Conductor fuse connector of a fuse

Abstract

The invention discloses a conductor fuse connector for a fuse, and relates to the technical field of conductor fuse connection. The invention comprises a protection tube, wherein a plurality of fuse tubes are radially and slidably connected in the protection tube in a radial direction, and each fuse tube has a central position coaxial with the protection tube in a sliding stroke relative to the protection tube; both ends of the protection tube are rotatably connected with end seals, and common contacts are respectively arranged at the centers of the two end seals, and the split contacts at both ends of the fuse tube at the central position are conductively abutted and matched with the two common contacts in a one-to-one correspondence; at least one end seal is fixedly connected with a guide rail, and the guide rail comprises an arc segment coaxial with the protection tube and two centripetal segments, and the two centripetal segments are bent and connected to a position close to the axis of the protection tube; each fuse tube is slidably connected with the guide rail, and when the fuse tube moves along the guide rail to the connection point of the two centripetal segments, it reaches the central position, so that in the process of the rotation of the protection tube relative to the end seal, each fuse tube can be driven to move and switch to the central position in sequence.

Description

Technical Field

[0001] The invention relates to the technical field of conductor fuse connection, in particular to a conductor fuse connector of a fuse. Background Art

[0002] In modern electrical systems, fuses are an important overcurrent protection device and are widely used in power distribution, electronic equipment, industrial control systems and other fields. The fuse conductor fuse connector is a key component for the normal operation of the fuse and effective protection of the circuit. The main function is to quickly cut off the circuit by melting the conductor fuse based on the thermal effect of the current when an overload current occurs in the circuit, so as to protect electrical equipment and lines from damage.

[0003] In the prior art, a fuse is usually equipped with only one fuse tube. After the fuse tube is blown or reaches its scrap period, it needs to be removed and replaced with a new one. This operation is not convenient and will result in a long power-off interval for the equipment. Summary of the invention

[0004] The object of the present invention is to provide a conductor fuse connector of a fuse to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a conductor fuse connector of a fuse, comprising a protection tube, in which a plurality of fuse tubes are radially and slidably connected in a radial direction in the protection tube, and each fuse tube has a central position coaxial with the protection tube in the sliding stroke relative to the protection tube; end seals are rotatably connected at both ends of the protection tube, and common contacts are respectively arranged at the centers of the two end seals, and the split contacts at both ends of the fuse tube at the central position are conductively abutted and matched with the two common contacts in a one-to-one correspondence; a guide rail is fixedly connected to at least one end seal, and the guide rail comprises an arc segment coaxial with the protection tube, and the two ends of the arc segment are respectively connected to centripetal segments, and the two centripetal segments are bent and connected to a position close to the axis of the protection tube; each fuse tube is slidably connected to the guide rail, and when the fuse tube moves along the guide rail to the connection point of the two centripetal segments, it reaches the central position, so that in the process of the rotation of the protection tube relative to the end seal, each fuse tube can be driven to move and switch to the central position in sequence.

[0006] Furthermore, a non-stop switching component is respectively provided on the two common contacts, and the non-stop switching component includes a conductive rod which is rotatably connected to the corresponding common contact. During the rotation of the conductive rod relative to the common contact, there is an early conduction position which is conductively connected with the split contact of the next fuse tube to be switched to the center position.

[0007] Furthermore, the non-stop power switching component also includes a limit rod, a third elastic member and a fourth elastic member. The process of the third elastic member restoring its deformation drives the conductive rod to move to the early conduction position, and the limit rod is slidably connected to the end seal. The process of the fourth elastic member restoring its deformation drives the limit rod to slide to block the rotation path of the conductive rod.

[0008] Furthermore, a through hole is provided on the side surface of the end seal, an operating rod is fixedly connected to the limiting rod, and the operating rod is slidably connected in the through hole.

