A moving-displacement circuit breaker manual closing holding device and circuit breaker

Abstract

The application provides a kind of shift circuit breaker manual closing holding device and circuit breaker, and belongs to the technical field of shift circuit breaker manual closing, comprising: the rotation of closing holding cam is driven by shaft assembly, the contact of closing holding cam and the lower link mechanism is realized by closing holding cam, the downward pressure of link mechanism is realized by the rotation of closing holding cam, the downward movement of link mechanism is realized simultaneously, the closing action of circuit breaker is realized, and the closing of circuit breaker is realized;The contact of link mechanism and the holding section of closing holding cam is realized after link mechanism reaches the closing point on closing holding cam, the position of link mechanism is kept unchanged in a period of time after closing by the design of holding section, the circuit breaker enters magnetic holding stage and reaches a certain closing holding time, the internal arc of circuit breaker vacuum tube caused by the action of link mechanism in a short time after closing is prevented, and the holding stage is added in the manual closing of circuit breaker by the setting of holding section, to ensure the stable closing of circuit breaker.

Description

Technical Field

[0001] This application belongs to the field of manual closing technology for mobile circuit breakers, specifically relating to a manual closing holding device and a circuit breaker for mobile circuit breakers. Background Technology

[0002] Currently, the closing and opening of the circuit breaker of the mobile transformer is achieved by controlling the permanent magnet closing mechanism through a permanent magnet controller. Once the permanent magnet controller fails, the circuit breaker cannot close, and the only solution is to replace the permanent magnet controller. However, it is not easy to determine the damage to the permanent magnet controller, and it takes a long time to determine the damage and replace the permanent magnet controller. This causes the equipment supplied by the mobile transformer to malfunction, seriously affecting production and even bringing great safety hazards.

[0003] To address the problem of circuit breakers failing to close due to damage to the permanent magnet electric closing controller, the current common practice is to add a manual closing device to replace the permanent magnet controller in controlling the permanent magnet closing mechanism after the permanent magnet controller fails, thereby ensuring timely closing of the circuit breaker. However, the existing manual closing device ignores the magnetic holding time required after the circuit breaker closes, affecting the stability of the circuit breaker closing. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the first aspect of this utility model provides a manual closing and holding device for a mobile circuit breaker.

[0006] The second aspect of this utility model provides a circuit breaker.

[0007] In view of this, a manual closing and holding device for a mobile circuit breaker is provided according to a first aspect of the embodiments of this application, comprising:

[0008] Spindle assembly;

[0009] The closing holding cam is mounted on the rotating shaft assembly, which drives the closing holding cam to rotate.

[0010] The linkage mechanism has its first end connected to the permanent magnet closing mechanism, and its second end extending to the bottom of the closing holding cam.

[0011] The holding section is located on the side wall of the closing holding cam. When the linkage mechanism is in contact with the holding section, the linkage mechanism does not move, so that the linkage mechanism is in the holding stage.

[0012] In one feasible implementation, the manual closing and holding device for the circuit breaker further includes:

[0013] A fixed base is located inside the housing, and a rotating shaft assembly passes horizontally through the fixed base and is rotatably connected to the fixed base.

[0014] In one feasible implementation, the manual closing and holding device for the circuit breaker further includes:

[0015] The anti-reverse mechanism is mounted on a fixed base and is locked to the shaft assembly. The anti-reverse mechanism restricts the shaft assembly from rotating in the reverse closing direction.

[0016] In one feasible implementation, the anti-reverse mechanism includes:

[0017] A ratchet is mounted on a rotating shaft assembly, and the ratchet rotates synchronously with the rotating shaft assembly.

[0018] A fixing rod, the first end of which is fixedly connected to a fixing base;

[0019] The locking part is rotatably connected to the second end of the fixing rod and is locked to the teeth of the ratchet to prevent the ratchet from reversing.

[0020] In one feasible implementation, the manual closing and holding device for the circuit breaker further includes:

[0021] A manual drive mechanism is provided, with its output end connected to the rotating shaft assembly to drive the rotating shaft assembly to rotate.

[0022] In one feasible implementation, the manually driven mechanism includes:

[0023] Driven sprocket, the driven sprocket is mounted on the rotating shaft assembly, and the driven sprocket rotates synchronously with the rotating shaft assembly;

[0024] A drive shaft passes through the housing and is rotatably connected to the housing;

[0025] The drive sprocket is mounted on the drive shaft and rotates synchronously with the drive shaft.

