Automatic transfer mechanism of dual power automatic transfer switch

Abstract

The application relates to an automatic conversion mechanism of a dual-power automatic transfer switch, which comprises a base, a cover, a motor and an energy storage conversion assembly. A containing cavity for placing the energy storage conversion assembly is formed between the cover and the base. The energy storage conversion assembly comprises a rotating disc, a driving wheel and an energy storage torsional spring. Two elastic energy storage arms are symmetrically arranged on the driving wheel. The rotating disc is provided with a normal energy storage release surface and a standby energy storage release surface matched with the two elastic energy storage arms. The normal energy storage release surface and the standby energy storage release surface can be respectively abutted on the two elastic energy storage arms and can realize normal power closing energy storage release or standby power closing energy storage release. The application has the advantages of simple structure, stable and reliable performance, low cost, small size and rapid conversion.

Description

Technical Field

[0001] This invention specifically relates to a dual-power automatic transfer switch, and more specifically to an automatic transfer mechanism for the dual-power automatic transfer switch. Background Technology

[0002] Currently, many industries and departments have extremely high requirements for power supply reliability. To ensure power continuity, dual-power automatic transfer switches are used in many important situations to supply power to electrical appliances. As an essential device for power switching, the technical performance requirements for dual-power automatic transfer switches are also becoming increasingly stringent. Dual-power automatic transfer switches are mainly divided into PC-class dual-power automatic transfer switches and CB-class dual-power automatic transfer switches. PC-class dual-power automatic transfer switches use a high-voltage switch as the actuator, capable of connecting and carrying but not interrupting short-circuit current, and can still maintain power supply continuity when the load is overloaded. CB-class dual-power automatic transfer switches use a circuit breaker as the actuator, equipped with an overcurrent trip unit, and have overload protection functions for load-side electrical equipment and cables. It can connect, carry, and interrupt short-circuit current, and will disconnect the load when an overload or short circuit occurs. However, the existing PC-level dual-power automatic transfer switch has an unreasonable structural design. The automatic transfer mechanism has a slow switching speed and cannot achieve fast opening or closing of the dual-power automatic transfer switch, resulting in a short product lifespan and low breaking capacity. In addition, the automatic transfer mechanism has a complex structural design, large size, many parts, and is relatively cumbersome to assemble, resulting in high production costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic switching mechanism for a dual-power automatic transfer switch that is simple in structure, stable and reliable in performance, low in cost, small in size, and fast in switching.

[0004] To achieve the above objectives, the present invention employs an automatic switching mechanism for a dual-power automatic transfer switch, comprising a base, a cover mounted on the base, a motor mounted within the base, and an energy storage conversion component. A cavity for housing the energy storage conversion component is formed between the cover and the base. The energy storage conversion component includes a turntable rotatably mounted on the base and linked to the motor shaft, a drive wheel rotatably mounted within the turntable and used to drive the contact system to perform opening and closing operations, and an energy storage torsion spring disposed between the turntable and the drive wheel. Two elastic energy storage arms are symmetrically arranged on the drive wheel. A commonly used energy storage release surface and a spare energy storage release surface, respectively, are provided within the turntable, cooperating with the two elastic energy storage arms. The commonly used energy storage release surface and the spare energy storage release surface move with the turntable and can respectively abut against the two elastic energy storage arms, enabling energy storage release upon closing the commonly used power supply or upon closing the spare power supply.

[0005] The beneficial effects of this invention are as follows: The automatic transfer mechanism adopts an energy storage structure design, and the energy storage conversion component enables rapid switching of the automatic transfer mechanism with a shorter switching time. This achieves the purpose of rapid opening and closing of the dual-power automatic transfer switch, resulting in stronger breaking capacity. During operation, the motor drives the turntable to rotate, compressing the energy storage torsion spring to store energy. When the commonly used energy storage release surface and the standby energy storage release surface on the turntable contact the two elastic energy storage arms (passing the dead point), the energy storage torsion spring releases energy. This allows for rapid release of energy stored when the commonly used power supply is closed or when the standby power supply is closed, achieving the purpose of rapid switching of the automatic transfer mechanism and effectively improving the breaking capacity of the dual-power automatic transfer switch. Therefore, this automatic transfer mechanism has the advantages of simple structure, stable and reliable performance, low cost, small size, and rapid switching.

