CN107899856A - One kind is used for crane span structure production equipment - Google Patents

Abstract

The invention discloses one kind to be used for crane span structure production equipment, including the supplier of the solid shell of dress and locking that are fitted on the right side of vehicle frame in the solid shell of the dress that rises and falls, the chamber that rises and falls is provided with the vehicle frame its right end face, cooperation is slid in the chamber that rises and falls undercarriage is installed, spiral coordinates the spiral column for being provided with that stretching, extension is set up and down in the undercarriage, the spiral column bottom stretching, extension afterbody is rotatably assorted with the bottom of chamber end wall that rises and falls to be connected, afterbody is stretched with driving mechanomotive force to be connected in the spiral column top, it is described to drive machine outer surface to be fixedly installed in described rise and fall in chamber top end wall, the undercarriage its right end face is fixedly connected with the solid shell left end face of the dress, the solid groove of dress is equipped with the solid shell its right end face of dress；The configuration of the present invention is simple, can realize that japanning cylinder heads into the adjusting work of stretching automatically and automatic locking and the unlock work of locking device, easy disassembly are safeguarded.

Description

One kind is used for crane span structure production equipment

Technical field

The present invention relates to crane span structure production technical field, is specifically that one kind is used for crane span structure production equipment.

Background technology

Crane span structure is the important equipment of erecting cable during power construction, it is necessary to crane span structure after crane span structure production shaping Outer surface carry out japanning work, the brushing of traditional crane span structure is usually completed by manual hand manipulation, is produced in artificial painting process Dust health is impacted, artificial painting efficiency is low, in addition, existing automatically answer crane span structure brushing apparatus structure It is miscellaneous, it is not easy to dismantle, moves, carries.

The content of the invention

The technical problems to be solved by the invention are to provide one kind and are used for crane span structure production equipment, it can solve above-mentioned present The problem of in technology.

The present invention is achieved through the following technical solutions：One kind of the present invention is used for crane span structure production equipment, including rises Fall the supplier of the solid shell of the dress being fitted on the right side of vehicle frame and locking in the solid shell of the dress, the vehicle frame is right The chamber that rises and falls is provided with side end face, cooperation is slid in the chamber that rises and falls undercarriage is installed, spiral coordinates peace in the undercarriage The spiral column set equipped with upper and lower stretching, extension, the spiral column bottom stretching, extension afterbody and the bottom of chamber end wall that rises and falls are rotatably assorted company Connect, afterbody is stretched with driving mechanomotive force to be connected in the spiral column top, described to drive described in machine outer surface is fixedly installed in Rise and fall in chamber top end wall, the undercarriage its right end face is fixedly connected with the solid shell left end face of the dress, the solid shell of dress The solid groove of dress is equipped with its right end face, the supplier is connected with the solid groove sliding of the dress, the solid groove front and rear sides of dress Mutually claim to be equipped with locking hole in inner wall, be equipped with retraction slot in the supplier its right end face, it is mutual in the retraction slot inner left wall It is logical to be equipped with the slid chamber for stretching setting to the left, mutually claim to be equipped with limit up and down at the middle end position in the slid chamber and move groove, up and down Limit described in both sides moves the limited shifting block of interior sliding mating connection between groove, and the limit moves sliding cooperation in the slid chamber on the left of block The solid block of dress is connected with, the solid block right side afterbody of dress moves block left end face secure fit with the limit and is connected, on the solid block of dress Mutually claim to be equipped with ramp-like groove in lower both sides of the face, the solid block of dress mutually claim in the supplier of both sides up and down equipped with to The locking device being connected with the ramp-like groove ejection sliding, the limit move the company of being rotatably assorted in the slid chamber on the right side of block Casing is connected to, spiral is connected with the spiral bar that left and right stretching, extension is set in described sleeve pipe, stretches afterbody on the left of the spiral bar Block its right end face secure fit is moved with the limit to be connected, and endless groove is wrapped with the slid chamber on the outside of described sleeve pipe, it is described The ring tooth being fixedly connected with described sleeve pipe outer surface is wrapped with endless groove, in the supplier on rear side of the endless groove Production component is equipped with equipped with the rackwork to be connected with the ring tooth power, in the spiral bar its right end face.

