Electromagnetic release and circuit breaker

Abstract

The utility model relates to an electromagnetic release and a circuit breaker. The electromagnetic release comprises a base, a reset button vertically and movably arranged on the base, a support arranged on the base, a rocker arm vertically and rotatably arranged on the support, a push rod arranged on the base in a front-and-back sliding mode, and a push rod spring elastically abutted between the push rod and the base in a front-and-back mode. Wherein one end of the rocker arm is in transmission connection with the reset button, and the other end of the rocker arm is in transmission connection with the push rod; limiting bosses are arranged on the bottom sides of the push rods. Compared with the prior art, the limiting boss is arranged on the bottom side of the push rod, and the limiting boss abuts against the outer side of the base to resist inward thrust of the lever to the push rod, so that the push rod is prevented from being stressed and deformed.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to an electromagnetic release and a circuit breaker. Background Art

[0002] Chinese patent CN201010172820.0 discloses a residual current release, which has a compact structure and sensitive response. It can be reset by resetting the circuit breaker mechanism or manually reset by pressing a reset button. Figure 5 As shown, the push rod is stuck in the U-shaped groove of the yoke, and the push rod slides along the X direction. When the mechanism is buckled again, the push rod is subjected to the force of the mechanism lever and the fourth push rod spring, which causes the push rod to deform in the Z direction (as shown in FIG. Figure 1 As shown in the figure, the push rod needs to be thickened and materials with good toughness need to be used during the design, which greatly increases the use space and cost. Utility Model Content

[0003] The utility model aims to provide an electromagnetic release and a circuit breaker which can prevent a push rod from being deformed by the thrust of a lever.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] An electromagnetic release comprises a base, a reset button arranged on the base for vertical movement, a bracket arranged on the base, a rocker arm arranged on the bracket for vertical rotation, a push rod arranged on the base for forward and backward sliding, and a push rod spring elastically abutting between the push rod and the base;

[0006] One end of the rocker arm is connected to the reset button, and the other end is connected to the push rod.

[0007] A lever re-engagement surface is provided on the outer side of the push rod, and the lever on the mechanism assembly in the circuit breaker can push the push rod backward by abutting against the lever re-engagement surface during the rotation process;

[0008] A limiting boss is provided on the bottom side of the push rod, and the limiting boss can abut against the outer side of the base to resist the inward thrust of the lever on the push rod.

[0009] Furthermore, the rocker arm includes a rotating collar, and a first transmission part and a second transmission part connected to two sides of the rotating collar;

[0010] The reset button is provided with a slot, and the first transmission part is slidably embedded in the slot;

[0011] A rocker arm re-engaging surface is provided on the push rod, and the second transmission part is rotatably embedded in the rocker arm re-engaging surface.

[0012] Furthermore, the slot extends in a transverse direction, and the first transmission part is a transversely bent L-shaped rocker arm, and the L-shaped rocker arm is embedded in the slot at a distal end relative to the rotating ring.

[0013] Further, the second transmission part includes a connecting rod connected to the rotating collar, and a disc-shaped sliding end provided at the end of the connecting rod;

[0014] The rocker arm re-engagement surface is matched with the disc-shaped sliding end so that the disc-shaped sliding end can slide and rotate in the rocker arm re-engagement surface.

[0015] Furthermore, the rocker arm is rotatably mounted on the bracket via a rotating shaft passing through a rotating collar.

[0016] Furthermore, the bracket includes a vertically bent portion, and the rotating ring is rotatably disposed on the bent portion.

[0017] Furthermore, a stopper bent vertically downward is provided at the front end of the push rod, a fixed stopper is provided on the base in front of the stopper, and the push rod spring elastically abuts between the stopper and the fixed stopper.

[0018] Furthermore, the lever buckle surface is a rear side surface of a boss outside the front end of the push rod.

[0019] Furthermore, the top of the reset button is cylindrical.

[0020] A circuit breaker comprises the electromagnetic release as described above.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] On the basis of the existing electromagnetic release, the utility model arranges a limiting boss on the bottom side of the front end of the push rod, and utilizes the limiting boss to abut against the outer side of the base to resist the inward thrust of the lever on the push rod, thereby preventing the push rod from being deformed by force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the force analysis diagram of the prior art push rod;

[0024] Figure 2 A schematic diagram of a partial structure of a circuit breaker in an embodiment;

[0025] Figure 3 , Figure 4 , Figure 8 It is a structural schematic diagram of the electromagnetic release in the embodiment;

[0026] Figure 5 is a schematic diagram of the structure of the push rod;

[0027] Figure 6 It is a structural schematic diagram of the rocker arm;

