Crimping-free double-end wiring terminal

Abstract

The invention relates to the technical field of conductive connecting pieces, in particular to a crimping-free double-end wiring terminal which comprises a mounting base, two sealing plates, two sleeves, a locking piece and a connecting piece, mounting holes penetrating through the two sides are formed in the mounting base, the two sealing plates are arranged on the two sides of the mounting base respectively, and the two sleeves are arranged on the two sides of the mounting base respectively. The two sleeves are coaxially connected into the mounting holes in a sliding manner; according to the invention, the mounting seat, the sleeve, the reed and the plurality of locking pieces are arranged, the sleeve is pushed to slide into the mounting hole by applying thrust on the wire, the sleeve drives the plurality of locking pieces to gather towards the center of the sleeve through the reed, and the locking pieces gather towards the center of the sleeve until the inner side walls of the locking pieces are attached to the outer side wall of the wire core. In the connection process, a pressurization tool and a locking tool are not needed, connection can be completed only by inserting the electric wire into the mounting hole, the connection process of the electric wire and the double-end wiring terminal is simplified, and site construction is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of conductive connectors, in particular to a crimp-free double-head terminal. Background Art

[0002] A double-ended terminal is a terminal with two wiring holes or wiring points. The double-ended terminal allows two wires to be connected to the same terminal at the same time. In conventional double-ended terminals, the wires are usually connected to the terminal by crimping. The crimping connection method relies on compressing the terminal to tightly include the wire, thereby ensuring the stability and reliability of the wire and the double-ended terminal. However, during the crimping process, the double-ended terminal is in plastic deformation, which is an irreversible deformation, that is, the double-ended terminal cannot be recycled after completing the connection with the wire, and the wire core part crimped with the double-ended terminal cannot be used again. At the same time, crimping requires special crimping tools to complete the crimping connection between the wire and the double-ended terminal.

[0003] For this purpose, a crimp-free double-ended terminal block has been derived. This type of double-ended terminal block is designed to achieve the connection between the wire and the double-ended terminal block by mechanical clamping or bolt fixing, so that no professional crimping tools are required for crimping operations, and this type of double-ended terminal block is detachable and reusable; for example, the invention patent with application number 202210905675.5 provides a crimp-free detachable terminal block, which realizes the surface pressure connection between the wire and the terminal block by using the tapered hole inside the crimping sleeve to press the end of the crimping tube to the wire, and realizes the rapid replacement of the terminal block and the reuse of the terminal block after disassembly; however, a large number of transmission components and fasteners are provided in this technical scheme. At the same time, the structural components in this technical scheme are relatively complex, and the processing cost is high. When the wires and the double-ended terminal block are connected, they need to be locked by bolts, which is not conducive to on-site construction. For example, the utility model patent with patent application number 202321585434.3 provides a crimp-free terminal structure. The utility model sets an elastic member in the terminal, and the elastic member is set between the conductive plate and the elastic wire fixing mechanism. The elastic member can drive the elastic wire fixing mechanism to move in the direction of the smaller radius in the first conductive part under the push of the conductive plate, thereby locking the wire body and completing the connection between the wire and the terminal. The utility model also uses bolt tightening for locking, which is not conducive to on-site construction. At the same time, this technical solution is more difficult to process in double-headed terminals. Summary of the invention

[0004] The purpose of the present invention is to provide a crimp-free double-ended terminal to solve the problem that the traditional crimp-type double-ended terminal cannot be reused, and at the same time solve the problems existing in the existing crimp-free double-ended terminal technical solution.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A crimp-free double-ended terminal comprises a mounting seat, a sealing plate, a sleeve, a locking piece and a connecting piece, wherein the mounting seat is provided with mounting holes penetrating both sides, the sealing plate and the sleeve are 2 in number, the two sealing plates are respectively arranged on both sides of the mounting seat, the sealing plate is provided with a wire hole coaxial with the mounting hole, the two sleeves are coaxially slidably connected in the mounting hole, the locking piece is arc-shaped, and at least two locking pieces are coaxially arranged in each sleeve, the multiple locking pieces in the sleeve are arranged in a ring array, the inner diameter of the locking piece is D1, the diameter of the wire core is D2, the inner diameter of the sleeve is D3, The outer diameter of the wire skin is D4, wherein 0.5mm≤D1-D2≤2mm, D3<D4, the corresponding locking pieces in the two sleeves are connected by a connecting piece, the connecting piece is fixedly connected to the mounting seat, the locking piece and the connecting piece are both made of conductive material, a driving component and a limiting component are provided on the sleeve, the driving component is designed so that when the wire skin pushes the sleeve to slide into the mounting hole, the sleeve drives multiple locking pieces to gather toward the center of the sleeve through the driving component, and the limiting component is designed so that after the sleeve slides into the mounting hole to a set distance, the limiting component limits the sleeve from sliding out of the mounting hole.

