Butt-welding clamp of fuse

Abstract

The utility model discloses a butt-welding clamp of a fuse, which comprises two welding seats which are transversely and oppositely arranged, each welding seat is used for placing a contact knife for fixing the fuse, and a contact knife bonding pad of the contact knife is provided with at least one through hole; the butt-welding clamp further comprises at least one inserting rod. And the inserting rod is used for sequentially and transversely penetrating through the through holes of the contact knife bonding pads placed on the two welding seats, so that the two contact knife bonding pads and the fusible body welded between the contact knife bonding pads are connected into a whole. Therefore, after the fusible body is welded and fixed on the contact knife bonding pads of the two contact knives, when a product needs to be taken out from the clamp, the fusible body can be carried by taking the insertion rod, and the two ends of the insertion rod are connected and matched with the two contact knives, so that the fusible body is prevented from being stressed in the carrying process, and the fusible body can be prevented from being damaged due to stress.

Description

Technical Field

[0001] The utility model relates to the technical field of fuse production, in particular to a butt welding fixture for a fuse. Background Art

[0002] A fuse is an electrical appliance that, when the current exceeds a specified value, melts a fusible body by the heat generated by itself to disconnect the circuit. A fuse mainly consists of a fusible body, a fuse tube, and additional filling materials, etc. The structure of a traditional low-voltage fuse generally includes a fusible body, a ceramic shell, arc extinguishing materials, an outer cap, a cover plate, and a contact blade. The fusible body is placed in the shell, and the fusible body is welded to the contact blade by welding technology, and the contact blade is fixed outside the cover plate.

[0003] As Figure 1 shown, the contact blade A includes a contact blade pad A1, and usually one or two through holes A11 are provided on the contact blade pad A1 for filling arc extinguishing materials, etc.; and the fusible body B is mainly a long and straight sheet structure, and is bent at both ends for welding. During production and processing, one or more fusible bodies B are welded between two contact blade pads A1. During butt welding operation, the two contact blade pads A1 need to be fixed.

[0004] There is a prior art butt welding fixture for a fuse disclosed in Chinese Patent Publication No. CN220943855U, which has two welding seats for placing two contact blades, and can be pressed by the inner pressing plate of the pressing clamp, which is convenient for fixing the fusible body during welding. However, for products with small current, only one fusible body may need to be welded between the two contact blades. Therefore, when the product is lifted from the fixture after welding, due to the design of the fusible body itself, it is easily strained, resulting in a high defective rate of the product. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a butt welding fixture for a fuse, which can solve the problem that the fusible body is strained after welding, and has the advantages of simple structure and ensuring the qualified rate of products.

[0006] To achieve the above purpose, the solution of the utility model is:

[0007] A butt welding fixture for a fuse includes two welding seats arranged opposite to each other horizontally. Each welding seat is used for placing and fixing the contact blade of the fuse, and the contact blade pad of the contact blade has at least one through hole;

[0008] The butt welding fixture further includes at least one insertion rod; the insertion rod is used for horizontally passing through the through holes of the contact blade pads placed on the two welding seats in sequence to connect the two contact blade pads and the fusible body welded between the contact blade pads into one body.

[0009] Further, the insertion rod includes a connecting rod portion and a control portion connected to each other; an outer end of the connecting rod portion has a first threaded head, and an inner end of the connecting rod portion is connected to the control portion and has a second threaded head;

[0010] The length of the middle part of the connecting rod portion between the first threaded head and the second threaded head is equal to the distance between the contact knife pads on the two welding seats; both the first threaded head and the second threaded head are provided with external threads, and the through holes on the contact knife pads have internal threads that are threadedly engaged with the external threads.

[0011] Further, an outer end of the first threaded head is further provided with a pointed end portion with a gradually decreasing outer diameter, and no external thread is provided on the pointed end portion.

[0012] Further, the diameter of the middle part of the connecting rod portion is smaller than the diameters of the first threaded head and the second threaded head; the diameter of the control portion is smaller than the diameter of the second threaded head.

[0013] Further, there are two such through holes on the contact knife pads; and there are two insertion rods.

[0014] Further, the butt welding fixture further includes two fixing members; fixing grooves are provided on the top surfaces of the two welding seats, the two fixing members are respectively movably fitted in the fixing grooves, and the contact knives are placed in the fixing grooves and are movably fixed by the fixing members.

