Load isolation switch

Abstract

The utility model relates to the technical field of load isolation switches, in particular to a load isolation switch, which comprises a shell, an electric driving device, a static conductive plate, an arc extinguishing gate, a shifting fork spring and a fixed shaft are clamped and mounted in the shell, and a movable conductive assembly and a transmission connecting rod are rotatably mounted in the shell. The fixed shaft is rotatably mounted in the shell, one end of the shifting fork spring is in driving fit with the electric driving device, the electric driving device is in driving fit with the transmission connecting rod, one end of the transmission connecting rod is rotatably connected with the fixed shaft, and the other end is rotatably connected with the movable conductive assembly; the transmission connecting rod is controlled by the electric driving device to rotate, so that the transmission connecting rod drives the movable conductive assembly to rotate, the movable conductive assembly and the static conductive plate are contacted or disconnected, the load isolation switch is switched on and switched off, an electric remote operation mode is adopted, potential safety hazards of manual operation are avoided, and the distance between the static conductive plate and the movable conductive assembly is large. The contact opening distance is large, the isolation function is met, and the arc extinguishing capacity is high.

Description

Technical Field

[0001] This utility model relates to the field of load disconnect switches, specifically a load disconnect switch. Background Technology

[0002] A load disconnect switch is a device that isolates a de-energized part from a energized part and creates a clear disconnect point to isolate faulty equipment or to perform power outage maintenance. In the current low-voltage electrical appliance field, load disconnect switches are widely used in various capacities and types.

[0003] Existing load disconnect switches are mainly composed of stationary contacts, moving contacts, drive mechanisms, flexible wires, and terminals. The stationary and moving contacts are connected to external wires through flexible wires and terminals. The drive mechanism controls the opening and closing of the moving and stationary contacts to achieve the effect of opening and closing the circuit breaker. There are relatively few types of small or micro load switches, and most of them are operated manually. The contact gap between the stationary and moving contacts is small.

[0004] However, load disconnect switches operated manually have safety hazards during manual operation and cannot be remotely operated or controlled. The small contact gap leads to low arc extinguishing capability and lack of isolation function, which affects the service life of the load switch. Therefore, a load disconnect switch is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a load disconnect switch to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A load disconnect switch includes a housing. Inside the housing, an electric drive device, a stationary conductive plate, an arc suppression grid, a shift fork spring, and a fixed shaft are snap-fitted together. Inside the housing, a moving conductive component and a transmission link are rotatably mounted. The fixed shaft is rotatably mounted inside the housing. One end of the shift fork spring is driven by the electric drive device, which is driven by the transmission link. One end of the transmission link is rotatably connected to the fixed shaft, and the other end is rotatably connected to the moving conductive component. The moving conductive component and the stationary conductive plate are in contact.

[0008] Preferably, the electric drive device includes a micro motor, a worm gear, a helical gear, a sprocket gear, and a meshing gear. The micro motor is snapped into the housing, the worm gear is fixedly connected to the output end of the micro motor, and the helical gear, sprocket gear, and meshing gear are all rotatably mounted inside the housing. The helical gear meshes with the worm gear for transmission, the sprocket gear meshes with the helical gear for transmission, and the meshing gear meshes with the sprocket gear for transmission.

[0009] Preferably, the meshing gear is fixedly connected to a V-shaped shift fork A, a V-shaped shift fork B, a partial gear, a V-shaped shift fork C, and a V-shaped shift fork D. The V-shaped shift fork A and V-shaped shift fork B are located on the same side of the meshing gear, while the V-shaped shift fork C and V-shaped shift fork D are located on the other side of the meshing gear. The partial gear is located on the side wall of the meshing gear and meshes with the plate gear for transmission. The fixed shaft is located between the V-shaped shift fork A and V-shaped shift fork B, and the fixed shaft rotates coaxially with the meshing gear. Both the V-shaped shift fork A and V-shaped shift fork B are engaged with the transmission connecting rod. One end of the shift fork spring is inserted between the V-shaped shift fork C and V-shaped shift fork D.

