Clapper type circuit breaker

Abstract

The invention discloses a clapper type circuit breaker which comprises a shell, a handle installed on the shell and a tripping mechanism installed in the shell, and the handle is in linkage with the tripping mechanism. A magnet yoke is also arranged in the shell, and an armature is arranged above the magnet yoke; the armature comprises an attraction part, one end of the attraction part is arranged on a supporting shaft arranged on the inner wall face of the shell in a sleeving mode through an arranged shaft pin base, and the armature is promoted to be separated from the magnet yoke in the normal state through an arranged torsional spring. The armature of the equipment is sleeved on the supporting shaft in the shell through the shaft pin seat, and the armature is promoted to be separated from the magnet yoke in a normal state through the torsion spring, so that on one hand, the number of limiting parts for limiting the position of the armature is reduced, the internal structure of the shell is optimized, and the assembling efficiency of the equipment can be improved; and 2, the number of the limiting parts is reduced, so that the processing difficulty and complexity of the shell are reduced, and the production cost of equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, in particular to a snap-on type circuit breaker. Background Art

[0002] The structure of the existing snap-on electromagnetic circuit breaker, such as the prior art with announcement number CN117038411A, is generally as follows: it at least includes: a housing, a switch contact, which is rotatably arranged on the housing and has an open state and a closed state; and a tripping mechanism, which is arranged in the housing and is linked to the switch contact; wherein the tripping mechanism includes: a lock, which is rotatably arranged in the housing; a yoke, which is installed in the housing and fixed relative to the housing; an armature, which is movably arranged on one side of the yoke and has an attraction section for attracting the yoke and a contact section for contacting the lock; and a tension spring, one end of which is hooked on the housing and the other end is hooked on the armature; and the housing is provided with a plurality of fixing points for hooking the tension spring.

[0003] From this content and in combination with the accompanying drawings, it can be clearly found that the yoke and the armature, as well as the tension spring used to cause the armature to separate from the yoke under normal conditions, are arranged relatively crowded inside the shell, and in order to achieve a structure where the armature can be closed and opened smoothly, multiple limit parts are required to cooperate. Since there are many points of cooperation, once the armature moves slightly, it is very easy to cause the armature to fail to work, and one end of the armature is prone to getting stuck when rotating in the limit part. Summary of the invention

[0004] The object of the present invention is to provide a snap-on circuit breaker to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a snap-on circuit breaker, comprising a shell, a handle installed on the shell and a tripping mechanism installed in the shell, and the handle is linked to the tripping mechanism; a yoke is also provided inside the shell, and an armature is provided above the yoke; the armature includes a suction part, and one end of the suction part is sleeved on a support shaft provided on the inner wall surface of the shell through a shaft pin seat, and the armature is urged to separate from the yoke under normal conditions through a torsion spring.

[0006] As a preferred technical solution of the present invention: a limiting portion is further provided inside the shell; wherein one end of the torsion spring is connected to the limiting portion, and the other end of the torsion spring abuts against the suction portion.

[0007] As a preferred technical solution of the present invention: a side of the limiting portion facing the yoke is further provided with a limiting groove, and the number of the limiting grooves is multiple.

[0008] As a preferred technical solution of the present invention: a limiting column for limiting the further rotation of the armature is further provided inside the housing.

[0009] As a preferred technical solution of the present invention: the suction part contacts the release mechanism through a push part; wherein the push part is arc-shaped, and a through hole is also provided on the suction part.

[0010] As a preferred technical solution of the present invention: the yoke includes a base installed inside the housing and a static contact installed on the base, and the base is riveted to the static contact after a rivet provided on the base passes through the static contact.

[0011] As a preferred technical solution of the present invention: an arc-starting plate is further provided at one end of the static contact, a contact is provided on the arc-starting plate, and a notch is further provided on a side of the arc-starting plate facing the contact.

