Spinning locking type screw

Abstract

The utility model relates to the technical field of screws, in particular to a self-rotating locking type screw. The self-rotating locking type screw comprises a screw rod, an integrally-formed rod cap is fixedly embedded in the screw rod, and a cross-shaped groove is formed in the upper surface of the rod cap. An elastic telescopic sleeve is installed on the lower surface of the rod cap, a plurality of annularly-distributed conical seats are fixedly embedded in a sleeve opening, away from the rod cap, of the elastic telescopic sleeve, and a plastic piece is fixedly installed between every two adjacent conical seats. According to the self-rotating locking type screw, the screw rod is completely covered with the stretchable elastic telescopic sleeve, external friction and pollution are effectively isolated in the transportation and storage stages, thread abrasion is avoided, and smooth installation is guaranteed; the V-shaped breaking groove guides the plastic piece to break directionally, the conical base is forced to retract inwards and be embedded into the screw hole, radial damping is formed, the self-locking effect is achieved, and the anti-vibration and anti-loosening capacity is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw technical field especially relates to a self-rotating locking type screw. BACKGROUND

[0002] In the field of household goods and general fasteners, as a basic connecting element, the stability and anti-loosening performance of the screw directly affect the safety in use. The traditional screw generally has the following problems:

[0003] 1. Insufficient anti-loosening performance: conventional screws are prone to loosening or even falling off under vibration or long-term load, especially in scenarios such as wooden furniture that need to be frequently moved or vibrated, which can lead to connection failure and safety hazards.

[0004] 2. Thread damage: during transportation or storage, the threads of the screw may be damaged due to friction or impact, resulting in poor cooperation with the screw hole during installation, or even unable to be normally screwed in.

[0005] 3. Lack of protective structure: the thread part of the existing screw is usually directly exposed to the outside, lacking a protective device, and is easily eroded by the environment (such as moisture and dust), further exacerbating performance degradation.

[0006] In view of the above problems, although there are some improvement schemes (such as double-nut anti-loosening, spring washer, etc.) in the prior art, there are defects such as complex structure, high cost, or poor compatibility.

[0007] Therefore, it is necessary to provide a new self-rotating locking type screw to solve the above technical problems. SUMMARY

[0008] To solve the above technical problems, the utility model provides a self-rotating locking type screw.

[0009] The self-rotating locking type screw provided by the utility model comprises a screw rod, an integrally formed rod cap is fixedly embedded on the screw rod, and a cross groove is formed on the upper surface of the rod cap;

[0010] The lower surface of the rod cap is fixedly installed with an elastic telescopic sleeve for covering the screw rod, a plurality of annularly distributed conical seats are fixedly embedded on the sleeve opening away from the rod cap of the elastic telescopic sleeve, plastic sheets are fixedly installed between adjacent conical seats, and the conical seats and the plastic sheets are arranged in a spaced manner and constitute a circular structure.

[0011] Preferably, the plurality of conical seats are fixed to each other by the plastic sheets and constitute an inverted circular table structure, and the diameter of the circular table structure decreases from top to bottom.

[0012] Preferably, the inner wall of the circular structure is provided with an internal thread structure.

[0013] Preferably, the internal thread structure is provided with a threaded blocking stud, and the blocking stud abuts the head end of the screw rod.

[0014] Preferably, the outer arc surface of the plastic sheet away from the shaft is provided with a V-shaped breaking groove.

[0015] Preferably, the lower surface of the rod cap is fixedly provided with a rubber ring, and the rubber ring is located outside the elastic telescopic sleeve connecting end.

