阅读说明：本技术 一种抵抗接线端子板翘曲的电连接结构 (Electric connection structure for resisting warping of wiring terminal board ) 是由 邹德旭 沈龙 洪志湖 赵林杰 代维菊 程建伟 王山 颜冰 黄克捷 杨家辉 于 2021-08-13 设计创作，主要内容包括：本申请涉及一种抵抗接线端子板翘曲的电连接结构,包括：拉杆、接线座、接线端子、传力组件；接线座包括接线底座,拉杆穿过接线底座与其滑动连接；接线端子包括固定设置在拉杆第一端的接线端子板；传力组件套设在拉杆上,且位于接线底座和接线端子板之间。本申请提供的抵抗接线端子板翘曲的电连接结构在使用时,当拉杆受到拉力时,带动接线端子板向接线底座移动,两者通过传力组件相接触,传力组件将接线底座受到的作用力传递到接线端子板第一端,此时,接线端子板第二端受到的翘曲力与接线端子板第一端受到的作用力相互平衡,从而防止接线端子板发生翘曲而损坏,确保了电连接结构的稳定性、可靠性,使其可以长期安全运行。(The application relates to an electric connection structure for resisting warping of a wiring terminal board, comprising: the pull rod, the wire holder, the wiring terminal and the force transmission assembly are arranged on the connecting rod; the wire holder comprises a wire connecting base, and the pull rod penetrates through the wire connecting base to be in sliding connection with the wire connecting base; the connecting terminal comprises a connecting terminal board fixedly arranged at the first end of the pull rod; the force transmission assembly is sleeved on the pull rod and is positioned between the wiring base and the wiring terminal board. The application provides a resist electric connection structure of binding post board warpage when using, when the pull rod received the pulling force, drive terminal board and remove to the terminal board, both contact through biography power subassembly, the effort that biography power subassembly received the terminal board transmits the first end of terminal board, at this moment, the warpage power that the terminal board second end received and the effort that the first end of terminal board received are balanced each other, thereby prevent that terminal board from taking place the warpage and damaging, electric connection structure's stability, reliability have been ensured, make it can long-term safe operation.)

1. An electrical connection structure resistant to warping of a terminal board, comprising: the wire connector comprises a pull rod (1), a wire holder (2), a wiring terminal (3) and a force transmission assembly;

the wiring base (2) comprises a wiring base (21), a wiring base center through hole (24) is formed in a first end (22) of the wiring base (21), and a center circular groove (25) is formed in a second end (23) of the wiring base (21);

the pull rod (1) penetrates through the central through hole (24) of the wiring base and the central circular groove (25) to be connected with the wiring base (2) in a sliding mode;

the connecting terminal (3) comprises a connecting terminal board (31) fixedly arranged at the first end (11) of the pull rod (1);

the force transmission assembly is sleeved on the pull rod (1) and arranged between the wire holder (2) and the wiring terminal (3).

2. The electrical connection structure of claim 1, wherein the force transfer assembly comprises: the movable plate (41) is sleeved on the pull rod (1) and located in the central circular groove (25), a groove is formed in the end face of the movable plate (41), an elastic element is arranged between the central circular groove (25) and the movable plate (41), a limiting plate (44) is arranged at the first end (33) of the terminal board (31), a protruding body is arranged on the limiting plate (44) and faces the groove in a corresponding position, and the movable plate (41) penetrates into or penetrates out of the central circular groove (25) under the action of the elastic element.

3. An electrical connection structure against buckling of a terminal board according to claim 2, wherein said recesses include a plurality of circularly arranged cylindrical recesses (43), and said protrusion includes a long protruding cylinder (45) corresponding to said cylindrical recesses (43).

4. The electrical connection structure against the warpage of the terminal board according to claim 2, wherein the recess includes an annular recess (47), and the convex body includes a convex long circular ring (48) corresponding to the annular recess (47).

5. The electrical connection structure against the warpage of the terminal board as claimed in claim 2, wherein the elastic member includes a plurality of first coil springs (42), and the first coil springs (42) are uniformly distributed in the central circular groove (25) in a ring shape.

