Universal change-over switch

Abstract

The utility model relates to a universal change-over switch, which comprises a mounting plate, a change-over mechanism, a contact system, a surface cover and a handle, and is characterized in that the change-over mechanism comprises a shell, a change-over shaft, a gear turntable, two groups of gear reset assemblies, a driving gear, a driving shaft and a transmission gear which is arranged on the driving shaft and is meshed with the driving gear; the gear reset assembly comprises a reset piece movably arranged in the shell, a positioning roller rotationally arranged on the reset piece and a reset spring arranged in the reset piece and the shell, and a plurality of gear grooves matched with the positioning roller are formed in the gear rotary disc. And the positioning roller acts along with the gear turntable and is switched among the plurality of gear grooves in a reciprocating manner. The device has the advantages of being simple in structure, stable and reliable in performance, good in protection performance and low in failure rate.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a universal changeover switch. Background Technology

[0002] A universal changeover switch is a multi-position, multi-stage, multi-circuit control electrical appliance that can convert household appliances with different currents to operate normally under their applicable voltage and current. It is mainly used in AC 50Hz electrical circuits with a rated operating voltage of 380V and below, and DC voltage of 220V and below. It is suitable for switching various control circuits, voltmeter and ammeter phase-changing measurement control, power distribution circuit switching, and remote control. Currently, the universal changeover switch sets used in special equipment such as railway locomotives are slightly modified from civilian electrical appliances. Their contacts are exposed, resulting in poor protection performance and a high failure rate, failing to meet the high-density, high-capacity, and high-vibration requirements of special environments such as railways and mines. Especially in windy and sandy areas such as Northwest and North China, or in metallurgical and mining enterprises with heavy dust and oil pollution, the adhesion of sand and oil can cause the switching mechanism of the universal changeover switch set to jam, or dust accumulation on the contacts can prevent reliable contact engagement. Summary of the Invention

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a universal changeover switch with simple structure, stable and reliable performance, good protection performance and low failure rate.

[0004] To achieve the above objectives, this utility model employs a universal changeover switch, comprising a mounting plate, a changeover mechanism mounted on the mounting plate, a contact system mounted on the changeover mechanism, a cover mounted on the mounting plate, and a handle mounted on the cover for driving the changeover mechanism to perform a changeover action. The changeover mechanism includes a housing, a changeover shaft rotatably mounted within the housing, a gear shift dial linked to the changeover shaft, two sets of gear reset assemblies mounted within the housing and cooperating with the gear shift dial, a drive gear linked to the changeover shaft, a drive shaft for driving the contact system to perform opening and closing actions, and a transmission gear mounted on the drive shaft and meshing with the drive gear. The gear reset assembly includes a reset component movably mounted within the housing, a positioning roller rotatably mounted on the reset component, and a reset spring mounted within the reset component and housing. The gear shift dial is provided with multiple gear slots that cooperate with the positioning rollers, and the positioning rollers move with the gear shift dial and reciprocate between the multiple gear slots.

[0005] The advantages of the above structure are: the modular design of the switching mechanism allows for modular assembly of the switch, provides better protection during switching, prevents sand and oil from entering the switching mechanism, and increases operational reliability. The gear reset component ensures that the switching shaft can reliably perform gear switching actions, further enhancing operational reliability. The gear dial and the positioning rollers of the reset component work together to ensure more flexible gear switching. Therefore, this universal switch has the advantages of simple structure, stable and reliable performance, good protection, and low failure rate.

[0006] Specifically, the contact system includes a housing mounted on the outer casing and multiple sets of contact assemblies disposed within the housing. Each contact assembly includes a cam that engages with a drive shaft, a contact frame disposed within the housing, a return spring disposed between the contact frame and the housing, a moving contact mounted on the contact frame, and a stationary contact disposed within the housing and engaging with the moving contact. One end of the contact frame is provided with a roller that engages with the cam. The cam has an arc-shaped positioning groove that engages with the roller, and the arc-shaped positioning groove moves with the cam and engages with the roller. The contact assemblies are disposed within the housing, thus preventing exposed contacts and improving protection. Furthermore, the cam drives the contact frame via the roller, ensuring reliable connection or disconnection between the moving and stationary contacts, thereby improving the operational reliability of the universal changeover switch.

