Load switch electric operating device

Abstract

The present invention discloses an electric operating device for a load switch, comprising: a bracket assembly; a motor assembly, mounted on the bracket assembly; a speed gear assembly, mounted on the bracket assembly and drivingly connected to the motor assembly, the speed gear assembly drivingly connected to an output shaft; a cam, slidably sleeved on the output shaft; a drive shaft, inserted through the cam at one end away from the output shaft; a driving member, fixedly connected to the output shaft, the driving member protruding outwardly extends to have a toggle portion for abutting and driving the drive shaft; a drive rod, one end of the drive rod is rotatably sleeved on the drive shaft, and the other end of the drive rod is provided with an elongated hole; and a connecting member, one end of which is connected to a pin shaft, the pin shaft is inserted into the elongated hole, and the other end is provided with a coupling structure suitable for being fixedly connected to the switch operating shaft of the load switch. The electric operating device for a load switch of the present invention realizes the electric closing and opening function without changing the manual function of the load switch, and has a small size and a simple structure.

Description

Technical Field

[0001] The invention relates to an electric operating device for a load switch. Background Art

[0002] The load switch cabinet is a device for closing or disconnecting loads in the domestic 10KV (or 20KV) distribution network. Its common operation method is: insert the operating handle into the load switch operating shaft, rotate the operating handle, and the load switch operating shaft compresses (or stretches) the energy storage spring of the load switch to store energy as the operating handle rotates; when the energy storage spring is released, the load switch is quickly closed (or disconnected). Due to the large operating force, the operating handle must be long and the operator needs to have greater strength.

[0003] With the rapid growth of power supply areas and the increasing requirements of users for power supply reliability, the traditional manual operation method can no longer meet the requirements. The power supply bureau can use the distribution network automation system to close or disconnect the remote load switch cabinet on the computer. To achieve this function, the load switch cabinet must be equipped with an electric operating device on the basis of the original handle manual operation. The electric operating device can electrically close and open the load switch when operating, and the electric operating device can be reliably disengaged when the handle is manually operated, without affecting the manual operation of the handle. Summary of the invention

[0004] The main purpose of the present invention is to provide an electric operating device for a load switch, aiming to realize the integration of manual operation and electric operation of the load switch, and the electric operating device is disengaged during manual operation, so that the operation is convenient.

[0005] To achieve the above-mentioned purpose, the load switch electric operating device proposed in the present invention comprises:

[0006] Bracket assembly;

[0007] A motor assembly, wherein the motor assembly is mounted on the bracket assembly;

[0008] A speed change gear assembly, the speed change gear assembly is mounted on the bracket assembly and is drivingly connected to the motor assembly, and the speed change gear assembly is drivingly connected to an output shaft;

[0009] A cam, wherein the cam is slidably sleeved on the output shaft;

[0010] A driving shaft, the driving shaft being inserted through an end of the cam away from the output shaft;

[0011] A driving member, the driving member is fixedly connected to the output shaft, and the driving member protrudes outward to form a shifting portion for abutting against and driving the driving shaft;

[0012] A driving rod, one end of which is rotatably sleeved on the driving shaft, and the other end of the driving rod away from the driving shaft is provided with an elongated hole; and

[0013] A connecting piece, one end of which is connected with a pin shaft, the pin shaft is inserted into the elongated hole, and the other end of the connecting piece is provided with a connecting shaft structure suitable for being fixedly connected to the switch operating shaft of the load switch.

[0014] Optionally, the distance from the rotation center of the output shaft to the rotation center of the drive shaft is defined as A, the distance from the rotation center of the drive shaft to the center of the elongated hole is defined as B, and the distance from the center of the elongated hole to the center of the coupling structure is defined as C, wherein C<A<B.

[0015] Optionally, define A=L, where A / B / C is: L / (3L+3.5) / (L-1).

[0016] Optionally, the driving rod has a curved structure and includes a first section that is arched in a first direction and a second section that is arched in a second direction opposite to the first direction.

[0017] Optionally, the driving rod further includes reinforcing ribs extending on the first section and the second section.

[0018] Optionally, a first sleeve is fixed on the output shaft, and the cam is slidably sleeved outside the first sleeve.

[0019] Optionally, a waist-shaped boss is formed on the output shaft, a waist-shaped hole is opened in the middle of the driving member, and the waist-shaped boss is adapted to be inserted into the waist-shaped hole.

[0020] Optionally, the bracket assembly comprises:

[0021] a first support plate;

[0022] a second support plate, disposed opposite to the first support plate; and

[0023] A support rod, two ends of which are respectively fixed to the first support plate and the second support plate;

[0024] The speed change gear assembly is installed between the first support plate and the second support plate.

