CN220672981U

CN220672981U - Cable connector and molded case circuit breaker

Info

Publication number: CN220672981U
Application number: CN202320152122.7U
Authority: CN
Inventors: 韦柳军; 唐丰田; 徐永富; 李想; 李祚
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2023-01-29
Filing date: 2023-01-29
Publication date: 2024-03-26
Anticipated expiration: 2033-01-29

Abstract

The utility model provides a cable conductor connector and moulded case circuit breaker, moulded case circuit breaker includes cable conductor connector, cable conductor connector includes wiring structure and sets up the connection structure at wiring structure side, connection structure is used for connecting female row, be equipped with wiring hole in the wiring structure and with the screw hole of wiring hole intercommunication, the wiring hole is used for holding the cable conductor, be equipped with the wiring screw in the screw hole, be equipped with first antiskid structure in the wiring hole, first antiskid structure includes the contact surface in the first that a plurality of intervals set up, contact surface sets up perpendicularly or the slope sets up with the axis of wiring hole in the first, the wiring screw is used for compressing tightly the cable conductor on the first antiskid structure, effectively prevents the cable conductor pine and takes off, improves shock resistance, and cable conductor connector can fully contact with the cable conductor moreover, is favorable to reducing contact resistance, reduces consumption and the temperature rise when electrified operation.

Description

Cable connector and molded case circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a cable connector and a molded case circuit breaker.

Background

Cable connectors are used for switching on and carrying the current of the upper line of the main switch and distributing the current of the lower load end, and a plurality of copper or aluminum cable strands are commonly used for wiring in low-voltage power distribution cabinets for civil use and industrial use in the united states, so that low-voltage molded case circuit breakers are equipped with the cable connectors in the north american market. The circuit breaker with the cable connector has a flexible wiring mode, can be directly connected with the bare wires, and realizes the connection of a plurality of wires. The molded case circuit breaker in the market of North America is required to meet the certification of UL489, and the cable connector is required to meet the certification requirement of UL486, wherein the load rotary drawing test and the load fixing standing test have the most strict performance requirements on the wiring terminal.

Although the prior art can add comparatively complicated unsmooth characteristic design at the binding screw low part to need to cooperate with the turn-ups hole on the wiring busbar, realize compressing tightly and fastening of cable conductor, prevent the pine of wire, nevertheless need specific condition to binding post's use, have certain limitation.

In addition, the prior art can also change the thick thread into the thin thread by changing the thickness of the thread, and improve the self-locking performance and the anti-loosening performance by reducing the thread pitch, increasing the number of turns of the thread and reducing the lead angle of the thread. However, the fine thread is not only vulnerable to injury, but also has a lower strength than the coarse thread, requires a higher processing accuracy, and increases costs, but also is not sufficiently reliable to pass fixing and drawing tests by only changing the coarse and fine threads.

Disclosure of Invention

The present utility model is directed to a cable connector that overcomes at least one of the drawbacks of the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a cable connector, its includes wiring structure and the connection structure of setting in wiring structure side, connection structure is used for connecting female row, be equipped with the wiring hole in the wiring structure and with the screw hole of wiring hole intercommunication, the wiring hole is used for holding the cable conductor, be equipped with the wiring screw in the screw hole, be equipped with first antiskid structure in the wiring hole, first antiskid structure includes the contact surface in the first of a plurality of intervals setting, contact surface sets up or the slope setting perpendicularly with the axis of wiring hole in the first, the wiring screw is used for compressing tightly the cable conductor on the first antiskid structure.

Preferably, the binding screw is provided with a second anti-slip structure, the second anti-slip structure comprises a second middle contact surface which is arranged at an oblique angle with the axis of the binding screw, and the second anti-slip structure is used for pushing the cable wire to be tightly pressed with the first anti-slip structure.

