CN-121886262-B - Double wire clamping type electric power fitting

CN121886262BCN 121886262 BCN121886262 BCN 121886262BCN-121886262-B

Abstract

The invention relates to a double-wire clamping type electric power fitting, and belongs to the technical field of electric power fittings. The invention comprises a clamping structure I and a clamping structure II, wherein the clamping structure I comprises a connecting seat I, two arc clamping plates I with opposite openings, a connecting seat II, a locking knob, a one-way limiting structure, a spiral locking piece and a pushing rod, the connecting seat I is fixedly arranged in a grounding box, a notch is arranged on the connecting seat I, one ends of the two arc clamping plates I penetrate through the notch and are relatively fixed with the connecting seat I in the axial direction of the notch, the two arc clamping plates I are both arranged on the connecting seat I in a sliding manner along the opening direction, the connecting seat II is arranged in the grounding box and is positioned on one side of the arc clamping plates I, which is opposite to the connecting seat I, a hole II coaxial with the notch is formed in the connecting seat II, and the connecting seat II can slide along the axial direction of the hole II. The invention can ensure that the pressing force is more uniformly distributed along the length direction of the cable, so that the stress of the cable is more uniform, and the cable has an anti-loosening effect.

Inventors

CHEN GUANG
LIU JIANLONG
XU LILI

Assignees

无锡德刚精工机电设备有限公司

Dates

Publication Date: 20260512
Application Date: 20260319

Claims (9)

1. The double-wire clamping type electric power fitting comprises a clamping structure I and a clamping structure II, and is characterized in that the clamping structure I comprises a connecting seat I, a connecting seat II and a connecting seat II, wherein the connecting seat I is used for being fixedly arranged in a grounding box, and a notch is formed in the connecting seat I; one end of the arc clamping plate I with opposite openings is penetrated in the notch and is relatively fixed with the connecting seat I in the axial direction of the notch, and the arc clamping plate I is slidably arranged on the connecting seat I along the opening direction; the second connecting seat is arranged in the grounding box and positioned on one side of the first arc-shaped clamping plate, which is opposite to the first connecting seat, and is provided with a second hole coaxial with the notch, and the second connecting seat can slide along the axial direction of the second hole; the locking device comprises a first connecting seat, a first arc-shaped clamping plate, a locking knob, a one-way limiting structure, a spiral locking piece, a push rod, a transmission assembly and a second connecting seat, wherein the first arc-shaped clamping plate is coaxially and rotatably arranged on the first connecting seat; The clamping structure II comprises two arc clamping plates II with opposite openings, wherein the arc clamping plates II penetrate through the holes II and are fixed relative to the connecting seat II in the axial direction of the holes II, the two arc clamping plates II are installed on the connecting seat II in a sliding mode along the opening direction, one end, back to the connecting seat I, of each arc clamping plate II extends to the outer side of the connecting seat II, the outer wall of each arc clamping plate II is conical, the small-diameter end of each arc clamping plate is back to the connecting seat I, the connecting seat III is fixedly installed in the grounding box and is located on one side, back to the connecting seat I, of each connecting seat II, a hole III coaxial with the holes II is formed in the connecting seat III, the small-diameter end of each arc clamping plate II penetrates through the hole III, the inner diameter of each hole III is smaller than the outer diameter of the large-diameter end of each arc clamping plate II, and when the connecting seat II is pushed by the pushing rod to move towards the connecting seat III, the two arc clamping plates II are pushed by the inner walls of the hole III and are close to each other.
2. The double-wire clamping type electric power fitting according to claim 1, wherein the unidirectional limiting structure comprises a ratchet wheel and a ratchet wheel, the ratchet wheel is annular and sleeved outside the two arc clamping plates, the ratchet wheel and the locking knob are coaxial and relatively fixed, the ratchet wheel is elastically rotated around a rotation axis parallel to the axis of the notch to be connected to the connecting seat one, the ratchet wheel is clamped in a clamping groove on the ratchet wheel, the ratchet wheel can pass over the ratchet wheel during forward rotation, and the ratchet wheel is blocked by the ratchet wheel during reverse rotation.
3. The double-wire clamping type electric power fitting according to claim 2, wherein the transmission assembly comprises a spiral sleeve, a driving gear and a driven gear, the spiral sleeve is rotatably arranged in the grounding box around a rotation axis parallel to the axis of the notch, the push rod is slidably arranged in the grounding box in a guiding manner along the axis direction of the spiral sleeve, the push rod is spirally arranged in the spiral sleeve in a penetrating manner, the driving gear is coaxial with the locking knob and relatively fixed, the driven gear is sleeved outside the spiral sleeve in a rotation-stopping manner, and the driving gear is meshed with the driven gear.
4. A double-wire clamping type electric power fitting according to claim 3, wherein the spiral sleeve is movably arranged in the grounding box along the radial direction, an elastic piece I is arranged between the spiral sleeve and the grounding box, and the driving gear is meshed with the driven gear when the elastic piece I is in a free state.
5. The double-clip fitting according to any one of claims 1 to 4, wherein the screw locking member is detachably connected between the first connector and the locking knob.
6. The double-wire clamping type electric power fitting according to any one of claims 1 to 4, wherein a movable column coaxial with the notch is arranged on the first connecting seat, the movable column is slidably mounted on the first connecting seat along the axis direction, an elastic piece II is arranged between the movable column and the first connecting seat, the elastic piece II applies elastic force towards the second connecting seat, when the elastic piece II is in a free state, the connecting column is arranged in the notch in a penetrating mode, an anti-falling push rod is arranged between the first connecting seat and the second connecting seat, the anti-falling push rod is slidably mounted on the first connecting seat and the second connecting seat along the direction parallel to the axis of the notch, the anti-falling push rod is connected with the movable column, a one-way locking structure is arranged between the anti-falling push rod and the second connecting seat, and the one-way locking structure enables movement of the anti-falling push rod towards the second connecting seat to be blocked.
7. The double-wire clamping type electric power fitting according to claim 6, wherein the unidirectional locking structure comprises a locking block and a plurality of limiting teeth, a through hole is formed in the second connecting seat, the locking block is located in the through hole and is elastically and slidably mounted on the second connecting seat, a limiting inclined surface is formed in one side, facing away from the first connecting seat, of the locking block, the limiting teeth are arranged on the anti-falling rod at intervals along the length direction of the rod of the anti-falling rod, a pushing inclined surface is formed in one side, facing towards the first connecting seat, of the limiting teeth, the anti-falling rod is arranged in the through hole in a penetrating mode, and the pushing inclined surface is attached to the limiting inclined surface.
8. The double-wire clamp type electric power fitting according to any one of claims 1 to 4, wherein a pressing block is connected to one end of the ejector rod facing the second connecting seat, the pressing block has two pressing ends arranged horizontally at intervals, and the two pressing ends are pressed on the second connecting seat.
9. The double-clip fitting according to any one of claims 1 to 4, wherein a ring of anti-slip protrusions is provided on an outer side wall of the locking knob.

