Transformer wire clamp

Abstract

The utility model discloses a transformer wire clamp which comprises a transformer terminal connecting part and a wire connecting part, the wire connecting part is provided with a wire groove, the wire connecting part is rotationally connected with a plurality of wire pressing blocks through a hinged shaft, each wire pressing block is provided with a first groove and a containing groove, a transition plate and a contact piece are inserted into the containing groove, and the transition plate is provided with a first bending part. The top end of the first bending part abuts against the interior of the first groove, the bottom end of the first bending part is provided with a second groove, the middle of the contact piece is provided with a second bending part, the top end of the second bending part abuts against the interior of the second groove, the bottom end of the second bending part is provided with a third groove, and the wire pressing block, the transition plate and the contact piece are locked on the wire connecting part through a locking piece. The contact piece is in contact with the wire through the third groove of the second bending part, and is suitable for clamping the wire with a smaller outer diameter; after the transition plate and the contact piece are detached, the wire pressing block makes contact with the wire through the first groove, and the wire clamping device is suitable for clamping the wire with the large outer diameter.

Description

Technical Field

[0001] This utility model relates to the field of equipment clamp technology, specifically to a transformer clamp. Background Technology

[0002] In power operations, transformer clamps are used to connect transformer terminals to external conductors. Commercially available transformer clamps generally share a similar basic structure, comprising a transformer terminal connection part and a conductor connection part. The transformer terminal connection part connects to the transformer terminals, and the conductor connection part connects to the external conductors. Chinese utility model patent CN213583434U discloses a transformer clamp that enables the clamping and fixing of transformer terminals of different sizes, increasing the application range of transformer clamps and reducing the installation difficulty for workers. The inventors discovered that in actual operation, not only do transformer terminals vary in size, but external conductors also vary in size. Existing conductor connection parts include a terminal block and a pressure plate, each with a slightly curved groove. These two grooves, with opposite concave directions, accommodate and clamp conductors of different outer diameters. However, when the slightly curved groove cannot meet the actual clamping requirements (i.e., the outer diameter of the conductor is smaller than the diameter of the slightly curved groove), it is necessary to replace it with a different model of transformer clamp, which is time-consuming and labor-intensive, and also requires the production of multiple models of transformer clamps. There is an urgent need for a transformer clamp that can accommodate both large and small outer diameter wires and is easy to use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a transformer clamp that can accommodate both large-diameter and small-diameter wires and is also easy to use.

[0004] To solve the above-mentioned technical problems, this utility model includes a transformer terminal connection part and a wire receiving plate. The wire receiving plate has a wire groove on the side away from the transformer terminal connection part. The cross-section of the wire groove is a downwardly concave arc shape. Its structural features are: the wire receiving plate is detachably connected to a hinge shaft; the wire receiving plate is rotatably connected to several wire pressing blocks via the hinge shaft; each wire pressing block has an upwardly concave first groove in its center; the lower surface of each wire pressing block has a receiving groove; a transition plate and a contact piece located below the transition plate are inserted into the wire pressing block through the receiving groove. The contact piece is bendable and deformable. The transition plate has an upwardly concave first bend in the middle, with the top of the first bend abutting in a first groove. The bottom of the first bend has an upwardly concave second groove. The contact piece has an upwardly concave second bend in the middle, with the top of the second bend abutting in a second groove. The bottom of the second bend has an upwardly concave third groove. The radius of the third groove is smaller than the radius of the second groove, and the radius of the second groove is smaller than the radius of the first groove. The pressure block, transition plate, and contact piece can be locked onto the wire receiving plate by a locking member.