[0015] Further, the fixing grooves extend horizontally on the welding seats; the contact knife further includes a contact knife handle, the two contact knives are arranged opposite to each other, and the contact knife handles are respectively located in two relatively distributed fixing grooves; the fixing members include a pressing frame and a locking member, the pressing frame is erected on the welding seat, and the pressing frame has an inner pressing plate that is movably inserted into the fixing groove, and the front side surface in the longitudinal direction of the inner pressing plate contacts the contact knife handle inserted into the fixing groove, the locking member is fitted in the pressing frame, the pressing frame moves longitudinally back and forth after the locking member is screwed, and the inner pressing plate moves longitudinally to press the contact knife handle, so that the contact knife is clamped and positioned in the fixing groove.

[0016] Further, the locking member is a wing bolt, the wing bolt includes a bolt portion and a wing nut provided at an outer end of the bolt portion, the bolt portion passes through the pressing frame and the welding seat from outside to inside, and the inner end of the bolt portion is located behind the inner pressing plate; and a compression spring is further sleeved on the bolt portion, and two ends of the compression spring respectively abut against the outer wall of the welding seat and the pressing frame.

[0017] Further, the fixing groove extends horizontally on the welding base; the contact knife further includes a contact knife locking platform, and a locking hole is provided on the end face of the contact knife locking platform; two contact knives are arranged opposite to each other, and the contact knife locking platforms are respectively located in two relatively distributed fixing grooves; the fixing member includes a fixing base and a locking bolt, the fixing base is located in the fixing groove and on the lateral outside of the contact knife locking platform, the locking bolt is a butterfly bolt, the butterfly bolt horizontally movably penetrates through the fixing base, and the bolt locking part of the butterfly bolt is used to movably lock into the locking hole of the contact knife locking platform, so that the contact knife is locked and positioned in the fixing groove.

[0018] Further, the butt welding fixture further includes a hand grip, and connection parts are formed at both ends of the hand grip; sliding grooves are respectively provided at the bottoms of the two welding bases, and the connection parts are slidably fitted in the sliding grooves, so that the two welding bases are slidably and positioned and assembled at both ends of the hand grip.

[0019] After adopting the above technical solution, after the fusible body is welded and fixed to the contact knife pads of the two contact knives, when the product needs to be taken out of the fixture, it can be carried by taking the insertion rod. By using the connection and cooperation between the two ends of the insertion rod and the two contact knives, the force on the fusible body during the handling process is avoided, and the fusible body can be prevented from being damaged by force. Of course, since the two contact knives are already integrated with the insertion rod, at this time, it can also be carried by directly taking one of the contact knives, and the purpose of not damaging the fusible body during handling can also be achieved. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of two existing contact knives and a fusible body;

[0021] Figure 2 It is a perspective view of Embodiment 1 of the present utility model;

[0022] Figure 3 It is a schematic diagram of product separation of Embodiment 1 of the present utility model;

[0023] Figure 4 It is a perspective schematic diagram of the insertion rod of Embodiment 1 of the present utility model;

[0024] Figure 5 It is a side view of Embodiment 1 of the present utility model;

[0025] Figure 6 It is an exploded view of Embodiment 1 of the present utility model;

[0026] Figure 7 It is a perspective view of Embodiment 2 of the present utility model;

[0027] Figure 8 It is a schematic diagram of product separation of Embodiment 2 of the present utility model;

[0028] Figure 9 It is a top view of Embodiment 2 of the present utility model;

[0029] Figure 10 This is a cross-sectional view of Embodiment 2 of the present utility model.

