Transformer wiring device

Abstract

The present invention relates to the technical field of electric tools, and in particular to a transformer wiring device, comprising a wiring device body provided with a fastening mechanism and a wiring mechanism, the fastening mechanism comprising a tensioning bolt, a conical crimping sleeve, and a conical tightening hole provided in the wiring device body, the crimping sleeve is coaxially built into the tightening hole, the conical crimping sleeve is in contact with the conical tightening hole and both have their small diameter ends facing upward, the conical side wall at the bottom of the crimping sleeve is surrounded by at least two elastic crimping sheets, the inner hole of the crimping sleeve is a screw hole, one end of the tensioning bolt is hung outside the wiring device body through a screw head, and the other end is threadedly connected to the upper part of the crimping sleeve, and the lower part of the crimping sleeve is threadedly connected to the transformer wiring stud; the transformer wiring device of the present invention is firmly connected to the transformer wiring stud, is easy to load and unload, and occupies little space for loading and unloading.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to a transformer wiring device. Background Art

[0002] The transformer wiring device is used to fix and conductively connect the external wire to the transformer terminal stud, and generally includes a fastening mechanism for fixing the connection to the transformer terminal stud and a wiring mechanism for fixing the connection wire. The fastening mechanism of the traditional wiring device usually uses a threaded connection method to directly thread the wiring device onto the transformer terminal stud. This method that relies solely on threaded connection is prone to loosening and causes an unreliable connection. In addition, the entire wiring device needs to be rotated during loading and unloading to make it threadedly connected to the terminal stud. Therefore, the external wire must be removed first during loading and unloading. In addition, rotating the entire wiring device also requires a large space. Generally, multiple terminal studs are arranged on the upper surface of the transformer, and the space is relatively narrow. Rotating the entire wiring device requires a large space, so loading and unloading is also extremely inconvenient. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects in the prior art and provide a transformer wiring device which is firmly connected to the transformer wiring studs, is easy to load and unload, and occupies little space for loading and unloading.

[0004] The present invention is achieved through the following technical solutions:

[0005] A transformer wiring device, comprising a metal wiring device body, the wiring device body is provided with a fastening mechanism for fixing and connecting a transformer wiring stud and a wiring mechanism for fixing and connecting an external wire, the fastening mechanism comprising a tensioning bolt, a metal crimping sleeve, and a tightening hole that penetrates the wiring device body, the crimping sleeve is coaxially built into the tightening hole, the tightening hole is divided into an upper accommodating hole and a lower conical tightening hole, the crimping sleeve is divided into an upper connecting tube and a lower conical crimping tube, the conical tightening hole and the conical crimping tube are both arranged with a small diameter end facing upward, and the inner diameter of the small diameter end of the conical tightening hole is smaller than the outer diameter of the large diameter end of the conical crimping tube, the side wall of the conical crimping tube is divided into at least two elastic crimping pieces distributed at intervals along the circumferential direction by at least two axial slits, the axial holes of the connecting tube and the conical crimping tube are respectively provided with internal threads, one end of the tensioning bolt is hung on the top of the wiring device body through a screw head, and the other end extends into the tightening hole and is threadedly connected to the connecting tube, and the axial hole of the conical crimping tube is used for threading the transformer wiring stud.

[0006] Preferably, the taper angle of the inner wall of the tapered tightening hole is the same as the taper angle of the outer wall of the tapered crimping sleeve, so that the inner wall of the tapered tightening hole and the outer wall of the tapered crimping sleeve can fit together.

[0007] Preferably, the crimping sleeve is an integrated conical sleeve, and the crimping sleeve is divided into the connecting sleeve and the conical crimping sleeve from top to bottom, wherein the side wall of the conical crimping sleeve is provided with the slit.

[0008] Preferably, at least two of the elastic crimping sheets are evenly distributed along the circumference of the conical crimping cylinder.

[0009] Preferably, the axial holes of the tapered crimping cylinder and the connecting cylinder are both straight-cylindrical screw holes, and the side wall thickness of the tapered crimping cylinder gradually increases from top to bottom to form a tapered structure.

