CN214607178U - Contact net cantilever preassembling workbench - Google Patents

Abstract

The utility model provides a contact net cantilever preassembly workstation relates to the field of contact net spare part equipment, and it includes the support body, and the top of support body is provided with first support piece and the second support piece that is used for supporting flat cantilever, is used for supporting third support piece and the fourth support piece of oblique cantilever. This application has the effect that improves the assembly speed.

Description

Contact net cantilever preassembling workbench

Technical Field

The application relates to the field of contact net spare part equipment, especially relates to a contact net cantilever preassembly workstation.

Background

The flexible contact network is an overhead power supply line and realizes power supply for the locomotive through sliding contact with a pantograph of the electric locomotive. In the actual installation process, a cantilever structure is usually adopted to support and fix the catenary line. The cantilever structure generally comprises a flat cantilever and an inclined cantilever, wherein one ends of the flat cantilever and the inclined cantilever are respectively connected to a contact net support through a rod insulator, and the other ends of the flat cantilever and the inclined cantilever are mutually connected. The pre-preparation of the cantilever structure and the control of the precision of the assembly work are important links of the whole construction process.

In the related technology, the wrist arm pre-assembly method is mainly manually pre-assembled on the ground, and when the bolt is fastened between the inclined wrist arm and the flat wrist arm in the pre-assembly process, the wrench often touches the ground, so that the use is very inconvenient, the pre-assembly working speed is low, and the working efficiency is reduced.

Disclosure of Invention

In order to improve assembly speed, the application provides a contact net cantilever preassembly workstation.

The application provides a contact net cantilever preassembly workstation adopts following technical scheme:

the utility model provides a contact net cantilever preassembly workstation, includes the support body, and the top of support body is provided with first support piece and the second support piece that is used for supporting flat cantilever, is used for supporting third support piece and the fourth support piece of oblique cantilever.

Through adopting above-mentioned technical scheme, place flat cantilever on first support piece and the second support piece, then with oblique cantilever install third support piece and fourth support piece on, flat cantilever and oblique cantilever are by stable support for the relative position of flat cantilever and oblique cantilever is comparatively stable, and when the use tool was connected between flat cantilever and the oblique cantilever, the relative position between flat cantilever and the oblique cantilever is difficult for producing the change, does not need extra repeated adjustment flat cantilever and oblique relative position between parts such as cantilever, has improved assembly speed.

Optionally, the first support member includes a first seat body and a first support seat, the first seat body is connected to the frame body, the first support seat is connected to the top of the first seat body, the upper surface of the first support seat is provided with a first placing groove with a downward concave bottom, the first seat body is in threaded connection with a first bolt, and a first slide rail of the end portion of the first bolt is abutted.

By adopting the technical scheme, the first bolt is unscrewed, the first seat body is moved until the first seat body moves to the preset position, the first bolt is screwed until the first bolt is tightly abutted against the first slide rail, and the position of the first seat body is fixed; in the first standing groove was placed to flat cantilever, first standing groove played stable support to flat cantilever for flat cantilever's position is difficult for removing, has improved the convenience of assembly, is favorable to improving the assembly speed.

Optionally, the top of the first seat body is connected with a first connecting seat, the lower surface of the first supporting seat is fixedly connected with a plurality of vertical connecting rods, the connecting rods penetrate through the first connecting seat and are in vertical sliding connection with the first connecting seat, the connecting rods are in threaded connection with a first nut and a second nut, and the first nut and the second nut are respectively arranged on the upper side and the lower side of the first connecting seat.

Through adopting above-mentioned technical scheme, rotate first nut and second nut for the connecting rod can with the relative vertical slip of first connecting seat, make the height-adjustable of first supporting seat, to the flat cantilever that the model has difference, be convenient for carry out the adjustment of first supporting seat.

Optionally, the second support member includes a second seat, a second support seat, and a limiting rod, the second seat is connected to the frame body, the second support seat is connected to the top of the second seat, the upper surface of the second support seat is provided with a second placing groove with a downward concave bottom, the limiting groove is formed in the upper surface of the second support seat, the wrist arm is provided with a limiting hole, the limiting rod penetrates through the limiting hole and is inserted into the limiting groove, the second support seat is in threaded connection with a second bolt, and the end of the second bolt is abutted to the first slide rail.

