Dual power transfer switch with locking mechanism

Abstract

A double power transfer switch with locking mechanism, comprising a motion conversion mechanism, a manual driving mechanism, an automatic driving mechanism and a locking mechanism; the motion conversion mechanism has a protruding block; the manual driving mechanism is rotatable under external force and is provided with a first top block and a fourth top block arranged in layers; a first torsion spring is arranged between the motion conversion mechanism and the manual driving mechanism to enable the rotation thereof; the locking mechanism comprises a first limiting piece and a second limiting piece, the bottom of the first limiting piece and the second limiting piece is provided with a clearance slot adapted to the first top block and the second top block to release the rotation restriction of the motion conversion mechanism. Compared with the existing double power transfer switch, the double power transfer switch of the present application has a simple and compact structure, and improves the problems of the existing double power transfer switch, such as many locking mechanism parts, complex structure and difficult assembly.

Description

Technical Field

[0001] This invention relates to the field of dual power supply switch technology, and more specifically to a dual power supply transfer switch with a locking mechanism. Background Technology

[0002] Dual-power switching devices employ a primary and backup dual-power supply system to ensure that if one power source fails and loses power, the other power source can be immediately put into use, thus guaranteeing power continuity. Existing dual-power transfer switches generally have an automatic drive mechanism, a manual drive mechanism, and a motion switching mechanism. The automatic drive mechanism can automatically switch between the primary and backup power sources, thereby achieving power conversion; if the automatic drive mechanism fails, the manual drive mechanism can be used to switch the power source. Both the automatic and manual drive mechanisms switch power by driving the motion switching mechanism to rotate.

[0003] To precisely control the rotation of the motion switching mechanism and thus achieve power switching, the dual power transfer switch is also equipped with a locking mechanism to lock or unlock the motion switching mechanism. For example, Chinese patent "CN101395685 B" discloses an automatic control module for an electrical circuit breaker and an electrical circuit breaker equipped with such a control module, wherein, for example... Figure 1 As shown, the manual operating mechanism 60 is equipped with a second ratchet 68, a gear 62, and four symmetrically distributed second pawls 67. Each second ratchet 68 has teeth 68', the gear 62 has two second cams 65, and each second pawl 67 has a section 67c that mates with the teeth 68' and a section 67a that mates with the second cams 65. Under normal conditions, the manual operating mechanism 60 is locked under the action of the teeth 68' and the section 67c. When the gear 62 is rotated, the second cams 65 lift the second pawls 67, releasing the ratchet 68 and allowing the drive shaft 50 to rotate in the same direction under the action of the torsion spring 66. After rotating a certain angle, the second pawls 67 engage with the teeth 68' of the second ratchet 68, thereby locking their rotation. In the above structure, the drive spindle 50 needs to be driven to rotate by the second ratchet 68. The rotation of the second ratchet 68 can only be achieved by the cooperation between the four second pawls 67 and the second ratchet 68. The entire transmission structure has many parts, is complex, difficult to install, and has high operating costs.

[0004] Chinese patent CN 106887356 B discloses a transmission device for a power switch and a power switch including the transmission device, such as... Figure 2As shown, the diagram discloses four stop members, an input shaft 10, and an output shaft 20. The input shaft 10 has two cam surfaces 18 spaced apart in the circumferential direction, namely a first cam surface 181 and a second cam surface 182. These two cam surfaces can lift the stop mechanism 40. Three protrusions 26 (serving as abutments) are spaced apart in the circumferential direction on the output shaft 20, namely a first protrusion 261, a second protrusion 262, and a third protrusion 263. Similar to the prior art, when the input shaft 10 is rotated, the first cam surface 181 or the second cam surface 182 lifts the stop member, thereby releasing the rotation restriction of the stop mechanism 40 on the protrusions 26 on the output shaft 20, i.e., releasing the rotation restriction on the output shaft 20. After rotating a certain angle, the stop mechanism 40 then restricts the protrusions 26 again, thereby restricting the rotation of the output shaft 20. The above structure also uses four stop mechanisms 40 to unlock or lock the protrusions 26, which is complex, difficult to install, and increases the operating cost. Summary of the Invention

[0005] To address the problems of numerous components and complex structures in the locking mechanisms of existing dual-power transfer switches, which lead to difficulties in installation and use and increased production and operating costs, this invention provides a dual-power transfer switch with a locking mechanism. This switch utilizes a clearance groove to allow the protrusion to avoid obstruction during rotation. Its structure is both simple and compact, improving upon the issues of numerous components, complex structures, and difficult assembly in existing dual-power transfer switches, thereby reducing production and operating costs.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows.