[0009] Furthermore, the circumferential side surface of each of the fuse tubes is fixedly connected to a track ring, a double ball head connector is arranged between the track ring and the guide rail, a first ball groove is opened on the circumferential side surface of the track ring, a second ball groove is opened on the inner side of the guide rail, the ball head at one end of the double ball head connector is slidably connected in the first ball groove, and the ball head at the other end is slidably connected in the second ball groove.

[0010] Furthermore, a bracket is fixedly connected inside the protection tube, and a plurality of radial slide grooves are provided on the bracket. Slide blocks are fixedly connected to each fuse tube, and each slide block is slidably matched with each slide groove in a one-to-one correspondence.

[0011] Furthermore, the bracket has a plurality of positioning holes corresponding to the slide grooves one by one, the end seal is slidably connected with a wedge rod, and a second elastic member is arranged between the end seal and the wedge rod. When one of the fuse tubes moves to the center position, the second elastic member drives the wedge rod to slide relative to the end seal to be inserted into one of the positioning holes. When the protection tube continues to rotate to switch the fuse tube, the inclined surface of the wedge rod slides and abuts against the inner wall of the positioning hole so that the wedge rod overcomes the elastic force of the second elastic member and disengages from the current positioning hole.

[0012] Furthermore, the common contact includes a first contact and a second contact, the first contact is fixedly connected to the end seal, the first contact and the second contact are conductively and slidably connected and a first elastic member is provided, and the elastic force of the first elastic member drives the second contact to conductively abut and cooperate with the split contact of the fuse tube located at the center station.

[0013] Furthermore, both end seals are provided with positioning structures, and the positioning structures are used to position and lock the end seals with the fuse housing.

[0014] Furthermore, the number of the fuse tubes is 2-6.

[0015] In the above technical solution, the present invention provides a conductor fuse connector of a fuse, which has multiple replaceable fuse tubes. When the current fuse tube is blown or reaches the scrap period, the current fuse tube can be separated from the central station and disconnected from the common contact by simply rotating the protective tube, and the spare fuse tube immediately moves to the central station and is conductively connected to the common contact, thereby realizing rapid replacement of the fuse tube, simple operation and short power-off interval of the equipment. In addition, the central station and the common contact are located on the axis of the protective tube and the end seal, which can facilitate the conductive contact between the common contact of the conductor fuse connector and the electrode contact of the fuse housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0018] Figure 2 A structural cross-sectional view provided for an embodiment of the present invention;

[0019] Figure 3 The embodiment of the present invention provides Figure 2 A magnified view of the A-touch structure;

[0020] Figure 4 The internal structure of the embodiment of the present invention is shown in FIG. Figure I ;

[0021] Figure 5 The internal structure of the embodiment of the present invention is shown in FIG. Figure II ;

[0022] Figure 6 The internal structure of the embodiment of the present invention is shown in FIG. Figure III ;

[0023] Figure 7 A schematic diagram of the structure of a fuse tube provided by an embodiment of the present invention;

[0024] Figure 8 A schematic structural diagram of a conductive rod provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Protective tube; 2. End seal; 3. Common contact; 3.1. First contact; 3.2. Second contact; 3.3. First elastic member; 4. Bracket; 5. Fuse tube; 5.1. Split contact; 6. Track ring; 7. Guide rail; 7.1. Arc segment; 7.2. Centripetal segment; 8. Double ball connector; 9. Non-stop power switching assembly; 9.1. Conductive rod; 9.2. Limit rod; 9.3. Bump; 9.4. Fourth elastic member; 9.5. Operating rod; 10. Positioning hole; 11. Wedge rod; 12. Second elastic member; 13. Positioning groove. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1-8 A conductor fuse connector of a fuse provided in an embodiment of the present invention comprises a protection tube 1, wherein a plurality of fuse tubes 5 are radially and slidably connected in the protection tube 1. Specifically, a bracket 4 is fixedly connected in the protection tube 1, and a plurality of radial slide grooves are provided on the bracket 4. A slider is fixedly connected to each fuse tube 5, and each slider slides in a one-to-one correspondence with each slide groove. The number of fuse tubes 5 is preferably 2-6, and more can be provided in theory. In this embodiment, the number of fuse tubes 5 is 3. Each fuse tube 5 has a center position coaxial with the protection tube 1 in the sliding stroke relative to the protection tube 1, and the center positions of each fuse tube 5 overlap, and only one fuse tube 5 can slide to the center position at a time.