By adopting the technical scheme, the second bolt is unscrewed, the second seat body is pushed to move to the preset position on the first slide rail, and then the second bolt is screwed; when the flat cantilever is placed on the first supporting seat, the flat cantilever is placed on the second supporting seat, the limiting hole is opposite to the limiting groove, the limiting rod penetrates through the limiting hole to be inserted into the limiting groove, and the flat cantilever is stably fixed on the first supporting seat and the second supporting seat, so that the position stability of the flat cantilever is guaranteed.

Optionally, the third supporting piece includes a third seat and a third supporting seat, the third seat is connected to the frame body, the third supporting seat is vertically rotatably connected to the top of the third seat, a third placing groove with a downward concave bottom is formed in the upper surface of the third supporting seat, a horizontal third bolt is connected to the third seat through a thread, and the end of the third bolt abuts against the second sliding rail.

By adopting the technical scheme, the third bolt is unscrewed, then the third seat body is moved until the third seat body is moved to a preset position, and the third seat body is screwed down; in the third standing groove can be placed to the cantilever to one side, because the second standing groove plays stable support to the cantilever to one side for the position of the cantilever to one side is difficult for removing, improves the convenience of assembly, is favorable to improving the assembly speed.

Optionally, the fourth supporting piece comprises a fourth seat body and a positioning rod, the fourth seat body is connected to the frame body, the positioning rod is vertical and fixedly connected to the top of the fourth seat body, the positioning rod is close to a supporting plate fixedly connected to the position of the top of the positioning rod, and one end of the inclined wrist arm is fixedly connected with a connecting lug.

Through adopting above-mentioned technical scheme, when placing the cantilever to one side on the third supporting seat for the engaging lug is vertical to be passed the locating lever, and on the engaging lug fell to the backup pad, the backup pad played the supporting role to the engaging lug, and the locating lever played the positioning role to the engaging lug, has improved the stability of cantilever to one side position on the support body, and it is more convenient to assemble, has improved assembly speed.

Optionally, the top of the frame body is provided with a first horizontal slide rail and a second horizontal slide rail, an included angle between the first slide rail and the second slide rail is 0-90 degrees, the first supporting piece and the second supporting piece are slidably connected to the first slide rail, and the third supporting piece and the fourth supporting piece are slidably connected to the second slide rail.

Through adopting above-mentioned technical scheme, first support piece and second support piece are adjustable in the position on first slide rail, and third support piece and fourth support piece are adjustable in the position on the second slide rail to can be applicable to the flat cantilever and the oblique cantilever of different models.

Optionally, a fifth support is arranged on the first slide rail, the fifth support is located on one side, away from the first support, of the second support, the fifth support comprises a fifth base body and two clamping plates, the fifth base body is connected with the first slide rail in a sliding mode along the length direction of the first slide rail, the clamping plates are fixedly connected to the upper surface of the fifth base body in a vertical mode, the two clamping plates are parallel to each other, and one end of the positioning pipe is connected with the connecting hook.

Through adopting above-mentioned technical scheme, place the registration arm on the second supporting seat, make the coupling hook card locate between two cardboards simultaneously, the cardboard carries on spacingly to the coupling hook for the registration arm can not rotate, has improved the stability of registration arm, is convenient for install other connecting pieces on the registration arm.

Optionally, two the equal fixedly connected with reinforcing plate in one side that the cardboard deviates from each other, the upper surface fixed connection of reinforcing plate and fifth pedestal.

Through adopting above-mentioned technical scheme, the reinforcing plate plays the additional strengthening to the cardboard for the cardboard is more stable and non-deformable.

Optionally, the frame body includes a tripod, a fixing rod and a lower tripod, the fixing rod is vertically arranged, the fixing rod is fixedly connected between the upper tripod and the lower tripod, and the first sliding rail and the second sliding rail are respectively and fixedly connected to two edge positions of the upper surface of the upper tripod.

