A compact modular switch operating mechanism

Abstract

A compact modular switch operating mechanism disclosed by the present invention comprises a fixed seat, a motor driving device, an energy storage device, a tripping device and a closing device. The motor driving device includes a motor, a pinion gear driven by the motor, and a large gear. A cam designed coaxially is installed on the large gear. The fixed seat is provided with a reverse driving device, which includes an output shaft assembly, an output reverse driving shaft assembly and a connecting plate. The cam has a concave portion and a convex portion. When the cam rotating with the large gear rotates from the concave portion to the convex portion, a roller drives an output crank to rotate the output shaft. At this time, the rotating direction of the output shaft is opposite to the rotating direction of the energy storage device. Through the transmission of the connecting plate by the second crank on the reverse driving shaft, rotation is achieved, and its rotating direction is opposite to that of the output shaft and the same as the rotating direction of the above-mentioned energy storage device. The output reverse driving shaft is connected with an auxiliary switch assembly. Through the ingenious internal layout design, the output reverse driving device is designed, making the product compact in volume and integrating electrical components together.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission and distribution switchgear, and particularly to a compact modular switch operating mechanism for a circuit breaker (load switch). Background Art

[0002] With the progress of technology and the development of the economy, the available floor space is becoming increasingly tight. The market's demand for switchgear with small volume and high performance is extremely urgent. This poses requirements for the operating mechanism to be miniaturized, modularized, and standardized.

[0003] Currently, for the operating mechanism of switchgear, especially for ring network switchgear, the operating mechanism has no counter. The auxiliary switch is installed on the cabinet body. The interlocking device is large in size and cumbersome to operate. The manual operation button uses a knob, which requires a large operating force. The output reverse movement adopts a gear method. It has a short service life, is not easy to maintain later, and has no interchangeability. In view of the above defects, the present solution proposes improvements. Summary of the Invention

[0004] The present invention provides a compact modular switch operating mechanism, which solves the above problems existing in the prior art during use.

[0005] The technical solution of the present invention is realized as follows:

[0006] A compact modular switch operating mechanism includes a fixed seat, a motor driving device, an energy storage device, a tripping device, and a closing device. The motor driving device, the tripping device, and the closing device are all installed on the fixed seat. It is characterized in that: the motor driving device includes a motor, a small gear driven by the motor, and a large gear meshing with the small gear for transmission. The energy storage device is installed on the large gear and rotates in the same direction as the large gear. A cam with a coaxial design is installed on the large gear. A reverse movement device is installed on the fixed seat, and the reverse movement device includes an output shaft assembly, an output reverse movement shaft assembly, and a connecting plate. The output shaft assembly includes an output shaft, an output crank arm, and a first crank arm. The output crank arm is equipped with a roller, and the roller is in contact with the surface of the cam;

[0007] The output reverse movement shaft assembly includes an output reverse movement shaft, an outer joint, and a second crank arm. The first crank arm and the second crank arm are movably connected by a connecting plate;

[0008] The above-mentioned cam has a concave portion and a convex portion. When the cam rotating with the large gear rotates from the concave portion to the convex portion, the roller drives the output crank arm to rotate the output shaft. At this time, the rotation direction of the output shaft is opposite to the rotation direction of the energy storage device, and it rotates through the transmission of the connecting plate by the second crank arm on the reverse movement shaft. Its rotation direction is opposite to that of the output shaft and the same as the rotation direction of the above-mentioned energy storage device. The output reverse movement shaft is connected with an auxiliary switch assembly.

[0009] Preferably, the auxiliary switch assembly includes a third crank arm, a connecting rod, and an auxiliary switch. The third crank arm is connected to the output end of the output reverse shaft and drives a fourth crank arm connected to the auxiliary switch. One end of the connecting rod is connected to the third crank arm, and the other end is connected to the fourth crank arm. The rotation of the output reverse shaft drives the auxiliary switch to operate to cut off the power supply.