[0012] As a preferred technical solution of the present invention: the tripping mechanism includes a contact bracket and a moving contact rotatably mounted on the contact bracket; wherein, an axial hole is provided on one side of the contact bracket, and an axial pin rod is provided at the center of the axial hole, and the moving contact is sleeved on the axial pin rod through the provided circular hole.

[0013] As a preferred technical solution of the present invention: an avoidance groove is further provided on the shaft hole, and one side of the avoidance groove contacts the moving contact through a limiting surface.

[0014] As a preferred technical solution of the present invention: a resistance surface is further provided on the other side of the avoidance groove, and a mounting groove is further provided on the moving contact.

[0015] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: since the armature of the device is sleeved on the support shaft in the shell by the axle pin seat, and the torsion spring is used to cause the armature to separate from the yoke under normal conditions, firstly, the number of limiting parts for limiting the position of the armature is reduced, thereby optimizing the internal structure of the shell and improving the assembly efficiency of the equipment; secondly, since the number of limiting parts is reduced, the processing difficulty and complexity of the shell are reduced, which is beneficial to reducing the production cost of the equipment; thirdly, the armature is sleeved on the support shaft and then limited to the support shaft by the torsion spring, and then after the two shells are closed to each other, the stability of the armature during operation can be effectively guaranteed, and the axle pin seat rotates on the support shaft, which can solve the problem of the armature being easily stuck in the prior art and effectively solve the problem of the armature being easily failed in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded schematic diagram of the main structure of the present invention;

[0017] Figure 2It is a schematic diagram of the internal structure layout of the housing of the present invention;

[0018] Figure 3 It is a schematic diagram of the main structure of the housing of the present invention;

[0019] Figure 4 for Figure 3 A local enlarged schematic diagram of the middle A;

[0020] Figure 5 It is a schematic diagram of the exploded structure of the armature and the torsion spring of the present invention;

[0021] Figure 6 It is a schematic diagram of the exploded structure of the magnetic yoke of the present invention;

[0022] Figure 7 for Figure 6 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 8 It is a schematic diagram of the exploded structure of the tripping mechanism of the present invention.

[0024] In the figure: 1. shell; 2. handle; 3. tripping mechanism; 30. contact bracket; 31. axle pin rod; 32. axle hole; 33. limit surface; 34. moving contact; 35. contact surface; 36. mounting groove; 37. round hole; 38. avoidance groove; 4. limit part; 5. armature; 50. suction part; 51. axle pin seat; 52. torsion spring; 53. through hole; 54. pushing part; 6. yoke; 60. base; 61. rivet; 62. static contact; 63. contact; 64. arc-starting plate; 65. notch; 7. limit column; 8. limit groove; 9. support shaft. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0026] See also Figure 1-8An embodiment of the present invention is as follows: a snap-on circuit breaker comprises a housing 1, a handle 2 mounted on the housing 1 and a tripping mechanism 3 mounted in the housing 1, and the handle 2 is linked to the tripping mechanism 3; a yoke 6 is further provided inside the housing 1, and an armature 5 is provided above the yoke 6; the armature 5 comprises a suction portion 50, and one end of the suction portion 50 is sleeved on a support shaft 9 provided on the inner wall surface of the housing 1 through a shaft pin seat 51, and the armature 5 is urged to separate from the yoke 6 under normal conditions through a torsion spring 52.

[0027] To sum up, since the armature 5 of the device is sleeved on the support shaft 9 in the shell 1 by the axle pin seat 51, and the torsion spring 52 is used to cause the armature 5 to separate from the yoke 6 under normal conditions, on the one hand, the number of limiting parts used to limit the position of the armature 5 is reduced, thereby optimizing the internal structure of the shell 1 and improving the assembly efficiency of the equipment; secondly, since the number of limiting parts is reduced, the processing difficulty and complexity of the shell 1 are reduced, which is beneficial to reducing the production cost of the equipment; thirdly, the armature 5 is sleeved on the support shaft 9 and then limited to the support shaft 9 by the torsion spring 52, and then after the two shells are closed to each other, the stability of the armature 5 during operation can be effectively guaranteed, and the axle pin seat 51 rotates on the support shaft 9, which can solve the problem of the armature being easily stuck in the prior art and effectively solve the problem of the armature being easily failed in operation.

