Interlock for a blade

Abstract

The utility model belongs to the field of knife switch interlocking, especially is involved in a kind of knife switch interlocking device, it includes base, knife switch seat, knife switch stem, carousel, first sliding frame, second sliding frame, gear wheel is connected on the carousel with the corresponding side of first sliding frame, and the carousel with the corresponding side of second sliding frame is connected with the lever, second sliding frame is also equipped with the drive mechanism for driving lever in it, rack plate is slidably connected in first sliding frame with gear wheel engagement, the both ends inner wall of first sliding frame are correspondingly provided with limit slot, each limit slot is slidably connected with contact switch in it, and contact switch and the inner wall of limit slot are connected with spring between it. The device can control knife switch conveniently, and can accurately monitor its on-off state, and has the characteristics of stable use.

Description

Technical Field

[0001] This utility model belongs to the field of knife switch interlocking, and in particular relates to a knife switch interlocking device. Background Technology

[0002] A knife switch, also known as a knife gate, is generally used in AC or DC low-voltage (not exceeding 500V) circuits that do not require frequent switching on and off. Its operating current must not exceed the rated value under rated voltage. On machine tools, knife switches are mainly used as power switches; they are generally not used to connect or disconnect the operating current of motors.

[0003] Most existing knife switches are mechanically operated, while some interlocked and electrically controllable knife switches may experience deformation of the point control structure due to prolonged use and repeated opening and closing, leading to inaccurate subsequent control and monitoring. Therefore, a knife switch interlocking device is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a switch interlocking device that solves the problem of reduced control and monitoring accuracy caused by deformation of existing switch interlocking structures after long-term use.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] The present invention relates to a knife switch interlocking device, comprising a base, a knife switch seat, and a knife switch rod rotatably mounted on the knife switch seat. The knife switch seat also has limit bolt holes. The knife switch rod extends to both outer sides of the knife switch seat at its rotatable connection point and is connected to a turntable on each side. A first sliding frame and a second sliding frame are connected to both sides of the base. A gear is connected to the turntable on the side corresponding to the first sliding frame, and a lever is connected to the turntable on the side corresponding to the second sliding frame. A drive mechanism for driving the lever is installed inside the second sliding frame. A rack plate that meshes with the gear is slidably connected inside the first sliding frame. Limit grooves are correspondingly formed on the inner walls of both ends of the first sliding frame. A contact switch that meshes with and slides with the rack plate is slidably connected in each limit groove, and a spring connects the contact switch to the inner wall of the limit groove.

[0007] Both ends of the rack plate are chamfered, and the top of the contact switch is hemispherical. The rack plate engages with the hemispherical contact switch through the chamfered ends.

[0008] The drive mechanism includes a servo motor, a lead screw, and a push frame. The servo motor is installed on the inner walls of both sides of the second slide frame. The two ends of the lead screw are connected to the output ends of the two servo motors. A slide block is threaded onto the outer side of the lead screw. The push frame is connected to the slide block and sleeved on the outer side of the lever.

[0009] The slide block is slidably connected within the second slide frame, and one end extends through the second slide frame to its outside, with the push frame connected to the extended end of the slide block.

[0010] The two side frames of the push frame slide and fit into the two sides of the lever, respectively.

[0011] Advantages of this utility model:

[0012] The knife switch interlocking device of this utility model uses a servo motor to drive the lead screw to rotate, which in turn drives the push frame to push the lever, thereby realizing the rotation adjustment of the knife switch. When the knife switch is at the upper end, it can be in the closed position, and when it is at the lower end, it can be in the open position. The rotation of the knife switch also drives the gear to rotate, which causes the rack plate to move down and press the contact switch on the lower side, so that the display screen at the rear end shows that it is in the closed position. When the contact switch on the upper side is pressed, the display screen shows that it is in the open position. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a side view of the structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of this utility model without a first sliding frame.

[0016] Figure 4 This is a schematic diagram of the structure of the baseless, first, and second sliding frames of this utility model.