[0007] A dual power transfer switch with a locking mechanism includes:

[0008] A manual drive mechanism includes a first rotating member, a shaft hole at the middle position of the first rotating member, the first rotating member being used to rotate around its shaft hole under the action of external force, and an annular body coaxially arranged on the end face of the first rotating member, the annular body being provided with a first top block and a fourth top block;

[0009] A motion conversion mechanism includes a linkage component, the linkage component having a first rotating shaft connected to the shaft hole, and the outer side wall of the linkage component having a protrusion.

[0010] The locking mechanism includes a first limiting member and a second limiting member with rotatable ends, the first limiting member and the second limiting member being used to lock the protrusion;

[0011] The first torsion spring is located between the first rotating member and the linkage member. When the dual power supply switch is locked, it can store energy from the rotation of the first rotating member and release energy to drive the linkage member to move in the same direction as the first rotating member after the protrusion is unlocked.

[0012] The first top block and the fourth top block are arranged in layers along the shaft hole direction;

[0013] The bottom of the first limiting member is provided with a first clearance groove that is disposed at the same layer as the fourth top block, and the bottom of the second limiting member is provided with a second clearance groove that is disposed at the same layer as the first top block.

[0014] In the locked state, the end faces of the first limiting member and the second limiting member abut against the left and right sides of the protrusion, respectively.

[0015] When the first top block is locked, it is driven by the first rotating member to rotate clockwise, and can rotate until it pushes the second limiting member out of the top surface of the protrusion, thereby releasing the clockwise rotation restriction of the linkage member. Alternatively, when the fourth top block is locked, it is driven by the first rotating member to rotate counterclockwise, and can rotate until it pushes the second limiting member out of the top surface of the protrusion, thereby releasing the counterclockwise rotation restriction of the linkage member. During the rotation, the first top block avoids the second limiting member through the second clearance groove, and the fourth top block avoids the first limiting member through the first clearance groove.

[0016] Furthermore, the motion conversion mechanism includes a linkage component coaxially arranged and interconnected with the manual drive mechanism. The outer side wall of the linkage component is provided with the protrusion. The outer side wall of the linkage component and located on both sides of the protrusion are respectively provided with a first limiting groove and a second limiting groove. The first limiting groove cooperates with the first limiting component, and the second limiting groove cooperates with the second limiting component.

[0017] Furthermore, the bottom of the first limiting member is provided with a first limiting block adapted to the first limiting groove, and the bottom of the second limiting member is provided with a second limiting block adapted to the second limiting groove; the first limiting groove and the first limiting block are used to lock the rotation of the linkage member after it rotates clockwise; the second limiting groove and the second limiting block are used to lock the rotation of the linkage member after it rotates counterclockwise.

[0018] Furthermore, a second top block and a third top block are provided between the first top block and the fourth top block, arranged in layers along the direction of the shaft hole; the first top block and the third top block are arranged in the same layer, and the second top block and the fourth top block are arranged in the same layer.

[0019] After the locking linkage rotates counterclockwise, the first rotating member rotates in the opposite direction, allowing the second top block to rotate until it pushes the second limiting member out of the second limiting groove, thereby releasing the restriction on the clockwise rotation of the linkage; or after the locking linkage rotates clockwise, the first rotating member rotates in the opposite direction, allowing the third top block to rotate until it pushes the first limiting member out of the first limiting groove, thereby releasing the restriction on the counterclockwise rotation of the linkage.

[0020] Furthermore, the first top block and the fourth top block, as well as the second top block and the third top block, are symmetrically arranged about the protrusion on the radial cross-sectional projection of the linkage.

[0021] Furthermore, the bottom of the first limiting member is provided with a first clearance block arranged at the same level as the first top block and the third top block. The first clearance block is used to release the locking of the first limiting member to the linkage member when the first top block or the third top block rotates to its bottom. The bottom of the second limiting member is provided with a second clearance block arranged at the same level as the second top block and the fourth top block. The second clearance block is used to release the locking of the second limiting member to the linkage member when the second top block or the fourth top block rotates to its bottom.