[0007] Through the arrangement of the mounting seat and the sleeve, when connecting the electric wire and the double-ended terminal, after the wire sheath at one end of the electric wire is stripped, one end of the exposed wire core on the electric wire is inserted into the mounting hole. During the process of inserting the electric wire into the mounting hole, the wire core is inserted into the sleeve and inserted between the multiple locking pieces on this side. Since the relationship between the outer diameter D4 of the wire sheath and the inner diameter D3 of the sleeve is D3<D4, the wire sheath cannot be inserted into the sleeve. After the end face of the wire sheath abuts against the end face of the sleeve, the electric wire continues to move toward the middle of the mounting seat, and the sleeve follows the wire sheath to move into the mounting hole. Combined with the arrangement of the driving component, when the wire sheath pushes the sleeve to slide into the mounting hole, the sleeve drives the multiple locking pieces to gather toward the center of the sleeve through the driving component. As the sleeve continues to slide into the mounting hole, the locking pieces gather toward the center of the sleeve until the inner side wall of the locking piece fits with the outer side wall of the wire core, thereby completing the connection between the electric wire and one end of the double-ended terminal. The connection between the other end of the double-ended terminal and the electric wire can be carried out in the same way as described above. ; Further, through the setting of the limit assembly, when the sleeve moves into the mounting hole to a set distance, the limit assembly limits the sleeve from sliding out of the mounting hole, thereby preventing the sleeve from actively withdrawing from the mounting hole in a natural state, thereby ensuring that the locking piece and the wire core remain in contact, and the wires, locking pieces and connecting pieces on both sides remain in a conductive state, ensuring stability during the conductive process; during the connection process, no pressurizing tool and locking tool are required, and the locking can be completed by simply inserting the wire into the mounting hole, which simplifies the connection process between the wire and the double-headed terminal and facilitates on-site construction; further, due to the relationship between the inner diameter D1 of the locking piece and the outer diameter D2 of the wire core, and the locking piece is a multi-piece structure, after the locking piece is connected to the wire core, there is a gap between the locking piece, and there is also a gap between the locking piece and the sleeve, and the heat generated when the locking piece and the exposed wire core are energized can be discharged through the above-mentioned gap, avoiding the generation of high temperature between the locking piece and the wire core, and ensuring the safety and service life of the double-headed terminal.

[0008] Optionally, the driving assembly can be a wedge-shaped structure, a connecting rod structure or a linear actuator, and the above three structural components can all realize the conversion of the linear motion of the sleeve into an inward convergence force of multiple locking plates; however, after the wire core is inserted between the sleeve and the locking plate, the wire is pushed to move toward the middle of the mounting hole, and the sleeve converges the multiple locking plates toward the center of the sleeve through the wedge-shaped structure or the connecting rod structure, until the inner side wall of the locking plate fits with the outer side wall of the wire core, the sleeve cannot be pushed further due to the rigid contact between the locking plate and the wire core, and the thrust applied to the wire and the sleeve reaches the maximum at this time. The limit assembly limits the sleeve and can also achieve the connection between the wire core and the locking piece. However, there is no pressure margin between the locking piece and the wire core. In a vibration environment or when the wire is pulled by the outside, it is easy to cause relative sliding or even separation between the locking piece and the wire core, which is not conducive to the connection stability between the wire and the double-headed terminal. Although the linear actuator can provide a pressure margin, the linear actuator needs to be equipped with additional power, which is not conducive to the production of the double-headed terminal and will increase the production cost of the double-headed terminal. Therefore, the above three schemes are not preferred schemes for the drive assembly in the present invention.

[0009] Preferably, the driving assembly includes a spring sheet, a plurality of limit grooves are provided on the inner side wall of the mounting hole, and the plurality of limit grooves correspond to the plurality of locking pieces one by one respectively, the limit groove is a non-through groove, the limit groove includes an open end and a limit end, the open end passes through the front end or the rear end of the mounting seat, the limit end is located in the mounting seat, and the two sleeves are provided with a plurality of avoidance grooves, and the plurality of avoidance grooves correspond to the plurality of locking pieces one by one respectively, one end of the avoidance groove passes through a side of the sleeve close to the limit end, and the other end does not pass through the sleeve, and the outer side wall of the sleeve is also provided with a plurality of limit protrusions, the plurality of limit protrusions correspond to the plurality of limit protrusions one by one, and the limit protrusions are located on the side where the avoidance groove does not pass through the sleeve, the limit protrusion is slidably connected to the limit groove, the spring sheet is arc-shaped, one end of the spring sheet is connected to the limit end, and the other end is connected to the limit protrusion, and the arc-shaped side wall of the spring sheet abuts against the outer side wall of the locking piece.

