CN211150453U - N-pole mechanism of residual current circuit breaker - Google Patents

Abstract

An N-pole mechanism of a residual current circuit breaker is characterized in that the N-pole mechanism (8) comprises a contact seat (802), the contact seat (802) is sleeved on a contact seat mounting shaft (101) on a shell (1) and can rotate around the contact seat mounting shaft (101), one end of a contact seat shaft (802a) is mounted at one side end of the contact seat (802), the other end of the contact seat shaft (802a) is embedded on an L-pole mechanism, and when a switch is switched on and switched off, a L-pole mechanism drives the contact seat (802) to rotate around the contact seat mounting shaft (101) through the contact seat shaft (802 a).

Description

N-pole mechanism of residual current circuit breaker

Technical Field

The utility model belongs to the technical field of the low pressure electricity, specifically say so and relate to a residual current circuit breaker's N utmost point mechanism.

Background

The residual current circuit breaker (hereinafter referred to as circuit breaker) is mainly suitable for the distribution network with 50Hz of alternating current, 400V of rated voltage and 800A of rated current, is used for providing indirect contact protection for people, can also be used for preventing fire hazard caused by ground fault current generated by insulation damage of equipment, can be used for distributing electric energy and protecting overload and short circuit of circuits and power supply equipment, and can also be used for infrequent switching of the circuits and infrequent starting of the motor.

The partial products of the existing residual current circuit breaker adopt structures of an 18mm1PN small circuit breaker and an 18mm electric leakage mechanism to realize function control, but the structure is limited by the space structure of the small circuit breaker and the breaking capacity is poor, the partial products of the residual current circuit breaker adopt a L-pole circuit breaker with 18mm, an N-pole mechanism with 18mm and an electric leakage mechanism, the N-pole mechanism is arranged at the lower right corner of a shell, and the electric leakage mechanism is arranged at the upper right side.

SUMMERY OF THE UTILITY MODEL

The utility model aims at that just being poor to above-mentioned current surplus circuit breaker breaking capacity, the many technical defect of installation, providing a residual current circuit breaker's N utmost point mechanism, on adopting L utmost point circuit breakers to add N utmost point mechanism and electric leakage mechanism basis, carried out improvement design to N utmost point mechanism, installed N utmost point contact in the casing upper right corner promptly, through L utmost point mechanism direct linkage, simplified process, reduce cost, lifting efficiency.

Technical scheme

In order to realize the technical purpose, the utility model provides an N-pole mechanism of residual current circuit breaker, which is characterized in that the N-pole mechanism comprises a contact seat, the contact seat is sleeved on a contact seat mounting shaft on a shell and can rotate around the contact seat mounting shaft, one side end on the contact seat is provided with one end of a contact seat shaft, the other end of the contact seat shaft is embedded on an L-pole mechanism, and when the brake is closed and opened, the L-pole mechanism drives the contact seat to rotate around the contact seat mounting shaft through the contact seat shaft;

the contact seat is provided with a moving contact mounting groove, and the moving contact extends into the moving contact mounting groove and is arranged in the moving contact mounting groove by using a moving contact shaft and can rotate around the moving contact shaft.

Furthermore, a moving contact limiting structure is arranged on one end side of the moving contact extending into the moving contact mounting groove, the shell and the moving contact, the moving contact limiting structure and an elastic element connected to the moving contact can enable the moving contact and the contact base to form a dead point position during opening, and the moving contact limiting structure and the elastic element provide final pressure for the moving contact during closing;

furthermore, the moving contact limiting structure comprises a kidney-shaped hole at one end side of the moving contact extending into the moving contact mounting groove, a limiting hole corresponding to the kidney-shaped hole on the contact seat and a limiting shaft embedded on the shell, wherein the limiting shaft penetrates through a positioning hole, a limiting hole and the kidney-shaped hole arranged on the contact seat mounting shaft, and the tail end of the limiting shaft is fixedly mounted in a partition plate in the shell;

furthermore, the contact seat is V-shaped, a turning position on the contact seat is provided with a rotating hole, the rotating hole is sleeved on the contact seat mounting shaft, a contact seat shaft is arranged in a contact seat shaft hole at one side end of the contact seat, and the moving contact shaft penetrates through two ends of the moving contact and is fixedly arranged in holes on two side walls of the moving contact mounting groove;

furthermore, one end of the elastic element is hung in a hanging hole on the moving contact, and the other end of the elastic element is installed on a hanging shaft on the shell;

further, the rotation center of the contact seat is concentric with the rotation center of the L-pole mechanism;

further, one end of the contact seat shaft, which is embedded on the operating mechanism with L poles, penetrates out of the through hole in the shell.

