A closing lever arm for an operating mechanism of an electric power mechanism

Abstract

The present invention relates to the technical field of electric closers, and specifically to a closing crank arm of an electric mechanism operating mechanism, comprising a fixed seat, a closing crank arm, an electromagnetic control rod, a locking shaft rod, an arc extinguishing grid and a connecting rod assembly, wherein a first electrode ear and a second electrode ear are fixedly mounted at both ends of the surface of the fixed seat, and an electrode feed sheet is fixedly mounted on the inner side of the fixed seat. In the present invention, through a reasonable linkage component design, the closing crank arm of the electric mechanism can easily achieve the closing and opening operations under the joint action of the electromagnetic control rod and the locking shaft rod, and manual operation and remote electric control are compatible, thereby enhancing the flexibility of operation. Through the coordinated design of spring force and multiple connectors, force balance in different states is ensured, effectively avoiding misoperation. At the same time, the contact design between the electrode ear and the electrode feed sheet ensures stable current connectivity.

Description

Technical Field

[0001] The invention relates to the technical field of electric closers, in particular to a closing crank arm of an electric mechanism operating mechanism. Background Art

[0002] The closing lever structure in the traditional power mechanism operating mechanism plays a key role in power equipment and is mainly used to realize closing and opening operations. The existing closing lever usually includes a fixed seat, a connecting shaft, an operating rod and a spring. These components realize the contact or separation between the electrodes through mechanical linkage, thereby realizing the on-off control of the current. However, the traditional closing lever structure has the following obvious disadvantages:

[0003] The traditional closing crank structure design is relatively complex, involving the linkage of multiple mechanical parts. Especially during the closing and opening process, multiple connection points and rotating parts must be highly coordinated, which makes the operation difficult. In addition, manual operation is cumbersome, which increases the difficulty of maintaining power equipment. Most traditional closing cranks rely on manual operation to complete the closing and opening actions, and lack remote control functions. Operators must arrive at the site to complete the operation manually, and remote monitoring and control cannot be achieved, which affects the automation level and emergency handling capabilities of the power system. In addition, traditional closing cranks usually lack efficient temperature monitoring and automatic protection devices, and cannot automatically open the circuit under high temperature or short circuit conditions. This design without temperature perception may cause the equipment to overheat or the arc to continue burning, increasing the risk of failure.

[0004] In view of this, research and improvement are carried out on the existing problems, and a closing crank arm of the operating mechanism of an electric power mechanism is provided to solve certain limitations of the closing crank arm of the operating mechanism of the electric power mechanism in terms of operational convenience, degree of automation, safety, etc. The purpose is to achieve the purpose of solving problems and improving practical value through this technology. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted by the present invention is: a closing crank arm of an electric power mechanism operating mechanism, comprising: a fixed seat, a closing crank arm, an electromagnetic control rod, a locking shaft rod, an arc extinguishing grid and a connecting rod assembly, the first electrode ear and the second electrode ear are fixedly installed at both ends of the surface of the fixed seat, and the electrode feed sheet is fixedly installed on the inner side of the fixed seat, the locking shaft rod and the closing crank arm are rotatably installed on the surface of the fixed seat, the surface of the locking shaft rod is fixedly installed with a lifting ear and an eccentric ear, and the surfaces of the closing crank arm and the lifting ear are respectively connected with a return spring and a pull ear spring, the other ends of the return spring and the pull ear spring are movably connected to the surface of the fixed seat, the electromagnetic control rod is fixedly installed on the surface of the fixed seat and the output end faces the surface of the eccentric ear, the locking shaft rod is rotatably installed on the surface of the fixed seat and one end is rotatably sleeved on one end of the first electrode ear;

[0007] A brake is rotatably installed on the surface of the fixed seat, and the bottom end of the brake is in abutment with the side of the lock shaft rod. An unlocking groove is provided on the surface of the lock shaft rod. The connecting rod assembly includes a touch-pressure rod, a first connecting rod and a second connecting rod. One end of the first connecting rod and the second connecting rod is provided with a turn pin and is rotatably connected to each other. The other end of the first connecting rod and the second connecting rod is respectively rotatably connected to the surface of the brake and the closing crank arm. The surface of the closing crank arm is provided with a pressure arm, which is used to abut against the surface of the electrode feed sheet. Through the coordinated action of multiple components, the precise realization of closing and opening operations is ensured, especially through the cooperation of the electromagnetic control rod and the connecting rod assembly, the operating stability and automation level of the mechanism are improved.