6. An electrical connection structure against the buckling of a terminal board according to claim 2, characterized in that said elastic element comprises at least one second helical spring (46), said second helical spring (46) being fitted over said tie rod (1) and being located in said central circular groove (25).

7. The electrical connection structure against buckling of a terminal board according to claim 1, wherein the wire holder (2) further comprises a first retainer ring (26) provided at the second end (23) of the terminal base, the force transmission member passing through the first retainer ring (26).

8. The electrical connection structure against the warpage of the terminal board according to claim 7, wherein the terminal (3) further includes a second stopper ring (32) provided at a first end (33) of the terminal board (31) corresponding to the first stopper ring (26), the second stopper ring (32) having an inner diameter corresponding to an outer diameter of the first stopper ring (26).

Technical Field

The application relates to the technical field of transformer bushing electric contact, in particular to an electric connection structure for resisting warping of a wiring terminal board.

Background

The sleeve is the only channel for connecting the converter transformer and the converter valve in the converter station, bears the full voltage and the full current of the converter transformer for a long time, has complex internal electricity, heat and force coupling characteristics, is used as a key connecting node in the sleeve, is connected with a current-carrying bottom plate at the root of the sleeve and a connecting terminal, realizes the conduction and the transportation of the current of various electrical equipment in the converter station, and has the reliability which is important for the safe operation of the electrical equipment such as the converter transformer.

In recent years, many current-carrying failure accidents of the sleeve electric connection structure occur at home and abroad, and further the sleeve generates abnormal phenomena such as overheating fault, discharging fault and the like, and for a large-capacity converter transformer, the sleeve has the characteristics of large load current, high harmonic component, strong mechanical vibration, high operation temperature and the like, and the load current of the sleeve reaches more than 5000A and is far higher than that of a common power transformer. The sleeve pipe runs under the current-carrying condition of large current, and when the sleeve pipe electric connection structure fails, the high-capacity converter transformer is likely to be ignited and explode.

On one hand, under the action of the tension of a pull rod, a stress area of a terminal board in the sleeve electric connection structure is concentrated at the middle part, and the function of a limiting ring is added, so that the terminal board is easy to warp, the damage of the terminal is caused, the electric connection structure is invalid, and great economic loss is possibly caused; on the other hand, the contact area of the wire holder and the wiring terminal is reduced due to the arrangement of the limiting ring, current conduction is only carried out between the wire holder and the wiring terminal through the limiting ring, and the probability of failure of the electric connection structure is increased. Therefore, it is necessary to deeply study and optimize the structural form of the surface-press-type electrical connection structure and the warpage of the terminal board.

Disclosure of Invention

The application provides a resist binding post board warping electric connection structure to solve the easy warping problem that takes place of terminal board among the traditional face crimping type's the sleeve pipe electric connection structure.

The technical scheme adopted by the application for solving the technical problems is as follows:

an electrical connection structure resistant to warpage of a terminal board, comprising: the pull rod, the wire holder, the wiring terminal and the force transmission assembly are arranged on the connecting rod;

the wiring base comprises a wiring base, a first end of the wiring base is provided with a central through hole of the wiring base, and a second end of the wiring base is provided with a central circular groove;

the pull rod penetrates through the central through hole of the wiring base and the central circular groove to be in sliding connection with the wiring base;

the connecting terminal comprises a terminal board fixedly arranged at the first end of the pull rod;

the force transmission assembly is sleeved on the pull rod and arranged between the wire holder and the wiring terminal.

Further, the force transfer assembly comprises: the movable plate is sleeved on the pull rod and located in the central circular groove, a groove is formed in the end face of the movable plate, an elastic element is arranged between the central circular groove and the movable plate, a limiting plate is arranged at the first end of the terminal board, a protruding body is arranged on the limiting plate, the protruding body is opposite to the groove and corresponds to the groove in position, and the movable plate penetrates into or penetrates out of the central circular groove under the action of the elastic element.

Furthermore, the recess includes a plurality of cylinder recesses that are the annular and distribute, the convex body include with the long cylinder of arch that the cylinder recess corresponds.