[0028] Furthermore, since the housing 1 is further provided with a limiting portion 4, one end of the torsion spring 52 is connected to the limiting portion 4, and the other end of the torsion spring 52 abuts against the suction portion 50. Therefore, the torsion spring 52 can be relatively fixed in position by the cooperation between the limiting portion 4 and the suction portion 50, and the suction portion 50 and the yoke 6 can be kept separated under normal conditions by the torsion spring 52.

[0029] Furthermore, since the side of the limiting portion 4 facing the yoke 6 is also provided with a limiting groove 8, and the number of the limiting grooves 8 is multiple, when the end of the torsion spring 52 away from the suction portion 50 is connected to the limiting grooves 8 at different positions, the torsion of the torsion spring 52 can be increased or decreased, so that the user can adjust the fixed position between the torsion spring 52 and the housing 1 according to actual needs, so that the force arm of the torsion spring 52 can be adjusted to be compatible with different suction forces generated by different current specifications, thereby expanding the scope of application of the device. At the same time, the limiting portion 4 is grooved, so that the processing of the limiting groove 8 is simpler and more convenient, thereby reducing the production cost of the equipment. At the same time, the limiting groove 8 is also convenient for the installation of the torsion spring 52 to improve the assembly efficiency of the torsion spring 52.

[0030] At the same time, in order to ensure the reliability of the armature 5 when working, a limit post 7 is further provided inside the housing 1 for limiting the further rotation of the armature 5. Based on this, when one end of the armature 5 contacts the limit post 7, the limit post 7 can prevent the armature 5 from continuing to rotate counterclockwise, thereby effectively avoiding the problem that the armature 5 and the yoke 6 are difficult to contact smoothly due to excessive rotation of the armature 5.

[0031] In addition, the suction part 50 contacts the release mechanism 3 through the push part 54; wherein the push part 54 is arc-shaped, so the arc-shaped push part 54 has small resistance during the pushing process and does not make abnormal noise, especially, it can slow down the wear speed of the push part 54 and the release mechanism 3. Furthermore, since the suction part 50 is also provided with a through hole 53, the through hole 53 can be used to dissipate heat while reducing the deadweight of the armature 5.

[0032] On the basis of the above scheme, the yoke 6 includes a base 60 installed inside the housing 1 and a static contact 62 installed on the base 60, and the base 60 is riveted to the static contact 62 after the rivet 61 provided therein passes through the static contact 62. Since the static contact 62 and the base 60 are riveted together, the static contact 62 can be reliably and stably located on the base 60 to ensure that the static contact 62 will not be displaced during operation. In particular, since the displacement of the static contact 62 can be effectively solved, the sparking phenomenon when the tripping mechanism 3 contacts the static contact 62 can be effectively avoided; based on this, the contact portion between the static contact 62 and the tripping mechanism 3 will not be burned, which can extend the service life of the two while ensuring the stability of the circuit.

[0033] Furthermore, since an arc-starting plate 64 is provided at one end of the static contact 62, and a contact 63 is provided on the arc-starting plate 64, and a slot 65 is provided on a side of the arc-starting plate 64 facing the contact 63, the slot 65 can be used to realize the flow of airflow, thereby quickly releasing the heat generated by the contact 63.

[0034] On the basis of the above scheme, the tripping mechanism 3 includes a contact support 30 and a moving contact 34 rotatably mounted on the contact support 30; wherein, a shaft hole 32 is provided on one side of the contact support 30, and a shaft pin 31 is provided at the center of the shaft hole 32, and the moving contact 34 is sleeved on the shaft pin 31 through a circular hole 37. Based on this, when the circular hole 37 is sleeved on the shaft pin 31, the moving contact 34 can swing on the shaft pin 31, and it is also convenient to install a reset member, such as a torsion spring (not shown in the figure), into the shaft hole 32, so as to use the reset member to force the moving contact 34 to abut against the contact support 30.

