CN209344006U - A leakage circuit breaker terminal - Google Patents

Abstract

The utility model belongs to a connection terminal, in particular to a leakage circuit breaker connection terminal, comprising a lower pressure plate for electrical connection with an external cable, an upper pressure plate is arranged above it, and the left and right sides of the upper pressure plate are There is a square protrusion at the middle end, and there is a square opening on the side wall of the circuit breaker body on the left and right sides of the lower pressure plate. The square protrusion slides up and down and is installed in the square opening. There is a compression spring A, and a cam is installed on the top of the upper pressure plate. The cam is connected to the circuit breaker body through a rotating shaft. The rotating shaft passes through one side of the circuit breaker body and is fixedly connected with a positioning rod. The positioning rod is L-shaped There are several positioning holes on the outer wall of the circuit breaker body, which are used to fix the position of the positioning rod. The utility model can effectively solve the problem that the convenience of plugging and the connection firmness of the external cable at the terminal of the leakage circuit breaker cannot be well balanced.

Description

A leakage circuit breaker terminal

technical field

The utility model belongs to a connection terminal, in particular to a leakage circuit breaker connection terminal.

Background technique

The leakage circuit breaker is a switch that can automatically operate when the leakage current in the circuit exceeds a predetermined value, which has a decisive protective significance for the safety of electricity use.

The terminal parts of today's circuit breakers usually include bolts, upper pressure plates and bearing plates. The upper pressure plate moves towards the bearing plate through the downward rotation of the bolts, and the cables are fixed between the upper pressure plate and the bearing plate, and the bolts are further rotated to achieve Both the upper pressure plate and the bearing plate only clamp the cable, but the operation of this structure is cumbersome. First, the bolt must be rotated to achieve a sufficient distance between the upper pressure plate and the bearing plate to facilitate the successful insertion of the cable. If the distance between the upper pressure plate and the load plate is not large enough, it is very likely that the cable cannot be successfully plugged in, resulting in a connection failure, especially for many terminals located inside the earth leakage circuit breaker today, which is not easy to observe, and then One problem is that the bolt needs to be rotated no matter whether the cable is inserted or pulled out, and such an operation is time-consuming and laborious, and the work efficiency is low.

China's published utility model patent "leakage circuit breaker" (publication number: CN205621681), as shown in Figure 1, by setting the limit part (6) above the conductive plate, the limit part (6) and the leakage circuit breaker body ( 1) Rotational connection, an elastic piece is arranged between the conductive plate and the earth leakage circuit breaker body (1), and the limiting part (6) clamps the external cable (4) between the limiting part (6) and the conductive part by rotating and compressing the elastic piece. Between the boards, in order to realize the problem of connecting without using a screwdriver, the problem is that although the traditional technical solution is more convenient in use, there is a new potential safety hazard, that is, the existence of elastic parts causes the connection between the cable and the conductive plate. Squeeze can not guarantee very firm, since it has a certain degree of elasticity, it is difficult to ensure the strength of extrusion, and it is easy to cause the cable to pull out in a slight pull; in addition, the distance between the limit plate and the conductive plate is due to the It can be adjusted according to the thickness of the cable, but this adjustment does not give enough extrusion force, only the distance adjustment is made through the elasticity of the elastic parts, and the extrusion firmness is difficult to grasp due to the large range of elasticity changes. with certain security risks

When the cable is too thin, the clamping is not tight; when it is too thick, because the conductive plate is pushed up by the spring, the distance between the conductive plate and the limit part cannot be large enough, resulting in inconvenient insertion.

It can be seen from the above that the convenience of plugging the cables at the circuit breaker terminals and the firmness of the cable connections cannot be well balanced.

Utility model content

According to the above deficiencies in the prior art, the utility model provides a leakage circuit breaker terminal, which can effectively solve the problem that the convenience of plugging and the connection firmness of the external cable of the leakage circuit breaker terminal cannot be well balanced. question.