[0026] A chain is wound around the outside of the driven sprocket and the driving sprocket, and the chain drives the driven sprocket and the driving sprocket.

[0027] The handle is located outside the housing and is connected to the drive shaft to drive the drive shaft to rotate.

[0028] In one feasible implementation, the linkage mechanism includes:

[0029] The connecting rod has its first end and the second end set at an angle. The first end of the connecting rod is connected to the permanent magnet closing mechanism, and the second end of the connecting rod extends to the bottom of the closing holding cam.

[0030] The contact rod is horizontally positioned below the closing holding cam and is connected to the second end of the connecting rod.

[0031] In one feasible implementation, the closing retaining cam further includes a contact section and a transition section, the contact section, the transition section and the retaining section being connected end to end, forming a contact surface with the linkage mechanism in the circumferential direction of the closing retaining cam;

[0032] The closing holding cam has a notch that breaks the contact surface between the closing holding cam and the linkage mechanism, making the contact surface a discontinuous curved surface.

[0033] In one feasible implementation, the manual closing and holding device for the circuit breaker further includes:

[0034] The connector has a first end that is fixedly connected to the rotating shaft assembly, and a second end that extends radially away from the rotating shaft assembly.

[0035] The spring has its first end connected to the second end of the connector, and its second end connected to the inner wall of the housing. The spring provides tension to the shaft assembly.

[0036] According to a second aspect of the embodiments of this application, a circuit breaker is provided, including: a manual closing and holding device for a mobile circuit breaker as described in any of the above technical solutions.

[0037] The manual closing and holding device and circuit breaker of the mobile circuit breaker disclosed in this application have the following advantages compared with the prior art:

[0038] The manual closing and holding device for a mobile circuit breaker provided in this application includes a rotating shaft assembly, a closing and holding cam, a linkage mechanism, and a holding section. Driving the rotating shaft assembly to rotate causes the closing and holding cam to rotate. The closing and holding cam contacts the linkage mechanism below, causing the cam to rotate and press down on the linkage mechanism, making it move downwards. Simultaneously, the linkage mechanism drives the permanent magnet closing mechanism of the original circuit breaker to move downwards, performing the closing action of the circuit breaker. As the closing and holding cam rotates, the linkage mechanism reaches the closing point on the cam and contacts the holding section. The holding section design keeps the linkage mechanism in a fixed position for a period after closing, allowing the circuit breaker to enter the magnetic holding stage and achieve a certain closing and holding time. This prevents arcing inside the circuit breaker's vacuum tube caused by the linkage mechanism's movement in a short time after closing, avoiding safety accidents. The addition of the holding section increases the holding stage in the manual closing of the circuit breaker, ensuring stable closing and the safety of manual closing. Attached Figure Description

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 A schematic structural diagram of the first angle of a manual closing holding device for a mobile circuit breaker according to an embodiment of this application;

[0041] Figure 2 A schematic structural diagram of the closing holding cam of a manual closing holding device for a mobile circuit breaker according to an embodiment of this application;

[0042] Figure 3 A schematic structural diagram of the second angle of a manual closing and holding device for a mobile circuit breaker according to an embodiment of this application;

[0043] Figure 4 A schematic structural diagram of the manual drive mechanism of a manual closing and holding device for a mobile circuit breaker according to an embodiment of this application;

[0044] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0045] 1. Shaft assembly; 2. Closing holding cam; 3. Linkage mechanism; 4. Fixed base; 5. Anti-reverse mechanism; 6. Manual drive mechanism; 7. Connecting parts; 8. Permanent magnet closing mechanism; 9. Housing; 10. Spring;

[0046] 31. Connecting rod; 32. Contact rod;

[0047] 21. Contact section; 22. Transition section; 23. Holding section; 24. Closing point; 25. Gap;

[0048] 51. Ratchet; 52. Fixing rod; 53. Locking part;

[0049] 61. Driven sprocket; 62. Drive shaft; 63. Drive sprocket; 64. Chain; 65. Handle. Detailed Implementation

