Operating device of circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to an operating device of a circuit breaker. Comprising a shell, and further comprises a connecting rod mechanism which comprises an opening and closing shaft extending in the left-right direction and with the two ends rotatably connected with the shell, and a first clamping plate and a second clamping plate arranged on the opening and closing shaft in a sleeving mode; the spring mechanism comprises an extension spring extending in the front-back direction, one side of the extension spring is connected with the rear side of the shell, and the other side of the extension spring is connected with the second clamping plate; the movable rod mechanism comprises a movable rod, a movable contact, a connecting sleeve and a contact distance adjusting assembly, the movable rod extends into the shell from the outside of the shell in the front-back direction, the movable contact is arranged at the rear end of the movable rod, the connecting sleeve is arranged on the movable rod, the contact distance adjusting assembly is matched with the connecting sleeve, and the movable rod is connected with the first clamping plate; wherein a fixed contact arranged opposite to the movable contact and a driving assembly used for driving the opening and closing shaft to move in the front-back direction are arranged outside the shell. The operating device can adjust the distance between the movable contact and the fixed contact.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, especially an operating device of circuit breaker. BACKGROUND

[0002] In the operation and maintenance of power system, the circuit breaker operating device plays a vital role. As the key equipment for controlling and protecting the power line, it is mainly responsible for realizing the connection and disconnection of the circuit under normal working conditions, ensuring the stable transmission of power and meeting the power supply demand of various electrical equipment; and when the circuit has faults such as overload and short circuit, it can quickly act to cut off the current and protect the electrical equipment from damage, ensuring the safe operation of the power system and the safety of life and property.

[0003] Among the existing technical solutions, the traditional circuit breaker operating device often has certain limitations. For example, some common early designs of operating device have a relatively simple moving lever mechanism, which is only composed of a fixedly connected movable lever and a movable contact, lacking an effective contact distance adjusting assembly. This leads to the fact that in actual application, once the circuit breaker is installed, the initial distance between the movable contact and the fixed contact is fixed and cannot be flexibly adjusted according to subsequent operation requirements, equipment aging or environmental changes. After the electrical equipment has been running for a long time, the ideal contact distance between the movable contact and the fixed contact may change due to reasons such as wear and tear of the contact and thermal expansion and contraction, and the operating device in the prior art cannot adaptively adjust the distance, thereby affecting the opening and closing performance of the circuit breaker. Therefore, there is an urgent need to develop a circuit breaker operating device that can accurately adjust the distance between the movable contact and the fixed contact. SUMMARY

[0004] The utility model aims at providing an operating device of circuit breaker, which can accurately adjust the distance between the movable contact and the fixed contact.

[0005] The utility model is realized in this way, an operating device of circuit breaker, comprising a shell, further comprising:

[0006] A connecting rod mechanism comprising an opening and closing shaft extending in the left-right direction and rotatably connected to the shell at both ends, a first clamping plate and a second clamping plate sleeved on the opening and closing shaft;

[0007] A spring mechanism comprising a tensile spring extending in the front-rear direction, one side of the tensile spring being connected to the rear side of the shell and the other side being connected to the second clamping plate;

[0008] A moving lever mechanism comprising a movable lever extending from outside the shell to inside the shell in the front-rear direction, a movable contact provided at the rear end of the movable lever, a connecting sleeve provided on the movable lever, and a contact distance adjusting assembly cooperating with the connecting sleeve, the movable lever being connected to the first clamping plate;

[0009] The shell is externally provided with fixed contacts opposite to the movable contacts and a driving assembly for driving the opening and closing shaft to move in the front and back directions.

[0010] The utility model further sets up, be equipped with connecting assembly on the extension spring, connecting assembly includes:

[0011] The first connecting plate is fixedly connected to the rear side of the shell, and the first connecting plate is connected to the rear side of the extension spring;

[0012] The second connecting plate is connected to the front side of the extension spring, and the second connecting plate is rotatably connected to the second clamping plate.

[0013] The utility model further sets up, the contact distance adjusting assembly includes:

[0014] The outer threaded part is sleeved on the movable rod and connected to the rear side of the shell;

[0015] The inner threaded part is threadedly connected with the outer threaded part and can move in the front and back directions relative to the outer threaded part by rotating.