Preferably, the first anti-slip structure comprises a plurality of anti-slip grooves arranged at intervals, the cross sections of the anti-slip grooves are U-shaped, two side walls of each anti-slip groove which are oppositely arranged are respectively provided with a first middle contact surface, the bottom of each anti-slip groove is respectively provided with a first lower contact surface, the first lower contact surfaces of each anti-slip groove are respectively connected between the two first middle contact surfaces which are respectively opposite, a first upper contact surface is arranged between every two adjacent anti-slip grooves, and the first upper contact surfaces are connected between the first middle contact surfaces of the two adjacent anti-slip grooves.

Preferably, the wiring screw is provided with a conical groove, the wall of the groove is in a curved surface shape, the side wall of the groove forms the second middle contact surface, the bottom of the groove is provided with a second lower contact surface, and the periphery of the groove is provided with an annular second upper contact surface.

Preferably, the connecting structure is provided with a connecting hole, a connecting screw is arranged in the connecting hole, the connecting hole comprises a counter bore and a through hole communicated with the bottom of the counter bore, the bottom of the counter bore is provided with a limiting surface surrounding the periphery of the through hole, one end of the connecting screw is provided with a pan head which is in limiting fit with the limiting surface, and one end of the connecting screw, far away from the pan head, is used for penetrating through the through hole and the busbar and then is connected with a connecting nut.

Preferably, the connection structure comprises a connection bottom surface and a connection top surface which are oppositely arranged at two sides, and a connection side surface which is connected between the connection bottom surface and the connection top surface, wherein the connection side surface is connected with the connection structure, counter bores and through holes of the connection holes are respectively communicated with the connection bottom surface and the connection top surface, the connection bottom surface is used for contacting with a busbar, the connection structure comprises a connection bottom surface and a connection top surface which are oppositely arranged at two sides, the height of the connection structure is smaller than that of the connection structure, the connection bottom surface is flush with the connection bottom surface, and the connection top surface is connected with the connection top surface through a step surface.

Preferably, the cross section of wiring hole is circular, and the pore wall of wiring hole is the curved surface, the anti-skidding groove sets up on the pore wall of wiring hole, and a plurality of anti-skidding grooves arrange along the axial direction of wiring hole and set up with the circumference parallel arrangement of wiring hole respectively in the length direction of a plurality of anti-skidding grooves.

Preferably, the interval between two adjacent anti-slip grooves is 2-4mm.

Preferably, the wiring structure is provided with at least two threaded holes with different hole depths, and the hole depths of the two wiring holes corresponding to the threaded holes with different hole depths are also different; the wiring structure is also provided with a sampling hole, and the diameter of the sampling hole is smaller than that of the wiring hole.

According to the cable connector, the busbar of the switching electric appliance is connected through the connecting structure, the busbar is not required to be inserted into the wiring hole to be connected with the wiring structure, the first anti-slip structure is arranged in the wiring hole, the cable is directly pressed on the first anti-slip structure through the wiring screw, the occlusal surface of the cable is increased through the first anti-slip structure, and meanwhile, the contact area is increased, so that the friction force of the cable in loading and drawing can be increased, the cable is effectively prevented from loosening, the shock resistance is improved, the cable connector can be fully contacted with the cable, the contact resistance is reduced, and the power consumption and the temperature rise in electrified operation are reduced.

In addition, when the binding screw locks the multi-strand wires of the cable, the second anti-slip structure can form convex-concave fit with the wires and increase the contact area with the cable, thereby increasing the friction force and occlusion between the binding screw and the wires.

The utility model also provides a molded case circuit breaker, which comprises a shell, a busbar arranged in the shell, the cable connector, a connecting structure of the cable connector and the busbar, and a cover plate for shielding the cable connector.

Preferably, the two ends of the busbar are respectively provided with a first connecting end and a second connecting end, the first connecting end and the second connecting end are respectively used for connecting a plastic shell circuit breaker and a connecting structure, the first connecting end is located at one side, away from the wiring structure, of the second connecting end, one side, close to the wiring structure, of the second connecting end is provided with an avoidance space, and the plastic shell circuit breaker is provided with a supporting structure inserted into the avoidance space.

The molded case circuit breaker has the characteristics of convenient wiring and reliable connection.