[0010] Preferably, an electrical component integration device is further included. The electrical component integration device includes a travel switch and a counter assembly. It rotates with the energy storage device to drive the closing or cutting off of the travel switch. The counter assembly includes a counter and a tension spring. One end of the tension spring is connected to the counter, and the other end is connected to the fourth crank arm and is synchronized with the fourth crank arm. When the fourth crank arm rotates once to drive the auxiliary switch once, the tension spring also pulls the counter to count once.

[0011] Preferably, a closing and opening button device is further installed on the fixed seat. The closing and opening button device is divided into a tripping button device and a closing button device.

[0012] Preferably, the tripping button device includes a tripping button, a tripping return spring, a tripping inclined plate, a tripping roller, and a tripping lever. One end of the tripping return spring is installed on the tripping button, and the other end is installed on the fixed seat. The tripping button is installed with a tripping inclined plate. One end of the tripping lever is connected to the opening and closing part of the tripping device, and the other end is connected to the tripping roller. The tripping roller is located below the tripping inclined plate. The tripping lever swings by pressing the tripping button.

[0013] Preferably, the closing button device includes a closing button, a closing return spring, a closing inclined plate, a closing roller, and a closing lever. One end of the closing return spring is installed on the closing button, and the other end is installed on the fixed seat. The closing button is installed with a closing inclined plate. One end of the closing lever is connected to the opening and closing part of the closing device, and the other end is connected to the closing roller. The closing roller is located below the closing inclined plate. The closing lever swings by pressing the closing button.

[0014] Preferably, an interlocking device is further installed on the fixed seat. The interlocking device includes an interlocking plate, a movement limiting rod, and a moving arm. The middle of the moving arm is installed on the fixed seat through a shaft and is divided into a left connecting arm and a right connecting arm. One end of the interlocking plate is connected to the left connecting arm, and the movement limiting rod is installed adjacent to the right connecting arm. The movement limiting rod is installed on the shaft end of the closing device.

[0015] Preferably, a device for preventing repeated closing is further installed on the fixed seat. The device for preventing repeated closing includes a flexible ejector rod and a limiting rod. The above-mentioned output shaft has an external installation part. The flexible ejector rod is installed on the external installation part of the output shaft and rotates with it. The other end of the flexible ejector rod is connected to one end of the limiting rod. The closing device has a shaft end. The other end of the limiting rod is on the shaft end of the closing device.

[0016] Preferably, the fixed seat includes a front plate and a rear plate. A number of support rods are installed between the front plate and the rear plate, and an installation area is formed between the front plate and the rear plate. The above-mentioned motor driving device, opening device and closing device are installed in the installation area.

[0017] From the above solution, it can be seen that the present invention has the following characteristics:

[0018] 1. For this compact modular switch operating mechanism, if the volume of the mechanism is to be reduced, first, the output direction of the mechanism needs to be changed, that is, from clockwise to counterclockwise or from counterclockwise to clockwise. Therefore, the present invention adds a reverse movement device. The so-called reverse movement device is to add another output shaft (referred to as the output reverse movement shaft) at the upper end (or lower end) of the original output shaft. A crank arm is welded on each output shaft, and there is a connecting plate between the crank arms. In this way, when the output shaft rotates clockwise, the reverse movement shaft rotates counterclockwise, and when the output shaft rotates counterclockwise, the reverse movement shaft rotates clockwise.

[0019] 2. For this compact modular switch operating mechanism, if the mechanism is to be modularized, the electrical components originally installed on the cabinet body must be integrated on the mechanism. These mainly include: auxiliary switches, travel switches, opening and closing electromagnets, terminal blocks, and counters. Through ingenious layout, the present invention installs them on the front and rear plates of the mechanism respectively, and when an electrical component fails, it can be replaced without disassembling the whole mechanism.