[0010] Preferably, the diameter of the axial hole of the connecting cylinder is smaller than the diameter of the axial hole of the tapered crimping cylinder, so that a convex step for limiting the stroke of the transformer terminal stud is formed at the intersection of the connecting cylinder and the tapered crimping cylinder.

[0011] Preferably, the wiring mechanism includes a clamping bolt and a wiring hole arranged on the wiring device body for inserting the wire, the side wall of the wiring hole is provided with a screw hole, the clamping bolt is threadedly connected to the screw hole, and one end of the clamping bolt extends into the wiring hole so that the wire can be clamped against the inner wall of the wiring hole.

[0012] Preferably, a wire pressing plate is provided at one end of the clamping bolt extending into the wiring hole, the back of the wire pressing plate is rotatably connected to the end of the clamping bolt, and the front of the wire pressing plate can press the wire against the inner wall of the wiring hole.

[0013] Preferably, the wire pressing plate is a long plate with a concave arc-shaped cross section so as to be able to hold the wire laterally along the axial direction.

[0014] Preferably, an annular groove is provided on the screw head of the clamping bolt, so that the maximum torque that the annular groove can withstand is smaller than the maximum torque that other parts of the clamping bolt can withstand.

[0015] Compared with the prior art, the transformer wiring device of the present invention has the following beneficial effects: ① Through the mutual cooperation of the crimping sleeve, the tightening hole and the tensioning bolt, on the basis of the threaded connection between the crimping sleeve and the transformer wiring stud, the wiring device body is driven to move downward relative to the crimping sleeve by tightening the tensioning bolt, and then the conical crimping sleeve of the crimping sleeve is radially squeezed through the inner side wall of the conical tightening hole, so that the multiple elastic crimping pieces of the conical crimping sleeve are contracted inwardly and circumferentially hold the transformer wiring stud, so that the conical crimping sleeve and the transformer wiring stud are tightly connected. The stud is in a locked state, the connection is firm, and the force is evenly distributed; ② The conical tightening hole and the conical crimping barrel have the same taper angle and fit each other, so that the conductive contact area is large; ③ The crimping sleeve is an integrated structure, the overall structural strength is better, and the number of parts is reduced; ④ The screw holes in the conical crimping barrel and the connecting barrel are both screw holes of equal diameter, and the side wall thickness of the conical crimping barrel gradually increases from top to bottom to form a conical structure. This design can realize the threaded connection between the conical crimping barrel and the transformer terminal stud, and can also realize the conical structure of the conical crimping barrel, and The structural strength of the conical structure is improved; ⑤ The axial hole diameter of the connecting tube is smaller than the axial hole diameter of the conical crimping tube, so that a convex step for limiting the stroke of the transformer terminal stud is formed at the intersection of the connecting tube and the conical crimping tube, which can prevent the crimping sleeve and the transformer terminal stud from extruding too much and damaging the wiring device or the terminal stud; ⑥ The wiring structure adopts a clamping bolt to clamp the external wire, which is securely connected and easy to operate; ⑦ The clamping bolt is provided with a rotatable wire pressing plate, and the wire pressing plate is a concave arc-shaped long plate that can axially hold the wire, which can effectively increase the degree of fixation of the wire; ⑧ By providing an annular groove on the screw head of the clamping bolt, the maximum torque that can be borne at the annular groove is less than the maximum torque that can be borne by other parts of the clamping bolt. Therefore, the maximum torque that can be borne at the annular groove can be designed as the design torque of the clamping bolt. During installation, the clamping bolt is tightened by the screw head on the upper part of the annular groove. When the design torque is reached, the screw head breaks at the annular groove, thereby preventing the clamping bolt from crushing the cable. When disassembling, it can be disassembled by the screw head below the annular groove.

[0016] The concept, specific structure and effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the transformer wiring device of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the transformer wiring device of the present invention;

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the medium crimping sleeve;

[0020] Figure 4 It is one of the reference structural schematic diagrams of the use state of the transformer wiring device of the present invention;

[0021] Figure 5 This is the second reference structural diagram of the transformer wiring device in use state of the present invention;

[0022] Figure 6 yes Figure 5 Schematic diagram of the internal structure.

