Buffer device for change-over switch and change-over switch
By designing a buffer device in the changeover switch, the kinetic energy is absorbed by the compression buffer of the adapter, which solves the problems of complex structure and poor buffering effect of traditional buffer devices, and achieves the effect of reducing impact force and extending service life.
Patent Information
- Application Number
- CN202520505543.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Traditional changeover switches have complex buffer structures and limited buffering effects, which cannot effectively reduce the impact force during mechanism operation and affect service life.
Design a buffer device that contacts the output shaft via an adapter and rotates around the rotating part to compress the buffer, absorb the kinetic energy of the mechanism, reduce the operating speed, and reduce the impact between the contacts.
It effectively reduces the impact force when the changeover switch mechanism operates, extends its service life, and improves safety.
Smart Images
Figure CN223941691U_ABST
Abstract
Description
Technical Field
[0001] The exemplary embodiments disclosed herein generally relate to the field of electrical equipment, and particularly to buffer devices and changeover switches for changeover switches. Background Technology
[0002] A dual power transfer switch is an electrical device used for automatic or manual switching between two different power sources, primarily used in applications requiring high power supply reliability. It can detect parameters such as voltage and frequency of both power sources. When one power source fails or experiences a power outage, it can quickly switch the load to the other normal power source, ensuring continuous power supply and effectively preventing equipment shutdowns and production interruptions caused by power outages. Utility Model Content
[0003] In a first aspect of this disclosure, a buffer device for a changeover switch is provided. The buffer device includes: at least one buffer coupled to a frame of the changeover switch; and at least one adapter rotatably disposed between the at least one buffer and an output shaft of the changeover switch mechanism, each adapter including: a rotating portion rotatably coupled to the frame; an input end disposed on a first side of the rotating portion in a radial direction and protruding from the rotating portion in the first radial direction to contact the output shaft during operation of the changeover switch mechanism and be pushed by the output shaft to rotate the adapter about the rotating portion; and an output end disposed on a second side of the rotating portion in a radial direction and protruding from the rotating portion in the second radial direction to compress a corresponding buffer during rotation of the adapter about the rotating portion.
[0004] In some embodiments, the first radial direction and the second radial direction have a predetermined non-zero angle.
[0005] In some embodiments, there is a predetermined ratio between the first length of the input end protruding along a first radial direction and the second length of the output end protruding along a second radial direction.
[0006] In some embodiments, the buffer is one of a hydraulic buffer, a pneumatic buffer, or a spring buffer.
[0007] In some embodiments, the rotating part, the input end, and the output end are integrally formed.
[0008] In some embodiments, a first end of the buffer is rotatably coupled to the rack, and a second end of the buffer opposite the first end is rotatably coupled to the output.
[0009] In some embodiments, a first end of the buffer is fixedly coupled to the rack, and a second end of the buffer abuts against the output end of the adapter relative to the first end.
[0010] In some embodiments, at least one buffer includes two buffers; and at least one adapter includes two adapters corresponding to two mechanisms of the changeover switch respectively, wherein two rotating portions of the two adapters are aligned on an axis and fixedly connected to establish an interlock between the two mechanisms.
[0011] In some embodiments, the buffer device further includes a coupling portion disposed between the two adapters.
[0012] According to the buffer device provided in this disclosure, the adapter can contact the output shaft of the mechanism during the operation of the changeover switch and be pushed by the output shaft to rotate around the rotating part, thereby compressing the buffer at the output end of the adapter. In this way, the buffer can absorb the kinetic energy of the mechanism's operation when compressed. This reduces the operating speed of the mechanism and decreases the impact between the contacts during the mechanism's operation.
[0013] In a second aspect of this disclosure, a changeover switch is provided. The changeover switch includes: a frame; at least one mechanism coupled to the frame and adapted to be driven to operate between a closed position and an open position; and a buffer device according to the first aspect of this disclosure, disposed on the frame and adapted to buffer the operation of the mechanism.
