A screw type fixed connector

Abstract

The utility model relates to circuit or signal transmission connecting component technical field, and disclose a screw type fixed connector, it includes female head, male head and locking nut, female head is equipped with circular groove and binding post, male head is integrally formed by big round head and small round head, small round head is equipped with binding groove and is adapted to plug -in with circular groove, locking nut is connected by thread and female head screwing, the circular groove mouth is equipped with chamfer and realizes the direction, and the boss structure cooperation thread forms double locking and limit, simultaneously through triple sealing ring respectively sealed end face, thread gap and locking cooperation surface, the connector passes through optimization structure design, has solved the existing product butt joint misplacement, connection loose, insufficient sealing and the problem such as inconvenient dismounting, possesses assembly precision efficient, connection stable anti -vibration, sealing comprehensive reliable, the advantage that maintenance is convenient, can significantly improve equipment operation reliability and service life.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit or signal transmission connection components, specifically a screw-type fixing connector. Background Technology

[0002] In industrial equipment, electronic devices, and other fields, screw-type fixed connectors are core components for achieving stable circuit or signal transmission, and their connection reliability directly affects the overall operating efficiency of the equipment. Currently, mainstream screw-type connectors suffer from several problems due to structural design limitations. Some products lack effective guiding structures, leading to misalignment of wiring components during male-female connector mating. This not only reduces assembly efficiency but may also affect transmission stability due to poor contact. The locking mechanism is simplistic, making the threaded connection prone to loosening and failure under complex conditions such as vibration and impact. The sealing design is inadequate; most connectors use only a single sealing structure, failing to adequately protect critical areas such as the end face and thread clearance. Moisture and dust can easily penetrate, corroding the wiring components. Furthermore, some products use multi-component splicing for their core structure, resulting in insufficient overall strength and cumbersome disassembly and assembly processes, increasing subsequent maintenance costs. Therefore, we propose a screw-type fixed connector. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a screw-type fixing connector, which solves the problems of easy misalignment of wiring components and imperfect sealing design when male and female heads are connected in the aforementioned background technology.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a screw-type fixing connector, comprising: The female head has a cylindrical structure. One end of the female head has a circular groove along its axial direction. A connector is installed inside the circular groove. The connector is vertically installed in a direction perpendicular to the bottom of the circular groove. A row of external threads is opened on the outer surface of the female head near the opening of the circular groove. A boss is integrally formed on the side of the female head away from the opening of the circular groove. The male connector has a cylindrical boss structure, including a large round head and a small round head that are integrally formed. The outer wall size of the small round head is adapted to the inner wall size of the circular groove. The small round head is inserted into the circular groove. The end face of the small round head near the female connector has an embedded wiring groove that is adapted to the connector. When the male and female connectors are connected, the connector and the wiring groove are inserted into each other. A set of second bosses is integrally formed on the outer surface of the large round head near the small round head. The locking nut is movably fitted at the connection between the female and male heads. The inner hole of the locking nut is provided with an internal thread and a third boss in sequence along its axial direction. The internal thread is adapted to the external thread of the female head and is connected by thread engagement. The third boss and the second boss abut against each other.

[0005] Preferably, a set of annular grooves is embedded in the annular end face located outside the circumference of the circular groove. A first sealing ring is embedded inside the annular groove, and the thickness of the first sealing ring is greater than the depth of the annular groove. When the female head and the male head are connected, the first sealing ring and the end face of the small round head are tightly abutted.

[0006] Preferably, the outer diameter of the first boss is larger than the inner diameter of the locking nut, and when the locking nut moves along the axial direction of the female head, the first boss abuts against the end face of the locking nut.

[0007] Preferably, a set of No. 2 sealing rings is fitted on the end face of the No. 1 boss near the external thread, and the other end of the No. 2 sealing ring abuts against the end face of the lock nut to seal the gap between the female head and the lock nut.

[0008] Preferably, a set of No. 3 sealing rings is provided at the abutment of No. 2 and No. 3, and the No. 3 sealing rings are fitted on the side of No. 2 away from the small round head.