[0010] When connecting the wire and the double-ended terminal, after the wire core is inserted between the sleeve and the locking piece, the wire is pushed to move toward the middle of the mounting hole, and the sleeve moves toward the middle of the mounting hole following the wire under the action of the driving force; during the process, the limiting protrusion slides in the limiting groove, and the spacing between the limiting protrusion and the limiting section gradually decreases, the spring leaf is gradually compressed, the curvature of the spring leaf becomes smaller, and the arc length of the spring leaf extending into the avoidance groove increases, and as the wire continues to be inserted, the connecting piece and the locking piece gradually gather toward the center of the sleeve under the push of the spring leaf. , until the inner wall of the locking piece abuts against the outer wall of the wire core, and the wire core and the locking piece are in a conductive state; continue to push the wire to move toward the middle of the mounting hole, the spring piece continues to be compressed, and the thrust applied by the spring piece on the connecting piece and the locking piece gradually increases, and the contact area of ​​the spring piece with the locking piece gradually increases, so that there is a margin of pressure applied by the spring piece on the locking piece, avoiding sliding or separation between the wire core and the locking piece under a vibration environment or the pulling of the outer wall on the wire, thereby ensuring the connection stability and safety between the wire and the double-end terminal.

[0011] Optionally, the limit assembly may be an electromagnet, a bolt or a plug structure. All of the above three structures can complete the position limitation between the sleeve and the mounting base, but the electromagnet requires an additional power system to be set on the double-end terminal, which increases the production cost of the double-end terminal, and is not a preferred solution for the limit assembly in the present invention; while the bolt or plug-in structure does not require an additional power system to be set, and has a lower structural cost, but both the bolt and the plug structure require a positioning structure to be set on the sleeve. During the connection process, the construction worker needs to press the wire with one hand and find the positioning structure on the sleeve with the other hand to insert the bolt or plug to complete the limitation, which is not conducive to the on-site operation of the construction workers. Therefore, these two solutions are not preferred solutions for the limit assembly in the present invention.

[0012] Preferably, the limiting assembly includes a buckle, and four guide grooves are provided on the inner side wall of the mounting hole, and the four guide grooves completely penetrate the mounting seat and are symmetrical to each other. Four buckles are provided on the outer side walls of the two sleeves, and the four buckles are respectively slidably installed in the four guide grooves. The buckle includes a connecting end, a swing section and a hook ear portion, and the buckle is in a "Z" shape. The swing portion is located between the connecting end and the hook ear portion and is elastic. The connecting end is connected to the sleeve, and the hook ear portion is slidably connected to the guide groove. Two mounting grooves are provided on the middle side wall of the mounting seat, and the two mounting grooves are symmetrical to each other, and the two mounting grooves are respectively connected to the two guide grooves.

[0013] When connecting the wire to the double-ended terminal, after the wire core is inserted between the sleeve and the locking piece, the wire is pushed to move toward the middle of the mounting hole. The sleeve follows the wire to move toward the middle of the mounting hole under the action of the driving force. The buckle slides in the guide groove, and the distance between the hook ear and the mounting groove gradually decreases. As the wire continues to be inserted, the fitting area between the spring sheet and the locking piece gradually increases until the hook ear reaches the position where the guide groove and the mounting groove are connected. The hook ear loses the limiting constraint of the side wall of the guide groove, and the swinging part releases its elastic potential energy and swings. The hook ear swings following the swinging part and is embedded in the mounting groove, releasing the thrust applied to the wire. Under the action of the elastic potential energy of the spring sheet, the hook ear It fits with the side wall of the installation groove, and the hook ear part and the mounting seat are in a locked state, which limits the movement of the sleeve out of the mounting hole, thereby completing the limitation of the sleeve; through the arrangement of the buckle, the guide groove and the mounting groove, there is no need to add a power device, and there is no need to position the sleeve during the connection process of the wire and the double-headed terminal, which is convenient for on-site construction by construction personnel; at the same time, when the sleeve and the mounting seat are limited, the hook ear part is located in the mounting groove, that is, the hook ear part is located in the mounting seat, and there are four hook ears on one side of the sleeve, which prevents construction personnel or other personnel from accidentally touching the hook ear part and releasing the limitation between the sleeve and the mounting seat, resulting in failure of the connection between the wire and the double-headed terminal; the connection stability and safety between the wire and the double-headed terminal and the wire are guaranteed.

