CN112713566A

CN112713566A - Electric power fitting capable of self-clamping through dead weight of cable

Info

Publication number: CN112713566A
Application number: CN202011607187.3A
Authority: CN
Inventors: 方亚琴
Original assignee: Changshu Greater Mechanical Product Design Co ltd
Current assignee: Changshu Greater Mechanical Product Design Co ltd; Changshu Guleite Machinery Product Design Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-27
Also published as: CN113746048A

Abstract

The invention belongs to the field of cable fittings, and particularly relates to an electric power fitting self-clamped by the dead weight of a cable, which consists of a plug-in body and an adaptive component, and is characterized in that the plug-in body consists of a plug-in body and plug pins positioned on two sides below the plug-in body, the outer side edges of the lower ends of the two plug pins are respectively provided with a clamping block, the bottoms of the two plug pins are respectively provided with a pressing rod, the plug pins have elasticity, and the clamping blocks are in a right triangle shape; the adapter part is composed of an adapter part main body, two pin containing cavities are formed on two sides of the upper portion of the adapter part main body, a movable cavity is further formed inside the adapter part main body, the upper portion of the movable cavity is communicated with the pin containing cavities and penetrates through the adapter part main body downwards, and a plurality of clamping grooves are formed along the side wall of the outermost end of the pin containing cavities.

Description

Electric power fitting capable of self-clamping through dead weight of cable

Technical Field

The invention belongs to the field of hardware fittings, and particularly relates to an electric power fitting capable of being clamped by self weight of a cable.

Background

The hardware fitting is a device which is necessary to be used for overhead laying of cables or optical cables, and the use amount of the hardware fitting is larger and larger along with the development of national power grids and communication networks.

In the prior art, for example, CN110635311A discloses a side pulling type tubular fitting for a transformer substation, which includes: the bus part is provided with a first plugging piece; a flexible wire portion having: the side wall of the second plug-pull piece is provided with a first plug-pull groove; one end of the third plugging piece is connected with the second plugging piece, a certain distance is reserved between the other end of the third plugging piece and the second plugging piece, a second plugging groove is formed in the side wall of the third plugging piece opposite to the first plugging groove, the second plugging groove is opposite to the first plugging groove, and the first plugging groove and the second plugging groove are combined together and matched with the first plugging piece; the first connecting piece is provided with a threaded end, the threaded end is detachably connected with the second plug-pull piece and the third plug-pull piece through threads, and the joint is located at one end, far away from the second plug-pull piece, of the second plug-pull piece and the third plug-pull piece.

The above prior art has the following disadvantages: the hardware fitting is fastened by adopting threaded connection, so that the construction efficiency is low.

Disclosure of Invention

In order to solve the problems, the invention aims to disclose an electric power fitting which is self-clamped through the dead weight of a cable, and the electric power fitting is realized by adopting the following technical scheme.

The electric power fitting is characterized in that the plug-in body consists of a plug-in body and plug-in pins positioned on two sides below the plug-in body, a first arc-shaped groove is formed in the middle of the lower portion of the plug-in body, clamping blocks are arranged on the outer side edges of the lower ends of the two plug-in pins respectively, a pressing rod is arranged at the bottoms of the two plug-in pins respectively, the plug-in pins have elasticity, the clamping blocks are in the shape of right triangles, one right-angle edge is attached to the outer side wall of the plug-in pin, and the other right-angle edge is perpendicular to the outer side wall of the plug-in pin;

the adapter part comprises an adapter part main body, two sides of the upper part of the adapter part main body form two pin containing cavities, the middle of the upper part of the adapter part main body is inwards recessed to form a second arc-shaped groove, a movable cavity is formed inside the adapter part main body, the upper part of the movable cavity is communicated with the pin containing cavities and penetrates through the adapter part main body downwards, a plurality of clamping grooves are formed in the side walls of the outermost ends of the pin containing cavities along the pin containing cavities, the distance between the side walls of the outermost ends of the two pin containing cavities is greater than the distance between the outer side walls of the two pin containing cavities and smaller than the distance between the outermost ends of the two clamping blocks, the.

