Screw type terminal block capable of bearing large torsion

Abstract

The utility model discloses a screw type terminal block capable of bearing large torsion, which comprises an insulating shell, a screw, a square box and a conductive terminal, the insulating shell is internally provided with a wiring accommodating cavity, the side wall of the insulating shell is provided with a wire inlet which is communicated with the wiring accommodating cavity in an opposite manner, and a conductive plate at one end of the conductive terminal is fixedly arranged in the wiring accommodating cavity. The square box can be installed in the wiring containing cavity in a sliding mode by a set distance, the square box is provided with a clamping plate which is parallel to and directly faces the conductive plate of the conductive terminal, and the clamping plate slides along with the square box to change the distance between the clamping plate and the conductive plate so as to clamp or loosen a wire entering from the wire inlet. The conductive terminal further comprises a high-hardness metal plate, and the high-hardness metal plate is fixedly covered on the surface of one side, opposite to the clamping plate, of the conductive plate. According to the utility model, the conductive terminal is enabled to have higher hardness while the original conductivity is ensured, and the service life of the conductive terminal is prolonged. And a larger torsion range can be borne.

Description

Technical Field

[0001] The utility model relates to a screw type terminal block, in particular to a screw type terminal block capable of bearing large torque. Background Art

[0002] When wiring, screw-type terminal blocks are often used. The rotation of the screw drives the square box up and down, and then clamps the wire together with the conductive plate on the terminal to connect the wires. Existing screw-type terminal blocks have a limited applicable torque range. When subjected to large torque, the conductive plate of the metal terminal is clamped by the screw and the square box, causing it to dent and deform. In the wiring state, the deformation of the metal terminal conductive plate is obvious, which affects the product function. Utility Model Content

[0003] In order to overcome the above-mentioned defects, the utility model provides a screw-type terminal block that can withstand large torque. The screw-type terminal block that can withstand large torque is convenient for connecting and removing wires, and the conductive plate of its conductive terminal will not be deformed when subjected to large torque, thereby ensuring that the product's function is stable and effective in the long term.

[0004] The utility model adopts a technical solution to solve its technical problems: a screw-type terminal block that can withstand large torque, including an insulating shell, a screw, a square box and a conductive terminal, the insulating shell is provided with a wiring accommodating cavity, the insulating shell side wall is provided with a wire inlet that is directly connected to the wiring accommodating cavity, the conductive plate at one end of the conductive terminal is fixedly arranged in the wiring accommodating cavity of the insulating shell, the square box can be slid and installed in the wiring accommodating cavity of the insulating shell at a set distance, the square box is provided with a clamping plate that is parallel and directly opposite to the conductive plate of the conductive terminal, the clamping plate can change its distance from the conductive plate as the square box slides, and thus clamp or loosen the wire entering from the wire inlet, the screw can be rotated in the circumferential direction and stopped in the axial direction on the insulating shell, the screw is movably screwed to the square box, and the forward and reverse rotation of the screw can drive the square box to slide back and forth, and the conductive terminal also includes a high-hardness metal plate, and the high-hardness metal plate is fixedly covered on the side surface of the conductive plate facing away from the clamping plate.

[0005] As a further improvement of the present invention, at least one rivet column is provided on the surface of the conductive plate of the conductive terminal facing away from the clamping plate, and at least one rivet hole is provided on the high-hardness metal plate. The rivet column is inserted into the rivet hole and fixes the high-hardness metal plate to the conductive plate of the conductive terminal.

[0006] As a further improvement of the present invention, two cylindrical rivet columns are provided at intervals on the surface of the conductive plate of the conductive terminal facing away from the clamping plate, and two circular rivet holes are provided on the high-hardness metal plate. The two cylindrical rivet columns are inserted into the two circular rivet holes one by one for riveting.