[0007] Specifically, one end of the reset component has a positioning protrusion that mates with the outer shell. The outer shell has a positioning groove that mates with the positioning protrusion. The positioning protrusion engages within the positioning groove, forming a snap-fit ​​connection between the reset component and the outer shell. The other end of the reset component has a positioning boss. One end of the reset spring engages with the positioning boss, and the other end engages with a limiting groove in the outer shell. The reset component and the outer shell are assembled using a snap-fit ​​method, which facilitates assembly and improves assembly efficiency.

[0008] Specifically, one end of the conversion shaft has a snap-fit ​​portion extending outside the cover, and the handle is provided with a snap-fit ​​groove that mates with the snap-fit ​​portion. The snap-fit ​​portion engages within the snap-fit ​​groove, thus forming a linkage between the conversion shaft and the handle. The handle and conversion shaft are assembled using a snap-fit ​​method, which facilitates the assembly of the handle and the conversion shaft and improves assembly efficiency.

[0009] Specifically, a guide turntable is linked to the switching shaft, and a guide protrusion is provided on the guide turntable. A guide groove that mates with the guide protrusion is provided inside the housing. The guide protrusion moves with the guide turntable and reciprocates within the guide groove. The guide turntable guides the switching shaft, ensuring reliable switching operations and improving the overall reliability of the universal switch. Attached Figure Description

[0010] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0011] Figure 2 This is an exploded view of an embodiment of the present utility model.

[0012] Figure 3 This is a cross-sectional view of an embodiment of the present utility model. Detailed Implementation

[0013] like Figures 1 to 3 As shown, this utility model embodiment is a universal changeover switch, including a mounting plate 10, a changeover mechanism 20 disposed on the mounting plate 10, a contact system 30 disposed on the changeover mechanism 10, a faceplate 11 disposed on the mounting plate 10, and a handle 12 disposed on the faceplate 11 for driving the changeover mechanism 20 to perform a changeover action. The changeover mechanism 20 includes a housing 21, a changeover shaft 22 rotatably disposed within the housing 21, a gear shift dial 23 linked to the changeover shaft 22, two sets of gear reset components 24 disposed within the housing 21 and cooperating with the gear shift dial 23, and a drive mechanism 24 linked to the changeover shaft 22. The device includes a drive gear 25, a drive shaft 26 for driving the contact system 30 to perform opening and closing actions, and a transmission gear 27 mounted on the drive shaft 26 and meshing with the drive gear 25. The gear reset assembly 24 includes a reset member 241 movably mounted in the housing 21, a positioning roller 242 rotatably mounted on the reset member 241, and a reset spring 243 mounted in the reset member 241 and the housing 21. The gear turntable 23 is provided with multiple gear slots 231 that cooperate with the positioning roller 242. The positioning roller 242 moves with the gear turntable 23 and reciprocates between the multiple gear slots 231.

[0014] like Figure 2 and 3As shown, the contact system 30 includes a housing 31 disposed on the outer casing 21 and multiple sets of contact assemblies 32 disposed within the housing 31. Each contact assembly 32 includes a cam 33 that is linked to the drive shaft 26, a contact frame 34 disposed within the housing 31, a return spring 35 disposed between the contact frame 34 and the housing 31, a moving contact 36 that is linked to the contact frame 34, and a stationary contact 37 disposed within the housing 31 and cooperating with the moving contact 36. One end of the contact frame 34 is provided with a roller 341 that cooperates with the cam 33. The cam 33 is provided with an arc-shaped positioning groove 331 that cooperates with the roller 341. The arc-shaped positioning groove 331 moves with the cam 33 and engages with the roller 341. The contact assembly is housed within the housing, thus preventing exposed contacts and improving protection. The cam drives the contact holder via rollers, ensuring reliable connection and disconnection between the moving and stationary contacts, enhancing the overall reliability of the universal changeover switch. The reset component 241 has a positioning protrusion 2411 at one end that mates with the housing 21. The housing 21 contains a positioning groove 211 that mates with the positioning protrusion 2411. The positioning protrusion 2411 engages within the positioning groove 211, forming a snap-fit ​​connection between the reset component 241 and the housing 21. The other end of the reset component 241 has a positioning boss 2412. One end of the reset spring 243 engages with the positioning boss 2412, and the other end engages with the limiting groove 212 in the housing 21. The snap-fit ​​assembly of the reset component and the housing facilitates assembly and improves efficiency. The conversion shaft 22 has a snap-fit ​​portion 221 extending outside the cover 11 at one end. The handle 12 is provided with a snap-fit ​​groove 121 that mates with the snap-fit ​​portion 221. The snap-fit ​​portion 221 engages within the snap-fit ​​groove 121, forming a linkage between the conversion shaft 22 and the handle 12. The snap-fit ​​assembly of the handle and the conversion shaft facilitates assembly and improves assembly efficiency. A guide turntable 28 is linked to the conversion shaft 22. The guide turntable 28 is provided with a guide protrusion 281. The housing 21 has a guide groove 213 that mates with the guide protrusion 281. The guide protrusion 281 moves with the guide turntable 28 and reciprocates within the guide groove 213. The guide turntable guides the conversion shaft, ensuring reliable conversion action and improving the reliability of the universal changeover switch.