[0006] Specifically, an arc-shaped guide groove is provided on the turntable between the commonly used energy storage release surface and the standby energy storage release surface. A guide ramp is provided between the arc-shaped guide groove and both the commonly used and standby energy storage release surfaces. Each of the two elastic energy storage arms has an energy storage column extending within the arc-shaped guide groove. The energy storage columns of the two elastic energy storage arms can slide sequentially along the arc-shaped guide groove and the guide ramp to the commonly used or standby energy storage release surface. The arc-shaped guide groove and the guide ramp guide the energy storage columns of the elastic energy storage arms, ensuring that the elastic energy storage arms can stably and reliably store energy. When the elastic energy storage arms slide to the commonly used or standby energy storage release surface (i.e., past the dead point), rapid energy release upon closing the commonly used power supply or the standby power supply can be achieved, which helps to accelerate the switching speed of the automatic switching mechanism.

[0007] Specifically, the drive wheel is provided with matching energy storage locking slots at the energy storage columns corresponding to the two elastic energy storage arms. The energy storage columns move with the elastic energy storage arms and are engaged in the energy storage locking slots. The energy storage locking slots on the drive wheel that engage with the energy storage columns ensure reliable energy storage by the elastic energy storage arms and rapid energy release, enabling rapid switching of the automatic conversion mechanism and achieving the purpose of quick separation and engagement.

[0008] Specifically, the outer peripheral wall of the turntable is provided with a handle insertion hole, and the cover body is provided with a through hole corresponding to the handle insertion hole. The cover body is provided with a cover plate that fits into the through hole. The handle insertion hole on the turntable allows the user to drive the turntable by operating the handle, thereby realizing the manual operation of the automatic conversion mechanism. The cover plate also provides protection, preventing dust and debris from falling into the energy storage conversion component, thus improving the operational reliability of the automatic conversion mechanism.

[0009] Specifically, each end of the cover plate is provided with a clip, and the through hole is provided with a groove that mates with the clip. The clip engages in the groove, forming a snap-fit ​​connection between the cover body and the cover plate. The cover plate engages with the cover body, thereby facilitating the assembly or disassembly of the cover plate and the cover body, making assembly and disassembly more convenient and easier for the user to operate.

[0010] Specifically, a toothed protrusion protrudes from the cover body on one side of the drive wheel. This toothed protrusion engages with the contact frame of the contact system, forming a linkage between the drive wheel and the contact frame. The drive wheel drives the contact frame of the contact system through the toothed protrusion, thereby ensuring more reliable and smoother transmission between the drive wheel and the contact frame, which helps improve the operational reliability of the dual-power automatic transfer switch.

[0011] Specifically, a positioning hole is provided on the other side of the drive wheel, and a positioning shaft is provided inside the turntable. The positioning shaft is inserted into the positioning hole, forming a rotational connection between the drive wheel and the turntable. The drive wheel is engaged with the positioning shaft of the turntable, which facilitates the assembly of the turntable and the drive wheel, making assembly more convenient and ensuring more reliable transmission between the drive wheel and the turntable.

[0012] Specifically, the base is provided with a positioning groove that matches the shape of the turntable. The turntable is disposed within the positioning groove, and the motor shaft extends within the positioning groove. The turntable is provided with a snap-fit ​​groove that mates with the motor shaft. The motor shaft engages within the snap-fit ​​groove, forming a linkage between the motor shaft and the turntable. The turntable engaging with the motor shaft ensures easier assembly of the turntable and the motor shaft, and the positioning groove ensures more reliable transmission between the turntable and the motor shaft.

