Switch

Abstract

A switch belongs to the technical field of low-voltage apparatus parts. Comprising a shell in which a first accommodating space is formed; the contact system comprises a static contact assembly and a moving contact assembly, the static contact assembly is arranged in the first accommodating space, and the moving contact assembly is arranged in the first accommodating space; the electromagnetic operating mechanism comprises a fixed iron core and a movable iron core; the pair of mounting side plates are fixedly arranged on the shell in a face-to-face manner; the main shaft is arranged on the mounting side plate and is provided with a transmission part; the fixed iron core is arranged on the pair of installation side plates, the movable iron core and the main shaft are fixedly arranged, the fixed iron core and the movable iron core are attracted through excitation of an electromagnetic coil arranged in the fixed iron core, the movable iron core drives the main shaft to rotate in the rotating process, and the transmission component drives the movable contact assembly to make contact with the static contact assembly to achieve closing. The device has the advantages that the structural stability is improved; the pull-in effect of the fixed iron core and the movable iron core is improved, and the closing reliability of the movable contact assembly and the static contact assembly is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliance components, and in particular relates to a switch. Background Art

[0002] As is known in the industry, although the circuit breaker belongs to the aforementioned switch category, it is not an ordinary switch, that is to say, the circuit breaker is a relatively special switching device because it has functions that are not limited to the following: connecting and disconnecting the power supply under normal conditions, and automatically disconnecting the power supply under abnormal conditions such as overload or short circuit, thereby protecting the circuit and the electrical facilities usually called loads; it can automatically trip when a circuit abnormality is detected, thereby preventing the occurrence of dangerous situations, etc.

[0003] Figure 1 is a structural diagram of a switch in the prior art, Figure 2 yes Figure 1 Schematic diagram of the air gap shown by the action of the moving iron core of the structure. Figure 1 As shown, the mounting side plate 30 is mounted on the housing 10, and the electromagnetic operating mechanism 2 (also referred to as an "electromagnetic assembly") consisting of a fixed iron core 21 and a moving iron core 22 is also arranged on the housing 10. Specifically, the fixed iron core 21 constituting the electromagnetic operating mechanism 2 is mounted on the frame or mounted on the housing 10 through a mounting bracket, and the moving iron core 22 constituting the electromagnetic operating mechanism 2 cooperates with the fixed iron core 21.

[0004] In the open state, that is, when the moving iron core 22 is repelled relative to the fixed iron core 21, the electromagnetic coil (hereinafter referred to as "coil") arranged in the moving iron core 22 is de-energized. Under the action of the opening spring, the moving iron core 22 reaches the position of Figure 2 As shown, the first air gap X1 is the largest. After the electromagnetic coil is energized, driven by the electromagnetic attraction, the moving iron core 22 overcomes the reverse force of the mechanism and moves in the striking direction, that is, moves in the direction of the fixed iron core 21 ( Figure 1 In this process, when the moving iron core 22 reaches the position indicated by Figure 2 At the second air gap X2 shown, the movable contact (i.e., moving contact) of the contact system just touches the fixed contact (i.e., stationary contact), and the reaction force generated by the energy storage spring acts between the movable contact of the movable contact and the fixed contact of the fixed contact, and the closing load of the mechanism increases. When the moving iron core 22 contacts the fixed iron core 21, the moving iron core 22 stops running (i.e., the movement ends). After the electromagnetic coil delays for a certain period of time, the power supply is cut off, the electromagnetic attraction disappears, and under the action of the load, the moving iron core 22 moves in the opposite direction and reaches the position determined by the moving iron core 22. Figure 2At the third air gap X3 shown, the moving iron core 22 is limited by the aforementioned locking mechanism and maintained in the closed position. The travel between the third air gap X3 and the first air gap X1 is determined by the contact system, that is, the distance between the third air gap X3 and the first air gap X1 depends on the contact system. Figure 2 The F shown in represents force.

