An operating mechanism for a switchgear

Abstract

This invention provides an operating mechanism for a switchgear, including a connector and a detection module. The detection module includes a housing, and a push rod, a common contact piece, a first stationary contact piece, a second stationary contact piece, and a moving contact piece installed in the housing. One end of the moving contact piece is connected to the common contact piece, making the moving contact piece cantilevered. The other end of the moving contact piece forms a movable end, which has a moving contact point located between the first stationary contact point and the second stationary contact point. When the main shaft rotates, the push protrusion can push the connector, causing the connector to move. The displacement of the connector can push the push rod to move. The displacement of the push rod can act on the movable end of the moving contact piece, causing the moving contact point to switch from contacting one of the first stationary contact point and the second stationary contact point to contacting the other one, which can facilitate the detection of the on / off state of the disconnecting switch.

Description

Technical Field

[0001] This invention relates to the field of switching device technology, and more specifically to an operating mechanism for a switching device. Background Technology

[0002] Disconnecting switches are used to operate circuits by opening or closing them, and they feature rapid opening or closing to minimize the effects of electric arcs. These switching devices are typically configured to be operated manually by an operator or using other tools, such as... Figure 1 In this system, the operating mechanism 1 of the disconnecting switch is operated by the operating handle 2, which in turn operates the moving contact to open or close the stationary contact through a series of linked components. When the disconnecting switch is open, it isolates non-energized parts from energized parts and creates a clear disconnection point to isolate faulty equipment or equipment undergoing power outage maintenance. During power outage maintenance of electrical equipment, isolating the equipment under maintenance from the power supply prevents safety accidents. Disconnecting switches are widely used in power distribution systems and automation systems in construction, power, petrochemical, and other industries.

[0003] In some disconnecting switches, a detection module is usually installed to monitor the on / off state of the main contacts to confirm whether the main contacts are in the expected on / off state. Disconnecting switches usually have high requirements for miniaturization; therefore, how to incorporate a detection module into a disconnecting switch while minimizing its impact on the switch's size, and further providing a design structure that facilitates the maintenance or replacement of the detection module, has always been a pursuit in the industry. Summary of the Invention

[0004] Therefore, in response to at least one of the above problems, the present invention provides an operating mechanism for a switching device.

[0005] This invention is implemented using the following scheme:

[0006] This invention proposes an operating mechanism for a switchgear, wherein the switchgear is a rotary switch structure. The operating mechanism includes a base and a main shaft, the main shaft being rotatably mounted on the base. The main shaft is used to transmit rotational motion, which, after transmission, actuates the contact system to achieve opening and closing. It also includes a connector and a detection module. The connector is displaceably mounted on the base and is located between the main shaft and the detection module. The outer surface of the main shaft is provided with a pushing protrusion.

[0007] The detection module includes a housing, and a push rod, a moving contact, a first stationary contact, and a second stationary contact disposed in the housing, wherein the moving contact is movably disposed between the first stationary contact and the second stationary contact;

[0008] When the spindle rotates, the pushing protrusion can push the connector, causing the connector to move; the displacement of the connector can push the push rod to move; the displacement of the push rod can act on the moving contact, causing the moving contact to switch contact with the first stationary contact or the second stationary contact.

[0009] In one embodiment, the detection module further includes a common contact piece, a first stationary contact piece, a second stationary contact piece, and a movable contact piece. The first stationary contact piece has a first stationary contact point at its first end, and the second stationary contact piece has a second stationary contact point at its first end. One end of the movable contact piece is connected to the common contact piece, so that the movable contact piece is cantilevered. The other end of the movable contact piece forms a movable end, and the movable end has the movable contact point. The displacement movement of the push rod can act on the movable end of the movable contact piece, so that the movable contact point can switch contact with the first stationary contact point or the second stationary contact point.

[0010] In one embodiment, the detection module further includes a swing rod and a spring. The swing rod is pivotally mounted to the housing via a pivot shaft. A push rod abuts against the swing rod and can push the swing rod to pivot around the pivot shaft. The first end of the spring is connected to the swing rod, and the second end of the spring is connected to the movable end of the moving contact piece. The displacement movement of the push rod acts on the movable end of the moving contact piece through the swing rod and the spring.

