Improved locking screw

Abstract

The utility model relates to an improved locking screw, including fixed body, the outside of screw head is provided with first fixed structure, the first fixed structure includes rotation cover, the top of screw head is provided with rotation cover, the inside fixed mounting of rotation cover has rotation ring, the outer fixed surface of rotation ring installs limit ring, the inside fixed mounting of rotation ring has the internal tooth circle, the inner bottom wall fixed mounting of screw head has limit cylinder, the inside rotation of limit cylinder is connected with first screw rod, the top fixed mounting of first screw rod has gear. The improved locking screw, through first fixed structure realizes the preliminary mechanical locking of screw head and fixed body, then through the transmission part of second fixed structure to the first fixed structure and fixes, prevents its slack, double guarantee effectively avoids the locking screw and appears slack because of vibration, impact and so on external force effect, has improved the stability and reliability of connection obviously.

Description

Technical Field

[0001] This utility model relates to the field of locking screw technology, specifically an improved locking screw. Background Technology

[0002] Locking screws are a type of fastener with unique functions. Their core function is to effectively prevent connected parts from loosening due to vibration, impact, or external forces. Through special design, they can generate additional friction or mechanical locking effect after being tightened, thereby significantly improving the stability and reliability of the connection.

[0003] A search revealed a non-detachable locking screw disclosed in Chinese utility model patent publication number CN220060202U. This non-detachable locking screw, through the design of a nut, screw rod, straight groove, sliding hole, and slider, allows the screw rod portion to easily expand. When the locking screw is inserted into the threaded hole, it compresses the slider, causing the slider to slide within the sliding hole under reaction force, thereby compressing the screw rod portion and expanding it. This improves the tightening performance and stability of the locking screw and reduces the possibility of automatic disengagement. However, the locking structure of this non-detachable locking screw needs optimization, as it reduces the locking effect. Therefore, an improved locking screw is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an improved locking screw with advantages such as double locking, thus solving the problem that the existing structure needs to be optimized.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved locking screw, comprising a fixing body, a screw rod internally threaded to the fixing body, a screw head fixedly mounted on the top of the screw rod, a first fixing structure externally provided on the screw head, and a second fixing structure internally provided on the screw head; The first fixing structure includes a rotating sleeve. A rotating sleeve is provided on the top of the screw head. A rotating ring is fixedly installed inside the rotating sleeve. A limiting ring is fixedly installed on the outer surface of the rotating ring. An internal gear ring is fixedly installed inside the rotating ring. A limiting cylinder is fixedly installed on the inner bottom wall of the screw head. A first threaded rod is rotatably connected inside the limiting cylinder. A gear is fixedly installed on the top of the first threaded rod. A lifting rod is threadedly connected to the outer surface of the first threaded rod. A lifting ring is fixedly installed at the bottom of the lifting rod. A positioning block is fixedly installed at the bottom of the lifting ring.

[0006] Furthermore, the second fixing structure includes a second threaded rod, the inner top of the rotating sleeve is threadedly connected to the second threaded rod, the top of the second threaded rod is fixedly mounted with a hexagonal head, the bottom of the second threaded rod is rotatably connected to a lifting plate, the bottom of the lifting plate is fixedly mounted with a fixing rod, and the top of the rotating ring is fixedly mounted with a guide rod.

[0007] Furthermore, the outer surface of the rotating sleeve is provided with anti-slip texture, the inside of the screw head is provided with a limiting groove that matches the limiting ring, and four limiting cylinders are fixedly installed on the inner bottom wall of the screw head. A first threaded rod is rotatably connected between the inner top wall of each limiting cylinder and the inner bottom wall of the screw head. The top of each first threaded rod extends to the outside of each limiting cylinder and is fixedly installed with a gear.

[0008] Furthermore, the outer surfaces of all four gears mesh with the interior of the internal gear ring, the outer surface of each of the first threaded rods is threaded with a lifting rod, the outer surface of each lifting rod is fixedly fitted with a guide ring, the outer surface of the guide ring is adapted to the interior of the limiting cylinder, the bottom of each of the four lifting rods penetrates the inner bottom wall of the screw head and is fixedly connected to the top of the lifting ring, the bottom of the lifting ring is fixedly fitted with four positioning blocks, and the top of the fixing body is provided with positioning holes adapted to the positioning blocks.