[0008] In a preferred example, the present invention can be further configured as follows: the electrode feed plate is an elastic metal sheet structure, and the surface of the electrode feed plate is provided with a pressure contact point in contact with the surface of the second electrode ear. When the closing arm is deflected, the pressure arm presses the electrode feed plate down to make the electrode feed plate elastically bend and contact with the surface of the second electrode ear. Through the design of the elastic metal sheet structure, the electrode feed plate can be flexibly bent under the action of the pressure arm, thereby achieving stable electrical contact, ensuring the smooth passage of current, and avoiding the generation of electric sparks caused by poor contact.

[0009] In a preferred example, the present invention can be further configured as follows: the surfaces of the first electrode ear and the second electrode ear are both provided with screws for connecting to external cables, which are used to connect to the cables to ensure that the electrical connection between the cable and the mechanism is more firm and reliable, prevent the connection from loosening, and ensure the electrical stability of the system.

[0010] In a preferred example, the present invention can be further configured as follows: the arc extinguishing grid is fixed to one side of the fixing seat and is sleeved on the surface of the second electrode ear and the electrode feed sheet, and the arc extinguishing grid is used to eliminate arcs and sparks during the contact process between the pressure arm, the second electrode ear and the surface of the electrode feed sheet, effectively eliminating arcs and sparks that may be generated during the closing or opening process, avoiding damage to electrical components, and improving the safety and life of the electrical system.

[0011] In a preferred example, the present invention can be further configured as follows: the touch-pressure rod includes an operating button, a sleeve ear and a guide rod fixedly connected in sequence, the guide rod slides through the inner side of the fixed seat, and a spring is sleeved on the surface of the guide rod, the spring abuts against the surface of the sleeve ear and the fixed seat, and the connection point of the first connecting rod and the second connecting rod is slidably sleeved on the inner side of the sleeve ear.

[0012] In a preferred example, the present invention can be further configured as follows: a memory spring is fixedly connected to the surface of the ear sleeve, the surface of the memory spring is in contact with the surface of the fixing seat, and the fixing seat is an insulating ceramic component. The design of the memory spring can help restore the system to its initial state after the closing or opening operation is completed. At the same time, the use of insulating ceramic materials improves the electrical insulation performance of the equipment and ensures the safe operation of the system.

[0013] In a preferred example, the present invention can be further configured as follows: the electromagnetic control rod is an electric push rod structure, the input end of the electromagnetic control rod is electrically connected to a control system, and the input end of the control system is electrically connected to a remote communication module, and the remote communication module is one of NB-lot and GPRS communication modules. The electric push rod structure is combined with the remote communication module, so that the closing arm has remote control and automatic operation capabilities, realizing accurate opening or closing operations in remote situations, greatly improving the convenience and intelligence level of operation.

[0014] In a preferred example, the present invention can be further configured as follows: the connection point between the lifting ear and the pulling ear spring and the contact point between the offset ear and the electromagnetic control rod are offset from the axis of the locking shaft rod.

[0015] The beneficial effects achieved by the present invention are:

[0016] 1. In the present invention, through reasonable linkage component design, the closing arm of the power mechanism can easily realize the closing and opening operations under the joint action of the electromagnetic control rod and the locking shaft rod. Both manual operation and remote electric control are compatible, which enhances the flexibility of operation.

[0017] 2. In the present invention, the spring force and the multiple connectors are designed to ensure force balance in different states, effectively avoiding misoperation. At the same time, the contact design between the electrode ear and the electrode feed sheet ensures stable current connection.

[0018] 3. The present invention has a remote control function, and can realize the circuit breaker operation remotely through NB-IoT, GPRS, Wi-Fi or 4G / 5G communication module, thereby improving the automation level and emergency response capability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the connection structure of a closing crank arm and a locking shaft rod according to an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of an arc extinguishing grid structure according to an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the installation structure of a connecting rod assembly according to an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a closing lever structure according to an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a shaft lock rod and a brake structure according to an embodiment of the present invention;

[0025] Figure 7 The figure is a schematic structural diagram of a connecting rod assembly according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] 1. Fixed seat; 2. Closing arm; 3. Electromagnetic control rod; 4. Locking shaft rod; 5. Arc extinguishing grid; 6. Linkage assembly; 7. Brake;