[0030] Reference numerals description: welding seat 1, fixing groove 11, side plate 12, first screw hole 121, middle connecting plate 13, sliding groove 14, slider 141, sliding groove locking hole 1411, inserting rod 2, connecting rod part 21, first threaded head 211, second threaded head 212, middle part of connecting rod part 213, pointed end part 214, operating part 22, fixing part 3, pressing frame 31, inner pressing plate 311, outer pushing plate 312, connecting plate 313, second screw hole 314, locking part 32, bolt part 321, butterfly nut 322, compression spring 33, fixing seat 34, locking bolt 35, bolt locking part 351, hand grip 4, connecting part 41, long hole 411, contact knife A, contact knife pad A1, through hole A11, contact knife handle A2, contact knife locking table A3, locking hole A31, fusible body B. Specific embodiments

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0032] Embodiment 1

[0033] As Figures 2 to 6 shown, a butt welding jig for a fuse in this embodiment includes two welding seats 1 arranged horizontally opposite to each other and at least one inserting rod 2. Each welding seat 1 is used to place and fix the contact knife A of the fuse, and the contact knife pad A1 of the contact knife A has at least one through hole A11; in this embodiment, each contact knife pad A1 has two centrally symmetric through holes A11, and correspondingly, two inserting rods 2 are taken as an example.

[0034] When two contact knives A are respectively placed on the two welding seats 1, the through holes A11 of the two horizontal contact knife pads A1 can be aligned left and right. And the inserting rod 2 can sequentially pass through the through holes A11 of the contact knife pads A1 placed on the two welding seats 1 horizontally, connecting the fusible body B welded between the two contact knife pads A1 and the contact knife pads A1 into one body.

[0035] Thereby, after the fusible body B is welded and fixed to the contact pads A1 of the two contact blades A, when it is necessary to take out the product from the fixture, it can be carried by holding the insertion rod 2. By utilizing the connection and cooperation between the two ends of the insertion rod 2 and the two contact blades A, the force on the fusible body B during the handling process is avoided, and the fusible body B can be prevented from being damaged by force. Of course, since the two contact blades A are already integrated with the insertion rod 2, at this time, it is also possible to carry it by directly holding one of the contact blades A, and the purpose of not damaging the fusible body B during handling can also be achieved.

[0036] Specifically, as Figure 4 shown, the insertion rod 2 of this embodiment includes a connecting rod portion 21 and a control portion 22 connected to each other; the outer end of the connecting rod portion 21 has a first threaded head 211, and the inner end of the connecting rod portion 21 is connected to the control portion 22 and has a second threaded head 212; the length of the middle portion 213 of the connecting rod between the first threaded head 211 and the second threaded head 212 is equal to the distance between the contact pads A1 on the two welding seats 1; both the first threaded head 211 and the second threaded head 212 are provided with external threads (shown in a simplified drawing), and the through hole A11 on the contact pad A1 has an internal thread that is threadedly engaged with the external thread.

[0037] Thus, when inserting the insertion rod 2, by rotating the control portion 22, the first threaded head 211 can be rotated through the through hole A11 of the first contact pad A1, and then locked to the through hole A11 of the second contact pad A1. After that, the second threaded head 212 can also be locked into the through hole A11 of the first contact pad A1, thereby improving the stability of the integrated connection between the insertion rod 2 and the two contact blades A, making the handling operation more convenient, preventing the contact blade A from sliding on the insertion rod 2, and enhancing the protection effect on the fusible body B.

[0038] In this embodiment, a pointed end portion 214 with a gradually decreasing outer diameter may be provided at the outer end of the first threaded head 211, and the external thread may not be provided on the pointed end portion 214. By providing the pointed end portion 214, it is convenient for the insertion rod 2 to be inserted into the through hole A11 in alignment.

[0039] Moreover, the diameter of the middle portion 213 of the connecting rod may be smaller than the diameters of the first threaded head 211 and the second threaded head 212; the diameter of the control portion 22 may be smaller than the diameter of the second threaded head 212.

[0040] Referring again to Figure 2 and Figure 3 shown, the butt welding fixture further includes two fixing members 3; fixing grooves 11 are provided on the top surfaces of the two welding seats 1, and the two fixing members 3 are respectively movably fitted in the fixing grooves 11, and the contact blades A are placed in the fixing grooves 11 and are movably fixed by the fixing members 3.