[0011] In one embodiment, the travel range of the push rod allows the first end of the spring to move from the first side of the movable contact piece to the second side of the movable contact piece, wherein the first side and the second side of the movable contact piece are opposite sides; when the push rod is not pushed by the connector, the movable end of the movable contact piece is subjected to the elastic force of the spring, causing the movable contact point to remain in contact with the second stationary contact point, while the movable contact point remains disconnected from the first stationary contact point; after the push rod is pushed by the connector, the push rod pushes the swing rod to pivot around the pivot axis, and the swing rod drives the spring to move via the first end of the spring, and the travel range of the push rod allows the movable contact point to disconnect from the second stationary contact point, while the movable contact point remains in contact with the first stationary contact point.

[0012] In one embodiment, the swing arm is L-shaped.

[0013] In one embodiment, the swing rod is plate-shaped with a pivot notch at one end, which engages with the pivot shaft.

[0014] In one embodiment, one end of the common contact piece is provided with a common terminal, the second end of the first stationary contact piece is provided with a normally open terminal, and the second end of the second stationary contact piece is provided with a normally closed terminal. The common terminal, the normally open terminal, and the normally closed terminal are all connected to the detection wire through a wire mounting base.

[0015] In one embodiment, the detection module is installed at an angle relative to the connector, such that the displacement direction of the push rod forms an angle with the displacement direction of the connector.

[0016] In one embodiment, the connector has an inclined surface that abuts against the push rod, so that the displacement of the connector is transmitted to the push rod via the inclined surface.

[0017] In one embodiment, the outer surface of the spindle is provided with two pushing protrusions distributed circumferentially, and the connector and the detection module are provided in two sets, with the two sets of detection modules and connectors arranged symmetrically.

[0018] In one embodiment, the connector is further provided with a limiting groove, and the base is further provided with a limiting protrusion. The limiting protrusion is engaged in the limiting groove to limit the maximum travel of the connector.

[0019] In one embodiment, the detection module is detachably installed on the base; the base is provided with a base hook and a base positioning protrusion, and the housing of the detection module is provided with a housing snap-fit ​​protrusion and a housing positioning surface. The base hook engages with the housing snap-fit ​​protrusion, and the base positioning protrusion abuts against the housing positioning surface, thereby enabling the detection module to be detachably installed on the base.

[0020] The technical solution provided by this invention has the following technical effects:

[0021] 1. This invention provides an operating mechanism for a switchgear, including a connector and a detection module. The detection module includes a housing, and a push rod, a common contact piece, a first stationary contact piece, a second stationary contact piece, and a moving contact piece installed in the housing. One end of the moving contact piece is connected to the common contact piece, making the moving contact piece cantilevered. The other end of the moving contact piece forms a movable end, which has a moving contact point located between the first stationary contact point and the second stationary contact point. When the main shaft rotates, the push protrusion can push the connector, causing the connector to move. The displacement of the connector can push the push rod to move. The displacement of the push rod can act on the movable end of the moving contact piece, causing the moving contact point to switch from contacting one of the first stationary contact point and the second stationary contact point to contacting the other one, which can facilitate the detection of the on / off state of the disconnecting switch.

[0022] 2. The detection module is installed at an angle relative to the connector, which allows the angled detection module to avoid interference with the transmission structure, making the disconnect switch more compact and improving space utilization.

[0023] 3. The detection module is detachably installed on the base, which facilitates maintenance or replacement of the detection module. Attached Figure Description

[0024] Figure 1 This is a perspective view of the disconnector switch operating mechanism and operating handle according to an embodiment of the present invention;

[0025] Figure 2 This is a partial exploded view of the operating mechanism of this embodiment;

[0026] Figure 3 This is a perspective view of the base of the disconnector switch operating mechanism in this embodiment, with the hidden portion shown.

[0027] Figure 4 This is a front view of the disconnector operating mechanism in this embodiment, with part of the base hidden and the connecting parts not being pushed.