[0028] 11. First electrode ear; 12. Second electrode ear; 13. Electrode feed sheet; 21. Pressure arm; 22. Return spring; 41. Unlocking slot; 42. Lifting ear; 43. Pulling ear spring; 44. Off-axis ear; 61. Touch-pressure rod; 62. First connecting rod; 63. Second connecting rod; 611. Operating button; 612. Sleeve ear; 613. Guide rod; 614. Memory spring. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0030] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0031] A closing lever arm of an electric power mechanism operating mechanism provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0032] Combination Figure 1-Figure 7As shown, a closing crank arm of an electric power mechanism operating mechanism provided by the present invention comprises key components such as a fixed seat 1, a closing crank arm 2, an electromagnetic control rod 3, a locking shaft rod 4, an arc extinguishing grid 5 and a connecting rod assembly 6. Specifically, a first electrode ear 11 and a second electrode ear 12 are fixedly installed at both ends of the surface of the fixed seat 1, and an electrode feed sheet 13 is fixedly installed on the inner side of the fixed seat 1. Among them, the locking shaft rod 4 and the closing crank arm 2 are rotatably installed on the surface of the fixed seat 1. A lifting ear 42 and an eccentric ear 44 are fixedly installed on the surface of the locking shaft rod 4, and a return spring 22 and a pull ear spring 43 are connected to the surfaces of the closing crank arm 2 and the lifting ear 42, respectively. In addition, the other ends of the return spring 22 and the pull ear spring 43 are movably connected to the surface of the fixed seat 1. The electromagnetic control rod 3 is fixedly installed on the surface of the fixed seat 1, and the output end faces the surface of the eccentric ear 44, so as to realize the closing control function. The locking shaft rod 4 is rotatably installed on the surface of the fixed seat 1, and one end is rotatably sleeved on one end of the first electrode ear 11 to form a stable mechanical connection.

[0033] At the same time, a brake 7 is rotatably mounted on the surface of the fixed seat 1, and its bottom end abuts against the side of the lock shaft rod 4. An unlocking groove 41 is provided on the surface of the lock shaft rod 4, and the working state of the linkage device can be adjusted by an unlocking action during operation. The connecting rod assembly 6 includes a contact pressure rod 61, a first connecting rod 62 and a second connecting rod 63, wherein one end of the first connecting rod 62 and the second connecting rod 63 are rotatably connected to each other through a turn pin, and a linkage operation is achieved through the action of torque. The other ends of the first connecting rod 62 and the second connecting rod 63 are rotatably connected to the surfaces of the brake 7 and the closing crank arm 2, respectively. A pressure arm 21 is provided on the surface of the closing crank arm 2, which is used to perform contact operation with the electrode feed sheet 13 to achieve electrical connection and mechanical linkage.

[0034] Under normal working conditions of the power equipment, the current is closed through the above-mentioned mechanical and electrical connection components. However, during the process of current passing, due to the temperature conduction between the fixed seat 1 and the surface of the memory spring 614, when the current is short-circuited or the equipment is overheated, the contact point between the lock shaft rod 4 and the brake 7, the contact point between the pressure arm 21 and the electrode feed sheet 13, and the contact point between the second electrode ear 12 and the electrode feed sheet 13 will all experience high temperature effects. At this time, the high temperature is conducted to the memory spring 614 through the fixed seat 1, causing the memory spring 614 to deform, pushing the touch pressure rod 61 up, and breaking the force balance between the first connecting rod 62 and the second connecting rod 63. The system enters an automatic tripping protection state to avoid damage to the equipment due to overload or overheating, thereby ensuring the safety of the equipment.

[0035] The electromagnetic control rod 3 in the present invention is an electric push rod structure, and its input end is remotely controlled by electrically connecting the control system. The input end of the control system can communicate with a remote communication module, and the remote communication module can be one or more of NB-IoT, GPRS, Wi-Fi or 4G / 5G communication modules to achieve remote closing or breaking operations. In the event of an emergency, the operator can quickly execute the breaking command through the remote communication module to ensure the safe operation and remote management capabilities of the power equipment, greatly improving the automation level and emergency response speed of the system.

[0036] During the closing and opening process of the power equipment, arcs and sparks are easily generated at the contact point due to the high voltage difference between the electrodes, which will affect the safety and life of the equipment. The present invention fixes the arc extinguishing grid 5 on one side of the fixing seat 1 and sleeves it on the surface of the second electrode ear 12 and the electrode feed sheet 13 to eliminate the arcs and sparks generated when the pressure arm 21, the second electrode ear 12 and the electrode feed sheet 13 are in contact. The design of the arc extinguishing grid 5 can effectively absorb and dissipate these arcs, ensure electrical safety during closing and opening operations, prevent electric sparks from damaging the equipment, and extend the service life of the equipment.