Through adopting above-mentioned technical scheme, support body overall structure is simple and convenient, and the setting of the three horn shapes of support body, make flat cantilever, oblique cantilever be supported on the support body after, the shape of the contact net cantilever of the three horn structures of formation is higher with the uniformity of last tripod shape, when the border position of support body is to flat cantilever, oblique cantilever etc. connect, operating personnel stands in the both sides that the support body set up first slide rail and second slide rail, operating personnel is apart from flat cantilever, the distance between oblique cantilever each department is comparatively unanimous, and the distance is less, operating personnel is comparatively convenient to everywhere installation and connection of contact net cantilever.

Optionally, the middle position of the edge of the upper tripod connecting the first slide rail and the second slide rail is fixedly connected with a storage plate.

Through adopting above-mentioned technical scheme, can place the instrument that is used for installing the sleeve pipe ears on flat cantilever, the oblique cantilever on putting the thing board, for example spanner, pliers etc for when carrying out the installation that the contact net finishes, taking and placing of instrument are comparatively convenient.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the first slide rail, the second slide rail, the first support piece, the second support piece, the third support piece and the fourth support piece, the relative positions of the flat cantilever and the inclined cantilever are relatively stable, the relative positions of the flat cantilever and the inclined cantilever and other parts do not need to be repeatedly adjusted during connection, and the assembly speed is improved;

2. by arranging the second supporting piece and the fourth supporting piece, the flat cantilever and the inclined cantilever are not easy to rotate and move along the self direction, are fixed more stably and are beneficial to further improving the assembly efficiency;

3. through setting up the support body structure, when connecting, operating personnel can be comparatively unanimous apart from the distance between flat cantilever, the each department of oblique cantilever, and the distance is less, and operating personnel is comparatively convenient to the installation everywhere of contact net cantilever and connection.

Drawings

Fig. 1 is a schematic overall structure diagram of the catenary cantilever according to the embodiment;

FIG. 2 is a schematic structural view showing a state where the accessories are mounted on the flat arm and the inclined arm;

FIG. 3 is a schematic structural view of the first and fourth supports;

FIG. 4 is a schematic structural view of a second support member;

FIG. 5 is a schematic structural view of a third support member;

FIG. 6 is a schematic structural view of a fifth support member;

FIG. 7 is a schematic view of the connection of the flat arm, the inclined arm and the support tube;

FIG. 8 is a schematic view of the structure of the positioning tube when the fitting is mounted thereon.

Description of reference numerals: 1. a wrist-flattening arm; 11. the sleeve is double-ear; 12. a first clip; 13. a carrier cable; 14. a limiting hole;

2. an oblique wrist arm; 21. a second clip; 22. a positioning ring; 23. a positioning tube; 231. a connecting hook; 24. connecting lugs; 25. supporting a tube;

3. a frame body; 31. an upper tripod; 311. a storage plate; 312. a first slide rail; 313. a first card slot; 314. a second slide rail; 315. a second card slot; 32. fixing the rod; 33. a lower tripod; 331. placing the plate; 332. placing a hopper;

4. a first support member; 41. a first seat body; 411. a first bolt; 412. a first connecting seat; 413. a connecting rod; 414. a first nut; 415. a second nut; 42. a first support base; 421. a first placing groove;

5; a second support member; 51. a second seat body; 52. a second support seat; 521. a second placing groove; 522. a limiting groove; 523. a second bolt; 53. a limiting rod;

6; a third support member; 61. a third seat body; 611. a third placing groove; 612. a third bolt; 62. a third support seat; 621. a third placing groove;

7. a fourth support member; 71. a fourth seat body; 711. a fourth bolt; 72. positioning a rod; 721. a support plate;

8. a fifth support member; 81. a fifth seat body; 811. a fifth bolt; 82. clamping a plate; 821. a reinforcing plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

Referring to fig. 1, the contact net cantilever includes flat cantilever 1, oblique cantilever 2, a supporting tube 25, flat cantilever 1, the one end of oblique cantilever 2 is used for connecting on the contact net pillar, the other end of flat cantilever 1 is connected with sleeve pipe ears 11, sleeve pipe ears 11 are connected with oblique cantilever 2 simultaneously, make flat cantilever 1, the other one end of oblique cantilever 2 is passed through sleeve pipe ears 11 and is interconnected, be connected with first clip 12 on the flat cantilever 1, be connected with second clip 21 on the oblique cantilever 2, the both ends of supporting tube 25 are connected with first clip 12 and second clip 21 respectively, supporting tube 25 connects between flat cantilever 1 and oblique cantilever 2 promptly, make the cantilever constitute stable triangle-shaped contact net structure.