[0016] The utility model further sets up, the movable rod is equipped with the contact pressure adjusting assembly for adjusting the contact pressure under the different state of movable contact and fixed contact.

[0017] The utility model further sets up, the movable rod includes:

[0018] The connecting rod is rotatably connected to the first clamping plate;

[0019] The movable rod extends in the front and back directions through the rear side of the shell, the movable contact is located at the rear end of the movable rod, and the connecting sleeve and the contact distance adjusting assembly are located on the movable rod.

[0020] The utility model further sets up, wherein, the movable rod and the connecting rod have a gap for installing the contact pressure adjusting assembly.

[0021] The utility model further sets up, the contact pressure adjusting assembly includes:

[0022] Two bearing plates are respectively arranged at the front end of the movable rod and the rear end of the connecting rod;

[0023] The contact pressure spring is arranged between the bearing plates and extends in the front and back directions;

[0024] The guide part is arranged in the contact pressure spring, and the guide part is used for ensuring that the contact pressure spring extends and retracts in the front and back directions.

[0025] The utility model further sets up, the guide part is a guide rod arranged in the contact pressure spring and connected to the two bearing plates at both ends.

[0026] The utility model further sets up, drive assembly includes:

[0027] Pressing rod, be located in the lower of open and close axle, the pressing rod extends along the front and back direction;

[0028] Third clamping plate, set up in open and close axle and located between first clamping plate and second clamping plate, the third clamping plate with the rear end of pressing rod rotatable connection;

[0029] Wherein, the front end of pressing rod and external manual operation device cooperation.

[0030] Through adopting above-mentioned technical scheme, the utility model can obtain beneficial effect is:

[0031] 1. through setting outer thread part set up in movable rod with the rear side of shell is connected, inner thread part is connected with thread and can rotate and remove, the contact distance adjusting assembly that two cooperation forms, operating personnel can according to actual demand, such as equipment aging, environmental change causes the situation that contact spacing is not ideal, rotate inner thread part, make it move in front and back direction relative to outer thread part, drive the connecting sleeve and movable rod that cooperate with inner thread part remove, accurately adjust the distance between movable contact and fixed contact, avoid the problem that the contact wear aggravates when closing, the arc extinguishing is difficult when opening, improve the reliability of opening and closing of circuit breaker, guarantee the stable operation of power system.

[0032] 2. the design that connecting assembly adopts first connecting plate and is fixed in the rear side of shell and is connected with the rear side of tensile spring, second connecting plate is connected with the front side of tensile spring and with second clamping plate rotatable connection, make the force transmission more stable, smooth in the process that spring stores and releases elastic force.Compared with traditional simple fixed connection mode, this rotatable connection can adapt to the slight change of angle when spring stretches and contracts, avoid the spring force transmission obstruction caused by stress concentration or jamming in connecting part, ensure that open and close axle stably rotates under the action of spring, drive connecting rod mechanism reliable operation, further improve the overall response speed and action accuracy of circuit breaker operating device.

[0033] 3. by setting up the contact pressure adjusting assembly that is composed of two bearing plates, contact pressure spring and guide rod between movable rod and connecting rod in movable rod when circuit breaker opens and closes, with the change of movable rod position, the bearing plate of movable rod front end and connecting rod rear end extrudes or releases contact pressure spring.Guide rod ensures that contact pressure spring stably stretches and contracts in front and back direction, so that contact pressure can be adaptively adjusted according to the different state of movable contact and fixed contact, such as closing close contact and opening separation process, ensure the good electrical contact between contacts, reduce contact resistance, reduce the heating phenomenon, improve the electrical performance and service life of circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a three-dimensional structure schematic view of the utility model;

[0035] Figure 2 is a top view structure schematic view of the utility model;

[0036] Figure 3 is a A-A section structure schematic view of the utility model Figure 2 .

