Double-threaded composite low-torque square thread quick-acting screw fastening assembly

Abstract

This utility model relates to the field of screw technology, specifically a double-threaded composite low-torque square-tooth quick-acting screw fastening assembly. The assembly includes a double-threaded square-tooth screw with two sets of wedges evenly placed inside. A conical head is placed on top of each wedge, and a cross bolt is positioned on the top of the conical head. An insert plate is located on the opposite sides of each set of wedges. When the double-threaded square-tooth screw is screwed into wood and its head is embedded, the connecting ring and limiting post can be removed. Then, by continuing to rotate the cross bolt, the conical head moves downwards, pushing the two sets of wedges outwards. This causes the insert plate to move outwards and insert into the wood, thus fixing the head of the double-threaded square-tooth screw. This significantly improves the fastening performance of the double-threaded square-tooth screw while ensuring ease of use.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically to a double-threaded composite low-torque square-tooth quick-acting screw fastening assembly. Background Technology

[0002] Double-threaded square thread screws are commonly used in the furniture and wood manufacturing industry. The cutting angle of the square thread on the screw surface can cut wood fibers and other media, making it easier to drive the screw in. It can be driven in quickly with low torque. Then, the round thread section on the screw surface provides gripping force to prevent the screw from loosening and ensure the stability of the furniture structure. However, in actual use, it is difficult to make the screw very stable by relying solely on the gripping force provided by the thread. To address the above issues, we have made technical innovations based on the existing double-threaded composite low-torque square thread quick-acting screw fastening components. Utility Model Content

[0003] The purpose of this invention is to provide a double-threaded composite low-torque square-tooth quick-acting screw fastening assembly to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-threaded composite low-torque square thread quick-acting screw fastening assembly, comprising:

[0005] A double-threaded square screw has two sets of wedges evenly placed inside. A cone head is placed on the top of each set of wedges, and a cross bolt is provided on the top of the cone head. A set of insert plates is provided on the opposite sides of each set of wedges. Two sets of through holes are evenly opened on the top of the cross bolt. An insertion hole is opened on the top of the insert plate. A limit post is inserted into the through hole and the insertion hole. A magnetic block is embedded in the bottom of the limit post and the magnetic block is magnetically attracted into the insertion hole.

[0006] Preferably, a connecting ring is placed on the top of the cross bolt, two sets of limiting posts are evenly arranged at the bottom of the connecting ring, and the opposite sides of the two sets of wedges are in contact with the outer side wall of the cone.

[0007] Preferably, the double-threaded square screw has an internally threaded countersunk hole at the top of the screw head, and a sliding groove is formed through the front side of the screw head, with the internally threaded countersunk hole communicating with the sliding groove.

[0008] Preferably, the bottom of the internal thread countersunk hole is provided with two sets of guide holes, which are connected to the slide groove.

[0009] Preferably, the cross bolt is screwed into the internal thread countersunk hole, the cone head is disposed in the internal thread countersunk hole, and the bottom of the cone head is located in the groove, and the wedge and the insert plate are disposed in the groove.

[0010] Preferably, the bottom of the limiting post passes through the guide hole and is inserted into the insertion hole of the insert plate, and the side of the insert plate away from the wedge is sharpened.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention uses a limiting post to limit the cross bolt, allowing the double-threaded square screw to be screwed into the wood by rotating the cross bolt. At the same time, by inserting the limiting post into the insertion hole of the insert plate, the insert plate is stabilized within the groove of the double-threaded square screw, thus preventing the insert plate from interfering with the screw's insertion into the wood. In addition, the magnetic force of the magnetic block on the insert plate improves the stability of the limiting post, thereby ensuring the reliability of the entire double-threaded square screw.

[0013] Once the double-threaded square screw is screwed into the wood and its head is embedded, the connecting ring and the limiting post can be removed. Then, continue to rotate the cross bolt to move the cone head downwards and push the two sets of wedges outwards. This causes the insert plate to move outwards and insert into the wood, thereby fixing the head of the double-threaded square screw. This achieves a significant improvement in the fastening performance of the double-threaded square screw while ensuring ease of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the double-threaded composite low-torque square-tooth quick-acting screw fastening assembly of this utility model;

[0015] Figure 2 This is a front sectional view of the double-threaded composite low-torque square-tooth quick-acting screw fastening assembly of this utility model.

[0016] Figure 3 This utility model Figure 2 Enlarged view of part A.

