Switch
By setting the static iron core in the second accommodation chamber in the switch case, the existing switch size is solved and the problems of deformation of the dynamic iron core are improved, and the switch size is reduced and the reliability of closing is improved.
Patent Information
- Application Number
- CN202421292910.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-06
AI Technical Summary
When the existing switch is installed outside the housing, the switch volume is large and the cantilever setting of the static iron core causes the dynamic iron core to deform, affecting the reliability of the closing.
The static iron core is arranged in the second receiving cavity in the housing. By adjusting the configuration of the receiving cavity and the shape of the static iron core, the installation position of the static iron core is ensured to be reasonable, avoid cantilever setting, and ensure normal movement of the moving iron core.
The switch volume is miniaturized, the dynamic core is deformed, and the closing reliability of the dynamic and static contact components is ensured.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrical switches, and in particular relates to a switch. Background Art
[0002] The switch is an electrical protection component in the low-voltage power distribution network. It plays the role of preventing fault current from damaging the load and ensuring the safety of electrical facilities. Specifically, when a large fault current caused by overload, short circuit or the like occurs in the circuit, it can cut off the large fault current.
[0003] Figure 1 Schematic diagram of a switch in the prior art, comprising a housing 1 made of an insulating material such as plastic molding; a stationary contact assembly 21 of a structural system of a contact system 2 arranged in the housing 1 and a movable contact assembly 22 that rotates relative to the stationary contact assembly 21 and contacts or separates from the stationary contact assembly 21; a movable contact assembly 22 that is rotatably arranged outside the housing 1 ( Figure 1 a main shaft 4 (on the left side of the position state shown); a first operating arm 5 fixedly arranged in the middle on the main shaft 4; a second operating arm 6, a moving iron core connecting rod 7 and an electromagnetic mechanism 3, one end of the second operating arm 6 is hinged to one end of the first operating arm 5, and the other end of the first operating arm 5 is hinged to one end of the moving iron core connecting rod 7, and the other end of the moving iron core connecting rod 7 is hinged to the moving contact assembly 22, the electromagnetic mechanism 3 includes a static iron core 31 arranged on the outside of the shell 1 and a moving iron core 32 pivotally arranged and in contact with or separated from the static iron core 31 (also called "attracting or repelling"), the other end of the second operating arm 6 is hinged to the moving iron core 32. The coil (not shown in the figure) of the static iron core 31 of the electromagnetic mechanism 3 is energized to attract the moving iron core 32 to the static iron core 31, and the moving iron core 32 causes the second operating arm 6 to drive the main shaft 4 to rotate through the first operating arm 5, and drives the moving iron core connecting rod 7 through the first operating arm 5, so that the moving iron core connecting rod 7 drives the moving contact assembly 22 to contact the static contact assembly 21 to close the circuit, otherwise it will open the circuit.
[0004] Since the static iron core 31 of the electromagnetic mechanism 3 of the above-mentioned structure is installed on the outside of the shell 1, there are the following shortcomings: first, the length space of the switch in the horizontal direction is increased (that is, the X-direction or axial space of the switch is increased), which is not conducive to the miniaturization of the switch volume; second, since the static iron core 31 is installed outside the shell in the form of a cantilever beam effect, it will produce deflection after being subjected to force, affecting the positioning accuracy of the electromagnetic operating unit, especially after the coil of the static iron core 31 is energized, the vertical upward electromagnetic suction force generated on the air gap surface of the static iron core 31 is very large, causing the moving iron core 32 to tend to deform upward, thereby hindering the moving iron core 32 from moving into place, causing the contact system 2 to fail to close in place. Utility Model Content
[0005] The task of the utility model is to provide a switch which helps to reasonably change the installation position of the static iron core so as to meet the requirements of miniaturization of the switch volume, and is conducive to abandoning the cantilever setting mode of the static iron core so as to avoid factors causing deformation of the moving iron core and ensure that the moving iron core moves into place to reflect the closing reliability of the moving and static contact assemblies.
[0006] The task of the utility model is accomplished in this way. A switch includes a shell, a contact system and an electromagnetic mechanism. The shell has a first accommodating chamber and a second accommodating chamber arranged in parallel. The contact system includes a static contact assembly and a moving contact assembly. The static contact assembly is fixed in the first accommodating chamber, and the moving contact assembly is rotatably arranged in the first accommodating chamber. The electromagnetic mechanism includes a static iron core and a moving iron core. The static iron core is arranged in the second accommodating chamber. After the coil of the static iron core is energized, the moving iron core is attracted to it and the action of the moving iron core drives the moving contact assembly and the static contact assembly to close.