[0013] Specifically, the base is provided with a slot for placing an operating handle. One end of the operating handle engages in the slot, forming a snap-fit ​​connection between the operating handle and the base. The operating handle engaging with the base facilitates user operation and prevents it from being lost.

[0014] Specifically, a control circuit board assembly is installed within the base, and the control circuit board assembly is equipped with a micro switch for controlling the power supply. A locking plate for controlling the micro switch is slidably mounted on the base plate. The locking plate can slide back and forth on the base plate and can trigger the micro switch, thus enabling the micro switch to be turned on or off. A padlock hole is provided at one end of the locking plate, and a locking hole that mates with the padlock hole is provided on the base plate. By controlling the micro switch through the locking plate, the micro switch can control the power supply to the control circuit board assembly. During inspection and maintenance, the locking plate can be locked in the closed position, and the micro switch disconnects the power supply to the control circuit board assembly, thereby disabling the electric operation function of the automatic switching mechanism and ensuring the personal safety of maintenance personnel. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present invention.

[0016] Figure 2 This is an exploded view of an embodiment of the present invention.

[0017] Figure 3 This is an internal structural diagram of an embodiment of the present invention.

[0018] Figure 4 This is a perspective view of the drive wheel according to an embodiment of the present invention.

[0019] Figure 5 This is a perspective view of the turntable according to an embodiment of the present invention. Detailed Implementation

[0020] like Figures 1-5As shown, this embodiment of the invention is an automatic switching mechanism for a dual-power automatic transfer switch, including a base 10, a cover 11 disposed on the base 10, a motor 12 disposed within the base 10, and an energy storage conversion component 20. A receiving cavity 100 for housing the energy storage conversion component 20 is formed between the cover 11 and the base 10. The energy storage conversion component 20 includes a turntable 21 rotatably disposed on the base 10 and linked with the rotating shaft 121 of the motor 12, and a contact system rotatably disposed within the turntable 21 for driving the contact system to perform opening and closing operations. The drive wheel 22 and the energy storage torsion spring 23 are disposed between the turntable 21 and the drive wheel 22. Two elastic energy storage arms 221 are symmetrically arranged on the drive wheel 22. The turntable 21 is provided with a common energy storage release surface 211 and a spare energy storage release surface 212 that cooperate with the two elastic energy storage arms 221. The common energy storage release surface 211 and the spare energy storage release surface 212 move with the turntable 21 and can respectively abut against the two elastic energy storage arms 221, and can realize the energy storage release when the common power supply is turned on or the energy storage release when the spare power supply is turned on. An arc-shaped guide groove 213 is provided on the turntable 21 between the commonly used energy storage release surface 211 and the standby energy storage release surface 212. The arc-shaped guide groove 213 is connected to the commonly used energy storage release surface 211 and the standby energy storage release surface 212 by guide inclined surfaces 214. The two elastic energy storage arms 221 each have energy storage columns 222 extending in the arc-shaped guide groove 213. The energy storage columns 222 of the two elastic energy storage arms 221 can slide sequentially along the arc-shaped guide groove 213 and the guide inclined surfaces 214 to the commonly used energy storage release surface 211 or the standby energy storage release surface 212. The arc-shaped guide groove and guide slope guide the energy storage column of the elastic energy storage arm, ensuring that the elastic energy storage arm can stably and reliably store energy. When the elastic energy storage arm slides to the commonly used energy storage release surface or the standby energy storage release surface (i.e., passing the dead point), it can quickly release energy when the commonly used power supply is turned on or when the standby power supply is turned on, which helps to speed up the switching speed of the automatic switching mechanism. The drive wheel 22 is provided with matching energy storage locking grooves 223 at the energy storage columns 222 of the two elastic energy storage arms 221. The energy storage columns 222 move with the elastic energy storage arms 221 and are engaged in the energy storage locking grooves 223. The energy storage locking grooves on the drive wheel that engage with the energy storage columns ensure that the elastic energy storage arm can reliably store energy and quickly release energy, achieving rapid switching of the automatic switching mechanism and realizing the purpose of fast opening and closing.