[0005] With the above structure, a detachable hinge shaft allows for easy insertion of the wire clamping block after removal, satisfying the wire clamping position requirements. By incorporating a receiving groove, transition plate, and contact piece, rotating the wire clamping block on the hinge shaft away from the wire groove allows the transition plate and contact piece to be inserted into the receiving groove. The contact piece contacts the wire through the third groove of the second bend. The radius of the third groove is smaller than that of the second groove, which is smaller than that of the first groove, and the maximum vertical distance between the third groove and the wire groove is small, making it suitable for clamping wires with smaller outer diameters. After removing the transition plate and contact piece, the wire clamping block contacts the wire through the first groove. The first groove has a larger radius than the second and third grooves, and the maximum vertical distance between the first groove and the wire groove is larger, making it suitable for clamping wires with larger outer diameters. This achieves the ability to clamp both wires with larger and smaller outer diameters. Operators can bend the transition plate and contact piece to insert one side of them into the receiving groove, preventing interference between the transition plate / contact piece and the wire clamping block, facilitating assembly and disassembly, and making it convenient to use. The locking mechanism is used to lock and unlock the positions of the wire clamping block, transition plate, and contact piece on the conductor receiving plate.

[0006] Furthermore, the second bend has an upwardly extending lifting tongue at its top, which passes upward through the first bend and the pressure block. The pressure block has a first clearance groove for avoiding the lifting tongue, and the first bend has a second clearance groove for avoiding the lifting tongue. The top of the lifting tongue is located above the top of the pressure block. By setting the lifting tongue, the first clearance groove, and the second clearance groove, which are used to avoid the lifting tongue, the pressure block on the hinge shaft is rotated to move it away from the wire groove. After inserting the transition plate and contact piece into the receiving groove, the operator rotates the pressure block so that it is close to the wire groove and can hold the lifting tongue while rotating the pressure block. After the operator holds the lifting tongue, the pressure block, the transition plate, and the contact piece are tightly abutted, preventing the transition plate and contact piece from detaching from the receiving groove.

[0007] Furthermore, a boss is provided at the top of the middle part of the pressure block, and the boss has a third clearance groove for avoiding the lifting tongue. By setting the boss and the third clearance groove, the boss ensures the structural strength of the part of the pressure block near the first clearance groove and ensures the service life of the pressure block.

[0008] Furthermore, the boss is provided with two screw-hole posts, which are located on the left and right sides of the third clearance groove, respectively. Each screw-hole post is screwed with a hand-tightening screw. The lower part of the hand-tightening screw passes downward through the pressure block and the transition plate and abuts against the upper surface of the second bend. By setting the screw-hole posts and hand-tightening screws, after the hand-tightening screw is turned, the lower part of the hand-tightening screw can approach and abut against the second bend of the contact piece. The lower parts of the two hand-tightening screws can apply downward pressure to the left and right sides of the second bend, causing the second bend to undergo slight deformation. This allows the contact piece to reliably contact the wire, ensuring the clamping effect on the wire.

[0009] Furthermore, the conductor receiving plate is provided with a shaft through-mount seat and a shaft mounting seat. The shaft mounting seat is located on the side of the conductor receiving plate closer to the transformer terminal connection part, and the shaft through-mount seat is located on the side of the conductor receiving plate away from the transformer terminal connection part. The hinge shaft includes a connecting section screwed onto the shaft mounting seat, a smooth section passing through the shaft through-mount seat, and a screwing section located on the side of the smooth section away from the connecting section. Several pressure blocks are slidably attached to the smooth section. The outer diameter of the screwing section is larger than the outer diameter of the smooth section, and the outer diameter of the smooth section is larger than the outer diameter of the connecting section. By setting up the shaft through-mount seat, shaft mounting seat, connecting section, smooth section, and screwing section, the operator can manually screw the connecting section onto the shaft mounting seat by turning the screwing section, thereby realizing the detachable connection function of the hinge shaft. The shaft through-mount seat ensures the posture of the hinge shaft carrying several pressure blocks, can stably support the hinge shaft, and ensures the service life of the hinge shaft.