[0022] Furthermore, the first limiting groove and the second limiting groove are symmetrically arranged relative to the protrusion.

[0023] Furthermore, the first rotating member has a positioning plate on its end face relative to the linkage member, and the end face of the positioning plate abuts against the end face of the first rotating member.

[0024] The aforementioned dual power supply changeover switch includes a bracket with a connection hole. The first and second limiting members are each provided with a hinge shaft that is hinged to the corresponding connection hole. A trigger rod extends from the hinge shaft in a direction away from the protrusion.

[0025] Compared with the locking mechanism of existing dual-power transfer switches, the advantages of the dual-power transfer switch of the present invention are as follows: A first limiting member and a fourth limiting member are respectively provided on both sides of the protrusion, and a first clearance groove and a second clearance groove are provided at its bottom. During rotation, the first top block avoids the second limiting member through the second clearance groove, and the fourth top block avoids the first limiting member through the first clearance groove. The mutual cooperation between the first top block and the second clearance groove, and between the fourth top block and the first clearance groove, ensures that the top blocks do not interfere with the limiting members during rotation, thereby unlocking the protrusion. The above structure is both simple and compact, improving the problems of numerous parts, complex structure, and difficult assembly of the locking mechanism of existing dual-power transfer switches, which helps to reduce the production and use costs of dual-power transfer switches. Attached Figure Description

[0026] Figure 1 An exploded view of the control module (including manual operating mechanism) of the prior art CN101395685B;

[0027] Figure 2 This is an exploded view of the transmission device in the prior art CN106887356B;

[0028] Figure 3 This is an exploded perspective view of the dual power supply transfer switch of the present invention;

[0029] Figure 4 An exploded perspective view of the driven gear, motion conversion mechanism, and support.

[0030] Figure 5 This is a perspective view of the support frame;

[0031] Figure 6 This is a perspective view of the driven gear;

[0032] Figure 7 This is an assembly diagram of the limiting components, linkage components, and bracket;

[0033] Figure 8 This is a top view of the driven gear;

[0034] Figure 9 Perspective view of the first limiting member;

[0035] Figure 10 A perspective view of the first limiting member from another direction;

[0036] Figure 11 Perspective view of the second limiting member;

[0037] Figure 12 A perspective view of the second limiting member from another direction;

[0038] Figures 13a-13c This is a schematic diagram showing the state when the power supply is in position 0.

[0039] Figures 14a-14c This is a schematic diagram showing the state when the power supply is in position I;

[0040] Figures 15a-15c This is a schematic diagram showing the state of the power supply when it is in position II.

[0041] Figure 16 This is the main view of the linkage component;

[0042] 1. Manual drive mechanism; 11. Drive gear; 111. Shaft sleeve; 12. Driven gear; 121. Ring body; 1211. Top block; 1211a. First top block; 1211b. Second top block; 1211c. Third top block; 1211d. Fourth top block; 122. Shaft hole;

[0043] 2. Motion conversion mechanism; 21. Linkage component; 211. Protrusion; 212. Limiting groove; 212a. First limiting groove; 212b. Second limiting groove; 213. First rotating shaft; 22. Motion conversion mechanism body;

[0044] 3. Automatic drive mechanism;

[0045] 4. Locking mechanism; 41. Limiting component; 42. First limiting component; 421. First hinge shaft; 422. First clearance block; 423. First clearance groove; 424. First limiting block; 425. First trigger rod; 43. Second limiting component; 431. Second hinge shaft; 432. Second clearance groove; 433. Second clearance block; 434. Second limiting block; 435. Second trigger rod; 44. Elastic reset component;

[0046] 5. First torsion spring;

[0047] 6. Bracket; 61. Through hole; 62. Connecting post; 63. Connecting hole;

[0048] Plane A; Plane B. Detailed Implementation

[0049] In the description of this invention, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of the different embodiments or examples, without contradiction.

[0052] The following is in conjunction with the appendix Figure 2-1 5. Further explanation of the technical solution of the present invention.