[0028] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 This is a front view of the disconnector switch operating mechanism of this embodiment, with part of the base hidden and the connecting member being pushed.

[0030] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0031] Figure 8 This is a perspective view of the connector in this embodiment. Detailed Implementation

[0032] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-8 This embodiment provides a switchgear operating component. The switchgear is a rotary switch structure, which can be a disconnecting switch or a circuit breaker. In this embodiment, the switchgear is a disconnecting switch. The switchgear operating component includes an operating mechanism 1 and an operating handle 2. The operating handle 2 is connected to the operating mechanism 1 of the disconnecting switch. Rotating the operating handle 2 generates rotational motion, which, through transmission, actuates the contact system of the switchgear to achieve opening and closing. Of course, rotational motion can also be generated by means other than the operating handle 2, such as a motor.

[0035] The operating mechanism 1 includes a base 10, a main shaft 70, a first gear 80, a second gear 20, an energy storage element 30, a pin 40, a connecting rod 50, and a linkage component 60.

[0036] The main shaft 70 is rotatably mounted on the base 10. The main shaft 70 transmits rotational motion, such as the rotational motion of the operating handle 2. This rotational motion, after transmission, actuates the contact system to achieve opening and closing of the circuit breaker. Specifically, a first gear 80 is coaxially connected to one end of the main shaft 70, and a second gear 20 is rotatably mounted on the base 10. The axis of the main shaft 70 is perpendicular to the axis of the second gear 20. The first gear 80 includes a first bevel gear structure, and the second gear 20 includes a second bevel gear structure. The bevel gear structures of the first gear 80 and the second gear 20 cooperate with each other to achieve vertical power transmission. In this embodiment, the vertical power transmission is achieved by the axis of the main shaft 70 being perpendicular to the axis of the second gear 20. In other embodiments, depending on the specific rotational transmission direction required, the axis of the main shaft 70 and the axis of the second gear 20 may form a certain angle, which is also a feasible technical solution.

[0037] Reference Figure 1-3 The second gear 20 and the linkage component 60 are rotatably mounted within the base 10. The second gear 20 and the linkage component 60 are engaged through a mating structure to achieve synchronous rotation. The second gear 20 and / or the linkage component 60 drive the contact system of the disconnecting switch. The rotational motion of the second gear 20 and the linkage component 60 actuates the contact system of the disconnecting switch to achieve opening and closing.

[0038] The energy storage element 30 can be a compression spring, a tension spring, or other energy storage elements, such as a gas spring. This embodiment uses a compression spring as an example. The rotation of the linkage member 60 can actuate the energy storage element 30 to store energy. In this embodiment, the rotation of the linkage member 60 can compress the compression spring to store energy. The energy storage element 30 is sleeved on the connecting rod 50, which is used to guide and limit the energy storage element 30 during compression for energy storage or release. In this embodiment, the energy storage element 30 is sleeved on the connecting rod 50, so that the connecting rod 50 guides and limits the energy storage element 30 during energy storage or release. One end of the connecting rod 50 is hinged and positioned relative to the base 10. For example, one end of the connecting rod 50 is hinged to the base 10 via a pin 40, so that one end of the connecting rod 50 is hinged and positioned relative to the base 10; the other end of the connecting rod 50 is rotatably and slidably connected to the linkage member 60. The energy storage element 30 has two ends abutting against the pin 40 and the second gear 20 and / or the linkage component 60, respectively.

[0039] like Figure 3 , Figure 4 As shown, the assembly of the second gear 20 and the linkage member 60 rotates counterclockwise from the first position, shortening the distance between the second gear 20 or the linkage member 60 and the pin 40, thereby compressing and storing energy in the energy storage element 30. When the assembly of the second gear 20 and the linkage member 60 rotates to a specific position, the compression degree of the energy storage element 30 reaches its maximum value, thus maximizing the energy stored in the energy storage element 30. After reaching this position, the assembly of the second gear 20 and the linkage member 60 continues to rotate counterclockwise. Subsequently, the energy storage element 30 begins to release energy and drives the assembly of the second gear 20 and the linkage member 60 to rotate rapidly, causing the assembly of the second gear 20 and the linkage member 60 to rotate to the second position.

