A fuse tube pressing device for a drop-out fuse

Abstract

A fuse tube pressing device for a drop-out fuse belongs to the field of fuse processing technology. It includes a tube body (20), with fittings (19) respectively provided on both sides of the tube body (20), and a pressing mechanism. The device is characterized by having an inlet mold (4) and an outlet mold (7) for placing the fittings (19) respectively on both sides of the tube body (20). The inlet mold (4) is installed at the actuating end of the pressing mechanism, and the outlet mold (7) is installed at the end of an adjusting seat (8). An adjusting mechanism is provided within the adjusting seat (8). In the fuse tube pressing device of this application, by setting an adjusting seat and using the adjusting mechanism within the adjusting seat, the relative position of the tube body and the fittings in the outlet mold is adjusted. This achieves fuse tube pressing while facilitating the creation of a fuse tube where the tube body protrudes beyond the fitting structure.

Description

Technical Field

[0001] A fuse tube pressing device for a drop-out fuse belongs to the field of fuse processing technology. Background Technology

[0002] Drop-out fuses are a common type of short-circuit protection switch used in power distribution lines. A typical drop-out fuse consists of a ceramic element and a fuse tube (also called a fuse housing). The two ends of the fuse tube are connected to the two ends of the ceramic element, one end being the input terminal and the other the output terminal. Under normal operating conditions, current flows through the fuse. The fuse has very low resistance, allowing current to pass through normally without melting. However, when an overload or short-circuit fault occurs in the circuit, the current increases sharply, generating heat. When the heat reaches the melting point of the fuse, it melts, causing the ceramic element and fuse tube to separate at the input terminal.

[0003] In existing drop-out fuses, the fuse tube includes an insulating tube. The fuse tube is connected to both ends of the ceramic component via fittings at both ends of the insulating tube. In some models of drop-out fuses, the insulating tube protrudes beyond the fitting end on the corresponding side at the outlet end, such as the fuse tube assembly structure described in Chinese utility model patent application number 202320013010.3, application date January 4, 2023, entitled "Dual Protection Drop-out Fuse Based on Shape Memory Alloy".

[0004] Currently, the processing of fuse tubes generally involves pressing the insulating tube of the fuse tube into the fittings at both ends using a pressing method. Examples include the technical solutions described in Chinese invention patents: application number 202210613938.5 (application date June 1, 2022) entitled "A Production Process and System for Fuses"; application number 202311077462.9 (application date August 25, 2023) entitled "An Automatic Pressing Device for Fuse Tubes"; and application number 202010541669.7 (application date June 15, 2020) entitled "Automatic Cap Pressing Mechanism for Fuses".

[0005] The applicant of this application seeks to design a processing scheme for a novel fuse tube structure, particularly suitable for processing fuse tubes with insulating tubes protruding from their end fittings. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a fuse tube pressing device for a drop-out fuse that achieves the adjustment of the relative position of the tube body and the hardware in the die at the outlet end by setting an adjustment seat and adjusting the adjustment mechanism in the adjustment seat. Under the premise of achieving fuse tube pressing, it is beneficial to realize the fuse tube protruding from the hardware structure.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: the fuse tube pressing device of the drop-out fuse includes a workbench, the fuse tube body is placed on the surface of the workbench, and hardware is respectively provided on both sides of the tube body. A pressing mechanism for pressing the tube body into the hardware is provided on the surface of the workbench. The feature is that an inlet end mold and an outlet end mold for placing hardware are respectively provided on both sides of the tube body, wherein the inlet end mold is installed at the actuating end of the pressing mechanism, an adjusting seat opposite to the pressing mechanism is provided on the surface of the workbench, the outlet end mold is installed at the end of the adjusting seat, and an adjusting mechanism for adjusting the relative position between the tube body and the hardware in the outlet end mold is provided in the adjusting seat.

[0008] Preferably, a pushing cavity is provided in the adjusting seat, the pushing cavity penetrates the chamber of the adjusting seat, the outlet mold is fixed at the port of the pushing cavity facing the pressing mechanism, and the adjusting mechanism is slidably arranged in the pushing cavity.

