CN212695096U - Circuit breaker - Google Patents

Abstract

A circuit breaker belongs to the technical field of low-voltage electrical appliances. The circuit breaker comprises an operating mechanism and a contact system, wherein a rotating shaft of the operating mechanism drives the contact system to act, and the circuit breaker also comprises a base body and a first photoelectric switch arranged on the base body; a driving piece is fixed on a rotating shaft of the operating mechanism and triggers the first photoelectric switch through a moving rod; the substrate is provided with a sliding groove, and a first photoelectric switch is arranged in the sliding groove; the surface of one side, close to the base body, of the moving rod is attached to the sliding groove so as to close the opening side of the sliding groove, and a shading sheet extends out of the surface of one side, close to the base body, of the moving rod, slides in the sliding groove and is matched with the first photoelectric switch. The advantages are that: can carry out better sealed to photoelectric switch, prevent that external dust from disturbing photoelectric switch's work.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker.

Background

At present, the conventional circuit breakers are mostly air circuit breakers, an operating mechanism of the circuit breaker adopts a spring energy storage type, a set of relatively complex mechanical structure is used for driving a main contact to perform switching-on and switching-off motions, and when the operating mechanism performs switching-on and switching-off motions in work due to reasons such as lubrication, abrasion and blocking in the using process, the expected performance cannot be reached, so that the performance of the circuit breaker is poor or degraded, and the requirements of use and protection cannot be met. At this time, the performance of the operating mechanism needs to be detected, and the general detection content is whether the closing is in place or whether the opening is in place. In the prior art, a microswitch is often adopted to detect the position of in-place closing or in-place opening, and the detection is often lower in precision. When the photoelectric switch is used for replacing the micro switch, the photoelectric switch has high requirements on the working environment, so that the working environment is required to have high sealing performance, and the interference of dust is prevented. Therefore, when the photoelectric switch is used in a circuit breaker, a sealing device for the photoelectric switch is urgently needed to enable the photoelectric switch to realize the data acquisition function in the circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a circuit breaker, it has carries out better seal structure to photoelectric switch, prevents that the dust from disturbing photoelectric switch's work.

The utility model discloses a task is accomplished like this, a circuit breaker, including operating device and contact system, the pivot of operating device drives the action of contact system, and circuit breaker still includes the base member and sets up the first photoelectric switch on the base member; a driving piece is fixed on a rotating shaft of the operating mechanism and triggers the first photoelectric switch through a moving rod; the substrate is provided with a sliding groove, and a first photoelectric switch is arranged in the sliding groove; the surface of one side, close to the base body, of the moving rod is attached to the sliding groove so as to close the opening side of the sliding groove, and a shading sheet extends out of the surface of one side, close to the base body, of the moving rod, slides in the sliding groove and is matched with the first photoelectric switch.

In a specific embodiment of the present invention, an accommodating portion is disposed in a middle portion of the sliding groove in the length direction, and the accommodating portion is used for accommodating the first photoelectric switch.

In another specific embodiment of the present invention, the sliding groove is provided with a circle of convex edge, and a side surface of the motion bar close to the base body is attached to the convex edge.

In another specific embodiment of the present invention, the sliding groove is an arc-shaped groove.

In another specific embodiment of the present invention, the substrate is further provided with a first circuit board, the first photoelectric switch is mounted on the first circuit board, and the substrate is provided with a first circuit board accommodating cavity corresponding to the reverse side of the sliding groove for mounting the first circuit board.

In still another specific embodiment of the present invention, the operating mechanism includes side plates disposed at both sides and facing each other, and the base is installed outside the side plates.

In yet another specific embodiment of the present invention, the base member is provided with a mounting fixing leg and a pad leg, when the base member is mounted on the side plate, the mounting fixing leg and the pad leg are attached to the outer surface of the side plate, the base member is screwed into the side plate by passing through the mounting fixing leg by a screw, thereby realizing the mounting fixing between the base member and the side plate.