[0025] Optionally, the speed change gear assembly includes two or more speed change gears meshing with each other.

[0026] Optionally, the load switch operating device further comprises a control circuit electrically connected to the motor assembly, and the control circuit controls the operation of the motor assembly.

[0027] The technical solution of the present invention is to design the load switch electric operating device as a driving source composed of a motor assembly and a speed change gear assembly, and realize the closing and opening operations of the switch operating shaft of the load switch under power-on conditions through a crank connecting rod mechanism composed of a cam, a driving member, a driving rod and a connecting member, and the cam is slidably sleeved on an output shaft that is transmission-connected to the speed change gear assembly. In this way, when the switch operating shaft of the load switch is manually rotated to switch between the closing state and the opening state in the case of power failure, the cam will be in the crank connecting rod mechanism composed of the cam, the driving member, the driving rod and the connecting member. The load switch operating device of the present invention swings between the two dead points of the structure, and the output shaft does not interact with the cam, so that when the power is off, the resistance of the motor assembly and the speed change gear assembly encountered when the switch operating shaft is manually operated is almost zero, so the switch operating shaft of the load switch can be easily operated in the case of a power outage, and because the clutch mechanism during the operation of the switch operating shaft is realized by the crank-connecting rod mechanism composed of the cam, the driving member, the driving rod and the connecting member, the entire structure is flattened and occupies very little space, which is very suitable for use in load switch cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of an embodiment of an electric operating device for a load switch according to the present invention from one perspective;

[0030] Figure 2 for Figure 1 Schematic diagram of the structure of the electric operating device of the medium load switch from another perspective;

[0031] Figure 3 for Figure 1 Schematic diagram of the internal structure of the medium load switch electric operating device after removing the second support plate;

[0032] Figure 4 for Figure 1 Schematic diagram of the exploded structure of the medium load switch electric operating device from one perspective

[0033] Figure 5 for Figure 1 Schematic diagram of the exploded structure of the electric operating device of the medium load switch from another perspective;

[0034] Figure 6 for Figure 1Actuating rod for electric operating device of medium load switch.

[0035] Description of Figure Numbers:

[0036]

[0037]

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] The present invention provides an electric operating device 600 for a load switch.

[0044] Please refer to Figures 1 to 6 The load switch electric operating device 600 includes a bracket assembly 100, a motor assembly 200, a speed change gear assembly 300, and a crank connecting rod mechanism 400.

[0045] The bracket assembly 100 includes a first support plate 110 and a second support plate 120 that are relatively spaced apart, and a support rod located between the first support plate 110 and the second support plate 120, the two ends of the support rod are respectively fixedly connected to the first support plate 110 and the second support plate 120, and the first support plate 110 and the second support plate 120 are locked by screws or bolts, and an accommodating space is formed between the first support plate 110 and the second support plate 120, the speed change gear assembly 300 is installed on the bracket assembly 100 and is located in the accommodating space, the motor assembly 200 is installed on the outside of the first support plate 110 in the bracket assembly 100, and the motor assembly 200 includes a motor bracket 220 and a drive motor 210, the motor bracket 220 is fixed to the first support plate 110 by screws, and the drive motor 210 is fixed to the first support plate 110 by the motor bracket 220. The crank-connecting rod mechanism 400 is installed on the outside of the second support plate 120. At the same time, a mounting plate 121 is connected to the edge of the second support plate 120. The mounting plate 121 is provided with mounting holes. The mounting plate 121 is suitable for fixing the entire load switch electric operating device of the present application to the load switch cabinet.

[0046] The speed change gear assembly 300 includes two or more speed change gears. The speed change gear assembly 300 of the present application has four speed change gears, including a first gear 310, a second gear 320, a third gear 330 and a fourth gear 340. The four speed change gears are meshed in sequence, wherein an output shaft 350 is installed at the center of the fourth gear 340, and a driving member 360 is also fixed on the output shaft 350. The driving member 360 of the present application is a plate-like structure, and a waist-shaped hole 362 is opened in the middle of the driving member 360, and a waist-shaped boss 351 is integrally formed on the output shaft 350. The waist-shaped boss 351 can be adapted to be inserted into the waist-shaped hole 362, so that the driving member 360 can rotate synchronously with the output shaft 350, and the installation structure is relatively firm. A driving gear 211 is installed on the motor shaft of the driving motor 210, and the driving gear 211 is a spline gear, and the driving gear 211 is meshed with the first gear 310. In order to generate a larger torque, the present application drives the large gear in a manner where a small gear drives the large gear, that is, the pitch circles of the first gear 310, the second gear 320, the third gear 330 and the fourth gear 340 mentioned above increase successively, thereby allowing the fourth gear 340 and the output shaft 350 to transmit a larger torque.