[0037] In the drawing, reference signs are: 1, shell; 2, connecting rod mechanism; 20, opening and closing shaft; 21, first clamping plate; 22, second clamping plate; 3, spring mechanism; 30, extension spring; 31, connecting assembly; 310, first connecting plate; 311, second connecting plate; 4, movable lever mechanism; 40, movable lever; 400, connecting rod; 401, movable lever; 41, connecting sleeve; 5, movable contact; 6, contact distance adjusting assembly; 60, external thread part; 61, internal thread part; 7, fixed contact; 8, driving assembly; 80, pressing lever; 81, third clamping plate; 9, contact pressure adjusting assembly; 90, bearing plate; 91, contact pressure spring; 92, guide part; 920, guide rod. DETAILED DESCRIPTION

[0038] The utility model will be further described in specific embodiments in combination with the drawings, referring to Figures 1-3 :

[0039] Embodiment 1:

[0040] The embodiment provides an operating device of circuit breaker, including shell 1, still including:

[0041] Connecting rod mechanism 2, including along left and right direction and both ends with shell 1 rotatable connection opening and closing shaft 20, the first clamping plate 21 and the second clamping plate 22 of setting on opening and closing shaft 20,

[0042] Spring mechanism 3, including the extension spring 30 along the front and back direction, the extension spring 30 one side with shell 1 rear side is connected and the other side with second clamping plate 22 is connected,

[0043] Movable lever mechanism 4, including along the front and back direction from the shell 1 extension to the inside of shell 1 movable lever 40, be arranged in movable lever 40 rear end movable contact 5, be arranged in movable lever 40 connecting sleeve 41 and with the contact distance adjusting assembly 6 of connecting sleeve 41 cooperation, the movable lever 40 is connected with first clamping plate 21,

[0044] Wherein, the shell 1 is equipped with movable contact 5 opposite setting fixed contact 7 and for driving opening and closing shaft 20 in the front and back direction movement driving assembly 8.

[0045] The shell 1 plays a role of protecting internal components, provides mounting support platforms for the connecting rod mechanism 2, the spring mechanism 3, the movable rod mechanism 4 and the like, and insulates from adverse environmental factors such as dust and water vapor, to ensure stable operation of internal components of the operating device.

[0046] The connecting rod mechanism 2 is used to transmit power of the driving assembly 8 to key transmission components of the movable rod mechanism 4, convert linear motion generated by the driving assembly 8 into a specific motion trajectory required by the movable rod mechanism 4, realize precise control of the movable contact 5, and complete the opening and closing actions of the circuit breaker.

[0047] The opening and closing shaft 20 is a core rotating component of the connecting rod mechanism 2, carries the first clamping plate 21 and the second clamping plate 22, and rotates around its own axis to transmit driving force from the driving assembly 8 to the first clamping plate 21, thereby driving the movable rod mechanism 4 to act. The opening and closing shaft 20 is in a cylindrical shape, horizontally penetrates the inside of the shell 1 along the left-right direction, and is rotatably connected to the shell 1 through bearings and the like at both ends, to ensure smooth rotation.

[0048] The first clamping plate 21 closely cooperates with the opening and closing shaft 20, rotates with the opening and closing shaft 20, and transmits power to the movable rod mechanism 4 through a connection relationship, and is a key link connecting the connecting rod mechanism 2 and the movable rod mechanism 4. The first clamping plate 21 is generally in a sheet structure with a gap between two portions sleeved on the opening and closing shaft 20, and is in a clearance fit with the opening and closing shaft 20, to ensure rotation with the shaft and facilitate installation and removal.

[0049] The second clamping plate 22 is connected to the tension spring 30 through the connecting assembly 31, rotates the opening and closing shaft 20 under the spring elastic force, realizes automatic opening action of the circuit breaker, and assists the first clamping plate 21 to stabilize the movement of the opening and closing shaft 20. The second clamping plate 22 is also in a sheet structure similar to the first clamping plate 21, and is sleeved on the opening and closing shaft 20 and arranged with a certain interval on the opening and closing shaft 20 from the first clamping plate 21.

[0050] The spring mechanism 3 mainly provides a power source for opening operation of the circuit breaker, stores elastic potential energy, releases energy when opening is required, drives the connecting rod mechanism 2 to act, and separates the movable contact 5 from the fixed contact 7 quickly to cut off the circuit.

[0051] The tension spring 30 stores and releases energy through its stretching and contraction, and is a key elastic element for realizing automatic opening of the circuit breaker. The tension spring 30 is in a spiral shape in structure, is arranged inside the shell 1, and extends in the front-rear direction. One end is stably connected to the rear side of the shell 1 through the connecting assembly 31, as a fixed support point; the other end is also connected to the second clamping plate 22 through the connecting assembly 31.