In a more specific embodiment of the present invention, the base body is further provided with a positioning hole, the side plate is provided with a positioning shaft, and the positioning shaft extends into the positioning hole, so as to realize the positioning between the base body and the side plate.

In yet another specific embodiment of the present invention, the movable rod is slidably disposed on the base.

In yet another specific embodiment of the present invention, the base member is provided with a sliding installation portion for installing the motion rod, the sliding installation portion includes a limit screw and a fitting hole, and the limit screw passes through the sliding groove on the motion rod and then is screwed into the corresponding fitting hole on the base member.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: firstly, a first photoelectric switch is arranged in a sliding groove formed in a base body of the circuit breaker, the surface of one side, close to the base body, of a moving rod is attached to the sliding groove so as to seal the opening side of the sliding groove, a shading sheet extends out of the surface of one side, close to the base body, of the moving rod, the shading sheet slides in the sliding groove and is matched with the first photoelectric switch, and the structure ensures that external dust cannot interfere with the work of the first photoelectric switch in the sliding groove; secondly, the surface of one side of the moving rod close to the base body is attached to the convex edge of the sliding groove, so that the moving rod only contacts the convex edge, the contact area of the moving rod and the sliding groove is reduced, and the friction force of the moving rod and the sliding groove in mutual sliding is reduced.

Drawings

Fig. 1 is a schematic side view of the circuit breaker operating mechanism of the present invention.

Fig. 2 is the closing in-place detection device of circuit breaker structural schematic.

Fig. 3 is the switching-on/switching-off detection device of the circuit breaker according to the present invention.

Fig. 4 is a schematic diagram of one side of the base body of the circuit breaker of the present invention.

Fig. 5 is another schematic diagram of the base of the circuit breaker of the present invention.

Fig. 6 is a schematic view of a portion of the base of the circuit breaker of the present invention.

Fig. 7 is a schematic view of a sealing structure of a photoelectric switch of the circuit breaker.

In the figure: 1. the device comprises an operating mechanism, 11 side plates, 111 guide grooves and 12 driving pieces;

2. the wiring harness fixing structure comprises a base body, a plate body 21, an abdicating concave cavity 211, a first mounting cavity 22, a sliding groove 221, a 2211 accommodating part 2212, a convex edge 222, a first circuit board accommodating cavity 2221, a first circuit board mounting screw hole 23, a mounting fixing pin 24, a sliding mounting part 241, a limiting screw 242, a matching hole 25, a second mounting cavity 251, a clamping hook 252, a clamping part 252, a wiring harness clamp 26, a positioning hole 27, a spring accommodating groove 28, a rotating hole 29 and a cushion pin 200;

3. the photoelectric switch comprises a moving rod, 31, a first moving rod, 32, a second moving rod, 33, a spring, 34, a shading sheet, 341, a first shading sheet, 342, a second shading sheet, 300, a first photoelectric switch, 301 and a first circuit board;

4. the device comprises a switching-on position detection device, 41, a linkage part, 42, a rotating shaft, 43, an elastic part, 44, a second photoelectric switch and 45, a second circuit board;

5. spring assembly, 51, spring, 52, mounting pin, 53, energy storage spring lower cover, 54, energy storage spring upper cover, 55, pushing shaft.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1, the present invention relates to a circuit breaker, which includes an operating mechanism 1 and a contact system (not shown in the figure), wherein the contact system includes a moving contact (not shown in the figure) and a static contact (not shown in the figure), and the moving contact is in contact with or separated from the static contact to realize the switching on and off of the circuit breaker. The operating mechanism 1 is an energy component of the circuit breaker and is used for driving the moving contact to act, so that the moving contact can be contacted with or separated from the fixed contact. The circuit breaker further comprises a controller, wherein the controller is used for detecting the current carrying condition of the circuit breaker and triggering the operating mechanism 1 to act when a fault occurs.