[0007] As a further improvement of the present invention, the screw includes a stud with an external thread, and a radially outward-expanding screw head and a radially contracted pressing head are coaxially provided at both ends of the stud. A screw head positioning cavity connected to the wiring accommodating cavity is also provided in the insulating shell. The screw head can be rotatably accommodated in the screw head positioning cavity in the circumferential direction, and the axial end surfaces of the screw head are stopped on the inner side wall of the screw head positioning cavity. The tightening head of the screw is tightly against the surface of the high-hardness metal plate facing away from the conductive plate.

[0008] As a further improvement of the present invention, a locking screw channel connected to the wiring accommodating cavity is provided in the insulating shell, the inner diameter of the channel is larger than the outer diameter of the screw head of the screw, and a T-shaped screw limiting sleeve is provided on the inner side of the upper end of the locking screw channel, and a stop step is formed between the two ends of the T-shaped screw limiting sleeve. A limiting boss protruding toward the center of the locking screw channel is also provided on the inner side wall of a section with a large diameter of the T-shaped screw limiting sleeve. The screw head can be accommodated in a section with a large diameter of the T-shaped screw limiting sleeve, and the two axial end surfaces of the screw head are respectively stopped on the limiting boss and the stop step.

[0009] As a further improvement of the present invention, the cross-section of the wiring accommodating cavity in the insulating shell is square, and the square box includes a square frame-shaped main body. One end of the opening of the square frame-shaped main body is directly connected to the wire inlet at the upper end of the side wall of the insulating shell. The conductive plate of the conductive terminal is inserted into the square frame-shaped main body through the other end of the opening of the square frame-shaped main body. A clamping plate is formed on one side wall of the frame-shaped main body, and a threaded hole is formed on the side wall of the square frame-shaped main body opposite to the clamping plate. The threaded hole is movably screwed to the stud of the screw.

[0010] As a further improvement of the present invention, the square box also includes a guide and limit plug, which is integrally formed on the outer wall of the square frame-shaped main body by bending, and the guide and limit plug extends along the sliding square of the square box. The wiring accommodating cavity of the insulating shell is provided with a guide and limit slot on the bottom surface of the sliding square of the square box, and the guide and limit plug of the square box can be slidably inserted into the guide and limit slot.

[0011] As a further improvement of the present invention, a step structure is formed on the inner side of the wiring accommodating cavity of the insulating shell, the width of one end of which is greater than the width of the other end. The conductive terminal also includes a terminal body and a conductive pin. The conductive plate and the conductive pin are respectively integrally formed on the two ends of the terminal body. The conductive plate and the terminal body at one end of the conductive terminal form an L-shaped structure together. The conductive pin extends to the outside of the insulating shell through the hollow portion on the bottom surface of one end of the insulating shell. The outer side wall of the L-shaped structure formed by the terminal body, the conductive plate and the high-hardness metal plate of the conductive terminal is tightly against the inner side surface of one end of the wiring accommodating cavity and is fixedly positioned in the wiring accommodating cavity of the insulating shell.

[0012] As a further improvement of the present invention, the insulating shell includes a plastic body and a plastic bottom cover, a cavity structure with an open end is formed on the plastic body, the plastic bottom plate can be removably fixed to cover one end of the plastic body, and close the opening at one end of the cavity structure to form a wiring accommodating cavity, one end of the terminal body of the conductive terminal is tightly against the inner surface of the plastic bottom cover, and the conductive pin of the conductive terminal extends through the hollow portion on the plastic bottom cover.

[0013] As a further improvement of the present invention, the inner side wall of the opening at one end of the plastic body and the outer side wall of the plastic base are connected and fixed by means of an undercut protrusion and a snap-fitting groove.