[0052] The connecting assembly 31 establishes an effective force transmission link in the spring mechanism 3. It connects the two ends of the tension spring 30 to the rear side of the housing 1 and the second clamping plate 22 respectively, so that the elastic potential energy stored in the spring can be smoothly transmitted.

[0053] The movable lever mechanism 4 is used to drive the movable contact 5 to move, so as to make contact or separation with the fixed contact 7, thereby realizing the conduction and disconnection of the circuit. When the movable lever mechanism 4 moves forward under external driving, the movable contact 5 approaches and finally contacts the fixed contact 7, and the current can pass smoothly, and the circuit is in the conduction state; when the movable lever mechanism 4 moves backward, the movable contact 5 is separated from the fixed contact 7, and the circuit is cut off.

[0054] The movable lever 40 plays a key role in bearing the movable contact 5 and transmitting power. It can drive the movable contact 5 to realize linear movement in the forward and backward directions under the driving of the connecting rod mechanism 2, so as to complete the contact or separation action with the fixed contact 7, and guarantee the normal control and protection function of the circuit breaker on the circuit.

[0055] The connecting sleeve 41 cooperates with the contact distance adjustment assembly 6 to work, and converts the forward and backward movement of the inner threaded part 61 into linear motion of the movable lever 40 through the interaction with the inner threaded part 61, so as to realize accurate adjustment of the position of the movable contact 5, and ensure that the distance between the movable contact 5 and the fixed contact 7 can be adjusted according to the actual working condition requirements, and the electrical performance of the circuit breaker is optimized. The connecting sleeve 41 is generally in a cylindrical structure, hollow inside, sleeved on the movable lever 40, and in clearance fit with the movable lever 40, and can slide relatively to adapt to the forward and backward movement of the movable lever 40 and the adjustment of its own position. The outer side is in close fit with the inner threaded part 61 of the contact distance adjustment assembly 6, and is located on the movable lever 40 close to the side of the movable contact 5. Through this layout, the action of the contact distance adjustment assembly 6 can be transmitted to the movable lever 40, and then the position of the movable contact 5 is affected.

[0056] The contact distance adjustment assembly 6 is used to accurately adjust the distance between the movable contact 5 and the fixed contact 7, so as to adapt to the change of the contact distance caused by various factors such as equipment installation error, long-term running of the contact, thermal expansion and contraction caused by environmental temperature change, etc., to ensure that the movable contact 5 and the fixed contact 7 can be in good contact when closing, and can be completely separated when opening, to maintain the best performance state of the circuit breaker, and improve the reliability and stability of its operation.

[0057] The driving assembly 8 provides external driving force for the closing operation of the circuit breaker, and transmits the external operating force to the connecting rod mechanism 2, so that the opening and closing shaft 20 rotates and drives the movable lever mechanism 4 to realize the closing action of the movable contact 5 and the fixed contact 7.

[0058] By manually operating the driving assembly 8, force is transmitted to the opening and closing shaft 20, the opening and closing shaft 20 drives the connecting rod mechanism 2 to move, the connecting rod mechanism 2 pulls the movable lever mechanism 4 to make the movable contact 5 contact or separate from the fixed contact 7, and the circuit is turned on or turned off. In this process, the spring mechanism 3 stores and releases elastic potential energy by stretching and releasing the tension spring 30, assists the movable lever mechanism 4 to complete the action, and can buffer the impact force when the contacts are closed.

[0059] Embodiment 2:

[0060] The embodiment provides an operating device of a circuit breaker, in addition to the technical scheme of the above-mentioned embodiment, further having the following technical features.

[0061] The tension spring 30 is provided with a connecting assembly 31, and the connecting assembly 31 comprises:

[0062] The first connecting plate 310 is fixed to the rear side of the shell 1, and the first connecting plate 310 is connected to the rear side of the tension spring 30;

[0063] The second connecting plate 311 is connected to the front side of the tension spring 30, and the second connecting plate 311 is rotatably connected to the second clamping plate 22.

[0064] The first connecting plate 310 is a fixed component for connecting the tension spring 30 to the rear side of the shell 1, ensures that the rear side of the tension spring 30 is stably attached to the shell 1, provides a support point for the tension spring 30, and enables the tension spring 30 to play a corresponding mechanical role in the operation process of the circuit breaker. The first connecting plate 310 is usually a sheet structure, one side of which is connected to the rear side of the shell 1 by welding, bolt connection or the like, and the other side is connected to the tension spring 30 by a hook or riveting or the like.