Referring to fig. 1, a bearing seat cable 13 is connected to a flat cantilever 1, and the bearing seat cable 13 is positioned on one side of a sleeve double-lug 11 far away from a first clamp 12; the inclined wrist arm 2 is connected with a positioning ring 22, the positioning ring 22 is positioned between the sleeve double lug 11 and the second clamp 21, and one side of the inclined wrist arm 2 far away from the support tube 25 is connected with a positioning tube 23 through the positioning ring 22.

The embodiment of the application discloses contact net cantilever preassembly workstation. Referring to fig. 2, the pre-assembly workbench for the contact network cantilever comprises a frame body 3, a first horizontal sliding rail 312 and a second horizontal sliding rail 314 are arranged at the top of the frame body 3, an included angle between the first sliding rail 312 and the second sliding rail 314 is 0-90 °, a first support 4 for supporting the flat cantilever 1 and a second support 5 for supporting and fixing the flat cantilever 1 are arranged on the first sliding rail 312, a third support 6 for supporting the oblique cantilever 2 and a fourth support 7 for supporting and fixing the oblique cantilever 2 are arranged on the second sliding rail 314, the first support 4 is located at the end part of the first sliding rail 312, which is abutted against the second sliding rail 314, and the third support 6 is located at one side of the fourth support 7, which is far away from the first support 4. The flat cantilever 1 is arranged on the first supporting piece 4 and the second supporting piece 5, and the inclined cantilever 2 is arranged on the third supporting piece 6 and the fourth supporting piece 7, so that the relative positions of the flat cantilever 1 and the inclined cantilever 2 are stable, the sleeve ears 11, the first clamp 12, the bearing seat cable 13, the second clamp 21 and the positioning ring 22 are convenient to install, the installation positions of the sleeve ears 11, the first clamp 12, the bearing seat cable 13, the second clamp 21 and the positioning ring 22 are more accurate, the installation positions and the angles of the sleeve ears 11, the first clamp 12, the bearing seat cable 13, the second clamp 21 and the positioning ring 22 do not need to be adjusted for multiple times in the later period, and the assembly speed is improved.

Referring to fig. 2, the rack body 3 includes an upper tripod 31, a fixing rod 32, and a lower tripod 33, the fixing rod 32 is vertically and fixedly connected between the upper tripod 31 and the lower tripod 33, the first slide rail 312 and the second slide rail 314 are respectively and fixedly connected to two edge positions of the upper surface of the upper tripod 31, the middle position of the edge of the upper tripod 31 connected to the first slide rail 312 and the second slide rail 314 is fixedly connected to a placement plate 311, the upper surface of the lower tripod 33 is connected to a placement plate 331, so that tools used for installing the casing double-lug 11, the first clamp 12, and the carrier cable 13 can be placed on the placement plate 311, and the casing double-lug 11, the first clamp 12, the carrier cable 13 and other accessories, the positioning pipe 23, the supporting pipe 25 and the like can be placed on the placement plate 331, so that the taking of each component is convenient during installation. The frame body 3 is provided with the placing bucket 332, the placing bucket 332 is fixedly connected with a hook, the hook is hung on the edge of the upper tripod 31 which is not provided with the first sliding rail 312 and the second sliding rail 314, and tools, accessories and the like can be placed conveniently.