Preferably technical solution, the locking device include in the supplier through hole of outer end face and Sliding mating connection is arranged on the check lock lever in the through hole, and the check lock lever inner tail is equipped with to head into the ramp-like groove The ramp-like head that interior and ejection sliding is connected, intercommunication, which is equipped with, in the through hole inner left wall leads shifting groove, it is described lead move it is sliding in groove Move be connected be connected with the check lock lever secure fit lead shifting block, it is described to lead described lead in shifting groove moved on the outside of block and be equipped with First suppresses part.

Preferably technical solution, the rackwork include being arranged on shrinkage pool on rear side of the endless groove in inner wall with And left and right stretching, extension is arranged on the steering spindle in the shrinkage pool, stretching, extension afterbody and first drives motor-driven power cooperation on the left of the steering spindle Connection, described first drives machine outer surface to be installed in the shrinkage pool inner left wall and is fixedly connected, and is stretched on the right side of the steering spindle Exhibition afterbody is rotatably assorted with inner wall on the right side of the shrinkage pool and is connected, and the steering spindle outer surface in the shrinkage pool is circumferentially fixed with teeth Shape wheel, the tooth-like wheel bottom outside are headed into the endless groove and are connected with the ring tooth.

Preferably technical solution, the production component include inboard cavity and the sliding being arranged in the spiral bar Be connected and be arranged on interior lateral mass in the inboard cavity, in the inboard cavity on the left of the interior lateral mass ejection be connected with Second suppresses part, and afterbody is installed with the bar that props up for stretching set to the right on the right side of the interior lateral mass, described to prop up stretching, extension on the right side of bar Section is connected through the spiral bar its right end face and sliding, and the bar right side stretching, extension afterbody that props up is headed into the retraction slot And afterbody is installed with bracket, the bracket is equipped with japanning cylinder.

The beneficial effects of the invention are as follows：The configuration of the present invention is simple, it is easy to operate, by being provided with vehicle frame its right end face Falling chamber, cooperation is slid in the chamber that rises and falls undercarriage is installed, spiral coordinates the spiral column for being provided with that stretching, extension is set up and down in undercarriage, Spiral column bottom stretching, extension afterbody is rotatably assorted with the bottom of chamber end wall that rises and falls to be connected, and afterbody is stretched with driving mechanomotive force to be matched somebody with somebody in spiral column top Connection is closed, the machine outer surface of driving, which is fixedly installed in, rises and falls in chamber top end wall, undercarriage its right end face and the solid shell left end face of dress It is fixedly connected, fills and be equipped with the solid groove of dress in shell its right end face admittedly, supplier and the solid groove sliding of dress is connected, before and after the solid groove of dress Mutually claim to be equipped with locking hole in the inner wall of both sides, supplier its right end face is interior to be equipped with retraction slot, in retraction slot inner left wall intercommunication set There is a slid chamber for stretching setting to the left, mutually claim to be equipped with limit up and down at the middle end position in slid chamber and move groove, upper and lower two lateral spacing is moved The limited shifting block of interior sliding mating connection between groove, the interior sliding of slid chamber that limit is moved on the left of block, which is connected with, fills solid block, fills block admittedly Right side afterbody moves block left end face secure fit with limit and is connected, and fills solid block and mutually claims to be equipped with ramp-like groove up and down in both sides of the face, dress is solid Block mutually claims to be equipped with the locking device to be connected with ramp-like groove ejection sliding up and down in the supplier of both sides, and it is right that limit moves block It is rotatably assorted in the slid chamber of side and is connected with casing, spiral is connected with the spiral bar that left and right stretching, extension is set, spiral in casing Stretching, extension afterbody moves block its right end face secure fit with limit and is connected on the left of bar, and endless groove, ring are wrapped with the slid chamber of outside of sleeve Be wrapped with the ring tooth being fixedly connected with bushing outer surface in shape groove, be equipped with the supplier on rear side of endless groove to ring-type The rackwork that tooth power is connected, spiral bar its right end face is interior to be equipped with production component, can realize the bridge for meeting different height Frame external coating works, and reduces worker's amount of labour, improves brushing work efficiency, can realize that automatically controlling japanning cylinder heads into stretching The automatic locking for adjusting work and locking device and solution lock control work, fast and easy dismounting maintenance work, province of saving trouble Power, improves work efficiency, can realize and automatically control japanning cylinder and the compactness on crane span structure surface, improves brushing quality.