[0065] The second connecting plate 311 is used for connecting the front side of the tension spring 30 to the second clamping plate 22, on the one hand, transmitting spring tension, enabling the second clamping plate 22 to produce a corresponding action under the action of the spring, and on the other hand, realizing flexible connection between the spring and the clamping plate, allowing a certain angle of rotation to adapt to the movement of the connecting rod mechanism 2. The second connecting plate 311 is a sheet structure similar to the first connecting plate 310, one side of which is connected to the tension spring 30 by a hook or riveting or the like, and the other side is rotatably connected to the second clamping plate 22 by a pin shaft, enabling the second clamping plate 22 to swing flexibly.

[0066] Embodiment 3:

[0067] The embodiment provides an operating device of a circuit breaker, in addition to the technical scheme of the above-mentioned embodiment, further having the following technical features.

[0068] The contact distance adjusting assembly 6 comprises:

[0069] The outer threaded part 60 is sleeved on the movable rod 40 and connected with the rear side of the shell 1.

[0070] The inner threaded part 61 is threadedly connected with the outer threaded part 60 and can move in the front-rear direction relative to the outer threaded part 60 by rotating.

[0071] The outer threaded part 60 provides a mounting position for the inner threaded part 61 and realizes accurate adjustment of the position of the movable rod 40 through the threaded cooperation with the inner threaded part 61. Its role is to adjust the distance between the movable contact 5 and the fixed contact 7 to meet different electrical connection requirements and ensure that the circuit breaker realizes good conduction and disconnection functions at the appropriate spacing. The outer threaded part 60 is generally a tubular structure with external threads, which can be sleeved on the movable rod 40 through clearance fit, and the rear side of the shell 1 can be connected through welding, screwing, etc.

[0072] The inner threaded part 61 cooperates with the outer threaded part 60 to realize movement in the front-rear direction relative to the outer threaded part 60 by rotating. This movement can accurately change the position of the movable rod 40, thereby adjusting the distance between the movable contact 5 and the fixed contact 7. The inner threaded part 61 is a cylindrical structure with internal threads, which is located outside the outer threaded part 60 and is nested with the outer threaded part 60.

[0073] Embodiment 4:

[0074] The embodiment provides an operating device of a circuit breaker, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0075] The movable rod 40 is provided with a contact pressure adjusting assembly 9 for adjusting the contact pressure in different states of the movable contact 5 and the fixed contact 7.

[0076] The contact pressure adjusting assembly 9 adjusts the contact pressure between the contacts to ensure that there is enough pressure between the movable contact 5 and the fixed contact 7 to make them tightly fit. This can reduce the contact resistance and reduce the heating phenomenon caused by poor contact, ensuring that the current can stably pass through the contacts, thereby realizing reliable conduction of the circuit.

[0077] Embodiment 5:

[0078] The embodiment provides an operating device of a circuit breaker, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0079] The movable rod 40 comprises:

[0080] The connecting rod 400 is rotatably connected with the first clamping plate 21;

[0081] The movable rod 401 extends through the rear side of the shell 1 and extends in the front-rear direction, the movable contact 5 is located at the rear end of the movable rod 401, and the connecting sleeve 41 and the contact distance adjusting assembly 6 are both located on the movable rod 401.

[0082] The movable rod 401 and the connecting rod 400 have a gap for installing the contact pressure adjusting assembly 9.

[0083] The connecting rod 400 serves as a connecting component between the movable rod mechanism 4 and the connecting rod mechanism 2, and plays a role in transmitting force. It transmits the movement of the first clamping plate 21 to the movable rod 401, so that the movable rod 401 can move forward and backward under the drive of the first clamping plate 21, thereby controlling the contact and separation of the movable contact 5 and the fixed contact 7, and realizing the on-off of the circuit. The connecting rod 400 is usually a long strip-shaped rod structure, and its cross-sectional shape can be circular, square or other shapes that are convenient for processing and connection. The connecting rod 400 can be connected with the first clamping plate 21 through a pin shaft.

