CN114589653A

CN114589653A - Anti-loosening screw and detachable screwdriver

Info

Publication number: CN114589653A
Application number: CN202011390868.9A
Authority: CN
Inventors: 刘青山; 陈士弘
Original assignee: Maintek Computer Suzhou Co Ltd; Pegatron Corp
Current assignee: Maintek Computer Suzhou Co Ltd; Pegatron Corp
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2022-06-07
Anticipated expiration: 2040-12-02
Also published as: CN114589653B

Abstract

The invention provides a locking screw and a detachable screwdriver. The anti-loosening screw is used for being locked into an object to be locked, and the object to be locked is provided with an internal thread. The anti-loosening screw comprises a screw main body, a pair of self-locking rolling shafts and a plurality of springs. The screw body has external threads and a pair of openings. The self-locking roller is arranged in the screw body and is exposed by the opening. The spring is connected between the self-locking rolling shaft and the screw main body, and when the anti-loosening screw is locked into the object to be locked, the self-locking rolling shaft protrudes out of the external thread of the screw main body and abuts against the internal thread of the object to be locked. The anti-loosening screw can be well locked with an object to be locked and cannot be loosened. And the anti-loosening screw can be disassembled by using a special disassembling screwdriver under the condition of not damaging an object to be locked.

Description

Anti-loosening screw and detachable screwdriver

Technical Field

The invention relates to a screw, in particular to a locking screw and a disassembling screwdriver.

Background

The use of screws for locking is well known in many industries. When the object locked by the screw is a stationary object, the problem of loosening of the screw is avoided. However, if the screw is used on machines or vehicles that are operated from time to time, loosening of the screw can pose a potential hazard.

Generally, the main cause of nut loosening is vibration. The long-time vibration causes the nut to obtain the power of rotation, or the vibration friction between the screw and the object causes the nut to rotate minutely. After a long time operation, the screw is easy to loosen or fall off due to loosening.

Traditional check screw probably reaches the effect that prevents the pine and take off and drop through adding the spiral shell thread glue, adding lock washer or adding modes such as locking decorative pattern. However, such a locking screw does not have a self-locking function.

In addition, the traditional anti-loosening screw can be disassembled by using a common screwdriver or a spanner, and a hand tool for disassembling is easy to obtain, so that the anti-loosening screw is easy to disassemble. In addition, the removal of the locking screw may damage the surface of the locked article or generate debris remaining inside the article during the removal process.

Disclosure of Invention

The invention aims at a novel anti-loosening screw and a disassembling screwdriver, so as to improve the defects in the prior art.

The anti-loosening screw is used for being locked into an object to be locked, and the object to be locked is provided with an internal thread. The anti-loosening screw comprises a screw main body, a pair of self-locking rolling shafts and a plurality of springs. The screw body has external threads and a pair of openings. The self-locking roller is arranged in the screw body and is exposed by the opening. The spring is connected between the self-locking rolling shaft and the screw main body, wherein when the anti-loosening screw is locked into an object to be locked, the self-locking rolling shaft protrudes out of the external thread of the screw main body and abuts against the internal thread of the object to be locked.

In the check screw according to the embodiment of the present invention, the axial direction of the self-locking roller is parallel to the axial direction of the screw main body.

In the check screw according to the embodiment of the present invention, the expansion and contraction direction of the spring is perpendicular to the axial direction of the self-locking roller.

The disassembling screwdriver is used for disassembling the anti-loose screw. The detachable screwdriver comprises a screwdriver body, a pair of rotating shafts, a pair of push claws and a pair of torsion springs. The screwdriver body has a neck. The pivot setting is in the neck. The push claw is rotatably sleeved on the rotating shaft. The torsion spring is connected between the push pawl and the rotating shaft.

According to the dismounting screwdriver disclosed by the embodiment of the invention, the screw main body is provided with the hollow groove, the hollow groove is communicated with the opening, when the self-locking rolling shaft protrudes out of the screw main body and is positioned at the locking position, the screwdriver body enters the hollow groove in the state that the push claw is folded, the push claw is opened after the push claw is positioned at the opening, the dismounting screwdriver is rotated, the push claw pushes the self-locking rolling shaft from the self-locking position to the unlocking position, and the self-locking rolling shaft is retracted in the screw main body.

Therefore, the invention provides the anti-loosening screw with a novel structure, and the anti-loosening screw can be well locked with an object to be locked and is not easy to loosen. In addition, the special disassembling screwdriver provided by the invention can be used for disassembling the anti-loose screw without damaging the object to be locked.