Brief description of the drawings

For ease of explanation, the present invention is described in detail by following specific embodiment and attached drawing.

One kind that Fig. 1 is the present invention is used for crane span structure production equipment overall structure diagram；

The dress that Fig. 2 is the present invention consolidates enclosure structure diagram；

Fig. 3 is the supplier internal structure schematic diagram of the present invention.

Embodiment

As shown in Figure 1, Figure 2 and Figure 3, one kind of the invention is used for crane span structure production equipment, including rises and falls and be fitted to car The solid shell 82 of dress on the right side of frame 7 and locking are installed on the supplier 9 in the solid shell 82 of the dress, 7 its right end face of vehicle frame The chamber 71 that rises and falls inside is provided with, cooperation is slid in the chamber 71 that rises and falls undercarriage 72 is installed, spiral coordinates in the undercarriage 72 The spiral column 73 that stretching, extension is set up and down, 73 bottom of the spiral column stretching, extension afterbody and 71 base end wall of the chamber rotation of rising and falling are installed It is connected, the top of spiral column 73 stretching, extension afterbody is described to drive 74 outer surface of machine to be consolidated with driving 74 power of machine to be connected Dingan County rises and falls in 71 top end wall of chamber loaded on described, and 72 its right end face of undercarriage is fixed with solid 82 left end face of shell of the dress Connection, 82 its right end face of the solid shell of dress is interior to be equipped with the solid groove 822 of dress, and the supplier 9 with the dress matches somebody with somebody admittedly by the sliding of groove 822 Connection is closed, mutually claims to be equipped with locking hole 823 in 822 front and rear sides inner wall of the solid groove of dress, is set in 9 its right end face of supplier Have a retraction slot 91, in 91 inner left wall of retraction slot intercommunication be equipped with the slid chamber 92 for stretching setting to the left, the slid chamber Mutually claim to be equipped with limit shifting groove 93 up and down at middle end position in 92, interior sliding between moving groove 93 is limited described in upper and lower both sides and is connected with Limit moves block 931, and the limit moves sliding in the slid chamber 92 in the left side of block 931 and is connected with the solid block 924 of dress, the solid block of dress 924 right side afterbodys move 931 left end face secure fit of block with the limit and are connected, and the solid block of dress is mutual in both sides of the face about 924 Title is equipped with ramp-like groove 9241, the solid block of dress about 924 in the supplier 9 of both sides mutually title equipped with to it is described The locking device that ramp-like 9241 ejection of groove sliding is connected, the limit, which moves to rotate in the slid chamber 92 on the right side of block 931, matches somebody with somebody Conjunction is connected with casing 921, and spiral is connected with the spiral bar 923 that left and right stretching, extension is set, the spiral bar in described sleeve pipe 921 923 left side stretching, extension afterbodys move 931 its right end face secure fit of block with the limit and are connected, the sliding in the outside of described sleeve pipe 921 Endless groove 922 is wrapped with chamber 92, the ring-type being fixedly connected with 921 outer surface of described sleeve pipe is wrapped with the endless groove 922 Tooth 9221, the supplier 9 of the rear side of endless groove 922 is interior to be equipped with to be connected with 9221 power of ring tooth Rackwork, production component is equipped with 923 its right end face of spiral bar.

Valuably, the locking device includes matching somebody with somebody through the through hole 9251 of outer end face in the supplier 9 and sliding The check lock lever 9253 that connection is arranged in the through hole 9251 is closed, 9253 inner tail of check lock lever is equipped with described to head into In ramp-like groove 9241 and ejection sliding is connected ramp-like first 9254, and intercommunication, which is equipped with, in 9251 inner left wall of through hole leads shifting Groove 9252, described lead move sliding in groove 9252 and are connected with and lead shifting block with what 9253 secure fit of check lock lever was connected 9255, described lead in shifting groove 9252 for leading 9255 outside of shifting block suppresses part 9256 equipped with first, so as to fulfill automatically controlling Work is locked, improves the dismounting speed of the present apparatus, fast and easy maintenance work.