[0009] Preferably, the inner wall of the circular groove opening is provided with a set of chamfers, which are gradually tapered inward from the opening of the circular groove to guide the small round head during the insertion of the circular groove.

[0010] Preferably, the inner wall of the third boss is matched with the outer wall size of the large round head.

[0011] Compared with the prior art, the present invention provides a screw-type fixing connector, which has the following advantages: Firstly, the chamfered opening of the circular groove ensures precise guidance, and the size matching between the small round head and the circular groove effectively prevents misalignment between the connector and the groove, significantly improving assembly efficiency and transmission contact reliability. Secondly, the internal thread of the locking nut engages with the external thread of the female head, and the contact limit of the No. 3 and No. 2 bosses, along with the stroke control of the No. 1 boss, form a double locking guarantee, significantly enhancing connection stability under vibration and impact conditions and reducing the risk of loosening and failure. Thirdly, the No. 1, No. 2, and No. 3 sealing rings form a triple seal on the end face, thread gap, and locking mating surface, respectively, comprehensively preventing moisture and dust from penetrating, extending the service life of internal components, and adapting to complex and harsh environments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the female head structure of this utility model; Figure 4 This is a schematic diagram of the male connector structure of this utility model.

[0013] In the diagram: 1. Female connector; 2. Circular groove; 3. Connector; 4. External thread; 5. Boss No. 1; 6. Male connector; 7. Large round head; 8. Small round head; 9. Connector groove; 10. Boss No. 2; 11. Locking nut; 12. Internal thread; 13. Boss No. 3; 14. Annular groove; 15. Sealing ring No. 1; 16. Sealing ring No. 2; 17. Sealing ring No. 3; 18. Chamfer. 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 1-4 This utility model provides a technical solution: A screw-type fixing connector, comprising: The female head 1 has a cylindrical structure. A circular groove 2 is provided at one end of the female head 1 along its axial direction. A connector 3 is provided inside the circular groove 2. The connector 3 is vertically arranged in a direction perpendicular to the bottom of the circular groove 2. A row of external threads 4 is provided on the outer surface of the female head 1 near the groove opening of the circular groove 2. A boss 5 is integrally formed on the side of the female head 1 away from the groove opening of the circular groove 2. The male connector 6 has a cylindrical boss structure, including an integrally formed large round head 7 and a small round head 8. The outer wall size of the small round head 8 is compatible with the inner wall size of the circular groove 2. The small round head 8 is inserted into the circular groove 2. The end face of the small round head 8 near the female connector 1 is embedded with a wiring groove 9 that is compatible with the connector 3. When the male connector 6 and the female connector 1 are connected, the connector 3 and the wiring groove 9 are inserted into each other. A set of second bosses 10 is integrally formed on the outer surface of the large round head 7 near the small round head 8. Locking nut 11 is movably sleeved at the connection between female head 1 and male head 6. The inner hole of locking nut 11 is provided with internal thread 12 and third boss 13 in sequence along its axial direction. Internal thread 12 is adapted to external thread 4 of female head 1 and connected by thread engagement. Third boss 13 and second boss 10 abut against each other.

[0016] Furthermore, an annular groove 14 is embedded in the annular end face located on the outer side of the circular groove 2. A first sealing ring 15 is embedded inside the annular groove 14, and the thickness of the first sealing ring 15 is greater than the depth of the annular groove 14. When the female head 1 is connected to the male head 6, the first sealing ring 15 is in close contact with the end face of the small round head 8.

[0017] Furthermore, the outer diameter of the first boss 5 is larger than the inner diameter of the locking nut 11. When the locking nut 11 moves along the axial direction of the female head 1, the first boss 5 abuts against the end face of the locking nut 11. Through the dimensional difference between the first boss 5 and the inner wall of the locking nut 11 and the abutment of the end face, the mechanical limit of the screwing stroke of the locking nut 11 is achieved, avoiding over-tightening that could damage the threads, wiring components, etc., while ensuring that the locking force is stable and controllable.