[0023] Wherein: terminal body 1, fastening mechanism 11, tightening bolt 111, crimping sleeve 112, connecting tube 1121, conical crimping tube 1122, elastic crimping piece 11221, slit 11222, tightening hole 113, accommodating hole 1131, conical tightening hole 1132, through hole 1133, wiring mechanism 12, tightening bolt 121, screw head 1211, annular groove 1212, wiring hole 122, wire pressing plate 123, transformer wiring stud 2. DETAILED DESCRIPTION

[0024] The following is a further description of a transformer connection device of the present invention in conjunction with the accompanying drawings:

[0025] like Figure 1-6As shown, a transformer wiring device includes a metal wiring device body 1, on which a fastening mechanism 11 for fixing and connecting a transformer wiring stud 2 and a wiring mechanism 12 for fixing and connecting an external wire are provided, the fastening mechanism 11 includes a tension bolt 111, a metal crimping sleeve 112, and a tightening hole 113 provided on the wiring device body 1, the crimping sleeve 112 is coaxially built into the tightening hole 113, the tightening hole 113 is divided into an upper accommodating hole 1131 and a lower conical tightening hole 1132, the top center of the accommodating hole 1131 is provided with a through hole Hole 1133, the bottom of the tapered tightening hole 1132 passes through the bottom of the wiring device body 1, the crimping sleeve 112 is an integrated tapered sleeve, and the crimping sleeve 112 is divided into a connecting tube 1121 and a tapered crimping tube 1122 from top to bottom. The inner wall of the tapered tightening hole 1132 and the outer wall of the tapered crimping tube 1122 can fit together and are both arranged with the small diameter end facing upward. The side wall of the tapered crimping tube 1122 is divided into two elastic crimping pieces 11221 symmetrically spaced along the circumferential direction by two axial slits 11222 arranged opposite to each other. The axial hole of the crimping sleeve 112 is provided with an internal thread. The axial hole diameter of the connecting cylinder 1121 is smaller than the axial hole diameter of the tapered crimping cylinder 1122, so that a convex step for limiting the travel of the transformer terminal stud 2 is formed at the intersection of the connecting cylinder 1121 and the tapered crimping cylinder 1122. The side wall thickness of the tapered crimping cylinder 1122 gradually increases from top to bottom to form a tapered structure. One end of the tension bolt 111 is hung outside the wiring device body 1 through the screw head, and the other end extends into the tightening hole 113 through the through hole 1133 and is threadedly connected to the connecting cylinder 1121 of the crimping sleeve 112. The tapered crimping cylinder of the crimping sleeve 112 1122 is threadedly connected to the transformer terminal stud 2. By tightening the tightening bolt 111, the terminal device body 1 can be driven to move downward relative to the crimping sleeve 112. The accommodating hole 1131 can accommodate the crimping sleeve 112, and then the conical crimping barrel 1122 of the crimping sleeve 112 is radially squeezed through the inner side wall of the conical tightening hole 1132, so that the several elastic crimping pieces 11221 of the conical crimping barrel 1122 shrink inwardly and circumferentially embrace the transformer terminal stud 2, so that the conical crimping barrel 1122 and the transformer terminal stud 2 are in a locked state, the connection is firm, and the force is evenly distributed.

[0026] The wiring mechanism 12 includes a clamping bolt 121 and a wiring hole 122 for inserting a wire, which is arranged on the wiring device body 1. The side wall of the wiring hole 122 is provided with a screw hole, and the clamping bolt 121 is threadedly connected to the screw hole. One end of the clamping bolt 121 extends into the wiring hole 122 and is provided with a wire pressing plate 123. The back of the wire pressing plate 123 is rotatably connected to the end of the clamping bolt 121. The front of the wire pressing plate 123 is a long plate structure with a concave arc cross-section, so that it can hold the side of the wire and press the wire against the inner wall of the wiring hole 122 under the drive of the clamping bolt 121; the clamping bolt 121 is a hollow bolt, and a ring groove 1212 is provided on its screw head 1211, so that the maximum torque that can be borne at the ring groove 1212 is smaller than the maximum torque that can be borne by other parts of the clamping bolt 121.