The utility model provides an electric power fitting through cable dead weight is from centre gripping, in operation, participate in inserting corresponding participating in of plug-in components body and hold the intracavity, because the triangle-shaped of fixture block and participate in self elasticity, make the cable detained by first arc wall and second arc wall, the fixture block card is gone into in the draw-in groove that corresponds, rotatory supporting screw, it is fixed to make two intervals of participating in between, when the cable need be taken off, only need the counter-rotation supporting screw, make supporting screw participate in with one of them and break away from, push down two depression bars to the centre, break away from the draw-in groove to the fixture block, then extract plug-in components from the adaptation part both can.

The electric power fitting is characterized in that the clamping groove penetrates through the pin accommodating cavity and forms an observation port on the outer wall, and the outermost end of the clamping block does not extend out of the observation port.

The electric power fitting capable of self-clamping through self weight of the cable is characterized in that the lower parts of the two pins form threaded holes respectively, the two threaded holes are identical in shape and located on the same axis, and a supporting screw rod is engaged in the two threaded holes.

The electric power fitting is characterized in that the lower part of participating in of one side forms a screw hole, the lower part of participating in of the other side forms a spacing hole, the screw hole and the spacing hole are located on the same axis, a supporting screw rod is meshed in the screw hole, one end of the supporting screw rod is inserted into the spacing hole, a limiting nut is arranged on one side of the screw hole on the supporting screw rod, two distances of participating in can be enlarged through rotating the supporting screw rod, the clamping block and the clamping groove are clamped more firmly, and meanwhile the supporting screw rod and the supporting screw rod can be more firmly participated in the limiting nut.

The electric power fitting self-clamped through the dead weight of the cable is characterized in that the material of the pressure lever is stainless steel.

The electric power fitting self-clamped through the dead weight of the cable is characterized in that the radiuses of the first arc-shaped groove and the second arc-shaped groove are the same.

The electric power fitting is characterized in that the outer edge of the pulley is provided with the anti-falling part extending towards the middle.

The electric power fitting is characterized in that the inner walls of the first arc-shaped groove and the second arc-shaped groove are also provided with anti-skidding rubber pads.

An electric power fitting capable of self-clamping through dead weight of a cable comprises an insert body and an adaptive component, wherein a rib is further arranged in the middle of the top of the insert body, a hanging ring is arranged at the top of the rib, the electric power fitting is characterized in that the insert body comprises an insert main body and pins positioned on two sides below the insert main body, a first arc-shaped groove is formed in the middle of the lower portion of the insert main body, the insert main body and the pins are hollow, pulleys are respectively arranged on two sides of a cavity in the insert main body, the pulleys can rotate along a pulley shaft, a strand is respectively hung on the pulleys, a clamping block is arranged in the cavity in the pins, the clamping block is in a right triangle shape, an opening is formed on the outer side face of the pin corresponding to the clamping block, the clamping block is connected with the front side wall and the rear side wall of the pins through a clamping block rotating shaft, the clamping block can, a spring is connected between the acute angle of the clamping block connected with the hinge and the bottom plate, a limiting block is arranged on the bottom plate of the pin, the limiting block is in a right triangle shape, and the bevel edge faces outwards; a through hole is formed in the connecting part of the lower part of the rib and the lifting ring and the rib, a movable rod is arranged in the through hole, the lower end of the movable rod is connected with the upper end of the cable, a handle is arranged at the upper end of the movable rod, the length of the movable rod is greater than that of the through hole, when the handle is pulled, the clamping block is rotated through the movable rod and the cable, and when the bottom right-angle edge of the clamping block is contacted with the inclined edge of the limiting block, the inclined edge of the;

the adapter part comprises an adapter part main body, two sides of the upper part of the adapter part main body form two pin containing cavities, the middle of the upper part of the adapter part main body is inwards recessed to form a second arc-shaped groove, a movable cavity is formed inside the adapter part main body, the upper part of the movable cavity is communicated with the pin containing cavities and penetrates through the adapter part main body downwards, a plurality of clamping grooves are formed in the side wall of the outermost end of each pin containing cavity along the side wall of the outermost end of the pin containing cavity, the distance between the side walls of the outermost ends of the two pin containing cavities is greater than the distance between the outer side walls of the two pin containing cavities when the inclined edges of the two clamping blocks are horizontal, the upper sides.

