CN211828654U - Circuit breaker with adjustable short-circuit protection rated current - Google Patents

Abstract

The utility model discloses a circuit breaker with adjustable short-circuit protection rated current, which comprises a circuit breaker shell, wherein an armature and a supporting seat are arranged inside the circuit breaker shell, a rotating shaft is arranged on the supporting seat, an adjusting knob for driving the rotating shaft to rotate is arranged on the supporting seat, and the rotating shaft is connected with the armature through a spring; because the device utilizes the spring to be connected pivot and armature, drives the rotation of pivot through adjust knob, increase or reduce the pulling force of spring pulling armature to reduce or increase circuit breaker short circuit protection rated current value, and then make the circuit breaker can satisfy the user demand under different occasions and the different environment.

Description

Circuit breaker with adjustable short-circuit protection rated current

Technical Field

The utility model relates to a circuit breaker technical field specifically is a circuit breaker with adjustable short-circuit protection rated current.

Background

The existing circuit breaker is characterized in that one end of a spring is connected with a circuit breaker shell, the other end of the spring is connected with an armature, and due to the connection mode, magnetic force generated when the circuit breaker is opened is limited when the circuit breaker leaves a factory, so that the circuit breaker cannot be adjusted in a matching manner according to actual needs when used in the later period, and the use of the circuit breaker is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker with adjustable short-circuit protection rated current to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a circuit breaker with adjustable short-circuit protection rated current comprises a circuit breaker shell, wherein an armature and a supporting seat are arranged in the circuit breaker shell; the supporting seat is provided with a rotating shaft and an adjusting knob for driving the rotating shaft to rotate; the rotating shaft is connected with the armature through a spring.

Furthermore, the cross section of the armature is T-shaped, and a round hole for suspending a spring is formed in one end, far away from the shell of the circuit breaker, of the armature.

Furthermore, a suspension hole for fixing the spring is formed in the armature, a base is further arranged on the armature, and a hemisphere is arranged on the upper surface of the base.

Furthermore, the adjusting knob comprises a driving rod, a limiting disc and a positioning disc are arranged on the driving rod, a notch is further formed in the circumferential surface of the limiting disc, and a protrusion is arranged on the lower surface of the limiting disc.

Furthermore, an inclined plane is arranged at one end of the positioning disc connected with the armature, and a hemispherical groove is arranged on the inclined plane, wherein the hemispherical groove is connected with the hemispherical body in a matching manner.

Furthermore, the rotating shaft fixing device further comprises an end cover used for fixing the rotating shaft on the supporting seat, the adjusting knob is installed on the end cover through a gap between the positioning plate and the limiting plate, and the protrusion is in contact with the upper surface of the end cover.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: because the device utilizes the spring to be connected pivot and armature, drives the rotation of pivot through adjust knob, increase or reduce the pulling force of spring pulling armature to reduce or increase circuit breaker short circuit protection rated current value, and then make the circuit breaker can satisfy the user demand under different occasions and the different environment.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic view of the structure of the adjusting knob mounted on the supporting base;

fig. 4 is a schematic view of the main structure of the adjusting knob of the present invention;

fig. 5 is a schematic view of the main structure of the rotating shaft of the present invention.

In the figure: 1. adjusting a knob; 10. a drive rod; 11. a limiting disc; 12. a protrusion; 13. positioning a plate; 14. a hemispherical groove; 15. a notch; 16. a bevel; 2. an end cap; 3. a rotating shaft; 30. a hanging hole; 31. a base; 32. a hemisphere; 4. a supporting seat; 5. a circuit breaker housing; 6. an armature; 7. a circular hole; 8. a bump; 9. a drawbar.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-2, the present invention provides an embodiment: a breaker with adjustable short-circuit protection rated current comprises a breaker shell 5, wherein an armature 6 and a supporting seat 4 are arranged in the breaker shell 5; the supporting seat 4 is provided with a rotating shaft 3 and an adjusting knob 1 for driving the rotating shaft 3 to rotate; the rotating shaft 3 is connected with the armature 6 through a spring.

According to the technical scheme, the rotating shaft 3 is connected with the armature 6 through the spring, the rotating shaft 3 is driven to rotate through the adjusting knob 1, and the pulling force of the spring for pulling the armature 6 is increased or reduced, so that the rated current of the breaker during opening is reduced or increased, and the breaker can meet the use requirements of different occasions and different environments;

the utility model discloses a theory of operation is: when the rated current is exceeded, the current flows through a magnetic yoke and the armature 6 to generate magnetic drive, so that the armature 6 pushes a draw bar 9 on the circuit breaker to realize tripping of the circuit breaker; namely, the magnetic driving force generated when the rated action current value is reached is larger than the pulling force of the spring so as to drive the armature 6 to push the traction rod 9, and then the tripping of the circuit breaker is realized.