[0014] It should be understood that the content described in this content section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:
[0016] Figure 1 A schematic diagram of the overall structure of a buffer device according to some embodiments of the present disclosure is shown;
[0017] Figure 2 A schematic diagram of the overall structure of the adapter according to some disclosed embodiments is shown;
[0018] Figure 3 and Figure 4 Schematic diagrams of buffer devices according to some embodiments of the present disclosure in different operating states are shown respectively;
[0019] Figure 5 A schematic diagram of an adapter according to some other embodiments of the present disclosure is shown; and
[0020] Figure 6A schematic diagram of a buffer device according to some other embodiments of the present disclosure is shown. Detailed Implementation
[0021] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0022] It should be noted that the headings of any section / subsection provided herein are not limiting. Various embodiments are described throughout this document, and embodiments of any type may be included under any section / subsection. Furthermore, embodiments described in any section / subsection may be combined in any way with any other embodiments described in the same section / subsection and / or different sections / subsections.
[0023] In the description of embodiments of this disclosure, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may also be included below. The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.
[0024] As briefly mentioned earlier, in order for the changeover switch to quickly switch between power sources, the switch mechanism stores energy in advance, causing the internal spring to rotate past a critical point. When a switch needs to be performed, the mechanism can move quickly under the elastic force of the spring.
[0025] However, the rapid movement of the mechanism can generate significant impact forces between the contacts, potentially damaging them or affecting their lifespan. To reduce these impact forces, a buffer device is typically incorporated into the changeover switch. Traditional buffer devices are complex in structure and have limited buffering effectiveness.
[0026] The buffer device and changeover switch for a changeover switch provided in this disclosure solve, or at least partially solve, the aforementioned problems and other potential problems existing in conventional solutions. According to the buffer device provided in the embodiments of this disclosure, the adapter can contact the output shaft of the mechanism during the operation of the changeover switch and be pushed by the output shaft to rotate about the rotating part, thereby compressing the buffer at the output end of the adapter. In this way, the buffer can absorb the kinetic energy of the mechanism operation when compressed. This reduces the operating speed of the mechanism and reduces the impact between the contacts during mechanism operation.
[0027] According to embodiments of this disclosure, a changeover switch generally includes a frame, a mechanism disposed within the frame, and a buffer device coupled to the frame. The mechanism is adapted to be driven to perform a closing or opening operation. The buffer device is disposed within the changeover switch and coupled to the frame of the changeover switch. The buffer device is adapted to contact the output shaft of the mechanism during the operation of the mechanism of the changeover switch and reduce the kinetic energy of the mechanism operation, thereby reducing the impact force between the moving and stationary contacts of the changeover switch. Specifically, the mechanism of the changeover switch can operate during an abnormal power supply to the line connected to the changeover switch (e.g., a mains power failure). The output shaft of the mechanism rotates between the closing and opening positions under the action of an internal spring. Exemplarily, if the output shaft of the mechanism rotates from the opening position to the closing position under the action of the spring, the moving contact of the changeover switch moves towards the stationary contact. Simultaneously, the output shaft contacts the buffer device, which partially absorbs the kinetic energy of the output shaft, thereby reducing the impact between the moving and stationary contacts.
[0028] Figure 1 A schematic diagram of the overall structure of a buffer device according to some embodiments of the present disclosure is shown. Figure 1 As shown, the buffer device generally includes at least one buffer 1 and at least one adapter 2. The buffer 1 and the adapter 2 are respectively coupled to the frame 3 of the changeover switch, and the adapter 2 is arranged between the buffer 1 and the output shaft 4 of the changeover switch mechanism. The adapter is adapted to transmit the kinetic energy of the output shaft to the buffer 1 so that the buffer 1 can absorb it.