Valuably, the rackwork includes shrinkage pool 94 and the left and right being arranged in the 922 rear side inner wall of endless groove Stretching, extension is arranged on the steering spindle 941 in the shrinkage pool 94, and the left side of steering spindle 941 stretching, extension afterbody and first drive machine 943 dynamic Power cooperation connects, and described first drives 943 outer surface of machine to be installed in 94 inner left wall of shrinkage pool and be fixedly connected, described turn It is rotatably assorted and is connected with the 94 right side inner wall of shrinkage pool to the right side of axis 941 stretching, extension afterbody, the steering spindle in the shrinkage pool 94 941 outer surfaces are circumferentially installed with tooth-like wheel 942,942 bottom outside of tooth-like wheel head into the endless groove 922 and with it is described Ring tooth 9221 is connected, so as to fulfill adjusting work and the locking device that japanning cylinder 912 heads into stretching is automatically controlled Automatic locking and solution lock control work, save trouble and labor, improves work efficiency.

Valuably, the production component includes the inboard cavity 9231 being arranged in the spiral bar 923 and sliding coordinates Connection is arranged on the interior lateral mass 9232 in the inboard cavity 9231, is pushed away in the inboard cavity 9231 in the interior left side of lateral mass 9232 Top is connected with second and suppresses part 9233, and what the interior 9232 right side afterbody of lateral mass was installed with that stretching, extension to the right sets props up bar 9234, the 9234 right side stretch section of bar that props up is connected through 923 its right end face of spiral bar and sliding, described to prop up Stretching, extension afterbody in the right side of bar 9234 is headed into the retraction slot 91 and afterbody is installed with bracket 910, and the bracket 910 is equipped with japanning Cylinder 912, so as to fulfill japanning cylinder 912 and the tight fit degree on crane span structure surface is automatically controlled.

During original state, limit moves left-most position of the block 931 in limit shifting groove 93, at this time, moves block 931 by limit and drives dress Gu block 924 slides onto the left-most position in slid chamber 92, meanwhile, make the at utmost right side on spiral bar 923 of casing 921 On outer surface and spiral is connected, and at this time, leads and moves block 9255 and be subject to first to suppress 9256 ejection force of part, makes to lead and moves block 9255 and slide Move to lead and move most inner side in groove 9252, meanwhile, by leading the ramp-like head for moving block 9255 and driving 9253 inner tail of check lock lever 9254 are slid completely into ramp-like groove 9241 and slide mating connection, meanwhile, 9253 end face outside of check lock lever is fully located at production In main body 9, at this time, interior lateral mass 9232 be subject to second suppress 9233 ejection force of part slide onto in inboard cavity 9231 the rightmost side position Put, meanwhile, 9234 right side stretch section of bar is propped up by the drive of interior lateral mass 9232 and is at utmost stretched out outside 923 its right end face of spiral bar, At this time, drive the japanning cylinder 912 propped up on the bracket 910 and bracket 910 of 9234 right side afterbody of bar complete by spiral bar 923 In retraction slot 91.