[0084] The movable rod 401 drives the movable contact 5 to contact or separate from the fixed contact 7 through forward and backward movement, thereby realizing the conduction and disconnection of the circuit. At the same time, the connecting sleeve 41 and the contact distance adjusting assembly 6 are installed on the movable rod 401, and the position and contact pressure of the movable contact 5 can be adjusted through these components to meet different circuit requirements. The movable rod 401 is usually an elongated rod structure, and its shape is usually cylindrical. The rear end of the movable rod 401 is connected with the movable contact 5 through welding or threaded connection to ensure the stable installation of the movable contact 5; a gap is left between the front end of the movable rod 401 and the rear end of the connecting rod 400 for installing the contact pressure adjusting assembly 9.

[0085] Embodiment 6:

[0086] The operation device of the circuit breaker provided in the embodiment further has the following technical features in addition to the technical solutions of the above-mentioned embodiments.

[0087] The contact pressure adjusting assembly 9 comprises:

[0088] Two bearing plates 90 are respectively arranged at the front end of the movable rod 401 and the rear end of the connecting rod 400;

[0089] A contact pressure spring 91 is arranged between the bearing plates 90 and extends in the front-rear direction;

[0090] A guide part 92 is arranged in the contact pressure spring 91, and the guide part 92 is used to ensure the extension and contraction of the contact pressure spring 91 in the front-rear direction.

[0091] The bearing plate 90 is used to bear the elastic force of the contact pressure spring 91 and to transmit the force to the movable rod 401 and the connecting rod 400. Its function is to act as a force transmission medium so that the elastic force of the contact pressure spring 91 can effectively act on the movable rod 401 and the connecting rod 400, thereby adjusting the contact pressure between the movable contact 5 and the fixed contact 7. The bearing plate 90 is generally a flat plate structure, and the shape is generally circular or square. Both bearing plates 90 are respectively fixed to the front end of the movable rod 401 and the rear end of the connecting rod 400 by welding.

[0092] The contact pressure spring 91 is used to generate elastic force by itself. When the movable contact 5 is in contact with the fixed contact 7, the contact pressure spring 91 can provide appropriate pressure to ensure close contact between the contacts, reduce contact resistance, and prevent problems such as arc during circuit switching. The contact pressure spring 91 is fixed between the two bearing plates 90 by extending in the front-rear direction through welding.

[0093] The guide part 92 is used to guide the contact pressure spring 91 to stretch and contract in the front-rear direction, preventing the spring from bending or deviating during stretching and contraction. Its function is to ensure that the contact pressure spring 91 can stably generate axial elastic force, thereby accurately adjusting the contact pressure between the movable contact 5 and the fixed contact 7.

[0094] Embodiment 7:

[0095] The operation device of the circuit breaker provided in the embodiment further has the following technical features in addition to the technical solutions of the above-mentioned embodiments.

[0096] The guide part 92 is a guide rod 920 arranged in the contact pressure spring 91 and connected to the two bearing plates 90 at both ends.

[0097] The guide rod 920 is used to guide the contact pressure spring 91 to stretch and contract in the front-rear direction, ensuring the stability of the deformation direction of the spring and avoiding irregular deformation such as deviation and distortion of the spring during stretching and contraction. The guide rod 920 is usually an elongated cylindrical structure, usually a solid rod. The two ends of the guide rod 920 can be connected to the bearing plates 90 on both sides by welding or threading.

[0098] Embodiment 8:

[0099] The operation device of the circuit breaker provided in the embodiment further has the following technical features in addition to the technical solutions of the above-mentioned embodiments.

[0100] The drive assembly 8 comprises:

[0101] The pressing rod 80 is arranged below the opening and closing shaft 20, and the pressing rod 80 extends in the front-rear direction.

[0102] A third clamping plate 81 is sleeved on the opening and closing shaft 20 and located between the first clamping plate 21 and the second clamping plate 22, and the rear end of the pressing rod 80 is rotatably connected with the third clamping plate 81.

[0103] The front end of the pressing rod 80 is matched with an external manual operating device.

[0104] The pressing rod 80 is a receiving component of the external manual operating force. Its main function is to transmit the manual pressing force applied by the operator to other components inside the device, so as to drive the operating device of the entire circuit breaker to act, thereby realizing the on-off control of the circuit. The pressing rod 80 is usually a long strip-shaped rod structure, and the front end is matched with the external manual operating device; the rear end is rotatably connected with the third clamping plate 81, and is usually connected through a pin shaft. This connection mode can convert the linear motion of the pressing rod 80 into the rotary motion of the third clamping plate 81.