[0029] The two ends of the protection tube 1 are rotatably connected with the end seals 2, and the centers of the two end seals 2 are respectively provided with common contacts 3. The split contacts 5.1 at the two ends of the fuse tube 5 at the center station are in conductive contact with the two common contacts 3 in a one-to-one correspondence; specifically, the common contact 3 includes a first contact 3.1 and a second contact 3.2, the first contact 3.1 is fixedly connected to the end seal 2, the first contact 3.1 and the second contact 3.2 are conductively slidably connected and a first elastic member 3.3 is provided, and the first elastic member 3.3 is preferably a first compression spring, which is arranged between the first contact 3.1 and the second contact 3.2, one end of which is in contact with the first contact 3.1, and the other end is in contact with the second contact 3.2. The elastic force of the first elastic member 3.3 drives the second contact 3.2 to be in conductive contact with the split contact 5.1 of the fuse tube 5 at the center station, which can promote sufficient conductive contact between the common contact 3 and the split contact 5.1, and improve the conductive stability.

[0030] A guide rail 7 is fixedly connected to one of the end seals 2 (or both end seals 2), and the guide rail 7 includes an arc segment 7.1 coaxial with the protection tube 1, and the two ends of the arc segment 7.1 are respectively connected to a centripetal segment 7.2, and the two centripetal segments 7.2 are bent and connected to a position close to the axis of the protection tube 1. Each fuse tube 5 is slidably connected to the guide rail 7. Specifically, a track ring 6 is fixedly connected to the circumferential side of each fuse tube 5, and a double ball head connector 8 is provided between the track ring 6 and the guide rail 7. A first ball groove is provided on the circumferential side of the track ring 6, and a second ball groove is provided on the inner side of the guide rail 7. The ball head at one end of the double ball head connector 8 is slidably connected in the first ball groove, and the ball head at the other end is slidably connected in the second ball groove.

[0031] The bracket 4 is provided with a plurality of positioning holes 10 corresponding to each slide groove one by one, and a wedge rod 11 is slidably connected to the end seal 2. A second elastic member 12 is arranged between the end seal 2 and the wedge rod 11. The second elastic member 12 is preferably a second compression spring, one end of the second compression spring abuts against the end seal 2, and the other end abuts against the wedge rod 11. When the protection tube 1 rotates along the first direction to move one of the fuse tubes 5 to the center position, the second elasticity drives the wedge rod 11 to slide relative to the end seal 2 to be inserted into one of the positioning holes 10. When the protection tube 1 continues to rotate along the first direction to switch the fuse tube 5, the inclined surface of the wedge rod 11 slides and abuts against the inner wall of the positioning hole 10 so that the wedge rod 11 overcomes the elastic force of the second elastic member 12 and disengages from the current positioning hole 10.

[0032] By rotating the protection tube 1 in the first direction, the damaged or scrapped fuse tube 5 at the center station is moved away from the center station, and the next spare fuse tube 5 moves along the guide rail 7 to the connection between the two centripetal sections 7.2, that is, reaches the center station, so that during the rotation of the protection tube 1 relative to the end seal 2, each fuse tube 5 can be driven to move and switch to the center station in sequence.

[0033] It should be emphasized that the wedge rod 11 has a wedge surface only on one side. After the wedge rod 11 is inserted into the positioning hole 10, it can prevent the protection tube 1 from rotating in the first direction, that is, avoid reversal, so that the protection tube 1 can only rotate in a single direction, preventing the previously switched, blown or scrapped fuse tube 5 from being installed back to the center position again, causing a fuse failure.