Above-mentioned an electric power fitting through cable dead weight self-gripping, during operation, participate in inserting corresponding participating in of plug-in components body and hold the intracavity, make the cable detained by first arc wall and second arc wall, tensile strand, the fixture block passes through strand and spring rotation, stretch out and participate in the opening of lateral surface, and the card goes into corresponding draw-in groove, rotatory supporting screw, it is fixed to make two intervals of participating in between, when the cable need be taken off, only need the counter-rotation supporting screw, make supporting screw and one of them participate in and break away from, push down two depression bars to the centre, break away from the draw-in groove to the fixture block, the fixture block is in plug-in components main part inner cavity under the pulling force effect of spring, then with plug-in components from the adaptation part extract both can, need not always to press two depression bars.

The electric power fitting is characterized in that the lower part of inserting the pin on one side forms a threaded hole, the lower part of inserting the pin on the other side forms a limit hole, the threaded hole and the limit hole are positioned on the same axis, a supporting screw rod is engaged in the threaded hole, one end of the supporting screw rod is inserted into the limit hole, a limit nut is arranged on one side of the supporting screw rod, the electric power fitting is clamped by the self-weight of the cable, two distances of inserting the pin can be enlarged by rotating the supporting screw rod, a clamping block and a clamping groove are clamped more firmly, and meanwhile the supporting screw rod and the pin can be clamped more firmly by the limit nut.

The self-locking device can self-lock through the dead weight of the cable, further strengthen the locking degree of the hardware fitting to the cable, observe the position of the clamping block through the observation port, prevent the clamping block from penetrating out of the observation port, and prevent the clamping block from hurting the hands of constructors during construction; the cable is regulated in a buckling mode, so that the method is quick and convenient, and the construction efficiency is improved.

Therefore, the invention has the advantages of simple structure, convenient use, safety, high construction efficiency, firm locking and the like.

Drawings

Fig. 1 is a schematic perspective view of the assembled structure of the present invention.

Fig. 2 is a schematic perspective view of an interposer in embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of an adapter component in embodiment 1 of the present invention.

Fig. 4 is a cross-sectional view of an adapter part according to embodiment 1 of the present invention.

Fig. 5 is a schematic perspective view of an internal structure of an interposer in embodiment 2 of the present invention.

Fig. 6 is a partially enlarged view of the area a in fig. 5.

Fig. 7 is a cross-sectional view of a suspension ring member according to embodiment 2 of the present invention.

In the figure: 1. the novel plug-in device comprises a hanging ring, 2 ribs, 3 plug-in bodies, 31 plug-in main bodies, 32 first arc-shaped grooves, 33 plug pins, 34 compression rods, 35 pulleys, 36 hinge ropes, 37 fixture blocks, 371 fixture block rotating shafts, 38 limiting blocks, 39 bottom plates, 310 springs, 4 supporting parts, 5 adapting parts, 51 adapting part main bodies, 52 plug pin accommodating cavities, 53 second arc-shaped grooves, 54 observation ports, 55 clamping grooves, 56 movable cavities, 6 handles, 7 movable rods and 8 cables.