[0010] Furthermore, the smooth section is slidably connected to a spacer sleeve located between two adjacent wire clamping blocks. By setting the spacer sleeve, several wire clamping blocks can be evenly distributed on the hinge shaft, ensuring the clamping effect on the wires.

[0011] Furthermore, the conductor receiving plate is provided with an elongated through hole, and the locking component includes a fastening screw that passes through the pressure block, transition plate, contact piece, and elongated through hole. The fastening screw is screwed with a nut that rests against the bottom end of the conductor receiving plate. By providing the elongated through hole, fastening screw, and nut, the fastening screw is inserted into the pressure block, transition plate, contact piece, and elongated through hole, and the nut is screwed onto the fastening screw. Tightening the nut until it rests against the bottom end of the conductor receiving plate locks the pressure block, transition plate, and contact piece on the conductor receiving plate. Removing the nut unlocks the pressure block, transition plate, and contact piece on the conductor receiving plate, allowing the operator to rotate the pressure block.

[0012] In summary, this utility model has the advantages of being easy to use and having a reasonable structure. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure from the front view of this utility model;

[0015] Figure 3 yes Figure 2 Enlarged view of a portion of area A in the middle;

[0016] Figure 4 This is a top view of the structure of this utility model;

[0017] Figure 5 yes Figure 4 A schematic diagram of the structure viewed in section along line BB;

[0018] Figure 6 This is a top view of the hinge shaft.

[0019] Figure 7 It is a three-dimensional structural diagram of the pressure block and screw hole post;

[0020] Figure 8 yes Figure 7 A structural diagram of the pressure block and screw hole post from another angle;

[0021] Figure 9 This is a three-dimensional structural diagram of the transition plate;

[0022] Figure 10 This is a schematic diagram of the contact piece structure;

[0023] In the diagram: 1. Transformer terminal connection; 2. Wire receiving plate; 21. Wire groove; 22. Long through hole; 3. Hinge shaft; 31. Connecting section; 32. Smooth section; 321. Spacer sleeve; 33. Tightening section; 4. Wire pressing block; 41. First groove; 42. Receiving groove; 43. First clearance groove; 44. Boss; 441. Third clearance groove; 5. Transition plate; 51. First bend; 511. Second groove; 512. Second clearance groove; 6. Contact piece; 61. Second bend; 611. Third groove; 612. Lifting tongue; 7. Screw hole post; 71. Hand screw; 8. Shaft mounting seat; 9. Shaft mounting seat. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Figure 4 The upper side is the front side of this utility model. Figure 4 The lower side is the rear side of this utility model. Figure 4 The left side is the left side of this utility model. Figure 4 The right side is the right side of this utility model. Figure 2 The upper side is the upper side of this utility model. Figure 2 The lower side is the lower side of this utility model.

[0025] Reference Figures 1 to 6This utility model includes a transformer terminal connection part 1 and a wire receiving plate 2. The transformer terminal connection part 1 is located on one side of the wire receiving plate 2. The transformer terminal connection part 1 can be located on the front side of the wire receiving plate 2. A wire groove 21 is provided on the side of the wire receiving plate 2 away from the transformer terminal connection part 1. The cross-section of the wire groove 21 is a downwardly concave arc shape. The wire groove 21 can be located on the rear side of the wire receiving plate 2. The transformer terminal connection part 1 and the wire receiving plate 2 are common components in the field of equipment clamps. Their structural principles are well known to those skilled in the art and will not be described in detail here. The conductor receiving plate 2 is detachably connected to a hinge shaft 3. Several wire pressing blocks 4 are rotatably connected to the conductor receiving plate 2 via the hinge shaft 3. Specifically, the conductor receiving plate 2 has a shaft through-mount seat 8 and a shaft mounting seat 9. The shaft mounting seat 9 is located on the side of the conductor receiving plate 2 closer to the transformer terminal connection part 1, and the shaft through-mount seat 8 is located on the side of the conductor receiving plate 2 away from the transformer terminal connection part 1. The hinge shaft 3 includes a connecting section 31 screwed onto the shaft mounting seat 9, a smooth section 32 passing through the shaft through-mount seat 8, and a screwing section 33 located on the side of the smooth section 32 away from the connecting section 31. Several wire pressing blocks 4 are slidably engaged on the smooth section 32. The outer diameter of the screwing section 33 is larger than the outer diameter of the smooth section 32, and the outer diameter of the smooth section 32 is larger than the outer diameter of the connecting section 31. The smooth section 32 is clearance-fitted to the wire pressing blocks 4. The operator can manually tighten section 33 to screw section 31 onto shaft mounting base 9, thus realizing the detachable connection function of hinge shaft 3. Shaft mounting base 8 ensures the posture of hinge shaft 3, which carries several wire pressing blocks 4, and can stably support hinge shaft 3, ensuring the service life of hinge shaft 3. Smooth section 32 has a spacer sleeve 321 located between two adjacent wire pressing blocks 4. By setting spacer sleeve 321, several wire pressing blocks 4 can be evenly distributed on hinge shaft 3, ensuring the clamping effect on wires.