[0005] As mentioned above, since the electromagnetic operating mechanism 2 in the prior art is installed on the frame or on the housing 10 with the aid of a mounting bracket, in the closed state, the fixed iron core 21 exhibits a cantilever beam effect, and thus will produce deflection after being subjected to force, affecting the positioning accuracy of the electromagnetic operating unit, especially after the coil of the fixed iron core 21 is energized, the vertical upward electromagnetic suction force generated on the air gap surface of the fixed iron core 21 is very large, causing the fixed iron core 21 to produce deflection and deformation, thereby causing interference during the closing process, hindering the moving iron core 22 from moving into place, and causing the contact system 2 to not close in place. In addition, the moving iron core 22 is fixedly set on the fixed iron core 21 through a bracket, and the number of parts increases, so the discreteness of the third air gap X3 will be increased during the production process. In order to accommodate or default the errors generated during the production process, the design value of the third air gap is also increased. However, this disposal method has the problem of losing one thing while gaining another, because the electromagnetic suction force is very sensitive to the air gap. As the air gap decreases, the electromagnetic suction force gradually increases, and the electromagnetic suction force is greatly increased near the closed position. For example, increasing the value of the third air gap X3 will reduce the working efficiency of the electromagnetic solenoid, that is, reduce its effective work (working) capacity, which will affect the reliability of closing the switch. Utility Model Content

[0006] The task of the utility model is to provide a switch which helps to improve the attraction effect of the fixed iron core and the moving iron core by reasonably changing the installation positions of the fixed iron core and the moving iron core of the structural system of the electromagnetic operating mechanism, thereby exerting the excitation effect of the electromagnetic coil in the fixed iron core and finally ensuring the closing reliability of the moving contact assembly and the static contact assembly of the contact system driven by the moving iron core.

[0007] The task of the utility model is accomplished in this way: a switch comprises a shell, in which a first accommodating space is formed; a contact system, which comprises a static contact assembly and a moving contact assembly, the static contact assembly is fixedly arranged in the first accommodating space, and the moving contact assembly is rotatably arranged in the first accommodating space; an electromagnetic operating mechanism, which comprises a fixed iron core and a moving iron core; a pair of mounting side plates, which are fixedly arranged on the shell facing each other; a main shaft, which is rotatably arranged on the mounting side plates and is provided with a transmission component for connecting with the moving contact assembly; the fixed iron core is fixedly arranged on the pair of mounting side plates, and the moving iron core is fixedly arranged on the main shaft, and the fixed iron core and the moving iron core are attracted by the excitation of the electromagnetic coil arranged in the fixed iron core, and the moving iron core drives the main shaft to rotate during the rotation process, and the transmission component drives the moving contact assembly to contact with the static contact assembly to achieve closing.

[0008] In the utility model, the shell further includes a second accommodating space separated from the first accommodating space, and the fixed iron core is arranged in the second accommodating space.

[0009] In the utility model, a mounting side plate wing extends from each side of the pair of mounting side plates toward the second accommodating space, and the mounting side plate wing extends into the second accommodating space, and the fixed iron core is fixed to the opposite side of the pair of mounting side plate wing plates.

[0010] In the utility model, fixed iron core fixing holes are respectively opened in the upper and lower parts of the pair of mounting side plate wing plates and at corresponding positions, and fixed iron core holes are respectively opened in the upper and lower parts of the fixed iron core, and the fixed iron core is fixed to the pair of mounting side plate wing plates by fasteners at positions corresponding to the fixed iron core fixing holes and the fixed iron core holes.

[0011] In the utility model, the transmission component includes a first operating arm and a first connecting rod. One end of the first operating arm is fixedly set on the main shaft. The first operating arm is hinged to one end of the first connecting rod away from the main shaft, and the other end of the first connecting rod is hinged to the moving contact assembly.

[0012] In the utility model, a second operating arm is fixedly arranged on the main shaft, the second operating arm is a pair, and the moving iron core is fixedly arranged on the second operating arm.

[0013] In the utility model, a notch portion for accommodating the main shaft is provided on the installation side plate, and the notch portion is adapted to the shape of the main shaft.

[0014] In the utility model, a mounting side plate fixing portion for fixing the mounting side plate on the housing is formed by bending on the mounting side plate and located at the upper and lower sides of the mounting side plate wing plate.

[0015] The technical effect of the technical solution provided by the utility model is that: compared with the prior art, since the fixed iron core of the structural system of the electromagnetic operating mechanism is fixed at a position corresponding to the second accommodating space and on the opposite side of a pair of mounting side plates, the expression of the cantilever beam structure is avoided and the stability of the structure is increased; and since the position of the moving iron core corresponding to the fixed iron core is set on the main shaft rotatably set on the mounting side plate, and the moving iron core is attracted to the fixed iron core by the excitation of the electromagnetic coil set in the fixed iron core, so as to drive the moving contact assembly to contact with the static contact assembly to realize closing, thus by unifying the installation references of the fixed iron core and the moving iron core, the attraction effect of the fixed iron core and the moving iron core can be significantly improved and the closing reliability of the moving contact assembly and the static contact assembly can be finally guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a switch in the prior art;