The technical problem solved by the utility model adopts the following technical scheme: a circuit breaker terminal, including a lower pressure plate for electrical connection with an external cable, and an upper pressure plate is arranged above the lower pressure plate, so that The middle ends of the left and right sides of the upper pressure plate are provided with square protrusions, and the side walls of the circuit breaker body on the left and right sides of the lower pressure plate are provided with a square opening, and the square protrusions are set in the square opening by sliding up and down. Inside, the shape and size of the square protrusion match the shape and size of the square opening, and a compression spring A is vertically arranged in the square opening, its top is fixedly connected to the bottom of the square protrusion, and its bottom is connected to the square The inner side wall of the bottom of the opening is fixedly connected, the bottom of the square opening is lower than the level of the lower pressure plate, and a cam is rotated above the upper pressure plate, and the cam is rotatably connected with the circuit breaker body through a rotating shaft. The rotating shaft passes through one side of the circuit breaker body and is fixedly connected with a positioning rod. The positioning rod is bent in an L shape. The positioning rod has an arm end A and an arm end B that are perpendicular to each other. The arm end A and the arm end B are The right outer wall of the circuit breaker body is parallel, the arm end B is perpendicular to the right outer wall of the circuit breaker body and extends toward the right outer wall of the circuit breaker body, and several positioning holes are opened on the outer wall of the circuit breaker body , the centers of several positioning holes are all located on a circular arc centered on the rotating shaft, and the shape and size of the positioning holes match the shape and size of the arm end B.

When inserting an external cable into the terminal, when the upper pressing plate is not pressed down by the cam, the compression spring A props up the upper pressing plate, and there is a sufficient distance between the upper pressing plate and the lower pressing plate The external cable can be easily inserted, and the upper pressure plate acts as a board to exert pressure on the external cable, which can make the contact surface between the external cable and the lower pressure plate larger, and the conductive effect is better. Set the compression spring A The bottom is lower than the level of the lower pressure plate, so that when the compression spring A is squeezed, that is, when the upper pressure plate and the lower pressure plate are close to each other, the distance between the two can meet the external cables of any diameter , the shortest distance between the upper pressure plate and the lower pressure plate will not be affected by the shortest length of the compression spring A.

The cam rotates with the shaft, and the bottom of the cam is offset against the top of the upper pressure plate. Because the structural characteristics of the cam 40 determine that when the shaft rotates, the level of the bottom of the cam will also change to control the height of the upper pressure plate.

The positioning hole where the arm end B of the positioning rod is different, the height of the upper clamping plate is just different under the cam control, according to the thickness of the external cable, the positioning hole where the positioning rod is located is changed, and then it is applicable to external cables of various diameters.

Further, a compression spring B is sheathed in a gap on the rotating shaft, the compression spring B is located between the cam and the positioning rod, one end of the compression spring B is fixedly connected to one side of the cam, and the compression spring B The other end of B is fixedly connected with the side wall of the circuit breaker body.

The elastic force of the compression spring B makes the cam always separate from the side wall of the circuit breaker body, that is, driven by the compression spring B, the arm end B of the positioning rod always has a tendency to insert into the positioning hole; when it is necessary to change the position of the arm end B When positioning the hole, the manpower pulls one end of the rotating shaft outward, so that the compression spring B is in a more compressed state, so that the arm end B is pulled out from the original positioning hole, and the positioning hole where the arm end B is located is changed. Changing the position of the cam also changes the distance between the upper crimping plate and the lower crimping plate, and then controls whether to clamp the external cable or unload the external cable according to the thickness of the external cable.

Further, the bottom of the upper pressure plate is provided with several convex lines from front to back, and each of the convex lines is arranged in the left and right direction.

Further, the raised strip is made of rubber material. The setting of the raised strip increases the friction between the upper crimping plate and the external cable, and increases the stability of cable fixing.

Further, the rotating shaft passes through the side wall of the circuit breaker body and is vertically fixedly connected with the control rod. The rotating shaft can be arranged to be vertically fixedly connected to the middle part of the control rod, and the function of the control rod is to facilitate outward pulling of the rotating shaft and convenient rotation of the rotating shaft to change the position of the cam.