[0021] like Figure 2As shown, a handle insertion hole 215 is provided on the outer peripheral wall of the turntable 21, and a through hole 111 is provided on the cover 11 corresponding to the handle insertion hole 215. A cover plate 13 is provided on the cover 11, which closes into the through hole 111. The handle insertion hole on the turntable allows the user to manually operate the automatic conversion mechanism by operating the handle. The cover plate also provides protection, preventing dust and debris from falling into the energy storage conversion component, thus improving the reliability of the automatic conversion mechanism. Each end of the cover plate 13 has a clip 131, and the through hole 111 has a slot 112 that engages with the clip 131. The clip 131 engages in the slot 112, forming a snap-fit ​​connection between the cover 11 and the cover plate 13. The cover plate's engagement with the cover facilitates assembly and disassembly, making assembly and disassembly more convenient and user-friendly. A toothed protrusion 225 protruding from the cover 11 is provided on one side of the drive wheel 22. The toothed protrusion 225 engages with the contact frame of the contact system, forming a linkage between the drive wheel 22 and the contact frame. The drive wheel drives the contact frame of the contact system through the toothed protrusion, thereby ensuring more reliable and stable transmission between the drive wheel and the contact frame, which is beneficial to improving the operational reliability of the dual-power automatic transfer switch. A positioning hole 226 is provided on the other side of the drive wheel 22. A positioning shaft 216 is provided inside the turntable 21. The positioning shaft 216 passes through the positioning hole 226, forming a rotational connection between the drive wheel 22 and the turntable 21. The drive wheel engages with the positioning shaft of the turntable, which facilitates the assembly of the turntable and the drive wheel, making assembly more convenient and ensuring more reliable transmission between the drive wheel and the turntable. The base 10 is provided with a positioning groove 101 that matches the shape of the turntable 21. The turntable 21 is disposed within the positioning groove 101, and the rotating shaft 121 of the motor 12 extends within the positioning groove 101. The turntable 21 is provided with a snap-fit ​​groove that mates with the rotating shaft 121 of the motor 12. The rotating shaft 121 of the motor 12 is snapped into the snap-fit ​​groove, thus forming a linkage between the rotating shaft 121 of the motor 12 and the turntable 21. The turntable snaps into the rotating shaft of the motor, thereby ensuring the assembly of the turntable and the rotating shaft of the motor, making assembly more convenient. Furthermore, the positioning of the turntable within the positioning groove ensures more reliable transmission between the turntable and the rotating shaft of the motor.

[0022] like Figure 1 and 2As shown, the base 10 is provided with a slot 102 for placing an operating handle 14. One end of the operating handle 14 is engaged in the slot 102, forming a snap-fit ​​connection between the operating handle and the base. The operating handle is engaged with the base, facilitating user operation and preventing loss. A control circuit board assembly 15 is provided inside the base 10. The control circuit board assembly 15 is provided with a micro switch 16 for controlling the power supply. A locking plate 17 for controlling the micro switch 16 is slidably disposed on the base plate 103 of the base 10. The locking plate 17 can slide back and forth on the base plate 103 and can trigger the micro switch 16, thus enabling the micro switch 16 to be turned on or off. A padlock hole 171 is provided at one end of the locking plate 17, and a locking hole 104 that mates with the padlock hole 171 is provided on the base plate 103. The micro switch is controlled by the locking plate. The micro switch can control the power supply of the control circuit board assembly to be turned on or off. During inspection and maintenance, the locking plate can be locked in the closed position, and the micro switch will disconnect the power supply of the control circuit board assembly, thereby turning off the electric operation function of the automatic switching mechanism and ensuring the personal safety of maintenance personnel.