[0016] Compared with the related art, the self-rotation locking screw has the following beneficial effects:

[0017] The elastic telescopic sleeve completely covers the screw rod, effectively isolates external friction and pollution during transportation and storage, avoids thread wear, and ensures smooth installation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic diagram of a preferred embodiment of the self-rotation locking screw provided by the present application;

[0019] Figure 2 Fig. 2 is another structural schematic diagram of a preferred embodiment of the self-rotation locking screw provided by the present application;

[0020] Figure 3 Fig. 3 is an exploded structural schematic diagram of the self-rotation locking screw provided by the present application; Figure 2 Fig. 4 is a partial enlarged structural schematic diagram of the elastic telescopic sleeve and the conical seat thereof;

[0021] Figure 4 Fig. 5 is a partial enlarged structural schematic diagram of the elastic telescopic sleeve and the conical seat thereof; Figure 1

[0022] Fig. 1, the screw rod; 11, the rod cap; 2, the elastic telescopic sleeve; 3, the conical seat; 4, the butt plastic sheet; 4a, the V-shaped breaking groove; 5, the internal thread structure; 6, the blocking stud; 7, the rubber ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0024] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0025] Please refer to​Figures 1 to 4 The utility model discloses a kind of self-locked screws, the self-locked screw includes screw rod 1, elastic telescopic sleeve 2 and conical seat 3.

[0026] In the embodiment of the utility model, please refer to Figures 1 to 4 The screw rod 1 is fixedly embedded with integrally-formed rod cap 11, and the upper surface of the rod cap 11 is provided with a cross groove, and the lower surface of the rod cap 11 is fixedly installed with an elastic telescopic sleeve 2 for covering the screw rod 1, and a plurality of annularly distributed conical seats 3 are fixedly embedded on the sleeve opening of the elastic telescopic sleeve 2 away from the rod cap 11, and plastic sheets 4 are fixedly installed between adjacent conical seats 3, the outer arc surface of the plastic sheet 4 away from the shaft is provided with a V-shaped breaking groove 4a, the conical seat 3 and the plastic sheet 4 are arranged at intervals and form a circular structure, and the inner wall of the circular structure is provided with an internal thread structure 5, a threaded connection plug stud 6 is inserted into the internal thread structure 5, and the plug stud 6 abuts against the nail head end of the screw rod 1

[0027] The plurality of conical seats 3 are fixed to each other by the plastic sheet 4 and form an inverted circular table structure, and the diameter of the circular table structure decreases from top to bottom.

[0028] It should be noted that before the screw is used, the elastic telescopic sleeve 2 is stretched to cover the screw rod 1, and then the plug stud 6 is inserted into the circular structure and threadedly connected with the internal thread structure 5 to abut against the rod head of the screw rod 1, so that the screw rod 1 is stably located in the elastic telescopic sleeve 2, thereby the elastic telescopic sleeve 2 can effectively protect the screw rod 1, and the threads on the screw rod 1 are prevented from being difficult to be threadedly assembled with the screw hole due to wear.

[0029] When the screw is used, after the plug stud 6 is unscrewed, the elastic telescopic sleeve 2 is compressed to make the screw rod 1 slide out of the circular table structure, and then the screw rod 1 is inserted into the screw hole for threadedly rotating in, as the screw rod 1 rotates in along the screw hole, the elastic telescopic sleeve 2 is further compressed, when the circular table structure is located between the rod cap 11 and the screw hole, since the diameter of the circular table structure decreases from top to bottom, the tapered heads of the conical seats 3 are inserted into the opening of the screw hole, as the rod cap 11 is continuously pressed, at this time, the plastic sheet 4 in the circular table structure formed by the conical seats 3 is continuously abutted against the opening of the screw hole due to the pressing force of the rod cap 11, when the pressing force reaches a certain degree, the V-shaped breaking groove 4a guides the plastic sheet 4 to break directionally, so that the inner diameter of the annularly distributed conical seats 3 is further reduced, forcing the conical seats 3 to shrink and embed into the screw hole, until the conical seats 3 partially press into the screw hole, forming radial damping to the screw rod 1, realizing the self-locking effect of the screw rod 1, avoiding the screw rod 1 from slipping out of the screw hole due to reverse rotation caused by vibration in later period, and significantly improving the anti-vibration loosening capability.

[0030] In the scheme, when the elastic sleeve 2 is compressed between the screw hole surface and the rod cap 11, the elastic sleeve 2 is of an elastic structure, and thus functions as a buffer washer.

[0031] In the embodiment, the V-shaped breaking groove 4a formed in the plastic sheet 4 enables the plastic sheet 4 to break quickly under a certain pressure.