[0017] Figure 2 for Figure 1 Schematic diagram of the air gap exhibited by the moving iron core of the electromagnetic operating mechanism when the switch of the structure is closed;

[0018] Figure 3 It is a schematic diagram of the air gap shown by the moving iron core of the electromagnetic operating mechanism of the switch of the utility model when the switch is closed;

[0019] Figure 4 A schematic diagram of a switch of the utility model;

[0020] Figure 5 for Figure 4 Schematic diagram with the shell removed;

[0021] Figure 6 for Figure 4 and Figure 5 A schematic diagram showing the fixing of the fixed iron core to the mounting side plate wing plates of a pair of mounting side plates;

[0022] Figure 7 It is a schematic diagram of the moving iron core of the switch of the utility model moving from the open state to the closed state;

[0023] Figure 8 It is a schematic diagram of the moving iron core of the switch of the utility model moving from the closing state to the opening state;

[0024] Fig. 9 It is a schematic diagram of the assembly of the mounting side plate and the main shaft of the switch of the utility model;

[0025] Fig.10 It is a schematic diagram of the first accommodating space and the second accommodating space of the switch of the utility model. DETAILED DESCRIPTION

[0026] See also Figures 4 to 5 , showing a housing 10, in which a first accommodating space 101 is formed; showing a contact system 1, which includes a stationary contact assembly 11 and a moving contact assembly 12, wherein the stationary contact assembly 11 is fixedly arranged in the aforementioned first accommodating space 101, and the moving contact assembly 12 is rotatably arranged in the first accommodating space 101, and the closing or opening of the switch is realized by the rotation of the moving contact assembly 12 relative to the stationary contact assembly 11; showing an electromagnetic operating mechanism 2, which includes a fixed iron core 21 and a moving iron core 22; a pair of mounting side plates 30, which are fixedly arranged on the housing 10 face to face with each other; a main shaft 4, which is rotatably arranged on the mounting side plate 30, and a transmission component for connecting with the moving contact assembly 12 is also arranged on the main shaft 4.

[0027] As the technical key points of the technical solution provided by the utility model: the aforementioned fixed iron core 21 is fixedly arranged on the aforementioned pair of mounting side plates 30, the aforementioned moving iron core 22 is fixedly arranged with the main shaft 4, and the electromagnetic coil 211 ( Figure 7 The excitation of the fixed iron core 21 and the moving iron core 22 is attracted to each other, and the moving iron core 22 drives the main shaft 4 to rotate during the rotation process, and the transmission component drives the aforementioned moving contact assembly 12 to contact the aforementioned static contact assembly 11 to achieve closing.

[0028] The housing 10 further includes a second accommodating space 102 separated from the first accommodating space 101 , and the fixed iron core 21 is disposed in the second accommodating space 102 .

[0029] See also Figure 6 A mounting side panel wing 301 is extended from each of the pair of mounting side panels 30 toward one side of the second accommodating space 102 (i.e., toward the left side), and the mounting side panel wing 301 extends into the second accommodating space 102, and the fixed iron core 21 is fixed to the opposite side of the pair of mounting side panel wing 301.

[0030] See also Fig.10In this embodiment, the switch is 2-pole, the number of the first accommodating spaces 101 is configured as 2, the number of the second accommodating spaces 102 is 1, and the first accommodating spaces 101 are respectively arranged on both sides of the first accommodating cavity 12 and separated by a partition wall. Of course, according to actual needs, if the switch is a single-pole switch, the number of the first accommodating space 101 is configured as 1, and the number of the second accommodating space 102 is 1, then the first accommodating space 101 and the second accommodating space 102 are arranged side by side on the left and right, and the two are separated by a partition wall. If the switch is 3-pole, the number of the first accommodating space 101 is configured as 3, and the number of the second accommodating space 102 is configured as 1, then one first accommodating space 101 and two first accommodating cavities are respectively arranged on both sides of the second accommodating cavity 12, and the first accommodating space 101 and the second accommodating space 102, or adjacent first accommodating spaces 101 are separated by a partition wall. By Figures 4 to 6 As shown, a fixed core fixing hole 3011 is respectively opened at the upper and lower parts of the aforementioned pair of mounting side plate wing plates 301 and at mutually corresponding positions, and a fixed core hole 212 is respectively opened at the upper and lower parts of the aforementioned fixed core 21, and the fixed core 21 is fixed to the pair of mounting side plate wing plates 301 by fasteners at positions corresponding to the fixed core fixing holes 3011 and the fixed core holes 212. In this embodiment, with respect to the pair of mounting side plates 30, the upper and lower parts of the mounting side plate wing plates 301 of each mounting side plate 30 each have two aforementioned fixed core fixing holes 3011, that is, they are arranged in a 2×2 (2 times 2) array, but this is not limited thereto.