[0053] Example 1

[0054] A dual power transfer switch with a locking mechanism, such as Figure 1 As shown, the device includes a housing and, within the housing, a manual drive mechanism 1, a motion conversion mechanism 2, an automatic drive mechanism 3, a locking mechanism 4, and a circuit switching device (not shown). Both the manual drive mechanism 1 and the automatic drive mechanism 3 can drive the motion conversion mechanism 2 to rotate, thereby causing the circuit switching device to rotate to complete the circuit switching. The locking mechanism 4 can restrict or unlock the rotation of the motion conversion mechanism 2. Of the above mechanisms, the automatic drive mechanism 3 and the circuit switching device can be existing commonly used mechanisms, which will not be described in detail here.

[0055] like Figure 3-4 As shown, the manual drive mechanism 1 includes a horizontally arranged second rotating member and a vertically arranged first rotating member. The first and second rotating members are respectively a driven gear 12 and a driving gear 11, which mesh with each other. As can be seen from the figure, the teeth on the driven gear 12 and the driving gear 11 are partial teeth, which achieves motion transmission between the driven gear 12 and the driving gear 11 while saving internal space. The driving gear 11 has a shaft sleeve 111, with a shaft hole 122 in the middle. The user can use a wrench to engage in the shaft sleeve 111 to rotate the driving gear 11, thereby driving the driven gear 12 to rotate around the shaft hole 122. The motion conversion mechanism 2 includes a linkage member 21 and a motion conversion mechanism body 22, which are relatively fixed during assembly. The linkage member 21 has a first rotating shaft 213 integrally formed with it, and the first rotating shaft 213 is coaxially arranged with the shaft hole 122. When the linkage member 21 rotates, it drives the motion conversion mechanism body 22 to rotate in the same direction. The first rotating shaft 213 of the linkage 21 is connected to the shaft hole 122 of the driven gear 12. The two are coaxially arranged and can rotate relative to each other. A first torsion spring 5 is provided between the linkage 21 and the driven gear 12 to drive the linkage 21 to rotate in the same direction. In use, the user rotates the driving gear 11, thereby driving the driven gear 12 to rotate, which in turn drives the motion conversion mechanism 2 to rotate. It should be noted that the two ends of the first torsion spring 5 are respectively connected to the driven gear 12 and the linkage 21. This connection is a common method in the art and will not be described in detail here.

[0056] The rotation process of the aforementioned linkage 21 can be specifically divided into: when the linkage 21 is not rotating, it is in position 0; when the linkage 21 rotates along... Figure 4 After rotating clockwise, the power supply can be in the first power-on position (position I). When rotated clockwise... Figure 4 After rotating counterclockwise, the power supply can be switched to the second power-on position (position II), meaning the power supply can be switched to the main power supply or the backup power supply.

[0057] like Figure 4 As shown, the linkage 21 is provided with a protrusion 211. Figure 5This is a schematic diagram of the bracket 6, which is located inside the housing. The bracket 6 has a square overall structure, with a through hole 61 in the center to accommodate and connect the linkage 21, allowing the linkage 21 to rotate within the through hole 61. A connecting post 62 is located near the top center of the bracket 6, and a connecting hole 63 is located on each side of the connecting post 62. Figure 6 As shown, the locking mechanism 4 includes two limiting members 41, namely a first limiting member 42 and a second limiting member 43. When the linkage member 21 is in the 0 position, the two limiting members 41 are located on both sides of the protrusion 211 to lock or unlock the protrusion 211. The first limiting member 42 and the second limiting member 43 are respectively provided with a first hinge shaft 421 and a second hinge shaft 431, which are hinged to the connecting hole 63 of the bracket 6. In this way, the protrusion 211 can be locked or unlocked by rotating the first limiting member 42 and the second limiting member 43.