[0007] In the present invention, the number of the first accommodating chambers is two, the number of the second accommodating chamber is one, and the two first accommodating chambers are respectively arranged on both sides of the second accommodating chamber.
[0008] In the utility model, the number of the first accommodating cavities is configured as three, and the number of the second accommodating cavities is configured as one, then one first accommodating cavity and two first accommodating cavities are respectively provided on both sides of the second accommodating cavity.
[0009] In the utility model, the second accommodating cavity is provided with an operating window which matches the shape and size of the static iron core on the side of the corresponding shell facing the dynamic iron core, and the dynamic iron core is attracted to the static iron core through the operating window.
[0010] In the utility model, the switch also includes a main shaft, a first operating arm and a second operating arm. Both ends of the main shaft are rotatably supported on the outside of the shell. One end of the first operating arm facing the main shaft is sleeved on the main shaft, and one end of the first operating arm away from the main shaft is hinged to the moving iron core. The second operating arm is located on one side of the first operating arm. One end of the second operating arm facing the main shaft is also sleeved on the main shaft, and one end away from the main shaft is hinged to the moving contact assembly through a moving iron core connecting rod.
[0011] In the present invention, one end of the first operating arm away from the main shaft is hinged to the moving iron core through an operating arm hinge pin arranged on the moving iron core.
[0012] In the utility model, the static iron core is composed of a plurality of U-shaped magnetic iron plates and / or E-shaped magnetic iron plates stacked together, and the moving iron core is composed of a plurality of rectangular magnetic iron plates stacked together.
[0013] In the utility model, the E-shaped magnetic iron plate has one more middle protrusion than the U-shaped magnetic iron plate, and the middle protrusion is located in the frame of the coil of the static iron core.
[0014] In the utility model, one end of the first operating arm facing the main shaft is sleeved on the main shaft, and one end of the first operating arm away from the main shaft is respectively hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the moving contact assembly.
[0015] In the utility model, the moving iron core is fixedly arranged in the middle of a connecting shaft, and both ends of the connecting shaft are respectively hinged to one end of the moving iron core connecting rod, and the other end of the moving iron core connecting rod is connected to the moving contact assembly.
[0016] The technical effect of the technical solution provided by the utility model is that: since the static iron core of the electromagnetic mechanism is arranged in the second accommodating cavity of the shell which is just the idle redundant space for the static iron core to be arranged, the requirement of miniaturization of the switch volume can be met and the deformation of the moving iron core caused by the cantilever setting of the static iron core can be avoided, thereby ensuring that the moving iron core moves into place and reflecting the closing reliability of the moving and static contact assemblies. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of a switch in the prior art;
[0018] Figure 2 This is a schematic diagram of Embodiment 1 of the present utility model;
[0019] Figure 3 for Figure 2 Schematic diagram of the closed state of the switch shown;
[0020] Figure 4 for Figure 2 Schematic diagram of the switch in the open state shown;
[0021] Figure 5 for Figures 2 to 4 The structure diagram of the static iron core shown in the embodiment;
[0022] Figure 6 It is a schematic diagram of embodiment 2 of the utility model;
[0023] Figure 7 This is a schematic diagram of Example 3 of the utility model.
[0024] Figure 8 for Figure 2 AA side profile of . DETAILED DESCRIPTION Example 1
[0025] See also Figure 2 and Figure 8 , shows a shell 1, a contact system 2 and an electromagnetic mechanism 3, the shell 1 has a first accommodating cavity 11 and a second accommodating cavity 12 arranged in parallel, the contact system 2 includes a static contact assembly 21 and a moving contact assembly 22, the static contact assembly 21 is fixed in the aforementioned first accommodating cavity 11, the moving contact assembly 22 is rotatably arranged in the first accommodating cavity 11, and the electromagnetic mechanism 3 includes a static iron core 31 and a moving iron core 32.
[0026] Compared with the existing technology, for example Figure 1 As shown in the structure, the technical key points of the technical solution provided by the utility model are: the aforementioned static iron core 31 is arranged in the aforementioned second accommodating cavity 12, and after the coil of the static iron core 31 is energized, the moving iron core 32 is attracted to it and the action of the moving iron core 32 drives the moving contact assembly 22 and the static contact assembly 21 to close.
