A manual switching mechanism of a dual power transfer switch

Abstract

The utility model discloses a manual opening and closing mechanism of double power transfer switch, the iron core of its coil and connecting rod group link, when the coil energization drive the movement of connecting rod group, connecting rod group includes first swing frame, and first swing frame is rotatable through the axle structure and set up on the support, and the iron core horizontal setting is a drive shaft, and first swing frame sets up in the drive shaft place through a first waist type hole and further forms the linkage of structure, and the rotatable pressure frame of first swing frame is correspondingly provided with to the drive shaft, and the pressure frame is pressed to the drive shaft when swinging by external force, and further drives the drive shaft activity, and the drive shaft drives first swing frame activity, and when the drive shaft activity distance exceeds the outer end of pressure frame structure, the pressure frame continues to swing and separates from the drive shaft, and the drive shaft resets and drives first swing frame reset. The utility model manual's operation opening and closing will not influence the reset action of connecting rod group because of the fast and slow of hand speed, and further guarantees that the operation opening and closing of manual can be more quick, more reliable, more labor saving.

Description

Technical Field

[0001] This utility model relates to the field of electrical switches, and in particular to a manual opening and closing mechanism for a dual power supply transfer switch. Background Technology

[0002] Traditional dual-power transfer switches have two circuits: a primary circuit and a backup circuit. An operating mechanism is connected to the input shaft. The operating mechanism uses two sets of electromagnetic coils (primary and backup) to drive a rotating shaft, which closes and opens the two circuits. Alternatively, manual switching can be performed via a handle. The rotating shaft connects to the output shafts of the primary and backup sides via a circuit breaker assembly. The output shafts connect to specific moving contacts to open and close the circuit with the stationary contacts. Using a single coil in conjunction with a linkage structure for closing and opening—meaning the coil closes the circuit with a single energization and opens it with a second energization—reduces the rigid requirement of two coils. However, in different operating conditions—manual control and coil-electric control—manually driving the linkage restricts the movement of the coil's iron core. This human restriction hinders the rapid operation of the linkage, thus affecting closing efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a manual closing mechanism for a dual-power transfer switch. The iron core is driven by the pressure frame, and the iron core can be quickly reset after the two are displaced and separated. This can then drive the linkage group linked to the iron core to reset more quickly and complete the closing action, making the manual closing action highly efficient.

[0004] This utility model adopts the following technical solution: a manual opening and closing mechanism for a dual-power transfer switch, including a bracket, a coil and a linkage group installed in the bracket, the linkage group being movably configured, the iron core of the coil being linked with the linkage group, the coil being energized to drive the extension and retraction of the iron core, thereby driving the movement of the linkage group; the linkage group includes a first swing frame, the first swing frame being rotatably mounted on the bracket via a shaft structure, a drive shaft being horizontally mounted on the iron core, the first swing frame being sleeved on the drive shaft through a first oblong hole to form a linkage structure; a rotatable pressure frame is provided at the first swing frame corresponding to the drive shaft; when the pressure frame is driven to swing by an external force, it presses against the drive shaft, thereby driving the drive shaft to move, the drive shaft driving the first swing frame to move, when the drive shaft moves beyond the outer end of the pressure frame structure, the pressure frame continues to swing and disengage from the drive shaft, while the drive shaft resets and drives the first swing frame to reset.

[0005] As an improvement, the pressure frame includes an operating frame and a pressure block. The operating frame is rotatably mounted on the first swing frame, and the pressure block is rotatably mounted on the operating frame. The rear side of the pressure block abuts against the operating frame to restrict rotation. When the pressure block swings with the operating frame and presses against the drive shaft, the pressure block is limited by the operating frame at the rear. When the drive shaft resets first, and the pressure block swings back to reset with the operating frame, the pressure block contacts the drive shaft and rotates past the drive shaft.

[0006] As an improvement, the pressure block is connected to a torsion spring, which uses its elasticity to press the pressure block against the operating frame; when the pressure block rotates, the torsion spring stores force.

[0007] As an improvement, the pressure blocks are set into two sets that are symmetrical on the left and right, and the two sets of pressure blocks cooperate with the drive shaft at symmetrical positions on both sides.