[0058] To achieve locking or unlocking of the protrusion 411 by the first limiting member 42 and the second limiting member 43, such as Figure 4 As shown, the driven gear 12 has an annular body 121 on its end face near the linkage 21. The annular body 121 has four spaced and layered top blocks 1211, namely the first top block 1211a, the second top block 1211b, the third top block 1211c, and the fourth top block 1211d. (Combined with...) Figure 6-7 The first top block 1211a and the second top block 1211b are located near the second limiting member 43, and the third top block 1211c and the fourth top block 1211d are located near the first limiting member 42. Figure 8 As shown, the first top block 1211a and the third top block 1211c are located on the end face near the driven gear 12 and are on the same plane A. In use, the first top block 1211a or the third top block 1211c cooperates with the first limiting member 42, thereby lifting the first limiting member 42 and releasing the movement restriction on the linkage member 21, that is, releasing the rotation restriction on the motion conversion mechanism 2. The second top block 1211b and the fourth top block 1211d are located on the end face away from the driven gear 12 and are on the same plane B. In use, the second top block 1211b or the fourth top block 1211d cooperates with the second limiting member 43, thereby lifting the second limiting member 43 and releasing the movement restriction on the linkage member 21, that is, releasing the rotation restriction on the motion conversion mechanism 2. In the above structure, the first top block 1211a is located on the side of the second limiting member 43 (i.e., the side away from the first limiting member 42), and the fourth top block 1211d is located on the side of the first limiting member 42 (i.e., the side away from the second limiting member 43). This allows the driven gear 12 to have a large rotation range to achieve power switching.

[0059] The aforementioned top block 1211 lifts the limiting member 41, thereby releasing the movement restriction on the protrusion 211. Specifically, the bottom of the limiting member 41 spans the outer wall of the linkage member 21 and the annular body 121. More specifically, as shown... Figure 7 , Figure 9-12 As shown, the bottom of the first limiting member 42, relative to the annular body 121, is provided with a first clearance block 422 and a first clearance groove 423. The first clearance block 422 and the first clearance groove 423 are arranged sequentially from the driven gear 12 to the linkage member 21. In use, the first clearance block 422 cooperates with the first top block 1211a or the third top block 1211c. The bottom of the second limiting member 43, relative to the annular body 121, is provided with a second clearance groove 432 and a second clearance block 433. The second clearance groove 432 and the second clearance block 433 are arranged sequentially from the driven gear 12 to the linkage member 21. In use, the second clearance block 433 cooperates with the second top block 1211b or the fourth top block 1211d. During assembly, the center positions of the first clearance block 422 and the second clearance groove 432 are located on surface A, and the first clearance groove 423 and the second clearance block 433 are located on surface B. During use, when the power supply transitions from position 0 to position 1, such as Figure 13a As shown in -c, the first limiting member 42 and the second limiting member 43 lock the protrusion 211, preventing the linkage member 21 from rotating. When the driving gear 11 rotates clockwise, the driven gear 12 rotates counterclockwise. Due to the locking effect of the first limiting member 42 and the second limiting member 43, the linkage member 21 does not rotate at this time. During the rotation of the driven gear 12, the first torsion spring 5 is compressed. At the same time, the first top block 1211a rotates through the second clearance groove 432 until it reaches the first clearance block 422. During this process, since the second clearance groove 432 provides clearance for the first top block 1211a (to avoid interference), the first... The top block 1211a will not lift the second limiting member 43 to release the rotation restriction of the second limiting member 43 on the protrusion 211; when the first top block 1211a rotates to the first yielding block 422 and gradually lifts the first yielding block 422, making the first yielding block 422 higher than the protrusion 211, at this time the first limiting member 42 releases the rotation restriction on the protrusion 211, that is, releases the rotation restriction on the linkage 21. The linkage 21 rotates counterclockwise under the action of the elastic potential energy of the first torsion spring 5, thereby driving the motion conversion mechanism body 22 to rotate until the power supply is in position I (the state diagram when the power supply is in position I is shown in the figure). Figure 14a-c (as shown). Similarly, when the power supply changes from position 0 to position II, the process is as follows: the driving gear 11 rotates counterclockwise, and the driven gear 12 rotates clockwise. During the rotation, the first torsion spring 5 is compressed. At the same time, the fourth top block 1211d rotates through the first clearance groove 423 until it reaches the second clearance block 433. When the fourth top block 1211d rotates to the second clearance block 433 and gradually lifts the second clearance block 433, making the second clearance block 433 higher than the protrusion 211, the second limiting member 43 releases the rotation restriction on the protrusion 211, that is, releases the rotation restriction on the linkage member 21. The linkage member 21 rotates clockwise under the action of the elastic potential energy of the first torsion spring, thereby driving the transmission disk and the indicator wheel to rotate until the power supply is in position II (the state diagram when the power supply is in position II is shown in the figure). Figure 15a -c is shown).