[0029] Figure 2 A schematic diagram of the overall structure of the adapter 2 according to some disclosed embodiments is shown, such as... Figure 2As shown, the adapter 2 includes a rotating portion 21 rotatably coupled to the frame 3, and the adapter 2 can rotate relative to the frame 3 about the axis of the rotating portion 21. An input end 22 protrudes from a first radial side of the rotating portion 21, extending in the first radial direction and partially coinciding with the movement path of the output shaft 4. The output shaft 4 can contact the input end 22 during operation, thereby causing the adapter 2 as a whole to rotate about the axis of the rotating portion 21. An output end 23 protrudes from a second radial side of the rotating portion 21. The output end 23 extends to the buffer 1 in the second radial direction of the rotating portion 21. In this way, during the rotation of the adapter 2 about the axis of the rotating portion 21 driven by the output shaft 4, the output end 23 of the rotating portion 21 can compress the buffer 1, thereby absorbing the kinetic energy of the output shaft 4 transmitted by the adapter 2.
[0030] In some embodiments, the rotating part 21, the input end 22, and the output end 23 may be integrally formed. In some other embodiments, the rotating part 21, the input end 22, and the output end 23 may also be constructed separately and connected together by means such as fastener connection, snap-fit connection, welding, etc.
[0031] Figure 3 and Figure 4 Schematic diagrams illustrating different operating states of a buffer device according to some embodiments of the present disclosure are shown. For example... Figure 3 and Figure 4 As shown, and in combination Figure 1 , Figure 1 The output shaft 4 of the intermediate mechanism is in the open position, and there is a predetermined distance between the output shaft 4 and the input end 22 of the adapter 2. When the mechanism is activated, the output shaft 4 can swing toward the adapter 2. Figure 3 The output shaft 4 of the intermediate mechanism moves to the closed position and rotates to the critical position where it contacts the input end 22 of the adapter 2. Figure 4 The output shaft 4 of the middle mechanism is Figure 3 The state continues to oscillate, driving the adapter 2 to rotate. The output end 23 of the adapter 2 pushes the piston rod towards the cylinder (that is, compresses the buffer 1). Thus, the buffer 1 can absorb the kinetic energy of the output shaft 4, reducing the speed of the output shaft 4.
[0032] Return to reference Figure 2 ,like Figure 2 As shown, in some embodiments, there is a predetermined non-zero angle between the first radial direction protruding from the input end 22 and the second radial direction protruding from the output end 23. In this way, the adapter 2 can distinguish the direction of movement of the output shaft 4 from the compression direction of the buffer 1, thereby optimizing the layout of the functional modules within the switch.
[0033] In some embodiments, the first length of the input end 22 protruding along the first radial direction (i.e., the distance from the input end 22 to the rotating part 21) and the second length of the output end 23 protruding along the second radial direction (i.e., the distance from the output end 23 to the rotating part 21) in the adapter 2 have a predetermined ratio. In this way, the output shaft 4 only contacts the input end 22 of the adapter 2 when it has moved to the latter half of its travel (e.g., the output shaft 4 is 3mm away from the closing position). That is, the output shaft 4 rotates rapidly without restriction in the first half of its travel, while it is slowed down by the buffer device in the latter half of its travel. Thus, the buffer device can buffer the movement of the mechanism without significantly affecting the closing time, ensuring the normal switching of the changeover switch.
[0034] In some embodiments, the buffer 1 may be at least one or an arbitrary combination of a hydraulic buffer 1, a pneumatic buffer 1, and a spring buffer 1. Taking the hydraulic buffer 1 as an example, the cylinder of the hydraulic buffer 1 may be coupled to the frame 3, and the piston rod of the hydraulic buffer 1 extends toward the output end 23 of the adapter 2. In some embodiments, the cylinder of the buffer 1 may be rotatably connected to the frame 3, and the piston rod of the buffer 1 may be rotatably connected to the output end 23. Furthermore, the first axis of rotation defined by the buffer 1 and the frame 3 is parallel to the second axis of rotation defined by the buffer 1 and the adapter 2. In some other embodiments, the cylinder of the buffer 1 may also be fixedly coupled to the frame 3, and the piston rod of the buffer 1 extends toward the output end 23 of the adapter 2 and abuts against the output end 23 when the adapter 2 is driven by the output shaft 4.
[0035] Figure 5 A schematic diagram of an adapter 2 according to some embodiments of the present disclosure is shown. Figure 6 A schematic diagram of a buffer device according to some embodiments of the present disclosure is shown. Figure 5 and Figure 6 As shown, in some embodiments, the buffer device includes two adapters 2 and two buffers 1. The two adapters 2 correspond to the two mechanisms of the changeover switch, respectively, to buffer the operation of the two mechanisms.