Further, the groove comprises an annular groove, and the convex body comprises a convex long circular ring corresponding to the annular groove.

Furthermore, the elastic element comprises a plurality of first spiral springs which are uniformly distributed in the central circular groove in an annular shape.

Furthermore, the elastic element comprises at least one second spiral spring, and the second spiral spring is sleeved on the pull rod and is positioned in the central circular groove.

Furthermore, the wire holder also comprises a first limiting ring arranged at the second end of the wiring base, and the force transmission assembly penetrates through the first limiting ring.

Furthermore, the wiring terminal also comprises a second limiting ring which corresponds to the first limiting ring and is arranged at the first end of the wiring terminal board, and the inner diameter of the second limiting ring is consistent with the outer diameter of the first limiting ring.

The technical scheme provided by the application comprises the following beneficial technical effects:

the application provides a resist electric connection structure of binding post board warpage includes: the pull rod, the wire holder, the wiring terminal and the force transmission assembly are arranged on the connecting rod; the wiring base comprises a wiring base, a first end of the wiring base is provided with a central through hole of the wiring base, and a second end of the wiring base is provided with a central circular groove; the pull rod penetrates through the central through hole and the central circular groove of the wiring base and is connected with the wiring base in a sliding mode; the connecting terminal comprises a terminal board fixedly arranged at the first end of the pull rod; the force transmission assembly is sleeved on the pull rod and arranged between the wiring base and the wiring terminal board. When the electric connection structure resisting the warping of the terminal board is used, when the pull rod is pulled, the terminal board is driven to move towards the terminal base, the pull rod and the force transmission assembly are in contact, the force transmission assembly transmits acting force applied to the terminal base to the first end of the terminal board, and the first end of the terminal board is subjected to a reaction force; the force transmission assembly arranged between the wiring base and the wiring terminal board increases the contact area between the wiring base and the wiring terminal board so as to transmit current, further increases the current bearing capacity of the bushing electric connection structure, and further ensures the operation reliability of the electric connection structure.

Drawings

Fig. 1 is a schematic view of an electrical connection structure resisting warping of a terminal board according to a first embodiment of the present application;

fig. 2 is a schematic structural view of a wire holder and a wire connecting terminal according to a first embodiment of the present disclosure;

fig. 3 is a schematic structural view of a first embodiment of a wiring base and a first coil spring according to the present invention;

FIG. 4 is a schematic cross-sectional view of a first embodiment of a connection base and a first coil spring according to the present disclosure;

fig. 5 is a schematic structural view of a movable plate, a first coil spring and a limiting plate according to a first embodiment of the present disclosure;

fig. 6 is a schematic diagram of a first position-limiting ring, a second position-limiting ring and a terminal board structure according to a first embodiment of the present disclosure;

fig. 7 is a schematic cross-sectional structural view of an operating state of an electrical connection structure resisting warping of a terminal board according to a first embodiment of the present application;

FIG. 8 is a cross-sectional view of a second embodiment of a connection base and a second coil spring according to the present disclosure;

fig. 9 is a schematic structural view of a movable plate, a second coil spring and a limiting plate according to a second embodiment of the present disclosure;

fig. 10 is a schematic cross-sectional structural view of an operating state of an electrical connection structure resisting warping of a terminal board according to a second embodiment of the present application.

Description of reference numerals: 1-a pull rod, 2-a wire holder, 3-a wire terminal, 11-a pull rod first end, 21-a wire holder, 22-a wire holder first end, 23-a wire holder second end, 24-a wire holder central through hole, 25-a central circular groove, 26-a first limiting ring, 31-a wire holder plate, 32-a second limiting ring, 33-a wire holder plate first end, 34-a wire holder plate second end, 41-a movable plate, 42-a first coil spring, 43-a cylindrical groove, 44-a limiting plate, 45-a long protruding cylinder, 46-a second coil spring, 47-an annular groove, and 48-a long protruding ring.

Detailed Description

For the purpose of describing and understanding the technical solutions of the present application, the technical solutions of the present application will be described below with reference to the accompanying drawings provided in the embodiments of the present application.