In order to further optimize the structure of the armature 6, the cross section of the armature 6 is T-shaped, and a round hole 7 for suspending a spring is arranged at one end, far away from the breaker shell 5, of the armature 6, and the suspension of the spring is more convenient and simpler due to the arranged round hole 7.

As shown in fig. 1, 2, 3 and 5, in order to further facilitate the suspension of the other end of the spring, a suspension hole 30 for fixing the spring is provided on the armature 6, a base 31 is further provided on the armature 6, and a hemisphere 32 is provided on the upper surface of the base 31.

As shown in fig. 4, the adjusting knob 1 includes a driving rod 10, and a limiting disc 11 and a positioning disc 13 are disposed on the driving rod 10, wherein a notch 15 is further disposed on the circumferential surface of the limiting disc 11, and a protrusion 12 is disposed on the lower surface of the limiting disc 11, and the rotation of the driving rod 10 can drive the limiting disc 11 and the positioning disc 13 to rotate, and the protrusion 12 can increase the friction force when the limiting disc 11 rotates.

The inclined surface 16 is arranged at one end of the positioning disc 13 connected with the armature 6, and the inclined surface 16 is provided with a semispherical groove 14, wherein the semispherical groove 14 is in adaptive connection with the hemispheroid 32, the base 31 can be pushed and guided to rotate under the driving of the adjusting knob 1 by utilizing the arranged inclined surface 16, and the base rotates along the inclined surface 16, so that the rotating shaft 3 rotates anticlockwise when the adjusting knob 1 rotates clockwise, when the adjusting knob 1 rotates anticlockwise, the rotating shaft 3 rotates clockwise, and then the spring is tensioned or loosened, and after the arranged semispherical groove 14 is connected with the hemispheroid 32, the positioning after the rotating shaft 3 rotates can be realized.

As shown in fig. 3, an end cover 2 is arranged on the support seat 4, the adjusting knob 1 is mounted on the end cover 2 through a gap between the positioning plate 13 and the limiting plate 11, and the protrusion 12 is in contact with the upper surface of the end cover 2; through the technical scheme, the cover plate 2 can fix the rotating shaft 3 on the supporting seat 4 and can install the adjusting knob 1, so that the inner space of the breaker shell 5 is greatly saved, meanwhile, the friction between the protrusions 12 and the upper surface of the end cover 2 is utilized, the problem of idling or positioning failure after the adjusting knob 1 rotates can be solved, meanwhile, the convex block 8 is further arranged on the cover plate 2, the convex block 8 is located in the notch 15, further limitation is achieved between the rotating intervals of the adjusting knob 1, therefore, the rotating shaft 3 is effectively controlled in axial rotation, and the precision of rated current adjustment of the device is greatly improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. The utility model provides a circuit breaker with adjustable short-circuit protection rated current which characterized in that: the circuit breaker comprises a circuit breaker shell (5), and an armature (6) and a supporting seat (4) are arranged in the circuit breaker shell (5);

the supporting seat (4) is provided with a rotating shaft (3) and an adjusting knob (1) for driving the rotating shaft (3) to rotate;

the rotating shaft (3) is connected with the armature (6) through a spring.

2. A short-circuit protection rated-current adjustable circuit breaker according to claim 1, characterized in that: the cross section of the armature iron (6) is T-shaped, and a round hole (7) for hanging a spring is formed in one end, far away from the breaker shell (5), of the armature iron (6).

3. A short-circuit protection rated-current adjustable circuit breaker according to claim 1 or 2, characterized in that: the suspension hole (30) for fixing the spring is formed in the armature (6), the base (31) is further arranged on the armature (6), and the hemisphere (32) is arranged on the upper surface of the base (31).

4. A short-circuit protection rated-current adjustable circuit breaker according to claim 3, characterized in that: adjusting knob (1) includes actuating lever (10), and be equipped with spacing dish (11) and positioning disk (13) on actuating lever (10), wherein still be equipped with breach (15) on the periphery of spacing dish (11), and the lower surface of spacing dish (11) is equipped with arch (12).

5. A short-circuit protection rated-current adjustable circuit breaker according to claim 4, characterized in that: an inclined plane (16) is arranged at one end, connected with the armature (6), of the positioning disc (13), a hemispherical groove (14) is formed in the inclined plane (16), and the hemispherical groove (14) is in adaptive connection with the hemisphere (32).

6. A short circuit protection rated current adjustable circuit breaker according to claim 5, characterized in that: the fixing device is characterized by further comprising an end cover (2) used for fixing the rotating shaft (3) on the supporting seat (4), the adjusting knob (1) is installed on the end cover (2) through a gap between the positioning disc (13) and the limiting disc (11), and the protrusion (12) is in contact with the upper surface of the end cover (2).

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