Drawings

Fig. 1 is a schematic structural view of a molded case circuit breaker of the present utility model;

FIG. 2 is a schematic view of the present utility model after concealing the cover plate of FIG. 1;

fig. 3 is an exploded view of the molded case circuit breaker of the present utility model;

FIG. 4 is a schematic diagram of the cable connector and busbar of the present utility model;

fig. 5-6 are schematic views of the cable connector of the present utility model;

fig. 7 is a cross-sectional view of the cable connector of the present utility model;

FIGS. 8-9 are schematic views of the construction of the binding screw of the present utility model;

FIG. 10 is a cross-sectional view of the binding screw of the present utility model;

in the figure, 1, a wiring structure; 2. a connection structure; 3. a busbar; 11. a wiring hole; 12. a threaded hole; 13. a binding screw; 141. a first upper contact surface; 142. a first lower contact surface; 143. a first intermediate contact surface; 4. a housing; 5. a cover plate; 14. an anti-skid groove; 131. a second intermediate contact surface; 132. a second lower contact surface; 133. a second upper contact surface; 21. a connection hole; 22. a connecting screw; 23. countersink; 24. a through hole; 25. a limiting surface; 26. a pan head; 27. a coupling nut; 28. connecting the bottom surface; 29. connecting the top surface; 15. a wiring bottom surface; 16. a wiring top surface; 17. a step surface; 31. a first connection end; 32. a second connection end; 33. an avoidance space; 6. a support structure; 61. a weight reduction groove; 18. and a sampling hole.

Detailed Description

Embodiments of the cable connector according to the present utility model are further described below with reference to the examples shown in the drawings. The cable connector of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 4-7, the cable connector of the present utility model comprises a wiring structure 1 and a connection structure 2 disposed on a side surface of the wiring structure 1, wherein the connection structure 2 is used for connecting a busbar 3, a wiring hole 11 and a threaded hole 12 communicated with the wiring hole 11 are disposed in the wiring structure 1, the wiring hole 11 is used for accommodating a cable line, not shown in the diagram, a wiring screw 13 is disposed in the threaded hole 12, a first anti-slip structure is disposed on a hole wall of the wiring hole 11, the first anti-slip structure comprises a plurality of first middle contact surfaces 143 disposed at intervals, the first middle contact surfaces 143 are disposed perpendicularly or obliquely to an axis of the wiring hole 11, and the wiring screw 13 is used for pressing a cable on the first anti-slip structure.

According to the cable connector, the busbar 3 of the switching device is connected through the connecting structure 2, the busbar 3 is not required to be inserted into the wiring hole 11 to be connected with the wiring structure 1, the first anti-slip structure is arranged in the wiring hole 11, the cable is directly pressed on the first anti-slip structure through the wiring screw 13, the occlusal surface of the cable is increased through the first anti-slip structure, and meanwhile, the contact area is increased, so that the friction force of the cable in loading and drawing is increased, the cable loosening is effectively prevented, the anti-vibration capability is improved, the cable connector can be fully contacted with the cable, the contact resistance is reduced, and the power consumption and the temperature rise in electrified operation are reduced.

As shown in fig. 1-3, the utility model also provides a molded case circuit breaker, which comprises a housing 4 and a busbar 3 arranged in the housing 4, wherein the two ends of the housing 4 are respectively provided with the cable connectors, and the housing 4 is provided with a cover plate 5 for shielding the cable connectors.

The molded case circuit breaker has the characteristics of convenient wiring and reliable connection. Of course, the cable connector of the present utility model can be used for other switching devices, and all fall within the protection scope of the present utility model.

As shown in fig. 6-7, the first anti-slip structure of this embodiment includes a plurality of anti-slip grooves 14 disposed at intervals, the cross section of each anti-slip groove 14 is U-shaped, two opposite side walls of each anti-slip groove 14 are respectively provided with a first middle contact surface 143, the bottom of each anti-slip groove 14 is respectively provided with a first lower contact surface 142, the first lower contact surface 142 of each anti-slip groove 14 is respectively connected between two opposite first middle contact surfaces 143, a first upper contact surface 141 is provided between each two adjacent anti-slip grooves 14, and the first upper contact surface 141 is connected between the first middle contact surfaces 143 of two adjacent anti-slip grooves 14.