[0050] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0054] like Figure 1 and Figure 2 As shown, according to a first aspect of the embodiments of this application, a manual closing and holding device for a mobile circuit breaker is proposed, comprising: a rotating shaft assembly 1, a closing and holding cam 2, a linkage mechanism 3, and a holding section 23; the closing and holding cam 2 is disposed on the rotating shaft assembly 1, and the rotating shaft assembly 1 drives the closing and holding cam 2 to rotate; the first end of the linkage mechanism 3 is connected to a permanent magnet closing mechanism 8, and the second end of the linkage mechanism 3 extends to the lower part of the closing and holding cam 2; the holding section 23 is disposed on the side wall of the closing and holding cam 2, and when the linkage mechanism 3 contacts the holding section 23, the linkage mechanism 3 does not move, so that the linkage mechanism 3 is in the holding stage.

[0055] The manual closing and holding device for a mobile circuit breaker provided in this embodiment includes a rotating shaft assembly 1, a closing and holding cam 2, a linkage mechanism 3, and a holding section 23. Driving the rotating shaft assembly 1 to rotate causes the closing and holding cam 2 to rotate. The closing and holding cam 2 contacts the lower linkage mechanism 3, causing the closing and holding cam 2 to rotate and press down on the linkage mechanism 3, making the linkage mechanism 3 move downwards. Simultaneously, the linkage mechanism 3 drives the permanent magnet closing mechanism 8 of the original circuit breaker to move downwards together, performing the closing action of the circuit breaker and closing it. As the closing and holding cam 2 rotates, the linkage mechanism 23... After the lever mechanism 3 reaches the closing point 24 on the closing holding cam 2, it contacts the holding section 23 of the closing holding cam 2. The design of the holding section 23 keeps the position of the lever mechanism 3 unchanged for a period of time after closing, thereby enabling the circuit breaker to enter the magnetic holding stage and reach a certain closing holding time. This prevents arcing inside the circuit breaker vacuum tube caused by the action of the lever mechanism 3 in a short time after closing, thus avoiding safety accidents. The setting of the holding section 23 adds a holding stage to the manual closing of the circuit breaker, thereby ensuring the stable closing of the circuit breaker and the safety of manual closing of the circuit breaker.

[0056] It is understood that the circuit breaker opens and closes by moving the permanent magnet closing mechanism 8. In this application, the permanent magnet closing mechanism 8 is moved by the linkage mechanism 3 to close the circuit. The manual closing holding device is only used as another closing mechanism. Its closing principle is the same as that of the permanent magnet controller and is existing technology. It will not be described in detail here.

[0057] like Figure 1 , Figure 3 and Figure 4 As shown, in one feasible embodiment, the manual closing and holding device of the circuit breaker further includes: a fixed base 4; the fixed base 4 is disposed inside the housing 9, the rotating shaft assembly 1 passes horizontally through the fixed base 4, and the rotating shaft assembly 1 is rotatably connected to the fixed base 4.

[0058] In this technical solution, the entire closing and holding device is supported by a fixed base 4 and fixed inside the outer casing 9. The outer fixed base 4 provides rotational support for the rotating shaft assembly 1, ensuring the rotational stability of the rotating shaft assembly 1, and thus ensuring the stability of the contact between the closing and holding cam 2 and the linkage mechanism 3.

[0059] like Figure 1 , Figure 3 and Figure 4 As shown, in one feasible embodiment, the manual closing holding device of the circuit breaker further includes: an anti-reverse mechanism 5; the anti-reverse mechanism 5 is disposed on the fixed base 4, the anti-reverse mechanism 5 is locked with the rotating shaft assembly 1, and the anti-reverse mechanism 5 restricts the rotating shaft assembly 1 from rotating in the reverse closing direction.

[0060] In this technical solution, the anti-reverse mechanism 5 is installed on the fixed base 4 and is engaged with the rotating shaft assembly 1 to prevent the rotating shaft assembly 1 from reversing. This ensures that the rotation of the rotating shaft assembly 1 and the closing holding cam 2 can only press down the linkage mechanism 3, which in turn drives the permanent magnet closing mechanism 8 to move downward to close the circuit breaker. This prevents the rotating shaft assembly 1 from reversing and ensures that the linkage mechanism 3 will not move arbitrarily during the closing or holding phase, further improving the safety of the circuit breaker after closing.