[0037] Furthermore, the touch-pressure rod 61 is fixedly connected in sequence by an operating button 611, a sleeve ear 612 and a guide rod 613, wherein the guide rod 613 slides through the inner side of the fixing seat 1, and a spring is sleeved on the surface. The spring abuts against the sleeve ear 612 and the surface of the fixing seat 1, thereby ensuring the flexibility and stability of the system during operation.

[0038] The connection point between the first connecting rod 62 and the second connecting rod 63 is slidably sleeved on the inner side of the sleeve ear 612, thereby ensuring the smooth operation of each component during the closing and opening process.

[0039] The memory spring 614 abuts against the surface of the fixing seat 1 , which can trigger a protection mechanism under high temperature conditions to improve the safety of the device.

[0040] The working principle and use process of the present invention:

[0041] In the open-circuit state, the first connecting rod 62 and the second connecting rod 63 maintain a V-shaped connection state, and the pressure rod 61 is lifted up by the spring on the surface of the guide rod 613, so that the closing lever 2 maintains the initial angle state and its surface pressure arm 21 is separated from the contact with the surface of the electrode feed sheet 13, that is, the second electrode ear 12 and the electrode feed sheet 13 are not in contact, and at the same time, the bottom end of the brake 7 is located on the inner side of the unlocking groove 41 on the surface of the lock shaft rod 4, and the brake 7 is not in contact with the surface of the unlocking groove 41, so the surface electrodes of the first electrode ear 11 and the second electrode ear 12 are not electrically connected;

[0042] During the closing operation, the first connecting rod 62 and the second connecting rod 63 are deflected by manually pressing the contact rod 61, and the closing crank arm 2 and the brake 7 are deflected synchronously. Then, the pressure arm 21 on the closing crank arm 2 contacts the surface of the electrode feed sheet 13, so that the electrode feed sheet 13 is further elastically bent and contacts the surface of the second electrode ear 12. After the brake 7 is reversed, the bottom end is separated from the surface of the unlocking groove 41, and synchronously retreats through the electromagnetic control rod 3. Under the tensile action of the pull ear spring 43, the eccentric ear 44 is pulled back. The lock shaft rod 4 deflects and moves, and the bottom end of the brake lever 7 is separated from the inner side of the unlocking groove 41 and abuts against one side of the lock shaft rod 4; the touch-pressure rod 61 is pressed until the memory spring 614 abuts against the surface of the fixing seat 1, and the first connecting rod 62 and the second connecting rod 63 are in the same straight line, and multiple forces are balanced. When this state is maintained, the current passes through the first electrode ear 11, the lock shaft rod 4, the brake lever 7, the first connecting rod 62, the second connecting rod 63, the closing arm 2, the electrode feed sheet 13 and the second electrode ear 12 for electrode communication;

[0043] Under the control of the circuit breaker, the electromagnetic control rod 3 can be extended through the remote control module, and its output end pushes the surface of the eccentric ear 44 to make the lock shaft rod 4 deflect until the bottom end of the brake lever 7 abuts against the side of the lock shaft rod 4 and is released through the inner side of the unlocking groove 41. The deflection movement of the brake lever 7 causes the force balance state of the first connecting rod 62 and the second connecting rod 63 to be unbalanced, and the contact pressure rod 61 is lifted under the action of the spring on the surface of the guide rod 613. The return spring 22 synchronously pulls the closing crank arm 2 to deflect, so that the pressure arm 21 is separated from the surface contact of the electrode feed sheet 13 to achieve circuit breaker.

[0044] In the process where the closing current passes through, under the effect of temperature conduction between the fixed seat 1 and the surface of the memory spring 614, when the current is short-circuited or in a high temperature state, the high temperature effect generated at the contact points of the lock shaft rod 4 and the brake 7, the contact points of the pressure arm 21 and the electrode feed sheet 13, and the contact points of the second electrode ear 12 and the electrode feed sheet 13 is transmitted to the memory spring 614 through the fixed seat 1, and the memory spring 614 is deformed by the high temperature, and the lifting force pushes the contact pressure rod 61, breaking the force balance state of the first connecting rod 62 and the second connecting rod 63, thereby achieving circuit breaker disconnection.