[0031] See also Figures 7 and 8 And combined with Figures 4 to 6 The transmission component includes a first operating arm 5 and a first connecting rod 6, one end of the first operating arm 5 is fixedly arranged on the main shaft 4, one end of the first operating arm 5 away from the main shaft 4 is hinged to one end of the first connecting rod 6, and the other end of the first connecting rod 6 is hinged to the moving contact assembly 12. Specifically, the main shaft 4 is rotated around its main shaft fulcrum as the rotation center, one end of the first operating arm 5 away from the main shaft 4 is hinged to one end of the first connecting rod 6 through one end of the first operating arm hinge pin 51, and the other end of the first connecting rod 6 is hinged to the moving contact assembly 12 through the connecting rod hinge shaft 61.

[0032] See also Fig. 9 The mounting side plate 30 is provided with a notch 302 for accommodating the main shaft 4, and the notch 302 is adapted to the shape of the main shaft 4. Specifically, the main shaft 4 is arranged in the notch 302, and the main shaft 4 is arranged on the mounting side plate 30 by the mounting component 8, and the mounting component 8 is usually a clamp.

[0033] The aforementioned switch further comprises a locking mechanism 3 , which comprises a locking rod 31 , a tripping rod 32 , a traction rod 33 , and a reset spring 34 arranged on a mounting side plate 30 .

[0034] The aforementioned moving iron core 22 is disposed on the main shaft 4 . Specifically, the moving iron core 22 is fixedly disposed on the main shaft 4 via the second operating arm 7 . The second operating arm 7 is a pair, and the moving iron core 22 is fixedly disposed on the second operating arm 7 .

[0035] The aforementioned mounting side plate 30 is fixed on the housing 10 in such a way that the mounting side plate fixing portion 303 for fixing the mounting side plate 30 on the housing 10 is formed by bending the upper and lower sides of the mounting side plate wing plate 301 on the mounting side plate 30. The mounting side plate fixing portion 303 is provided with mounting fixing holes, and the mounting side plate 30 is fixed on the housing 10 through these mounting fixing holes. In addition, since the mounting side plate wing plate 301 extends into the second accommodating space 102, and the fixing method of the mounting side plate 30 is in the form of a cantilever beam, there is a certain gap between the upper edge of the mounting side plate wing plate 301 and the upper wall of the second accommodating space 102, so that the second accommodating space 102 can play a certain limiting role on the upper edge of the mounting side plate wing plate 301.

[0036] The aforementioned tripping rod 32 is also sleeved on the aforementioned main shaft 4. A locking pin matching groove 321 for the locking pin 311 of the locking rod 31 to match is formed at the upper end of the tripping rod 32 and on the side facing away from the aforementioned moving iron core 22. When the aforementioned moving iron core 22 and the aforementioned fixed iron core 21 are attracted to make the aforementioned moving contact assembly 12 and the stationary contact assembly 11 in the closed state, the aforementioned locking pin 311 is in the state of matching with the locking pin matching groove 321. Figure 7As shown, a first limiting surface 312 is formed on the aforementioned locking rod 31 and on one side facing the tripping rod 32 , the locking pin 311 is matched or released with the tripping rod 32 , and the first limiting surface 312 corresponds to the traction rod 33 . The closing process is: the electromagnetic coil 211 is energized to generate electromagnetic attraction on the moving iron core 22, and the moving iron core 22 drives the main shaft 4 to rotate counterclockwise by overcoming the counter torque of the opening spring 20, and then drives the first connecting rod 6 through the first operating arm 5 fixed on the main shaft 4 to make the moving contact assembly 12 rotate toward the static contact assembly 11, and store energy for the opening spring 20. When the moving contact assembly 12 contacts the static contact assembly 11, the crimping spring arranged in the moving contact assembly 12 begins to further store energy. When the closing setting position is reached, the locking pin 311 of the locking rod 31 and the locking pin matching groove 321 of the jumper 32 are abutted against the limit. That is to say, the locking rod 31 drives the locking rod 31 to rotate clockwise under the action of the reset spring 34, and the locking pin 311 enters the locking pin matching groove 321. The first limiting surface 312 is further limited by the traction rod 33, and the contact system remains in the closed state after the electromagnetic attraction disappears; the opening process is: applying force to the traction rod 33, that is, hitting the traction rod 33, so that the traction rod 33 rotates counterclockwise, releasing the limit on the lock rod 31, and under the action of the contact crimping spring and the mechanism opening spring 20, the main shaft 4 rotates clockwise, and the locking pin 311 withdraws from the locking pin matching groove 321, driving the moving contact assembly 12 to separate from the static contact assembly 11, and realizing the opening. When the moving contact assembly 12 reaches the set opening position, under the action of the opening spring 20, the contact system remains in the opening state.