[0061] like Figure 1 , Figure 3 and Figure 4 As shown, in one feasible embodiment, the anti-reverse mechanism 5 includes: a ratchet 51, a fixing rod 52, and a locking part 53; the ratchet 51 is disposed on the rotating shaft assembly 1, and the ratchet 51 rotates synchronously with the rotating shaft assembly 1; the first end of the fixing rod 52 is fixedly connected to the fixing base 4; the locking part 53 is rotatably connected to the second end of the fixing rod 52, and the locking part 53 locks with the teeth of the ratchet 51 to restrict the ratchet 51 from reversing.

[0062] In this technical solution, the locking part 53 is rotatably connected to the fixed base 4 via the fixed rod 52. The ratchet 51 is mounted on the rotating shaft assembly 1. The ratchet 51 rotates synchronously with the rotating shaft assembly 1. The locking part 53 locks the ratchet 51 with its teeth to limit the rotation direction of the ratchet 51 and prevent the ratchet 51 from reversing. This prevents the rotating shaft assembly 1 and the closing holding cam 2 from reversing, ensuring the stability of the closing holding cam 2 in limiting the linkage mechanism 3. This ensures that the circuit breaker remains stably in the magnetic holding stage after closing, thus ensuring the stability of closing.

[0063] like Figure 4 As shown, in one feasible embodiment, the manual closing and holding device of the circuit breaker further includes: a manual drive mechanism 6, the output end of which is connected to the rotating shaft assembly 1 to drive the rotating shaft assembly 1 to rotate.

[0064] In this technical solution, the manual drive mechanism 6 is used to drive the rotating shaft assembly 1 to rotate. In addition to the electric closing mechanism relying on the permanent magnet controller, another manual closing mechanism is added, which gives the circuit breaker a dual protection function. In the event of damage to the permanent magnet controller, the circuit breaker can also be closed through the manual drive mechanism 6, ensuring the reliable closing of the circuit breaker, helping to ensure the continuity of production, and reducing the losses caused by the permanent magnet controller's inability to close automatically.

[0065] like Figure 4As shown, in one feasible embodiment, the manual drive mechanism 6 includes: a driven sprocket 61, a drive shaft 62, a drive sprocket 63, a chain 64, and a handle 65; the driven sprocket 61 is mounted on the shaft assembly 1, and the driven sprocket 61 rotates synchronously with the shaft assembly 1; the drive shaft 62 passes through the housing 9 and is rotatably connected to the housing 9; the drive sprocket 63 is mounted on the drive shaft 62, and the drive sprocket 63 rotates synchronously with the drive shaft 62; the chain 64 is wound around the outside of the driven sprocket 61 and the drive sprocket 63, and the chain 64 provides a transmission connection between the driven sprocket 61 and the drive sprocket 63; the handle 65 is disposed outside the housing 9, and the handle 65 is connected to the drive shaft 62 to drive the drive shaft 62 to rotate.

[0066] In this technical solution, the control handle 65 drives the drive shaft 62 to rotate, the drive shaft 62 drives the active sprocket 63 to rotate, and then drives the driven sprocket 61 to rotate through the chain 64. The driven sprocket 61 drives the rotating shaft assembly 1 and the closing holding cam 2 to rotate, so as to manually close the linkage mechanism 3. Even if the permanent magnet controller is damaged, the circuit breaker can be manually closed through the manual drive mechanism 6, ensuring the reliable closing of the circuit breaker and thus ensuring continuous production.

[0067] like Figure 1 As shown, in one feasible embodiment, the linkage mechanism 3 includes: a connecting rod 31 and a contact rod 32; the first end of the connecting rod 31 is set at an angle to the second end of the connecting rod, the first end of the connecting rod 31 is connected to the permanent magnet closing mechanism 8, and the second end of the connecting rod 31 extends to the lower part of the closing holding cam 2; the contact rod 32 is set horizontally, the contact rod 32 is located below the closing holding cam 2, and the contact rod 32 is connected to the second end of the connecting rod.

