Screw terminal connector

Abstract

The utility model belongs to the technical field of connectors, and particularly relates to a screw terminal connector which comprises a connector body, a wiring end and a nut insert, an assembly cavity is arranged in the nut insert and communicated with a through hole, a clamping block with teeth is arranged in the hole in a sliding mode, a driving rod is in linkage with the clamping block, and when a screw is screwed in, the driving rod drives the clamping block to rotate. The driving rod pushes the clamping block, clamping block teeth to be embedded into the screw and multiple sets of equidistantly-distributed auxiliary fixing mechanisms to apply force in all directions according to cooperation of the inclined faces, the screw is effectively prevented from loosening, rotating or disengaging, the connection stability and reliability are greatly improved, stable current transmission can be guaranteed even under extreme working conditions such as strong vibration and frequent impact, and the service life of the screw is prolonged. Compared with the prior art, the clamping block and the driving rod are reset through the tension spring, dismounting and re-mounting are convenient, the problems that a screw is prone to loosening, stress is uneven, and the fastening effect is poor are solved, and a solid guarantee is provided for reliable operation of electronic equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of connector, specifically a screw terminal connector. BACKGROUND

[0002] As a key component in the field of electrical connection, screw terminal plays an important role in various electronic devices. Whether it is the connection between the sensor and the controller in the industrial automation control system, or the connection between the internal circuit board and the external power line or signal line in household appliances such as smart TVs and energy-saving refrigerators, screw terminal is indispensable.

[0003] The existing screw terminal mainly consists of the following parts: screw cylinder, fixed screw, wire fixing sleeve, conductive plate, etc. Its working principle is as follows: during the fixing process, first, the fixed screw is inserted through the screw cylinder of the screw terminal, then the screw is precisely screwed into the pre-drilled fixing hole of the PCB, and the external wire harness is connected with the wire fixing sleeve, successfully achieving the electrical connection between the external wire harness and the PCB.

[0004] The existing screw terminal connector lacks effective auxiliary fixing means, relying only on the conventional thread cooperation of the nut and screw. In daily use or slight vibration of the equipment, the screw is prone to loosen, rotate or even come out, which greatly reduces the stability of the connector connection, frequently interrupts the electrical connection, and cannot guarantee stable and reliable signal transmission. Therefore, a screw terminal connector is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the shortcomings of the existing screw terminal, a screw terminal connector is proposed.

[0006] The utility model solves the technical problems and adopts the technical scheme: the utility model discloses a screw terminal connector, which comprises a connector body, one end of the connector body is integrally formed with a wiring end through die casting, the other end of the connector body is provided with a riveting hole, a nut insert is assembled in the riveting hole through riveting, a bevel is formed in the inlet of the nut insert, a bending part matched with the external shell is arranged between the wiring end and the nut insert on the connector body, and an auxiliary fixing mechanism for reinforcing the external screw is assembled in the nut insert.

[0007] Preferably, the auxiliary fixing mechanism is equidistantly provided with a plurality of sets, and is arranged around the central axis of the nut insert.

[0008] Preferably, the auxiliary fixing mechanism includes an assembly cavity formed within the nut insert. A through hole communicating with the inner diameter wall of the nut insert is formed on one side of the assembly cavity. A clamping block for fixing a screw is slidably disposed within the through hole. One end of the clamping block near the inner diameter wall of the nut insert has teeth, and the other end of the clamping block has an arc-shaped chamfer. Two opposing first guide grooves are formed on the inner wall of the through hole. First guide blocks cooperating with the first guide grooves are fixedly disposed on both sides of the clamping block. A drive rod for driving the clamping block to clamp the screw is slidably assembled within the assembly cavity. A linkage rod is fixedly disposed on one end of the drive rod near the bevel. A second guide groove is formed on the inner wall of the assembly cavity. A second guide block cooperating with the second guide groove is fixedly disposed on the drive rod. A drive inclined surface cooperating with the arc-shaped chamfer is formed at one end of the drive rod.

[0009] Preferably, the clamping block has an assembly groove at one end opposite to the assembly cavity, and a first tension spring for driving the clamping block to return to its original position is connected between the assembly groove and the assembly cavity. The bottom end of the drive rod has a notch for the first tension spring to pass through.

[0010] Preferably, a second tension spring is connected between one end of the drive rod and the assembly cavity for driving the drive rod to return to its original position.

[0011] Preferably, the mating surface of the linkage rod and the screw has a rounded chamfer.

[0012] Preferably, the inner wall of the terminal is fixedly provided with several annular ribs.

[0013] Preferably, the connector body is made of copper.

