Blade contact fuse with protection device

Abstract

This utility model discloses a knife-type contact fuse with a protective device, including a base plate. L-shaped fixing plates are fixedly connected to the left and right sides of the bottom of the base plate. The vertical plates of the L-shaped fixing plates have through holes, and a rotating rod is rotatably connected to the through holes. A crank handle is fixedly connected to one end of the rotating rod, and a tube is fixedly connected to the outer wall of the rotating rod. A connecting arm is hinged to the outer wall of the tube. In this knife-type contact fuse with a protective device, controlling the crank handle to rotate the rotating rod causes the connecting arm connected to the outer wall of the tube on the outer wall of the rotating rod to push the hinged component connected to the front end upwards. This pushes the hinged component through the through hole at the bottom of the base plate and also pushes up the horizontal block connected to the top of the hinged component, causing the fuse to detach from the inner frame of the triangular base.

Description

Technical Field

[0001] This utility model relates to the field of fuses, specifically a knife-type contact fuse with a protective device. Background Technology

[0002] As a crucial component for circuit protection, fuses are widely used in various electrical equipment and power systems. Their primary function is to disconnect the circuit by melting the fusible element inside the fuse when the current exceeds a set threshold, thereby preventing damage to equipment and systems from overcurrent. Traditional fuses mainly consist of a fusible element, contacts, and a housing; their structure is simple, but they still have many shortcomings in practical applications.

[0003] Traditional fuses typically employ a simple melting mechanism: when the current exceeds a threshold, the fusible element melts due to overheating, thus breaking the circuit. However, this design generates an electric arc during the melting process, potentially posing a safety hazard to surrounding equipment and personnel. Furthermore, the protective devices of traditional fuses are relatively simple and cannot effectively cope with complex and changing circuit environments, especially under high voltage and high current conditions, where their reliability and safety need to be improved.

[0004] However, the traditional knife-type contact fuse with protective devices currently on the market has an insufficiently optimized structure and an unreasonable design. Utility Model Content

[0005] The purpose of this invention is to provide a knife-type contact fuse with a protective device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A knife-type contact fuse with a protective device includes a base plate. L-shaped fixing plates are fixedly connected to the left and right sides of the bottom of the base plate. A through hole is formed in the vertical plate of the L-shaped fixing plate, and a rotating rod is rotatably connected to the through hole. A crank handle is fixedly connected to one end of the rotating rod. A tube is fixedly connected to the outer wall of the rotating rod. A connecting arm is hinged to the outer wall of the tube. A hinge member is installed at the end of the connecting arm away from the tube. A horizontal block is fixedly connected to the end of the hinge member away from the connecting arm. Slider blocks are fixedly connected to both ends of the horizontal block. Vertical slot frames are fixedly connected to the left and right sides of the upper surface of the base plate, and the vertical slot frames are slidably connected to the sliders.

[0008] As a further embodiment of this utility model: a cover frame is installed on the rear part of the upper surface of the substrate, a vertical piece is fixedly connected to the lower surface of the cover frame, and a slot is opened on the surface of the cover frame.

[0009] As a further embodiment of this utility model: the upper surface of the slider is provided with a placement platform, and the upper part of the placement platform is provided with a fuse, and the front end and the rear end of the fuse are fixedly connected with a cutting head.

[0010] As a further embodiment of this utility model: triangular seats are fixedly connected to both the left and right sides of the upper surface of the placement platform, and connecting plates are fixedly connected to both the left and right sides of the triangular seats, with bolt and nut assemblies installed on the connecting plates.

[0011] As a further embodiment of this utility model: the upper triangular part of the triangular seat is inwardly closed, and a cutting head is provided on the closed part of the triangular seat, which is adapted to the triangular seat.

[0012] As a further improvement of this utility model: the bottom of the cutter head is conical, and the vertical groove frame is adapted to the slider.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model controls the crank handle to rotate the rotating rod. The connecting arm connected to the outer wall of the tube on the outer wall of the rotating rod will cause the hinge connected at the front end to be pushed upward. The hinge is pushed up through the through hole at the bottom of the base plate, and the horizontal block connected to the top of the hinge is also pushed up, so that the fuse is detached from the inner frame of the triangular seat. Its structure is more optimized and its design is more reasonable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a knife-type contact fuse with a protective device.