[0035] Furthermore, since an avoidance groove 38 is also provided on the shaft hole 32 , and one side of the avoidance groove 38 contacts the moving contact 34 via a limiting surface 33 , the limiting surface 33 of the avoidance groove 38 can be used to block the moving contact 34 .

[0036] Furthermore, a contact surface 35 is provided on the other side of the avoidance groove 38, and a mounting groove 36 is provided on the moving contact 34. Therefore, when one end of the reset member abuts against the contact surface 35 and the other end abuts against the mounting groove 36, the reset member can be used to cause the moving contact 34 to fit reliably on the limiting surface 33.

[0037] In summary, the avoidance groove 38 is set to facilitate the fixation of the reset member while allowing the moving contact 34 to rotate in the direction away from the limiting surface 33, that is, when the moving contact 34 is pressed against the static contact 62, the moving contact 34 can swing in the avoidance groove 38, so that the moving contact 34 and the static contact 62 have a buffer space at the moment of contact, so as to avoid the problem of rigid collision between the moving contact 34 and the static contact 62 causing damage to both.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A snap-on circuit breaker, characterized in that: It comprises a housing (1), a handle (2) mounted on the housing (1), and a tripping mechanism (3) mounted in the housing (1), wherein the handle (2) and the tripping mechanism (3) are linked; A yoke (6) is also provided inside the housing (1), and an armature (5) is provided above the yoke (6); The armature (5) comprises a suction portion (50), and one end of the suction portion (50) is sleeved on a support shaft (9) provided on the inner wall surface of the housing (1) via a shaft pin seat (51), and a torsion spring (52) is provided to urge the armature (5) to separate from the magnetic yoke (6) in a normal state; The yoke (6) comprises a base (60) mounted inside the housing (1) and a stationary contact (62) mounted on the base (60), and the stationary contact (62) is riveted to the base (60) after a rivet (61) is provided through the stationary contact (62).

2. A snap-on circuit breaker according to claim 1, characterized in that: A limiting portion (4) is also provided inside the housing (1); wherein one end of the torsion spring (52) is connected to the limiting portion (4), and the other end of the torsion spring (52) abuts against the suction portion (50).

3. A snap-on circuit breaker according to claim 2, characterized in that: A side of the limiting portion (4) facing the magnetic yoke (6) is also provided with a limiting groove (8), and the limiting grooves (8) are multiple in number.

4. A snap-on circuit breaker according to claim 3, characterized in that: A limiting column (7) for limiting the continued rotation of the armature (5) is also provided inside the housing (1).

5. A snap-on circuit breaker according to claim 4, characterized in that: The suction portion (50) contacts the release mechanism (3) via a provided pushing portion (54); wherein the pushing portion (54) is arc-shaped, and a through hole (53) is also provided on the suction portion (50).

6. A snap-on circuit breaker according to claim 5, characterized in that: An arc-starting plate (64) is also provided at one end of the stationary contact (62), a contact point (63) is provided on the arc-starting plate (64), and a notch (65) is also provided on a surface of the arc-starting plate (64) facing the contact point (63).

7. A snap-on circuit breaker according to any one of claims 1 to 6, characterized in that: The tripping mechanism (3) comprises a contact support (30) and a moving contact (34) rotatably mounted on the contact support (30); wherein an axial hole (32) is provided on one side of the contact support (30), and an axial pin rod (31) is provided at the center of the axial hole (32), and the moving contact (34) is sleeved on the axial pin rod (31) through a circular hole (37) provided thereon.

8. A snap-on circuit breaker according to claim 7, characterized in that: The shaft hole (32) is also provided with an avoidance groove (38), and one side of the avoidance groove (38) is in contact with the moving contact (34) via a provided limiting surface (33).

9. A snap-on circuit breaker according to claim 8, characterized in that: A contact surface (35) is also provided on the other side of the avoidance groove (38), and a mounting groove (36) is also provided on the moving contact (34).

Images