[0041] Referring to Figure 5 and Figure 6, the fixing groove 11 extends horizontally on the welding seat 1; the contact knife A further includes a contact knife handle A2, two contact knives A are arranged opposite to each other, and the contact knife handles A2 are respectively located in two relatively distributed fixing grooves 11; the fixing member 3 includes a pressing frame 31 and a locking member 32, the pressing frame 31 is erected on the welding seat 1, and the pressing frame 31 has an inner pressing plate 311 that is movably inserted into the fixing groove 11, and the front side surface of the inner pressing plate 311 in the longitudinal direction contacts the contact knife handle A2 inserted into the fixing groove 11. The locking member 32 is fitted in the pressing frame 31. After the locking member 32 is screwed, the pressing frame 31 moves longitudinally back and forth. After the inner pressing plate 311 moves longitudinally, it presses the contact knife handle A2, so that the contact knife A is clamped and positioned in the fixing groove 11.

[0042] Specifically, the locking member 32 is a wing bolt, and the wing bolt includes a bolt portion 321 and a wing nut 322 provided at the outer end of the bolt portion 321; the welding seat 1 may include a middle connecting plate 13 connected between two side plates 12, and the fixing groove 11 is formed by enclosing the two side plates 12 and the middle connecting plate 13. A first screw hole 121 through which the bolt portion 321 can pass is provided on one of the side plates 12; the pressing frame 31 can be a "U" - shaped block, and the pressing frame 31 may include the inner pressing plate 311 and the outer pushing plate 312 that are parallel. The inner pressing plate 311 and the outer pushing plate 312 are connected by a connecting plate 313. The connecting plate 313 is vertically connected to one end of the inner pressing plate 311 and the outer pushing plate 312, and a second screw hole 314 through which the bolt portion 321 can pass is provided in the outer pushing plate 312.

[0043] The bolt portion 321 can pass through the pressing frame 31 and the welding seat 1 from outside to inside, and the inner end of the bolt portion 321 is located behind the inner pressing plate 311; and a compression spring 33 may also be sleeved on the bolt portion 321, and both ends of the compression spring 33 are respectively abutted against the outer wall of the welding seat 1 and the outer pushing plate 312 of the pressing frame 31.

[0044] Thus, by turning the wing bolt, the pressing frame 31 can be driven to move horizontally to press and fix the contact knife handle A2 in the fixing groove 11, and the compression spring 33 provides elastic force to assist the reset of the pressing frame 31 when it is loosened.

[0045] Such as Figure 6 , the butt - welding fixture further includes a hand - grip 4, and connection portions 41 are formed at both ends of the hand - grip 4; the bottoms of the two welding seats 1 respectively have sliding grooves 14, and the connection portions 41 are slidably fitted in the sliding grooves 14, so that the two welding seats 1 are slid and positioned and assembled at both ends of the hand - grip 4. Specifically, the connection portion 41 may be provided with a long - slot hole 411, and a slider 141 may be fixed in the sliding groove 14, and a sliding - groove lock hole 1411 is provided on the slider 141. Thus, an adjusting bolt (not shown in the figure) can be used to pass through the long - slot hole 411 and the sliding - groove lock hole 1411, and the sliding and positioning of the welding seat 1 on the connection portion 41 can be realized.

[0046] Thus, the distance adjustment between the two welding seats 1 can be facilitated, and it can be used for the butt welding operation of fuses of different specifications.

[0047] Embodiment 2

[0048] As Figures 7 to 10 , the structure of this embodiment is basically the same as that of the above embodiment, and the main difference lies in:

[0049] The structure of the contact knife A in this embodiment is different, and correspondingly, the structures of the fixing groove 11 and the fixing member 3 are also different.

[0050] The contact knife A includes a contact knife pad A1 and a contact knife locking platform A3, and a locking hole A31 is provided on the end surface of the contact knife locking platform A3; two contact knives A are arranged opposite to each other, and the contact knife locking platforms A3 are respectively located in two relatively distributed fixing grooves 11.

[0051] The fixing member 3 in this embodiment includes a fixing seat 34 and a locking bolt 35. The fixing seat 34 is located in the fixing groove 11 and is located laterally outside the contact knife locking platform A3. The locking bolt 35 is a butterfly bolt, and the butterfly bolt passes through the fixing seat 34 laterally. The bolt locking portion 351 of the butterfly bolt is used to movably lock into the locking hole A31 of the contact knife locking platform A3, so as to lock and position the contact knife A in the fixing groove 11.

[0052] Thereby, by rotating the locking bolt 35, the fixing and loosening of the contact knife A can be realized through the locking hole A31 of the contact knife locking platform A3.