[0047] The crank-connecting rod mechanism 400 includes a cam 410, a drive shaft 420, a drive rod 430 and a connecting member 440. The cam 410 is a plate-like structure and its projection on the horizontal plane is in the shape of a water drop. The cam 410 is provided with a center hole 411 and an edge hole 412 spaced apart from each other. In the present application, a first sleeve 450 is further installed on the output shaft 350. The first sleeve 450 has a barrel portion fixedly connected to the output shaft 350 and a skirt extending outward from the upper edge of the barrel portion. The cam 410 is sleeved on the outer periphery of the first sleeve 450 through the center hole 411 so that it can slide and rotate relative to the output shaft 350, and the skirt is pressed on the surface of the cam 410 away from the second support plate 120 so that the cam 410 will not fall off. The driving shaft 420 is inserted through the edge hole 412 of the cam 410 away from the output shaft 350. The edge of the driving member 360 mentioned in the present application also protrudes outward and extends to have a toggle portion 361, and the driving member 360 is located between the second support plate 120 and the cam 410, wherein the toggle portion 361 can abut against one end of the driving shaft 420 facing the second support plate 120. One end of the driving rod 430 is rotatably sleeved on one end of the driving shaft 420 extending out of the cam 410, and the other end of the driving rod 430 away from the driving shaft 420 is provided with an elongated hole 433. Specifically, the driving shaft 420 of the present application is a screw, and is provided with a second sleeve 370, which is fixedly mounted on the screw. One end of the driving rod 430 is sleeved on the outside of the second sleeve 370 with reference to the installation method of the cam 410 to achieve its rotation. One end of the connecting member 440 is connected to a pin shaft 441, which is inserted into the elongated hole 433. The other end of the connecting member 440 is provided with a coupling structure suitable for being fixedly connected to the switch operating shaft of the load switch, wherein the coupling structure is a shaft sleeve 442, which can be adapted and fixed to the switch operating shaft of the load switch, and when the rotation of the driving motor 210 is transmitted to the output shaft 350 and drives the driving member 360 to rotate, the toggle portion 361 will realize the movement of the entire crank-connecting rod mechanism 400 by pushing the driving shaft 420, and the shaft sleeve 442 will drive the switch operating shaft to move, thereby realizing the opening and closing actions of the load switch.

[0048] There are two dead point extreme positions in the movement of the crank-connecting rod mechanism 400. The driving motor 210 of the present application is unidirectionally rotating. An elongated hole 433 is provided at the other end of the driving rod 430 away from the driving shaft 420, so that the pin 441 can move in the elongated hole 433, so that the crank-connecting rod mechanism 400 passes through the dead point position, and the opening and closing positions of the switch shaft of the load switch are between the two dead point positions. Furthermore, two position detection switches are installed in the accommodating space of the bracket assembly 100, and the load switch electric The dynamic operating device 600 also includes a control circuit electrically connected to the driving motor 210 in the motor assembly 200, and the control circuit controls the operation of the motor assembly 200. A guide curved surface is also convexly provided on the outer wall surface of the output shaft 350 located in the accommodating space, and position points corresponding to the opening and closing positions of the switch operating shaft are provided on the guide curved surface. A control signal is generated by detecting the contact and cooperation between the switch and the opening and closing position points of the switch operating shaft corresponding to the guide curved surface, and the start and stop of the electric drive process at the opening position and the closing position are precisely controlled by the control circuit.

[0049] The technical solution of the present invention is to design the load switch electric operating device 600 as a driving source composed of a motor assembly 200 and a speed change gear assembly 300, and realize the closing and opening operations of the switch operating shaft of the load switch under power-on conditions through a crank connecting rod mechanism 400 composed of a cam 410, a driving member 360, a driving rod 430 and a connecting member 440, and the cam 410 is slidably sleeved on an output shaft 350 that is transmission-connected to the speed change gear assembly 300. In this way, when the switch operating shaft of the load switch is manually rotated to switch between the closing state and the opening state in the case of power failure, the cam 410 will be in the crank connecting rod mechanism composed of the cam 410, the driving member 360, the driving rod 430 and the connecting member 440. The crank-connecting rod mechanism 400 formed by 40 swings between the two dead points, and the output shaft 350 will not be linked with the cam 410, so that when the load switch electric operating device 600 of the present application is powered off, the resistance of the motor, gears and other parts when manually operating the switch operating shaft is almost zero, so the switch operating shaft of the load switch can be easily operated in the power off state. In addition, since the crank-connecting rod mechanism 400 composed of the cam 410, the driving member 360, the driving rod 430 and the connecting member 440 realizes the clutch mechanism during the operation of the switch operating shaft, the entire structure is flattened and occupies very little space, which is very suitable for use in load switch cabinets.