Advantageous effects

The utility model provides a pair of residual current circuit breaker's N utmost point mechanism, on the structure basis of whole 2 utmost points, improved the design to N utmost point mechanism place N utmost point mechanism next-door neighbour L utmost point circuit breaker (L level operating device) promptly, conveniently realize direct linkage.

Drawings

Fig. 1 is a product diagram of the remaining circuit breakers in the embodiment of the present invention;

fig. 2 is an exploded view of the remaining circuit breakers in an embodiment of the present invention;

fig. 3a is a schematic diagram of the positions of the left chamber and the right chamber in the remaining circuit breakers of the embodiments of the present invention;

fig. 3b is a schematic structural diagram of a right chamber in the remaining circuit breaker of the embodiment of the present invention;

fig. 4 is a structural schematic diagram of an installation position of an L pole mechanism in an embodiment of the present invention;

fig. 5 is a schematic view of the installation position structure of the leakage mechanism in the embodiment of the present invention;

fig. 6 is a schematic linkage diagram of an L pole mechanism and an N pole mechanism in an embodiment of the present invention;

fig. 7 is a schematic linkage diagram of an L pole mechanism and a leakage mechanism in an embodiment of the present invention;

FIG. 8 is a schematic structural view of a middle cover and a partition plate in an embodiment of the present invention;

FIG. 9a is an exploded view of a spacer mounting structure according to an embodiment of the present invention;

FIG. 9b is a schematic diagram of a structure of a position of a partition board in the embodiment of the present invention;

fig. 10a is an assembly view of an N-pole mechanism in an embodiment of the present invention;

fig. 10b is an exploded view of the N-pole mechanism in the embodiment of the present invention;

fig. 10c is a contact block linkage diagram according to an embodiment of the present invention;

FIG. 10d is a drawing illustrating the installation of a contact block according to an embodiment of the present invention;

FIG. 11a is an assembly drawing of an electromagnetic system according to an embodiment of the present invention;

FIG. 11b is a schematic diagram of a connection terminal block according to an embodiment of the present invention;

fig. 11c is a first schematic view of a mounting structure of a connection terminal block according to an embodiment of the present invention;

FIG. 11d is a schematic structural view of a housing according to an embodiment of the present invention;

fig. 12a is a product drawing of a second connection terminal in an embodiment of the present invention;

FIG. 12b is a schematic structural diagram of a wire frame according to an embodiment of the present invention;

fig. 12c is a schematic structural diagram of a protective cover according to an embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Examples

As shown in fig. 1, 2, 3a and 3b, a residual current circuit breaker includes a housing 1, where the housing 1 is formed by assembling a base a, a middle cover 2, a terminal block 1108 and an upper cover 14, the housing 1 is divided into a left chamber 3 and a right chamber 4 by the middle cover 2, the left chamber 3 is internally provided with L-pole mechanisms 5, an arc extinguish chamber 6 and a L-pole static contact 1101 of an electromagnetic system 11, the right chamber 4 is provided with a partition 7, the partition 7 divides the upper right corner of the right chamber 4 into a left partition a and a right partition b, the left partition a is internally provided with an N-pole mechanism 8, the right partition b is internally provided with an electric leakage mechanism 9, the right chamber 4 is internally provided with a release 10 inside the electric leakage mechanism 9, a transformer 1102 in the electromagnetic system 11 is arranged below the release 10, the right cavity 4 is internally provided with a circuit board support 12 at the lower side of the electric leakage mechanism 9, the N-pole static contact 1103 of the electromagnetic system 11 is arranged between the middle cover 2 and the circuit board support 12, and the circuit board support 12 is provided.