[0008] As an improvement, the front contact surface of the pressure block opposite to the drive shaft is set as a plane, and the rear contact surface opposite to the drive shaft is set as an inclined plane.

[0009] As an improvement, the operating frame is provided with a socket, and an operating wrench is detachably installed at the socket.

[0010] The beneficial effects of this utility model are as follows: During manual operation, the operator can drive the pressure frame to resist the movement of the drive shaft, thereby synchronously driving the movement of the entire linkage assembly to complete the locking or unlocking action of the linkage assembly structure; after the pressure frame swings to disengage from the drive shaft, the drive shaft and iron core are no longer restricted and can quickly reset. This reset action drives the linkage assembly to complete a rapid action, thereby enabling the entire circuit to close quickly. The pressure frame, which is limited by the operator, is in a free rotation state. The structure of this utility model will not affect the reset action of the linkage assembly due to the speed of the operator's hand, thus ensuring that the manual opening and closing operation is faster, more reliable, and less strenuous. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention during circuit breaker tripping. Figure 1 .

[0012] Figure 2 This is a three-dimensional structural diagram of the present invention during circuit breaker tripping. Figure 2 .

[0013] Figure 3 This is a three-dimensional structural diagram of the hidden support when the circuit breaker is tripped.

[0014] Figure 4 This is a three-dimensional structural diagram of the present invention when the switch is closed on one side.

[0015] Figure 5 This is a three-dimensional structural diagram of the present invention after the support is hidden when the circuit is closed on one side.

[0016] Figure 6 This is a three-dimensional structural diagram of the present invention when the circuit is closed on the other side.

[0017] Figure 7 This is a three-dimensional structural diagram of the present invention after the bracket is hidden when the circuit is closed on the other side.

[0018] Figure 8 for Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 , 2 Figures 3, 4, 5, 6, 7, and 8 show specific embodiments of the manual opening and closing mechanism of the dual-power transfer switch of this utility model. This embodiment includes a bracket 1, a coil 2 installed in the bracket 1, and a connecting rod assembly 3. The connecting rod assembly 3 is movably configured. The iron core 21 of the coil 2 is linked with the connecting rod assembly 3. When the coil 2 is energized, it drives the extension and retraction of the iron core 21, thereby driving the movement of the connecting rod assembly 3. The connecting rod assembly 3 includes a first swing frame 31, which is rotatably mounted on the bracket 1 via a shaft structure. A drive shaft 22 is horizontally mounted on the iron core 21. The first swing frame 31 is fitted onto the drive shaft 22 through a first waist-shaped hole 33, thereby forming a linkage of the structure. A rotatable pressure frame 311 is provided at the first swing frame 31 corresponding to the drive shaft 22. When the pressure frame 311 is driven to swing by an external force, it presses against the drive shaft 22, thereby driving the drive shaft 22 to move. The drive shaft 22 drives the first swing frame 31 to move. When the movement distance of the drive shaft 22 exceeds the outer end of the pressure frame 311 structure, the pressure frame 311 continues to swing and disengages from the drive shaft 22, while the drive shaft 22 resets, driving the first swing frame 31 to reset.

[0021] In a specific implementation of the opening and closing mechanism of the dual power supply changeover switch of this utility model, the linkage group 3 further includes a second swing frame 32. The second swing frame 32 is rotatably mounted on the support 1 via a shaft structure. The second swing frame 32 is sleeved on the drive shaft 22 through the first waist-shaped hole 33, thereby forming a linkage of the structure. The second swing frame 32 is U-shaped in general. On the support 1, corresponding to the two sides of the second swing frame 32, a locking frame 4 is also provided. The locking frame 4 is externally connected to a tension spring. The locking frame 4 includes a second waist-shaped hole 41, a limiting hole 42, a retaining wall 43, and an abutting wall 44. The second waist-shaped hole 41 is sleeved on the first fixed hole 22 on the support 1. At shaft 11, the locking frame 4 is thus given a first degree of freedom to move back and forth along the second waist-shaped hole 41 with the first fixed shaft 11 radially as a reference, and a second degree of freedom to move along the first fixed shaft 11 axially as a reference. The limiting hole 42 is sleeved on the second fixed shaft 12 on the bracket 1, and the limiting hole 42 has space for the second fixed shaft 12 to move in the first degree of freedom. The space includes a short space 421 with a shorter size and a long space 422 with a longer size. The front and rear positions of the second swing frame 32 are respectively provided with a locking hook 321 and a push plate 322 that cooperate with the card wall 43 and the abutting wall 44.