Detailed Description

Example 1

Referring to fig. 1, 2, 3 and 4, an electric power fitting self-clamped by the dead weight of a cable comprises a plug-in body 3 and an adapting part 5, wherein a rib 2 is further arranged in the middle of the top of the plug-in body 3, and a hanging ring 1 is arranged on the top of the rib 2, and is characterized in that the plug-in body 3 comprises a plug-in body 31 and pins 33 positioned on two sides below the plug-in body 31, a first arc-shaped groove 32 is formed in the middle of the lower portion of the plug-in body 31, a clamping block 37 is respectively arranged on the outer side edges of the lower ends of the two pins 33, a pressing rod 34 is respectively arranged at the bottom of the two pins 33, a threaded hole is respectively formed on the lower portion of the two pins 33, the two threaded holes are identical in shape and are positioned on the same axis, a supporting screw rod 4 is engaged in the two threaded holes, the pins 33 have elasticity, the clamping block, the other right-angle side is perpendicular to the outer side wall of the pin 33;

the adapter part 5 is composed of an adapter part main body 51, two pin receiving cavities 52 are formed on two sides of the upper portion of the adapter part main body 51, the middle of the two pin receiving cavities is recessed inwards to form a second arc-shaped groove 53, a movable cavity 56 is further formed inside the adapter part main body 51, the upper portion of the movable cavity 56 is communicated with the pin receiving cavities 52 and penetrates through the adapter part main body 51 downwards, a plurality of clamping grooves 55 are formed along the side wall of the outermost end of the pin receiving cavities 52, the clamping grooves 55 penetrate through the pin receiving cavities 52 and form an observation port 54 on the outer wall, the distance between the side walls of the outermost ends of the two pin receiving cavities 52 is larger than the distance between the outer sides of the two pins 33 and smaller than the distance between the outermost ends of the two clamping blocks 37, the upper edge of the clamping block 37 is attached to the clamping grooves 55, the outermost.

When the plug-in connector works, the plug-in pins 33 of the plug-in connector body 3 are inserted into the corresponding plug-in pin accommodating cavities 52, the cable 8 is buckled by the first arc-shaped groove 32 and the second arc-shaped groove 53 due to the triangular shape of the fixture blocks 37 and the elasticity of the plug-in pins 33, the fixture blocks 37 are clamped into the corresponding clamping grooves 55, the support screw rods 4 are rotated to fix the distance between the two plug-in pins 33, when the cable 8 needs to be taken down, the support screw rods 4 only need to be rotated reversely to separate the support screw rods 4 from one of the plug-in pins 33, the two pressure rods 34 are pressed towards the middle until the fixture blocks 37 are separated from the clamping grooves 55, and then the plug-in connector body 3 is pulled out.

Example 2

An electric power fitting capable of self-clamping through self weight of a cable comprises a plug-in body 3 and an adaptive component 5, wherein the middle of the top of the plug-in body 3 is also provided with a rib 2, the top of the rib 2 is provided with a hanging ring 1, and the electric power fitting is characterized in that the plug-in body 3 comprises a plug-in main body 31 and plug pins 33 positioned on two sides below the plug-in main body 31, the middle below the plug-in main body 31 is provided with a first arc-shaped groove 32, the outer sides of the lower ends of the two plug pins 33 are respectively provided with a clamping block 37, the bottoms of the two plug pins 33 are respectively provided with a pressure lever 34, the lower part of the plug pin 33 on one side is provided with a threaded hole, the lower part of the plug pin 33 on the other side is provided with a limiting hole, the threaded hole and the limiting hole are positioned on the same axis, a supporting screw rod, the plug pin 33 is elastic, the fixture block 37 is in a right-angled triangle shape, one right-angled side is attached to the outer side wall of the plug pin 33, and the other right-angled side is perpendicular to the outer side wall of the plug pin 33;

Compared with embodiment 1, the distance between the two pins 33 can be increased by rotating the support screw 4, so that the clamping block 37 and the clamping groove 55 are clamped more firmly, and meanwhile, the limit nut can enable the support screw 4 and the pins 33 to be firmer.

