder, and the perpendicular distance of the edges and corners of the square cylinder from the axis is less than the radius of the stud of the screw. So that the column does not affect the screwing-in and screwing-out of the stud of the screw.

Furthermore, four vertical grooves are formed in the square column and are respectively located on the diagonal line of the cross section, perpendicular to the axis of the screw, of the square column.

Further, the fastening portion is a hexagonal head.

The utility model has the advantages that: the anti-loosening screw is clamped in the screw, the annular groove and the annular bulge are arranged on the screw and the anti-loosening screw respectively and are matched, and the screwing directions of the threads of the screw and the anti-loosening screw are opposite, so that when the screw is loosened, the screw moves towards the direction opposite to the anti-loosening screw in the axial direction, the annular groove and the annular bulge are attached more tightly, and the screw is prevented from being separated from the anti-loosening screw to play a role in preventing loosening.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a screw according to embodiment 1 of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of section A-A of FIG. 2;

fig. 5 is a schematic structural view of a locking screw according to embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a screw according to embodiment 2 of the present invention;

fig. 7 is a schematic structural view of a locking screw according to embodiment 2 of the present invention;

fig. 8 is a schematic structural view of embodiment 3 of the present invention;

fig. 9 is a schematic structural view of embodiment 4 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

Embodiment 1 of the utility model, as shown in fig. 1~ 5, a locking screw hookup subassembly for connect first by connecting piece 1 and second by connecting piece 2, including screw thread revolve to opposite screw 3 and locking screw 4, first by being done a unthreaded hole on connecting piece 1, be done on the second by connecting piece 2 respectively with screw 3 and locking screw 4's two screw holes of screw thread assorted, screw 3's double-screw bolt is served and is equipped with along screw 3's axial extension and with the coaxial cylinder 5 of screw 3, is equipped with coaxial through-hole 6 in the cylinder 5, and the card sets up locking screw 4 in the through-hole 6. Because the screw threads of the screw 3 and the anti-loosening screw 4 are opposite in screwing direction, when the screw 3 loosens, the screw 3 moves in the direction away from the anti-loosening screw 4 in the axial direction, so that the anti-loosening screw 4 is clamped with the screw 3 more tightly, and the screw 3 is prevented from being separated from the anti-loosening screw 4 to play a role in preventing loosening.

Further, as shown in fig. 1 and 2, an annular groove 8 coaxial with the through hole 6 is provided on the inner wall of 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, in the embodiment, a right-handed thread is arranged on the screw 3, a left-handed thread is arranged on the threaded column 41, in other embodiments, a left-handed thread is arranged on the screw 3, and a right-handed thread is arranged on the threaded column 41. The optical axis 42 is provided with an annular bulge 43 which is matched with the annular groove 8, and after the optical axis 42 extends into the through hole 6, the annular groove 8 and the annular bulge 43 can be attached to prevent the relative displacement of the screw 3 and the anti-loosening screw 4; a fastening portion 44 is provided on an end surface of the optical axis 42, and facilitates the loosening of the lock screw 4 with a tool. When the anti-loosening screw 3 is used, the anti-loosening screw 3 is screwed into the threaded hole corresponding to the threaded column 41 in the second connected piece 2 through the fastening part 44 on the optical axis 42 by a tool, and the screwing is performed to a certain depth, so that the screwing of the subsequent screw 3 is not influenced. Then the screw 3 is screwed into the threaded hole corresponding to the stud of the screw 3 on the second connected piece 2 after passing through the unthreaded hole on the first connected piece 1, the first connected piece 1 and the second connected piece 2 are fastened and connected, meanwhile, the opening of the vertical groove 7 enables the through hole 6 on the column body 5 to be slightly opened, so that the optical axis 42 can smoothly extend into the through hole 6, and the annular groove 8 and the annular bulge 43 can be attached to prevent the relative displacement of the screw 3 and the anti-loosening screw 4. When the screw 3 wants to become flexible, the screw 3 will rotate, at this moment, the locking screw 4 will not rotate or rotate in the same direction under the drive of the screw 3, because the screw 3 is opposite to the screwing direction of the threaded column 41, the screw 3 will rotate more tightly in the direction away from the locking screw 4, therefore, no matter the locking screw 4 does not rotate or rotate, the axial displacement difference is inevitably generated between the screw 3 and the locking screw 4, the annular groove 8 and the annular bulge 43 can be more closely inlaid together, the axial displacement between the screw 3 and the locking screw 4 is limited and blocked, and the locking effect is achieved. Because the rotating force when the screw 3 is loosened is far less than the force for fastening the screw 3 and the anti-loosening screw 3 by using a tool, the annular groove 8 and the annular bulge 43 cannot be separated when the screw 3 is loosened. In disassembling, the screw 3 is first removed, and then the locking screw 4 is rotated by a tool through the fastening portion 44 until the locking screw 4 is removed.