[0060] like Figure 7 As shown, the connecting post 62 is provided with an elastic reset member 44 that causes the first limiting member 42 and the second limiting member 43 to tend towards the locking protrusion 211. The elastic reset member 44 is a second torsion spring. Figure 16 As shown, a limiting groove 212 is provided on each side of the outer wall of the linkage 21, located on both sides of the protrusion 211. These are the first limiting groove 212a and the second limiting groove 212b, respectively. The first limiting groove 212a and the second limiting groove 212b are symmetrically arranged about the protrusion 211. Figure 9-12 As shown, the first clearance groove 423 extends towards the side of the linkage 21 with a first limiting block 424 adapted to the first limiting groove 212a, and the second clearance block 433 extends towards the side of the linkage 21 with a second limiting block 434 adapted to the second limiting groove 212b. During the process of the power supply rotating from position 0 to position 1, when the first limiting member 42 releases its restriction on the protrusion 211, the linkage 21 rotates counterclockwise under the action of the first torsion spring 5. During the rotation of the linkage 21, the first limiting member 42 and the second limiting member 43 abut against the outer periphery of the linkage 21 under the action of the elastic reset member 44. After the linkage 21 rotates a certain angle, the second limiting block 434 is engaged in the second limiting groove 212b, thereby stopping the rotation of the linkage 21 (see the state diagram). Figure 14bWhen the power supply is restored from position 1 to position 0, the driving gear 11 rotates clockwise and the driven gear 12 rotates counterclockwise. During the rotation, the first torsion spring 5 is compressed. At the same time, the second top block 1211b rotates through the first clearance groove 423 until it reaches the second clearance block 433. When the second top block 1211b rotates to the second clearance block 433 and gradually lifts the second clearance block 433, the second limiting block 434 is higher than the second limiting groove 212b. At this time, the second limiting block 434 releases the rotation restriction on the second limiting groove 212b, that is, the second limiting member 43 releases the rotation restriction on the linkage member 21. The linkage member 21 rotates counterclockwise under the action of the elastic potential energy of the first torsion spring 5 until the protrusion 211 is locked between the first limiting member 42 and the second limiting member 43. Similarly, as the power supply rotates from position 0 to position II, the second limiting member 43 releases its restriction on the protrusion 211, thereby causing the linkage member 21 to rotate until the first limiting block 424 is engaged in the first limiting groove 212a (see the state diagram). Figure 15b When the power supply rotates from position II to position 0, the third top block 1211c on the driven gear rotates through the second clearance groove 432 until it reaches the second clearance block 433. When the third top block 1211c rotates to the first clearance block 422 and gradually lifts the first clearance block 422, the first limiting block 424 is higher than the first limiting groove 212a. At this time, the first limiting block 424 releases the rotation restriction on the first limiting groove 212a, that is, the first limiting member 42 releases the rotation restriction on the linkage member 21. The linkage member 21 rotates clockwise under the action of the elastic potential energy of the first torsion spring until the protrusion 211 is locked between the first limiting member 42 and the second limiting member 43.

[0061] Example 2

[0062] Compared to Example 1, the difference between this example and Example 1 is that this example provides a structure that can automatically switch power supplies, based on Example 1.