[0010] Preferably, the moving conductive component includes a moving conductive sheet, a flexible wire, an output conductive sheet, a rotating shaft, a left pressure torsion spring, a right pressure torsion spring, and a linkage shaft. The rotating shaft is rotatably installed inside the housing, the moving conductive sheet is fixedly connected to the rotating shaft, and the linkage shaft is used to link the two sets of moving conductive sheets together. One end of the moving conductive sheet is in contact with the stationary conductive plate, one end of the flexible wire is electrically connected to the moving conductive sheet, and the other end is electrically connected to the output conductive sheet. The output conductive sheet is snapped onto the bottom of the housing, and the left and right pressure torsion springs are the two ends of a torsion spring, which is sleeved and installed between the two sets of moving conductive sheets.

[0011] Preferably, the transmission linkage includes an upper linkage, a bushing, a floating shaft, a transmission shaft, and a lower linkage. One end of the upper linkage is rotatably connected to a fixed shaft, and the other end is rotatably connected to the middle of the bushing. The floating shaft is fixedly connected to one end inside the lower linkage, and the transmission shaft is fixedly connected to the other end inside the lower linkage. The bushing is sleeved outside the floating shaft, and the transmission shaft passes through and is rotatably connected to the movable conductive plate. A torsion spring is sleeved on the transmission shaft. The bushing is pressed and engaged with the left pressure torsion spring, and the right pressure torsion spring is pressed and engaged with the movable conductive plate.

[0012] Preferably, the outer casing includes a housing base, a fixing plate, and a housing cover, with the housing base and housing cover being sealed and snapped together, and the fixing plate being snapped and installed between the housing base and the housing cover.

[0013] The beneficial effects of this utility model are:

[0014] This utility model controls the rotation of the transmission link through an electric drive device, which in turn drives the moving conductive component to rotate, causing the moving conductive component to contact or disconnect from the stationary conductive plate, thus opening and closing the load disconnecting switch. The arc-extinguishing grid extinguishes the electric arc generated during opening and closing. The electric remote operation method avoids the safety hazards of manual operation. The large distance between the stationary conductive plate and the moving conductive component and the large contact gap meet the isolation function and have strong arc-extinguishing ability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the outer shell structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the electric drive device of this utility model;

[0019] Figure 4 This is a schematic diagram of the front structure of the meshing gear of this utility model;

[0020] Figure 5 This is a schematic diagram of the back structure of the meshing gear of this utility model;

[0021] Figure 6 This is a schematic diagram of the transmission connecting rod structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the dynamic conductive component of this utility model;

[0023] The attached figures are labeled as follows:

[0024] 1. Outer shell; 11. Shell base; 12. Fixing plate; 13. Shell cover; 2. Electric drive device; 21. Micro motor; 22. Worm gear; 23. Helical gear; 24. Sprocket gear; 25. Meshing gear; 251. V-shaped shift fork A; 252. V-shaped shift fork B; 253. V-shaped shift fork C; 254. V-shaped shift fork D; 255. Partial gear; 3. Moving conductive component; 31. Moving conductive plate; 32. Flexible wire; 33. Outgoing conductive plate; 34. Rotating shaft; 35. Left pressure torsion spring; 36. Right pressure torsion spring; 37. Linkage shaft; 4. Transmission connecting rod; 41. Upper connecting rod; 42. Bushing; 43. Floating shaft; 45. Transmission shaft; 46. Lower connecting rod; 5. Static conductive plate; 6. Arc suppression grid; 7. Shift fork spring; 8. Fixed shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] A load disconnect switch, such as Figures 1-7 As shown, the device includes a housing 1. Inside the housing 1, an electric drive device 2, a static conductive plate 5, an arc-suppressing grid 6, a shift fork spring 7, and a fixed shaft 8 are snapped together. Inside the housing 1, a moving conductive component 3 and a transmission link 4 are rotatably mounted. The fixed shaft 8 is rotatably mounted inside the housing 1. One end of the shift fork spring 7 is driven by the electric drive device, which is driven by the transmission link 4. One end of the transmission link 4 is rotatably connected to the fixed shaft 8, and the other end is rotatably connected to the moving conductive component 3. The moving conductive component 3 and the static conductive plate 5 are in contact with each other.