[0053] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, equivalent changes and modifications made without departing from the principle of the present invention should still fall within the protection scope of the present invention.

[0054] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0055] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

[0056] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

Claims

1. A fuse welding fixture, comprising two welding seats disposed laterally opposite to each other, each welding seat being used to place and fix a contact blade of the fuse, wherein the contact blade pad of the contact blade has at least one through hole; characterized in that: The butt welding fixture also includes at least one insertion rod; the insertion rod is used to sequentially and transversely penetrate through the through holes of the contact blade pads placed on the two welding seats to connect the two contact blade pads and the fusible body welded between the contact blade pads into one.

2. A fuse welding fixture according to claim 1, characterized in that: The insertion rod comprises a connecting rod portion and a control portion connected to each other; the outer end of the connecting rod portion has a first thread head, and the inner end of the connecting rod portion is connected to the control portion and has a second thread head; The length of the middle part of the connecting rod between the first thread head and the second thread head is equal to the spacing between the contact blade pads on the two welding seats; both the first thread head and the second thread head are provided with external threads, and the through hole on the contact blade pad has an internal thread that is threadedly matched with the external thread.

3. A fuse welding fixture according to claim 2, characterized in that: The outer end of the first thread head is also provided with a tip portion with a gradually reduced outer diameter, and the tip portion is not provided with an external thread.

4. A fuse welding fixture according to claim 2, characterized in that: The diameter of the middle portion of the connecting rod portion is smaller than the diameters of the first thread head and the second thread head; the diameter of the control portion is smaller than the diameter of the second thread head.

5. The fuse welding fixture according to claim 1, characterized in that: The contact blade pad is provided with two through holes; and there are two insertion rods.

6. A fuse welding fixture according to claim 1, characterized in that: The butt welding fixture also includes two fixing parts; the top surfaces of the two welding seats are provided with fixing grooves, the two fixing parts are movably matched in the fixing grooves respectively, and the touch knife is placed in the fixing grooves and is movably fixed by the fixing parts.

7. A fuse welding fixture according to claim 6, characterized in that: The fixing groove extends transversely on the welding seat; the touch knife also includes a touch knife handle, the two touch knives are arranged opposite to each other, and the touch knife handles are respectively located in two oppositely distributed fixing grooves; the fixing member includes a clamping frame and a locking member, the clamping frame is mounted on the welding seat, and the clamping frame has an inner pressure plate that is movably inserted into the fixing groove, and the longitudinal front side of the inner pressure plate contacts the touch knife handle inserted into the fixing groove, the locking member is matched in the clamping frame, and the clamping frame moves longitudinally forward and backward after the locking member is twisted, and the inner pressure plate presses the touch knife handle after the longitudinal movement, so that the touch knife is clamped and positioned in the fixing groove.

8. A fuse welding fixture according to claim 7, characterized in that: The locking piece is a butterfly bolt, which includes a bolt part and a butterfly nut arranged at the outer end of the bolt part. The bolt part passes through the clamping frame and the welding seat from the outside to the inside, and the inner end of the bolt part is located behind the inner pressure plate; and a compression spring is also sleeved on the bolt part, and both ends of the compression spring are distributed against the outer wall of the welding seat and the clamping frame.

9. A fuse welding fixture according to claim 6, characterized in that: The fixing groove extends transversely on the welding seat; the touch knife also includes a touch knife locking platform, and a locking hole is provided on the end surface of the touch knife locking platform; the two touch knives are arranged opposite to each other, and the touch knife locking platforms are respectively located in two relatively distributed fixing grooves; the fixing member includes a fixing seat and a locking bolt, the fixing seat is located in the fixing groove and is located laterally on the outside of the touch knife locking platform, the locking bolt is a butterfly bolt, the butterfly bolt is laterally movably inserted into the fixing seat, and the bolt locking portion of the butterfly bolt is used to movably lock into the locking hole of the touch knife locking platform, so that the touch knife is locked and positioned in the fixing groove.

10. A fuse welding fixture according to claim 1, characterized in that: The butt welding fixture also includes a handle, and connecting parts are formed at both ends of the handle; the bottoms of the two welding seats are respectively provided with slide grooves, and the connecting parts are slidably matched in the slide grooves, so that the two welding seats are slidably and positioned and assembled at the two ends of the handle.

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