[0016] Figure 2 This is a structural diagram of the rotating rod and its connecting assembly of a knife-type contact fuse with a protective device.

[0017] Figure 3 This is a diagram illustrating a knife-type contact fuse with a protective device.

[0018] In the diagram: 1. Base plate; 2. Cover frame; 3. Vertical piece; 4. Slot; 5. Vertical slot frame; 6. Fuse; 7. Triangular seat; 8. Cutting head; 9. Connecting piece; 10. Bolt and nut assembly; 11. Handle; 12. Rotating rod; 13. L-shaped fixing piece; 14. Tube; 15. Connecting arm; 16. Hinge; 17. Through hole; 18. Horizontal block; 19. Slider. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3 In this embodiment of the present invention, a knife-type contact fuse with a protective device includes a base plate 1. L-shaped fixing plates 13 are fixedly connected to the left and right sides of the bottom of the base plate 1. The vertical plates of the L-shaped fixing plates 13 have through holes, and a rotating rod 12 is rotatably connected to the through holes. A crank handle 11 is fixedly connected to one end of the rotating rod 12. When the operator rotates the crank handle 11, the rotating rod 12 rotates, and the tube 14 on the rotating rod 12 rotates synchronously. This rotation, through the connecting arm 15 hinged to the outer wall, pushes the hinged member 16 connected to the front end upwards.

[0021] A tube 14 is fixedly connected to the outer wall of the rotating rod 12. A connecting arm 15 is hinged to the outer wall of the tube 14. A hinge 16 is installed at the end of the connecting arm 15 away from the tube 14. A horizontal block 18 is fixedly connected to the end of the hinge 16 away from the connecting arm 15. The hinge 16 lifts the horizontal block 18. The sliders 19 at both ends of the horizontal block 18 slide along the vertical groove frame 5 to achieve vertical lifting. The linkage mechanism is driven by the crank to achieve one-click disconnection of the fuse, which greatly shortens the maintenance time. At the same time, the sliding guide design between the slider and the vertical groove frame ensures accurate movement trajectory and avoids shaking or deviation.

[0022] The matching structure of the triangular seat and the cutter head and the cone design prevent the fuse from falling off accidentally. Both ends of the horizontal block 18 are fixedly connected to the slider 19. The upper surface of the substrate 1 is fixedly connected to the left and right sides of the vertical groove frame 5, and the vertical groove frame 5 is slidably connected to the slider 19.

[0023] Please see Figures 1-2 Specifically: a cover frame 2 is installed on the rear part of the upper surface of the substrate 1, a vertical piece 3 is fixedly connected to the lower surface of the cover frame 2, a slot 4 is opened on the surface of the cover frame 2, a placement platform is provided on the upper surface of the slider 19, and a fuse 6 is provided on the upper part of the placement platform. A blade 8 is fixedly connected to the front end and the rear end of the fuse 6. The bottom of the blade 8 is conical. The vertical slot frame 5 is adapted to the slider 19. Since the bottom of the blade 8 is conical, it is adapted to the closing structure of the triangular seat 7, which facilitates detachment and insertion.

[0024] Please see Figure 2Specifically: Triangular seats 7 are fixedly connected to both the left and right sides of the upper surface of the placement platform. Connecting pieces 9 are fixedly connected to both the left and right sides of the triangular seats 7. Bolt and nut assemblies 10 are installed on the connecting pieces 9. Bolt and nut assemblies 10 facilitate adjustment of the tightening force of the triangular seats and adapt to different models of fuses. The upper triangular part of the triangular seat 7 is inwardly closed. The closed part of the triangular seat 7 is provided with a cutting head 8. The cutting head 8 is adapted to the triangular seat 7. During the lifting of the horizontal block 18, the cutting heads 8 at both ends of the fuse 6 are driven to disengage from the closed inner frame part of the triangular seat 7, completing the disassembly.