As shown in fig. 1 and 2, the operating mechanism 1 includes side plates 11 disposed at two sides and facing each other, and a spring assembly 5, a link assembly (not shown) and a rotating shaft (not shown) disposed at a side close to the contact system are disposed between the pair of side plates 11. When the circuit breaker performs a switching-on action, a switching-on signal is sent by the controller, the switching-on signal triggers the electromagnet to act, specifically, the switching-on electromagnet acts, after the switching-on electromagnet acts, the spring assembly 5 in the operating mechanism 1 is triggered to act, the spring assembly 5 drives the connecting rod assembly to act, the connecting rod assembly drives the rotating shaft to rotate, and after the rotating shaft rotates, the rotating shaft drives the contact system to perform the switching-on action.

As shown in fig. 1 and 3, the circuit breaker further includes an opening/closing detection device, which includes a driving member 12, a moving rod 3, a first photoelectric switch 300, and a first circuit board 301; the driving member 12 swings along with the rotating shaft, drives the moving rod 3 to move when the switching-on and switching-off are in place, triggers the first photoelectric switch 300 to output a signal after the moving rod 3 moves, and the first photoelectric switch 300 is connected with the first circuit board 301. The side plate 11 is provided with a base body 2, the base body 2 is provided with a moving rod 3 and a first photoelectric switch 300, and the moving rod 3 can be directly arranged on the side plate 11.

As shown in fig. 3, the moving rod 3 includes a first moving rod 31 and a second moving rod 32, a spring 33 is disposed between the first moving rod 31 and the second moving rod 32, one end of the spring 33 is connected to the first moving rod 31, and the other end is connected to the second moving rod 32, so as to provide a driving force for the first moving rod 31 and the second moving rod 32 to approach each other. In the process of closing movement, the driving member 12 drives the second moving rod 32 to move and triggers the first photoelectric switch 300 to output a signal; during the opening movement, the driving member 12 drives the first moving rod 31 to move and triggers the first photoelectric switch 300 to output a signal.

As shown in fig. 1 and 2, the driving member 12 is fixed to the rotating shaft. Of course, the fixing mode of the driving member 12 can be directly fixed on the rotating shaft or indirectly fixed. For example, a swing arm is fixed on the rotating shaft, and the driving member 12 is fixed on the swing arm, which can also meet the practical working requirement, and the driving member 12 also swings around the rotating shaft.

As shown in fig. 2, the spring assembly 5 is an energy component in the operating mechanism 1 for storing and releasing energy. The spring assembly 5 comprises an energy storage spring lower cover 53, an energy storage spring upper cover 54, a spring 51 and a mounting pin 52. The energy storage spring lower cover 53 and the energy storage spring upper cover 54 are respectively abutted against two ends of the spring 51, namely the spring 51 extends or contracts, and the energy storage spring lower cover 53 and the energy storage spring upper cover 54 are both positioned at two ends of the spring 51. The mounting pin 52 is located between the lower energy storage spring cover 53 and the upper energy storage spring cover 54, and the spring 51 is sleeved on the mounting pin 52. The lower cover 53 of the energy storage spring is abutted and fixed on the abutting plate between the pair of side plates 11. The energy storage spring upper cover 54 is matched with a pushing shaft 55. Specifically, the pushing shaft 55 is abutted to and matched with a concave cavity on the energy storage spring upper cover 54, the pushing shaft 55 is also matched with the switching-on in-place detection device 4 of the circuit breaker, and the switching-on in-place detection device 4 is installed on the base body 2.