Drawings

FIG. 1 is a schematic view of a screw assembly;

FIG. 2A is a schematic view of the screwdriver being disassembled;

FIG. 2B is a partial schematic view of FIG. 2A;

FIG. 3 is a schematic view of a locking screw being locked into an object to be locked;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view of the disassembly using the disassembly screwdriver described above;

fig. 6 is a schematic view of the screwdriver being disassembled after the front end of the screwdriver enters the anti-loosening screw.

Description of the reference numerals

1: screw assembly

2: anti-loosening screw

21: screw body

21 a: external thread

21 b: hollow groove

21 c: opening holes

22: self-locking roller

23: spring

3: disassembling screwdriver

31: screwdriver body

31 a: neck part

32: rotating shaft

33: push claw

34: torsion spring

4: article

5: object to be locked

51: internal thread

A1, A2: axial direction

P1: locked position

P2: unlocking position

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Fig. 1 is a schematic view of a screw assembly. Fig. 2A is a schematic view of a disassembled screwdriver, and fig. 2B is a partial schematic view of fig. 2A. Please refer to fig. 1, fig. 2A and fig. 2B simultaneously. The screw assembly 1 comprises a locking screw 2 and a removal screwdriver 3. The locking screw 2 includes a screw body 21, a self-locking roller 22, and a spring 23.

The screw body 21 has an external thread 21a, a hollow groove 21b and an opening 21c, and the hollow groove 21b communicates with the opening 21 c.

The self-locking roller 22 is disposed in the screw body 21 and exposed by the opening 21 c. The axial direction a1 of the self-locking roller 22 of the present embodiment is parallel to the axial direction a2 of the screw body 21. In addition, the number of the self-locking rollers 22 provided in the present embodiment is a pair, and the number of the openings 21c corresponds to the number of the self-locking rollers 22. The self-locking rollers 22 are disposed on opposite sides of the screw body 21 in a radial direction of the screw body 21, but not limited thereto. The number of the self-locking rollers 22 can be increased according to the requirement, and the arrangement position of the self-locking rollers 22 can be changed according to the number of the self-locking rollers 22.

The spring 23 is connected between the self-locking roller 22 and the screw body 21, wherein the extension and retraction direction of the spring 23 is perpendicular to the axial direction a1 of the self-locking roller 22. Specifically, the spring 23 extends and contracts in one of the radial directions of the self-locking roller 22.

A spring 23 is attached to the end of each self-locking roller 22. The spring 23 is used for applying a force to the self-locking roller 22, so that the self-locking roller 22 can protrude out of the external thread 21a of the screw body 21, and therefore, after the anti-loosening screw 2 is locked on the object 5 to be locked (shown in fig. 3), the self-locking roller 22 will abut against the internal thread 51 of the object 5 to be locked, thereby increasing the locking adhesion between the anti-loosening screw 2 and the object 5 to be locked.

The dismounting screwdriver 3 comprises a screwdriver body 31, a rotating shaft 32, a pushing claw 33 and a torsion spring 34.

The screwdriver body 31 has a neck portion 31a, and the rotation shaft 32 is provided at the neck portion 31 a. The number of the rotation shafts 32 provided in the present embodiment is two, and the rotation shafts 32 are provided on opposite sides of the neck portion 31a in the radial direction of the driver body 31.

The number of the push claws 33 is the same as that of the rotating shaft 32, wherein the push claws 33 are rotatably sleeved on the rotating shaft 32, and the push claws 33 can rotate relative to the rotating shaft 32 to retract into the screwdriver body 31 or protrude out of the screwdriver body 31.

The torsion spring 34 is connected between the pushing claw 33 and the rotating shaft 32 to provide a torsion force to the pushing claw 33, so that the pushing claw 33 is rotated out of the screwdriver body 31.

Fig. 3 is a schematic view of locking a locking screw into an object to be locked. FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3. Please refer to fig. 2A, fig. 3 and fig. 4. The locking screw 2 of the present embodiment is inserted through the object 4 and then locked into the object 5 to be locked. Specifically, the object to be locked 5 has an internal thread 51. After the anti-loosening screw 2 passes through the object 4, it is locked into the object 5 to be locked by the engagement of the external thread 21a of the screw body 21 with the internal thread 51 of the object 5 to be locked.

After the anti-loosening screw 2 is locked into the object 5 to be locked, the spring 23 applies force to the self-locking roller 22 along the radial direction, so as to push the self-locking roller 22 out of the opening 21c, so that the self-locking roller 22 protrudes out of the external thread 21a of the screw body 21 and abuts against the internal thread 51 of the object 5 to be locked. At this time, the self-locking roller 22 is in the locked position.