[0020] 3. In the past, the opening and closing of the operating mechanism used a knob method. Due to the large operating force of the mechanism, people with small strength couldn't turn it, and people with large strength were prone to break it. This compact modular switch operating mechanism adds a manual button method in addition to the single rotation method when manually operating the opening and closing. It can be selected according to the user's needs.

[0021] 4. This compact modular switch operating mechanism also integrates the interlocking device on the mechanism. In the past, the interlocking devices of the mechanisms were all separated from the mechanism, with large volume and complex debugging. Through reasonable layout, the present invention installs the interlocking device on the front plate of the mechanism, integrating it with the mechanism. It doesn't need to be debugged on the switchgear and can be directly installed.

[0022] 5. This compact modular switch operating mechanism adds a function to prevent repeated closing. The so-called prevention of repeated closing means that when the switch is in the closed state, the closing button cannot be pressed. It can only be pressed when the switch is in the open state.

[0023] In summary, in addition to the motor drive device, energy storage device, and opening and closing devices on the traditional operating mechanism, the present solution adds an output reverse movement device. The output reverse movement device changes the output rotation direction of the mechanism from clockwise to counterclockwise. And electrical components such as the counter and auxiliary switch. And the traditional knob-type opening and closing is changed to button-type opening and closing. Moreover, the interlocking device is also integrated in this mechanism. The important significance of the present invention is to design the output reverse movement device through a clever internal layout, making the product compact in size and integrating the electrical components together. The electrical components include auxiliary switches, travel switches, counters, and opening and closing coils (electromagnets). Vulnerable electrical components can be replaced without overall disassembly of the operating mechanism. The opening and closing knob method or button method can be selected according to the needs of users.

[0024] It can be seen that the structure of this solution is simple. Through reasonable layout design, the overall structure is made compact, the overall interchangeability is good, and it is more beneficial to realize the standardization of products. It is also more convenient and convenient to use than before, and at the same time, the safety performance is improved, meeting the current market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is an overall schematic diagram of a compact modular switch operating mechanism.

[0027] Figure 2 It is a schematic structural diagram of the arrangement of electrical components.

[0028] Figure 3 It is a schematic structural diagram of the arrangement of the reverse movement device.

[0029] Figure 4 For Figure 2 A cross-sectional view of the button device at E-E in

[0030] Figure 5 It is a schematic diagram of a device for preventing repeated closing.

[0031] Figure 6 It is a schematic diagram of the interlocking device.

[0032] Figure 7 It is a schematic structural diagram of the output shaft assembly.

[0033] Figure 8 It is a schematic structural diagram of the reverse movement shaft assembly. Detailed implementation mode

[0034] Next, in combination with the attached drawings in the embodiments of the present invention Figure 1-8 , the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] Embodiment 1

[0036] As Figures 1 to 3 shown, the compact modular switch operating mechanism of this embodiment includes a fixed seat, a motor driving device, an energy storage device, a tripping device, and a closing device. The front plate 82, the rear plate 2, and five support rods 10 between the two plates together form the fixed seat of this mechanism. An installation area in the middle of the fixed seat is equipped with: a motor driving device 1, an energy storage device 80, a tripping device 55, a closing device 4, and a reverse movement device. Electrical components are respectively installed on the front plate 82 and the rear plate 2: The electrical components include: a travel switch 92, an auxiliary switch 77, a closing and tripping moving contact 6, and a counter 88. The motor driving device 1, the energy storage device 80, the tripping device 55, the closing device 4, the travel switch 92, the closing and tripping moving contact 6, and the auxiliary switch 77 are all prior arts and will not be specifically described. The closing and tripping moving contact 6 has a closing and tripping moving contact 6 in the lower left and a closing and tripping contact in the upper right. When the lower left closing and tripping contact moves, the tripping action is realized; when the upper right closing and tripping contact moves, the closing action is realized.