[0026] Reference Figures 1 to 5 , Figures 7 to 10Each pressure block 4 has a first recessed groove 41 in the middle, with a slightly curved cross-section. A receiving groove 42 is provided on the lower surface of the pressure block 4. A transition plate 5 and a contact piece 6 are inserted into the pressure block 4 through the receiving groove 42, with the right sides of the transition plate 5 and contact piece 6 inserted into the receiving groove 42. The transition plate 5 and contact piece 6 are bendable and can be made of aluminum sheet. The transition plate 5 has a first bent portion 51 in the middle, with its top end abutting in the first groove 41. The bottom end of the first bent portion 51 has a second recessed groove 511, with a slightly curved cross-section. The contact piece 6 has a second bent portion 61 in the middle, with its top end abutting in the second groove 511. The bottom end of the second bent portion 61 has a third recessed groove 611, with a slightly curved cross-section. The radius of the third groove 611 is smaller than that of the second groove 511, and the radius of the second groove 511 is smaller than that of the first groove 41. The transition plate 5 and the contact piece 6 are both roughly flat on the left and right sides and arched upward in the middle. The flat left and right sides of the transition plate 5 and the contact piece 6 can be pressed together by the wire receiving plate 2 and the wire pressing block 4. The top of the second bend 61 is provided with an upwardly extending lifting tongue 612. The lifting tongue 612 passes upward through the first bend 51 and the wire pressing block 4. The wire pressing block 4 is provided with a first clearance groove 43 for avoiding the lifting tongue 612, and the first bend 51 is provided with a second clearance groove 512 for avoiding the lifting tongue 612. The top of the lifting tongue 612 is located above the top of the wire pressing block 4. The first clearance groove 43 and the second clearance groove 512 are used to avoid the lifting tongue 612. The pressure block 4 on the rotating hinge shaft 3 is moved away from the wire groove 21. After the transition plate 5 and contact piece 6 are inserted into the receiving groove 42, the operator rotates the pressure block 4 so that when the pressure block 4 is close to the wire groove 21, he can hold the lifting tongue 612. After the operator holds the lifting tongue 612, the pressure block 4, the transition plate 5 and the contact piece 6 are tightly abutted to prevent the transition plate 5 and the contact piece 6 from falling out of the receiving groove 42.