[0022] When the second swing frame 32 moves to the first stopping position, the push plate 322 abuts against the contact wall 44 and pushes the locking frame 4 to move to the first stopping position in the first degree of freedom. At this time, the second fixed axis 12 moves from the long space 422 to the short space 421 and is locked at the end of the short space 421 to form the stopping limit of the locking frame 4. The tension spring is stretched and stored. The first stopping position is the closed position of the dual power supply conversion switch.

[0023] When the coil 2 is energized and drives the iron core 21 to move, the second swing frame 32 moves to the second stopping position. During this process, the locking hook 321 abuts against the inner wall of the locking frame 4 from the inside and pushes the locking frame 4 to move in the second degree of freedom. When the locking hook 321 passes the locking frame 4 and the coil 2 is de-energized to reset the second swing frame 32, the locking hook 321 hooks onto the wall 43 and abuts against the second fixed shaft 12 to enter the long space 422. The locking frame 4 and the second swing frame 32 stop at the second stopping position. The second stopping position is the open position of the dual power supply conversion switch.

[0024] When the coil 2 is energized again to drive the iron core 21 to move, the second swing frame 32 moves to cause the locking hook 321 to disengage from the retaining wall 43, the locking frame 4 is released by the tension spring to reset, and when the coil 2 is de-energized, the second swing frame 32 resets and drives the locking frame 4 to move to the first stopping position.

[0025] The first swing frame 31 is externally connected to the adjustment shaft 5. The support 1 is provided with an adjustment slot 6. The adjustment shaft 5 is accommodated in the adjustment slot 6 and moves within it. The adjustment slot 6 includes a middle open position 61 and a main closing position 62 and an auxiliary closing position 63 on both sides. It also includes a movable guide block 7 corresponding to the adjustment shaft 5 and the adjustment slot 6. The guide block 7 can be adjusted to the main closing position 62 or the auxiliary closing position 63 of the adjustment slot 6 to block the adjustment shaft 5 from entering the blocking side and guide it to the other side.

[0026] The following description of the structural action is provided in conjunction with the accompanying drawings. Figure 1 , 2 As shown in Figure 3, the open position of the dual power supply transfer switch is the position where the locking frame 4 and the second swing frame 32 stop at the second stopping position shown in the figure. The locking hook 321 is locked at the wall 43, the second fixed shaft 12 is located at the long space 422, and the tension spring is stretched, causing the locking frame 4 to tend to reset to the left.

[0027] When closing the circuit breaker, Figure 4 , 5 As shown in Figures 6 and 7, when coil 2 is energized, the iron core 21 descends. The drive shaft 22 descends, causing the second swing frame 32 to swing. After the locking hook 321 descends, it releases the limit on the jamming wall 43, thereby releasing the locking frame 4. The locking frame 4 moves to the left by the restoring force of the tension spring until the second fixed shaft 12 abuts against the end of the long space 422 for limitation. Afterwards, when coil 2 is de-energized, the iron core 21 can be reset upward by the elastic element sleeved on it, thereby causing the second swing frame 32 and the first swing frame 31 to move to the first stopping position, which is the closing position. During this movement, the first swing frame 31 drives the debugging shaft 5 from the opening position 61 of the debugging slot 6 to the main closing position. Position 62 or secondary closing position 63, thus completing the action; the second swing frame 32 swings back, and since the locking frame 4 has moved to the left, it will not interfere with the locking hook 321. During the continuous swinging of the second swing frame 32, the push plate 322 on the other side pushes the locking frame 4 to the right again after contacting the abutting wall 44 of the locking frame 4, thereby causing the second fixed shaft 12 to move to the left along the long space 422 until it reaches the right end of the short space 421. The locking frame 4 will rotate, causing the second fixed shaft 12 to fall into the short space 421 and abut against the right end to form the structural limit of the locking frame 4. During this process, the tension spring is stretched and stored, and the locking frame 4 and the second swing frame 32 stop at the first stopping position.