[0037] The added reverse movement device in this solution includes an output shaft assembly, an output reverse movement shaft assembly, and a connecting plate. The output shaft assembly includes an output shaft 38, an output crank arm 38-3, and a first crank arm 38-2. The output crank arm 38-3 is installed with a roller 41, and the roller 41 is in contact with the surface of the cam 25;

[0038] The output reverse movement shaft assembly includes an output reverse movement shaft 67, an outer joint 67-2, and a second crank arm 40. The first crank arm 38-2 and the second crank arm 40 are movably connected through a connecting plate 69;

[0039] Its operating principle is as follows: (see Figure 3 ) When the motor of the motor driving device 1 is powered on, it will rotate, and the small gear 16 integrated with the motor rotates synchronously. The small gear 16 drives the large gear 27 to rotate, and the cam 25 coaxial with the large gear rotates simultaneously. A first output crank arm 38-3 is welded on the output shaft 38 (see Figure 7), there is a roller 41 on the output toggle arm 38-3, which is in contact with the surface of the cam 25. When the cam rotates from the concave part to the convex part, the roller 41 drives the output toggle arm to rotate the output shaft 38. At this time, the rotation direction is opposite to the rotation direction of the energy storage device 80. In order to obtain the same rotation direction as the energy storage device 80, the present invention adds an output reverse rotation shaft assembly. Through the second toggle arm 40 on the reverse rotation shaft 67 and the transmission of the connecting plate 69, the purpose of the rotation direction opposite to the output shaft is achieved.

[0040] The electrical component integration device, see Figure 2 . The electrical components of the original operating mechanism were installed on the switchgear. In order to achieve compact modularization, the present invention integrates all of them on this mechanism and adds a counter. The auxiliary switch assembly includes a third toggle arm 139, a connecting rod 129, and an auxiliary switch 77. The third toggle arm 139 is connected to the output end 67-1 of the output reverse rotation shaft, driving the fourth toggle arm 137 connected to the auxiliary switch. One end of the connecting rod 129 is connected to the third toggle arm 139, and the other end is connected to the fourth toggle arm 137. The above connections are movable connections. The auxiliary switch is driven to operate to cut off the power supply by the rotation of the output reverse rotation shaft.

[0041] The principle is as follows: When the energy storage device 80 rotates to the completion position, the travel switch 92 is closed (cut off). When the closing electromagnet is turned on, it drives the closing device 48 to release energy to complete the closing. At this time (see Figure 1 ), the third toggle arm 139 on the reverse rotation device drives the fourth toggle arm 137 on the auxiliary switch through the connecting rod 129, driving the auxiliary switch 77 to cut off the power supply. Each time the auxiliary switch operates, the tension spring 134 pulls the counter 88 once. Similarly, when the opening electromagnet 6 is turned on, the opening device 55 is released, and at this time the counter does not operate.

[0042] See Figure 1 and Figure 4 , the opening and closing button devices are divided into an opening button device and a closing button device.

[0043] (1) The opening button device includes an opening button 110, an opening return spring 65, an opening inclined plate 111, an opening roller 114, and an opening lever 115. One end of the opening return spring 65 is installed on the opening button, and the other end is installed on the fixed seat. The opening button is equipped with an opening inclined plate. One end of the opening lever is connected to the opening and closing part of the opening device, and the other end is connected to the opening roller. The opening roller is located below the opening inclined plate. The opening lever swings by pressing the opening button.

[0044] (2) The closing button device and the opening button device have the same structure, which is as follows: the closing button device includes a closing button 120, a closing reset spring, a closing inclined plate 117, a closing roller 118 and a closing lever 119. One end of the closing reset spring is installed on the opening button, and the other end is installed on the fixed seat. The closing button is equipped with a closing inclined plate. One end of the closing lever is connected to the opening and closing part of the closing device, and the other end is connected to the closing roller. The closing roller is located below the closing inclined plate. The closing lever swings by pressing the opening button.