Further, the lower end of the cam, the top end of the upper pressure plate, the surface of the square protrusion, and the inside of the square opening are all coated with lubricating oil.

The utility model has the following beneficial effects: (1) The terminal of the utility model does not need to use a screwdriver in the whole process, and because the upper and lower pressing plates are stretched by the compression spring A, the wire insertion is very convenient, The operation is fast; (2) At the same time, multiple positioning holes can realize the clamping of cables of different sizes, because when the cam presses the upper crimping plate downward to realize the clamping of cables between the upper crimping plate and the lower crimping plate , there is no elastic part at the bottom of the lower crimping plate, that is, the lower crimping plate does not have a certain range of up and down movement, so the positioning of the upper crimping plate can ensure the stability of the upper and lower crimping plates for cable extrusion, Compared with the prior art, the fixing of the external cable has better firmness and stability; (3) in addition, because the bottom of the upwardly lifted compression spring A does not start from the lower pressure wire plate, but is located at the lower pressure Below the line plate, so the length of the compression spring A can be set so as not to affect the extrusion of the thinner external cable, which is more applicable to the diameter range of the cable than the prior art.

Description of drawings

FIG. 1 is a schematic perspective view of the structure of a circuit breaker in the prior art in the background art;

Fig. 2 is the schematic diagram of the front view structure of the embodiment provided by the utility model;

Fig. 3 is a schematic diagram of a partial cutaway right side view of an embodiment provided by the utility model;

Fig. 4 is a partial right view schematic diagram of the embodiment provided by the utility model;

Fig. 5 is a schematic right view of the upper pressure plate in Fig. 2;

In the figure: 1. Circuit breaker body 11, positioning hole 20, lower pressure plate 21, square opening 30, upper pressure plate 31, square protrusion 32, compression spring A 33, convex strip 4, external cable 40, cam 41 , rotating shaft 42, positioning rod 421, arm end A422, arm end B 43, compression spring B 44, control rod 2, connecting groove 6, limiter.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Embodiment one:

As shown in Figure 1, it is a circuit breaker and its terminal structure in the prior art. The design of the utility model is based on the structure of the existing circuit breaker body in Figure 1, and the improvement made for its terminal, Therefore, the structure of the circuit breaker body mentioned in the utility model refers to the prior art in FIG. The wire pressing plate 20 is placed on the inner lower end surface of the connection groove 2 .

As shown in Figures 2 to 5, a leakage circuit breaker terminal according to the utility model includes a lower pressure plate 20 for electrical connection with an external cable 4, and the upper part of the lower pressure plate 20 is provided with The upper crimping plate 30, the left and right middle ends of the upper crimping plate 30 are provided with square protrusions 31, and the side walls of the circuit breaker body 1 on the left and right sides of the lower crimping plate 20 are provided with a square opening 21 , the square protrusion 31 slides up and down in the square opening 21, the shape and size of the square protrusion 31 match the shape and size of the square opening 21, and a compression spring is vertically arranged in the square opening 21 A32, its top is fixedly connected to the bottom of the square protrusion 31, and its bottom is fixedly connected to the bottom inner wall of the square opening 21, the bottom of the square opening 21 is lower than the level of the lower pressure line plate 20, and the upper pressure line A cam 40 is rotated above the plate 30, and the cam 40 is rotationally connected with the circuit breaker body 1 through a rotating shaft 41. The rotating shaft 41 passes through one side of the circuit breaker body 1 and is fixedly connected with a positioning rod 42. The positioning The rod 42 is bent in an L shape. The positioning rod 42 has an arm end A421 and an arm end B422 perpendicular to each other. The arm end A421 is parallel to the right outer wall of the circuit breaker body 1, and the arm end B422 is parallel to the The right outer wall of the main body 1 is perpendicular to and extends toward the right outer wall of the circuit breaker body 1. There are several positioning holes 11 on the outer wall of the circuit breaker main body 1. The centers of the positioning holes 11 are located on the rotating shaft 41 The shape and size of the positioning hole 11 and the shape and size of the arm end B422 are matched with each other on an arc with the center as the center.