[0017] In the diagram: 1. Base; 2. Knife holder; 3. Knife rod; 4. Turntable; 5. Lever; 6. Gear; 7. First slide frame; 8. Rack plate; 9. Limit groove; 10. Contact switch; 11. Spring; 12. Second slide frame; 13. Servo motor; 14. Lead screw; 15. Slide block; 16. Push frame; 17. Limit bolt hole. Detailed Implementation

[0018] The specific embodiments of this utility model are further described below with reference to the accompanying drawings.

[0019] like Figure 1-4As shown, the knife switch interlocking device of this utility model includes a base 1, a knife switch seat 2, and a knife switch rod 3 rotatably mounted on the knife switch seat 2. The knife switch seat 2 is also provided with a limit bolt hole 17. The knife switch rod 3 and the knife switch seat 2 are rotatably connected to each other on their two outer sides and are connected to a turntable 4. The two sides of the base 1 are respectively connected to a first sliding frame 7 and a second sliding frame 12. A gear 6 is connected to the turntable 4 on the side corresponding to the first sliding frame 7, and a lever 5 is connected to the turntable 4 on the side corresponding to the second sliding frame 12. A drive mechanism for driving the lever 5 is also installed in the second sliding frame 12. A rack plate 8 that meshes with the gear 6 is slidably connected in the first sliding frame 7. Limit grooves 9 are provided on the inner walls of both ends of the first sliding frame 7. A contact switch 10 that meshes with the rack plate 8 is slidably connected in each limit groove 9, and a spring 11 is connected between the contact switch 10 and the inner wall of the limit groove 9.

[0020] Both ends of the rack plate 8 are chamfered, and the top of the contact switch 10 is hemispherical. The rack plate 8 engages with the hemispherical contact switch 10 through the chamfered ends.

[0021] The drive mechanism includes a servo motor 13, a lead screw 14, and a push frame 16. The servo motor 13 is installed on the inner walls of both sides of the second slide frame 12. The two ends of the lead screw 14 are connected to the output ends of the two servo motors 13. The outer side of the lead screw 14 is threaded with a slide block 15. The push frame 16 is connected to the slide block 15 and is sleeved on the outer side of the lever 5.

[0022] The slide block 15 is slidably connected inside the second slide frame 12, and one end extends through the second slide frame 12 to its outside. The push frame 16 is connected to the extended end of the slide block 15.

[0023] The two side frames of the push frame 16 are respectively slidably attached to the two sides of the lever 5.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a knife switch interlocking device, including a base 1, a knife switch seat 2, and a knife switch rod 3 rotatably mounted on the knife switch seat 2. The knife switch seat 2 is also provided with limit bolt holes 17. The rotatable connection between the knife switch rod 3 and the knife switch seat 2 extends to its two outer sides respectively, and each is connected to a turntable 4. The turntables 4 on both sides can also cooperate with the knife switch seat 2 to stabilize the rotation of the knife switch rod 3. The knife switch seat 2 is an existing device, and the limit bolt holes 17 provided on it are used to install existing limit screws and are locked by a five-proof lock.

[0025] A first sliding frame 7 and a second sliding frame 12 are respectively connected to both sides of the base 1. A gear 6 is connected to the turntable 4 on the side corresponding to the first sliding frame 7, and a lever 5 is connected to the turntable 4 on the side corresponding to the second sliding frame 12. A drive mechanism for driving the lever 5 is also installed inside the second sliding frame 12. The drive mechanism includes a servo motor 13, a lead screw 14, and a push frame 16. The servo motor 13 is installed on the inner walls of both sides of the second sliding frame 12. The two ends of the lead screw 14 are connected to the output ends of the two servo motors 13. A slide seat 15 is threaded onto the outer side of the lead screw 14, and the push frame 16 is connected to the slide seat 15. The push frame 16 is fitted onto the outside of the lever 5. The two side frames of the push frame 16 slide and fit against the two sides of the lever 5 respectively. In this way, the servo motor 13 can drive the lead screw 14 to rotate, thereby driving the slide block 15 to slide in the second slide frame 12, and simultaneously driving the push frame 16 to move. When the push frame 16 moves upward, the two sides of the lever 5 abut against the two side frames of the push frame 16 respectively. At this time, the knife lever 3 is in the upper closed position. When the push frame 16 moves downward, the two sides of the lever 5 abut against the two side frames of the push frame 16 again respectively. At this time, the knife lever 3 is in the lower open position.