[0028] Figure 7 It is a schematic diagram of the structure of the reset button;

[0029] Fig. 9 It is a force analysis diagram of the push rod in the embodiment;

[0030] Fig.10 It is a schematic diagram of the assembly structure of the lever and the electromagnetic release in the embodiment;

[0031] Description of the markings in the figure:

[0032] 1 is a base, 2 is a mechanism component, 21 is a lever, 3 is an electromagnetic device, 31 is a base, 4 is a push rod, 41 is a lever buckle surface, 42 is a rocker arm buckle surface, 43 is a limit boss, 5 is a magnetic flux component, 6 is a rocker arm, 61 is a first transmission part, 62 is a second transmission part, 7 is a reset button, 71 is a slot, 8 is a bracket, 81 is a bending part, and 9 is a push rod spring. DETAILED DESCRIPTION

[0033] The following embodiments are implemented based on the above technical solution of the utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] Example:

[0037] like Figure 1 A circuit breaker shown includes an electromagnetic release device that can prevent the push rod from being deformed by the thrust force inside the lever. The electromagnetic release device includes a base 31, a reset button 7 vertically movable on the base 31, a bracket 8 arranged on the base 31, a rocker arm 6 vertically rotatable on the bracket 8, a push rod 4 sliding forward and backward on the base 31, and a push rod spring 9 elastically abutting between the push rod 4 and the base 31; one end of the rocker arm 6 is transmission-connected to the reset button 7, and the other end is transmission-connected to the push rod 4. The outer side of the front end of the push rod 4 is provided with a lever re-locking surface 41. The lever 21 on the mechanism assembly 2 in the circuit breaker can push the push rod 4 backward by abutting against the lever re-locking surface 41 during the rotation process (combined with Fig.10); a limiting boss 43 is provided at the bottom of the front end of the push rod 4, and the limiting boss 43 can abut against the outer side of the base 31 to resist the inward thrust of the lever 21 on the push rod 4. In this embodiment, the rocker arm 6 includes a rotating collar, and a first transmission part 61 and a second transmission part 62 connected to both sides of the rotating collar; a slot 72 is provided on the reset button 7, and the first transmission part 61 is slidably embedded in the slot 72; a rocker arm re-locking surface 42 is provided on the push rod 4, and the second transmission part 62 is rotatably embedded in the rocker arm re-locking surface 42.

[0038] In this embodiment, the slot 72 extends in the transverse direction, and the first transmission portion 61 is a transversely bent L-shaped rocker arm. The far end of the L-shaped rocker arm relative to the rotating ring is embedded in the slot 72 .

[0039] In this embodiment, the second transmission part 62 includes a connecting rod connected to the rotating ring, and a disc-shaped sliding end arranged at the end of the connecting rod; the rocker arm re-locking surface 42 is adapted to the disc-shaped sliding end so that the disc-shaped sliding end can slide and rotate within the rocker arm re-locking surface 42.

[0040] In this embodiment, the rocker arm 6 is rotatably mounted on the bracket 8 via a rotating shaft passing through a rotating collar.

[0041] In this embodiment, the bracket 8 includes a vertically bent portion 81 , and the rotating ring is rotatably disposed on the bending portion 81 .

[0042] In this embodiment, a stopper bent vertically downward is provided at the front end of the push rod 4, a fixed stopper is provided on the base 31 in front of the stopper, and the push rod spring 9 elastically abuts between the stopper and the fixed stopper.

[0043] In this embodiment, the lever buckle surface 41 is a rear side surface of a boss outside the front end of the push rod 4 .

[0044] In this embodiment, the top of the reset button 7 is cylindrical.

[0045] Working principle:

[0046] like Figure 2 As shown, the mechanism assembly 2 and the electromagnetic device 3 are installed in the base 1, and the mechanism assembly 2 also includes a lever 21;

[0047] like Figure 3 and Figure 4 In the structure of the electromagnetic device 3 shown, the bracket 8 is installed on the base 31, the magnetic flux component 5 is fixedly arranged in the bracket 8, the bracket 8 includes a bending portion 81, the bending portion 81 is bent upward on the side of the bracket 8, the rocker arm 6 is rotatably arranged on the bending portion 81, the rotation axis is perpendicular to the bending surface, and the reset button 7 is arranged on the front side of the base 31 and can slide up and down.

[0048] The push rod 4 is arranged between the bracket 8 and the base 31, and can slide forward and backward. The push rod spring 9 is arranged below the push rod 4. The fixed side of the push rod spring 9 abuts against the base 31, and the force-applying side abuts against the push rod 4, giving the push rod 4 a push rod spring force that pushes forward.