When needing to install and carrying out brushing work to crane span structure surface, supplier 9 is moved to the solid shell 82 of dress first Right positions, the dress that dress is consolidated in 82 its right end face of shell is consolidated groove 822 and 9 left side afterbody of supplier and be in relative position, Then by dress 822 medial movement supplier 9 of solid groove, making 9 left outer surface of supplier gradually head into the solid groove 822 of dress It is interior, until when 9 left end face of supplier is abutted against with solid 822 inner left wall of groove of dress, at this time, make 9 front and rear sides of supplier The locking hole 823 that through hole 9251 in end face is filled with front and rear sides on 822 inner wall of solid groove respectively is in relative position, then passes through First drives machine 943 to drive steering spindle 941 to rotate, and drives tooth-like wheel 942 to rotate by steering spindle 941, and then by 942 band of tooth-like wheel Casing 921 on dynamic ring tooth 9221 and ring tooth 9221 rotates, and at this time, drives spiral bar 923 gradually along cunning by casing 921 The right direction sliding in chamber 92 is moved, meanwhile, drive limit to move block 931 by spiral bar 923 and the right side side in groove 93 is gradually moved along limit To sliding, at this time, block 931 is moved by limit and drives limit to move the solid block 924 of the dress in 931 left end face of block gradually along the right side in slid chamber 92 Side direction slides, meanwhile, dress is consolidated the ramp-like groove 9241 in 924 front/rear end of block and coordinate company with ramp-like first 9254 ejection sliding Connect, and block 9255 is moved by leading on ramp-like first 9254 drive check lock lever 9253 and check lock lever 9253 and overcomes first to suppress part 9256 The lateral direction sliding that ejection force is gradually moved in groove 9252 along leading, at this time, 9253 outboard end of check lock lever is driven by ramp-like first 9254 Gradually head into locking hole 823, until limit moves block 931 and slides onto the right-most position for limiting and moving in groove 93, at this time, block is moved by limit 931 drive the japanning cylinder propped up on bar 9234 and bracket 910 outside 9253 its right end face of check lock lever 9253 and check lock lever 912 at utmost stretch out outside its right end face of supplier 9, meanwhile, block 931 is moved by limit and drives the dress in the ramp-like left side of groove 9241 to consolidate Outer wall coordinates with the ramp-like first 9254 ejection sliding of front and rear sides respectively before and after block 924, at this time, is driven and locked by ramp-like first 9254 9253 outboard end of bar, which is at utmost headed into locking hole 823, realizes automatic lock fit connection, at this time, by moving carriage 7, makes Japanning cylinder 912 outside 9 its right end face of supplier is connected with the ejection of crane span structure surface elasticity, then, by driving machine 74 73 positive and negative rotation of spiral column is driven, and then solid 82 above-below direction of shell of dress is driven toward polyslip from spiral column 73, and it is solid outer by filling Shell 82 drives supplier 9 and the japanning cylinder 912 stretched out outside 9 its right end face of supplier to carry out automatic reciprocating brushing up and down Work.

The beneficial effects of the invention are as follows：The configuration of the present invention is simple, it is easy to operate, by being provided with vehicle frame its right end face Falling chamber, cooperation is slid in the chamber that rises and falls undercarriage is installed, spiral coordinates the spiral column for being provided with that stretching, extension is set up and down in undercarriage, Spiral column bottom stretching, extension afterbody is rotatably assorted with the bottom of chamber end wall that rises and falls to be connected, and afterbody is stretched with driving mechanomotive force to be matched somebody with somebody in spiral column top Connection is closed, the machine outer surface of driving, which is fixedly installed in, rises and falls in chamber top end wall, undercarriage its right end face and the solid shell left end face of dress It is fixedly connected, fills and be equipped with the solid groove of dress in shell its right end face admittedly, supplier and the solid groove sliding of dress is connected, before and after the solid groove of dress Mutually claim to be equipped with locking hole in the inner wall of both sides, supplier its right end face is interior to be equipped with retraction slot, in retraction slot inner left wall intercommunication set There is a slid chamber for stretching setting to the left, mutually claim to be equipped with limit up and down at the middle end position in slid chamber and move groove, upper and lower two lateral spacing is moved The limited shifting block of interior sliding mating connection between groove, the interior sliding of slid chamber that limit is moved on the left of block, which is connected with, fills solid block, fills block admittedly Right side afterbody moves block left end face secure fit with limit and is connected, and fills solid block and mutually claims to be equipped with ramp-like groove up and down in both sides of the face, dress is solid Block mutually claims to be equipped with the locking device to be connected with ramp-like groove ejection sliding up and down in the supplier of both sides, and it is right that limit moves block It is rotatably assorted in the slid chamber of side and is connected with casing, spiral is connected with the spiral bar that left and right stretching, extension is set, spiral in casing Stretching, extension afterbody moves block its right end face secure fit with limit and is connected on the left of bar, and endless groove, ring are wrapped with the slid chamber of outside of sleeve Be wrapped with the ring tooth being fixedly connected with bushing outer surface in shape groove, be equipped with the supplier on rear side of endless groove to ring-type The rackwork that tooth power is connected, spiral bar its right end face is interior to be equipped with production component, can realize the bridge for meeting different height Frame external coating works, and reduces worker's amount of labour, improves brushing work efficiency, can realize that automatically controlling japanning cylinder heads into stretching The automatic locking for adjusting work and locking device and solution lock control work, fast and easy dismounting maintenance work, province of saving trouble Power, improves work efficiency, can realize and automatically control japanning cylinder and the compactness on crane span structure surface, improves brushing quality.

The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, it is of the invention Protection domain should be determined by the scope of protection defined in the claims.