[0027] Reference Figures 1 to 5 , Figures 7 to 10The top of the middle part of the pressure block 4 is provided with a boss 44, and the boss 44 has a third clearance groove 441 for avoiding the lifting tongue 612. The boss 44 ensures the structural strength of the part of the pressure block 4 near the first clearance groove 43 and ensures the service life of the pressure block 4. The third clearance groove 441 can be vertically connected to the first clearance groove 43. The boss 44 has two screw hole posts 7, which are located on the left and right sides of the third clearance groove 441 respectively. Each screw hole post 7 is screwed with a hand screw 71. The lower part of the hand screw 71 passes downward through the pressure block 4 and the transition plate 5 and can abut against the upper surface of the second bend 61. The hand screw 71 can be a common wing screw. After the hand screws 71 are tightened, the lower part of the hand screws 71 can approach and abut against the second bent portion 61 of the contact piece 6. The lower parts of the two hand screws 71 can apply downward pressure to the left and right sides of the second bent portion 61, causing the second bent portion 61 to undergo slight deformation, so that the contact piece 6 can reliably contact the wire and ensure the clamping effect on the wire. The wire clamping block 4, the transition plate 5 and the contact piece 6 can be locked onto the wire receiving plate 2 by locking components. Specifically, the wire receiving plate 2 is provided with an elongated through hole 22. The locking components include fastening screws that pass through the wire clamping block 4, the transition plate 5, the contact piece 6 and the elongated through hole 22. The fastening screws can be external hexagonal screws, and the fastening screws are screwed with nuts that abut against the bottom end of the wire receiving plate 2. The elongated through-hole 22 extends in the front-to-back direction, as does the axis of the hinge shaft 3. Two elongated through-holes 22 can be spaced apart in the left-to-right direction of the conductor receiving plate 2. Each pressure block 4 can be locked onto the conductor receiving plate 2 by two sets of locking devices. The transition plate 5 and contact piece 6 are provided with holes to avoid the fastening screws in the locking devices. These holes can be elongated holes extending in the left-to-right direction to prevent the fastening screws from interfering with the transition plate 5 and contact piece 6 after bending and deformation. After fastening screws are inserted into the pressure block 4, transition plate 5, contact piece 6, and elongated through-hole 22 and nuts are screwed onto the fastening screws, the nuts are tightened until they abut against the bottom of the conductor receiving plate 2 to lock the pressure block 4, transition plate 5, and contact piece 6 on the conductor receiving plate 2. After removing the nuts, the pressure block 4, transition plate 5, and contact piece 6 on the conductor receiving plate 2 are unlocked, and the operator can rotate the pressure block 4.

[0028] When this utility model is used, by setting a detachable hinge shaft 3, the wire pressing block 4 can be easily inserted into the hinge shaft 3 after the hinge shaft 3 is removed, so as to meet the wire pressing position requirements of the wire. By setting up a receiving groove 42, a transition plate 5, and a contact piece 6, and rotating the wire pressing block 4 on the hinge shaft 3 to move the wire pressing block 4 away from the wire groove 21, the transition plate 5 and the contact piece 6 are inserted into the receiving groove 42. The contact piece 6 contacts the wire through the third groove 611 of the second bend 61. The radius of the third groove 611 is smaller than the radius of the second groove 511, the radius of the second groove 511 is smaller than the radius of the first groove 41, and the maximum vertical distance between the third groove 611 and the wire groove 21 is smaller, which is suitable for clamping wires with smaller outer diameters. After removing the transition plate 5 and the contact piece 6, the wire pressing block 4 contacts the wire through the first groove 41. The radius of the first groove 41 is larger than that of the second groove 511 and the third groove 611, and the maximum vertical distance between the first groove 41 and the wire groove 21 is larger, which is suitable for clamping wires with larger outer diameters, thereby achieving the ability to clamp wires with both larger and smaller outer diameters. Operators can bend the transition plate 5 and contact piece 6 to insert one side of the transition plate 5 and contact piece 6 into the receiving groove 42, preventing interference between the transition plate 5 and contact piece 6 and the wire clamping block 4, facilitating assembly and disassembly, and making it convenient to use. The position of the wire clamping block 4, transition plate 5, and contact piece 6 on the wire receiving plate 2 can be locked and unlocked by operating the locking mechanism.

[0029] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the protection scope of this utility model.