It is understood that the anti-slip groove 14 may take other shapes, for example, the anti-slip groove 14 may take a V-shaped cross section, so that the first middle contact surface 143 and the wire connection hole 11 are obliquely disposed, and the first lower contact surface 142 is a straight line connected between the two first middle contact surfaces 143, which falls within the protection scope of the present utility model.

The cross section of the wiring hole 11 in this embodiment is circular, the hole wall of the wiring hole 11 is a curved surface, the anti-skid grooves 14 are arranged on the hole wall of the wiring hole 11, the anti-skid grooves 14 are arranged along the axial direction of the wiring hole 11, the length direction of the anti-skid grooves 14 are respectively parallel to the circumferential direction of the wiring hole 11 or are obliquely arranged, and the interval between every two adjacent anti-skid grooves 14 is 2-4mm. The first anti-slip structure of this embodiment adopts the structure of the anti-slip slot 14, which has the characteristic of convenient processing, and of course, the first anti-slip structure can also adopt a boss structure to replace the anti-slip slot 14, such as a plurality of spaced stripe boss structures, which belong to the protection scope of the present utility model. As shown in fig. 8-10, the binding screw 13 is provided with a second anti-slip structure, which includes a second middle contact surface 131 disposed at an oblique angle to the axis of the binding screw 13, and the second anti-slip structure is used for pushing the cable to compress with the first anti-slip structure. When the binding screw 13 locks the multi-strand wire of the cable, the second anti-slip structure can form convex-concave fit with the wire and increase the contact area with the cable, thereby increasing the friction force and the biting force between the binding screw 13 and the wire.

The one end of this embodiment binding screw 13 is equipped with the operation groove, binding screw 13 is equipped with conical recess in the one end that keeps away from the operation groove, the cell wall of recess is curved surface shape, the lateral wall of recess constitutes contact surface 131 in the second, the bottom of recess is equipped with the second and goes down contact surface 132, binding screw 13 is equipped with annular second on the periphery of recess contact surface 133. The conical groove has the characteristics of convenient processing and low cost on the basis of improving friction force.

As shown in fig. 3-4, the connecting structure 2 is provided with a connecting hole 21, a connecting screw 22 is arranged in the connecting hole 21, the connecting hole 21 comprises a counter bore 23 and a through hole 24 communicated with the bottom of the counter bore 23, the bottom of the counter bore 23 is provided with a limiting surface 25 surrounding the periphery of the through hole 24, one end of the connecting screw 22 is provided with a pan head 26 in limiting fit with the limiting surface 25, and one end of the connecting screw 22, far away from the pan head 26, is used for being connected with a connecting nut 27 after passing through the through hole 24 and the busbar 3. The busbar 3 and the connecting structure 2 are limited through the connecting nut 27, the connecting structure has the characteristics of simple structure and convenient operation, the connecting hole 21 can be embedded into the pan head 26 of the connecting screw 22 at the same time, the insulation of the electrified part is enhanced, and the connecting nut 27 can also be arranged on the plastic shell type circuit breaker.

It is understood that the connecting hole 21 may be engaged with the connecting screw 22 in other manners, for example, the limiting surface 25 is not provided, and a thread engaged with the connecting screw 22 is provided in the connecting hole 21, which falls within the scope of the present utility model.

Further, the connection structure 2 comprises a connection bottom surface 28 and a connection top surface 29 which are oppositely arranged at two sides, and a connection side surface connected between the connection bottom surface 28 and the connection top surface 29, the connection side surface is connected with the connection structure 1, the counter bore 23 and the through hole 24 of the connection hole 21 are respectively communicated with the connection bottom surface 28 and the connection top surface 29, the connection bottom surface 28 is used for contacting the busbar 3, the connection structure 1 comprises a connection bottom surface 15 and a connection top surface 16 which are oppositely arranged at two sides, the height of the connection structure 2 is smaller than the height of the connection structure 1, the connection bottom surface 28 is arranged flush with the connection bottom surface 15, and the connection top surface 29 is connected with the connection top surface 16 through the step surface 17.