The spring 23 is used for applying force to the self-locking roller 22, so that the self-locking roller 22 protrudes out of the external thread 21a of the screw body 21 and abuts against the internal thread 51 of the object 5 to be locked, thereby increasing the locking fastening degree between the anti-loosening screw 2 and the object 5 to be locked. In addition, since the extending and contracting direction of the spring 23 is perpendicular to the axial direction a1 of the self-locking roller 22, even if a long-time shock occurs, the spring 23 can continuously apply a force to the self-locking roller 22 along the radial direction of the self-locking roller 22 through the deformation capability of the spring 23, so that the self-locking roller 22 abuts against the internal thread 51 of the object 5 to be locked, and the anti-loosening screw 2 is prevented from falling off from the object 5 to be locked.

Incidentally, the locking screw 2 of the present embodiment cannot be detached by a common hand tool (e.g., a common screwdriver), because the current screwdriver on the market does not have a structure capable of unlocking the self-locking roller 22. Therefore, the lock screw 2 can be prevented from being unintentionally detached.

Fig. 5 is a schematic view of the disassembly using the disassembly screwdriver. Fig. 6 is a schematic view of the screwdriver being disassembled after the front end of the screwdriver enters the anti-loosening screw.

Referring to fig. 5 and 6, when the anti-loosening screw 2 is to be removed from the object 5 to be locked, a special removal screwdriver 3 is required. Specifically, the end of the screwdriver body 31 of the screwdriver 3 provided with the rotating shaft 32, the pushing claw 33 and the torsion spring 34 extends into the hollow groove 21 b. The pushing claw 33 enters the hollow groove 21b in a retracted state (i.e., the pushing claw 33 is screwed into the neck portion 31a and does not protrude out of the neck portion 31 a).

When the pushing claw 33 is positioned at the opening hole 21c, the pushing claw 33 is opened by the elastic restoring force provided by the torsion spring 34 because the wall of the hollow groove 21b does not restrain the pushing claw 33.

Then, the detaching screwdriver 3 is rotated, the opened pushing claw 33 contacts and pushes the self-locking roller 22, the self-locking roller 22 is pushed away from the internal thread 51 of the object to be locked 5 from the self-locking position P1 to the unlocking position P2, the self-locking roller 22 is retracted into the screw body 21, and the self-locking roller 22 no longer abuts against the internal thread 51 of the object to be locked 5. Thus, the locking screw 2 can be detached from the object 5 to be locked.

Since the self-locking roller 22 does not contact the object 5 to be locked when the locking screw 2 is detached from the object 5 to be locked, the detaching screwdriver 3 of the present embodiment can detach the locking screw 2 without damaging the object 5 to be locked.

In summary, the embodiments of the present invention provide a lock screw with a novel structure, which uses a mechanical principle to achieve the effect of tightly locking with an object to be locked without loosening, and does not need to use additional screws or lock washers.

In addition, in view of the anti-loose screw according to the embodiment of the present invention, a special disassembling screwdriver is further provided in the embodiment of the present invention, which has a novel and special structure through the arrangement of the rotating shaft, the pushing claw and the torsion spring, and the anti-loose screw can be disassembled from the object to be locked by opening the pushing claw without damaging the object to be locked. In addition, if the special disassembling screwdriver is not used, the anti-loosening screw cannot be disassembled under the condition of not damaging the structure of the object to be locked.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A check screw for locking into an object to be locked, the object to be locked having an internal thread, the check screw comprising:

a screw body having an external thread and a pair of openings;

a pair of self-locking rollers disposed within the screw body and exposed by the pair of openings; and

a plurality of springs connected between the pair of self-locking rollers and the screw body,

when the anti-loosening screw is locked into the object to be locked, the pair of self-locking rollers protrude out of the external thread of the screw main body and abut against the internal thread of the object to be locked.

2. The anti-loosening screw according to claim 1, wherein an axial direction of the pair of self-locking rollers is parallel to an axial direction of the screw main body.

3. The anti-loosening screw according to claim 1, wherein the expansion and contraction directions of the plurality of springs are perpendicular to the axial direction of the pair of self-locking rollers.

4. A removal screwdriver for removing a locking screw as claimed in claim 1, wherein said removal screwdriver comprises:

a screwdriver body having a neck;

a pair of rotating shafts arranged at the neck part;

the pair of push claws is rotatably sleeved on the rotating shaft; and

and the pair of torsion springs are connected between the pair of push claws and the pair of rotating shafts.

5. The screwdriver as claimed in claim 4, wherein the screwdriver body has a hollow slot, the hollow slot is in communication with the pair of openings, when the pair of self-locking rollers protrudes out of the screwdriver body and is located at the locking position, the screwdriver body enters the hollow slot in a state that the pair of push claws are folded, and the pair of push claws are located at the pair of openings, the pair of push claws are opened, the screwdriver is rotated, the pair of push claws push the pair of self-locking rollers from the locking position to the unlocking position, and the pair of self-locking rollers are retracted into the screwdriver body.