[0028] When the circuit breaker is tripped, coil 2 is energized, causing iron core 21 to descend. Lock hook 321 swings downwards with the second swing frame 32, pushing outwards to open locking bracket 4. After lock hook 321 passes locking bracket 4, coil 2 is de-energized, iron core 21 returns to its upward position, and the second swing frame 32, upon returning to its upward position, contacts locking bracket 4. The upward movement of locking bracket 4 causes the second fixed shaft 12 to disengage from short space 421 and enter long space 422. Lock hook 321 hooks onto the retaining wall 43, thus limiting locking bracket 4 and preventing it from moving to the left. The first swing frame 31 moves to the second stopping position, and the adjusting shaft 5 returns to the tripped position 61.

[0029] The above-described action process is achieved by a set of coils 2 and iron cores 21. Compared with the traditional method of using two sets of mechanical structures in conjunction with two sets of coils to complete the switching of two circuits, this method can greatly reduce component costs and the volume occupied by the mechanical structure. By using a U-shaped second swing frame 32 in conjunction with the locking frames 4 on both sides for structural locking on both sides, it can ensure that the force on the components is uniform and stable, and avoid failures caused by local or unilateral wear of the transmission structure during long-term use.

[0030] On the other hand, the switching between the normal and standby switches is achieved through the following structure: When opening, the test shaft 5 moves from the main closing position 62 or the auxiliary closing position 63 of the test slot 6 to the opening position 61; when closing, the test shaft 5 moves from the opening position 61 of the test slot 6 to the main closing position 62 or the auxiliary closing position 63. A guide block 7 is provided, which blocks the test shaft 5 at the main closing position 62 or the auxiliary closing position 63, thereby causing the test shaft 5 to move to the other side, either the auxiliary closing position 63 or the main closing position 62. When switching between the normal and standby switches is required, the position of the guide block 7 is adjusted. After adjustment, the guide block 7 can move to the unblocked side. Figure 1-5 For example, guide block 7 blocks the auxiliary closing position 63. If closing is performed at this time, the debugging shaft 5 will move towards the main closing position 62, and then... Figure 4 , 5 The circuit is closed as shown; if guide block 7 blocks the main closing position 62, then the adjustment shaft 5 will move to the auxiliary closing position 63, and so on. Figure 6 , 7The diagram shows the backup circuit being closed. The power output mechanism corresponding to the test shaft 5 is connected to an external swing arm 9. When the test shaft 5 is in the main closing position 62 or the auxiliary closing position 63, the swing arm 9 swings left or right, thereby driving the output shaft 91 to complete the left or right rotation. The output shaft 91 is connected to an external moving contact. The left or right rotation causes the moving contact to make contact with the corresponding normal side stationary contact or the backup side stationary contact to complete the closing. By adjusting the movement trajectory of the test shaft 5 through the guide block 7, the switching between the two circuits can be realized, which can greatly simplify the power input and output mechanism, greatly simplify the component structure, and reduce the volume occupied by the mechanism while controlling costs.

[0031] Regarding the innovation of this utility model, such as Figure 1 , 8 As shown, during manual closing, the first swing frame 31, the second swing frame 32, and the drive shaft 22 are linked. Through the setting of the pressure frame 311, during manual swinging, the pressure frame 311 can press down against and press down on the drive shaft 22, thereby driving the iron core 21 to move downwards. Simultaneously, the drive shaft 22 will abut against the first oblong hole 33, thus driving the movement of the first swing frame 31 and the second swing frame 32. When the structure moves to the point where the second swing frame 32 and the locking frame 4 are locked or unlocked, the downward displacement of the drive shaft 22 exceeds the swing radius of the pressure frame 311, causing the pressure frame 311 to swing away from the drive shaft 22. With the iron core 21 no longer restricted, it can be quickly reset by relying on the elastic element on the iron core 21. The reset action of the drive shaft 22 and the iron core 21 synchronously drives the first swing frame 31 and the second swing frame 32 to perform a return action, thereby completing the rapid closing action. The operator operates the pressure frame 311 by hand. The pressure frame 311 is rotatably set at the first swing frame 31 through the shaft structure. It is in a free rotation state and will not affect the reset action of the entire linkage group 3. The manual operation of opening and closing the circuit will not affect the reset action of the linkage group due to the speed of hand, thereby ensuring that the manual opening and closing operation is faster, more reliable and less labor-intensive.