[0014] The beneficial effects of the present invention are as follows: the present invention fixes and rivets a composite high-hardness metal plate on the conductive plate of the conductive terminal, thereby greatly improving the strength of the conductive plate of the conductive terminal. During use, when wiring is performed through large torque, the conductive plate will not be compressed and deformed, thereby ensuring that the conductive terminal has higher hardness while ensuring the original conductive ability and can withstand a larger torque range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional exploded view of the utility model;

[0016] Figure 2 It is a three-dimensional diagram of the utility model;

[0017] Figure 3 This is a cross-sectional view of the structural principle of the utility model;

[0018] Figure 4 This is a three-dimensional diagram of the plastic body of the present utility model;

[0019] Figure 5 This is a three-dimensional diagram of the plastic bottom cover of the present invention;

[0020] Figure 6 This is a three-dimensional diagram of the screw of the present utility model;

[0021] Figure 7 This is a three-dimensional diagram of the square box of the present utility model;

[0022] Figure 8 This is a three-dimensional diagram of the conductive terminal of the present utility model;

[0023] Figure 9 This is a three-dimensional exploded view of the conductive terminal of the present invention. DETAILED DESCRIPTION

[0024] Embodiment: A screw-type terminal block that can withstand large torque includes an insulating shell, a screw 1, a square box 2 and a conductive terminal 3. A wiring accommodating chamber 4 is provided inside the insulating shell, and a line inlet 5 that is directly connected to the wiring accommodating chamber 4 is provided on the side wall of the insulating shell. A conductive plate 6 at one end of the conductive terminal 3 is fixedly arranged in the wiring accommodating chamber 4 of the insulating shell, and the square box 2 can be slid and installed in the wiring accommodating chamber 4 of the insulating shell at a set distance. A clamping plate 7 is provided on the square box 2, which is parallel to and directly opposite to the conductive plate 6 of the conductive terminal 3. The clamping plate 7 can change its distance from the conductive plate 6 as the square box 2 slides, thereby clamping or loosening the wire entering from the line inlet 5. The screw 1 can be rotated in the circumferential direction and is installed on the insulating shell with axial stop. The screw 1 is movably screwed to the square box 2, and the forward and reverse rotation of the screw 1 can drive the square box 2 to slide back and forth. The conductive terminal 3 also includes a high-hardness metal plate 8, which is fixedly covered on the side surface of the conductive plate 6 facing away from the clamping plate 7.

[0025] By fixing a high-hardness metal plate 8 on the conductive plate 6 of the conductive terminal 3, the strength of the conductive plate 6 of the conductive terminal 3 is greatly improved. When wiring is performed with a large torque, it will not be deformed under the large pressure of the screw 1 and the clamping plate 7. It can withstand large torque wiring and the wiring is firm and stable.

[0026] At least one rivet post 9 is provided on the surface of the conductive plate 6 of the conductive terminal 3 facing away from the clamping plate 7, and at least one rivet hole 10 is provided on the high-hardness metal plate 8. The rivet post 9 is inserted into the rivet hole 10 and securely rivets the high-hardness metal plate 8 to the conductive plate 6 of the conductive terminal 3. The conductive plate 6 of the conductive terminal 3 and the high-hardness metal plate 8 are connected together by riveting, so that the high-hardness metal plate 8 is fixedly covered on the outer surface of the conductive plate 6. This does not affect the conductive plate 6 and the clamping plate 7 of the square box 2 clamping the wires for conduction. At the same time, the strength of the conductive plate 6 of the conductive terminal 3 is greatly improved, so that it will not deform even under large extrusion forces and can withstand high torque wiring operations. In addition, the high-hardness metal plate 8 can also be welded to the conductive plate 6 of the conductive terminal 3 or snap-fitted to the conductive plate 6 of the conductive terminal 3. Such equivalent replacement structures are easily conceivable by those skilled in the art based on this patent and fall within the scope of protection of this patent.

[0027] Two cylindrical rivet posts 9 are spaced apart on the surface of the conductive plate 6 of the conductive terminal 3 facing away from the clamping plate 7. The high-hardness metal plate 8 is provided with two circular rivet holes 10 arranged at intervals. The two cylindrical rivet posts 9 are inserted into the two circular rivet holes 10 for riveting. The two rivet posts 9 and the two rivet holes 10 cooperate to form a riveted connection. After riveting, the two rivet posts 9 and the two rivet holes 10 ensure accurate positioning of the high-hardness metal plate 8 and the conductive plate 6, and the connection is strong and not easily damaged.