[0009] Preferably, the pressing mechanism includes a linear motor, a pressing base is installed on the motor shaft of the linear motor, and the inlet end mold is fixed on the end face of the pressing base facing the adjusting base.

[0010] Preferably, a fixed frame is provided on the surface of the worktable, and the linear motor is fixed on the end face of one end of the fixed frame. The motor shaft of the linear motor passes through the fixed frame and is fixed to the pressure seat.

[0011] Preferably, the adjustment mechanism includes a push seat that is slidably disposed in the push cavity, and a push head is provided at the end of the push seat. The push head passes through the outlet mold and is opposite to the tube body.

[0012] Preferably, a lead screw is threaded to the end of the push seat facing away from the push head, and the lead screw extends to the outside of the adjustment seat and is fixed coaxially with the handwheel.

[0013] Preferably, a threaded sleeve is coaxially fixed at one end of the push base facing away from the push head. The central hole of the threaded sleeve is a threaded hole, and the lead screw passes through the central hole of the threaded sleeve and is threadedly connected to the threaded sleeve.

[0014] Preferably, a tube seat is also provided on the surface of the workbench, and a groove for placing the tube is provided on the surface of the tube seat. The tube seat (6) is located between the inlet end mold and the outlet end mold.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In the fuse tube pressing device of the drop-out fuse of this application, by setting an adjusting seat and adjusting the adjusting mechanism in the adjusting seat, the relative position of the tube body and the hardware in the die at the outlet end is adjusted. Under the premise of realizing fuse tube pressing, it is beneficial to realize the fuse tube body protruding from the hardware structure.

[0017] The tube body is arranged on the workbench surface by placing a tube seat on the workbench surface. Attached Figure Description

[0018] Figure 1 This is an isometric drawing of the fuse tube pressing device for a drop-out fuse.

[0019] Figure 2 This is a front view of the fuse tube pressing device for a drop-out fuse.

[0020] Figure 3 for Figure 2 The diagram is shown with the engine cover omitted.

[0021] Figure 4 for Figure 3 Top view.

[0022] Figure 5 for Figure 4 Partial sectional view along the AA direction.

[0023] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0024] Figures 7-8 This is a schematic diagram of the pressing process at the output end of a drop-out fuse.

[0025] The components include: 1. Machine cover; 2. Operation panel; 3. Pressure seat; 4. Inlet mold; 5. Workbench; 6. Pipe seat; 7. Outlet mold; 8. Adjustment seat; 9. Handwheel; 10. Cabinet; 11. Linear motor; 12. Fixture; 13. Push head; 14. Guide sleeve; 15. Push seat; 16. Threaded sleeve; 17. Push cavity; 18. Lead screw; 19. Fittings; 20. Pipe body. Detailed Implementation

[0026] Figures 1-8 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-8 The present invention will be further described below.

[0027] like Figures 1-2As shown, a fuse tube pressing device for a drop-out fuse (hereinafter referred to as the pressing device) includes a cabinet 10. A cover 1 is provided at one end of the upper surface of the cabinet 10, and an operation screen 2 is provided on the surface of the cover 1. A workbench 5 is provided on the side of the cover 1, and the workbench 5 extends from the cover 1 to the other end of the cabinet 10 along the length direction of the cabinet 10, and the workbench 5 protrudes from the upper surface of the cabinet 10.

[0028] A pressure seat 3 is therefore located on the end face of the machine cover 1. An inlet mold 4 is provided on the end face of the pressure seat 3. An adjustment seat 8 is also provided on the surface of the worktable 5. An outlet mold 7 is provided on the end face of the adjustment seat 8 facing the machine cover 1. The inlet mold 4 and the outlet mold 7 are positioned opposite each other. A tube seat 6 is also provided on the surface of the worktable 5. The tube seat 6 is located between the inlet mold 4 and the outlet mold 7. A tube body 20 for accommodating the fuse tube is provided on the surface of the tube seat 6 (see...). Figures 7-8 During pressing, the tube body 20 is placed in the groove on the surface of the tube seat 6, and the fittings 19 are placed in the inlet mold 4 and the outlet mold 7 respectively (see...). Figures 7-8 Then, the pressing seat 3 operates to press the hardware 19 placed in the inlet mold 4 and the outlet mold 7 into one piece with the tube body 20 to form the fuse tube of the drop-out fuse.