[0032] As an improved specific implementation, the pressure frame 311 includes an operating frame 3111 and a pressure block 3112. The operating frame 3111 is rotatably disposed at the first swing frame 31, and the pressure block 3112 is rotatably disposed on the operating frame 3111. The rear side of the pressure block 3112 abuts against the operating frame 3111 to restrict rotation. When the pressure block 3112 swings with the operating frame 3111 and presses against the drive shaft 22, the pressure block 3112 is limited by the operating frame 3111 at the rear side. When the drive shaft 22 resets first, and the pressure block 3112 swings back to reset with the operating frame 3111, the pressure block 3112 contacts the drive shaft 22 and rotates past the drive shaft 22.

[0033] like Figure 8As shown, the operating frame 3111 is structurally designed for connection with the operating wrench 314. The pressure block 3112 is rotatably mounted on one side of the operating frame 3111, and its rotation direction is limited at the rear by the structure of the operating frame 3111, thus causing the pressure block 3112 to abut against the rear limit of the operating frame 3111. When the operating frame 3111 and the pressure block 3112 swing towards the drive shaft 22 and come into contact, the pressure block 3112 can actually contact the drive shaft 22 and press down. After the pressure block 3112 rotates past the descending drive shaft 22, the drive shaft 22 quickly returns to its original position, achieving a rapid reset of the linkage assembly 3. When the operating frame 3111 and the pressure block 3112 reset, the pressure block 3112 can rotate around the drive shaft 22 when it reaches it, allowing the pressure block 3112 and the operating frame 3111 to return to their original positions above the drive shaft 22 for subsequent manual operation.

[0034] As an improved specific implementation, the pressure block 3112 is connected to a torsion spring 312, which uses its elasticity to press the pressure block 3112 against the operating frame 3111; when the pressure block 3112 rotates, the torsion spring 312 stores force.

[0035] like Figure 8 As shown, by setting the torsion spring 312, the stopping position of the pressure block 3112 can be limited, that is, it abuts against the operating frame 3111. When the pressure block 3112 abuts against the drive shaft 22 from below and rotates past the drive shaft 22, the torsion spring 312 is twisted and stores force. After the pressure block 3112 gets out of the limit of the drive shaft 22, the elastic force of the torsion spring 312 can be released to make the pressure block 3112 return to the position of abutting against the operating frame 3111, maintaining the stability of the stopping position, so that it can be used for the next manual operation.

[0036] As an improved specific implementation, the pressure block 3112 is configured as two sets symmetrically arranged on the left and right, and the two sets of pressure blocks 3112 cooperate with the drive shaft 22 at symmetrical positions on both sides.

[0037] like Figure 8 As shown, by setting symmetrical pressure blocks 3112 on both sides, the force on both sides can be evenly matched when the drive shaft 22 is in contact, avoiding wear or tilting caused by local or unilateral force on the mating structure during long-term use, which could lead to failure.

[0038] As an improved specific implementation, the front contact surface of the pressure block 3112 opposite to the drive shaft 22 is set as a plane 3113, and the rear contact surface opposite to the drive shaft 22 is set as an inclined plane 3114.

[0039] like Figure 8As shown, the front contact surface is the surface that abuts against the drive shaft 22 during descent, and is thus set as a plane 3113. During the continuous descent of the pressure block 3112 and the drive shaft 22, the flat plane 3113 presses against the circular surface of the drive shaft 22 for engagement and relative displacement and rotation. The rear contact surface is the contact surface that needs to be quickly rotated around the drive shaft 22. It is set as an inclined plane 3114, which allows the pressure block 3112 to quickly bypass the interference position with the drive shaft 22 during rotation, thereby reducing the contact distance between the pressure block 3112 and the drive shaft 22 and improving the reset efficiency of the pressure block 3112.

[0040] As an improved specific implementation, the operating frame 3111 is provided with a socket 313, and an operating wrench 314 is detachably provided at the socket 313.