Further, as shown in fig. 1, the diameter of the threaded column 41 is smaller than that of the stud of the screw 3, so that the locking screw 4 can enter and exit from the unthreaded hole of the first connected member 1. In other embodiments, when the second connected component 2 is thin and the threaded hole of the second connected component 2 can penetrate through the second connected component 2, the diameter of the threaded column 41 may be equal to or larger than the diameter of the stud of the screw 3, and the anti-loosening screw 4 may be screwed into the threaded hole of the second connected component 2 from the side of the second connected component 2 away from the screw 3 to loosen the screw 3, at this time, the diameter of the threaded column 41 is larger than the diameter of the optical axis 42, so that the optical axis 42 does not obstruct the threaded column 41 from entering and exiting from the threaded hole of the side of the second connected component 2 away from the first connected component 1.

Further, as shown in fig. 1 and 2, the through hole 6 penetrates the screw 3, so that the through hole 6 can be conveniently extended into the through hole 6 from the nut end of the screw 3 by using a tool, and the locking screw 4 is adjusted by rotating the locking screw 4 through the fastening part, so that the annular protrusion 43 can accurately enter the annular groove 8.

Further, as shown in fig. 1, the radius of the optical axis 42 is not larger 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 be slightly larger than the radius of the through hole 6, and the optical axis 42 may also extend into the through hole 6 because the vertical groove 7 can be slightly opened.

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 action of the smooth chamfer of the end face of the optical axis 42, the optical axis 42 can more smoothly extend into the through hole 6.

Further, as shown in fig. 2 to 4, the cylinder 5 is a square cylinder, and a perpendicular distance between an edge of the square cylinder and an axis is smaller than a radius of the stud of the screw 3, so that the cylinder 5 does not obstruct the stud of the screw 3 from entering and exiting the unthreaded hole of the first connected component 1, in this embodiment, a cross section of the cylinder 5 perpendicular to an axial direction of the screw 3 is square, in other embodiments, a cross section of the cylinder 5 perpendicular to the axial direction of the screw 3 may be rectangular, the cylinder 5 may also be a cylinder, and when the cylinder 5 is a cylinder, a diameter of the cylinder is smaller than a diameter of the stud of the screw 3.

Furthermore, as shown in fig. 2 to 4, four vertical grooves 7 are provided, and the four vertical grooves 7 are respectively located on the diagonal of the cross section of the square cylinder perpendicular to the axis of the screw 3, so that the cylinder 5 is stressed more uniformly under the action of the annular protrusion 43 and is conveniently opened to enable the annular protrusion 43 to enter the annular groove 8. In other embodiments, when the column 5 is a cylinder, four vertical slots 7 are uniformly distributed along the circumference of the cylinder. In other embodiments, the number of vertical slots 7 may be increased as appropriate. Preferably, the axial length of the vertical slot 7 is smaller than the axial length of the column 5, so that the column 5 is not easily damaged.

Further, as shown in fig. 5, the fastening portion 44 is a hexagonal head, which facilitates fastening of the lock screw 4 using a hexagonal tool. Preferably, the diagonals of the six corners of the hex head are each smaller than the diameter of the optical axis 42 and are at least 2mm smaller, so that the hex head can not only extend into the through-hole 6, but also extend from the through-hole 6 into a hex tool to tighten the locking screw 4 via the hex head. In other embodiments, the fastening portion 44 may be a straight slot or a cross slot.

The utility model discloses an embodiment 2, as shown in fig. 6 and 7, on embodiment 1's basis, the tip that through-hole 6 is close to locknut 4 one side in the cylinder 5 is equipped with the chamfer with optical axis 42 terminal surface chamfer matched with, and cylinder 5 radially inwards stretches out the boss in the position of the edge of annular groove 8's the edge of being close to lockscrew 4 one side, optical axis 42's relevant position is equipped with the recess, this recess and above-mentioned boss phase-match, when optical axis 42 stretches into in the through-hole 6 and annular groove 8 blocks mutually with annular bulge 43, above-mentioned boss card is gone into in the recess, further prevent that annular groove 8 and annular bulge 43 from breaking away.

Embodiment 3 of the present invention, as shown in fig. 8, is different from embodiment 1 in that an optical axis 9 is provided on a screw 3, a cylinder 10 is provided on a lock screw 4, a coaxial through hole is provided in the cylinder 10, and an annular groove coaxial with the through hole is provided on an inner wall of the through hole; the column body 10 is provided with an axially extending vertical groove which radially penetrates through the column body; the optical axis 9 is provided with an annular protrusion matched with the annular groove. When the anti-loosening device is used, the vertical groove is clamped into the vertical groove to screw the anti-loosening screw 4 into the second connected piece, then the screw 3 penetrates through the unthreaded hole of the first connected piece and then is screwed into the second connected piece, and meanwhile, the annular bulge on the optical axis 9 is clamped into the annular groove on the cylinder 10 to play a role in preventing loosening.

Embodiment 4 of the present invention, as shown in fig. 9, is different from embodiment 1 in that the annular groove is a spherical groove, and the annular protrusion is a spherical protrusion.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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.