[0027] The outer casing 1 has a hole for fixing the fixed shaft 8 and a fixing position for fixing the electric drive device 2 and installing the arc suppression grid 6.

[0028] The transmission link 4 is rotated by the electric drive device 2, which in turn drives the moving conductive component 3 to rotate. This causes the moving conductive component 3 to contact or disconnect from the stationary conductive plate 5, thus opening and closing the load disconnect switch. The arc extinguishing grid 6 extinguishes the arc generated during the opening and closing. The electric remote operation method avoids the safety hazards of manual operation. The large distance between the stationary conductive plate 5 and the moving conductive component 3 and the large contact gap meet the isolation function and have strong arc extinguishing ability.

[0029] like Figures 2-3 As shown, the electric drive device 2 includes a micro motor 21, a worm gear 22, a helical gear 23, a sprocket gear 24, and a meshing gear 25. The micro motor 21 is snapped into the housing 1. The worm gear 22 is fixedly connected to the output end of the micro motor 21. The helical gear 23, the sprocket gear 24, and the meshing gear 25 are all rotatably mounted inside the housing 1. The helical gear 23 meshes with the worm gear 22 for transmission, the sprocket gear 24 meshes with the helical gear 23 for transmission, and the meshing gear 25 meshes with the sprocket gear 24 for transmission.

[0030] When the micro motor 21 is powered externally to make its output rotate forward and reverse, the worm 22 rotates forward and reverse. The worm 22 drives the meshing gear 25 to rotate forward and reverse simultaneously through the helical gear 23 and the flat gear.

[0031] like Figures 2-5As shown, V-shaped shift forks A251, B252, 255, C253, and D254 are fixedly connected to the meshing gear 25. V-shaped shift forks A251 and B252 are located on the same side of the meshing gear 25, while V-shaped shift forks C253 and D254 are located on the other side. The 255 is located on the side wall of the meshing gear 25 and meshes with the sprocket 24. The fixed shaft 8 is located between V-shaped shift forks A251 and B252 and rotates coaxially with the meshing gear 25. Both V-shaped shift forks A251 and B252 are engaged with the transmission link 4. One end of the shift fork spring 7 is inserted between V-shaped shift forks C253 and D254.

[0032] The transmission link 4 is installed between the V-shaped shift fork A251 and the V-shaped shift fork B252 via the fixed shaft 8. The V-shaped shift fork A251 pushes the transmission link 4 to swing in one direction, and the V-shaped shift fork B252 pushes the transmission link 4 to swing in the other direction. The swing of the transmission link 4 is around the fixed shaft 8. Therefore, the meshing gear 25 drives the transmission link 4 to swing. The shift fork spring 7 is installed and fixed on the housing seat 11. One side of the shift fork spring 7 is inserted between the V-shaped shift fork C253 and the V-shaped shift fork D254. When the meshing gear 25 rotates back and forth, when the partial gear 255 set on the meshing gear 25 exceeds the meshing part, the shift fork spring 7 applies a spring force to the V-shaped shift fork C253 and the V-shaped shift fork D254, so that the partial gear 255 on the meshing gear 25 and the plate gear 24 are kept in contact and meshed. When the rotation direction changes, meshing is immediately achieved.

[0033] like Figures 2-7 As shown, the moving conductive component 3 includes a moving conductive sheet 31, a flexible wire 32, an output conductive sheet 33, a rotating shaft 34, a left pressure torsion spring 35, a right pressure torsion spring 36, and a linkage shaft 37. The rotating shaft 34 is rotatably installed inside the housing 1. The moving conductive sheet 31 is fixedly connected to the rotating shaft 34. The linkage shaft 37 is used to link the two sets of moving conductive sheets 31 together. One end of the moving conductive sheet 31 is in contact with the stationary conductive plate 5. One end of the flexible wire 32 is electrically connected to the moving conductive sheet 31, and the other end is electrically connected to the output conductive sheet 33. The output conductive sheet 33 is snapped and installed at the bottom of the housing 1. The left pressure torsion spring 35 and the right pressure torsion spring 36 are the two ends of a torsion spring, which is sleeved and installed between the two sets of moving conductive sheets 31.