[0014] Preferably, a plurality of latch teeth are provided on the inner side wall of the locking piece, and the annular cross section of each latch tooth is in the shape of a cone, and the large end is located on the side away from the limiting end, and two adjacent latch teeth are connected head to tail. By providing the latch teeth with an annular cross section in the shape of a cone, and the large end of the annular cross section of the latch teeth is located on the side away from the limiting end, when the locking piece abuts against the wire core, under the pressure of the spring sheet, the latch teeth abut against the wire core, and when the wire is subjected to a pulling force toward the outside of the mounting hole, the latch teeth are embedded in the wire core to avoid relative displacement between the wire core and the locking piece, thereby ensuring the connection stability and safety between the wire and the double-headed terminal and the wire; further, the inner side wall of the locking piece is in the shape of a cone with a large front end and a small rear end, and when the wire core is inserted between the plurality of locking pieces, the inner side wall of the locking piece has a guiding effect on the wire core, which facilitates the insertion of the wire core between the plurality of locking pieces, avoids the displacement of the wire core, and facilitates on-site construction.

[0015] Preferably, buttons are provided in both installation grooves, the depth of the installation groove is H1, the length of the hook ear portion is L1, and the installation depth of the button is H2, wherein L1+H2≤H1. When releasing the connection between the wire and the double-ended wiring terminal, since the multiple hook ears are all located in the installation groove, the construction personnel need to use a screwdriver or a stick-like object to insert into the installation groove to push the hook ears out of the installation groove. Since the installation grooves are provided on both sides of the mounting seat, it is not easy to push all the hook ears in the two installation grooves out of the installation grooves at the same time. For this reason, by arranging a button in the installation groove, when connecting the wire to the double-ended wiring terminal, it is only necessary to press the buttons on both sides at the same time to push the multiple hook ears out of the installation groove. The sleeve moves toward the outside of the mounting hole under the elastic force of the spring, thereby completing the connection release between the wire and the double-ended wiring terminal, which is convenient for the on-site construction of the construction personnel. Furthermore, the relationship between the depth H1 of the installation groove, the length L1 of the hook ear, and the installation depth H2 of the button is L1+H2≤H1, that is, the button is sunk into the installation groove in a natural state, which avoids the construction personnel or other personnel accidentally touching the button to release the limit between the sleeve and the mounting seat, resulting in failure of the connection between the wire and the double-ended wiring terminal; the connection stability and safety between the wire and the double-ended wiring terminal and the wire are ensured.

[0016] Preferably, a return spring is coaxially arranged in the mounting hole, and the two ends of the return spring are respectively connected to the sleeves on both sides, and the return spring is in a compressed state when the sleeves on both sides abut against the sealing plate. By setting the return spring, the return response speed of the sleeve after the wire and the double-head terminal are disconnected is improved, so as not to affect the construction efficiency on site; at the same time, under the elastic force of the return spring, when the double-head terminal is not connected to the wire, the sleeve is kept in contact with the sealing plate under the elastic force of the return spring, ensuring that the multiple locking pieces are in the maximum inner diameter state in the initial state; further, the setting of the return spring plays a role of shock absorption and buffering, and the spring force applied by the return spring on the sleeve ensures the contact state of the hook ear part and the mounting groove, avoiding the risk of the hook ear part being separated from the mounting groove due to the influence of environmental vibration during the connection process between the wire and the double-head terminal, and ensuring the connection stability and safety between the wire and the double-head terminal and the wire.

[0017] Preferably, the arc-shaped side wall of the spring is coated with an insulating coating, and the thickness of the insulating layer is 0.1 mm to 0.3 mm. By coating the arc-shaped side wall of the spring with an insulating layer, electrical connection between the spring and the locking piece or the connecting piece is avoided, thereby avoiding the generation of current and heating inside the spring, ensuring that the spring is not affected by the heat of the current and the elasticity of the spring, thereby ensuring the connection stability and safety between the wire and the double-head terminal and the wire.

[0018] Preferably, the mounting seat, sleeve, sealing plate and button are all made of any one of PVC, PC, ABS or PAN, and the flame retardant performance is not less than V-0 level. One end of the exposed wire core of the wires on both sides is located inside the mounting seat and the sleeve, and as the wires are inserted into the middle of the mounting hole, the exposed wire core is located in the middle of the mounting seat, and the locking piece and the connecting piece are both located inside the mounting seat to prevent the wires on both sides from being accidentally touched by the staff when the power is on, thereby ensuring the safety of the connection of the wires on both sides. Even if the wires on both sides generate sparks at the connection due to overload, the sparks cannot penetrate the mounting seat, sleeve, sealing plate and button with flame retardant performance.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention provides a mounting seat, a sleeve, a spring and a plurality of locking pieces, and applies a thrust on the wire to push the sleeve to slide into the mounting hole. The sleeve drives the plurality of locking pieces to gather toward the center of the sleeve through the spring. The locking pieces gather toward the center of the sleeve until the inner side wall of the locking piece fits with the outer side wall of the wire core, thereby completing the connection between the wire and one end of the double-ended terminal. During the connection process, there is no need to use a pressurizing tool or a locking tool. The connection can be completed by simply inserting the wire into the mounting hole, which simplifies the connection process between the wire and the double-ended terminal and facilitates on-site construction.

