CN112252200A

CN112252200A - Telescopic structure for bridge construction and use method

Info

Publication number: CN112252200A
Application number: CN202011363944.7A
Authority: CN
Inventors: 程靖童
Original assignee: Wenzhou Fangduo Construction Co ltd
Current assignee: Wenzhou Fangduo Construction Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-01-22

Abstract

The invention relates to the technical field of buildings, in particular to a telescopic structure for bridge construction and a using method thereof. According to the invention, an acting force is provided for the telescopic mechanism through the linkage mechanism, and when the transverse force is converted into the straight force to drive the structure to contract, the group of transverse force is driven to push the support rods on the two sides to expand outwards, so that the bottom end forms a triangular support, the top end can be conveniently stretched and the bottom end is more stable, and the problems that the telescopic mechanism for bridge construction needs another support structure and a plurality of people operate to support the top end while the top end is stretched and the working efficiency is influenced due to the complicated and complicated use are solved.

Description

Telescopic structure for bridge construction and use method

Technical Field

The invention relates to the technical field of buildings, in particular to a telescopic structure for bridge construction and a using method thereof.

Background

The bridge construction refers to the construction of highways, high-speed railways and urban elevated buildings, and in the bridge construction, no matter what bridge type, the bridge needs to be constructed, and supports need to be used in the construction process.

For the site environment of bridge construction, because the required environment of the shape or the internal structure of the bridge is different, the bridge deck angle that needs to be built is different, and the bridge deck is hung in the air and is built in midair, leans on both sides to support, and the bottom is hung in the air, for guaranteeing that workman's brief chapter is convenient and reasonable, need advance nature to support the bottom, and because support the angle difference, this support needs contract.

The existing telescopic structure for bridge construction has the following defects:

firstly, the existing telescopic structure for bridge construction can only realize the up-and-down extension of the bridge in the using process, and different problems that the telescopic fixed support of the bottom structure is stable, so that the device has defects in use,

secondly, current telescopic structure for bridge construction bottom still need install stabilizing mean when using to control its mechanism, need many people to operate, comparatively loaded down with trivial details complicacy.

The long-term use of the contraction mechanism is that the inner contraction is in long-term contact with the inner part of the bottom outer rod, and no protection exists during contact, so that the mechanism is easily damaged, and the service life of the mechanism is influenced.

Based on the above, the invention provides a telescopic structure for bridge construction and a using method thereof, which are used for solving the problems.

Disclosure of Invention

The invention aims to provide a telescopic structure for bridge construction and a using method thereof, which have the advantages of safety, energy conservation, dust removal, filtration and accelerated improvement of indoor air quality, and solve the problems that the introduced air cannot be purified in the actual using process of the conventional ventilation equipment, the ventilation equipment is not environment-friendly and energy-saving after being used for a long time, and the high-quality air cannot be timely and effectively provided for workers.

In order to achieve the purpose, the invention provides the following technical scheme: the telescopic structure comprises a telescopic structure main body, telescopic loop bars are symmetrically and fixedly connected to the outer side of the top end of the telescopic structure main body, a telescopic inner bar is connected to the inner part of each telescopic loop bar through a telescopic mechanism, the top ends of the telescopic inner bars are fixedly connected to the outer side of the bottom end of a top plate, a plurality of groups of anti-abrasion lugs are fixedly connected to the top ends of the top plates, first grooves are formed in the middle parts of the top ends of the telescopic loop bars, two groups of pressure reduction protection mechanisms are arranged at the bottom ends of the first grooves, two groups of first lead screws are symmetrically connected to the inner side of the bottom end of the top plate through rotating shafts, one ends, far away from the top plate, of the first lead screws are connected to the inner side of the top end of the telescopic structure main body through rotating shafts, belt pulleys are arranged at the bottom ends of the first lead screws, the two groups of belt pulleys are connected through, the right side middle part fixedly connected with second lead screw of second conical gear, and the right side of second lead screw runs through the middle part of flexible loop bar and extends to connect at the left side middle part of second connecting rod, the right side fixedly connected with control mechanism of second connecting rod, and the bottom middle part of first lead screw all overlaps and is equipped with circular gear, and circular gear outside rack all with rack plate inner rack intermeshing, the front end of rack plate all connects at the rear end of flexible loop bar through moving mechanism, and rack plate's inboard all has glued the protection cushion, all overlap on the top outer wall of first lead screw and be equipped with the screw, two sets of the inboard of screw is passed through the third connecting rod and is connected, and the outside of screw all passes through connecting block fixed connection in the inboard middle part of second fixed block, the top of flexible inner pole is all fixed connection to the second fixed block, the outside of rack plate all passes through switching shaft fixed connection in the inboard middle part of auxiliary stay, and the top of the auxiliary support rod is fixedly connected to a third fixed block, the inner side of the third fixed block is fixedly connected to the outer wall of the telescopic loop bar, the bottom of the auxiliary support rod is fixedly connected to a connecting plate block, and two sets of sliding-assisting mechanisms are arranged outside the bottom of the connecting plate block.