[0034] In addition, a target mark is provided on the end seal 2, and multiple identity marks are provided at equal intervals on the circumference of the protection tube 1. Each identity mark corresponds to each fuse tube 5. When a fuse tube 5 is in the center position, the identity mark corresponding to the fuse tube 5 coincides with the target mark, thereby providing feedback that the fuse tube 5 has been installed in place. The identity marks of each fuse tube 5 may be the same or different. If they are different, it is helpful to record the use of each fuse tube 5 (connected to the common contact 3 at the center position) to avoid repeated use of fuse tubes 5.

[0035] A conductor fuse connector of a fuse provided by the present invention has a plurality of replaceable fuse tubes 5. When the current fuse tube 5 is blown or reaches its scrapping deadline, the current fuse tube 5 can be separated from the central station and disconnected from the common contact 3 by simply rotating the protective tube 1, and the spare fuse tube 5 can be immediately moved to the central station and conductively connected to the common contact 3, thereby realizing rapid replacement of the fuse tube 5, simple operation and short power-off interval of the equipment.

[0036] The conductor fuse connector is snap-fitted into the fuse housing. Specifically, a tubular receiving groove matched with the protective tube 1 and the end seal 2 of the conductor fuse connector is provided on the fuse housing. Electrode contacts are provided at the axis at both ends of the receiving groove. When the conductor fuse connector is pressed into the receiving groove until the outer wall of the protective tube 1 fits with the inner wall of the receiving groove, the two common contacts 3 of the conductor fuse connector and the two electrode contacts in the receiving groove are conductively abutted and matched one by one. Moreover, since the center position and the common contacts 3 are located on the axis of the protective tube 1 and the end seal 2, there is no need to deliberately adjust the orientation of the conductor fuse connector during installation, and the conductor fuse connector is allowed to rotate relative to the receiving groove. Therefore, the conductor fuse connector can be easily installed into the fuse housing to maintain a stable electrical connection between the common contacts 3 and the electrode contacts.

[0037] Both end seals 2 of the conductor fuse connector are provided with positioning structures, such as positioning grooves 13, and elastic buckles are provided in the accommodating grooves. When the protection tube 1 is rotated, the friction between the protection tube 1 and the end seal 2 may drive the end seal 2 to rotate, so that the positioning grooves 13 on the end seal 2 are aligned with the elastic buckle, and the elastic buckle is snapped into the positioning grooves 13, so that the end seal 2 and the fuse housing are positioned and locked, and the end seal 2 cannot rotate relative to the housing. In this way, when the protection tube 1 is rotated, the end seal 2 will not be driven to move together, so that the protection tube 1 rotates relative to the end seal 2, thereby realizing the switching of each fuse tube 5.

[0038] In another embodiment provided by the present invention, two common contacts 3 are respectively provided with non-stop switching components 9, which include a conductive rod 9.1, a limit rod 9.2, a third elastic member and a fourth elastic member 9.4. The conductive rod 9.1 is connected to the corresponding common contact 3 in a conductive and rotatable manner. During the rotation of the conductive rod 9.1 relative to the common contact 3, there is an early conduction position for conductively blocking the split contact 5.1 of the next fuse tube 5 to be switched to the center position. The conductive rod 9.1 has a side block, which can block the side of the split contact 5.1 of the fuse tube 5 being switched to the center position, and the conductive rod 9.1 abuts against the end face of the split contact 5.1. The third elastic member is preferably a torsion spring, which is coaxially arranged with the common contact 3, one end of which is fixedly connected to the common contact 3, and the other end is fixedly connected to the conductive rod 9.1. The process of the third elastic member restoring its deformation drives the conductive rod 9.1 to move to the early conduction position, and the limit rod 9.2 is slidably connected to the end seal 2. The fourth elastic member 9.4 is preferably a tension spring, one end of which is connected to the end seal 2, and the other end is connected to the limit rod 9.2 or the operating rod 9.5. The process of the fourth elastic member 9.4 restoring its deformation drives the limit rod 9.2 to slide to block the rotation path of the conductive rod 9.1, specifically to block the protrusion 9.3 on the conductive rod 9.1, so that the third elastic member can be kept in the state of energy storage, preventing the conductive rod 9.1 from rotating to the early conduction position. A through hole is provided on the side of the end seal 2, and an operating rod 9.5 is fixedly connected to the limit rod 9.2, and the operating rod 9.5 is slidably connected in the through hole.