Example 3

Referring to fig. 5, 6 and 7, the electric power fitting self-clamped by the dead weight of a cable comprises a plug-in body 3 and an adapting part 5, wherein a rib 2 is further arranged in the middle of the top of the plug-in body 3, and a hanging ring 1 is arranged on the top of the rib 2, and is characterized in that the plug-in body 3 comprises a plug-in body 31 and pins 33 positioned on two sides below the plug-in body 31, a first arc-shaped groove 32 is formed in the middle below the plug-in body 31, the plug-in body 31 and the pins 33 are hollow, a pulley 35 is respectively arranged on two sides of a cavity inside the plug-in body 31, the pulley 35 can rotate along a pulley shaft, a twisted cable 36 is respectively hung on each pulley 35, a clamping block 37 is arranged in the cavity inside the plug 33, the clamping block 37 is in a right triangle shape, an opening is formed on the outer side surface of the pin 33 corresponding to the clamping block 37, and the clamping block 37 is connected with the front and, the fixture block 37 can rotate along the rotating shaft 371, the lower end of the cable 36 is connected with an acute angle of the fixture block 37 close to the middle part of the plug-in unit main body 31, a spring 310 is connected between the acute angle of the fixture block 37 connected with the cable 36 and the bottom plate 39, the bottom plate 39 of the pin 33 is provided with a limiting block 38, the limiting block 38 is in a right triangle shape, the inclined edge faces to the outside, the bottoms of the two pins 33 are respectively provided with a pressing rod 34, the lower parts of the two pins 33 are respectively provided with a threaded hole, the two threaded holes are the same in shape and are positioned on the same axis, and a; a through hole is formed in the connecting part of the rib 2, the lower part of the hanging ring 1 and the rib 2, a movable rod 7 is arranged in the through hole, the lower end of the movable rod 7 is connected with the upper end of a hinge 36, a handle 6 is arranged at the upper end of the movable rod 7, the length of the movable rod 7 is greater than that of the through hole, when the handle 6 is pulled, the fixture block 37 is rotated through the movable rod 7 and the hinge 36, and when the bottom right-angle edge of the fixture block 37 is contacted with the inclined edge of the limiting block 38, the inclined edge of the;

the adapting part 5 is composed of an adapting part main body 51, two pin containing cavities 52 are formed at two sides of the upper part of the adapting part main body 51, the middle part is inwards sunken to form a second arc-shaped groove 53, a movable cavity 56 is further formed inside the adapting part main body 51, the upper part of the movable cavity 56 is communicated with the pin containing cavities 52, and downwardly through the adapter body 51, a plurality of catching grooves 55 formed along the outermost side walls of the prong receiving cavities 52, the catching grooves 55 penetrating the prong receiving cavities 52 and forming viewing ports 54 at the outer walls, the distance of the outermost side walls of the two pin receiving chambers 52 is greater than the distance of the outer side walls of the two pins 33, and is smaller than the distance between the outermost ends of the two blocks 37 when the inclined edges of the two blocks 37 are horizontal, the upper edge of the fixture block 37 is attached to the clamping groove 55, the outermost end of the fixture block 37 does not extend out of the observation port 54, and the sum of the lengths of the pin 33 and the pressing rod 34 is greater than the length of the adapting part 5.

When the plug-in connector works, the plug pins 33 of the plug-in connector body 3 are inserted into the corresponding plug pin accommodating cavities 52, the cable 8 is buckled by the first arc-shaped groove 32 and the second arc-shaped groove 53, the cable 36 is stretched, the fixture block 37 rotates through the cable 36 and the spring 310, extends out of the opening on the outer side surface of the plug pin 33 and is clamped into the corresponding clamp groove 55, the support screw 4 is rotated to fix the distance between the two plug pins 33, when the cable 8 needs to be taken down, the support screw 4 only needs to be rotated reversely, the support screw 4 is separated from one plug pin 33, the two pressure rods 34 are pressed towards the middle until the fixture block 37 is separated from the clamp groove 55, the fixture block 37 is retracted into the inner cavity of the plug-in connector body 31 under the pulling force of the spring 310, and then the plug-in connector body 3 is pulled out of the adapting component 5 without directly pressing the two.

The electric power fitting self-clamped by the dead weight of the cable according to any embodiment is characterized in that the material of the pressure lever 34 is stainless steel.