[0029] like Figures 3-4 As shown, a linear motor 11 is installed inside the machine housing 1. An opening is provided on the end face of the machine housing 1 facing the worktable 5, and a fixing frame 12 is fixed at this opening. The linear motor 11 is fixed to one side of the fixing frame 12, and the pressure seat 3 is located on the other side of the fixing frame 12. The motor shaft of the linear motor 11 passes through the fixing frame 12 and extends to the back of the pressure seat 3 and is fixed thereon. When the linear motor 11 is working, it controls the pressure seat 3 to move closer to or further away from the adjusting seat 8. At least one guide shaft is also provided on the back of the pressure seat 3. The guide shaft passes through the fixing frame 12 and serves to guide the pressure seat 3 when it moves.

[0030] like Figures 5-6 As shown, a horizontally penetrating push cavity 17 is provided inside the adjusting seat 8. A guide sleeve 14 is provided at the port of the push cavity 17 facing the end of the housing 1, and the outlet mold 7 is fixed to the outside of the guide sleeve 14. A push seat 15 is slidably arranged inside the push cavity 17, and a push head 13 is provided at the end of the push seat 15. The push head 13 passes through the center of the outlet mold 7. The outer diameter of the push head 13 is equal to the outer diameter of the tube body 20.

[0031] A threaded sleeve 16 is provided at one end of the pusher 15 facing away from the outlet mold 7, and the threaded sleeve 16 is coaxially fixed with the pusher 15. The center hole of the threaded sleeve 16 is a threaded hole. A handwheel 9 is provided at one end of the adjusting seat 8 facing away from the machine cover 1. A lead screw 18 is coaxially fixed at the axle of the handwheel 9. The lead screw 18 passes through the center hole of the threaded sleeve 16 in the pushing cavity 17 and is threadedly connected to the center hole of the threaded sleeve 16. Therefore, when the handwheel 9 is turned at the adjusting seat 8, the pusher 15 can be controlled to slide in the pushing cavity 17.

[0032] When the handwheel 9 is turned, to prevent the push seat 15 from rotating within the push cavity 17, the cross-section of the push cavity 17 can be designed as a non-circular structure (such as a rectangle). For ease of processing, the cross-section of the push cavity 17 can also be designed as circular. In this case, to prevent the push seat 15 from rotating within the push cavity 17, a limiting groove can be axially opened on the surface of the push seat 15, and a limiting screw passing through the adjusting seat 8 can be provided. After passing through the adjusting seat 8, the limiting screw enters the limiting groove on the surface of the push seat 15, thus preventing the push seat 15 from rotating.

[0033] The specific working process and working principle are as follows:

[0034] First, place the tube body 20 in the groove on the surface of the tube seat 6, and then place the fittings 19 of the inlet and outlet ends of the fuse tube into the inlet mold 4 and the outlet mold 7, respectively. It should be noted that the fittings 19 in the inlet mold 4 and the outlet mold 7 are not two parts with the same structure, nor are they parts with a specific structure. Instead, they are a collective term for the metal parts at the inlet and outlet ends of the fuse tube, such as the spring connection end, the fitting and positioning part, the fuse tube clamping end, the fitting block, and the protective baffle located at the inlet end of the fuse tube; and the hinge buckle and the lower stationary contact assembly located at the outlet end of the fuse tube.