[0021] 2. The present invention also provides a buckle on the sleeve and a mounting groove on the mounting seat. After the sleeve drives the locking piece to fit the wire core through the spring, the sleeve continues to be pushed until the buckle is embedded in the mounting groove, thereby completing the position restriction between the sleeve and the mounting seat, facilitating on-site construction by construction personnel, and at the same time ensuring the pressure applied by the spring on the locking piece, thereby ensuring the connection stability and safety between the wire and the double-head terminal and the wire.

[0022] 3. The present invention arranges a plurality of latching teeth on the locking plate. When the locking plate abuts against the wire core, the latching teeth abut against the wire core under the pressure of the spring. When the wire is subjected to a pulling force toward the outside of the mounting hole, the latching teeth are embedded in the wire core to avoid relative displacement between the wire core and the locking plate, thereby ensuring the connection stability and safety between the wire and the double-head terminal and the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the double-ended terminal block without crimping of the present invention;

[0024] Figure 2 An exploded view of the crimp-free double-end terminal block of the present invention;

[0025] Figure 3 It is a right side view of the crimp-free double-end terminal block of the present invention;

[0026] Figure 4 for Figure 3 Sectional view at AA;

[0027] Figure 5 for Figure 3 Cross-sectional view at BB;

[0028] Figure 6 It is a schematic diagram of the state of the spring when the crimp-free double-ended terminal block of the present invention locks the wire;

[0029] Figure 7 It is a schematic diagram of the buckle state of the crimp-free double-ended terminal block of the present invention when locking the wire;

[0030] Figure 8 The figure is a schematic diagram of the overall structure of the locking piece and the connecting piece in the crimp-free double-ended terminal block of the present invention.

[0031] In the figure: 1. mounting seat; 101. mounting hole; 102. positioning groove; 103. limiting groove; 1031. open end; 1032. limiting end; 104. guide groove; 105. mounting groove; 2. sleeve; 201. positioning protrusion; 202. limiting protrusion; 203. avoidance groove; 204. buckle; 2041. connecting end; 2042. swinging part; 2043. hook ear part; 3. locking piece; 301. latch tooth; 4. connecting piece; 5. sealing plate; 501. wire hole; 6. spring; 7. reset spring; 8. button; 9. wire; 901. wire core; 902. wire sheath; S1. locking direction; S2. unlocking direction. DETAILED DESCRIPTION

[0032] See also Figures 1 to 8 The present invention provides a double-ended terminal block free of crimping, and the technical solution is as follows:

[0033] See also Figure 1 and Figure 2A crimp-free double-head terminal comprises a mounting seat 1, a sealing plate 5, a sleeve 2, a locking piece 3 and a connecting piece 4, wherein the mounting seat 1 is a rectangular parallelepiped structure, a completely penetrating mounting hole 101 is provided in the length direction of the mounting seat 1, the number of the sealing plates 5 is 2, the two sealing plates 5 are respectively arranged on both sides of the length direction of the mounting seat 1, and the sealing plate 5 is provided with a wire hole 501 coaxial with the mounting hole 101; the number of the sleeves 2 is 2, the two sleeves 2 are coaxially slidably connected in the mounting hole 101, and positioning grooves 102 are provided on the inner walls on the upper and lower sides of the mounting hole 101, and the positioning grooves 102 completely penetrate the mounting seat 1 in the length direction, and the outer side walls of the two sleeves 2 are provided with positioning protrusions 201 adapted to the positioning grooves 102, and the positioning protrusions 201 slide Connected in the positioning groove 102, a return spring 7 is coaxially arranged in the mounting hole 101, and the two ends of the return spring 7 are respectively connected to the sleeves 2 on both sides, and the return spring 7 is in a compressed state when the sleeves 2 on both sides abut against the sealing plate 5; the locking piece 3 is arc-shaped, and two locking pieces 3 are coaxially arranged in each of the sleeves 2, and the two locking pieces 3 in the sleeve 2 are arranged in an annular array and are symmetrical on the left and right. The corresponding locking pieces 3 in the two sleeves 2 are connected by a connecting piece 4, and the connecting piece 4 is fixedly connected to the mounting seat 1. The locking piece 3 and the connecting piece 4 are both made of conductive material, and a plurality of latch teeth 301 are provided on the inner side wall of the locking piece 3, and the annular cross-section of each of the latch teeth 301 is frustum-shaped, and two adjacent latch teeth 301 are connected head to tail.