The electric power fitting self-clamped by the self weight of the cable according to any embodiment is characterized in that the radius of the first arc-shaped groove 32 is the same as that of the second arc-shaped groove 53.

The electric power fitting self-clamped by the self weight of the cable according to any embodiment is characterized in that the outer edge of the pulley 35 is provided with an anti-falling part extending towards the middle.

The electric power fitting self-clamped through dead weight of the cable in any embodiment is characterized in that anti-skidding rubber pads are further arranged on the inner walls of the first arc-shaped groove 32 and the second arc-shaped groove 53.

The self-locking device can self-lock through the dead weight of the cable, further strengthen the locking degree of the hardware fitting to the cable, observe the position of the fixture block 37 through the observation port 54, prevent the fixture block 37 from penetrating out of the observation port 54, and prevent hands of constructors from being injured by the fixture block 37 during construction; the cable is regulated in a buckling mode, so that the method is quick and convenient, and the construction efficiency is improved.

The invention solves the problems that the hardware fitting is fastened by adopting threaded connection and the construction efficiency is low in the prior art.

The above-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be construed as limiting the present invention. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. The electric power fitting capable of being automatically clamped through the dead weight of a cable comprises an insert body (3) and an adaptive part (5), wherein a rib (2) is further arranged in the middle of the top of the insert body (3), a hanging ring (1) is arranged at the top of the rib (2), and the electric power fitting is characterized in that the insert body (3) comprises an insert main body (31) and plug pins (33) positioned on two sides below the insert main body (31), a first arc-shaped groove (32) is formed in the middle of the lower portion of the insert main body (31), a clamping block (37) is arranged on each of the outer side edges of the lower ends of the two plug pins (33), a pressing rod (34) is arranged at the bottom of each of the two plug pins (33), the plug pins (33) have elasticity, the clamping block (37) is in the shape of a right triangle, one right-angle side is attached to the outer side wall of the;

the adapter part (5) is composed of an adapter part main body (51), two pin containing cavities (52) are formed on two sides of the upper portion of the adapter part main body (51), the middle of the adapter part main body is inwards recessed to form a second arc-shaped groove (53), a movable cavity (56) is further formed inside the adapter part main body (51), the upper portion of the movable cavity (56) is communicated with the pin containing cavities (52) and penetrates through the adapter part main body (51) downwards, a plurality of clamping grooves (55) are formed along the side walls of the outermost ends of the pin containing cavities (52), the distance between the side walls of the outermost ends of the two pin containing cavities (52) is larger than that between the outer side walls of the two pins (33) and smaller than that between the outermost ends of the two clamping blocks (37), the upper edges of the clamping blocks (37) are attached to the clamping grooves (55), and the sum of the lengths of.

2. The electric power fitting self-clamped by the self weight of the cable according to claim 1, wherein the clamping groove (55) penetrates through the pin receiving cavity (52) and forms a viewing port (54) in the outer wall, and the outermost end of the clamping block (37) does not protrude out of the viewing port (54).

3. An electric power fitting self-clamped by the self weight of a cable according to claim 1 or claim 2, wherein the lower parts of the two pins (33) are respectively formed with a threaded hole, the two threaded holes are identical in shape and located on the same axis, and a support screw (4) is engaged in the two threaded holes.

4. The socket according to claim 1 or 2, wherein the lower part of the pin (33) on one side is formed with a threaded hole, the lower part of the pin (33) on the other side is formed with a limiting hole, the threaded hole and the limiting hole are positioned on the same axis, a supporting screw rod (4) is engaged in the threaded hole, one end of the supporting screw rod (4) is inserted into the limiting hole, and a limiting nut is arranged on the supporting screw rod (4) on one side of the threaded hole.

5. The electric power fitting self-clamped by the self weight of the cable as claimed in claim 5, wherein the outer edge of the pulley (35) is provided with a retaining member extending towards the middle.