[0105] The third clamping plate 81 is used for converting the linear motion of the pressing rod 80 into the movement of the opening and closing shaft 20. Its function is to act as a bridge for force transmission and motion conversion between the pressing rod 80 and the opening and closing shaft 20, so as to drive the connecting rod mechanism 2 to move, and finally realize the contact and separation of the movable contact 5 and the fixed contact 7, thereby completing the on-off operation of the circuit. The third clamping plate 81 is usually a sheet-shaped structure similar to the first clamping plate 21 and the second clamping plate 22, and is sleeved on the opening and closing shaft 20 and located between the first clamping plate 21 and the second clamping plate 22.

[0106] The above embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An operating device for a circuit breaker comprising a housing (1), characterized in that Also include: Connecting rod mechanism (2), including extending along the left and right direction and both ends with the shell (1) can be rotatable connection of open and close shaft (20), set on the open and close shaft (20) on the first clamping plate (21) and the second clamping plate (22); Spring mechanism (3), including extending along the front and back direction of the tension spring (30), the tension spring (30) side with the shell (1) rear side connected to the other side with the second clamping plate (22) connected; The moving rod mechanism (4), including extending from the shell (1) outside to the shell (1) inside of the movable rod (40), the movable contact (5) is arranged at the rear end of the movable rod (40), the connecting sleeve (41) is arranged on the movable rod (40), and the contact distance adjusting assembly (6) is matched with the connecting sleeve (41), the movable rod (40) is connected with the first clamping plate (21); Wherein, the shell (1) is provided with a fixed contact (7) arranged opposite to the movable contact (5) and a driving assembly (8) for driving the open and close shaft (20) to move in the front and back direction.

2. An operating device for a circuit breaker according to claim 1, characterized in that The connecting assembly (31) is arranged on the tension spring (30), and the connecting assembly (31) comprises: The first connecting plate (310) is fixedly connected to the rear side of the shell (1), and the first connecting plate (310) is connected with the rear side of the tension spring (30); The second connecting plate (311) is connected with the front side of the tension spring (30), and the second connecting plate (311) is rotatably connected with the second clamping plate (22).

3. An operating device for a circuit breaker according to claim 1, characterized in that The contact distance adjusting assembly (6) comprises: The outer threaded part (60) is sleeved on the movable rod (40) and connected with the rear side of the shell (1); The inner threaded part (61) is threadedly connected with the outer threaded part (60) and can move in the front and back direction relative to the outer threaded part (60) by rotating.

4. The operating mechanism of claim 1 wherein, The movable rod (40) is provided with a contact pressure adjusting assembly (9) for adjusting the contact pressure in different states of the movable contact (5) and the fixed contact (7).

5. An operating device for a circuit breaker according to claim 4, characterized in that The movable rod (40) comprises: The connecting rod (400) is rotatably connected with the first clamping plate (21); The movable rod (401) extends in the front and back direction and penetrates through the rear side of the shell (1), the movable contact (5) is located at the rear end of the movable rod (401), the connecting sleeve (41) and the contact distance adjusting assembly (6) are located on the movable rod (401); Wherein, the movable rod (401) and the connecting rod (400) have a gap for installing the contact pressure adjusting assembly (9) therebetween.

6. An operating device for a circuit breaker according to claim 5, characterized in that The contact pressure adjusting assembly (9) comprises: Two bearing plates (90) are respectively arranged at the front end of the movable rod (401) and the rear end of the connecting rod (400); The contact pressure spring (91) is arranged between the bearing plates (90) and extends in the front and back direction; The guide part (92) is arranged in the contact pressure spring (91), and the guide part (92) is used for ensuring that the contact pressure spring (91) extends and retracts in the front and back direction.

7. An operating device for a circuit breaker according to claim 6, characterized in that The guide part (92) is a guide rod (920) arranged in the contact pressure spring (91) and connected with the two bearing plates (90) at both ends.

8. The operating mechanism of claim 1 wherein, The driving assembly (8) comprises: A pressing rod (80) is arranged below the opening and closing shaft (20), and extends in the front-rear direction; A third clamping plate (81) is sleeved on the opening and closing shaft (20) and located between the first clamping plate (21) and the second clamping plate (22), and the rear end of the third clamping plate (81) is rotatably connected with the pressing rod (80); The front end of the pressing rod (80) is matched with an external manual operating device.

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