[0017] In the diagram: 1. Double-threaded square screw; 11. Connecting ring; 12. Cross bolt; 13. Limiting post; 14. Conical head; 15. Magnetic block; 16. Wedge block; 17. Insert plate. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-3A double-threaded composite low-torque square thread quick-acting screw fastening assembly includes a double-threaded square thread screw 1. Two sets of wedges 16 are evenly placed inside the double-threaded square thread screw 1. A cone head 14 is placed on top of each set of wedges 16. A cross bolt 12 is fixedly installed on the top of the cone head 14. A set of insert plates 17 is fixedly installed on opposite sides of each set of wedges 16. Two sets of through holes are evenly opened on the top of the cross bolt 12. Insert holes are opened on the top of the insert plates 17. Limiting posts 13 are inserted into the through holes and insert holes. A magnetic block 15 is embedded in the bottom of the 13, and the magnetic block 15 is magnetically attracted into the insertion hole. A connecting ring 11 is placed on the top of the cross bolt 12. Two sets of limiting posts 13 are evenly fixed at the bottom of the connecting ring 11. The opposite sides of the two sets of wedges 16 are in contact with the outer side wall of the cone head 14. The cross bolt 12 is rotated by using a cross screwdriver. Since the cross bolt 12 is limited by the limiting posts 13, when the cross bolt 12 rotates, it will drive the double-threaded square screw 1 to rotate through the limiting posts 13, thereby limiting the movement. The post 13 is screwed into the wood. As the double-threaded square screw 1 is tightened, the head of the double-threaded square screw 1 embeds into the wood. The top of the head of the double-threaded square screw 1 has an internally threaded countersunk hole. A groove is formed through the front side of the head of the double-threaded square screw 1, and the internally threaded countersunk hole communicates with the groove. Two sets of guide holes are evenly formed at the bottom of the internally threaded countersunk hole, and the guide holes communicate with the groove. The cross bolt 12 is screwed into the internally threaded countersunk hole. The conical head 14 is slidably positioned within the internally threaded countersunk hole, and the bottom of the conical head 14 is... Within the groove, the wedge 16 and the insert plate 17 are slidably disposed. The bottom of the limiting post 13 passes through the guide hole and is inserted into the insertion hole of the insert plate 17. By inserting the limiting post 13 into the insertion hole of the insert plate 17, the insert plate 17 is stabilized within the groove of the double-threaded square screw 1, thereby preventing the insert plate 17 from interfering with the screw 1 being screwed into the wood. At the same time, the magnetic force of the magnet 15 on the insert plate 17 can improve the stability of the limiting post 13. The side of the insert plate 17 away from the wedge 16 is sharpened.

[0020] Working principle: A Phillips screwdriver drives the Phillips bolt 12 to rotate. Since the Phillips bolt 12 is limited by the limiting post 13, when the Phillips bolt 12 rotates, it drives the double-threaded square screw 1 to rotate through the limiting post 13, thus screwing the limiting post 13 into the wood. Simultaneously, by inserting the limiting post 13 into the insertion hole of the insert plate 17, the insert plate 17 is stabilized within the groove of the double-threaded square screw 1, thus preventing the insert plate 17 from interfering with the screw 1's insertion into the wood. At the same time, the magnetic force of the magnet 15 on the insert plate 17 improves the stability of the limiting post 13. As the double-threaded square screw... Tightening the square screw 1 will cause the head of the double-threaded square screw 1 to embed into the wood. Then, the connecting ring 11 moves upward to separate the limiting post 13 from the cross bolt 12. The cross bolt 12 continues to rotate. At this time, the cross bolt 12 rotates downward through the internal thread countersunk hole of the double-threaded square screw 1, thereby driving the cone head 14 to move downward and push the two sets of wedges 16 to move outward. Then, the wedges 16 drive the insert plate 17 to move outward and insert into the wood, thereby fixing the head of the double-threaded square screw 1 embedded in the wood, thereby improving the overall fastening of the double-threaded square screw 1.

Claims

1. A double-threaded composite low-torque square-tooth quick-acting screw fastening assembly, characterized in that, include: A double-threaded square screw (1) has two sets of wedges (16) evenly placed inside. A cone (14) is placed on the top of the two sets of wedges (16). A cross bolt (12) is provided on the top of the cone (14). A set of insert plates (17) is provided on the opposite sides of the two sets of wedges (16). Two sets of through holes are evenly opened on the top of the cross bolt (12). An insertion hole is opened on the top of the insert plate (17). A limit post (13) is inserted into the through hole and the insertion hole. A magnetic block (15) is embedded in the bottom of the limit post (13). The magnetic block (15) is magnetically attracted in the insertion hole.

2. The dual-thread composite low-torque square thread quick-acting screw fastening assembly according to claim 1, characterized in that: A connecting ring (11) is placed on the top of the cross bolt (12), and two sets of limiting posts (13) are evenly arranged at the bottom of the connecting ring (11). The opposite sides of the two sets of wedges (16) are in contact with the outer wall of the cone head (14).

3. The dual-thread composite low-torque square thread quick-acting screw fastening assembly according to claim 2, characterized in that: The double-threaded square screw (1) has an internal thread countersunk hole at the top of the screw head, and a sliding groove is provided through the front side of the screw head. The internal thread countersunk hole is connected to the sliding groove.

4. The dual-thread composite low-torque square thread quick-acting screw fastening assembly according to claim 3, characterized in that: The bottom of the internal thread countersunk hole is provided with two sets of guide holes, which are connected to the slide groove.

5. The dual-thread composite low-torque square thread quick-acting screw fastening assembly according to claim 4, characterized in that: The cross bolt (12) is screwed into the internal thread countersunk hole, the cone head (14) is set in the internal thread countersunk hole, and the bottom of the cone head (14) is located in the groove. The wedge (16) and the insert plate (17) are set in the groove.

6. The dual-thread composite low-torque square thread quick-acting screw fastening assembly according to claim 5, characterized in that: The bottom of the limiting post (13) passes through the guide hole and is inserted into the insertion hole of the insert plate (17). The side of the insert plate (17) away from the wedge (16) is sharpened.

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