[0025] During resetting and installation, the crank handle is operated in the opposite direction to lower the horizontal block 18. The cutter head 8 is automatically inserted into the triangular seat 7 under the guidance of the conical structure. The triangular seat is then tightened by the bolt and nut assembly 10 to ensure stable positioning of the fuse.

[0026] The working principle of this utility model is as follows:

[0027] In use, vertical slot frames 5 are fixed on the left and right sides of the upper surface of the substrate 1 and slidably connected to slider 19. The bottom of slider 19 is fixed to horizontal block 18 installed below fuse 6, ensuring that horizontal block 18 can be lifted up and fuse 6 connected at both ends is disengaged from the inner frame of triangular seat 7.

[0028] Specifically: the control handle 11 is cranked, which drives the rotating rod 12 to rotate. The connecting arm 15 connected to the outer wall of the tube 14 connected to the outer wall of the rotating rod 12 will drive the hinge 16 connected at the front end to be pushed upward. The hinge 16 is pushed up through the through hole 17 at the bottom of the base plate 1, and the horizontal block 18 connected to the top of the hinge 16 is also pushed up, so that the fuse 6 is disengaged from the inner frame of the triangular seat 7.

[0029] When the fuse needs to be replaced, the operator only needs to rotate the handle 11 approximately 90 degrees. The rotating rod 12 drives the tube 14 to rotate, and the connecting arm 15 pushes the cross block 18 up by about 20mm, so that the blades 8 at both ends of the fuse 6 are completely disengaged from the inner frame of the triangular seat 7. At this point, the fuse can be easily removed. After replacing the new part, the handle is operated in reverse to reset it. The blades are automatically aligned and inserted under the guidance of the conical structure, completing the installation. The entire process requires no tools and is simple and efficient to operate.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A knife blade contact fuse with a protection device, comprising a base plate (1), characterized in that: L-shaped fixing plates (13) are fixedly connected to the bottom left and right sides of the substrate (1). The vertical plate of the L-shaped fixing plate (13) has a through hole, and a rotating rod (12) is rotatably connected to the through hole. A crank (11) is fixedly connected to one end of the rotating rod (12). A tube (14) is fixedly connected to the outer wall of the rotating rod (12). A connecting arm (15) is hinged to the outer wall of the tube (14). A hinge (16) is installed at the end of the connecting arm (15) away from the tube (14). A horizontal block (18) is fixedly connected to the end of the hinge (16) away from the connecting arm (15). A slider (19) is fixedly connected to both ends of the horizontal block (18). A vertical groove frame (5) is fixedly connected to the left and right sides of the upper surface of the substrate (1). The vertical groove frame (5) is slidably connected to the slider (19).

2. A knife blade contact fuse with a guard according to claim 1, characterized in that: A cover frame (2) is installed on the rear part of the upper surface of the substrate (1), and a vertical piece (3) is fixedly connected to the lower surface of the cover frame (2). A slot (4) is opened on the surface of the cover frame (2).

3. A knife blade contact fuse with a guard according to claim 1, characterized in that: The upper surface of the slider (19) is provided with a placement platform, and a fuse (6) is provided on the upper part of the placement platform. The front end and the rear end of the fuse (6) are fixedly connected with a cutting head (8).

4. A knife-type contact fuse with a protective device according to claim 3, characterized in that: Triangular seats (7) are fixedly connected to the left and right sides of the upper surface of the placement platform. Connecting pieces (9) are fixedly connected to the left and right sides of the triangular seats (7). Bolt and nut assemblies (10) are installed on the connecting pieces (9).

5. A knife blade contact fuse with a guard according to claim 4, characterized in that: The upper triangular part of the triangular seat (7) is inwardly closed, and a cutting head (8) is provided on the closed part of the triangular seat (7), which is adapted to the triangular seat (7).

6. A knife blade contact fuse with a guard according to claim 5, characterized in that: The bottom of the cutter head (8) is conical, and the vertical groove frame (5) is adapted to the slider (19).

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