[0063] like Figure 9-12 As shown, the first limiting member 42 extends horizontally with a first trigger rod 425 in a direction away from the protrusion 211, and the second limiting member 43 extends with a second trigger rod 435 in a direction away from the protrusion 211. The second trigger rod 435 is inclined at an upper outer position. Additionally, the housing includes a top cover (not shown), which has a pressing block (not shown) for pressing the first trigger rod 425 and the second trigger rod 435. When the top cover is closed, the pressing block presses the first trigger rod 425 and the second trigger rod 435, thereby releasing the first and second limiting members from restricting the rotation of the linkage member 21. That is, after the top cover is closed, the limiting members are always in an unlocked state, and the motion conversion mechanism can rotate under the action of the automatic drive mechanism.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dual power transfer switch with a locking mechanism, comprising: a manual driving mechanism including a first rotating member, the first rotating member having an axial hole in a middle position thereof, the first rotating member being configured to rotate around the axial hole under an external force, and the first rotating member having an annular body coaxially arranged on an end face thereof, the annular body having a first top block and a fourth top block; a motion conversion mechanism including a linkage member, the linkage member having a first rotating shaft connected with the axial hole, and the linkage member having a protrusion on an outer side wall thereof; a locking mechanism including a first limiting member and a second limiting member, the first limiting member and the second limiting member being configured to lock the protrusion; a first torsion spring arranged between the first rotating member and the linkage member, the first torsion spring being configured to store energy under rotation of the first rotating member in a locked state of the dual power transfer switch, and the first torsion spring being configured to release the stored energy to drive the linkage member to move in a same direction as the first rotating member after the protrusion is unlocked; characterized in that: the first top block and the fourth top block are arranged in layers in a forward and backward direction along the axial hole; the first limiting member has a first clearance groove arranged in a same layer as the fourth top block at a bottom thereof, and the second limiting member has a second clearance groove arranged in a same layer as the first top block at a bottom thereof, in the locked state, end faces of the first limiting member and the second limiting member abut against left and right sides of the protrusion, respectively; in the locked state, the first top block is driven to rotate by the first rotating member in a clockwise direction, and the first top block is configured to rotate to push the second limiting member out of a top face of the protrusion to release a rotation restriction of the linkage member in the clockwise direction, or the fourth top block is driven to rotate by the first rotating member in an anticlockwise direction, and the fourth top block is configured to rotate to push the second limiting member out of the top face of the protrusion to release a rotation restriction of the linkage member in the anticlockwise direction, and in the rotating process, the first top block avoids the second limiting member through the second clearance groove, and the fourth top block avoids the first limiting member through the first clearance groove.

2. The dual power transfer switch of claim 1, wherein: the outer side wall of the linkage member and located at both sides of the protrusion has a first limiting groove and a second limiting groove, respectively, the first limiting groove is matched with the first limiting member, and the second limiting groove is matched with the second limiting member.

3. The dual power transfer switch of claim 2, wherein: the bottom of the first limiting member has a first limiting block matched with the first limiting groove, and the bottom of the second limiting member has a second limiting block matched with the second limiting groove; the first limiting groove and the first limiting block are configured to lock the rotation of the linkage member in the clockwise direction, and the second limiting groove and the second limiting block are configured to lock the rotation of the linkage member in the anticlockwise direction.

4. The dual power transfer switch of claim 3, wherein: the first top block and the fourth top block have a second top block and a third top block arranged in layers in a forward and backward direction along the axial hole; the first top block and the third top block are arranged in a same layer, and the second top block and the fourth top block are arranged in a same layer; after locking the anticlockwise rotation of the linkage member, the first rotating member is reversely rotated to enable the second top block to rotate to push the second limiting member out of the second limiting groove, thereby releasing the rotation restriction of the linkage member in the clockwise direction; or after locking the clockwise rotation of the linkage member, the first rotating member is reversely rotated to enable the third top block to rotate to push the first limiting member out of the first limiting groove, thereby releasing the rotation restriction of the linkage member in the anticlockwise direction.

5. The dual power transfer switch of claim 4, wherein: The first top block and the fourth top block, and the second top block and the third top block are symmetrically arranged about the protrusion in a radial cross-section projection of the linkage.

6. The dual power transfer switch of claim 4, wherein: The bottom of the first limiting piece is provided with a first clearance block arranged in the same layer as the first top block and the third top block, and the first clearance block is used to release the locking of the linkage by the first limiting piece when the first top block or the third top block rotates to the bottom thereof; the bottom of the second limiting piece is provided with a second clearance block arranged in the same layer as the second top block and the fourth top block, and the second clearance block is used to release the locking of the linkage by the second limiting piece when the second top block or the fourth top block rotates to the bottom thereof.

7. The dual power transfer switch of claim 2, wherein: The first limiting groove and the second limiting groove are symmetrically arranged relative to the protrusion.

8. The dual power transfer switch of claim 1, wherein: The first rotating piece is provided with a positioning plate relative to the end surface of the linkage, and the end surface of the positioning plate abuts against the end surface of the first rotating piece.

9. The dual power transfer switch according to any one of claims 1-8, characterized in that: The bracket is provided with a connecting hole, the first limiting piece and the second limiting piece are each provided with a hinge shaft hinged with the corresponding connecting hole, and the hinge shaft extends in a direction away from the protrusion and has a trigger rod.

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