[0040] As previously described, the second gear 20 and / or the linkage component 60 drive the contact system. The rotational motion of the second gear 20 and the linkage component 60 actuates the contact system to achieve opening and closing. When the second gear 20 and the linkage component 60 rotate from the first position to the second position, the contact state of the contact system changes from the first state to the second state, for example, the contact system changes from the open state to the closed state.

[0041] Reference Figures 2-8 The operating mechanism 1 is also equipped with a detection module 90, which is used to detect the on / off state of the disconnecting switch.

[0042] The outer surface of the spindle 70 is provided with a pushing protrusion 71, and a connector 110 is also displaceable within the base 10, located between the spindle 70 and the detection module 90. When the spindle 70 rotates, the pushing protrusion 71 rotates and moves toward the connector 110, pushing the connector 110 and causing it to displace. This displacement of the connector 110 can then push the push rod 91 of the detection module 90 to displace as well.

[0043] The detection module 90 includes a housing 98, and a push rod 91, a moving contact 961, a first stationary contact 942, and a second stationary contact 952 disposed in the housing 98. The moving contact 961 is movably disposed between the first stationary contact 942 and the second stationary contact 952. The displacement movement of the push rod 91 can act on the moving contact 961, so that the moving contact 961 switches contact with the first stationary contact 942 or the second stationary contact 952.

[0044] Specifically, in this embodiment, the detection module 90 further includes a push rod 91, a swing rod 92, a common contact piece 93, a first stationary contact piece 94, a second stationary contact piece 95, a moving contact piece 96, and a spring 97, all installed in the housing 98. The push rod 91 is displaceably installed in the housing 98.

[0045] The first stationary contact piece 94 has a first stationary contact point 942 at its first end, and the second stationary contact piece 95 has a second stationary contact point 952 at its first end. One end of the moving contact piece 96 is connected to the common contact piece 93, making the moving contact piece 96 cantilevered. The other end of the moving contact piece 96 forms a movable end, which has a moving contact point 961, and the moving contact point 961 is movably disposed between the first stationary contact point 942 and the second stationary contact point 952. The displacement movement of the push rod 91 can act on the movable end of the moving contact piece 96, causing the moving contact point 961 to switch from contact with one of the first stationary contact point 942 and the second stationary contact point 952 to contact with the other one, that is, to switch the contact between the moving contact point 961 and the first stationary contact point 942 or the second stationary contact point 952.

[0046] Specifically, in this embodiment, a swing rod 92 is pivotally mounted to the housing 98 via a pivot shaft 921. A push rod 91 abuts against the swing rod 92, and the push rod 91 can push the swing rod 92 to pivot around the pivot shaft 921. The first end of the spring 97 is connected to the swing rod 92, and the second end of the spring 97 is connected to the movable end of the moving contact piece 96. The displacement movement of the push rod 91 acts on the movable end of the moving contact piece 96 through the swing rod 92 and the spring 97.

[0047] The travel range of the push rod 91 allows the first end of the spring 97 to move from the first side of the movable contact 96 to the second side of the movable contact 96, where the first and second sides of the movable contact 96 are opposite to each other. When the push rod 91 is not pushed by the connecting member 110, that is... Figure 4 , Figure 5 As shown, the movable end of the movable contact 96 is kept in contact with the second stationary contact 952 due to the elastic force of the spring 97, while the movable contact 961 remains disconnected from the first stationary contact 942. That is, the second stationary contact 95 is a normally closed contact, and the first stationary contact 94 is a normally open contact. After the push rod 91 is pushed by the connecting member 110, it moves as shown... Figure 6 , Figure 7 As shown, push rod 91 pushes swing rod 92 to pivot around pivot axis 921. Swing rod 92 drives spring 97 to move via the first end of spring 97. The range of motion of push rod allows moving contact 961 to disconnect from second stationary contact 952, while moving contact 961 contacts and maintains contact with first stationary contact 942. The design of swing rod 92 increases the stroke of push rod 91, resulting in greater design margin, improved product reliability, and reduced manufacturing costs.