[0034] For further information, see Figures 2 to 5 , four limiting grooves 103 are provided on the inner side wall of the mounting hole 101, and the four limiting grooves 103 correspond to the four locking pieces 3 respectively. The limiting grooves 103 are non-penetrating grooves, and the limiting grooves 103 include an open end 1031 and a limiting end 1032. The open end 1031 passes through both sides of the mounting seat 1 in the length direction, and the limiting end 1032 is located in the mounting seat 1; a plurality of avoidance grooves 203 are provided on the two sleeves 2, and the plurality of avoidance grooves 203 correspond to the plurality of locking pieces 3 respectively. One end of the avoidance groove 203 passes through one side of the sleeve 2 close to the limiting end, and the other end does not pass through the sleeve 2. A plurality of limiting protrusions 202 are also provided on the outer wall of the tube 2, and the plurality of limiting protrusions 202 correspond one-to-one to the plurality of limiting grooves 103, and the limiting protrusions 202 are located on the side where the avoidance groove 203 does not penetrate the sleeve 2, and the limiting protrusions 202 are slidably connected to the limiting grooves 103; a spring leaf 6 is provided in each of the four limiting grooves 103, one end of the spring leaf 6 is connected to the limiting end 1032, and the other end is connected to the limiting protrusion 202, the spring leaf 6 is arc-shaped, and the arc-shaped side wall of the spring leaf 6 abuts against the outer wall of the locking piece 3, and the arc-shaped side wall of the spring leaf 6 is coated with an insulating coating, and the thickness of the insulating layer is 0.1mm to 0.3mm.

[0035] For further information, see Figures 2 to 5 , four guide grooves 104 are provided on the inner side wall of the mounting hole 101, the four guide grooves 104 completely penetrate the mounting seat 1, and the four guide grooves 104 are symmetrical to each other, four buckles 204 are provided on the outer side walls of the two sleeves 2, and the four buckles 204 are respectively slidably installed in the four guide grooves 104, the buckles 204 include a connecting end 2041, a swing section and a hook ear portion 2043, and the buckles 204 are in a "Z" shape, The swinging portion 2042 is located between the connecting end 2041 and the hook ear portion 2043 and is elastic. The connecting end 2041 is connected to the sleeve 2, and the hook ear portion 2043 is slidably connected to the guide groove 104. Two mounting grooves 105 are opened on the middle side wall of the mounting seat 1. The two mounting grooves 105 are symmetrical to each other, and the two mounting grooves 105 are respectively connected to the two guide grooves 104, and buttons 8 are arranged in the two mounting grooves 105.

[0036] Taking a copper core wire with a cross-sectional area of ​​16 square millimeters as an example, the rated voltage is 220V, the diameter of the wire core 901 is D2=4.51mm, the wire sheath 902 is made of PVC, the thickness of the wire sheath 902 is B=1.5mm, that is, the outer diameter of the wire sheath 902 is D4=7.51mm, the inner diameter of the locking piece 3 is D1=5mm, the inner diameter of the sleeve 2 is D3=7mm, the inner diameter of the wire hole 501 is D5=8mm, the depth of the installation groove 105 is H1=5mm, the length of the hook ear 2043 is L1=1.5mm, and the installation depth of the button 8 is H2=3mm; the mounting seat 1, sleeve 2, sealing plate 5 and button 8 are all made of PVC material, and the flame retardant performance is not lower than V-0 level; the reed 6 is made of 17-7PH.