[0028] The screw 1 includes a stud 11 with an external thread. A radially outwardly expanding screw head 12 and a radially contracting pressing head 13 are coaxially disposed at either end of the stud 11. The insulating housing further includes a screw head positioning cavity 14 that communicates with the wiring accommodating cavity 4. The screw head 12 is rotatably received within the screw head positioning cavity 14. The axial ends of the screw head 12 are abutted against the inner wall of the screw head positioning cavity 14. The pressing head 13 of the screw 1 abuts against the surface of the high-hardness metal plate 8 facing away from the conductive plate 6. The screw head 12 of the screw 1 is used for tightening with a screwdriver. The stud 11 is used for movably threading with the square box 2, driving the square box 2 to move up and down.

[0029] The insulating shell is provided with a locking screw channel 15 connected to the wiring accommodating chamber 4, the inner diameter of the channel is larger than the outer diameter of the screw head 12 of the screw 1, and a T-shaped screw limiting sleeve 16 is provided on the inner side of the upper end of the locking screw channel 15, and a stop step 17 is formed between the two ends of the T-shaped screw limiting sleeve 16. A limiting boss 18 protruding toward the center direction of the locking screw channel 15 is also provided on the inner side wall of a section with a large diameter of the T-shaped screw limiting sleeve 16. The screw head 12 can be accommodated in a section with a large diameter of the T-shaped screw limiting sleeve 16, and the axial end surfaces of the screw head 12 are respectively stopped on the limiting boss and the stop step 17. The cantilever structure can achieve elastic expansion, which makes it easy to smoothly install the screw head 12 into the screw head positioning cavity 14, and after installation, the screw head 12 can be automatically axially blocked and limited to prevent the screw 1 from falling off. In addition, the screw 1 can be installed in the countersunk channel and then installed in the countersunk of the countersunk channel by snap-fitting, pressing the screw head 12 to achieve axial positioning of the screw 1. These are equivalent replacement structures that can be easily thought of by technical personnel in this field based on this patent, and fall within the scope of protection of this patent.

[0030] The wiring accommodating cavity 4 in the insulating shell has a square cross-section. The square box 2 includes a square frame-shaped main body. One end of the opening of the square frame-shaped main body is directly connected to the wire inlet 5 at the upper end of the side wall of the insulating shell. The conductive plate 6 of the conductive terminal 3 is inserted into the square frame-shaped main body through the other end of the opening of the square frame-shaped main body. A clamping plate 7 is formed on one side wall of the frame-shaped main body. A threaded hole 26 is formed on the side wall of the frame-shaped main body opposite to the clamping plate 7. The threaded hole 26 is movably screwed to the stud 11 of the screw 1. The square channel structure has a strong wiring accommodation capacity and can slide and guide the square box 2 to prevent the square box 2 from rotating in the wiring accommodation cavity 4 and being unable to smoothly insert the wire. The square box 2 can be formed by bending a long strip of sheet metal, and the two ends of the sheet metal are staggered and overlapped to form a complete square frame structure. The threaded holes 26 are set on the staggered and overlapping parts of the sheet metal. The screws 1 can be used to fix and position the staggered parts of the overlapping sheet metal of the square box 2 to prevent the staggered and overlapping parts from being cracked under stress after the sheet metal is bent. The square box 2 can also be a hardware part. These are equivalent replacement structures that can be easily thought of by those skilled in the art based on this patent and fall within the scope of protection of this patent.

[0031] The box 2 also includes a guide and limiter tab 25, which is integrally formed on the outer wall of the frame-shaped main body by bending. The guide and limiter tab 25 extends along the sliding square of the box 2. The wiring accommodating cavity 4 of the insulating housing is provided with a guide and limiter slot on the bottom surface along the sliding square of the box 2. The guide and limiter tab 25 of the box 2 can be slidably inserted into the guide and limiter slot. The wire limiter tab further guides the box 2 as it slides up and down and limits the sliding distance of the box 2.