[0009] Furthermore, the top of the rotating sleeve is provided with a rotating groove, and the top of the second threaded rod extends into the interior of the rotating groove and is fixedly connected to the bottom of the hexagonal head.

[0010] Furthermore, two guide rods are fixedly installed on the top of the rotating ring, and the outer surfaces of the two guide rods are movably connected to the interior of the lifting plate. Four fixing rods are fixedly installed on the bottom of the lifting plate, and the top of the four gears are all provided with fixing holes that are adapted to the fixing rods. Beneficial effects

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects: This improved locking screw achieves initial mechanical locking between the screw head and the fixing body through a first fixing structure, and then fixes the transmission components of the first fixing structure through a second fixing structure to prevent them from loosening. This dual protection effectively avoids the locking screw from loosening due to external forces such as vibration and impact, significantly improving the stability and reliability of the connection. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 3This is a front sectional view of the present invention. Figure 4 This is a partial top view of the structure of this utility model; Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0013] In the diagram: 1. Fixing body; 2. Screw; 3. Screw head; 4. First fixing structure; 401. Rotating sleeve; 402. Rotating ring; 403. Limiting ring; 404. Internal gear ring; 405. Limiting cylinder; 406. First threaded rod; 407. Gear; 408. Lifting rod; 409. Lifting ring; 410. Positioning block; 5. Second fixing structure; 501. Second threaded rod; 502. Hexagonal head; 503. Lifting plate; 504. Fixing rod; 505. Guide rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 An improved locking screw includes a fixing body 1, a screw rod 2 is internally threaded to the fixing body 1, a screw head 3 is fixedly installed on the top of the screw rod 2, a first fixing structure 4 is provided on the outside of the screw head 3, and a second fixing structure 5 is provided inside the screw head 3; The first fixed structure 4 includes a rotating sleeve 401. The top of the screw head 3 is provided with the rotating sleeve 401. A rotating ring 402 is fixedly installed inside the rotating sleeve 401. A limiting ring 403 is fixedly installed on the outer surface of the rotating ring 402. An internal gear ring 404 is fixedly installed inside the rotating ring 402. A limiting cylinder 405 is fixedly installed on the inner bottom wall of the screw head 3. A first threaded rod 406 is rotatably connected inside the limiting cylinder 405. A gear 407 is fixedly installed on the top of the first threaded rod 406. A lifting rod 408 is threadedly connected to the outer surface of the first threaded rod 406. A lifting ring 409 is fixedly installed on the bottom of the lifting rod 408. A positioning block 410 is fixedly installed on the bottom of the lifting ring 409.

[0016] Furthermore, the second fixed structure 5 includes a second threaded rod 501, the inner top of the rotating sleeve 401 is threadedly connected to the second threaded rod 501, the top of the second threaded rod 501 is fixedly mounted with a hexagonal head 502, the bottom of the second threaded rod 501 is rotatably connected to a lifting plate 503, the bottom of the lifting plate 503 is fixedly mounted with a fixing rod 504, and the top of the rotating ring 402 is fixedly mounted with a guide rod 505.

[0017] Specifically, such as Figure 3 As shown, firstly, the screw 2 is threaded into the interior of the fixing body 1 and tightened to the appropriate position to complete the initial installation of the locking screw. Then, the rotating sleeve 401 is rotated, which drives the internal rotating ring 402 to rotate. The internal gear ring 404 on the rotating ring 402 rotates synchronously. Since the internal gear ring 404 meshes with the four gears 407, it drives the four first threaded rods 406 to rotate synchronously. When the first threaded rod 406 rotates, the lifting rod 408 threaded on its outer surface moves downward along the limiting cylinder 405 under the limiting action of the guide ring and the limiting cylinder 405. The lifting rod 408 drives the bottom lifting ring 409 and the positioning block 410 to move downward synchronously until the positioning block 410 is inserted into the positioning hole at the top of the fixing body 1, completing the first locking.

[0018] Specifically, such as Figure 3 As shown, finally, the hexagonal head 502 is rotated using a tool. The hexagonal head 502 drives the second threaded rod 501 to rotate. Since the second threaded rod 501 is threadedly connected to the top of the rotating sleeve 401, and the lifting plate 503 cannot rotate under the limiting action of the guide rod 505, the rotation of the second threaded rod 501 will push the lifting plate 503 to move downward along the guide rod 505. The lifting plate 503 drives the bottom fixing rod 504 to move downward synchronously until the fixing rod 504 is inserted into the fixing hole at the top of the gear 407, thereby fixing the gear 407 and preventing it from rotating, thus completing the second locking.