Claims

1. A transformer clamp, comprising a transformer terminal connection portion (1) and a conductor receiving plate (2), wherein the conductor receiving plate (2) has a wire groove (21) on the side away from the transformer terminal connection portion (1), and the cross-section of the wire groove (21) is a downwardly concave arc shape, characterized in that: The wire receiving plate (2) is detachably connected to a hinge shaft (3). The wire receiving plate (2) is rotatably connected to several wire pressing blocks (4) via the hinge shaft (3). Each wire pressing block (4) has an upwardly recessed first groove (41) in the middle. The lower surface of the wire pressing block (4) is provided with a receiving groove (42). The wire pressing block (4) is fitted with a transition plate (5) and a contact piece (6) located below the transition plate (5) through the receiving groove (42). The transition plate (5) and the contact piece (6) can be bent and deformed. The transition plate (5) has an upwardly recessed first bending part (51) in the middle. The top of the first bending part (51) abuts against the first groove. (41) Inside, the bottom end of the first bent part (51) has an upwardly recessed second groove (511), the middle part of the contact piece (6) has an upwardly recessed second bent part (61), the top end of the second bent part (61) abuts in the second groove (511), the bottom end of the second bent part (61) has an upwardly recessed third groove (611), the radius of the third groove (611) is smaller than the radius of the second groove (511), the radius of the second groove (511) is smaller than the radius of the first groove (41), and the wire pressing block (4), the transition plate (5) and the contact piece (6) can be locked on the wire receiving plate (2) by the locking member.

2. The transformer clamp according to claim 1, characterized in that: The second bend (61) has an upwardly extending lifting tongue (612) at its top end. The lifting tongue (612) passes upward through the first bend (51) and the pressure block (4). The pressure block (4) has a first clearance groove (43) for avoiding the lifting tongue (612). The first bend (51) has a second clearance groove (512) for avoiding the lifting tongue (612). The top end of the lifting tongue (612) is located above the top end of the pressure block (4).

3. The transformer clamp according to claim 2, characterized in that: The top of the middle part of the pressure block (4) is provided with a boss (44), and the boss (44) is provided with a third clearance groove (441) for avoiding the lifting tongue (612).

4. The transformer clamp according to claim 3, characterized in that: The boss (44) is provided with two screw posts (7), which are located on the left and right sides of the third relief groove (441). Each screw post (7) is screwed with a hand screw (71). The lower part of the hand screw (71) passes through the pressure block (4) and the transition plate (5) and can abut against the upper surface of the second bend (61).

5. The transformer clamp according to claim 1, characterized in that: The conductor receiving plate (2) is provided with a shaft mounting seat (8) and a shaft mounting seat (9). The shaft mounting seat (9) is located on the side of the conductor receiving plate (2) close to the transformer terminal connection part (1). The shaft mounting seat (8) is located on the side of the conductor receiving plate (2) away from the transformer terminal connection part (1). The hinge shaft (3) includes a connecting section (31) screwed onto the shaft mounting seat (9), a smooth section (32) passing through the shaft mounting seat (8), and a screwing section (33) located on the side of the smooth section (32) away from the connecting section (31). Several wire pressing blocks (4) are slidably attached to the smooth section (32). The outer diameter of the screwing section (33) is larger than the outer diameter of the smooth section (32). The outer diameter of the smooth section (32) is larger than the outer diameter of the connecting section (31).

6. The transformer clamp according to claim 5, characterized in that: The smooth section (32) is slidably connected to a spacer sleeve (321) located between two adjacent pressure blocks (4).

7. The transformer clamp according to any one of claims 1-6, characterized in that: The conductor receiving plate (2) is provided with an elongated through hole (22). The locking component includes a fastening screw that passes through the wire pressing block (4), the transition plate (5), the contact piece (6), and the elongated through hole (22). The fastening screw is screwed with a nut that abuts against the bottom end of the conductor receiving plate (2).

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