As shown in fig. 9a and 9b, in order to better achieve the purpose of avoiding the interference generated by the movement between the N-pole mechanism 8 and the leakage mechanism 9. The clapboard 7 is arranged on the middle cover 2; the middle cover 2 is provided with a plurality of ribs 201, and the ribs 201 are matched with the partition plate surface 701 of the partition plate 7 to ensure that the partition plate 7 is horizontal along the vertical direction; the height of the plurality of ribs 201 is greater than that of the N-pole mechanism 8, so that the degree of freedom of the N-pole mechanism 8 is guaranteed; the middle cover 2 is provided with a middle cover shaft I202, and the middle cover shaft I202 is arranged in a partition plate hole I702 on the partition plate 7; a second middle cover shaft 203 is embedded in the middle cover 2, and the second middle cover shaft 203 penetrates through a second partition plate hole 703 in the partition plate 7 and then is matched with the upper cover 14; the first middle cover shaft 202 and the second middle cover shaft 203 are used for positioning the partition plate 3; a third partition hole 704 on the partition plate 7 is matched with a first N pole mechanism shaft 801 on the N pole mechanism 8 to fix the rotation center of the N pole mechanism 8; a positioning surface 705 is arranged on the right side of the partition plate 7 and used for mounting the electric leakage mechanism 9; a first partition plate shaft 706 is arranged on the partition plate 7, the first partition plate shaft 706 is installed in a matching manner with a first leakage mechanism hole 901 on the leakage mechanism 9, and the first partition plate shaft 706 is the rotation center of the leakage mechanism 9; a limiting rib 707 is arranged on the partition plate 7, and is matched with a second surface 902 on the electric leakage mechanism 9 to limit the position of the electric leakage mechanism 9 during brake opening; the first baffle shaft 706 on the baffle plate 7 is concentric with the third baffle hole 704.

As shown in fig. 11a, 11b, 11c and 11d, the electromagnetic system 11 includes a first terminal 1104, a second terminal 1105, a first lead 1106, a second lead 1107, a L pole static contact 1101, an N pole static contact 1103 and a transformer 1102, the first terminal 1104 and the L pole static contact 1101 are welded and connected into a whole through the first lead 1106 penetrating through the transformer 1102, the second terminal 1105 and the N pole static contact 1103 are welded and connected into a whole through the second lead 1107 penetrating through the transformer 1102, specifically, the first terminal 1104 is installed on one side of a circuit breaker base a, an extension 1104a of the first terminal 1104 is installed in a first groove 1108a of the terminal base 1108 located on one side of a middle cover 2, the extension 1104a is welded with a first terminal 1106a of the first lead 1106a of the first terminal 1106, the terminal base 1108 is located on one side of the middle cover 2, a slot 204 is formed by a notch of the middle cover 2 and the middle cover 2 for passing through the first terminal 1106 to be welded with the first terminal 1106b of the first terminal 1101, the first terminal 1108 b of the pole static contact 1101 is installed on one side of the middle cover 2, the terminal base 1108 is installed on one side of a shaft cover 14, and a cover 14 is installed on one side of a shaft 14, and a cover 14, which are installed on a side of a cover 14 of a shaft 14, and a cover 14, which is installed on a cover 14, and a cover 14, which is installed on a structure of a terminal base which is installed on a side of a terminal base which is installed.

As shown in fig. 12a, 12b and 12c, the second connection terminal 1105 includes a connection screw 1105a, a connection frame 1105b and a protection sleeve 1105c, in this embodiment, the protection sleeve 1105c is an insulating member, a screw hole 1105b01 into which the connection screw 1105a can be screwed is arranged on the top of the connection frame 1105b, and the connection screw 1105a is used for plugging a lead or a bus bar of the feeding channel 1105b 02; a blocking piece 1105d is arranged at the bottom of the wire frame 1105b, and the blocking piece 1105d and the wire frame 1105b are integrated. The baffle plate 1105d is embedded in the mounting groove 1105c01 of the protective sleeve 1105c and is fixedly mounted by a boss limit structure; in this embodiment, the boss limiting structure includes a boss 1105d01 on an inner side surface of the stopper 1105d, a mounting hole 1105c02 corresponding to the boss 1105d01 is provided on an inner side wall of a mounting groove 1105c01 on the shield 1105c, and a guide notch 1105c03 corresponding to the mounting hole 1105c02 is provided on an inner side wall of the mounting groove 1105c 01; the boss 1105d01 and the mounting hole 1105c02 are in interference fit; the outer side wall of the mounting groove 1105c01 of the protecting jacket 1105c covers the blocking sheet 1105 d;