[0019] Specifically, such as Figure 3 As shown, the screw head 3 has a limiting groove inside that matches the limiting ring 403. The limiting ring 403 can rotate within the limiting groove to limit the rotation ring 402.

[0020] In summary, this improved locking screw achieves initial mechanical locking between the screw head 3 and the fixing body 1 through the first fixing structure 4, and then fixes the transmission component of the first fixing structure 4 through the second fixing structure 5 to prevent it from loosening. This dual protection effectively avoids the locking screw from loosening due to external forces such as vibration and impact, and significantly improves the stability and reliability of the connection.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved locking screw, comprising a fixing body (1), characterized in that: The fixing body (1) is internally threaded with a screw rod (2), and a screw head (3) is fixedly installed on the top of the screw rod (2). A first fixing structure (4) is provided on the outside of the screw head (3), and a second fixing structure (5) is provided inside the screw head (3). The first fixing structure (4) includes a rotating sleeve (401), the top of the screw head (3) is provided with a rotating sleeve (401), a rotating ring (402) is fixedly installed inside the rotating sleeve (401), a limiting ring (403) is fixedly installed on the outer surface of the rotating ring (402), an internal gear ring (404) is fixedly installed inside the rotating ring (402), a limiting cylinder (405) is fixedly installed on the inner bottom wall of the screw head (3), a first threaded rod (406) is rotatably connected inside the limiting cylinder (405), a gear (407) is fixedly installed on the top of the first threaded rod (406), a lifting rod (408) is threadedly connected to the outer surface of the first threaded rod (406), a lifting ring (409) is fixedly installed at the bottom of the lifting rod (408), and a positioning block (410) is fixedly installed at the bottom of the lifting ring (409).

2. The improved locking screw according to claim 1, characterized in that: The second fixing structure (5) includes a second threaded rod (501), the inner top of the rotating sleeve (401) is threaded with the second threaded rod (501), the top of the second threaded rod (501) is fixedly installed with a hexagonal head (502), the bottom of the second threaded rod (501) is rotatably connected with a lifting plate (503), the bottom of the lifting plate (503) is fixedly installed with a fixing rod (504), and the top of the rotating ring (402) is fixedly installed with a guide rod (505).

3. An improved locking screw according to claim 1, characterized in that: The outer surface of the rotating sleeve (401) is provided with anti-slip texture, and the inside of the screw head (3) is provided with a limiting groove that matches the limiting ring (403). Four limiting cylinders (405) are fixedly installed on the inner bottom wall of the screw head (3). A first threaded rod (406) is rotatably connected between the inner top wall of each limiting cylinder (405) and the inner bottom wall of the screw head (3). The top of each first threaded rod (406) extends to the outside of each limiting cylinder (405) and is fixedly installed with a gear (407).

4. An improved locking screw according to claim 1, characterized in that: The outer surfaces of the four gears (407) mesh with the interior of the internal gear ring (404). The outer surface of each of the first threaded rods (406) is threaded with a lifting rod (408). The outer surface of each lifting rod (408) is fixedly installed with a guide ring. The outer surface of the guide ring is adapted to the interior of the limiting cylinder (405). The bottom of each of the four lifting rods (408) penetrates the inner bottom wall of the screw head (3) and is fixedly connected to the top of the lifting ring (409). The bottom of the lifting ring (409) is fixedly installed with four positioning blocks (410). The top of the fixing body (1) is provided with positioning holes adapted to the positioning blocks (410).

5. An improved locking screw according to claim 2, characterized in that: The top of the rotating sleeve (401) is provided with a rotating groove, and the top of the second threaded rod (501) extends into the interior of the rotating groove and is fixedly connected to the bottom of the hexagonal head (502).

6. An improved locking screw according to claim 2, characterized in that: The top of the rotating ring (402) is fixedly equipped with two guide rods (505), the outer surfaces of the two guide rods (505) are movably connected to the interior of the lifting plate (503), the bottom of the lifting plate (503) is fixedly equipped with four fixing rods (504), and the top of the four gears (407) is provided with fixing holes that are adapted to the fixing rods (504).

Images