Claims (4)

1. one kind is used for crane span structure production equipment, including the dress being fitted on the right side of vehicle frame that rises and falls consolidates shell and locking is installed on institute The supplier in the solid shell of dress is stated, the chamber that rises and falls is provided with the vehicle frame its right end face, is slid in the chamber that rises and falls and coordinates peace Equipped with undercarriage, spiral coordinates the spiral column for being provided with that stretching, extension is set up and down, the spiral column bottom stretching, extension in the undercarriage Afterbody is rotatably assorted with the bottom of chamber end wall that rises and falls and is connected, and the spiral column top stretching, extension afterbody is with driving motor-driven power cooperation to connect Connect, it is described drive machine outer surface be fixedly installed in it is described rise and fall in chamber top end wall, the undercarriage its right end face and the dress are solid Shell left end face is fixedly connected, and the solid groove of dress is equipped with the solid shell its right end face of dress, and the supplier and the dress are solid Groove sliding is connected, and mutually claims to be equipped with locking hole in the solid groove front and rear sides inner wall of dress, in the supplier its right end face Equipped with retraction slot, in the retraction slot inner left wall, intercommunication is equipped with stretches the slid chamber of setting to the left, in the slid chamber Mutually claim to be equipped with to limit up and down at middle end position to move groove, limit described in upper and lower both sides moves the limited shifting block of interior sliding mating connection between groove, institute State sliding in the slid chamber that limit is moved on the left of block and be connected with the solid block of dress, afterbody moves block with the limit on the right side of the solid block of dress Left end face secure fit connects, and block mutually claims to be equipped with ramp-like groove up and down the dress in both sides of the face admittedly, and the dress is admittedly on block Mutually claim to be equipped with the locking device to be connected with the ramp-like groove ejection sliding in the supplier of lower both sides, it is described It is rotatably assorted in the slid chamber that limit is moved on the right side of block and is connected with casing, spiral is connected with left and right stretching, extension and sets in described sleeve pipe The spiral bar put, spiral bar left side stretching, extension afterbody moves block its right end face secure fit with the limit and is connected, outside described sleeve pipe Endless groove is wrapped with the slid chamber of side, the ring-type being fixedly connected with described sleeve pipe outer surface is wrapped with the endless groove Tooth, the rackwork to be connected with the ring tooth power is equipped with the supplier on rear side of the endless groove, Production component is equipped with the spiral bar its right end face.

2. one kind according to claim 1 is used for crane span structure production equipment, it is characterised in that：The locking device includes running through The through hole of outer end face and sliding mating connection are arranged on the check lock lever in the through hole, the check lock lever in the supplier Inner tail is equipped with the ramp-like head to head into the ramp-like groove and ejection sliding is connected, in the through hole inner left wall Intercommunication is equipped with and leads shifting groove, it is described lead move sliding in groove be connected be connected with the check lock lever secure fit lead shifting block, institute State described lead in shifting groove led and moved on the outside of block and suppress part equipped with first.

3. one kind according to claim 1 is used for crane span structure production equipment, it is characterised in that：The rackwork includes setting The steering spindle being arranged in the shrinkage pool on rear side of the endless groove in inner wall and left and right stretching, extension in the shrinkage pool, the steering spindle are left Side stretching, extension afterbody drives mechanomotive force to be connected with first, and described first drives machine outer surface to be installed on the shrinkage pool inner left wall Interior and be fixedly connected, stretching, extension afterbody is rotatably assorted with shrinkage pool right side inner wall and is connected on the right side of the steering spindle, in the shrinkage pool The steering spindle outer surface be circumferentially installed with tooth-like wheel, the tooth-like wheel bottom outside head into the endless groove and with it is described Ring tooth is connected.

4. one kind according to claim 1 is used for crane span structure production equipment, it is characterised in that：The production component includes setting Inboard cavity and sliding mating connection in the spiral bar are arranged on the interior lateral mass in the inboard cavity, and the interior lateral mass is left Ejection is connected with second and suppresses part in the inboard cavity of side, and the interior lateral mass right side afterbody is installed with stretching, extension to the right and sets That puts props up bar, and the bar right side stretch section that props up is connected through the spiral bar its right end face and sliding, described to prop up Stretching, extension afterbody is headed into the retraction slot on the right side of bar and afterbody is installed with bracket, and the bracket is equipped with japanning cylinder.