Preferably, telescopic machanism includes first slide rail, first slider and head rod, first slide rail has all been seted up to the outside both ends of flexible loop bar symmetry, and the inboard all sliding connection of first slide rail has first slider, the inboard all fixed connection of first slider is in the outside middle part of head rod, and the top middle part all fixedly connected with telescopic inner rod of head rod.

Preferably, the decompression protection mechanism comprises a second slide rail, a second slide block, a support block, a first connecting block, a third slide rail, a first fixed block, a protection plate and a first return spring, wherein a plurality of groups of second slide rails are symmetrically arranged at the bottom end of the first groove, the top ends of the second slide rails are all slidably connected with the second slide block, the top ends of the second slide blocks are all fixedly connected with the support block and are all fixedly connected with the middle part of the first connecting block, the two ends of the first connecting block are all fixedly connected with the third slide block, the third slide blocks are all slidably connected inside the third slide rail, the third slide rails are all arranged at the inner ends of the upper and lower ends of the first fixed block, the first fixed block is all fixedly connected with the bottom end of the protection plate, and the inner ends of the first connecting block are connected with the first return spring through welding.

Preferably, the top of guard plate equidistance is provided with the multiunit protection lug, and the material of protection lug is the rubber material.

Preferably, control mechanism includes the auxiliary rod, changes handle and handle cover, the right side outer end equidistance fixedly connected with multiunit auxiliary rod of second connecting rod, and the right side of auxiliary rod all fixed connection in the left side of changeing the handle, the cover is equipped with handle cover on the right side outer wall of commentaries on classics handle, and the outside of handle cover is provided with anti-skidding line.

Preferably, moving mechanism includes fourth slider and fourth slide rail, the front end middle part of rack plate all fixedly connected with fourth slider, and the inside of the all sliding connection of fourth slider at fourth slide rail, the middle part rear end at flexible loop bar is all seted up to the fourth slide rail.

Preferably, it includes fourth fixed block, second fluting, second reset spring, fourth connecting rod, second connecting block, bottom plate and helps the pulley to help smooth mechanism, connect the bottom outside of plate two sets of fourth fixed blocks of all fixedly connected with, and the middle part of fourth fixed block has all seted up the second fluting, second reset spring has all been welded at the grooved top middle part of second, and the second reset spring keeps away from the one end on second fluting top and all welds the top at the fourth connecting rod, the bottom middle part of fourth connecting rod all fixedly connected with second connecting block, and the bottom middle part that the fourth fixed block was all run through in the bottom of second connecting block extends fixed connection at the top middle part of bottom plate, the bottom of bottom plate is all equidistance fixed be provided with two sets of pulleys that help, and helps the pulley bottom all laminate with the top of extending structure main part.

Preferably, the outer sides of the fourth connecting rods are fixedly connected to the middle of the inner side of the fifth sliding block, the fifth sliding block is connected to the inside of the fifth sliding rail in a sliding mode, and the fifth sliding rail is symmetrically arranged on the inner wall of the outer side of the fourth fixing block.

Preferably, the inner side of the bottom end of the connecting plate block is fixedly connected with a plurality of groups of conical blocks at equal intervals, and the formal sections of the conical blocks are triangular.

The use method of the telescopic structure for bridge construction comprises the following use steps:

firstly, in the actual use process, under the action of force obtained by rotating the handle sleeve, the transverse force is converted into straight force through the mutual meshing of the second bevel gear and the first bevel gear, and the supporting structure is driven to stretch and retract.

Two, make second bevel gear drive the first lead screw of connecting first bevel gear rotate through rotating the second lead screw, the belt pulley and the belt strip that first lead screw bottom set up this moment cooperate each other to drive two sets of first lead screws and rotate simultaneously to drive the screw that first lead screw top was taken care of about and move on first lead screw, further drive the second fixed block that connects through the third connecting rod and drive flexible interior pole and contract in the inside of flexible loop bar, thereby make this mechanism contract.