[0039] In this embodiment, when the currently used fuse tube 5 reaches the scrapping deadline and needs to be forcibly scrapped, there is no need to shut down the equipment and the fuse. It is only necessary to press the two operating rods 9.5 at the same time (or press them one after another) to make the two limit rods 9.2 disengage from the blocking connection with the protrusions 9.3 of the corresponding conductive rods 9.1, so that the two conductive rods 9.1 are rotated to their respective early conduction positions under the elastic force of their respective third elastic members, and the side surfaces of the split contacts 5.1 at both ends of the next fuse tube 5 to be switched to the central position (called the first spare fuse tube 5) are conductively blocked and matched with the side blocks of the two conductive rods 9.1 one by one, and the end surfaces of the two split contacts 5.1 are also conductively grounded and matched with the corresponding conductive rods 9.1, so that the fuse tube 5 located at the central position and the first spare fuse tube 5 are connected in parallel through the two conductive rods 9.1, and the two common contacts 3 are still in a conductive connection state, such as Figure 4Then quickly release the pressure on the two operating rods 9.5, rotate the protection tube 1, so that the scrapped fuse tube 5 at the current center position moves away from the center position and separates from the conductive rod 9.1, and at the same time, the first spare fuse tube 5 moves and switches to the center position. During the movement of the first spare fuse tube 5 to the center position, the split contact 5.1 of the first spare fuse tube 5 moving along the track abuts against the side block of the conductive rod 9.1 through the entire sliding contact, so that the conductive rod 9.1 rotates relative to the common contact 3, and the third elastic member is therefore energized. During this period, the split contact 5.1 of the first spare fuse tube 5 and The conductive rod 9.1 maintains conductive connection throughout the entire process until the first spare fuse tube 5 moves to a position close to the center, and the projection 9.3 on the conductive rod 9.1 and the inclined surface of the wedge block on the limiting rod 9.2 slide into contact and cooperate, so that the limiting rod 9.2 overcomes the elastic force of the fourth elastic member 9.4 to avoid the projection 9.3 on the conductive rod 9.1. After the first spare fuse tube 5 moves to the center, the projection 9.3 on the conductive rod 9.1 has also passed over the inclined surface of the wedge block on the limiting rod 9.2, and the fourth elastic member 9.4 resets the limiting rod 9.2 to block the conductive rod 9.1. Figure 5 , so that the conductive rod 9.1 is not turned back to the early conduction position due to the elastic potential energy of the third elastic member, ensuring that after the fuse tube 5 is switched, only the fuse tube 5 currently located at the center position is conductively connected between the two common contacts 3.

[0040] The premise of switching the fuse tube 5 is that both operating levers 9.5 are pressed to realize the parallel connection between the fuse tube 5 located at the center station and the first standby fuse tube 5 through the two conductive rods 9.1. If any operating lever 9.5 is pressed alone, the parallel connection effect cannot be achieved, thereby having a good anti-misoperation effect. It is also to ensure that during normal operation of the fuse, only the fuse tube 5 currently located at the center station is conductively connected between the two common contacts 3. At the same time, it should be noted that the time interval from pressing the two operating levers 9.5 to the completion of the rotation of the protection tube 1 should be shortened as much as possible, preferably within 3 seconds, that is, the two fuse tubes 5 can only be operated in parallel for a short time.