[0027] During installation, it can be installed in an integral manner or in a split manner. During integral installation, the crimping sleeve 112 of the wiring device is first threadedly connected to the transformer terminal stud 2, and then the tensioning bolt 111 is tightened to drive the wiring device body 1 to move downward relative to the crimping sleeve 112, and then the tapered crimping barrel 1122 of the crimping sleeve 112 is radially squeezed through the inner side wall of the tapered tightening hole 1132, so that the plurality of elastic crimping pieces 11221 of the tapered crimping barrel 1122 are contracted inwardly to hold the transformer terminal stud 2 tightly. During the split installation, the conical crimping tube 1122 of the crimping sleeve 112 can be threadedly connected to the transformer terminal stud 2 first, and then the terminal device body 1 can be put on the outside of the crimping sleeve 112 from top to bottom, and the connecting tube 1121 of the crimping sleeve 112 is connected by the tightening bolt 111, and then the tightening bolt 111 is tightened to drive the terminal device body 1 to move downward relative to the crimping sleeve 112, and then the conical crimping tube 1122 of the crimping sleeve 112 is radially squeezed through the inner side wall of the conical tightening hole 1132, so that the several elastic crimping pieces 11221 of the conical crimping tube 1122 are contracted inwardly and hold the transformer terminal stud 2. During the split installation process, whether the terminal mechanism 12 on the terminal device body 1 is fixedly connected to the external wire or not will not affect the operation.

[0028] Compared with the prior art, the transformer wiring device of the present invention has the following beneficial effects: ① Through the mutual cooperation of the crimping sleeve 112, the tightening hole 113 and the tensioning bolt 111, on the basis of the threaded connection between the crimping sleeve 112 and the transformer wiring stud 2, the wiring device body 1 is driven to move downward relative to the crimping sleeve 112 by tightening the tensioning bolt 111, and then the conical crimping barrel 1122 of the crimping sleeve 112 is radially squeezed through the inner side wall of the conical tightening hole 1132, so that the plurality of elastic crimping pieces 11221 of the conical crimping barrel 1122 are contracted inwardly and circumferentially hold the transformer wiring stud 2, The conical crimping barrel 1122 and the transformer terminal stud 2 are locked, the connection is firm, and the force is evenly distributed; ② The conical tightening hole 1132 has the same taper angle as the conical crimping barrel 1122 and fits closely, so that the conductive contact area is large; ③ The crimping sleeve 112 is an integrated structure, the overall structural strength is better, and the number of parts is reduced; ④ The screw holes in the conical crimping barrel 1122 and the connecting barrel 1121 are all screw holes of equal diameter, and the side wall thickness of the conical crimping barrel 1122 gradually increases from top to bottom to form a conical structure. This design can realize the threaded connection between the conical crimping barrel 1122 and the transformer terminal stud 2, and The conical structure of the conical crimping barrel 1122 can be realized, and the structural strength of the conical structure is better; ⑤ The axial hole diameter of the connecting barrel is smaller than the axial hole diameter of the conical crimping barrel, so that a convex step for limiting the stroke of the transformer terminal stud is formed at the intersection of the connecting barrel and the conical crimping barrel, which can prevent the crimping sleeve and the transformer terminal stud from being squeezed too much and damaging the wiring device or the terminal stud; ⑥ The wiring structure adopts a clamping bolt to clamp the external wire, which is reliable and easy to operate; ⑦ The clamping bolt 121 is provided with a rotatable wire pressing plate 123, and the wire pressing plate 123 is a concave arc-shaped long plate that can hold the wire axially The plate can effectively increase the degree of fixation of the wire; by arranging an annular groove 1212 on the screw head 1211 of the clamping bolt 121, the maximum torque that the annular groove 1212 can withstand is smaller than the maximum torque that other parts of the clamping bolt can withstand. Therefore, the maximum torque that the annular groove 1212 can withstand can be designed as the design torque of the clamping bolt. During installation, the clamping bolt is tightened through the screw head on the upper part of the annular groove 1212. When the design torque is reached, the screw head breaks at the annular groove 1212, thereby preventing the clamping bolt from crushing the cable. During disassembly, it can be disassembled through the screw head under the annular groove 1212.