[0041] like Figure 8 As shown, in specific implementation, the housing of the dual power transfer switch (not shown in the figure) has a hole structure corresponding to the socket 313. The operator inserts the operating wrench 314 into the socket 313, and then the operating frame 3111 can be swung around the axis by the operating wrench 314 to manually open and close the circuit.

[0042] As an improved specific implementation, the inner side of the locking frame 4 is provided with an arc-shaped inner wall 45 that contacts and cooperates with the locking hook 321.

[0043] like Figure 3 , 5 As shown in Figure 7, the arc-shaped inner wall 45 corresponds to the position where the locking hook 321 abuts, providing a gentler abutting arc surface. The corresponding abutting surface of the locking hook 321 is also set as an arc surface, reducing hard collision wear when the locking hook 321 moves downward to open the locking bracket 4, thus extending the service life of the component.

[0044] As an improved specific implementation, the second swing frame 32 is externally connected to a tension spring, which is stretched to store force when the second swing frame 32 moves from the first stopping position to the second stopping position.

[0045] like Figure 1 , 4 As shown in Figure 6, a tension spring is used to provide restoring force for the second swing frame 32. When the second swing frame 32 is driven to swing by the coil 2, the tension spring is stretched. After the coil 2 is de-energized, the restoring force of the tension spring can be used to quickly reset the second swing frame 32 to the first stopping position, thereby ensuring the stability of the closing position and driving the locking frame 4 to move to the first stopping position.

[0046] As an improved specific implementation, the debugging slot 6 is in the shape of an inverted "Y". The open position 61 is located in the middle upper part, and the main closing position 62 and the auxiliary closing position 63 are located on both sides of the lower part. The guide block 7 moves to the side of the main closing position 62 or the auxiliary closing position 63 at the intersection of the "Y" shape to block.

[0047] like Figure 1 , 2 As shown in Figures 4 and 6, the specific debugging slot 6 forms a middle upper part with a tripped position 61, and two lower parts with main closing positions 62 and auxiliary closing positions 63. The main closing positions 62 and auxiliary closing positions 63 are symmetrically arranged. When the debugging shaft 5 falls and is guided by the guide block 7 to a closing position on one side, the position of the debugging shaft 5 can be kept stable. When the debugging shaft 5 moves to the tripped position 61, the left and right positions of the guide block 7 can be adjusted. The guide block 7 blocks the debugging shaft 5 on one side at the intersection of the "Y" shape and guides it to the other side, which can ensure the smooth movement trajectory of the debugging shaft 5.

[0048] As an improved specific implementation, the guide block 7 is rotatably mounted on the bracket 1 via a pivot.

[0049] like Figure 1-7 As shown, the rotating shaft is positioned slightly below the central axis of the debugging slot 6, allowing the guide block 7 to swing left and right to adjust its position during rotation, thus completing the switching operation at the intersection of the debugging slot 6.

[0050] As an improved specific implementation, one end of the guide block 7 that extends into the intersection of the debugging slot 6 is set as a "V"-shaped guide wall 71. When the guide block 7 blocks the debugging shaft 5 from entering the main closing position 62 or the auxiliary closing position 63 on one side, the "V"-shaped guide wall 71 guides the debugging shaft 5 to move to the other side.

[0051] like Figure 1-5 As shown, when the "V"-shaped guide wall 31 is located at the main closing position 62 or the auxiliary closing position 63, it can effectively block the entry of the debugging shaft 5 by relying on one side of the inclined surface, and the inclined surface and the groove wall on the other side form a continuous guide surface, which can guide the debugging shaft 5 to move smoothly to the other side to complete the closing.

[0052] As an improved specific implementation, the guide block 7 is driven by a small coil 8 to adjust its position.

[0053] like Figure 3 , 5As shown in Figure 7, preferably, the position of the guide block 7 can be adjusted by setting a small coil 8, and then the circuit of the dual power supply transfer switch can be used to automatically switch the normal side and the standby side circuit. The size of the small coil 8 is relative to the coil 2 that controls the opening and closing of the circuit breaker. Since there are many components to be driven, such as the input components, such as the linkage group 3, the adjustment shaft 5, and the output components, such as the swing arm 9, the output shaft 91, and the moving contact, a larger coil 2 is used for electromagnetic drive to open and close the circuit breaker. The guide block 7 itself does not have any extra linkage components, so the smaller and more cost-effective small coil 8 can be used. Compared with the traditional structure, it also has better cost and volume advantages.