[0014] Preferably, the nut insert is made of carbon steel.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model effectively prevents screws from loosening, rotating or coming out through the structural design of the auxiliary fixing mechanism, greatly improving the stability of the screws in the nut insert, ensuring the stability and reliability of the entire connector connection, and making the electrical connection as solid as a rock.

[0017] 2. Multiple sets of auxiliary fixing mechanisms are distributed equidistantly around the central axis, applying force evenly in all directions, so that the screw is stably supported in all directions in three-dimensional space, eliminating problems such as screw skewing caused by uneven force, ensuring long-term stable connection, and even under extreme and complex working conditions such as strong vibration and frequent impact, the screw can still be firmly locked, ensuring stable current transmission, protecting the normal operation of electronic equipment, and enabling it to operate reliably under harsh conditions.

[0018] 3. High efficiency and convenient structure: The screw insertion is automatically linked and responded to. As the screw is tightened, the clamping block automatically increases the clamping force on the screw, strengthens the fastening effect, and greatly improves the installation efficiency. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;

[0022] Figure 3 yes Figure 2 Enlarged view of the structure at point B;

[0023] Figure 4 This is a side view of the auxiliary fixing mechanism in this utility model;

[0024] Legend:

[0025] 1. Connector body; 100. Screw; 101. Chamfer; 2. Terminal; 3. Riveting hole; 4. Nut insert; 5. Bending part; 6. Auxiliary fixing mechanism; 7. Assembly cavity; 8. Through hole; 9. Clamping block; 10. Tooth; 11. First guide groove; 12. First guide block; 13. Drive rod; 14. Bevel; 15. Linkage rod; 16. Second guide groove; 17. Second guide block; 18. Arc chamfer; 19. Drive inclined surface; 20. Assembly groove; 21. First tension spring; 22. Notch; 23. Second tension spring; 24. Rounded chamfer; 25. Annular rib. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Specific implementation examples are given below.

[0028] Please see Figures 1-4The present invention discloses a screw terminal connector, comprising a connector body 1, one end of which is integrally formed by die casting with a terminal 2, and the other end of which is provided with a riveting hole 3. A nut insert 4 is fixedly assembled in the riveting hole 3 by riveting. The entrance of the nut insert 4 is provided with a bevel 14. A bent portion 5 that cooperates with the outer shell is provided on the connector body 1 between the terminal 2 and the nut insert 4. An auxiliary fixing mechanism 6 for reinforcing the fixing of the external screw 100 is assembled in the nut insert 4.

[0029] The auxiliary fixing mechanism 6 includes an assembly cavity 7 formed within the nut insert 4. A through hole 8 communicating with the inner diameter wall of the nut insert 4 is formed on one side of the assembly cavity 7. A clamping block 9 for fixing the screw 100 is slidably disposed within the through hole 8. One end of the clamping block 9 near the inner diameter wall of the nut insert 4 has teeth 10, and the other end has an arc-shaped chamfer 18. Two opposing first guide grooves 11 are formed on the inner wall of the through hole 8. First guide blocks 12, cooperating with the first guide grooves 11, are fixedly disposed on both sides of the clamping block 9. A drive rod 13 for driving the clamping block 9 to clamp the screw 100 is slidably assembled within the assembly cavity 7. A linkage rod 15 is fixedly disposed at one end of the drive rod 13 near the bevel 14. The linkage rod 15 slides through the bevel 14. The mating surface of the linkage rod 15 with the chamfer 101 on the screw 100 has a rounded chamfer 24. The inner wall of the assembly cavity 7 has a second guide groove 16. A second guide block 17 that mates with the second guide groove 16 is fixedly mounted on the drive rod 13. One end of the drive rod 13 has a drive inclined surface 19 that mates with the arc-shaped chamfer 18. During operation, when the external screw 100 begins to screw into the nut insert 4, as the screw 100 gradually screws in, due to the inclined surface mating relationship between the drive inclined surface 19 at one end of the drive rod 13 and the arc-shaped chamfer 18 of the clamping block 9 according to the mechanical design, and based on mechanical principles, the drive rod 13 begins to move along the second guide groove 16 within the assembly cavity 7. Sliding steadily, the second guide groove 16 is opened in a straight line along the inner wall of the assembly cavity 7. Its depth and width are perfectly matched with the second guide block 17 of the drive rod 13, ensuring that the drive rod 13 slides smoothly and controllably. At the same time, the arc chamfer 24 opened on the mating surface of the linkage rod 15 and the chamfer 101 on the screw 100 first makes precise contact with the chamfer 101 of the screw. Based on the contact characteristics of the arc surface and the inclined surface, a smooth transition can be achieved, effectively dispersing the contact stress and avoiding component wear or jamming caused by stress concentration. At the same time, it provides precise lateral guidance for the screw 100 to be screwed in. The linear displacement of the drive rod 13 then pushes the clamping block 9 along the through hole 8, which is like a "track and wheel" between the first guide groove 11 and the first guide blocks 12 on both sides of the clamping block 9. The sliding path is precisely defined, and it moves precisely towards the inner diameter wall of the nut insert 4. The end of the clamping block 9 near the inner diameter wall is made of high hardness and wear-resistant metal material and has teeth 10 that are similar in shape to sharp serrations. After contacting the screw 100, it deeply embeds itself into the screw surface due to its own characteristics, forming a strong constraint on the screw 100 from multiple directions, restricting the subsequent loosening, rotation or dislodgement of the screw, ensuring that the screw 100 is firmly fixed in the nut insert 4, and improving the stability and reliability of the connection. When the screw 100 is screwed into the nut insert 4 at the end of the thread stroke, the auxiliary fixing mechanism 6 is linked to assist in fixing the screw 100. The tighter the screw 100 is screwed, the greater the pressure applied to the screw 100 by the clamping block 9 in the auxiliary fixing mechanism 6.Furthermore, the structure of the nut insert 4 also serves to assist in supporting the screw 100 when it is screwed in. Through the ingenious structure of the auxiliary fixing mechanism 6, the screwing in of the screw 100 is linked and self-responsive, greatly enhancing the fastening effect. Even under complex and changing working conditions, such as strong vibration and frequent impacts, the electrical connection remains highly reliable, effectively resisting the risk of screw loosening caused by various factors, ensuring continuous and stable current transmission, and laying a solid foundation for the normal operation of electronic equipment.