[0041] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A conductor fuse connector of a fuse, characterized in that: It comprises a protection tube, in which a plurality of fuse tubes are radially and slidably connected in a radial direction, and each fuse tube has a central position coaxial with the protection tube in the sliding stroke relative to the protection tube; The two ends of the protection tube are rotatably connected with end seals, and the centers of the two end seals are respectively provided with common contacts, and the split contacts at the two ends of the fuse tube at the center position are in conductive contact with the two common contacts in a one-to-one correspondence; A guide rail is fixedly connected to at least one end seal, the guide rail comprises an arc segment coaxial with the protection tube, both ends of the arc segment are respectively connected to centripetal segments, and the two centripetal segments are bent toward a position close to the axis of the protection tube and connected; Each fuse tube is slidably connected to the guide rail. When the fuse tube moves along the guide rail to the connection of the two centripetal sections, it reaches the central position, so that during the rotation of the protection tube relative to the end seal, each fuse tube can be driven to move and switch to the central position in sequence; The two common contacts are respectively provided with an uninterrupted power switching assembly, which includes a conductive rod that is electrically and rotatably connected to the corresponding common contact, and the conductive rod has an early conduction position that is electrically connected with the split contact of the next fuse tube to be switched to the center position during the rotation of the conductive rod relative to the common contact; The non-stop power switching assembly also includes a limit rod, a third elastic member and a fourth elastic member. The process of the third elastic member restoring its deformation drives the conductive rod to move to the early conduction position, and the limit rod is slidably connected to the end seal. The process of the fourth elastic member restoring its deformation drives the limit rod to slide to block the rotation path of the conductive rod.

2. The conductor fuse connector of a fuse according to claim 1, characterized in that: A through hole is provided on the side of the end seal, an operating rod is fixedly connected to the limit rod, and the operating rod is slidably connected in the through hole.

3. The conductor fuse connector of a fuse according to claim 1, characterized in that: The circumferential side surface of each fuse tube is fixedly connected to a track ring, a double ball head connector is arranged between the track ring and the guide rail, a first ball groove is opened on the circumferential side surface of the track ring, a second ball groove is opened on the inner side of the guide rail, the ball head at one end of the double ball head connector is slidably connected in the first ball groove, and the ball head at the other end is slidably connected in the second ball groove.

4. The conductor fuse connector of a fuse according to claim 1, characterized in that: A bracket is fixedly connected inside the protection tube, and a plurality of radial slide grooves are arranged on the bracket. Slide blocks are fixedly connected to each fuse tube, and each slide block is slidably matched with each slide groove in a one-to-one correspondence.

5. The conductor fuse connector of a fuse according to claim 4, characterized in that: The bracket is provided with a plurality of positioning holes corresponding to each slide groove one by one, and a wedge-shaped rod is slidably connected to the end seal, and a second elastic member is arranged between the end seal and the wedge-shaped rod. When the protection tube rotates to move one of the fuse tubes to the center position, the second elastic member drives the wedge-shaped rod to slide relative to the end seal to be inserted into one of the positioning holes. When the protection tube continues to rotate to switch the fuse tube, the inclined surface of the wedge-shaped rod slides and abuts against the inner wall of the positioning hole to enable the wedge-shaped rod to overcome the elastic force of the second elastic member and detach from the current positioning hole.

6. The conductor fuse connector of a fuse according to claim 1, characterized in that: The common contact comprises a first contact and a second contact, the first contact is fixedly connected to the end seal, the first contact and the second contact are conductively and slidably connected and a first elastic member is provided, the elastic force of the first elastic member drives the second contact to conductively abut and cooperate with the split contact of the fuse tube located at the central station.

7. The conductor fuse connector of a fuse according to claim 1, characterized in that: The two end seals are both provided with positioning structures, which are used to position and lock the end seals with the fuse housing.

8. The conductor fuse connector of a fuse according to claim 1, characterized in that: The number of the fuse tubes is 2-6.

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