As shown in fig. 2, the closing position detecting device 4 includes a linkage 41, a rotation shaft 42, an elastic member 43, a second photoelectric switch 44, and a second circuit board 45. The linkage 41 is a lever, one end of which is in push fit with the spring component 5, and the other end of which is in trigger fit with the second photoelectric switch 44. Namely, the spring assembly 5 drives the linkage 41 to rotate, and the linkage 41 triggers the second photoelectric switch 44 to output a switch-on in-place position signal after rotating. The interlocking member 41 can be rotatably disposed on the base 2 or on the side plate 11. Of course, it is also feasible that the linkage 41 is disposed on other components as long as the requirement of the work can be satisfied. The linkage 41 is rotatably arranged by a rotating shaft 42. Namely, the rotating shaft 42 serves as a rotating center of the linking member 41. The pivot axis 42 can be arranged on the base body 2 or on the side plate 11. One end of the elastic element 43 is connected to the linking element 41, and the other end is connected to the fixed component of the circuit breaker, so as to provide an elastic force for the linking element 41. The elastic force ensures that the linking member 41 is in a state when not driven by the spring assembly 5, i.e. does not trigger the signal conversion of the second photoelectric switch 44. The second photoelectric switch 44 is mounted on the second circuit board 45, and the second circuit board 45 is mounted on the base body 2. When the spring 51 is extended, the energy storage spring upper cover 54 is pushed to move, and the energy storage spring upper cover 54 pushes the pushing shaft 55 to move. Both ends of the push shaft 55 extend through guide grooves 111 of the pair of side plates 11. The guide groove 111 is formed in an arc shape to restrict the movement of the spring assembly 5.

As shown in fig. 4 to 7, the substrate 2 is generally made of a material, preferably a thermoplastic material. The base 2 can be understood as a mounting base on which the first photoelectric switch 300 and the first circuit board 301, the second photoelectric switch 44 and the second circuit board 45 are mounted, the motion bar 3 is slidably disposed on the base 2, and the linkage 41 is rotatably disposed on the base 2.

The first photoelectric switch 300 is mounted on the first circuit board 301, and the first circuit board 301 supplies power to the first photoelectric switch 300, and transmits an output signal of the first photoelectric switch 300 to the processing unit, and the processing unit processes the signal.

The second photoelectric switch 44 is mounted on the second circuit board 45, and the second circuit board 45 supplies power to the second photoelectric switch 44, and transmits the output signal of the second photoelectric switch 44 to the processing unit, and the processing unit processes the signal.

As shown in fig. 4 to 7, the base body 2 includes a plate body 21, and the plate body 21 is a main portion of the base body 2 and is provided with various structures for mounting the above-described various components to the base body 2. A relief recess 211 is provided in the plate body 21, and the relief recess 211 is used for allowing a screw head protruding from the side plate 11 to pass through. In order to facilitate the installation and fixation between the base body 2 and the side plate 11, an installation fixing leg 23, a positioning hole 27 and a pad 200 are arranged on the base body 2. Specifically, the mounting and fixing legs 23, the positioning holes 27 and the pad legs 200 are all disposed on the board body 21. When the base body 2 is mounted on the side plate 11, the mounting fixing feet 23 and the pad feet 200 are attached to the outer surface of the side plate 11, so that the base body 2 is prevented from shaking when mounted on the side plate 11. The base 200 is preferably in the shape of a raised plate, the mounting and fixing leg 23 is in the shape of a sleeve, and the base 2 can be screwed into the side plate 11 by passing a screw through the mounting and fixing leg 23, so that the mounting and fixing between the base 2 and the side plate 11 are realized.

As shown in fig. 3 and 4, the positioning holes 27 are used for positioning the substrate 2 and the side plate 11. Specifically, a positioning shaft is extended out of the side plate 11 and inserted into the positioning hole 27, so that the positioning between the substrate 2 and the side plate 11 is realized. Preferably, the positioning hole 27 is also sleeve-shaped.

As shown in fig. 4, 5 and 7, the base body 2, specifically, the plate body 21 is provided with a plurality of sliding mounting portions 24 for mounting the motion rod 3, so that the sliding arrangement of the motion rod 3 is more reliable. The sliding installation part 24 includes a limit screw 241 and a matching hole 242, and when the limit screw 241 is screwed into the corresponding matching hole 242 of the plate body 21 after passing through the limit groove of the moving rod 3, the moving rod 3 can be arranged on the base body 2 in a sliding manner. In a specific embodiment, since the motion bar 3 includes the first motion bar 31 and the second motion bar 32, the first motion bar 31 and the second motion bar 32 are stacked, and the limiting screw 241 penetrates through the limiting groove on the first motion bar 31 and the limiting groove on the second motion bar 32 and then into the corresponding matching hole 242 on the plate body 21.