When inserting the external cable 4 into the terminal, when the upper pressing plate 30 is not pressed down by the cam 40, the compression spring A32 props up the upper pressing plate 30, and the upper pressing plate 30 and the lower pressing plate 20 There is enough distance between them so that the external cable 4 can be inserted easily, and the upper crimping plate 30 acts as a board surface to apply pressure to the external cable 4, which can make the contact surface between the external cable 4 and the lower crimping plate 20 larger , the conductive effect is better, and the bottom of the compression spring A32 is set to be lower than the level of the lower pressure plate 20, so that it can be set that when the compression spring A32 is squeezed, that is, when the upper pressure plate 30 and the lower pressure plate 20 are close to each other, The distance between the two can satisfy the external cables 4 of any diameter, and the shortest distance between the upper pressing plate 30 and the lower pressing plate 20 will not be affected by the shortest length of the compression spring A32.

The cam 40 rotates with the rotating shaft 41, and the bottom of the cam 40 is offset against the top of the upper pressing plate 30. Because of the structural characteristics of the cam 40 itself, when the rotating shaft 41 rotates, the level of the bottom of the cam 40 will also change to realize the upper pressing. Control of the height of the wire plate 30.

The positioning hole 11 where the arm end B422 of the positioning rod 42 is located is different, and the height of the upper pressure plate 30 controlled by the cam 40 is just different. Diameter of external cable 4.

Further, a compression spring B43 is sleeved in a gap on the rotating shaft 41, the compression spring B43 is located between the cam 40 and the positioning rod 42, and one end of the compression spring B43 is fixedly connected to one side of the cam 40, The other end of the compression spring B43 is fixedly connected to the side wall of the circuit breaker body 1 .

The elastic force of the compression spring B43 makes the cam 40 always separated from the side wall of the circuit breaker body 1, that is, driven by the compression spring B43, the arm end B422 of the positioning rod 42 always has a tendency to insert into the positioning hole 11; when it is necessary to change the arm When the positioning hole 11 where the arm end B422 is located, the manpower pulls one end of the rotating shaft 41 outward, so that the compression spring B43 is in a more compressed state, so that the arm end B422 is pulled out from the original positioning hole 11, and the position of the arm end B422 is changed. Positioning hole 11, that is, changing the position of the cam 40, also changes the distance between the upper pressure plate 30 and the lower pressure plate 20, and then controls whether to clamp the external cable 4 or unload the external cable 4 according to the thickness of the external cable 4. cable 4.

Further, the bottom of the upper pressure plate 30 is provided with several convex strips 33 from front to back, and each of the convex strips 33 is arranged in the left and right directions.

Further, the protruding strip 33 is made of rubber material. The setting of the convex strip 33 has increased the friction between the upper pressure plate 30 and the external cable 4, and increased the stability of cable fixing.

Further, the rotating shaft 41 passes through the side wall of the circuit breaker body 1 and is vertically fixedly connected with a control rod 44 . The rotating shaft 41 can be vertically and fixedly connected to the middle part of the control rod 44 , and the function of the control rod 44 is to facilitate pulling the rotating shaft 41 outwards and conveniently rotating the rotating shaft 41 to change the position of the cam 40 .

Further, the lower end of the cam 40 , the top end of the upper pressure plate 30 , the surface of the square protrusion 31 , and the inside of the square opening 21 are all coated with lubricating oil.

Specific use process:

Pull the control lever 44 outward to disengage the arm end B422 from the positioning hole 11 and rotate the control lever 44 so that the bottom of the cam 40 moves forward and upward, and the upper pressure plate 30 moves upward under the push of the compression spring A32. When there is enough space between the plate 30 and the lower pressure plate 20, put the external cable 4 between the upper pressure plate 30 and the lower pressure plate 20, and then pull the control lever 44 away from the circuit breaker body 1 , that is to squeeze the compression spring B43, disengage the arm end B422 from the positioning hole 11, and then rotate the control lever 44 so that the cam 40 presses the upper pressure plate 30 downward, and then the square protrusion 31 of the upper pressure plate 30 moves in the direction Move downwards in the opening 21 until the rotation of the control rod 44 cannot be resisted enough, and when the manual operation cannot be performed, the external cable 4 is clamped, and the arm end B422 of the positioning rod 42 at this time is placed at the corresponding positioning position of the positioning rod 42. In the hole 11, the position of the upper pressure plate 30 is fixed (when the hand is released, the arm end B422 automatically enters the positioning hole 11 under the drive of the compression spring B43). When the external cable 4 needs to be unloaded, the above operation can be performed in reverse.