Further, the two ends of the busbar 3 are respectively provided with a first connecting end 31 and a second connecting end 32, the first connecting end 31 and the second connecting end 32 are respectively used for connecting the molded case circuit breaker and the connecting structure 2, the first connecting end 31 is located at one side, far away from the wiring structure 1, of the second connecting end 32, and the second connecting end 32 is in contact with the connecting bottom surface 28 of the connecting structure 2.

Further, an avoidance space 33 is arranged at one side of the second connecting end 32, which is close to the wiring structure 1, the molded case circuit breaker is provided with a support structure 6 inserted into the avoidance space 33, and a weight reduction groove 61 is arranged on the support structure 6, wherein the weight reduction groove 61 is used for reducing weight.

As shown in fig. 5-6, the wiring structure 1 is provided with a sampling hole 18, the sampling hole 18 is used for connecting and taking electricity of a secondary circuit, the diameter of the sampling hole 18 is far smaller than that of the wiring hole 11, the wiring structure 1 comprises two structures of four holes and three holes, the four holes are provided with four wiring holes 11, the three holes are provided with three wiring holes 11, each wiring hole 11 is respectively provided with a threaded hole 12 which is communicated with the other wiring holes, the hole depths of at least two threaded holes 12 are different, the hole depths of two wiring holes 11 corresponding to the threaded holes 12 with different hole depths are also different, the at least two threaded holes 12 are arranged front and back, the hole depths of the two threaded holes 12 arranged front and back are different, the hole depths of the corresponding wiring holes 11 are also different, the hole depths of the threaded holes 12 positioned at one side far away from the connecting structure 2 are shallower, the hole depths of the corresponding wiring holes 11 are also shallower, and the wiring holes 11 with different hole depths are arranged front and back rows are used for connecting cables with different current carrying flows.

When the cable is required to be connected, the cover plate 5 is firstly taken down, the bare wire end of the cable is inserted into the cable wiring hole 11 of the wiring terminal, then the wiring screw 13 is locked, after the cable of each wiring hole 11 of each phase is fixed, the cover plate 5 is installed back to the switch body to finish wiring, the wiring terminal is provided with the sampling hole 18 for connecting the wiring of the sampling wire, and when the wiring of the secondary circuit is required to be powered, the wiring can be realized through the threads. The cover plate 5 is used for increasing insulation and ensuring protection level, and the cover plate 5 is not required to be arranged, and the cover plate 5 is used for increasing insulation and ensuring protection level, and the wiring of the cable connector is not affected by the cover plate 5 without the wiring terminal, which belongs to the protection scope of the utility model. In addition, the cable connector in the embodiment can be used for wiring multi-strand copper wire hard wires and also can be used for connecting multi-strand aluminum wire soft wires.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. A cable connector, characterized in that: including wiring structure (1) and set up connection structure (2) in wiring structure (1) side, connection structure (2) are used for connecting female row (3), be equipped with wiring hole (11) in wiring structure (1) and with screw hole (12) of wiring hole (11) intercommunication, wiring hole (11) are used for holding the cable conductor, be equipped with wiring screw (13) in screw hole (12), be equipped with first antiskid structure in wiring hole (11), first antiskid structure includes contact surface (143) in the first of a plurality of intervals setting, contact surface (143) set up or slope setting perpendicularly with the axis of wiring hole (11) in the first, wiring screw (13) are used for compressing tightly the cable conductor on the first antiskid structure.

2. The electrical cable connector of claim 1, wherein: the wiring screw (13) is provided with a second anti-slip structure, the second anti-slip structure comprises a second middle contact surface (131) which is arranged at an oblique angle with the axis of the wiring screw (13), and the second anti-slip structure is used for pushing a cable wire to be tightly pressed with the first anti-slip structure.