Referring to fig. 1, a schematic view of an electrical connection structure for resisting warping of a terminal board according to a first embodiment of the present application is provided. As shown in fig. 1, the electrical connection structure includes a wire holder 2, a pull rod 1 penetrating through the wire holder 2, a connection terminal 3 fixedly disposed at a first end 11 of the pull rod 1, and a force transmission assembly.

Specifically, as shown in fig. 1, the terminal block 3 includes a terminal block 31 fixedly disposed at the first end 11 of the tie bar 1, a second stopper ring 32 disposed at a first end 33 of the terminal block 31; referring to fig. 2, fig. 3 and fig. 4 again, fig. 2 is a schematic structural view of a wire holder 2 and a wire connecting terminal 3 according to a first embodiment of the present disclosure, fig. 3 is a schematic structural view of a wire holder 21 and a first coil spring 42 according to a first embodiment of the present disclosure, fig. 4 is a schematic sectional structural view of the wire holder 21 and the first coil spring 42 according to the first embodiment of the present disclosure, as shown in the figure, the wire holder 2 comprises a wiring base 21 and a first limiting ring 26, a wiring base central through hole 24 is formed in a first end 22 of the wiring base 21, a central circular groove 25 is formed in a second end 23 of the wiring base 21, the axes of the wiring base central through hole 24 and the central circular groove 25 are coincident with the axis of the wiring base 21, and the pull rod 1 penetrates through the wiring base central through hole 24 and the central circular groove 25 and can freely move along the wiring base central through hole 24; referring to fig. 5, a schematic structural view of a movable plate 41, a first coil spring 42 and a limiting plate 44 of the first embodiment provided in the present application is shown, as shown in the figure, the force transmission assembly includes a movable plate 41, a plurality of first coil springs 42, a limiting plate 44 and a long protruding cylinder 45, the movable plate 41 is provided with a plurality of annularly distributed cylinder grooves 43, the long protruding cylinder 45 and the cylinder groove 43 are oppositely disposed and are disposed on the limiting plate 44 corresponding to the cylinder grooves 43, the movable plate 41 is disposed in the central circular groove 25, 8 first coil springs 42 are annularly disposed between the movable plate 41 and the central circular groove 25, and the movable plate 41 can penetrate into or out of the central circular groove 25 and the first limiting ring 26 under the action of the first coil springs 42; referring to fig. 6, a schematic structural view of the first position-limiting ring 26, the second position-limiting ring 32 and the terminal board 31 according to the first embodiment of the present disclosure is shown, as shown in the figure, the position of the second position-limiting ring 32 corresponds to the position of the first position-limiting ring 26, the inner diameter of the second position-limiting ring 32 is the same as the outer diameter of the first position-limiting ring 26, and the length of the first position-limiting ring 26 is greater than the length of the second position-limiting ring 32.

Referring to fig. 7, a schematic cross-sectional structural view of an electrical connection structure for resisting warpage of a terminal board according to a first embodiment of the present application is provided. As shown in the drawings, when the first embodiment of the present application provides an electrical connection structure resisting the buckling of the terminal board, in an operating state, the pull rod 1 is under a pulling force to drive the terminal board 31, the limiting board 44 and the long protruding cylinder 45 to move towards the connection base 21, the second end 34 of the terminal board 31 is under an upward buckling force, during the moving process, the long protruding cylinder 45 first contacts with the corresponding cylinder groove 43 arranged on the movable board 41, when the terminal board 31 continues to move towards the connection base 21, under the action of the long protruding cylinder 45, the movable board 41 moves towards the first end 22 of the connection base, the 8 first coil springs 42 annularly distributed in the central circular groove 25 are compressed, the movable board 41 is simultaneously under the spring pressure generated by the first coil springs 42 towards the first end 11 of the pull rod, and the spring pressure is transmitted to the limiting board 44 through the long protruding cylinder 45, the limiting plate 44 transmits the spring pressure to the first end 33 of the terminal board 31 uniformly, and at this time, the two ends of the terminal board 31 receive the buckling force and the spring pressure simultaneously, and the two acting forces have the same magnitude and opposite directions, so that the two ends of the terminal board 31 are stressed in balance, and the terminal board is prevented from being stressed unevenly and further deformed because the second end 34 of the terminal board receives the upward buckling force.