[0045] The working principle is: when the button 110 is pressed inward, the inclined plate 111 on the button pushes the roller 114 to slide downward, and the lever in the middle of the roller releases the opening device. After the action is completed, the spring 65 resets the button device, and the closing button device is the same.

[0046] Regarding the device for preventing repeated closing, the device for preventing repeated closing includes a flexible push rod 71 and a limiting rod 73. The above-mentioned output shaft has an extension mounting portion 38-1 mounted on the rear plate, and the other end 38-4 of the output shaft is mounted on the front plate. The flexible push rod 71 is mounted on the extension mounting portion of the output shaft and rotates therewith. The other end of the flexible push rod 71 is connected to one end of the limiting rod 73. The closing device has an axial end. The other end of the limiting rod is connected to the axial end of the closing device.

[0047] See also Figure 3 , Figure 5 . As described above, the reverse motion device works as follows: when the motor 1 is powered on, it will rotate, and the small gear 16 integrated with the motor will rotate synchronously. The small gear 16 drives the large gear 27 to rotate, and the cam 25 coaxial with the large gear rotates at the same time. Under the rolling of the cam, the output shaft 38 is pushed up to the closing position. At this time (see Figure 5 ) There is a flexible push rod 71 (shaped like a spring) at the end of the output shaft, which presses against the lever 73 at the end of the closing device 48 to prevent it from moving.

[0048] Regarding the interlocking device, the interlocking device includes an interlocking plate 133, a movable limiting rod 116 and a movable arm 121. The middle part of the movable arm is installed on a fixed seat through an axis 121-3 and is divided into a left connecting arm 121-1 and a right connecting arm 121-2. The purpose is that the movable arm can swing around the axis. One end of the interlocking plate 133 is connected to the left connecting arm 121-1, and the movable limiting rod 116 is installed on the adjacent side of the right connecting arm 1. The movable limiting rod is installed on the shaft end of the closing device. The interlocking plate 133 is driven by the interlocking cam of the isolation mechanism (the isolation mechanism is not within the scope of this application). When the isolating switch is in the grounding position, the interlocking cam on the isolation mechanism lifts the interlocking plate 133 upward, and the interlocking plate 133 drives the interlocking plate 121-1. The interlocking plate 121-1 presses against the interlocking plate 116 to achieve the circuit breaker cannot be opened or closed.

[0049] See Figure 2 and Figure 6 . According to the function requirements of the circuit breaker, it is not allowed to close the switch when the disconnecting switch is in the open state. This function is integrated into this modular mechanism in the present invention. When the disconnecting switch is in the open position, the interlocking plate 133 moves upward, driving the crank arm 121 to rotate downward, and pressing against the lever 116 at the shaft end of the closing device 48, making it unable to operate.

[0050] Compared with the prior art, the outstanding progress of the present invention lies in: this compact modular switch operating mechanism is added with a reverse rotation device, making the overall structure simple and compact. The electrical components are integrated into this mechanism as a whole, making the overall mechanism modular. An inclined plate slider device is added to convert the rotary on / off operation of the knob into a push-button on / off operation, making the operation more labor-saving, stable and reliable. It meets the requirements of standardized selection of power transmission and distribution switchgear.