[0027] In this embodiment, if the switch is a 2-pole switch, the number of the first accommodating chambers 11 is configured as two, the number of the second accommodating chambers 12 is configured as one, and the two first accommodating chambers 11 are respectively arranged on both sides of the first accommodating chamber 12 and separated by a partition. Of course, according to actual needs, if the switch is a single-pole switch, the number of the first accommodating chamber 11 is configured as one, and the number of the second accommodating chamber 12 is one, then the first accommodating chamber 11 and the second accommodating chamber 12 are arranged side by side on the left and right, and the two are separated by a partition. If the switch is a 3-pole (three-pole) switch, the number of the first accommodating chambers 11 is configured as three, and the number of the second accommodating chamber 12 is configured as one, then one first accommodating chamber 11 and two first accommodating chambers are respectively arranged on both sides of the second accommodating chamber 12.
[0028] The second accommodating cavity 12 is provided with an operating window 121 (which is adapted to the shape and size of the static iron core 31) on the side of the corresponding housing 1 facing the moving iron core 32. Figure 3 As shown in the figure), the moving iron core 32 is attracted to the stationary iron core 31 through the operating window 121.
[0029] The aforementioned housing 1 is made of plastic and through a mold, and is composed of two corresponding shell petals spliced together to form a closed space.
[0030] See you next time Figure 2 And combined with Figure 3 and Figure 4The aforementioned switch also includes a main shaft 4, a first operating arm 5 and a second operating arm 6. Both ends of the main shaft 4 are rotatably supported on the outer side of the aforementioned housing 1. The end of the first operating arm 5 facing the main shaft 4 is sleeved on the main shaft 4, and the end of the first operating arm 5 away from the main shaft 4 is hinged to the aforementioned moving iron core 32. The second operating arm 6 is located on one side of the first operating arm 5. The end of the second operating arm 6 facing the main shaft 4 is also sleeved on the main shaft 4, and the end away from the main shaft 4 is hinged to the aforementioned moving contact assembly 22 through the moving iron core connecting rod 7. In this embodiment, the first operating arm 5 and the second operating arm 6 are both a pair. The first operating arms 5 are arranged in parallel with each other. The second operating arm 6 is also arranged in parallel with each other and is located on both sides of the pair of first operating arms 5. The end of the moving iron core 32 facing the main shaft 4 is limited between the aforementioned pair of first operating arms 5 through the moving iron core limiting shaft pin 321.
[0031] One end of the pair of first operating arms 5 away from the main shaft 4 is hinged to both sides of the moving iron core 32 through an operating arm hinge pin 322 arranged on the moving iron core 32 .
[0032] See also Figure 5 The aforementioned static iron core 31 is composed of a plurality of U-shaped magnetic iron plates 311 and / or E-shaped magnetic iron plates 312 stacked together, and the aforementioned moving iron core 32 is composed of a plurality of rectangular magnetic iron plates stacked together.
[0033] Depend on Figure 5 As shown, the middle of the static iron core 31 is an E-shaped magnetic iron plate 312, and the two sides are U-shaped magnetic iron plates 311. The aforementioned E-shaped magnetic iron plate 312 has an additional middle protrusion 313 compared to the aforementioned U-shaped magnetic iron plate 311, and the middle protrusion 313 is located in the skeleton of the coil of the static iron core 31.
[0034] The switch is usually designed with 2 to 4 poles (i.e., "two poles to four poles"). In this embodiment, it is a two-pole switch with a two-pole contact system. The static iron core 31 is arranged between the two-pole contacts ( Figure 3 In this embodiment, there are two contact systems 2, which are respectively located on both sides of the static iron core 31.
[0035] See also Figure 3 ,at present Figure 3The state shown is that the moving iron core 32 is in a state of being attracted to the static iron core 31 and closing the circuit breaker. The specific closing process is: after the coil of the static iron core 31 is energized, the static iron core 31 generates an electromagnetic attraction on the moving iron core 32, and the moving iron core 32 overcomes the counter torque of the opening spring (not shown in the figure) through a pair of second operating arms 6, driving the main shaft 4 to rotate counterclockwise, and a pair of first operating arms 5 fixedly installed on the main shaft 4 rotate the moving contact assembly 22 toward the static contact assembly 21 through the moving iron core connecting rod 7, and stores energy for the opening spring (not shown in the figure). When the moving contact assembly 22 contacts the static contact assembly 21, the crimping spring arranged inside the moving contact assembly begins to further store energy until the static iron core 31 and the moving iron core 32 contact, and the moving iron core 32 reaches the closing setting position, that is, it is in a state of being closed. Figure 3 Status shown.