[0032] The inner side of the wiring accommodating cavity 4 of the insulating housing forms a stepped structure with one end wider than the other. The conductive terminal 3 also includes a terminal body 20 and a conductive pin 19. The conductive plate 6 and the conductive pin 19 are integrally formed at both ends of the terminal body 20. The conductive plate 6 and the terminal body 20 at one end together form an L-shaped structure. The conductive pin 19 extends outside the insulating housing through a hollow portion on the bottom surface of one end of the insulating housing. The outer sidewall of the L-shaped structure formed by the terminal body 20, the conductive plate 6, and the high-hardness metal plate 8 of the conductive terminal 3 closely abuts the inner sidewall of one end of the wiring accommodating cavity 4, thereby securing the conductive terminal 3 within the wiring accommodating cavity 4 of the insulating housing. The conductive terminal 3 is secured in place by pressing against the inner sidewall of one end of the wiring accommodating cavity 4. Alternatively, the conductive terminal 3 can be secured by engaging with a plastic component through a barb.

[0033] The insulating housing includes a plastic body 21 and a plastic bottom cover 22. The plastic body 21 forms a cavity structure with an open end. A plastic bottom plate is removably fixed to cover one end of the plastic body 21 and seals the open end of the cavity structure to form a wiring accommodating cavity 4. One end of the terminal body 20 of the conductive terminal 3 abuts against the inner surface of the plastic bottom cover 22, and the conductive pin 19 of the conductive terminal 3 extends through the hollow portion of the plastic bottom cover 22. The insulating housing adopts an assembled structure of the plastic body 21 and the plastic bottom cover 22, which facilitates the assembly of the square box 2 and the conductive terminal 3.

[0034] The inner side wall of the opening at one end of the plastic body 21 and the outer side wall of the plastic base are fastened and fixed together by an undercut protrusion 23 and a locking groove 24 .

Claims

1. A screw-type terminal block capable of withstanding large torque, comprising an insulating shell, a screw (1), a square box (2) and a conductive terminal (3), wherein a wiring accommodating chamber (4) is provided inside the insulating shell, a line inlet (5) which is in direct communication with the wiring accommodating chamber is provided on a side wall of the insulating shell, a conductive plate (6) at one end of the conductive terminal is fixedly arranged in the wiring accommodating chamber of the insulating shell, the square box is slidably mounted in the wiring accommodating chamber of the insulating shell at a set distance, a clamping plate (7) is provided on the square box which is parallel to and directly opposite to the conductive plate of the conductive terminal, the clamping plate can change its distance from the conductive plate as the square box slides, thereby clamping or loosening the wire entering from the line inlet, the screw is rotatable in the circumferential direction and is axially fixed on the insulating shell, the screw is movably screwed to the square box, and the forward and reverse rotation of the screw can drive the square box to slide back and forth, characterized in that: The conductive terminal further comprises a high-hardness metal plate (8), which is fixedly covered on a side surface of the conductive plate facing away from the clamping plate.

2. The screw-type terminal block capable of withstanding large torque according to claim 1, characterized in that: At least one rivet column (9) is provided on the surface of the conductive plate of the conductive terminal facing away from the clamping plate, and at least one rivet hole (10) is provided on the high-hardness metal plate. The rivet column is inserted into the rivet hole and fixedly rivets the high-hardness metal plate to the conductive plate of the conductive terminal.

3. The screw-type terminal block capable of withstanding large torque according to claim 2, characterized in that: Two cylindrical rivet columns are provided at intervals on the surface of the conductive plate of the conductive terminal facing away from the clamping plate, and two circular rivet holes are provided on the high-hardness metal plate. The two cylindrical rivet columns are inserted into the two circular rivet holes one by one for riveting.