[0049] like Figure 7 The reset button 7 shown in FIG. 1 has a card slot 72. Figure 6 The rocker arm 6 shown has a first transmission part 61 and a second transmission part 62, and the first transmission part 61 cooperates with the slot 72;

[0050] like Figure 5 As shown, the push rod 4 has a lever re-engaging surface 41 and a rocker arm re-engaging surface 42 , the lever re-engaging surface 41 cooperates with the lever 21 , and the rocker arm re-engaging surface 42 cooperates with the second transmission part 62 .

[0051] The push rod 4 also has a limiting boss 43, which is arranged below the lever buckle surface 41 and extends downward, as shown in FIG8, and conflicts with the left side of the base 31.

[0052] When using the reset button 7 to buckle again, press the reset button 7, the reset button 7 slides downward, the card slot 72 cooperates with the first transmission part 61 to rotate the rocker arm 6, and the second transmission part 62 cooperates with the rocker arm buckle surface 42 to make the push rod 4 slide backward and buckle again.

[0053] When the lever 21 is used to buckle again, the lever 21 rotates backward and cooperates with the lever buckle surface 41, the push rod 4 slides backward and buckles again. At this time, the push rod 4 is subjected to the buckle force Fa of the lever 21 and the push rod spring force Fb of the push rod spring 9. Due to the different force points, a torque is generated, which tends to deform toward the inside of the electromagnetic device 3. At this time, the limiting boss 43 of the push rod 4 conflicts with the left side of the base 31, giving the push rod 4 an outward positive pressure N, which suppresses the deformation of the push rod 4. Fig. 9 As shown in the force diagram.

[0054] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. An electromagnetic release, characterized in that: The invention comprises a base (31), a reset button (7) vertically movable on the base (31), a bracket (8) arranged on the base (31), a rocker arm (6) vertically rotatable on the bracket (8), a push rod (4) slidably arranged on the base (31), and a push rod spring (9) elastically abutting between the push rod (4) and the base (31) in the front and rear directions; One end of the rocker arm (6) is connected to the reset button (7) in a transmission manner, and the other end is connected to the push rod (4) in a transmission manner. The push rod (4) is provided with a lever re-engaging surface (41) on the outer side, and the lever (21) on the mechanism assembly (2) in the circuit breaker can push the push rod (4) backward by abutting against the lever re-engaging surface (41) during the rotation process; A limiting boss (43) is provided on the bottom side of the push rod (4), and the limiting boss (43) can abut against the outer side of the base (31) to resist the inward thrust of the lever (21) on the push rod (4).

2. The electromagnetic release according to claim 1, characterized in that: The rocker arm (6) comprises a rotating collar, and a first transmission part (61) and a second transmission part (62) connected to two sides of the rotating collar; The reset button (7) is provided with a slot (72), and the first transmission part (61) is slidably embedded in the slot (72); The push rod (4) is provided with a rocker arm locking surface (42), and the second transmission part (62) is rotatably embedded in the rocker arm locking surface (42).

3. The electromagnetic release according to claim 2, characterized in that: The clamping groove (72) extends in the transverse direction, and the first transmission part (61) is a transversely bent L-shaped rocker arm. The far end of the L-shaped rocker arm relative to the rotating ring is embedded in the clamping groove (72).

4. The electromagnetic release according to claim 2, characterized in that: The second transmission part (62) comprises a connecting rod connected to the rotating collar, and a disc-shaped sliding end arranged at the end of the connecting rod; The rocker arm re-engagement surface (42) is matched with the disc-shaped sliding end so that the disc-shaped sliding end is slidably and rotatably arranged in the rocker arm re-engagement surface (42).

5. The electromagnetic release according to claim 2, characterized in that: The rocker arm (6) is rotatably mounted on the bracket (8) via a rotating shaft passing through a rotating sleeve.

6. The electromagnetic release according to claim 5, characterized in that: The bracket (8) comprises a vertically bent bending portion (81), and the rotating sleeve is rotatably arranged on the bending portion (81).

7. The electromagnetic release according to claim 1, characterized in that: A stopper bent vertically downward is provided at the front end of the push rod (4); a fixed stopper is provided on the base (31) in front of the stopper; and the push rod spring (9) elastically abuts between the stopper and the fixed stopper.

8. The electromagnetic release according to claim 1, characterized in that: The lever re-locking surface (41) is arranged on the rear side surface of the outer boss at the front end of the push rod (4).

9. The electromagnetic release according to claim 1, characterized in that: The top of the reset button (7) is cylindrical.

10. A circuit breaker, characterized in that: It comprises the electromagnetic release as claimed in any one of claims 1 to 9.

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