[0036] See also Figure 4 ,at present Figure 4 The state shown is that the moving iron core 32 is separated from the static iron core 31, that is, in the open state. The specific opening process is: after the opening signal is issued, under the drive of the opening spring and the crimping spring, the main shaft 4 rotates clockwise, driving the contact assembly 2 to separate from the static contact assembly 1, realizing the opening, and at the same time the moving iron core 32 is reset to the maximum open position. Example 2
[0037] See also Figure 6 The aforementioned pair of first operating arms 5 are parallel to each other and one end facing the main shaft 4 is sleeved on the main shaft 4, while one end of the pair of first operating arms 5 away from the main shaft 4 is respectively hinged to one end of the connecting rod 8, and the other end of the connecting rod 8 is hinged to the aforementioned moving contact assembly 22. The rest is the same as the description of embodiment 1. Example 3
[0038] See also Figure 7 The electromagnetic mechanism 3 adopts a solenoid type electromagnet. Since the specific structure and working mechanism of the solenoid type electromagnet are well known, the applicant will not repeat them. The aforementioned moving iron core 32 is fixedly arranged in the middle of a connecting shaft 9, and the two ends of the connecting shaft 9 are respectively hinged to one end of the aforementioned moving iron core connecting rod 7, and the other end of the moving iron core connecting rod 7 is connected to the aforementioned moving contact assembly 22. The rest is the same as the description of embodiment 1.
[0039] 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 (1), a contact system (2) and an electromagnetic mechanism (3), wherein the housing (1) has a first accommodating chamber (11) and a second accommodating chamber (12) arranged in parallel, the contact system (2) comprises a stationary contact assembly (21) and a moving contact assembly (22), the stationary contact assembly (21) is fixed in the first accommodating chamber (11), the moving contact assembly (22) is rotatably arranged in the first accommodating chamber (11), and the electromagnetic mechanism (3) comprises a stationary iron core (31) and a moving iron core (32), characterized in that: The static iron core (31) is arranged in the second accommodating cavity (12); after the coil of the static iron core (31) is energized, the moving iron core (32) is attracted to it and the movement of the moving iron core (32) drives the moving contact assembly (22) and the static contact assembly (21) to close.
2. A switch according to claim 1, characterized in that: The number of the first accommodating chambers (11) is two, the number of the second accommodating chamber (12) is one, and the two first accommodating chambers (11) are respectively arranged on both sides of the second accommodating chamber (12).
3. A switch according to claim 1, characterized in that: The number of the first accommodating chambers (11) is three, and the number of the second accommodating chambers (12) is one, and one first accommodating chamber (11) and two first accommodating chambers are respectively arranged on both sides of the second accommodating chamber (12).
4. A switch according to claim 1, 2 or 3, characterized in that: The second accommodating cavity (12) is provided with an operating window (121) having a shape and size matching that of the static iron core (31) on the side of the corresponding housing (1) facing the dynamic iron core (32); the dynamic iron core (32) is attracted to the static iron core (31) through the operating window (121).
5. A switch according to claim 1, characterized in that: The switch further comprises a main shaft (4), a first operating arm (5) and a second operating arm (6); both ends of the main shaft (4) are rotatably supported on the outer side of the housing (1); one end of the first operating arm (5) facing the main shaft (4) is sleeved on the main shaft (4), and one end of the first operating arm (5) away from the main shaft (4) is hinged to the moving iron core (32); the second operating arm (6) is located on one side of the first operating arm (5); one end of the second operating arm (6) facing the main shaft (4) is also sleeved on the main shaft (4), and one end away from the main shaft (4) is hinged to the moving contact assembly (22) via a moving iron core connecting rod (7).
6. A switch according to claim 5, characterized in that: One end of the first operating arm (5) away from the main shaft (4) is hinged to the moving iron core (32) via an operating arm hinge pin (322) arranged on the moving iron core (32).
7. A switch according to claim 1, characterized in that: The static iron core (31) is composed of a plurality of U-shaped magnetic iron plates (311) and / or E-shaped magnetic iron plates (312) stacked together, and the moving iron core (32) is composed of a plurality of rectangular magnetic iron plates stacked together.
8. A switch according to claim 7, characterized in that: The E-shaped magnetic iron plate (312) has an additional middle protrusion (313) compared to the U-shaped magnetic iron plate (311), and the middle protrusion (313) is located in the frame of the coil of the static iron core (31).
9. A switch according to claim 5, characterized in that: One end of the first operating arm (5) facing the main shaft (4) is sleeved on the main shaft (4), and one end of the first operating arm (5) away from the main shaft (4) is hinged to one end of the connecting rod (8), and the other end of the connecting rod (8) is hinged to the moving contact assembly (22).
10. A switch according to claim 5, characterized in that: The moving iron core (32) is fixedly arranged in the middle of a connecting shaft (9), and the two ends of the connecting shaft (9) are respectively hinged to one end of the moving iron core connecting rod (7), and the other end of the moving iron core connecting rod (7) is connected to the moving contact assembly (22).