As shown in fig. 3 to 6, a first mounting cavity 22 for mounting a first opto-electronic switch 300 and a first circuit board 301 is further provided on the base body 2, specifically, the plate body 21. The first mounting cavity 22 includes a sliding groove 221, and the sliding groove 221 is an arc-shaped groove corresponding to the swing-type sliding manner of the moving rod 3. A concave accommodating portion 2211 is provided in the longitudinal direction of the sliding groove 221, i.e., the middle portion in the arc length direction of the present embodiment, and the accommodating portion 2211 is used for accommodating the first photoelectric switch 300. The surface of the motion bar 3 near one side of the base body 2 is attached to the sliding groove 221, so that external dust cannot enter the sliding groove 221, and the opening side of the sliding groove 221 is closed. A light shielding sheet 34 extends from a surface of the motion bar 3 near the base 2, the light shielding sheet 34 is located in the sliding groove 221 and slides in the sliding groove 221, and when the motion bar slides to a designated position, the light shielding sheet 34 triggers the first photoelectric switch 300 to output a signal. The light shielding sheet 34 includes a first light shielding sheet 341 and a second light shielding sheet 342, wherein the first light shielding sheet 341 extends from the first moving rod 31, and the second light shielding sheet 342 extends from the second moving rod 32.

With the above arrangement, it is ensured that the operation of the first photoelectric switch 300 is not disturbed by external dust in the sliding groove 221. Further, in order to reduce the friction force between the moving rod 3 and the sliding groove 221 side, the two are made to slide each other better. A circle of convex edge 2212 is arranged on the sliding groove 221. This arrangement allows the moving rod 3 to contact only the protruding edge 2212, reducing the contact area between the two, thereby reducing the friction force of the two sliding against each other and meeting the requirement of shading.

As shown in fig. 3 to 6, the first mounting cavity 22 further includes a first circuit board accommodating cavity 222 for mounting a first circuit board 301. Specifically, the sliding groove 221 is located on one side of the board body 21, and the first circuit board receiving cavity 222 is located on the other side of the corresponding position on the board body 21. That is, a first circuit board accommodating cavity 222 for accommodating the first circuit board 301 is formed in the back surface of the base body 2 corresponding to the sliding groove 221, and a first circuit board mounting screw hole 2221 is formed in the first circuit board accommodating cavity 222. The first photoelectric switch 300 is fixed on the first circuit board 301, and after the two are installed, the first photoelectric switch 300 is installed inwards from the first circuit board accommodating cavity 222, pushed into the accommodating portion 2211, and screwed into the first circuit board mounting screw hole 2221 after passing through the mounting hole on the first circuit board 301 through a screw.

As shown in fig. 2, 4 and 5, the base body 2, specifically, the plate body 21, is further provided with a second mounting cavity 25 for mounting a second photoelectric switch 44 and a second circuit board 45. The second mounting cavity 25 includes a clamping hook 251 and a clamping portion 252, the clamping hook 251 and the clamping portion 252 cooperate with each other to clamp the second circuit board 45, and the second photoelectric switch 44 is directly and fixedly mounted on the second circuit board 45. Specifically, the second circuit board is inserted between the clamping hook 251 and the clamping portion 252. The head of the clamping hook 251 has a hook structure hooked on the edge of the second circuit board 45 to prevent the second circuit board 45 from being separated from the second mounting cavity 25.

As shown in fig. 2, 4 and 5, the base body 2, specifically, the plate body 21, further has a spring receiving groove 28 for receiving the elastic element 43, generally, the elastic element 43 is a tension spring, a spiral spring body of the tension spring is disposed in the spring receiving groove 28, one end of the elastic element 43 is hung on the plate body 21, and the other end is hung on the linking element 41.