[0018] Furthermore, a set of second sealing rings 16 is fitted on the end face of the first boss 5 near the external thread 4. The other end of the second sealing ring 16 abuts against the end face of the locking nut 11 to seal the gap between the female head 1 and the locking nut 11. By fitting the second sealing ring 16 on the end face of the first boss 5 near the external thread 4, and having its other end abut against the end face of the locking nut 11, the mating gap between the female head 1 and the locking nut 11 can be accurately filled, forming a reliable sealing barrier. This design can effectively prevent moisture, dust and other impurities from seeping into the connector through the thread gap, avoiding corrosion or damage to the internal thread structure and wiring components, ensuring the sealing stability of the connection between the female head 1 and the locking nut 11, and further extending the overall service life of the connector.

[0019] Furthermore, a set of No. 3 sealing rings 17 are provided at the abutment of No. 2 boss 10 and No. 3 boss 13. The No. 3 sealing rings 17 are fitted onto the side of No. 2 boss 10 away from the small round head 8.

[0020] Furthermore, the inner wall of the circular groove 2 is provided with a set of chamfers 18. The chamfers 18 are gradually tapered inward from the opening of the circular groove 2 to guide the small round head 8 during insertion into the circular groove 2. By setting a third sealing ring 17 at the abutment of the second boss 10 and the third boss 13, and fitting it on the side of the second boss 10 away from the small round head 8, the mating gap between the two can be accurately filled to form an effective sealing barrier. This design can prevent moisture, dust and other impurities from seeping into the connector from the mating surface of the locking nut 11 and the male head 6, avoiding corrosion or contamination of the wiring components and the boss mating structure, further enhancing the overall sealing performance of the connector, ensuring connection stability and transmission reliability, and extending the service life of the connector.

[0021] Furthermore, the inner wall of the third boss 13 is adapted to the outer wall of the large round head 7. Through the adaptation of the inner wall of the third boss 13 to the outer wall of the large round head 7, the male head 6 can be precisely radially positioned and limited, ensuring that the male head 6 and the female head 1 always maintain coaxiality when connected, avoiding radial offset. This design makes the locking nut 11 tightening process smoother, ensuring the precise docking and stable contact between the connector 3 and the connector groove 9, further ensuring transmission reliability.

[0022] Structural Description: Female connector 1: It has a cylindrical structure with a circular groove 2 at one end, an external thread 4 on one outer surface, and a first boss 5 integrally formed on the other side, which is the main component of the connector. Circular groove 2: A circular groove is opened along the axial direction at one end of the female head 1, and a wire head 3 is set inside. The inner wall of the groove has a chamfer 18 for insertion and mating with the small round head 8. Terminal 3: It is vertically installed inside the circular groove 2 along the direction perpendicular to the bottom of the groove 2, and is adapted to the wiring groove 9. When the male and female terminals are connected, they can be plugged in. External thread 4: A row of threads is formed on the outer surface of the female head 1 near the opening of the circular groove 2, which is compatible with the internal thread 12 and is connected to the lock nut 11 by thread engagement; Boss 5: The female head 1 is integrally formed on the side away from the groove of the circular groove 2, and a second sealing ring 16 is sleeved on the side near the external thread 4, which can abut against the end face of the locking nut 11. Male connector 6: It has a cylindrical boss structure and is composed of a large round head 7 and a small round head 8 that are integrally formed. It is inserted into the female connector 1 through the small round head 8 and is the male end component of the connector. Large round head 7: A component of male head 6, integrally formed with small round head 8. There is a second boss 10 on the outer surface near the small round head 8, and the outer wall is adapted to the inner wall size of the third boss 13. Small round head 8: A component of male head 6, its outer wall size is adapted to the inner wall of circular groove 2, and its end face is embedded with wiring groove 9, which is plugged into circular groove 2 to realize the mating of male and female heads; Wiring groove 9: A groove embedded in the small round head 8 near the end face of the female head 1, which is compatible with the wiring head 3 and is inserted into the wiring head 3 when the male and female heads are connected. Second boss 10: A set of structures integrally formed on the outer surface of the large round head 7 near the small round head 8, with a third sealing ring 17 at the abutment point for mate with the third boss 13. Locking nut 11: A component that is movably sleeved at the connection between female head 1 and male head 6. The inner hole has an internal thread 12 and a No. 3 boss 13. The male and female heads are locked by screwing the threads together. Internal thread 12: A threaded structure provided in the inner hole of the lock nut 11, which is adapted to the external thread 4 of the female head 1, and the lock nut 11 and the female head 1 are connected by screwing. Boss 13: A boss structure set in the inner hole of the locking nut 11, which abuts against Boss 10, and the inner wall is adapted to the outer wall size of the large round head 7. Annular groove 14: A set of grooves embedded in the annular end face of the outer circumference of the circular groove 2, used to embed the No. 1 sealing ring 15, providing installation space for sealing; No. 1 sealing ring 15: a sealing component embedded in the annular groove 14, with a thickness greater than the depth of the annular groove 14, and tightly abutting against the end face of the large round head 7 when the female head 1 is connected to the male head 6. No. 2 sealing ring 16: a sealing component fitted on the end face of the No. 1 boss 5 near the external thread 4, and the other end abutting against the end face of the lock nut 11, the gap between the sealing head 1 and the lock nut 11; No. 3 sealing ring 17: A sealing component set at the abutment of No. 2 boss 10 and No. 3 boss 13, which is sleeved on the side of No. 2 boss 10 away from the small round head 8 to enhance the sealing performance of the connection. Chamfer 18: A structure set on the inner wall of the circular groove 2, which is gradually tapered from the groove opening into the groove, to provide guidance for the small round head 8 to be inserted into the circular groove 2.