as shown in fig. 10a, 10b, 10c and 10d, the N-pole mechanism 8 includes a contact holder 802, the contact holder 802 is sleeved on the contact holder mounting shaft 101 of the housing 1 and can rotate around the contact holder mounting shaft 101, one side end of the contact holder 802 is provided with one end of a contact holder shaft 802a, the other end of the contact holder shaft 802a is embedded on the L-pole mechanism, when the switch is switched on and off, the L-pole mechanism drives the contact holder 802 to rotate around the contact holder mounting shaft 101 through the contact holder shaft 802a, the N-pole static contact of the N-pole structure is installed at the upper right corner of the housing and directly linked through a L-pole mechanism, so as to simplify the process, reduce the cost and improve the efficiency, as shown in fig. 4, the L-pole mechanism 5 includes a L-pole handle 51, a L-pole connecting rod 52, a L-pole jumper 53, a 732-pole mechanism holder 55, a 633-pole jumper 56, a L-pole mechanism holder 57 with a L-pole movable contact, a L-pole jumper 55, a pole jumper 54 is embedded on the pole mechanism holder 55, and a linkage mechanism cover capable of being matched with a N pole 898 and a through hole 898;

specifically, a moving contact mounting groove 802b is formed in the contact seat 802, a moving contact 803 extends into the moving contact mounting groove 802b, a moving contact shaft 803a is arranged in the moving contact mounting groove 802b and can rotate around the moving contact shaft 803a, one end side of the moving contact 803 extending into the moving contact mounting groove 802b, a shell 1 and the moving contact 803 are provided with a moving contact limiting structure, the moving contact limiting structure and an elastic element 804 connected to the moving contact 803 can enable the moving contact 803 to form a dead point position with the contact seat 802 during opening, when the moving contact is closed, the moving contact limiting structure and the elastic element 804 provide final pressure for the moving contact 803, in the embodiment, the moving contact limiting structure comprises a kidney-shaped hole 803b formed in one end side of the moving contact mounting groove 802b, a limiting hole 802c corresponding to the kidney-shaped hole 803b on the contact seat 802 and a limiting shaft 102 embedded on the shell 1, one end of the limiting shaft 102 is embedded in a kidney-shaped hole 802f formed in two side walls of a positioning hole 802b, a baffle 802c embedded in the moving contact seat 802b is arranged in the positioning hole 802b, a baffle 802b, a rotating shaft 802b is arranged in a rotating shaft 802b, a baffle 802b is arranged in a rotating shaft 802b, a rotating shaft hole 802b embedded in an operating mechanism, a rotating shaft hole 357 is arranged in a rotating shaft 802d arranged in a rotating shaft 802b, and a rotating shaft hole 802d of a rotating shaft 802b is arranged in a rotating shaft 802b, and a rotating shaft mounted in a rotating shaft hole on a rotating shaft 802b of a rotating contact mounting shaft 802, and a rotating shaft 802b, a rotating shaft mounted on a rotating shaft 802b is arranged in.

As shown in fig. 5,6, 7 and 8, the leakage mechanism 9 comprises a leakage handle 903, a leakage connecting rod 904, a leakage jump buckle 905, a leakage mechanism seat 907 embedded with a leakage linkage shaft 906, a leakage lock 908, a leakage energy storage spring 909 and a leakage elastic blocking piece 910, wherein the leakage mechanism seat 907 is installed on the partition plate 7, the linkage shaft 906 passes through a first through hole on the partition plate 7 and a second through hole on the middle cover 2 and is matched with a groove of the L pole mechanism 5, the first through hole and the second through hole are in the same vertical direction, the leakage jump buckle 905 and the leakage lock 908 are installed on the leakage mechanism seat 907, the leakage handle 903 and the leakage elastic blocking piece 910 are pivoted on the middle cover 2, two ends of the leakage connecting rod 904 are respectively connected with the leakage handle 903 and the leakage jump buckle 905, and the leakage lock 905 is in disconnectable connection;