[0068] In this technical solution, the linkage mechanism 3 is installed on the magnet of the permanent magnet closing mechanism 8. The closing holding cam 2 rotates with the rotating shaft assembly 1. The closing holding cam 2 presses down the contact rod 32, and the contact rod 32 drives the connecting rod 31 to move downward, so that the permanent magnet closing mechanism 8 performs the closing action, thereby closing the circuit breaker. Through the cooperation between the closing holding cam 2 and the contact rod 32, torque is transmitted to the connecting rod 31 to realize the closing of the circuit breaker.

[0069] Furthermore, a bushing is provided on the contact rod 32 to enable the linkage mechanism 3 to roll contact with the closing holding cam 2, thereby reducing the contact friction between the linkage mechanism 3 and the closing holding cam 2 and reducing the torque loss during the closing action of the linkage mechanism 3.

[0070] like Figure 2As shown, in one feasible embodiment, the closing retaining cam 2 further includes a contact section 21 and a transition section 22. The contact section 21, the transition section 22 and the retaining section 23 are connected end to end, forming a contact surface with the linkage mechanism 3 in the circumferential direction of the closing retaining cam 2. A notch 25 is provided on the closing retaining cam 2, and the notch 25 breaks the contact surface between the closing retaining cam 2 and the linkage mechanism 3, making the contact surface a discontinuous curved surface.

[0071] In this technical solution, when the linkage mechanism 3 contacts the contact surface, the position of the linkage mechanism 3 is controlled by the closing holding cam 2. Then, the linkage mechanism 3 contacts the contact section 21, the transition section 22 and the holding section 23 in sequence, so that the circuit breaker transitions from the opening stage to the closing stage and then to the closing holding stage. This prevents the linkage mechanism 3 from operating for a short time after closing, so that the permanent magnet circuit breaker is in the magnetic holding position after closing, thereby preventing arcing inside the vacuum tube of the circuit breaker, ensuring the stable closing of the circuit breaker and avoiding safety accidents. When it is necessary to open, the closing holding cam 2 continues to rotate, and the notch 25 on the closing holding cam 2 plays a yielding role, so that the linkage mechanism 3 is not restricted by the contact surface when opening and can be reset.

[0072] In this technical solution, due to the setting of the anti-reverse mechanism 5, the closing holding cam 2 can only rotate in one direction. By setting a notch 25 on the closing holding cam 2, it is ensured that the linkage mechanism 3 can be reset when the closing holding cam 2 cannot rotate in the reverse direction. Then, through the upward movement of the linkage mechanism 3, the circuit breaker can be tripped in time.

[0073] like Figure 4 As shown, in one feasible embodiment, the manual closing and holding device of the mobile circuit breaker further includes: a connector 7 and a spring 10; the first end of the connector 7 is fixedly connected to the shaft assembly 1, and the second end of the connector 7 extends radially away from the shaft assembly 1; the first end of the spring 10 is connected to the second end of the connector 7, and the second end of the spring 10 is connected to the inner wall of the housing, and the spring 10 provides tension to the shaft assembly 1.

[0074] In this technical solution, the connector 7 is set on the rotating shaft assembly 1. The connector 7 rotates synchronously with the rotating shaft assembly 1. When closing, the spring 10 releases its elastic force, and the closing holding cam 2 quickly moves from the closing transition section 22 to the closing point 24 by relying on the elastic force of the spring 10, so that the circuit breaker closes in time.

[0075] Furthermore, when the closing holding cam 2 contacts the contact section 21, the connecting piece 7 is in a vertical state. When the connecting piece 7 rotates more than 180 degrees with the rotating shaft assembly 1, the spring 10 provides an upward pulling force to the connecting piece 7, so that the closing holding cam 2 on the rotating shaft assembly 1 quickly moves from the closing transition section 22 to the closing point 24, thereby achieving rapid closing.

[0076] It should be noted that, due to the anti-reverse mechanism 5, the tension of the spring 10 is ensured not to cause the closing holding cam 2 to rotate in the opposite direction, ensuring that the spring force of the spring 10 is only used to assist in closing. By adjusting the spring force of the spring 10 in conjunction with the rotational movement of the closing holding cam 2, the closing time can be controlled to meet different closing requirements.

[0077] According to a second aspect of this application, a circuit breaker is proposed, comprising: a manual closing and holding device for a circuit breaker as described in any of the above technical solutions.