Thereby the circular gear that first lead screw bottom was billowed and is taken care of through the rotation of first lead screw rolls to drive and remove with the rack board case outside of circular gear intermeshing, thereby it makes the fourth slider comparatively stable when removing to drive the bottom connection plate piece of the auxiliary stay pole that flexible loop bar outside is connected to move to the outside through mutually supporting with rack board fixed connection's fourth slider and fourth slide rail.

And fourthly, driving the bottom plate connected with the second connecting block outside the bottom of the connecting plate block when the outer side of the auxiliary supporting rod box is opened under the mutual matching of the circular gear and the rack plate to drive the top of the pulley-assisting laminating telescopic structure main body to slide under the elastic action of a second reset spring, and when the rack plate stops moving, connecting the conical block arranged on the inner side of the bottom of the connecting plate block and the top of the telescopic structure main body to generate friction force, so that the position of the auxiliary supporting rod is fixed.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, an acting force is provided for the telescopic mechanism through the linkage mechanism, and when the transverse force is converted into the straight force to drive the structure to contract, the group of transverse force is driven to push the support rods on the two sides to expand outwards, so that the bottom end forms a triangular support, the top end can be conveniently stretched and the bottom end is more stable, and the problems that the telescopic mechanism for bridge construction needs another support structure and a plurality of people operate to support the top end while the top end is stretched and the working efficiency is influenced due to the complicated and complicated use are solved.

Drawings

FIG. 1 is a schematic diagram of a formal cross-sectional structure of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of the structure of FIG. 1 at C according to the present invention;

FIG. 5 is an enlarged view of FIG. 1 at D according to the present invention;

FIG. 6 is a formal schematic diagram of a first screw rod, a first bevel gear, a second bevel gear and a second screw rod with partial structures according to the present invention;

FIG. 7 is a top down schematic view of a partial circular gear and rack plate according to the present invention;

fig. 8 is a top-down schematic view of a partial structure rack plate, a fourth slide block, a fourth slide rail and a protective cushion according to the present invention.

In the figure: 1. a telescoping structure body; 2. a telescopic loop bar; 201. a first slide rail; 202. a first slider; 203. a first connecting rod; 204. a first slot; 205. a second slide rail; 206. a second slider; 207. a support block; 208. a first connection block; 209. a third slider; 210. a third slide rail; 211. a first fixed block; 212. a protection plate; 213. a protection bump; 214. a first return spring; 3. a telescopic inner rod; 301. a second fixed block; 4. a top plate; 401. an anti-abrasion bump; 402. a first lead screw; 403. a belt pulley; 404. a belt strip; 405. a first bevel gear; 406. a second bevel gear; 407. a second lead screw; 408. a second connecting rod; 409. an auxiliary lever; 410. turning a handle; 411. a handle sleeve; 412. a nut; 413. a third connecting rod; 414. a circular gear; 415. a rack plate; 416. a fourth slider; 417. a fourth slide rail; 418. a protective cushion; 5. an auxiliary support bar; 501. a third fixed block; 6. connecting the plates; 601. a conical block; 602. a fourth fixed block; 603. a second slot; 604. a second return spring; 605. a fourth connecting rod; 606. a second connecting block; 607. a base plate; 608. a pulley aid; 609. a fifth slider; 610. and a fifth slide rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-7, the present invention provides a technical solution: the telescopic structure for bridge construction comprises a telescopic structure main body 1, telescopic loop bars 2 are symmetrically and fixedly connected to the outer side of the top end of the telescopic structure main body 1, a telescopic inner rod 3 is connected to the inner part of each telescopic loop bar 2 through a telescopic mechanism, the top ends of the telescopic inner rods 3 are all fixedly connected to the outer side of the bottom end of a top plate 4, a plurality of groups of anti-abrasion bumps 401 are fixedly connected to the top end of the top plate 4, first slots 204 are all formed in the middle of the top end of each telescopic loop bar 2, two groups of pressure reduction protection mechanisms are all arranged at the bottom ends of the first slots 204, two groups of first lead screws 402 are all symmetrically connected to the inner side of the bottom end of the top plate 4 through a rotating shaft, one ends, far away from the top plate 4, of the first lead screws 402 are all connected to the inner side of the top end of the telescopic structure main body 1 through rotating shafts, belt pulleys 403 are all, the rack on the outer side of the first bevel gear 405 is meshed with the rack of the second bevel gear 406, the middle part on the right side of the second bevel gear 406 is fixedly connected with a second screw rod 407, the right side of the second screw rod 407 penetrates through the middle part of the telescopic sleeve rod 2 and extends to be connected with the middle part on the left side of the second connecting rod 408, the right side of the second connecting rod 408 is fixedly connected with a control mechanism, the middle part on the bottom end of the first screw rod 402 is sleeved with a round gear 414, the racks on the outer side of the round gear 414 are meshed with the racks on the inner end of a rack plate 415, the front end of the rack plate 415 is connected with the rear end of the telescopic sleeve rod 2 through a moving mechanism, the inner sides of the rack plate 415 are glued with a protective cushion 418, the outer wall on the top end of the first screw rod 402 is sleeved with a nut 412, the inner sides of the two groups of nuts 412 are connected through a, the top of the pole 3 in flexible is all fixed connection to the second fixed block 301, the outside of rack plate 415 all is through adapter shaft fixed connection at the inboard middle part of auxiliary stay pole 5, and the top of auxiliary stay pole 5 all is through fixed connection on third fixed block 501, the inboard all fixed connection of third fixed block 501 is on the outer wall of flexible loop bar 2, the bottom all fixedly connected with of auxiliary stay pole 5 connects plate 6, and the bottom outside of connecting plate 6 all is provided with two sets of smooth mechanisms that help.