[0035] After placing the fitting 19 and the tube 20, the inlet end is pressed first. At this time, the handwheel 9 is turned so that the push head 13 at the end of the push base 15 is flush with or protrudes from the inner surface of the outlet end mold 7. Figure 7 The state is shown. The linear motor 11 is controlled via the operation panel 2, and the pressure seat 3 moves towards the adjusting seat 8. After the tube 20 contacts the fitting 19 in the inlet mold 4, the end of the tube 20 gradually enters the fitting 19. When the tube 20 is pressed to the end of the fitting 19 in the inlet mold 4, the handwheel 9 is then turned to remove the push head 13 from the outlet mold 7, leaving a distance for the tube 20 to protrude beyond the fitting 19. The linear motor 11 is controlled again via the operation panel 2, and the pressure seat 3 moves towards the adjusting seat 8, gradually pressing the tube 20 into the fitting 19 in the outlet mold 7. Because a distance is left for the tube 20 to protrude beyond the fitting 19, after the tube 20 passes through the fitting 19, it continues to be pressed until it reaches the push head 13, completing the pressing of the fuse tube outlet end. Figure 8 As shown in the figure, the pressing of the drop-out fuse tube is now complete.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A fuse tube pressing device for a drop-out fuse, comprising a workbench (5), a fuse tube body (20) placed on the surface of the workbench (5), fittings (19) respectively provided on both sides of the tube body (20), and a pressing mechanism for pressing the tube body (20) into the fittings (19) provided on the surface of the workbench (5), characterized in that: On both sides of the tube body (20), there are an inlet mold (4) and an outlet mold (7) for placing the fittings (19). The inlet mold (4) is installed on the actuating end of the pressing mechanism. An adjustment seat (8) opposite to the pressing mechanism is provided on the surface of the worktable (5). The outlet mold (7) is installed at the end of the adjustment seat (8). An adjustment mechanism for adjusting the relative position between the fittings (19) in the tube body (20) and the outlet mold (7) is provided in the adjustment seat (8).

2. The fuse tube pressing device for a drop-out fuse according to claim 1, characterized in that: A push cavity (17) is provided inside the adjusting seat (8). The push cavity (17) passes through the chamber of the adjusting seat (8). The outlet mold (7) is fixed at the port of the push cavity (17) facing the pressing mechanism. The adjusting mechanism is slidably set inside the push cavity (17).

3. The fuse tube pressing device for a drop-out fuse according to claim 1 or 2, characterized in that: The pressing mechanism includes a linear motor (11), a pressure seat (3) is installed on the motor shaft of the linear motor (11), and the inlet mold (4) is fixed on the end face of the pressure seat (3) facing the adjustment seat (8).

4. The fuse tube pressing device for a drop-out fuse according to claim 3, characterized in that: A fixed frame (12) is provided on the surface of the workbench (5). A linear motor (11) is fixed on the end face of one end of the fixed frame (12). The motor shaft of the linear motor (11) passes through the fixed frame (12) and is fixed to the pressure seat (3).

5. The fuse tube pressing device for a drop-out fuse according to claim 2, characterized in that: The adjustment mechanism includes a push seat (15) that is slidably disposed in the push cavity (17), and a push head (13) is provided at the end of the push seat (15). The push head (13) passes through the outlet mold (7) and is opposite to the tube body (20).

6. The fuse tube pressing device for a drop-out fuse according to claim 5, characterized in that: A lead screw (18) is threaded to one end of the push seat (15) facing away from the push head (13). The lead screw (18) extends to the outside of the adjusting seat (8) and is fixed coaxially with the handwheel (9).

7. The fuse tube pressing device for a drop-out fuse according to claim 6, characterized in that: A threaded sleeve (16) is coaxially fixed at one end of the pusher (15) facing away from the pusher (13). The center hole of the threaded sleeve (16) is a threaded hole. The lead screw (18) passes through the center hole of the threaded sleeve (16) and is threadedly connected to the threaded sleeve (16).

8. The fuse tube pressing device for a drop-out fuse according to claim 1, characterized in that: A tube seat (6) is also provided on the surface of the workbench (5). A groove for placing the tube body (20) is provided on the surface of the tube seat (6). The tube seat (6) is located between the inlet end mold (4) and the outlet end mold (7).

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