[0037] See also Figure 3 ,Depend on Figure 3 After adopting this mechanism, the installation of the fixed iron core 21 and the moving iron core 22 is based on the installation side plate 30, and the value of the third gap X3 is significantly reduced. During the entire closing process, the magnitude of the electromagnetic attraction is always greater than the magnitude of the load, which can greatly improve the attraction effect of the fixed iron core 21 and the moving iron core 22 and improve the closing reliability of the switch. Figure 3 The first air gap X1 and the second air gap X2 are shown in FIG. Figure 1 The above are similar and have been explained in the background technology column, so they will not be repeated here.

[0038] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A switch, comprising a housing (10), wherein a first accommodating space (101) is formed in the housing (10); a contact system (1), wherein the contact system (1) comprises a stationary contact assembly (11) and a moving contact assembly (12), wherein the stationary contact assembly (11) is fixedly arranged in the first accommodating space (101), and the moving contact assembly (12) is rotatably arranged in the first accommodating space (101); an electromagnetic operating mechanism (2), wherein the electromagnetic operating mechanism (2) comprises a fixed iron core (21) and a moving iron core (22); a pair of mounting side plates (30), wherein the pair of mounting side plates (30) are fixedly arranged on the housing (10) face to face with each other; and a main shaft (4), wherein the main shaft (4) is rotatably arranged on the mounting side plate (30) and is provided with a transmission component for connecting with the moving contact assembly (12); characterized in that: The fixed iron core (21) is fixedly arranged on the pair of mounting side plates (30), and the moving iron core (22) is fixedly arranged on the main shaft (4). The fixed iron core (21) and the moving iron core (22) are attracted to each other by the excitation of the electromagnetic coil (211) arranged in the fixed iron core (21), and the moving iron core (22) drives the main shaft (4) to rotate during the rotation process, and the transmission component drives the moving contact assembly (12) to contact the static contact assembly (11) to achieve closing.

2. A switch according to claim 1, characterized in that: The housing (10) further comprises a second accommodating space (102) separated from the first accommodating space (101), and the fixed iron core (21) is arranged in the second accommodating space (102).

3. A switch according to claim 2, characterized in that: A mounting side plate wing (301) is extended from each side of the pair of mounting side plates (30) toward the second accommodating space (102), and the mounting side plate wing (301) extends into the second accommodating space (102). The fixed iron core (21) is fixed to the opposite side of the pair of mounting side plate wing (301).

4. A switch according to claim 3, characterized in that: A fixed iron core fixing hole (3011) is provided at the upper and lower parts of the pair of mounting side plate wing plates (301) and at corresponding positions, and a fixed iron core hole (212) is provided at the upper and lower parts of the fixed iron core (21). The fixed iron core (21) is fixed to the pair of mounting side plate wing plates (301) by fasteners at positions corresponding to the fixed iron core fixing holes (3011) and the fixed iron core holes (212).

5. A switch according to claim 1, characterized in that: The transmission component comprises a first operating arm (5) and a first connecting rod (6), one end of the first operating arm (5) is fixedly arranged on the main shaft (4), the first operating arm (5) is hingedly arranged with one end of the first connecting rod (6) away from the main shaft (4), and the other end of the first connecting rod (6) is hingedly arranged with the moving contact assembly (12).

6. A switch according to claim 3, characterized in that: A second operating arm (7) is fixedly arranged on the main shaft (4), the second operating arm (7) is a pair, and the moving iron core (22) is fixedly arranged on the second operating arm (7).

7. A switch according to claim 3, characterized in that: The mounting side plate (30) is provided with a notch portion (302) for accommodating the main shaft (4), and the notch portion (302) is adapted to the shape of the main shaft (4).

8. A switch according to claim 3, characterized in that: A mounting side plate fixing portion (303) for fixing the mounting side plate (30) to the housing (10) is formed by bending on the mounting side plate (30) and located at the upper and lower sides of the mounting side plate wing plate (301).

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