[0030] Furthermore, the auxiliary fixing mechanism 6 is arranged in multiple groups at equal intervals, all around the central axis of the nut insert 4. During operation, when the screw 100 is screwed into the nut insert 4, the auxiliary fixing mechanism 6 is evenly distributed and multiple groups are evenly arranged, and all groups are strictly arranged symmetrically around the central axis of the nut insert 4, forming a comprehensive and balanced fixing system. The clamping blocks 9 in each position move towards the screw 100 simultaneously under the synchronous drive of the corresponding drive rod 13. The structure of each group of auxiliary fixing mechanisms 6 is completely identical, and each group includes a precision structure that guides the clamping blocks 9 from the assembly cavity 7 through the through hole 8. Based on the principle of mechanical balance, multiple groups of mechanisms work together to apply clamping force to the screw 100 evenly from all angles, ensuring that the screw 100 can be stably and evenly supported in every direction in three-dimensional space. This allows the screw 100 to always be in a balanced and stable clamping state under complex stress conditions, effectively avoiding problems such as screw skewing, loosening, or even falling out due to uneven local stress.

[0031] Furthermore, an assembly groove 20 is provided at one end of the clamping block 9 opposite to the assembly cavity 7. A first tension spring 21 for driving the clamping block 9 to return to its original position is connected between the assembly groove 20 and the assembly cavity 7. A notch 22 for the first tension spring 21 to pass through is provided at the bottom end of the drive rod 13. A second tension spring 23 for driving the drive rod 13 to return to its original position is connected between one end of the drive rod 13 and the assembly cavity 7. During operation, when the screw 100 is disassembled, as the screw 100 is gradually screwed outward, the screw chamfer 101 on the screw 100 gradually stops contacting the linkage rod 15, and the squeezing force on the clamping block 9 and the drive rod 13 gradually decreases. At this time, the first tension spring 21 fixed at one end of the clamping block 9 utilizes its stored elastic potential energy. Pull the clamping block 9 smoothly back to its original position along the through hole 8 away from the inner diameter wall of the nut insert 4. The through hole 8 provides a precise retraction path for the clamping block 9, and its diameter is precisely matched with the outer dimensions of the clamping block 9 to ensure smooth sliding and return to the initial standby state. At the same time, one end of the drive rod 13 is connected to the assembly cavity 7 by the second tension spring 23, which also exerts force, pulling the drive rod 13 smoothly back in the opposite direction along the second guide groove 16 in the assembly cavity 7, and also returning to the initial position. The bottom end of the drive rod 13 is specially provided with a notch 22 for the first tension spring 21 to pass through, which not only ensures that the first tension spring 21 passes through smoothly, but also does not affect the normal structural strength and operation of the drive rod 13. The two work together tacitly to facilitate the smooth installation of the screw 100 next time.