Description

Double wire clamping type electric power fitting Technical Field The invention relates to the technical field of electric power fittings, in particular to a double-wire clamping type electric power fitting. Background In modern power systems, particularly in medium-high voltage cable networks, a grounding box is a key device for guaranteeing safe and reliable operation of the system, and plays important roles of grounding, overvoltage protection, cross interconnection and the like of a cable metal sheath or shielding layer, and the reliability of electrical connection inside the grounding box is directly related to the safety of a cable body, the line loss level and the stability of the whole power distribution network. The function of the grounding box is realized, and the grounding box is not only dependent on the grounding box, an electric connection system inside the grounding box plays a crucial role, and the electric connection system is composed of various electric power fittings and is responsible for completing the confluence and connection between a plurality of wires and a grounding bus or a protector terminal. The long-term reliability of the grounding box is thus essentially dependent on whether the connection provided by the hardware inside it is safe, durable, low-resistance. Electric power fitting among the prior art, for example, the patent that the bulletin number of authorizing is CN213602382U discloses an electric power fitting with double-clip line formula, it includes fixing base, second fixed strip, second fixed plate, first nut and recess, placed the fixed block on the fixing base, run through on the fixed block has first bolt, and be fixed with first fixed plate on the fixed block, be fixed with first fixed strip on the first fixed plate, run through on the first fixed strip has the second bolt, run through on the fixing base has the connecting rod, be fixed with the tup on the connecting rod, install the second nut on the second bolt, be fixed with the second fixed plate on the fixing base. This electric power fitting with dual clamp line formula is provided with two sets of fixed strips about, can provide fine fixed action for the fixed plate through the interact between first fixed strip and the second fixed strip, and the effort between the fixed plate can further be increased in the mutual laminating of fixing base 1 at fixed strip middle part and fixed block 2 simultaneously, realizes the dual clamp to the wire. The electric power fitting can improve the clamping force of the cable through double clamping, but due to the fact that the plurality of clamping points are arranged, connecting bolts at the plurality of positions are required to be screwed when the cable is assembled, the operation steps are complex, the assembly efficiency is low, meanwhile, due to the fact that the electric power fitting clamps the cable mainly by means of the connecting bolts, main stress areas on the cable are distributed in discrete points actually, partial areas in the cable are stressed too intensively, the connecting areas of the cable are easy to deform and generate mechanical damage, and fatigue fracture is easy to occur under thermal expansion and cold shrinkage or external force vibration after long-term use. Disclosure of Invention The invention provides a double-wire clamping type electric power fitting, which aims to solve the technical problems that the electric power fitting in the prior art is low in assembly efficiency and is easy to cause mechanical damage of cables in a clamped area. In order to solve the problems, the double-wire clamping type electric power fitting provided by the invention adopts the following technical scheme: the utility model provides a double clamp line formula electric power fitting, includes clamping structure one and clamping structure two, clamping structure one includes: The first connecting seat is fixedly arranged in the grounding box and is provided with a notch; one end of the arc clamping plate I with opposite openings is penetrated in the notch and is relatively fixed with the connecting seat I in the axial direction of the notch, and the arc clamping plate I is slidably arranged on the connecting seat I along the opening direction; the second connecting seat is arranged in the grounding box and positioned on one side of the first arc-shaped clamping plate, which is opposite to the first connecting seat, and is provided with a second hole coaxial with the notch, and the second connecting seat can slide along the axial direction of the second hole; The locking knob is coaxially kept with the notch and rotatably arranged on the first connecting seat, and is rotatably sleeved on the outer sides of the two arc clamping plates; the one-way limiting structure is arranged between the locking knob and the first connecting seat and used for locking the reversed locking knob; The spiral locking piece is sleeved on the outer sides of the first arc clamping