[0036] In some embodiments, the rotating portions 21 of the two adapters 2 are aligned on the axis and fixed to each other. After the two adapters 2 are fixed to each other, an interlock can be established between the two mechanisms of the changeover switch. That is, if the first output shaft of the first mechanism operates, the two adapters 2 can rotate (e.g., clockwise) around the axis of the rotating portion 21 under the drive of the first output shaft. At this time, the two adapters 2 can restrict the operation of the second output shaft of the second mechanism, which is different from the first mechanism. The first mechanism and the second mechanism cannot perform closing operations simultaneously, improving the safety of the changeover switch.
[0037] In some embodiments, a coupling portion 24 may be provided between the two adapters 2, which can be coupled to the two adapters 2 respectively to improve the overall strength of the two adapters 2. In some embodiments, the two adapters 2 and the coupling portion 24 between the two adapters 2 may be integrally formed, thereby improving structural strength and facilitating manufacturing. For example, the two adapters 2 and the coupling portion 24 may be disc-shaped as a whole.
[0038] Various implementations of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed implementations. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described implementations. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to technology in the market, or to enable others skilled in the art to understand the various implementations disclosed herein.
Claims
1. A buffer device for a changeover switch, characterized in that, include: At least one buffer (1) is coupled to the rack (3) of the changeover switch; as well as At least one adapter (2) is rotatably arranged between the at least one buffer (1) and the output shaft (4) of the mechanism of the changeover switch, and each adapter (2) of the at least one adapter (2) includes: Rotating part (21) is rotatably coupled to the frame (3); The input end (22) is arranged on the first side of the rotating part (21) in the radial direction and protrudes from the rotating part (21) in the first radial direction to contact the output shaft (4) during the mechanical operation of the changeover switch, and is pushed by the output shaft (4) to drive the adapter (2) to rotate about the rotating part (21); and The output end (23) is arranged on the second side of the rotating part (21) along the radial direction and protrudes from the rotating part (21) along the second radial direction to compress the corresponding buffer (1) during the rotation of the adapter (2) around the rotating part (21).
2. The buffer device according to claim 1, characterized in that, The first radial direction and the second radial direction have a predetermined non-zero angle.
3. The buffer device according to claim 1, characterized in that, The first length of the input end (22) protruding in the first radial direction has a predetermined ratio to the second length of the output end (23) protruding in the second radial direction.
4. The buffer device according to claim 1, characterized in that, The buffer (1) is one of a hydraulic buffer (1), a pneumatic buffer (1), or a spring buffer (1).
5. The buffer device according to claim 1, characterized in that, The rotating part (21), the input end (22) and the output end (23) are integrally formed.
6. The buffer device according to any one of claims 1-5, characterized in that, The first end of the buffer (1) is rotatably coupled to the rack (3), and the second end of the buffer (1) opposite to the first end is rotatably coupled to the output end (23).
7. The buffer device according to any one of claims 1-5, characterized in that, The first end of the buffer (1) is fixedly coupled to the frame (3), and the second end of the buffer (1) abuts against the output end (23) of the adapter (2) relative to the first end.
8. The buffer device according to any one of claims 1-5, characterized in that, The at least one buffer (1) includes two buffers (1); and The at least one adapter (2) includes two adapters (2) to correspond to the two mechanisms of the changeover switch respectively, and The two rotating parts (21) of the two adapters (2) are aligned and fixedly connected on the axis so that the two adapters (2) establish an interlock between the two mechanisms.
9. The buffer device according to claim 8, characterized in that, It also includes a coupling part (24) arranged between the two adapters (2).
10. A changeover switch, characterized in that, include: Rack (3); At least one mechanism is coupled to the frame (3) and adapted to be driven to operate between the closed position and the open position; as well as The buffer device according to any one of claims 1-9 is arranged on the frame (3) and is adapted to buffer the action of the mechanism.