[0051] At the same time, it should be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compact modular switch operating mechanism, comprising a fixed seat, a motor drive device, an energy storage device, a tripping device, and a closing device. The motor drive device, the tripping device, and the closing device are all installed on the fixed seat. Characterized in that: The motor drive device includes a motor, a small gear driven by the motor, and a large gear meshing with the small gear. The energy storage device is installed on the large gear and rotates in the same direction as the large gear. A cam with a coaxial design is installed on the large gear. A reverse movement device is installed on the fixed seat, and the reverse movement device includes an output shaft assembly, an output reverse movement shaft assembly, and a connecting plate. The output shaft assembly includes an output shaft, an output crank arm, and a first crank arm. The output crank arm is equipped with a roller, and the roller is in contact with the surface of the cam. The output reverse movement shaft assembly includes an output reverse movement shaft, an outer joint, and a second crank arm. The first crank arm and the second crank arm are movably connected by a connecting plate. The above-mentioned cam has a concave portion and a convex portion. When the cam rotating with the large gear rotates from the concave portion to the convex portion, the roller drives the output crank arm to rotate the output shaft. At this time, the rotation direction of the output shaft is opposite to the rotation direction of the energy storage device, and it rotates through the transmission of the connecting plate by the second crank arm on the reverse movement shaft. Its rotation direction is opposite to the output shaft and the same as the rotation direction of the above-mentioned energy storage device. The output reverse movement shaft is connected with an auxiliary switch assembly. The auxiliary switch assembly includes a third crank arm, a connecting rod, and an auxiliary switch. The third crank arm is connected to the output end of the output reverse movement shaft and drives a fourth crank arm connected to the auxiliary switch. One end of the connecting rod is connected to the third crank arm, and the other end is connected to the fourth crank arm. The auxiliary switch is driven to operate to cut off the power supply by the rotation of the output reverse movement shaft. It further includes an electrical component integration device, and the electrical component integration device includes a travel switch and a counter assembly. It rotates with the energy storage device to drive the closing or cutting off of the travel switch. The counter assembly includes a counter and a tension spring. One end of the tension spring is connected to the counter, and the other end is connected to the fourth crank arm and is synchronized with the fourth crank arm. When the fourth crank arm rotates once to drive the auxiliary switch once, the tension spring also pulls the counter to count once. The fixed seat includes a front plate and a rear plate. A plurality of support rods are installed between the front plate and the rear plate. An installation area is formed between the front plate and the rear plate, and the above-mentioned motor drive device, tripping device, and closing device are installed in the installation area.

2. A compact modular switch operating mechanism according to claim 1, Characterized in that: The fixed seat is further installed with a tripping and closing button device, and the tripping and closing button device is divided into a tripping button device and a closing button device.

3. A compact modular switch operating mechanism according to claim 2, Characterized in that: The tripping button device includes a tripping button, a tripping return spring, a tripping inclined plate, a tripping roller, and a tripping lever. One end of the tripping return spring is installed on the tripping button, and the other end is installed on the fixed seat. The tripping button is installed with a tripping inclined plate. One end of the tripping lever is connected to the opening and closing part of the tripping device, and the other end is connected to the tripping roller. The tripping roller is located below the tripping inclined plate, and the tripping lever swings by pressing the tripping button.

4. A compact modular switch operating mechanism according to claim 3, characterized in that: The closing button device includes a closing button, a closing return spring, a closing inclined plate, a closing roller and a closing lever. One end of the closing return spring is installed on the opening button, and the other end is installed on the fixed seat. The closing inclined plate is installed on the closing button. One end of the closing lever is connected to the opening and closing part of the closing device, and the other end is connected to the closing roller. The closing roller is located below the closing inclined plate. The closing lever swings by pressing the opening button.

5. A compact modular switch operating mechanism according to claim 3, characterized in that: A locking device is further installed on the fixed seat. The locking device includes a locking plate, a movement limiting rod and a moving arm. The middle part of the moving arm is installed on the fixed seat through a shaft and is divided into a left connecting arm and a right connecting arm. One end of the locking plate is connected to the left connecting arm, and the movement limiting rod is installed adjacent to the right connecting arm. The movement limiting rod is installed on the shaft end of the closing device.

6. A compact modular switch operating mechanism according to claim 3, characterized in that: The fixed seat is further installed with a device for preventing repeated closing. The device for preventing repeated closing includes a flexible ejector rod and a limiting rod. The output shaft has an external installation part. The flexible ejector rod is installed on the external installation part of the output shaft and rotates with it. The other end of the flexible ejector rod is connected to one end of the limiting rod. The closing device has a shaft end, and the other end of the limiting rod is on the shaft end of the closing device.

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