The whole process does not need to use a screwdriver, the compression spring A32 makes it convenient to provide enough distance between the upper and lower crimping plates for the insertion of the external cable 4, and the operation is fast; multiple positioning holes 11 can realize the clamping of external cables 4 of different sizes Tight, because when the cam 40 presses the upper crimping plate 30 downward to clamp the cable between the upper crimping plate 30 and the lower crimping plate 20, there is no elastic member at the bottom of the lower crimping plate 20, that is, the lower crimping wire The plate 20 does not have a certain range of up and down movement, so after the upper pressure plate 30 is positioned, the stability of the upper pressure plate 30 and the lower pressure plate 20 for cable extrusion can be guaranteed; in addition, the compression spring A32 used for upward jacking The bottom does not start from the lower clamping plate 20, but is located below the lower clamping plate 20, so the length of the compression spring A32 can be set so as not to affect the extrusion of the thinner external cable 4. Because if the top and the bottom of the compression spring A32 are directly arranged between the lower pressure plate 20 and the upper pressure plate 30, the shortest distance of the compression spring A32 itself after compression will affect the extrusion of the thinner external cable 4.

The above is an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the specification of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are all included in the scope of patent protection of the utility model in the same way.

Claims (6)

1. a kind of leakage circuit breakers terminals, including the lower tension disc for being electrically connected with external cable, it is characterised in that: described Tension disc is provided with above lower tension disc, the left and right sides middle-end of the upper tension disc is provided with square protruding, under described A square aperture is offered on breaker body side wall at left and right sides of tension disc, the square protruding, which slides up and down, to be set to In square aperture, shape, the size of the square protruding are matched with the shape of square aperture, size, Yu Suoshu square aperture It is inside vertically provided with compressed spring A, top is fixedly connected with the bottom of square protruding, in the bottom of bottom and square aperture Side wall is fixedly connected, and the bottom of the square aperture is lower than the level height of lower tension disc, the top rotation of the upper tension disc It is provided with cam, the cam is rotatablely connected by shaft and breaker body, and the shaft is worn from the side of breaker body Out and it is fixedly connected with locating rod, the locating rod is the bending of L shape, and the locating rod has orthogonal arm end A and arm end B, the arm end A is parallel with the right outside sidewall of breaker body, and the right outside sidewall of the arm end B and breaker body is perpendicular And extend towards the right outside sidewall of breaker body, several location holes are offered on the lateral wall of the breaker body, it is several The center of the location hole is respectively positioned on the circular arc centered on shaft, shape, the shape of size and arm end B of the location hole Shape, size cooperate.

2. leakage circuit breakers terminals according to claim 1, it is characterised in that: gap is equipped with compression in the shaft Spring B, the compressed spring B is between cam and locating rod, one end end of the compressed spring B and a side of cam While being fixedly connected, the other end end of the compressed spring B is fixedly connected with the side wall of breaker body.

3. leakage circuit breakers terminals according to claim 1 in the past, it is characterised in that: the bottom of the upper tension disc is arrived After be provided with several raised lines, each raised line is left and right directions setting.

4. leakage circuit breakers terminals according to claim 3, it is characterised in that: the raised line selects rubber material system Make.

5. leakage circuit breakers terminals according to claim 1, it is characterised in that: the shaft is from the side of breaker body Wall is vertically fixedly connected with control-rod after being pierced by.

6. leakage circuit breakers terminals according to claim 1, it is characterised in that: the lower end of the cam, upper tension disc Top, the surface of square protruding, the inside of square aperture be coated with lubricating oil.