[0037] How it works: See Figures 1 to 8When wiring, the wire sheath 902 at one end of the wire 9 is stripped off to expose the wire core 901. The stripped length of the wire sheath 902 is the same as the length of the limiting groove 103. One end of the exposed wire core 901 is inserted into the mounting hole 101 from the front end of the mounting seat 1 along the S1 direction. As the wire core 901 continues to move into the mounting hole 101, the wire core 901 is inserted into the sleeve 2 and inserted between the two locking pieces 3. At this time, the wire core 901 and the inner side wall of the locking piece 3 are in a non-contact state; until the end face of the wire sheath 902 abuts against the end face of the sleeve 2, the wire 9 continues to be pushed into the mounting hole 101. The sleeve 2 follows the wire 9 to move under the action of the driving force. The middle part of the mounting hole 101 moves. During the process, the limiting protrusion 202 slides in the limiting groove 103, and the distance between the limiting protrusion 202 and the limiting end 1032 gradually decreases, the buckle 204 slides in the guide groove 104, and the distance between the hook ear portion 2043 and the mounting groove 105 gradually decreases, the reset spring 7 is gradually compressed, the elastic potential energy of the reset spring 7 increases, the reed 6 is gradually compressed, the arc of the reed 6 becomes smaller, the arc length of the reed 6 extending into the avoidance groove 203 becomes larger, and abuts against the connecting piece 4. The connecting piece 4 and the locking piece 3 gradually gather toward the center of the sleeve 2 under the push of the reed 6 until the locking piece 3 The inner wall of the wire core 901 abuts against the outer wall of the wire core 901, and the wire core 901, the locking piece 3 on the front side, the connecting piece 4 and the locking piece 3 on the rear side are connected; the wire 9 continues to be pushed along the direction S1, the spring 6 continues to be compressed, and the thrust applied by the spring 6 to the connecting piece 4 and the locking piece 3 gradually increases, and the spring 6 is converted from a state tangent to the connecting piece 4 to a state of being in contact with the connecting piece 4, until the hook ear portion 2043 reaches the position where the guide groove 104 and the installation groove 105 pass through, the hook ear portion 2043 loses the limit constraint of the side wall of the guide groove 104, the elastic potential energy of the swinging portion 2042 is released, and the hook ear portion 2043 swings following the swinging portion 2042, And embedded in the mounting groove 105; the thrust applied to the wire 9 is released, and under the action of the elastic potential energy of the reset spring 7 and the reed 6, the hook ear portion 2043 fits against the side wall of the mounting groove 105, and the hook ear portion 2043 and the mounting seat 1 are in a locked state, limiting the movement of the sleeve 2 from the current position to the opposite direction of S1, thereby completing the connection between the crimp-free double-head terminal and the front wire 9; the difference in the connection process between the other side wire 9 and the crimp-free double-head terminal is: when wiring, one end of the exposed wire core 901 needs to be inserted into the mounting hole 101 from the rear end of the mounting seat 1 along the opposite direction of S1, and the rest of the process is similar and will not be repeated here.

[0038] When unlocking, the buttons 8 on the left and right sides are pressed at the same time, wherein the right button 8 moves in the direction of S2 and the left button 8 moves in the opposite direction of S2. The button 8 slides in the mounting groove 105 and pushes the hook ear portion 2043 out of the mounting groove 105 until the hook ear portion 2043 is completely pushed out of the mounting groove 105. The locking state between the hook ear portion 2043 and the mounting seat 1 is released, the return spring 7 and the reed 6 release the elastic force, the front sleeve 2 moves in the opposite direction of S1, and the rear sleeve 2 moves in the direction of S1. During the process, the limiting protrusion 202 slides in the limiting groove 103, and the distance between the limiting protrusion 202 and the limiting end 1032 gradually increases, the buckle 204 slides in the guide groove 104, and the distance between the hook ear portion 2043 and the mounting groove 105 gradually increases, the return spring 7 gradually releases the elastic force, the elastic potential energy of the return spring 7 decreases, the reed 6 gradually releases the elastic force, and the curvature of the reed 6 becomes larger. The spring piece 6 first changes from a state of being in contact with the connecting piece 4 to a state of being tangent to the connecting piece 4. At this time, the locking piece 3 and the wire core 901 are still in a state of being in contact. As the elastic potential energy of the reset spring 7 and the spring piece 6 continues to be released, the spring piece 6 is converted from a state of being tangent to the side wall of the connecting piece 4 due to the connecting piece 4. Under the elastic deformation of the connecting piece 4, the connecting piece 4 gradually returns to the initial state of not being connected to the wire 9, and the locking piece 3 swings with the connecting piece 4. The connecting piece 4 and the locking piece 3 gradually move toward the inner wall of the sleeve 2 until the inner wall of the locking piece 3 is separated from the outer wall of the wire core 901, and the conductive state between the front wire core 901 and the rear wire core 901 is released until the sleeves 2 on the front and rear sides abut against the front and rear end sealing plates 5, thereby completing the separation of the crimp-free double-head terminal and the wires 9 on both sides. At this time, the wiring harnesses on both sides are pulled out of the mounting hole 101, and the recovery of the crimp-free double-head terminal is completed.