[0048] One end of the common contact piece 93 is provided with a common terminal 931, the second end of the first stationary contact piece 94 is provided with a normally open terminal 941, and the second end of the second stationary contact piece 95 is provided with a normally closed terminal 951. The common terminal 931, the normally open terminal 941, and the normally closed terminal 951 are all connected to the detection wire through the wire mounting base, so that the on / off state of the disconnecting switch can be easily determined by detecting the continuity between the common terminal 931 and the normally open terminal 941 and the normally closed terminal 951.

[0049] The swing rod 92 is L-shaped, which allows space to be allocated to the main body of the spring 97 at one end, resulting in higher space utilization and a more compact structure.

[0050] The swing rod 92 is in the shape of a sheet, with a pivot notch 922 at one end. The pivot notch 922 is matched with the pivot shaft 921, so that the swing rod 92 can be pivotally mounted on the housing 98 through the pivot shaft 921. This structure is simple and reasonably designed. The swing rod 92 can be stamped from a sheet substrate, which results in low manufacturing cost.

[0051] Preferably, the outer surface of the spindle 70 is provided with two pushing protrusions 71 distributed circumferentially, and the connector 110 and the detection module 90 are provided in two sets. The two sets of detection modules 90 and connector 110 are symmetrically arranged, which makes the force on the spindle 70 more balanced, and the two sets of detection modules 90 also improve the detection accuracy.

[0052] Furthermore, the detection module 90 is installed at an angle relative to the connector 110, so that the displacement direction of the push rod 91 forms an angle with the displacement direction of the connector 110. This angle is greater than 0 degrees, which allows the tilted detection module 90 to avoid the transmission structures such as the main shaft 70, the first gear 80, the second gear 20, the energy storage element 30, the pin 40, the connecting rod 50, and the linkage component 60, making the disconnect switch more compact and space utilization more efficient.

[0053] The detection module 90 is detachably mounted on the base 10. A side cover 11 is provided on the base 10 corresponding to the position of the detection module 90, and the side cover 11 is detachably mounted on the base 10. By opening the side cover 11, the detection module 90 can be easily maintained or replaced. (Refer to...) Figure 8 The base 10 is provided with a base hook 13 and a base positioning protrusion 14. The housing 98 of the detection module 90 is provided with a housing snap-fit ​​protrusion 981 and a housing positioning surface 982. The base hook 13 is hooked and engaged with the housing snap-fit ​​protrusion 981, and the base positioning protrusion 14 abuts against the housing positioning surface 982, thereby realizing the detachable installation of the detection module 90 on the base 10 and improving the installation positioning accuracy and reliability of the detection module 90.

[0054] The connector 110 has an inclined surface 111 that abuts against the push rod 91. Thus, the displacement of the connector 110 is transmitted to the push rod 91 via the inclined surface 111, converting it into displacement of the push rod 91. Compared to a linear arrangement where the connector 110 and push rod 91 push each other, this embodiment uses the inclined surface 111 to abut against the push rod 91, thereby pushing the push rod 91. This results in better transmission and a more rational transmission structure. Therefore, while the inclined installation of the detection module 90 facilitates miniaturization, it also achieves better transmission performance to ensure detection reliability.

[0055] The connector 110 is also provided with a limiting groove 112, and the base 10 is also provided with a limiting protrusion 12. The limiting protrusion 12 is fitted into the limiting groove 112, thereby limiting the maximum travel of the connector 110, preventing the connector 110 from falling out when the detection module 90 is disassembled, and making the installation and positioning of the connector 110 on the base 10 more reliable.

[0056] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. An operating mechanism for a switchgear, wherein the switchgear is a rotary switch structure, the operating mechanism includes a base and a main shaft, the main shaft being rotatably mounted on the base, the main shaft being used to transmit rotational motion, the rotational motion being able to actuate a contact system to achieve opening and closing of the circuit breaker, characterized in that: It also includes a connector and a detection module. The connector is displaceably mounted on the base. The connector is located between the spindle and the detection module. The outer surface of the spindle is provided with a pushing protrusion. The detection module includes a housing, and a push rod, a moving contact, a first stationary contact, and a second stationary contact disposed in the housing, wherein the moving contact is movably disposed between the first stationary contact and the second stationary contact; When the spindle rotates, the pushing protrusion can push the connector, causing the connector to move; the displacement of the connector can push the push rod to move; the displacement of the push rod can act on the moving contact, causing the moving contact to switch contact with the first stationary contact or the second stationary contact.