[0032] Furthermore, the inner wall of the terminal 2 is fixedly provided with several annular ribs 25. During operation, when the external wire harness is inserted into the terminal 2, a certain pressure is applied to the terminal 2 using a tool, causing the terminal 2 to deform. At this time, the annular ribs 25 will deform synchronously with the deformation of the terminal 2, causing the annular ribs 25 to press towards the wire harness, applying additional compressive force to the wire harness. After the wire harness feels the compressive force of the annular ribs 25, the friction between the wire harness and the inner wall of the terminal 2 further increases, greatly improving the connection firmness of the wire harness. This ensures that the electrical connection between the wire harness and the terminal 2 remains stable and reliable under complex working conditions, effectively preventing the wire harness from loosening or shifting due to external forces such as equipment vibration and pulling, thereby significantly reducing the incidence of electrical faults caused by poor contact.

[0033] Furthermore, the connector body 1 is made of copper, and the nut insert 4 is made of carbon steel. During operation, the connector body 1 is made of copper, which fully utilizes the excellent conductivity of copper. Electrons can move freely and quickly inside the copper connector body 1, ensuring that the quality of electrical signals is not damaged during transmission and maintaining signal stability and clarity. The carbon steel nut insert 4, relying on its strong mechanical strength, can withstand the huge pressure when the screw 100 is screwed in, as well as the external impacts such as vibration and tension from all directions during equipment operation. This provides a stable and reliable support foundation for the entire connector structure, ensuring that each component can maintain its relative position stability under stress and does not deform or loosen.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A screw terminal connector, characterized in that: The connector body (1) includes a connector body (1), one end of which is integrally formed by die casting with a terminal (2), and the other end of which is provided with a riveting hole (3). A nut insert (4) is fixedly assembled in the riveting hole (3) by riveting. The nut insert (4) has a bevel (14) at its entrance. A bent part (5) that cooperates with the outer shell is provided on the connector body (1) between the terminal (2) and the nut insert (4). An auxiliary fixing mechanism (6) for strengthening the fixing of the external screw (100) is assembled in the nut insert (4).

2. A screw terminal connector according to claim 1, characterized in that: The auxiliary fixing mechanism (6) is provided with an array of equal-distance arrays, all of which are arranged around the central axis of the nut insert (4).

3. A screw terminal connector according to claim 1, characterized in that: The auxiliary fixing mechanism (6) includes an assembly cavity (7) opened in the nut insert (4). A through hole (8) communicating with the inner diameter wall of the nut insert (4) is opened on one side of the assembly cavity (7). A clamping block (9) for fixing the screw (100) is slidably arranged in the through hole (8). The clamping block (9) is provided with teeth (10) at one end near the inner diameter wall of the nut insert (4). An arc-shaped chamfer (18) is opened at the other end of the clamping block (9). Two first guide grooves (11) are opened opposite each other on the inner wall of the through hole (8). The clamping block (9) is fixedly provided with first guide grooves (11) on both sides. The first guide block (12) is assembled. A drive rod (13) for driving the clamping block (9) to clamp the screw (100) is slidably assembled in the assembly cavity (7). A linkage rod (15) is fixedly provided at one end of the drive rod (13) near the bevel (14). The linkage rod (15) slides through the bevel (14). A second guide groove (16) is provided on the inner wall of the assembly cavity (7). A second guide block (17) that cooperates with the second guide groove (16) is fixedly provided on the drive rod (13). A drive inclined surface (19) that cooperates with the arc chamfer (18) is provided at one end of the drive rod (13).

4. A screw terminal connector according to claim 3, characterized in that: An assembly groove (20) is provided at one end of the clamping block (9) opposite to the assembly cavity (7). A first tension spring (21) for driving the clamping block (9) to return to its original position is connected between the assembly groove (20) and the assembly cavity (7). A notch (22) is provided at the bottom end of the driving rod (13) for the first tension spring (21) to pass through.

5. A screw terminal connector according to claim 3, characterized in that: One end of the drive rod (13) is connected to the assembly cavity (7) with a second tension spring (23) for driving the drive rod (13) to return to its original position.

6. A screw terminal connector according to claim 3, characterized in that: The mating surface of the linkage rod (15) and the chamfer (101) on the screw (100) is provided with an arc chamfer (24).

7. A screw terminal connector according to claim 1, characterized in that: The inner wall of the terminal (2) is fixedly provided with several annular ribs (25).

8. A screw terminal connector according to claim 1, characterized in that: The connector body (1) is made of copper.

9. A screw terminal connector according to claim 1, characterized in that: The nut insert (4) is made of carbon steel.

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