[0032] Further, the lower surface of the rod cap 11 is fixedly provided with a rubber ring 7, and the rubber ring 7 is located outside the connecting end of the elastic sleeve 2.

[0033] It is worth noting that, by cooperation of the internal thread structure 5 and the plugging stud 6, the screw rod 1 can be stably fixed in the non-use stage, and in use, the plugging stud 6 only needs to be unscrewed and the elastic sleeve 2 is compressed to quickly release the screw rod, thereby simplifying the operation process, and the rubber ring 7 located outside the elastic sleeve 2 further absorbs the vibration energy in the installation and use, reduces the impact on the screw hole structure, and prolongs the service life.

[0034] The working principle of the self-locking screw is as follows:

[0035] Before the screw is used, the elastic sleeve 2 is stretched to cover the screw rod 1, then the plugging stud 6 is inserted into the circular structure and threadedly connected with the internal thread structure 5, and the rod head of the screw rod 1 is abutted, so that the screw rod 1 is stably located in the elastic sleeve 2, thereby the elastic sleeve 2 can effectively protect the screw rod 1, and the threads on the screw rod 1 are prevented from being difficult to be threadedly assembled with the screw hole due to wear.

[0036] When the screw is used, after the plugging stud 6 is unscrewed, the elastic sleeve 2 is compressed to make the screw rod 1 slide out of the circular structure, and then the screw rod 1 is inserted into the screw hole to be threadedly screwed in, along with the screw rod 1 being screwed into the screw hole, the elastic sleeve 2 is further compressed, when the circular structure is located between the rod cap 11 and the screw hole, since the diameter of the circular structure decreases from top to bottom, the tapered heads of the tapered seats 3 are inserted into the opening of the screw hole, along with the rod cap 11 being continuously abutted, at this time, the plastic sheet 4 in the circular structure formed by the tapered seats 3 is continuously abutted to the opening of the screw hole due to the abutting force of the rod cap 11, when the abutting force reaches a certain degree, the V-shaped breaking groove 4a guides the plastic sheet 4 to break directionally, so that the inner diameter of the annularly distributed tapered seats 3 is further reduced, forcing the tapered seats 3 to be embedded in the screw hole, until the tapered seats 3 are partially abutted to the screw hole, thereby forming radial damping to the screw rod 1, realizing the self-locking effect of the screw rod 1, avoiding the screw rod 1 from slipping out of the screw hole due to vibration in the later period, and significantly improving the anti-vibration loosening capability.

[0037] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A spin locking screw, comprising a screw rod (1), an integral rod cap (11) is fixedly embedded on the screw rod (1), and a cross slot is formed on the upper surface of the rod cap (11), characterized in that: a flexible telescopic sleeve (2) for covering the screw rod (1) is fixedly installed on the lower surface of the rod cap (11), a plurality of annularly distributed conical seats (3) are fixedly embedded on the sleeve opening of the flexible telescopic sleeve (2) away from the rod cap (11), plastic sheets (4) are fixedly installed between adjacent conical seats (3), and the conical seats (3) and the plastic sheets (4) are arranged in a spaced manner and constitute a circular structure. The plurality of conical seats (3) are fixed to each other by the plastic sheets (4) and constitute an inverted circular table structure, and the diameter of the circular table structure decreases from top to bottom.

2. The locking screw of claim 1, wherein, An internal thread structure (5) is arranged on the inner wall of the circular structure.

3. The self-locking screw according to claim 2, wherein A threaded connection plug stud (6) is inserted into the internal thread structure (5), and the plug stud (6) abuts against the nail head end of the screw rod (1).

4. The self-locking screw according to claim 3, wherein A V-shaped breaking groove (4a) is formed on the outer arc surface of the plastic sheet (4) away from the axis.

5. The self-locking screw according to claim 1, wherein A rubber ring (7) is fixedly installed on the lower surface of the rod cap (11), and the rubber ring (7) is located outside the connecting end of the flexible telescopic sleeve (2).

6. The self-locking screw according to claim 1, wherein ​

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