Referring to fig. 2 and 3, the first support member 4 includes a first seat body 41 and a first support seat 42, the first seat body 41 is slidably connected to the first sliding rail 312, a first connection seat 412 is connected to a top of the first seat body 41, the first connection seat 412 is vertically and rotatably connected to the first seat body 41, the first connection seat 412 can also be fixedly connected to the first seat body 41, the first support seat 42 is connected to a top of the first connection seat 412, an upper surface of the first support seat 42 is provided with an arc-shaped first placing groove 421 with a downward recessed bottom, a vertical side surface of the first sliding rail 312 is provided with a first locking groove 313 parallel to a length direction of the first sliding rail 312, the first seat body 41 is threadedly connected with a first bolt 411, an end of the first bolt 411 is opposite to a bottom of the first locking groove 313, a lower surface of the first support seat 42 is fixedly connected with a plurality of vertical connection rods 413, the connection rods 413 pass through the first connection seat 412 and are vertically and slidably connected to the first connection seat 412, the connecting rod 413 is screwed with a first nut 414 and a second nut 415, and the first nut 414 and the second nut 415 are respectively arranged at the upper side and the lower side of the first connecting seat 412. The first support base 42 is height-adjustable by turning the first nut 414 and the second nut 415.

Referring to fig. 4, the second supporting member 5 includes a second seat 51, a second supporting seat 52, and a limiting rod 53, the second seat 51 is slidably connected to the first sliding rail 312 along the length direction of the first sliding rail 312, the second supporting seat 52 is connected to the top of the second seat 51, the second supporting seat 52 is vertically and rotatably connected to the second seat 51, the second supporting seat 52 can also be fixedly connected to the second seat 51, the upper surface of the second supporting seat 52 is provided with a second placing groove 521 with a downward recessed bottom, the upper surface of the second supporting seat 52 is provided with a limiting groove 522, the limiting groove 522 is located at the middle position of the bottom of the second placing groove 521, the wrist-leveling arm 1 is provided with a limiting hole 14, the limiting rod 53 passes through the limiting hole 14 and is inserted into the limiting groove, the second supporting seat 52 is in threaded connection with a second bolt 523, and the end of the second bolt 523 abuts against the first sliding rail 312. The arm 1 is placed in the first and second placement grooves 421 and 521, the limit hole 14 is aligned with the limit groove 522, the limit rod 53 is inserted into the limit groove 522 through the limit hole 14, and the arm 1 is stably fixed.

Referring to fig. 5 and 7, the third supporting member 6 includes a third seat 61 and a third supporting seat 62, the third seat 61 is slidably connected to the second slide rail 314 along the length direction of the second slide rail 314, the third supporting seat 62 is vertically and rotatably connected to the top of the third seat 61, an arc-shaped third placing groove 621611 with a downward-recessed bottom is disposed on the upper surface of the third supporting seat 62, a second locking groove 315 parallel to the length direction of the second slide rail 314 is disposed on the vertical side surface of the second slide rail 314, a horizontal third bolt 612 is threadedly connected to the third seat 61, and the end of the third bolt 612 faces the bottom of the second locking groove 315.

Referring to fig. 3, the fourth supporting member 7 includes a fourth seat 71 and a positioning rod 72, the fourth seat 71 is slidably connected to the second slide rail 314 along a length direction of the second slide rail 314, the fourth seat 71 is threadedly connected with a fourth bolt 711, an end of the fourth bolt 711 faces a bottom of the second slot 315, the positioning rod 72 is vertically and fixedly connected to a top of the fourth seat 71, the positioning rod 72 is close to a position of the top of the positioning rod 72 and fixedly connected with a supporting plate 721, and one end of the wrist arm 2 is fixedly connected with the engaging lug 24. The inclined wrist arm 2 is placed on the third placing groove 621611, the connecting lug 24 is opposite to the positioning rod 72, and the connecting hook 231 vertically moves downwards until the positioning rod 72 is inserted into the connecting lug 24, and the connecting lug 24 abuts against the supporting plate 721, so that the inclined wrist arm 2 is stably fixed.