[0034] The movable conductive sheet 31 is provided with a through circular hole, and the linkage shaft 37 passes through the through circular hole provided with the movable conductive sheet 31, so that the two movable conductive sheets 31 are linked to form a double contact point and double break point current shunting structure of the conductive component. The movable conductive sheet 31 rotates in the outer shell 1 by means of the rotating shaft 34.

[0035] like Figures 1-7 As shown, the transmission link 4 includes an upper link 41, a bushing 42, a floating shaft 43, a transmission shaft 45, and a lower link 46. One end of the upper link 41 is rotatably connected to the fixed shaft 8, and the other end is rotatably connected to the middle of the bushing 42. The floating shaft 43 is fixedly connected to one end inside the lower link 46, and the transmission shaft 45 is fixedly connected to the other end inside the lower link 46. The bushing 42 is sleeved on the outside of the floating shaft 43. The transmission shaft 45 passes through and is rotatably connected to the moving conductive plate 31. A torsion spring is sleeved on the transmission shaft 45. The bushing 42 is pressed and engaged with the left pressure torsion spring 35, and the right pressure torsion spring 36 is pressed and engaged with the moving conductive plate 31.

[0036] The upper connecting rod 41, the lower connecting rod 46 and the moving conductive plate 31 form a three-bar linkage structure. The transmission shaft 45 passes through the hole provided in the moving conductive plate 31 in the moving conductive assembly 3, and passes through the axis (middle of the torsion spring) of the left pressure torsion spring 35 and the right pressure torsion spring 36. The transmission shaft 45 rotates back and forth with the transmission connecting rod 4, causing the bushing 42 to squeeze the left pressure torsion spring 35 and the right pressure torsion spring 36 to squeeze the moving conductive plate 31, generating contact pressure.

[0037] like Figure 1 As shown, the outer shell 1 includes a shell base 11, a fixing plate 12 and a shell cover 13. The shell base 11 and the shell cover 13 are sealed and snapped together, and the fixing plate 12 is snapped and installed between the shell base 11 and the shell cover 13.

[0038] The electric drive unit 2, the static conductive plate 5, the arc suppression grid 6, the shift fork spring 7, the fixed shaft 8, the moving conductive component 3, and the transmission connecting rod 4 are all located between the housing base 11 and the housing cover 13. The housing base 11 and the housing cover 13 are sealed and snapped together, forming a sealed space inside this load disconnect switch. The fixed plate 12 increases the installation firmness between the housing base 11 and the housing cover 13.

[0039] The working principle of the load disconnect switch provided by this utility model is as follows:

[0040] The electric control micro motor 21 operates. When the output end of the micro motor 21 rotates forward and reverse, the worm gear 22 rotates forward and reverse. The worm gear 22 drives the meshing gear 25 to rotate forward and reverse simultaneously through the helical gear 23 and the flat gear. The meshing gear 25 drives the transmission connecting rod 4 to swing, which makes the moving conductive component 3 operate. The moving conductive component 3 and the stationary conductive plate 5 contact or disconnect, so that the load isolating switch opens and closes. The arc extinguishing grid 6 extinguishes the arc generated by opening and closing. The electric remote operation method is adopted to avoid the safety hazards of manual operation. The distance between the stationary conductive plate 5 and the moving conductive component 3 is large, and the contact opening distance is large to meet the isolation function and the arc extinguishing ability is strong.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A load disconnect switch, comprising a housing (1), characterized in that, The outer casing (1) is fitted with an electric drive device (2), a static conductive plate (5), an arc-suppressing grid (6), a shift fork spring (7), and a fixed shaft (8). The outer casing (1) is rotatably fitted with a moving conductive component (3) and a transmission link (4). The fixed shaft (8) is rotatably fitted inside the outer casing (1). One end of the shift fork spring (7) is driven by the electric drive device. The electric drive device is driven by the transmission link (4). One end of the transmission link (4) is rotatably connected to the fixed shaft (8), and the other end is rotatably connected to the moving conductive component (3). The moving conductive component (3) and the static conductive plate (5) are in contact.