[0023] Working Principle: During the mating stage, the connector achieves precise engagement through a guiding and positioning structure. The small round head 8 of the male connector 6 is sized to match the circular groove 2 of the female connector 1, serving as the core carrier for the insertion and mating. During mating, the chamfer 18 on the inner wall of the circular groove 2 plays a crucial guiding role. Its design, which tapers inward from the groove opening, guides the small round head 8 to quickly align with the central axis of the circular groove 2, preventing misalignment of the connector 3 and the groove 9 due to mating deviation. The operator simply inserts the small round head 8 of the male connector 6 into the circular groove 2 of the female connector 1 along the guiding direction of the chamfer 18. As the insertion depth increases, the end face of the large round head 7 gradually approaches the annular end face of the circular groove 2 until the connector 3 is fully inserted into the groove 9, achieving the conduction of the circuit or signal transmission channel. At this point, the end face of the large round head 7 of the male connector 6 and the female connector 1 are initially in contact, laying the foundation for the subsequent locking process.

[0024] During the locking phase, the male and female heads are tightly fixed through threaded transmission and boss limiting. After the initial connection is completed, the locking nut 11 sleeved at the connection is rotated, and its internal thread 12 engages with the external thread 4 on the outer surface of the female head 1, causing the locking nut 11 to move along the axial direction of the female head 1 towards the male head 6. As the locking nut 11 continues to rotate, its internal third boss 13 gradually approaches the second boss 10 of the male head 6, and finally forms a tight abutment with the second boss 10. Due to the inner wall of the third boss 13... The outer wall size of the large round head 7 is adapted to the contact size. During the contact process, it can form a radial limit on the male head 6, ensuring that the male and female heads always maintain coaxiality and avoid connection misalignment. At the same time, the first boss 5 on the side of the female head 1 will limit the maximum rotation stroke of the locking nut 11, preventing damage to the threads or wiring components due to over-tightening, and achieving effective control of the locking force. Through the self-locking characteristics of the threaded connection, the locking nut 11 can firmly fix the male head 6 and the female head 1, and even in the vibration environment, it can prevent the connection from loosening and ensure transmission stability.