[0054] As an improved specific implementation, the small iron core 81 of the small coil 8 is connected to a test piece 82, and the guide block 7 is provided with a toggle arm 72. The test piece 82 and the toggle arm 72 are engaged and linked together.

[0055] like Figure 1-7 As shown, the adjustment piece 82 and the toggle arm 72, through their structural cooperation, cause the small iron core 81 to move up or down when the small coil 8 is energized or de-energized. This, in turn, drives the adjustment piece 82 to adjust the up-down movement of the toggle arm 72, thereby achieving the left-right position adjustment of the guide block 7. Preferably, the adjustment piece 82 or the toggle arm 72 can also be extended beyond the bracket 1, making it convenient for operators to use tools to move the adjustment piece 82 or the toggle arm 72, thereby performing manual switching of the main and auxiliary circuits.

[0056] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A manual opening and closing mechanism for a dual-power transfer switch, comprising a bracket (1), a coil (2) mounted in the bracket (1), and a linkage group (3), wherein the linkage group (3) is movably configured, and the iron core (21) of the coil (2) is linked with the linkage group (3), driving the extension and retraction of the iron core (21) when the coil (2) is energized, thereby driving the movement of the linkage group (3); characterized in that: The linkage assembly (3) includes a first swing frame (31), which is rotatably mounted on the support (1) via a shaft structure. A drive shaft (22) is horizontally mounted on the iron core (21). The first swing frame (31) is sleeved on the drive shaft (22) through a first waist-shaped hole (33) to form a linkage of the structure. A rotatable pressure frame (311) is provided at the first swing frame (31) corresponding to the drive shaft (22). When the pressure frame (311) is driven to swing by an external force, it presses against the drive shaft (22), thereby driving the drive shaft (22) to move. The drive shaft (22) drives the first swing frame (31) to move. When the movement distance of the drive shaft (22) exceeds the outer end of the pressure frame (311) structure, the pressure frame (311) continues to swing away from the drive shaft (22), and the drive shaft (22) resets, driving the first swing frame (31) to reset.

2. The manual opening and closing mechanism of a dual-power transfer switch according to claim 1, characterized in that: The pressure frame (311) includes an operating frame (3111) and a pressure block (3112). The operating frame (3111) is rotatably mounted on the first swing frame (31), and the pressure block (3112) is rotatably mounted on the operating frame (3111). The rear side of the pressure block (3112) abuts against the operating frame (3111) to restrict rotation. When the pressure block (3112) swings with the operating frame (3111) and presses against the drive shaft (22), the pressure block (3112) is limited by the operating frame (3111) at the rear. When the drive shaft (22) resets first, and the pressure block (3112) swings back and resets with the operating frame (3111), the pressure block (3112) contacts the drive shaft (22) and rotates past the drive shaft (22).

3. The manual opening and closing mechanism of a dual-power transfer switch according to claim 2, characterized in that: The pressure block (3112) is connected to a torsion spring (312), which uses its elasticity to press the pressure block (3112) against the operating frame (3111); when the pressure block (3112) rotates, the torsion spring (312) stores force.

4. The manual opening and closing mechanism of a dual-power transfer switch according to claim 2 or 3, characterized in that: The pressure block (3112) is configured as two sets symmetrically arranged on the left and right, and the two sets of pressure blocks (3112) cooperate with the drive shaft (22) at symmetrical positions on both sides.

5. The manual opening and closing mechanism of a dual-power transfer switch according to claim 2 or 3, characterized in that: The front contact surface of the pressure block (3112) opposite to the drive shaft (22) is set as a plane (3113), and the rear contact surface opposite to the drive shaft (22) is set as an inclined plane (3114).

6. The manual opening and closing mechanism of a dual-power transfer switch according to claim 2 or 3, characterized in that: The operating frame (3111) is provided with a socket (313), and an operating wrench (314) is detachably installed at the socket (313).

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