2. A load disconnect switch according to claim 1, characterized in that, The electric drive device (2) includes a micro motor (21), a worm (22), a helical gear (23), a sprocket (24), and a meshing gear (25). The micro motor (21) is snapped into the housing (1). The worm (22) is fixedly connected to the output end of the micro motor (21). The helical gear (23), the sprocket (24), and the meshing gear (25) are all rotatably installed inside the housing (1). The helical gear (23) meshes with the worm (22) for transmission. The sprocket (24) meshes with the helical gear (23) for transmission. The meshing gear (25) meshes with the sprocket (24) for transmission.

3. A load disconnect switch according to claim 2, characterized in that, The meshing gear (25) is fixedly connected to V-shaped forks A (251), B (252), a partial gear (255), C (253), and D (254). V-shaped forks A (251) and B (252) are located on the same side of the meshing gear (25), while V-shaped forks C (253) and D (254) are located on the other side. The partial gear (255) is located on the meshing gear (25). On the side wall of gear (25), a local gear (255) meshes with a plate gear (24) for transmission. The fixed shaft (8) is located between V-shaped shift fork A (251) and V-shaped shift fork B (252), and the fixed shaft (8) rotates coaxially with the meshing gear (25). Both V-shaped shift fork A (251) and V-shaped shift fork B (252) are engaged with the transmission connecting rod (4). One end of the shift fork spring (7) is inserted between V-shaped shift fork C (253) and V-shaped shift fork D (254).

4. A load disconnect switch according to claim 1, characterized in that, The moving conductive component (3) includes a moving conductive sheet (31), a flexible wire (32), an output conductive sheet (33), a rotating shaft (34), a left pressure torsion spring (35), a right pressure torsion spring (36), and a linkage shaft (37). The rotating shaft (34) is rotatably installed inside the outer shell (1). The moving conductive sheet (31) is fixedly connected to the rotating shaft (34). The linkage shaft (37) is used to link the two sets of moving conductive sheets (31). One end of the moving conductive sheet (31) is in contact with the stationary conductive plate (5). One end of the flexible wire (32) is electrically connected to the moving conductive sheet (31), and the other end is electrically connected to the output conductive sheet (33). The output conductive sheet (33) is snapped and installed at the bottom of the outer shell (1). The left pressure torsion spring (35) and the right pressure torsion spring (36) are the two ends of the torsion spring. The torsion spring is sleeved and installed between the two sets of moving conductive sheets (31).

5. A load disconnect switch according to claim 4, characterized in that, The transmission link (4) includes an upper link (41), a bushing (42), a floating shaft (43), a transmission shaft (45), and a lower link (46). One end of the upper link (41) is rotatably connected to the fixed shaft (8), and the other end is rotatably connected to the middle of the bushing (42). The floating shaft (43) is fixed to one end inside the lower link (46), and the transmission shaft (45) is fixed to the other end inside the lower link (46). The bushing (42) is sleeved on the outside of the floating shaft (43). The transmission shaft (45) passes through and is rotatably connected to the moving conductive plate (31). The torsion spring is sleeved on the transmission shaft (45). The bushing (42) is pressed and engaged with the left pressure torsion spring (35), and the right pressure torsion spring (36) is pressed and engaged with the moving conductive plate (31).

6. A load disconnect switch according to claim 5, characterized in that, The outer shell (1) includes a shell base (11), a fixing plate (12) and a shell cover (13), and the shell base (11) and the shell cover (13) are sealed and snapped together, and the fixing plate (12) is snapped and installed between the shell base (11) and the shell cover (13).

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