As shown in fig. 2 and 4, the base body 2, specifically, the plate body 21, further has a rotation hole 29 for engaging with the rotation shaft 42. Specifically, the rotating shaft 42 penetrates through a rotating center hole of the linkage 41 and then is screwed into the rotating hole 29, so that the installation and positioning of the rotating shaft 42 are realized. The plate body 21 also has a harness clip 26 for fixing an internal harness.

The first and second opto- electronic switches 300, 44 are each a slot-type opto-electronic switch having a light emitting sidewall and a light receiving sidewall that extend therefrom and are spaced apart from one another to face one another to form a slot therebetween. When the corresponding light-shielding sheet is positioned between the light-emitting side wall and the light-receiving side wall, the photoelectric switch outputs a low level signal, and when the corresponding light-shielding sheet is not positioned between the light-emitting side wall and the light-receiving side wall, the photoelectric switch outputs a high level signal.

Claims (10)

1. The utility model provides a circuit breaker, includes operating device (1) and contact system, the pivot of operating device (1) drives the contact system action, its characterized in that: the circuit breaker further comprises a base body (2) and a first photoelectric switch (300) arranged on the base body (2); a driving piece (12) is fixed on a rotating shaft of the operating mechanism (1), and the driving piece (12) triggers a first photoelectric switch (300) through a moving rod (3); the basal body (2) is provided with a sliding groove (221), and a first photoelectric switch (300) is arranged in the sliding groove (221); one side surface of the moving rod (3) close to the base body (2) is attached to the sliding groove (221) so as to close the opening side of the sliding groove (221), a light shielding sheet (34) extends out of one side surface of the moving rod (3) close to the base body (2), and the light shielding sheet (34) slides in the sliding groove (221) and is matched with the first photoelectric switch (300).

2. A circuit breaker according to claim 1 wherein said sliding groove (221) is provided with a receiving portion (2211) at a middle portion in a length direction, said receiving portion (2211) being adapted to receive said first photoelectric switch (300).

3. A circuit breaker according to claim 1, wherein a circle of ledge (2212) is provided on the sliding groove (221), and a side surface of the moving rod (3) close to the base body (2) is attached to the ledge (2212).

4. A circuit breaker according to claim 1 wherein said sliding slot (221) is an arcuate slot.

5. A circuit breaker according to claim 1 wherein said base (2) further has a first circuit board (301) mounted thereon, said first photoelectric switch (300) being mounted on said first circuit board (301), said base (2) being provided with a first circuit board receiving cavity (222) for mounting said first circuit board (301) on a side opposite to said sliding groove (221).

6. A circuit breaker as claimed in claim 1, characterized in that said operating mechanism (1) comprises side plates (11) arranged on both sides and facing each other, said base body (2) being mounted on the outside of said side plates (11).

7. The circuit breaker according to claim 6, wherein the base body (2) is provided with a mounting fixing leg (23) and a pad leg (200), when the base body (2) is mounted on the side plate (11), the mounting fixing leg (23) and the pad leg (200) are attached to the outer surface of the side plate (11), and the base body (2) can be screwed into the side plate (11) by screws penetrating through the mounting fixing leg (23), so that the mounting and fixing between the base body (2) and the side plate (11) are realized.

8. A circuit breaker according to claim 7, characterized in that the base body (2) is further provided with positioning holes (27), a positioning shaft is protruded from the side plate (11), and the positioning shaft is protruded into the positioning holes (27), thereby realizing the positioning between the base body (2) and the side plate (11).

9. A circuit breaker as claimed in claim 1, characterized in that said moving rod (3) is slidingly arranged on the base body (2).

10. The circuit breaker according to claim 9, wherein the base (2) is provided with a sliding mounting portion (24) for mounting the moving rod (3), the sliding mounting portion (24) comprises a limit screw (241) and a matching hole (242), and the limit screw (241) passes through the limit groove on the moving rod (3) and then is screwed into the corresponding matching hole (242) on the base (2).

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