[0029] The present invention introduces some implementation methods and their drawings in detail, but the present invention is not limited to these embodiments and their drawings, and in particular is not limited to the shape of the transformer connection device in the drawings. The drawings show a relatively beautiful transformer connection device in various shapes. Although this shape is not a technical point protected by the present invention, as long as ordinary technicians in this field modify, replace by equivalents, improve, etc. based on the present invention without creative work, other implementation methods and their drawings are all within the protection scope of the present invention.

Claims

1. A transformer wiring device, comprising a metal wiring device body, the wiring device body is provided with a fastening mechanism for fixing and connecting the transformer wiring studs and a wiring mechanism for fixing and connecting the external wires, characterized in that: The fastening mechanism includes a tensioning bolt, a metal crimping sleeve, and a tightening hole that passes through the wiring device body. The crimping sleeve is coaxially built into the tightening hole. The tightening hole is divided into an upper accommodating hole and a lower conical tightening hole. The crimping sleeve is divided into an upper connecting tube and a lower conical crimping tube. The conical tightening hole and the conical crimping tube are both arranged with the small diameter end facing upward, and the inner diameter of the small diameter end of the conical tightening hole is smaller than the outer diameter of the large diameter end of the conical crimping tube. The side wall of the conical crimping tube is divided into at least two elastic crimping pieces distributed at intervals along the circumferential direction by at least two axial slits. The axial holes of the connecting tube and the conical crimping tube are respectively provided with internal threads. One end of the tensioning bolt is hung on the top of the wiring device body through a screw head, and the other end extends into the tightening hole and is threadedly connected to the connecting tube. The axial hole of the conical crimping tube is used for threaded connection to the transformer terminal stud.

2. The transformer connection device according to claim 1, characterized in that: The taper angle of the inner wall of the tapered tightening hole is the same as the taper angle of the outer wall of the tapered crimping sleeve, so that the inner wall of the tapered tightening hole and the outer wall of the tapered crimping sleeve can fit together.

3. The transformer connection device according to claim 1, characterized in that: The crimping sleeve is an integrated conical sleeve, which is divided into the connecting sleeve and the conical crimping sleeve from top to bottom, wherein the side wall of the conical crimping sleeve is provided with the slit.

4. The transformer connection device according to claim 1, characterized in that: At least two of the elastic crimping sheets are evenly distributed along the circumference of the conical crimping cylinder.

5. The transformer connection device according to claim 1, characterized in that: The axial holes of the tapered crimping cylinder and the connecting cylinder are both straight-cylindrical screw holes, and the thickness of the side wall of the tapered crimping cylinder gradually increases from top to bottom to form a tapered structure.

6. The transformer connection device according to claim 1, characterized in that: The diameter of the axial hole of the connecting cylinder is smaller than the diameter of the axial hole of the tapered crimping cylinder, so that a convex step for limiting the stroke of the transformer terminal stud is formed at the intersection of the connecting cylinder and the tapered crimping cylinder.

7. The transformer connection device according to any one of claims 1 to 6, characterized in that: The wiring mechanism includes a clamping bolt and a wiring hole arranged on the wiring device body for inserting the wire. The side wall of the wiring hole is provided with a screw hole. The clamping bolt is threadedly connected to the screw hole. One end of the clamping bolt extends into the wiring hole so that the wire can be clamped on the inner wall of the wiring hole.

8. The transformer connection device according to claim 7, characterized in that: A wire pressing plate is also provided at one end of the clamping bolt extending into the wiring hole. The back of the wire pressing plate is rotatably connected to the end of the clamping bolt, and the front of the wire pressing plate can press the wire against the inner wall of the wiring hole.

9. The transformer connection device according to claim 8, characterized in that: The wire pressing plate is a long plate with a concave arc cross section so as to be able to hold the side surface of the wire axially.

10. The transformer connection device according to claim 7, characterized in that: An annular groove is provided on the screw head of the clamping bolt, so that the maximum torque that the annular groove can withstand is smaller than the maximum torque that other parts of the clamping bolt can withstand.

Images