Referring to fig. 8, 9, and 10, fig. 8 is a schematic cross-sectional structural view of a connection base 21 and a second coil spring 46 according to a second embodiment of the present disclosure, fig. 9 is a schematic structural view of a movable plate 41, a second coil spring 46, and a limiting plate 44 according to a second embodiment of the present disclosure, and fig. 10 is a schematic cross-sectional structural view of an electrical connection structure resisting warpage of a connection terminal plate according to the second embodiment of the present disclosure, as shown in the drawings, an electrical connection structure resisting warpage of the connection terminal plate according to the second embodiment of the present disclosure is different from an electrical connection structure resisting warpage of the connection terminal plate according to the first embodiment in that: a second coil spring 46 as an elastic element, an annular groove 47 as a groove provided on the end surface of the movable plate 41, and a long protruding ring 48 provided on the limit plate 44 corresponding to the annular groove 47, wherein the inner diameter of the second coil spring 46 is larger than the diameter of the drawbar 1, the second coil spring is sleeved on the drawbar 1 and is located between the movable plate 41 and the central circular groove 25, and the long protruding ring 48 can be inserted into the annular groove 47.

Referring to fig. 10, a cross-sectional structural view of an electrical connection structure for resisting warpage of a terminal board according to a second embodiment is provided. As shown in the drawings, when the electrical connection structure resisting the warpage of the terminal board according to the second embodiment of the present application enters into an operating state, the same tie rod 1 is subjected to a pulling force to drive the terminal board 31, the retainer plate 44 and the long protruding ring 48 to move towards the connection base 21, during the movement, the long protruding ring 48 first contacts with the annular groove 47, when the terminal board 31 continues to move towards the connection base 21, the movable plate 41 moves towards the first end 22 of the connection base under the action of the long protruding ring 48, the second coil spring 46 disposed in the central circular groove 25 is compressed, the movable plate 41 is simultaneously subjected to a spring pressure generated by the second coil spring 46 towards the first end 11 of the tie rod, and transmits the spring pressure to the retainer plate 44 through the long protruding ring 48, the retainer plate 44 further uniformly transmits the received spring pressure to the first end 33 of the terminal board 31, similarly, the two ends of the terminal board 31 are simultaneously subjected to the same buckling force and the opposite spring pressure, so that the two ends of the terminal board 31 are balanced in stress, and the terminal board 31 is prevented from being deformed due to uneven stress.

According to the electric connection structure resisting the warping of the terminal board, the force transmission assembly comprising the elastic element, the movable plate 41, the limiting plate 44 and the protrusion body is additionally arranged between the wire holder 2 and the terminal 3, when the electric connection structure is used, the spring pressure generated by the elastic element is applied to the first end 33 of the terminal board 31 through the movable plate 41, the limiting plate 44 and the protrusion body, the spring pressure applied to the first end 33 of the terminal board counteracts the upward warping force on the terminal board 31 caused by the tensile force of the pull rod 1, and therefore the terminal board 31 is prevented from being damaged due to uneven stress, and the stability and the safety of the electric connection structure are guaranteed; the contact area between the connection base 21 and the connection terminal board 31 is increased by the arranged movable plate 41, the arranged limiting plate 44, the groove arranged on the movable plate 41 and the bulge arranged on the limiting plate 44, so that larger current can be transmitted between the movable plate and the limiting plate, and the current carrying capacity of the bushing electric connection structure is further increased, so that the current conduction between the connection base 21 and the connection terminal board 31 is no longer only dependent on the mutual contact of the first limiting ring 26 and the second limiting ring 32, the problem that the electric connection structure cannot conduct current due to the damage of the first limiting ring 26 or the second limiting ring 32 is avoided, the reliability of the electric connection structure is further improved, and the failure probability of the electric connection structure is reduced.