2. The operating mechanism of the switching device according to claim 1, characterized in that: The detection module further includes a common contact piece, a first stationary contact piece, a second stationary contact piece, and a moving contact piece. The first stationary contact piece has a first stationary contact point at its first end, and the second stationary contact piece has a second stationary contact point at its first end. One end of the moving contact piece is connected to the common contact piece, so that the moving contact piece is cantilevered. The other end of the moving contact piece forms a movable end, and the movable end has the moving contact point. The displacement movement of the push rod can act on the movable end of the moving contact piece, so that the moving contact point can switch contact with the first stationary contact point or the second stationary contact point.

3. The operating mechanism of the switching device according to claim 2, characterized in that: The detection module also includes a swing rod and a spring. The swing rod is pivotally mounted to the housing via a pivot shaft. The push rod abuts against the swing rod and can push the swing rod to pivot around the pivot shaft. The first end of the spring is connected to the swing rod, and the second end of the spring is connected to the movable end of the moving contact piece. The displacement movement of the push rod acts on the movable end of the moving contact piece through the swing rod and the spring.

4. The operating mechanism of the switching device according to claim 3, characterized in that: The travel range of the push rod allows the first end of the spring to move from the first side of the movable contact piece to the second side of the movable contact piece, where the first and second sides of the movable contact piece are opposite to each other. When the push rod is not pushed by the connecting member, the movable end of the movable contact piece is subjected to the elastic force of the spring, causing the movable contact point to remain in contact with the second stationary contact point, while the movable contact point remains disconnected from the first stationary contact point. After the push rod is pushed by the connecting member, the push rod pushes the swing rod to pivot around the pivot axis. The swing rod drives the spring to move via the first end of the spring, and the travel range of the push rod allows the movable contact point to disconnect from the second stationary contact point, while the movable contact point remains in contact with the first stationary contact point.

5. The operating mechanism of the switching device according to claim 3, characterized in that: The swing arm is L-shaped.

6. The operating mechanism of the switching device according to claim 5, characterized in that: The swing rod is plate-shaped, with a pivot notch at one end, which is fitted to the pivot shaft.

7. The operating mechanism of the switching device according to claim 2, characterized in that: One end of the common contact piece is provided with a common terminal, the second end of the first stationary contact piece is provided with a normally open terminal, and the second end of the second stationary contact piece is provided with a normally closed terminal. The common terminal, the normally open terminal, and the normally closed terminal are all connected to the detection wire through a wire mounting base.

8. The operating mechanism of the switching device according to claim 1, characterized in that: The detection module is installed at an angle relative to the connector, such that the displacement direction of the push rod forms an angle with the displacement direction of the connector.

9. The operating mechanism of the switching device according to claim 8, characterized in that: The connector has an inclined surface that abuts against the push rod, so that the displacement of the connector is transmitted to the push rod via the inclined surface.

10. The operating mechanism of the switching device according to claim 1, characterized in that: The outer surface of the spindle is provided with two pushing protrusions distributed circumferentially. The connector and the detection module are provided in two sets, and the two sets of detection modules and connectors are symmetrically arranged.

11. The operating mechanism of the switching device according to claim 1, characterized in that: The connector is also provided with a limiting groove, and the base is also provided with a limiting protrusion. The limiting protrusion is fitted into the limiting groove to limit the maximum travel of the connector.

12. The operating mechanism of the switching device according to claim 1, characterized in that: The detection module is detachably installed on the base; the base is provided with a base hook and a base positioning protrusion, and the housing of the detection module is provided with a housing snap-fit ​​protrusion and a housing positioning surface. The base hook engages with the housing snap-fit ​​protrusion, and the base positioning protrusion abuts against the housing positioning surface, thereby enabling the detection module to be detachably installed on the base.

Images