[0078] The circuit breaker provided in this application includes a manual closing and holding device for a mobile circuit breaker as described in any of the above technical solutions. Therefore, the circuit breaker possesses all the beneficial effects of the manual closing and holding device for a mobile circuit breaker as described in the above technical solutions, which will not be elaborated here.

[0079] Specifically, circuit breakers may include mobile circuit breakers.

[0080] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0081] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A manual closing and holding device for a mobile circuit breaker, characterized in that, The manual closing and holding device for the mobile circuit breaker includes: Spindle assembly; A closing holding cam is provided, which is mounted on the rotating shaft assembly, and the rotating shaft assembly drives the closing holding cam to rotate. A linkage mechanism, wherein the first end of the linkage mechanism is connected to the permanent magnet closing mechanism, and the second end of the linkage mechanism extends to the underside of the closing holding cam; A holding section is provided on the side wall of the closing holding cam. When the linkage mechanism contacts the holding section, the linkage mechanism does not move, so that the linkage mechanism is in the holding stage.

2. The manual closing and holding device for a mobile circuit breaker according to claim 1, characterized in that, The manual closing and holding device for the circuit breaker also includes: A fixed base is disposed inside the housing, and the rotating shaft assembly passes horizontally through the fixed base and is rotatably connected to the fixed base.

3. The manual closing and holding device for a mobile circuit breaker according to claim 2, characterized in that, The manual closing and holding device for the circuit breaker also includes: An anti-reverse mechanism is provided, which is mounted on the fixed base and locked to the rotating shaft assembly, thereby restricting the rotating shaft assembly from rotating in the reverse closing direction.

4. The manual closing and holding device for a mobile circuit breaker according to claim 3, characterized in that, The anti-reverse mechanism includes: A ratchet, which is mounted on the rotating shaft assembly and rotates synchronously with the rotating shaft assembly; A fixing rod, the first end of which is fixedly connected to the fixing base; The locking part is rotatably connected to the second end of the fixing rod and is locked to the teeth of the ratchet to restrict the ratchet from reversing.

5. The manual closing and holding device for a mobile circuit breaker according to claim 1, characterized in that, The manual closing and holding device for the circuit breaker also includes: A manual drive mechanism, the output end of which is connected to the rotating shaft assembly to drive the rotating shaft assembly to rotate.

6. The manual closing and holding device for a mobile circuit breaker according to claim 5, characterized in that, The manual drive mechanism includes: A driven sprocket is mounted on the rotating shaft assembly, and the driven sprocket rotates synchronously with the rotating shaft assembly; A drive shaft that passes through the housing and is rotatably connected to the housing; A drive sprocket, which is mounted on the drive shaft and rotates synchronously with the drive shaft; A chain, which is wound around the outside of the driven sprocket and the driving sprocket, and drives the driven sprocket and the driving sprocket together. A handle is disposed outside the housing and is connected to the drive shaft to drive the drive shaft to rotate.

7. A manual closing and holding device for a mobile circuit breaker according to claim 1, characterized in that, The linkage mechanism includes: A connecting rod, wherein the first end of the connecting rod is set at an angle to the second end of the connecting rod, the first end of the connecting rod is connected to the permanent magnet closing mechanism, and the second end of the connecting rod extends to the bottom of the closing holding cam; A contact rod, which is horizontally positioned and located below the closing and holding cam, is connected to the second end of the connecting rod.

8. The manual closing and holding device for a mobile circuit breaker according to claim 1, characterized in that, The closing and holding cam further includes a contact section and a transition section, wherein the contact section, the transition section and the holding section are connected end to end, and a contact surface with the linkage mechanism is formed in the circumferential direction of the closing and holding cam; The closing holding cam has a notch that breaks the contact surface between the closing holding cam and the linkage mechanism, making the contact surface a discontinuous curved surface.

9. A manual closing and holding device for a mobile circuit breaker according to claim 1, characterized in that, The manual closing and holding device for the circuit breaker also includes: A connector, the first end of which is fixedly connected to the rotating shaft assembly, and the second end of which extends radially away from the rotating shaft assembly. A spring, the first end of which is connected to the second end of the connector, and the second end of which is connected to the inner wall of the housing, the spring providing tension to the rotating shaft assembly.

10. A circuit breaker, characterized in that, Includes the manual closing and holding device for the mobile circuit breaker as described in any one of claims 1 to 9.

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