[0023] This automatic transfer mechanism adopts an energy storage structure design. The energy storage conversion component enables rapid switching of the automatic transfer mechanism, resulting in a shorter switching time. This allows the dual-power automatic transfer switch to quickly open and close, and enhances its breaking capacity. During operation, the motor drives the turntable to rotate, compressing the energy storage torsion spring to store energy. When the commonly used energy storage release surface and the standby energy storage release surface on the turntable contact the two elastic energy storage arms (passing the dead point), the energy storage torsion spring releases energy. This allows for rapid release of energy when the commonly used power supply is closed or when the standby power supply is closed, achieving the purpose of rapid switching of the automatic transfer mechanism and effectively improving the breaking capacity of the dual-power automatic transfer switch. Therefore, this automatic transfer mechanism has the advantages of simple structure, stable and reliable performance, low cost, small size, and rapid switching.

Claims

1. An automatic switching mechanism for a dual-power automatic transfer switch, characterized in that: The device includes a base, a cover mounted on the base, a motor housed within the base, and an energy storage conversion assembly. A cavity for housing the energy storage conversion assembly is formed between the cover and the base. The energy storage conversion assembly includes a turntable rotatably mounted on the base and linked to the motor shaft, a drive wheel rotatably mounted within the turntable for driving a contact system to perform opening and closing operations, and an energy storage torsion spring between the turntable and the drive wheel. Two elastic energy storage arms are symmetrically arranged on the drive wheel. The turntable contains a commonly used energy storage release surface and a spare energy storage release surface, each corresponding to one of the two elastic energy storage arms. The commonly used and spare energy storage release surfaces move with the turntable and can respectively abut against the two elastic energy storage arms. It can realize the energy storage and release when the main power supply is turned on or when the backup power supply is turned on. The turntable is provided with an arc-shaped guide groove between the main energy storage and release surface and the backup energy storage and release surface. The arc-shaped guide groove is connected to the main energy storage and release surface and the backup energy storage and release surface by guide slopes respectively. The two elastic energy storage arms are respectively provided with energy storage columns extending in the arc-shaped guide groove. The energy storage columns of the two elastic energy storage arms can slide sequentially along the arc-shaped guide groove and the guide slope to the main energy storage and release surface or the backup energy storage and release surface. The drive wheel is provided with matching energy storage locking grooves at the energy storage columns of the two elastic energy storage arms respectively. The energy storage columns move with the elastic energy storage arms and are locked in the energy storage locking grooves.

2. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 1, characterized in that: The turntable has a handle insertion hole on its outer peripheral wall, and the cover has a through hole corresponding to the handle insertion hole. The cover has a cover plate that fits into the through hole.

3. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 2, characterized in that: The cover plate has clips at both ends, and the through hole has a slot that matches the clip. The clips engage in the slots, forming a snap-fit ​​connection between the cover body and the cover plate.

4. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 1, characterized in that: The drive wheel has a toothed protrusion protruding from the cover body on one side. The toothed protrusion engages with the contact frame of the contact system, and forms a linkage between the drive wheel and the contact frame.

5. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 1, characterized in that: A positioning hole is provided on the other side of the drive wheel, and a positioning shaft is provided inside the turntable. The positioning shaft is inserted into the positioning hole and forms a rotational connection between the drive wheel and the turntable.

6. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 1, characterized in that: The base is provided with a positioning groove that matches the shape of the turntable. The turntable is set in the positioning groove, and the motor shaft extends into the positioning groove. The turntable is provided with a snap-fit ​​groove that cooperates with the motor shaft. The motor shaft is snapped into the snap-fit ​​groove, thus forming a linkage between the motor shaft and the turntable.

7. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 1, characterized in that: The base is provided with a slot for placing the operating handle. One end of the operating handle is engaged in the slot, forming a snap-fit ​​connection between the operating handle and the base.

8. The automatic switching mechanism of the dual-power automatic transfer switch according to claim 1, characterized in that: The base contains a control circuit board assembly, which has a micro switch for controlling the power supply. A locking plate for controlling the micro switch is slidably mounted on the base plate. The locking plate can slide back and forth on the base plate and can trigger the micro switch, thus enabling the micro switch to be turned on or off. A padlock hole is provided at one end of the locking plate, and a locking hole that cooperates with the padlock hole is provided on the base plate.

Images