[0025] During the sealing and protection phase, the triple sealing rings form an all-around protective barrier through compression deformation. When the male and female heads are inserted and fitted, the first sealing ring 15 on the outer annular end face of the circular groove 2 plays the first sealing role. Since the thickness of the first sealing ring 15 is greater than the depth of the annular groove 14, the end face of the large round head 7 will compress it, causing the sealing ring to undergo elastic deformation, filling the tiny gap between the end face of the large round head 7 and the female head 1, preventing external moisture, dust and other impurities from seeping in from the end face. At the same time, the second sealing ring 16, which is fitted on the first boss 5, is squeezed by the end face of the female head 1 and the end face of the locking nut 11, forming the second seal, sealing the thread gap between the female head 1 and the locking nut 11, preventing impurities from entering the connector through the thread gap. The third sealing ring 17, which is fitted on the second boss 10, is pressed when the third boss 13 and the second boss 10 abut, filling the mating gap between the locking nut 11 and the male head 6, forming the third sealing defense line. The triple sealing structure targets the end face, thread clearance, and locking mating surface respectively, forming a comprehensive protection that ensures the connector can still work stably in complex environments such as humid and dusty conditions.

[0026] 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. A screw-type fixing connector, characterized in that, include: The female head (1) has a cylindrical structure. A circular groove (2) is provided at one end of the female head (1) along its axial direction. A connector (3) is provided inside the circular groove (2). The connector (3) is vertically arranged in a direction perpendicular to the bottom of the circular groove (2). A row of external threads (4) is provided on the outer surface of the female head (1) near the opening of the circular groove (2). A boss (5) is integrally formed on the side of the female head (1) away from the opening of the circular groove (2). The male head (6) has a cylindrical boss structure, including a large round head (7) and a small round head (8) integrally formed. The outer wall size of the small round head (8) is adapted to the inner wall size of the circular groove (2). The small round head (8) is inserted into the circular groove (2). The small round head (8) is embedded in the end face of the female head (1) with a wiring groove (9) adapted to the wiring head (3). When the male head (6) and the female head (1) are connected, the wiring head (3) and the wiring groove (9) are inserted into each other. The outer surface of the large round head (7) near the small round head (8) is integrally formed with a set of second bosses (10). Locking nut (11) is movably sleeved at the connection between female head (1) and male head (6). The inner hole of locking nut (11) is provided with an internal thread (12) and a third boss (13) in sequence along its axial direction. The internal thread (12) is adapted to the external thread (4) of female head (1) and connected by thread engagement. The third boss (13) and the second boss (10) abut against each other.

2. The screw-type fixing connector according to claim 1, characterized in that, An annular groove (14) is embedded on the annular end face outside the circumference of the circular groove (2). A first sealing ring (15) is embedded inside the annular groove (14), and the thickness of the first sealing ring (15) is greater than the depth of the annular groove (14). When the female head (1) and the male head (6) are connected, the first sealing ring (15) and the end face of the small round head (8) are tightly abutted.

3. A screw-type fixing connector according to claim 2, characterized in that, The outer diameter of the first boss (5) is larger than the inner diameter of the locking nut (11). When the locking nut (11) moves along the axial direction of the female head (1), the first boss (5) abuts against the end face of the locking nut (11).

4. A screw-type fixing connector according to claim 3, characterized in that, A set of No. 2 sealing rings (16) is fitted on the end face of the No. 1 boss (5) near the external thread (4). The other end of the No. 2 sealing ring (16) abuts against the end face of the lock nut (11) for sealing the gap between the female head (1) and the lock nut (11).

5. A screw-type fixing connector according to claim 1, characterized in that, A set of No. 3 sealing rings (17) is provided at the abutment of No. 2 boss (10) and No. 3 boss (13). The No. 3 sealing rings (17) are fitted on the side of No. 2 boss (10) away from the small round head (8).

6. A screw-type fixing connector according to claim 2, characterized in that, The inner wall of the groove (2) is provided with a set of chamfers (18). The chamfers (18) are set in a tapering manner from the groove opening of the groove (2) into the groove, which is used to guide the small round head (8) into the groove (2).

7. A screw-type fixing connector according to claim 5, characterized in that, The inner wall of the No. 3 boss (13) is adapted to the outer wall size of the large round head (7).

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