[0026] The slide block 15 is slidably connected inside the second slide frame 12, and one end extends through the second slide frame 12 to its outside. The push frame 16 is connected to the extended end of the slide block 15 so that the slide block 15 will not collide with the turntable 4.

[0027] A rack plate 8 that meshes with a gear 6 is slidably connected inside the first sliding frame 7. Limiting grooves 9 are correspondingly opened on the inner walls of both ends of the first sliding frame 7. A contact switch 10 that meshes with and slides in each limiting groove 9 is slidably connected inside the rack plate 8. A spring 11 is connected between the contact switch 10 and the inner wall of the limiting groove 9. Both ends of the rack plate 8 are chamfered. The top of the contact switch 10 is hemispherical. The rack plate 8 abuts against the hemispherical contact switch 10 through the chamfered end. When the switch lever 3 is rotated to the upper closed position, the gear 6 will also drive the rack plate 8 on each side to move down through the meshing connection to squeeze the contact switch 10 on the lower side of the first sliding frame 7 and compress the spring 11, so that the background display shows that it is in the closed state. Conversely, the rack plate 8 moves up to squeeze the upper contact switch 10, so the background display shows that it is in the open state.

[0028] The power source for the servo motor 13 can be set to be either driven by a dry cell battery or directly by a power supply. Furthermore, the dry cell battery can calculate the number of switch operations based on the number of servo motor movements.

Claims

1. A knife switch interlocking device, comprising a base (1), a knife switch seat (2), and a knife switch rod (3) rotatably mounted on the knife switch seat (2), wherein the knife switch seat (2) is further provided with a limit bolt hole (17), characterized in that, The rotatable connection between the guillotine lever (3) and the guillotine seat (2) extends to their two outer sides and is connected to a turntable (4). The base (1) is connected to a first sliding frame (7) and a second sliding frame (12) on its two sides respectively. A gear (6) is connected to the turntable (4) on the side corresponding to the first sliding frame (7), and a lever (5) is connected to the turntable (4) on the side corresponding to the second sliding frame (12). A drive mechanism for driving the lever (5) is also installed in the second sliding frame (12). A rack plate (8) that meshes with the gear (6) is slidably connected in the first sliding frame (7). Limiting grooves (9) are opened on the inner walls of both ends of the first sliding frame (7). A contact switch (10) that meshes with the rack plate (8) is slidably connected in each limiting groove (9), and a spring (11) is connected between the contact switch (10) and the inner wall of the limiting groove (9).

2. The switch interlocking device according to claim 1, characterized in that, Both ends of the rack plate (8) are chamfered, and the top of the contact switch (10) is hemispherical. The rack plate (8) and the hemispherical contact switch (10) are engaged and abutted by the chamfered ends.

3. A switch interlocking device according to claim 1, characterized in that, The drive mechanism includes a servo motor (13), a lead screw (14), and a push frame (16). The servo motor (13) is installed on the inner walls of both sides of the second slide frame (12). The two ends of the lead screw (14) are connected to the output ends of the two servo motors (13). The outer side of the lead screw (14) is threaded with a slide block (15). The push frame (16) is connected to the slide block (15) and is sleeved on the outside of the lever (5).

4. A switch interlocking device according to claim 3, characterized in that, The slide block (15) is slidably connected inside the second slide frame (12) and one end extends through the second slide frame (12) to its outside. The push frame (16) is connected to the extended end of the slide block (15).

5. A switch interlocking device according to claim 3, characterized in that, The two side frames of the push frame (16) are respectively slidably attached to the two sides of the lever (5).

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