6. The utility model provides an electric power fitting through cable dead weight self-holding, comprises plug-in components body (3) and adapter part (5), still be equipped with a muscle (2) in the middle of the top of plug-in components body (3), muscle (2) top is equipped with a rings (1), its characterized in that the plug-in components body (3) comprises plug-in components main part (31) and participate in (33) that are located plug-in components main part (31) below both sides, plug-in components main part (31) below middle part forms a first arc wall (32), plug-in components main part (31) and participate in (33) inside are hollow, and plug-in components main part (31) inside cavity both sides respectively are equipped with a pulley (35), and pulley (35) can rotate along the pulley shaft, respectively hang a strand (36) on pulley (35), be equipped with a fixture block (37) in participating in (33) inside cavity, fixture block (37) are right angled triangle, an opening is formed in the outer side face of the plug-in pin (33) corresponding to the clamping block (37), the clamping block (37) is connected with the front side wall and the rear side wall of the plug-in pin (33) through a clamping block rotating shaft (371), the clamping block (37) can rotate along the rotating shaft (371), the lower end of the hinge (36) is connected with an acute angle of the clamping block (37) close to the middle of the plug-in main body (31), a spring (310) is connected between the acute angle of the clamping block (37) connected with the hinge (36) and a bottom plate (39), a limiting block (38) is arranged on the bottom plate (39) of the plug-in pin (33), the limiting block (38; a through hole is formed in the connecting part of the lower part of the rib (2) and the lifting ring (1) and the rib (2), a movable rod (7) is arranged in the through hole, the lower end of the movable rod (7) is connected with the upper end of a cable (36), a handle (6) is arranged at the upper end of the movable rod (7), the length of the movable rod (7) is greater than that of the through hole, when the handle (6) is pulled, the clamping block (37) is rotated through the movable rod (7) and the cable (36), and when the bottom right-angle edge of the clamping block (37) is contacted with the bevel edge of the limiting block (38), the bevel edge of the clamping block (37) is in;

the adapter part (5) is composed of an adapter part main body (51), two plug pin containing cavities (52) are formed on two sides of the upper part of the adapter part main body (51), the middle part of the adapter part main body is inwards sunken to form a second arc-shaped groove (53), a movable cavity (56) is further formed inside the adapter part main body (51), the upper part of the movable cavity (56) is communicated with the plug pin containing cavities (52), and downwardly penetrates through the adapter body (51), a plurality of clamping grooves (55) are formed along the outer side wall of the pin accommodating cavity (52), the distance between the outermost side walls of the two pin receiving chambers (52) is larger than the distance between the outer side walls of the two pins (33), and is smaller than the distance between the outermost ends of the two blocks (37) when the bevel edges of the two blocks (37) are horizontal, the upper edge of the clamping block (37) is attached to the clamping groove (55), and the sum of the lengths of the plug pin (33) and the pressing rod (34) is greater than the length of the adapting part (5).

7. An electric power fitting self-clamping by cable weight according to claim 6, characterized in that the locking groove (55) penetrates through the pin receiving cavity (52) and forms a viewing opening (54) in the outer wall, and the outermost end of the locking block (37) does not protrude out of the viewing opening (54).

8. An electric power fitting self-clamped by the self weight of a cable according to claim 6 or claim 7, wherein the lower parts of the two pins (33) are respectively formed with a threaded hole, the two threaded holes are identical in shape and located on the same axis, and a support screw (4) is engaged in the two threaded holes.

9. The electric power fitting self-clamped by the self weight of the cable according to claim 6 or claim 7, wherein the lower portion of the pin (33) on one side is formed with a threaded hole, the lower portion of the pin (33) on the other side is formed with a limiting hole, the threaded hole and the limiting hole are located on the same axis, a supporting screw (4) is engaged in the threaded hole, one end of the supporting screw (4) is inserted into the limiting hole, and a limiting nut is arranged on one side of the threaded hole on the supporting screw (4).

10. The electric power fitting self-clamped by the self weight of the cable as claimed in claim 9, wherein the outer edge of the pulley (35) is provided with a retaining member extending towards the middle.