[0039] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A crimp-free double-ended terminal block, characterized in that: The invention comprises a mounting seat (1), a sealing plate (5), a sleeve (2), a locking piece (3) and a connecting piece (4); the mounting seat (1) is provided with a mounting hole (101) penetrating through both sides; the number of the sealing plate (5) and the sleeve (2) is two; the two sealing plates (5) are respectively arranged on both sides of the mounting seat (1); the sealing plate (5) is provided with a wire passing hole (501) coaxial with the mounting hole (101); the two sleeves (2) are coaxially slidably connected in the mounting hole (101); the locking piece (3) is arc-shaped; and each sleeve (2) is provided with at least two locking pieces (3) in a coaxial annular array; the inner diameter of the locking piece (3) is D1, the diameter of the wire core (901) is D2, the inner diameter of the sleeve (2) is D3, and the outer diameter of the wire skin (902) is D4. The diameter is D4, wherein 0.5 mm ≤ D1-D2 ≤ 2 mm, and D3 < D4. The corresponding locking pieces (3) in the two sleeves (2) are connected via a connecting piece (4). The connecting piece (4) is fixedly connected to the mounting seat (1). The locking pieces (3) and the connecting piece (4) are both made of a conductive material. A driving component and a limiting component are provided on the sleeve (2). The driving component is designed so that when the wire skin (902) pushes the sleeve (2) to slide into the mounting hole (101), the sleeve (2) drives the plurality of locking pieces (3) to gather toward the center of the sleeve (2) through the driving component. The limiting component is designed so that after the sleeve (2) slides into the mounting hole (101) to a set distance, the limiting component limits the sleeve (2) from sliding out of the mounting hole (101).

2. A crimp-free double-ended terminal block according to claim 1, characterized in that: The driving assembly comprises a spring sheet (6); a plurality of limiting grooves (103) are provided on the inner side wall of the mounting hole (101); the plurality of limiting grooves (103) correspond one-to-one with the plurality of locking sheets (3); the limiting groove (103) is a non-through groove; the limiting groove (103) comprises an open end (1031) and a limiting end (1032); the open end (1031) passes through the front end or the rear end of the mounting seat (1); the limiting end (1032) is located in the mounting seat (1); a plurality of avoidance grooves (203) are provided on the two sleeves (2); the plurality of avoidance grooves (203) correspond one-to-one with the plurality of locking sheets (3); the avoidance grooves ( One end of the spring (203) penetrates through the side of the sleeve (2) close to the limiting end, and the other end does not penetrate through the sleeve (2); a plurality of limiting protrusions (202) are also provided on the outer wall of the sleeve (2); the plurality of limiting protrusions (202) correspond one to one with the plurality of limiting grooves (103), and the limiting protrusions (202) are located on the side of the avoidance groove (203) that does not penetrate through the sleeve (2); the limiting protrusions (202) are slidably connected with the limiting grooves (103); the spring leaf (6) is arc-shaped; one end of the spring leaf (6) is connected to the limiting end (1032), and the other end is connected to the limiting protrusion (202), and the arc-shaped side wall of the spring leaf (6) abuts against the outer wall of the locking plate (3).

3. A crimp-free double-ended terminal block according to claim 2, characterized in that: The limiting assembly comprises a buckle (204), four guide grooves (104) are provided on the inner side wall of the mounting hole (101), the four guide grooves (104) all completely penetrate the mounting seat (1), and the four guide grooves (104) are symmetrical to each other, four buckles (204) are provided on the outer side walls of the two sleeves (2), the four buckles (204) are respectively slidably installed in the four guide grooves (104), the buckle (204) comprises a connecting end (2041), a swing section and a hook ear portion (2043), and The buckle (204) is in a "Z" shape, the swinging portion (2042) is located between the connecting end (2041) and the hook ear portion (2043) and is elastic, the connecting end (2041) is connected to the sleeve (2), the hook ear portion (2043) is slidably connected to the guide groove (104), and two mounting grooves (105) are provided on the middle side wall of the mounting seat (1), the two mounting grooves (105) are symmetrical to each other, and the two mounting grooves (105) are respectively connected to the two guide grooves (104).

4. A crimp-free double-ended terminal block according to claim 2, characterized in that: A plurality of latching teeth (301) are provided on the inner side wall of the locking piece (3), the annular cross section of each latching tooth (301) is in the shape of a cone, and the larger end is located on the side away from the limiting end (1032), and two adjacent latching teeth (301) are connected head to tail.

5. The crimp-free double-ended terminal block according to claim 3, characterized in that: The two installation grooves (105) are each provided with a button (8), the depth of the installation groove (105) is H1, the length of the hook ear portion (2043) is L1, and the installation depth of the button (8) is H2, wherein L1+H2≤H1.

6. A crimp-free double-ended terminal block according to claim 3, characterized in that: A return spring (7) is coaxially arranged in the mounting hole (101), and the two ends of the return spring (7) are respectively connected to the sleeves (2) on both sides, and the return spring (7) is in a compressed state when the sleeves (2) on both sides abut against the sealing plate (5).

7. A crimp-free double-ended terminal block according to claim 2, characterized in that: The arc-shaped side wall of the spring leaf (6) is coated with an insulating coating, and the thickness of the insulating layer is 0.1 mm to 0.3 mm.

8. The crimp-free double-ended terminal block according to claim 5, characterized in that: The mounting seat (1), sleeve (2), sealing plate (5) and button (8) are all made of any one of PVC, PC, ABS or PAN materials, and the flame retardant performance is not lower than V-0 level.

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