3. The electrical cable connector of claim 1, wherein: the first anti-slip structure comprises a plurality of anti-slip grooves (14) which are arranged at intervals, the cross section of each anti-slip groove (14) is U-shaped, two opposite side walls of each anti-slip groove (14) are respectively provided with a first middle contact surface (143), the bottom of each anti-slip groove (14) is respectively provided with a first lower contact surface (142), the first lower contact surfaces (142) of each anti-slip groove (14) are respectively connected between the two opposite first middle contact surfaces (143), a first upper contact surface (141) is arranged between every two adjacent anti-slip grooves (14), and the first upper contact surfaces (141) are connected between the first middle contact surfaces (143) of the two adjacent anti-slip grooves (14).

4. The electrical cable connector of claim 2, wherein: the wiring screw (13) is provided with a conical groove, the wall of the groove is in a curved surface shape, the side wall of the groove forms a second middle contact surface (131), the bottom of the groove is provided with a second lower contact surface (132), and the periphery of the groove of the wiring screw (13) is provided with an annular second upper contact surface (133).

5. The electrical cable connector of claim 1, wherein: be equipped with connecting hole (21) in connection structure (2), be equipped with connecting screw (22) in connecting hole (21), connecting hole (21) include counter bore (23) and with through-hole (24) of counter bore (23) bottom intercommunication, counter bore (23) bottom be equipped with around through-hole (24) four limit surface (25), the one end of connecting screw (22) be equipped with limit surface (25) spacing complex coiled hair (26), the one end that coiled hair (26) were kept away from to connecting screw (22) is used for passing behind through-hole (24) and busbar (3) is connected with coupling nut (27).

6. The electrical cable connector of claim 5, wherein: connection structure (2) are including setting up connection bottom surface (28) and connection top surface (29) in the both sides relatively to and connect the connection side between connection bottom surface (28) and connection top surface (29), connect the side with wiring structure (1) link to each other, counter bore (23) and through-hole (24) of connecting hole (21) respectively with connection bottom surface (28) and connection top surface (29) intercommunication, connection bottom surface (28) are used for contacting busbar (3), wiring structure (1) are including setting up wiring bottom surface (15) and wiring top surface (16) in the both sides relatively, the height of connection structure (2) is less than the height of wiring structure (1), connection bottom surface (28) flush setting with wiring bottom surface (15), connection top surface (29) link to each other with wiring top surface (16) through step face (17).

7. A cable connector according to claim 3, wherein: the cross section of wiring hole (11) is circular, and the pore wall of wiring hole (11) is the curved surface, anti-skidding groove (14) set up on the pore wall of wiring hole (11), and the axial direction arrangement setting of wiring hole (11) is followed in a plurality of anti-skidding groove (14), and the length direction of a plurality of anti-skidding grooves (14) is parallel arrangement with the circumference of wiring hole (11) respectively.

8. A cable connector according to claim 3, wherein: the interval between two adjacent anti-slip grooves (14) is 2-4mm.

9. The electrical cable connector of claim 1, wherein: the wiring structure (1) is provided with at least two threaded holes (12) with different hole depths, and the hole depths of two wiring holes (11) corresponding to the two threaded holes (12) with different hole depths are also different; the wiring structure (1) is also provided with a sampling hole (18), and the diameter of the sampling hole (18) is smaller than that of the wiring hole (11).

10. A moulded case circuit breaker, its characterized in that: the cable connector comprises a shell (4) and a busbar (3) arranged in the shell (4), and is further provided with the cable connector according to any one of claims 1-9, wherein a connecting structure (2) of the cable connector is connected with the busbar (3), and a cover plate (5) for shielding the cable connector is arranged on the shell (4).

11. The molded case circuit breaker according to claim 10, wherein: the utility model discloses a circuit breaker, including female row (3), plastic case circuit breaker, connection structure (1) is kept away from to first link (31), second link (32), first link (31) and second link (32) are equipped with first link (31) and second link (32) respectively, first link (31) are located one side that wiring structure (1) was kept away from to second link (32), one side that second link (32) is close to wiring structure (1) is equipped with dodges space (33), plastic case circuit breaker is equipped with inserts supporting structure (6) in dodging space (33).