Referring to fig. 6 and 8, a fifth support 8 for supporting the positioning tube 23 is further disposed on the first slide rail 312, the fifth support 8 is located on a side of the second support 5 away from the first support 4, the fifth support 8 includes a fifth seat 81 and two clamping plates 82, the fifth seat 81 is slidably connected to the first slide rail 312 along a length direction of the first slide rail 312, a fifth bolt 811 is threadedly connected to the fifth seat 81, an end of the fifth bolt 811 abuts against the first slide rail 312, the clamping plates 82 are vertically and fixedly connected to an upper surface of the fifth seat 81, two clamping plates 82 are disposed, and two cardboard 82 are parallel to each other, and cardboard 82 is parallel to the length direction of first slide rail 312, and the one end of registration arm 23 is connected with coupling hook 231, and the equal fixedly connected with reinforcing plate 821 in one side that two cardboard 82 deviate from each other, reinforcing plate 821 perpendicular to cardboard 82 and with the upper surface fixed connection of fifth pedestal 81. During the accessory on the installation registration arm 23, place registration arm 23 on second standing groove 521, locate two cardboard 82 with coupling hook 231 card simultaneously between, cardboard 82 is spacing to coupling hook 231, and registration arm 23 can not rotate around self axis direction, and the installation of registration arm 23 accessory is more accurate and quick.

The implementation principle of the contact network cantilever preassembly workbench in the embodiment of the application is as follows: when the contact net cantilever is installed, firstly, the flat cantilever 1 is placed on the first supporting seat 42 and the second supporting seat 52, the limiting hole 14 is aligned with the limiting groove 522, then the limiting rod 53 penetrates through the limiting hole 14 to be inserted into the limiting groove 522, then the inclined cantilever 2 is placed in the third placing groove 621611, then the connecting lug 24 is opposite to the positioning rod 72, the connecting hook 231 is vertically moved downwards until the positioning rod 72 is inserted into the connecting lug 24, and the connecting lug 24 is abutted to the supporting plate 721, then the sleeve double-lug 11, the first clamp 12 and the bearing seat cable 13 are fixed on the flat cantilever 1, the second clamp 21 and the positioning ring 22 are fixed on the inclined cantilever 2, and at the moment, the flat cantilever 1 and the inclined cantilever 2 are stably fixed, the flat cantilever 1 and the inclined cantilever 2 are not easy to rotate and move along the length direction of the sleeve double-lug 11, the first clamp 12, the inclined cantilever 2, Bearing seat cable 13 can be on flat cantilever 1, second clip 21, holding ring 22 can be on oblique cantilever 2 fixed position more accurate, later with engaging lug 24 rebound until breaking away from locating lever 72, again be connected engaging lug 24 and sleeve pipe ears 11, third supporting seat 62 can follow oblique cantilever 2 and together rotate, thereby keep the stable support to oblique cantilever 2, later connect stay tube 25 between first clip 12 and second clip 21 again, make when connecting stay tube 25, need not adjust the position of first clip 12 and second clip 21 many times repeatedly, make assembly efficiency improve.

Flat cantilever 1, oblique cantilever 2 and stay tube 25 connect up the back, extract gag lever post 53, then with flat cantilever 1, oblique cantilever 2 and stay tube 25 take off from support body 3, later place the registration arm 23 in second standing groove 521, locate between two cardboard 82 with hooke 231 card simultaneously, other accessories can be connected on registration arm 23 this moment, because hooke 231 is spacing by cardboard 82, registration arm 23 can not rotate again, make the installation of accessory more accurate, the accessory installation back that finishes, take off registration arm 23, be connected positioning hook and holding ring 22 again.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a contact net cantilever preassembly workstation which characterized in that: the bracket comprises a bracket body (3), wherein a first supporting piece (4) and a second supporting piece (5) which are used for supporting a flat cantilever (1), a third supporting piece (6) and a fourth supporting piece (7) which are used for supporting an inclined cantilever (2) are arranged at the top of the bracket body (3);

the first support member (4) comprises a first base body (41) and a first support base (42), the first base body (41) is connected to the frame body (3), the first support base (42) is connected to the top of the first base body (41), a first placing groove (421) with the bottom recessed downwards is arranged on the upper surface of the first support base (42), the first base body (41) is in threaded connection with a first bolt (411), and a first sliding rail (312) at the end part of the first bolt (411) is abutted to the first placing groove.