when an unbalanced current is detected by a mutual inductor 1102 of an electromagnetic system 11 and reaches a threshold value of the tripping device 10, the tripping device 10 releases and pushes a leakage elastic catch 910 to disconnect a leakage tripping 905 and a leakage locking 908, a leakage mechanism seat 907 and a leakage linkage shaft 906 embedded on the leakage mechanism seat 907 push a L pole mechanism 5 away under the action of a leakage energy storage spring 909 to disconnect a product, so that a leakage protection function is realized, a test loop comprises a test button B1 and a test button B2, a test button B2 is installed on a partition plate 7, one end of a test button B2 is matched with a test button B1, a test button B2 is in contact with a hanging shaft 103 after a user presses a test button B1 to connect the test loop B, in the embodiment, the hanging shaft 103 is embedded on a middle cover 2, an elastic piece 804 is hung, the elastic piece is a tension spring, the hanging shaft 103 penetrates through a through hole I of the partition plate 7 to be matched with an upper cover 14, the hanging shaft 103 is preferably a circular shaft, the hanging shaft 103 is embedded on the middle cover 2, the test button B is matched with an elastic piece 804, a test button B, a switch is preferably made of a metal handle, the switch-on the leakage mechanism, the leakage mechanism is matched with a non-open-contact handle, the leakage mechanism is used for observing a short-open-contact mechanism, and a short-open.

The structure, ratio, size and the like shown in the drawings attached to the present embodiment are only used for matching with the disclosure of the specification, so as to be known and read by those skilled in the art, and are not used to limit the practical limit condition of the present invention, so that the present invention does not have the essential meaning in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered to be the scope of the present invention without substantial changes in the technical content.

Claims (7)

1. An N-pole mechanism of a residual current circuit breaker is characterized in that the N-pole mechanism (8) comprises a contact seat (802), the contact seat (802) is sleeved on a contact seat mounting shaft (101) on a shell (1) and can rotate around the contact seat mounting shaft (101), one end of a contact seat shaft (802a) is installed at one side end of the contact seat (802), the other end of the contact seat shaft (802a) is embedded on an L-pole mechanism, and when a brake is closed and opened, a L-pole mechanism drives the contact seat (802) to rotate around the contact seat mounting shaft (101) through the contact seat shaft (802 a);

the contact seat (802) is provided with a moving contact mounting groove (802b), and the moving contact (803) extends into the moving contact mounting groove (802b) and is arranged in the moving contact mounting groove (802b) by using a moving contact shaft (803a) and can rotate around the moving contact shaft (803 a).

2. An N-pole mechanism of a residual current circuit breaker, as claimed in claim 1, characterized in that: one end side of the moving contact (803) extending into the moving contact mounting groove (802b) and the shell (1) and the moving contact (803) are provided with a moving contact limiting structure, the moving contact limiting structure and an elastic piece (804) connected to the moving contact (803) can enable the moving contact (803) to form a dead point position with the contact base (802) during opening, and during closing, the moving contact limiting structure and the elastic piece (804) provide final pressure for the moving contact (803).

3. An N-pole mechanism of a residual current circuit breaker, as claimed in claim 2, characterized in that: the moving contact limiting structure comprises a moving contact (803) extending into a kidney-shaped hole (803b) in one end side of the moving contact mounting groove (802b), a limiting hole (802c) corresponding to the kidney-shaped hole (803b) in the contact seat (802) and a limiting shaft (102) embedded in the shell (1), wherein the limiting shaft (102) penetrates through a positioning hole (802f) formed in the contact seat mounting groove (101), the limiting hole (802c) and the kidney-shaped hole (803b), and the tail end of the limiting shaft is fixedly mounted in a partition plate (7) in the shell (1).

4. An N-pole mechanism of a residual current circuit breaker, as claimed in claim 1, characterized in that: the contact seat (802) is V-shaped, a turning position on the contact seat (802) is provided with a rotating hole (802d), the rotating hole (802d) is sleeved on the contact seat mounting shaft (101), a contact seat shaft (802a) is arranged in a contact seat shaft hole (802e) at one side end of the contact seat (802), and two ends of a moving contact shaft (803a) penetrating through a moving contact (803) are fixedly arranged in holes on two side walls of the moving contact mounting groove (802 b).

5. An N-pole mechanism of a residual current circuit breaker, as claimed in claim 2, characterized in that: one end of the elastic element (804) is hung in a hanging hole (803c) on the moving contact (803), and the other end is installed on a hanging shaft (103) on the shell (1).

6. An N-pole mechanism of a residual current circuit breaker, as claimed in claim 1, characterized in that the centre of rotation of the contact block (802) and the centre of rotation of the L-pole mechanism are concentric.

7. The N-pole mechanism of the residual current circuit breaker is characterized in that one end of the contact seat shaft (802a) embedded on the L-pole operating mechanism penetrates out of a through hole in the shell (1).

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