[0015] The switching mechanism adopts a modular design, enabling modular assembly of the switch and providing better protection over longer periods. It prevents sand, dust, and oil from entering the switching mechanism, resulting in higher operational reliability. The gear reset component ensures the switching shaft can reliably perform gear switching actions, further enhancing reliability. The gear dial and the positioning rollers of the reset component work together to ensure more flexible gear switching. Therefore, this universal switch has the advantages of simple structure, stable and reliable performance, good protection, and low failure rate.

Claims

1. A universal changeover switch, comprising a mounting plate, a changing mechanism disposed on the mounting plate, a contact system disposed on the changing mechanism, a cover disposed on the mounting plate, and a handle disposed on the cover for driving the changing mechanism to perform a changing action, characterized in that: The switching mechanism includes a housing, a switching shaft rotatably disposed within the housing, a gear shift turntable linked to the switching shaft, two sets of gear reset assemblies disposed within the housing and cooperating with the gear shift turntable, a drive gear linked to the switching shaft, a drive shaft for driving the contact system to perform opening and closing actions, and a transmission gear disposed on the drive shaft and meshing with the drive gear. The gear reset assembly includes a reset component movably disposed within the housing, a positioning roller rotatably disposed on the reset component, and a reset spring disposed within the reset component and the housing. The gear shift turntable is provided with multiple gear slots that cooperate with the positioning rollers. The positioning rollers move with the gear shift turntable and reciprocate between the multiple gear slots.

2. The universal changeover switch according to claim 1, characterized in that: The contact system includes a housing mounted on an outer shell and multiple sets of contact assemblies respectively disposed within the housing. Each contact assembly includes a cam that is linked to a drive shaft, a contact frame disposed within the housing, a return spring disposed between the contact frame and the housing, a moving contact that is linked to the contact frame, and a stationary contact disposed within the housing and cooperating with the moving contact. One end of the contact frame is provided with a roller that cooperates with the cam, and the cam is provided with an arc-shaped positioning groove that cooperates with the roller. The arc-shaped positioning groove moves with the cam and engages with the roller.

3. The universal changeover switch according to claim 1 or 2, characterized in that: The reset component has a positioning protrusion at one end that mates with the outer shell. The outer shell has a positioning groove that mates with the positioning protrusion. The positioning protrusion engages in the positioning groove, forming a snap-fit ​​engagement between the reset component and the outer shell. The reset component has a positioning boss at the other end. One end of the reset spring engages in the positioning boss, and the other end engages in the limiting groove of the outer shell.

4. The universal changeover switch according to claim 1 or 2, characterized in that: The conversion shaft has a snap-fit ​​portion extending outside the cover at one end, and the handle is provided with a snap-fit ​​groove that mates with the snap-fit ​​portion. The snap-fit ​​portion engages in the snap-fit ​​groove, thus forming a linkage between the conversion shaft and the handle.

5. The universal changeover switch according to claim 1 or 2, characterized in that: A guide turntable is linked to the conversion shaft, and a guide protrusion is provided on the guide turntable. A guide groove that cooperates with the guide protrusion is provided inside the outer shell. The guide protrusion moves with the guide turntable and reciprocates within the guide groove.

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