2. The pre-assembly workbench for the cantilever of the overhead line system of claim 1, wherein: the top of the first base body (41) is connected with a first connecting base (412), the lower surface of the first supporting base (42) is fixedly connected with a plurality of vertical connecting rods (413), the connecting rods (413) penetrate through the first connecting base (412) and are in vertical sliding connection with the first connecting base (412), the connecting rods (413) are in threaded connection with a first nut (414) and a second nut (415), and the first nut (414) and the second nut (415) are respectively arranged on the upper side and the lower side of the first connecting base (412).

3. The pre-assembly workbench for the cantilever of the overhead line system of claim 1, wherein: the second support piece (5) comprises a second base body (51), a second support seat (52) and a limiting rod (53), the second base body (51) is connected to the frame body (3), the second support seat (52) is connected to the top of the second base body (51), a second placing groove (521) with the bottom recessed downwards is formed in the upper surface of the second support seat (52), a limiting groove (522) is formed in the upper surface of the second support seat (52), a limiting hole (14) is formed in the wrist arm (1), the limiting rod (53) penetrates through the limiting hole (14) and is inserted into the limiting groove (522), a second bolt (523) is connected to the second support seat (52) in a threaded mode, and the end portion of the second bolt (523) is abutted to the first sliding rail (312).

4. The pre-assembly workbench for the cantilever of the overhead line system of claim 1, wherein: the third supporting piece (6) comprises a third base body (61) and a third supporting seat (62), the third base body (61) is connected to the frame body (3), the third supporting seat (62) is vertically and rotatably connected to the top of the third base body (61), a third placing groove (621) (611) with the bottom recessed downwards is formed in the upper surface of the third supporting seat (62), a horizontal third bolt (612) is connected to the third base body (61) in a threaded mode, and the end portion of the third bolt (612) is abutted to the second sliding rail (314).

5. The pre-assembly workbench for the cantilever of the overhead line system of claim 1, wherein: the fourth supporting piece (7) comprises a fourth seat body (71) and a positioning rod (72), the fourth seat body (71) is connected to the frame body (3), the positioning rod (72) is vertically and fixedly connected to the top of the fourth seat body (71), the positioning rod (72) is close to a supporting plate (721) fixedly connected to the top of the positioning rod, and one end of the inclined wrist arm (2) is fixedly connected with a connecting lug (24).

6. The pre-assembly workbench for the cantilever of the overhead line system of claim 1, wherein: the top of support body (3) is provided with first slide rail (312) of horizontally and second slide rail (314), and the contained angle between first slide rail (312) and second slide rail (314) is 0-90, and first support piece (4) and second support piece (5) sliding connection are in first slide rail (312), and third support piece (6) and fourth support piece (7) sliding connection are in second slide rail (314).

7. The pre-assembly workbench for the cantilever of the overhead line system of claim 6, wherein: be provided with fifth support piece (8) on first slide rail (312), fifth support piece (8) are located one side that first support piece (4) were kept away from in second support piece (5), fifth support piece (8) include fifth pedestal (81) and cardboard (82), fifth pedestal (81) and first slide rail (312) along the length direction sliding connection of first slide rail (312), the vertical fixed connection in upper surface of fifth pedestal (81) of cardboard (82), cardboard (82) set up two, and two cardboard (82) are parallel to each other, the one end of registration arm (23) is connected with coupling hook (231).

8. The pre-assembly workbench for the cantilever of the overhead line system of claim 7, wherein: two cardboard (82) equal fixedly connected with reinforcing plate (821) in the one side that deviates from each other, reinforcing plate (821) and the upper surface fixed connection of fifth pedestal (81).

9. The pre-assembly workbench for the cantilever of the overhead line system of claim 1, wherein: the support body (3) comprises an upper tripod (31), a fixing rod (32) and a lower tripod (33), the fixing rod (32) is vertically arranged, the fixing rod (32) is fixedly connected between the upper tripod (31) and the lower tripod (33), and a first sliding rail (312) and a second sliding rail (314) are respectively and fixedly connected to two edge positions of the upper surface of the upper tripod (31).

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