4. The screw-type terminal block capable of withstanding large torque according to claim 1, characterized in that: The screw comprises a stud (11) with an external thread, and a radially outward-expanding screw head (12) and a radially contracted pressing head (13) are coaxially provided at both ends of the stud, and a screw head positioning cavity (14) connected to the wiring accommodating cavity is further provided in the insulating shell, and the screw head is rotatably accommodated in the screw head positioning cavity in the circumferential direction, and the axial end surfaces of the screw head are stopped on the inner side wall of the screw head positioning cavity, and the screw pressing head is pressed against the surface of the high-hardness metal plate on the side facing away from the conductive plate.

5. The screw-type terminal block capable of withstanding large torque according to claim 4, characterized in that: The insulating shell is provided with a locking screw channel (15) connected to the wiring accommodating cavity, the inner diameter of the channel is larger than the outer diameter of the screw head of the screw, and a T-shaped screw limiting sleeve (16) is provided on the inner side of the upper end of the locking screw channel, and a stop step (17) is formed between the two ends of the T-shaped screw limiting sleeve. A limiting boss (18) protruding toward the center of the locking screw channel is also provided on the inner side wall of a section with a larger diameter of the T-shaped screw limiting sleeve. The screw head can be accommodated in a section with a larger diameter of the T-shaped screw limiting sleeve, and the two axial end faces of the screw head are respectively stopped on the limiting boss and the stop step.

6. The screw-type terminal block capable of withstanding large torque according to claim 2, characterized in that: The wiring accommodating cavity in the insulating shell has a square cross-section. The square box includes a square frame-shaped main body. One end of the square frame-shaped main body opening is directly connected to the wire inlet at the upper end of the side wall of the insulating shell. The conductive plate of the conductive terminal is inserted into the square frame-shaped main body through the other end of the square frame-shaped main body opening. A clamping plate is formed on one side wall of the square frame-shaped main body. A threaded hole (26) is formed on the side wall of the square frame-shaped main body facing the clamping plate. The threaded hole is movably screwed to the stud of the screw.

7. The screw-type terminal block capable of withstanding large torque according to claim 6, characterized in that: The square box further comprises a guide limiting insert (25), which is integrally formed on the outer side wall of the square frame-shaped main body by bending, and the guide limiting insert extends along the sliding square of the square box. The wiring accommodating cavity of the insulating shell is provided with a guide limiting slot on the bottom surface of the sliding square of the square box, and the guide limiting insert of the square box can be slidably inserted into the guide limiting slot.

8. The screw-type terminal block capable of withstanding large torque according to claim 1, characterized in that: The inner side of the wiring accommodating cavity of the insulating shell forms a step structure with a width at one end greater than that at the other end. The conductive terminal also includes a terminal body (20) and a conductive pin (19). The conductive plate and the conductive pin are respectively integrally formed on both ends of the terminal body. The conductive plate and the terminal body at one end together form an L-shaped structure. The conductive pin extends out of the insulating shell through a hollow portion on the bottom surface of one end of the insulating shell. The outer side wall of the L-shaped structure formed by the terminal body, the conductive plate and the high-hardness metal plate of the conductive terminal is tightly pressed against the inner side surface of one end of the wiring accommodating cavity and is fixedly positioned in the wiring accommodating cavity of the insulating shell.

9. The screw-type terminal block capable of withstanding large torque according to claim 8, characterized in that: The insulating shell comprises a plastic body (21) and a plastic bottom cover (22), wherein a cavity structure with an open end is formed on the plastic body, and the plastic bottom plate can be detachably fixed to cover one end of the plastic body and close the opening of one end of the cavity structure to form a wiring accommodating cavity, wherein one end of the terminal body of the conductive terminal is tightly against the inner surface of the plastic bottom cover, and the conductive pin of the conductive terminal extends through the hollow portion on the plastic bottom cover.

10. The screw-type terminal block capable of withstanding large torque according to claim 9, characterized in that: The inner side wall of the opening at one end of the plastic body and the outer side wall of the plastic base are fastened and fixed via an undercut protrusion (23) and a clamping groove (24).

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