[0045] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A closing lever arm of an electric power mechanism operating mechanism, characterized in that: include: A fixed seat (1), a closing crank arm (2), an electromagnetic control rod (3), a locking shaft rod (4), an arc extinguishing grid (5) and a connecting rod assembly (6); a first electrode ear (11) and a second electrode ear (12) are fixedly mounted on both ends of the surface of the fixed seat (1), and an electrode feed sheet (13) is fixedly mounted on the inner side of the fixed seat (1); the locking shaft rod (4) and the closing crank arm (2) are rotatably mounted on the surface of the fixed seat (1); and a lifting ear (42) and an offset ear (43) are fixedly mounted on the surface of the locking shaft rod (4). 44), and the surfaces of the closing lever arm (2) and the lifting ear (42) are respectively connected to a return spring (22) and a pull ear spring (43), the other ends of the return spring (22) and the pull ear spring (43) are movably connected to the surface of the fixing seat (1), the electromagnetic control rod (3) is fixedly mounted on the surface of the fixing seat (1) and the output end faces the surface of the eccentric ear (44), and the locking shaft rod (4) is rotatably mounted on the surface of the fixing seat (1) and one end is rotatably sleeved on one end of the first electrode ear (11); A brake (7) is rotatably mounted on the surface of the fixing seat (1), the bottom end of the brake (7) abuts against the side of the lock shaft rod (4), the surface of the lock shaft rod (4) is provided with an unlocking groove (41), the connecting rod assembly (6) comprises a touch-pressure rod (61), a first connecting rod (62) and a second connecting rod (63), one end of the first connecting rod (62) and the second connecting rod (63) are provided with a rotating pin and are rotatably connected to each other, the other ends of the first connecting rod (62) and the second connecting rod (63) are respectively rotatably connected to the surfaces of the brake (7) and the closing crank arm (2), the surface of the closing crank arm (2) is provided with a pressure arm (21), and the pressure arm (21) is used to abut against the surface of the electrode feed sheet (13); The touch-pressure rod (61) comprises an operating button (611), a sleeve ear (612) and a guide rod (613) which are fixedly connected in sequence. The guide rod (613) slides through the inner side of the fixing seat (1), and a spring is sleeved on the surface of the guide rod (613). The spring abuts against the surfaces of the sleeve ear (612) and the fixing seat (1). The connection point between the first connecting rod (62) and the second connecting rod (63) slides on the inner side of the sleeve ear (612).

2. A closing lever arm of an electric power mechanism operating mechanism according to claim 1, characterized in that: The electrode feed sheet (13) is an elastic metal sheet structure, and a pressure contact point that contacts the surface of the second electrode ear (12) is provided on the surface of the electrode feed sheet (13). When the closing arm (2) is deflected, the pressure arm (21) presses down the electrode feed sheet (13) so that the electrode feed sheet (13) is elastically bent and contacts the surface of the second electrode ear (12).

3. The closing lever arm of the electric power mechanism operating mechanism according to claim 1, characterized in that: The surfaces of the first electrode lug (11) and the second electrode lug (12) are both provided with screws for connecting to external cables.

4. The closing lever arm of the electric power mechanism operating mechanism according to claim 1, characterized in that: The electromagnetic control rod (3) is controlled by a remote control module, the remote control module comprising a communication module and a controller, the communication module being used to receive remote operation instructions, the controller controlling the telescopic movement of the electromagnetic control rod (3) according to the received instructions, thereby realizing remote closing or opening operations, the communication module being one or more of NB-IoT, GPRS, Wi-Fi or 4G / 5G communication modules.

5. The closing lever arm of the electric power mechanism operating mechanism according to claim 1, characterized in that: The arc extinguishing grid (5) is fixed to one side of the fixing seat (1) and sleeved on the surfaces of the second electrode ear (12) and the electrode feed sheet (13); the arc extinguishing grid (5) is used to eliminate arcs and electric sparks during the contact process between the pressure arm (21), the second electrode ear (12) and the electrode feed sheet (13).

6. A closing lever arm of an electric power mechanism operating mechanism according to claim 5, characterized in that: A memory spring (614) is fixedly connected to the surface of the sleeve ear (612), and the surface of the memory spring (614) abuts against the surface of the fixing seat (1), and the fixing seat (1) is a component made of insulating ceramic material.

7. The closing lever arm of the electric power mechanism operating mechanism according to claim 1, characterized in that: The connection point between the lifting ear (42) and the pulling ear spring (43) and the contact point between the offset ear (44) and the electromagnetic control rod (3) are offset from the axis of the locking shaft rod (4).

Images