[0050] Please refer to Figure 4Furthermore, the load switch electric operating device 600 of the present application defines that the distance from the rotation center of the output shaft 350 to the rotation center of the drive shaft 420 is defined as A, the distance from the rotation center of the drive shaft 420 to the center of the elongated hole 433 is defined as B, and the distance from the center of the elongated hole 433 to the center of the sleeve 442 is defined as C, wherein C<A<B, that is, by using the connecting member 440 as the rocker as the shortest rod, a larger torque is achieved during the electric drive of the switch shaft.

[0051] In an optional embodiment of the present application, the length of A is defined as L, where A / B / C is: L / (3L+3.5) / (L-1). The unit of L can be millimeters, and the length tolerance is ±1. By setting the above ratios, it can be ensured that the entire device has a large torque during the driving process, passes the dead point position smoothly and runs smoothly. It can be understood that the above ratios are only provided as an example of a preferred embodiment. In actual application, the above ratios can be slightly adjusted.

[0052] Please refer to Figure 6 Furthermore, in order to provide a larger output torque and stable operation during driving, the driving rod 430 of the present application is bent and includes a first section 434 that is arched in a first direction and a second section 435 that is arched in a second direction opposite to the first direction. The present application configures the driving rod 430 to have a special-shaped structure, wherein the first section 434 and the second section 435 are configured to be roughly hook-shaped. Of course, in other embodiments, the first section 434 and the second section 435 can also be configured to be other shapes such as S-shaped, L-shaped, etc. This allows the entire crank-connecting rod mechanism 400 to have a large output torque during driving, a large structural strength, and smooth operation.

[0053] In order to further improve the structural strength, the driving rod 430 of the present application further includes reinforcing ribs 431 extending on the first section 434 and the second section 435 .

[0054] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A load switch electric operating device, characterized in that: include: Bracket assembly; A motor assembly, wherein the motor assembly is mounted on the bracket assembly; A speed change gear assembly, the speed change gear assembly is mounted on the bracket assembly and is drivingly connected to the motor assembly, and the speed change gear assembly is drivingly connected to an output shaft; A cam, wherein the cam is slidably sleeved on the output shaft; A driving shaft, the driving shaft being inserted through an end of the cam away from the output shaft; A driving member, the driving member is fixedly connected to the output shaft, and the driving member protrudes outward to form a shifting portion for abutting against and driving the driving shaft; A driving rod, one end of which is rotatably sleeved on the driving shaft, and the other end of the driving rod away from the driving shaft is provided with a long hole; as well as A connecting piece, one end of which is connected to a pin, the pin is inserted into the elongated hole, and the other end of the connecting piece is provided with a connecting shaft structure suitable for being fixedly connected to a switch operating shaft of the load switch; Define the distance from the rotation center of the output shaft to the rotation center of the drive shaft as A, the distance from the rotation center of the drive shaft to the center of the long hole of the drive rod as B, and the distance from the center of the long hole of the drive rod to the center of the coupling structure as C, where C<A<B; The driving rod has a curved structure and includes a first section that is arched in a first direction and a second section that is arched in a second direction opposite to the first direction.

2. The load switch electric operating device according to claim 1, characterized in that: Define A=L, where A / B / C is: L / (3L+3.5) / (L-1).

3. The load switch electric operating device according to claim 1, characterized in that: The driving rod further includes reinforcing ribs extending on the first section and the second section.

4. The load switch electric operating device according to claim 1, characterized in that: A first sleeve is fixed on the output shaft, and the cam is slidably sleeved outside the first sleeve.

5. The load switch electric operating device according to claim 1, characterized in that: A waist-shaped boss is also formed on the output shaft, a waist-shaped hole is opened in the middle of the driving member, and the waist-shaped boss is adapted to be inserted into the waist-shaped hole.

6. The load switch electric operating device according to any one of claims 1 to 5, characterized in that: The bracket assembly comprises: A first support plate; a second support plate, disposed opposite to the first support plate; and A support rod, two ends of which are respectively fixed to the first support plate and the second support plate; The speed change gear assembly is installed between the first support plate and the second support plate.

7. The load switch electric operating device according to any one of claims 1 to 5, characterized in that: The speed change gear assembly includes two or more speed change gears meshing with each other.

8. The load switch electric operating device according to any one of claims 1 to 5, characterized in that: The load switch electric operating device also includes a control circuit electrically connected to the motor assembly, and the control circuit controls the operation of the motor assembly.

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