As a preferable embodiment of the present embodiment: telescopic machanism includes first slide rail 201, first slider 202 and head rod 203, first slide rail 201 has been seted up to the outside both ends of flexible loop bar 2 all the symmetry, and the inboard all sliding connection of first slide rail 201 has first slider 202, the inboard all fixed connection of first slider 202 is at the outside middle part of head rod 203, and the top middle part of head rod 203 all the telescopic inner rod 3 of fixedly connected with, setting through telescopic machanism, make first slide rail 201 and first slider 202 mutually support down comparatively stable to telescopic inner rod 3 when flexible loop bar 2 is inside to shrink more stable.

As a preferable embodiment of the present embodiment: the pressure reduction protection mechanism comprises second slide rails 205, second slide blocks 206, supporting blocks 207, first connecting blocks 208, third slide blocks 209, third slide rails 210, first fixing blocks 211, protection plates 212 and first return springs 214, wherein a plurality of groups of second slide rails 205 are symmetrically arranged at the bottom ends of the first grooves 204, the top ends of the second slide rails 205 are connected with the second slide blocks 206 in a sliding manner, the top ends of the second slide blocks 206 are connected with the supporting blocks 207 in a fixed manner, the top ends of the supporting blocks 207 are connected with the middle parts of the first connecting blocks 208 in a fixed manner, the two ends of the first connecting blocks 208 are connected with the third slide blocks 209 in a sliding manner, the third slide rails 210 are arranged at the inner ends of the upper and lower ends of the first fixing blocks 211, the first fixing blocks 211 are connected with the bottom ends of the protection plates 212 in a fixed manner, the inner ends of the two groups of first connecting blocks 208 are connected with the first return springs 214 through welding, through the arrangement of the decompression protection mechanism, the force for buffering can be generated during the contact between the bottom end of the telescopic inner rod 3 and the groove of the first open groove 204 arranged inside the telescopic loop bar 2, so that the structure is safer and more reasonable.

Example two

As a preferable embodiment of the present embodiment: the top end of the protection plate 212 is equidistantly provided with a plurality of groups of protection lugs 213, and the protection lugs 213 are all made of rubber.

As a preferable embodiment of the present embodiment: control mechanism includes auxiliary rod 409, change 410 and handle cover 411, the equidistant fixedly connected with multiunit auxiliary rod 409 in right side outer end of second connecting rod 408, and the equal fixed connection in right side of auxiliary rod 409 changes the left side of 410, it is equipped with handle cover 411 to change on the right side outer wall of 410, and the outside of handle cover 411 is provided with anti-skidding line, setting through control mechanism, can produce power to comparatively stable rotation handle cover 411, and the outside of handle cover 411 forms a frictional power with the hand, place the hand landing when rotating, make this structure more complete stable.

As a preferable embodiment of the present embodiment: the moving mechanism comprises a fourth sliding block 416 and a fourth sliding rail 417, the middle part of the front end of the rack plate 415 is fixedly connected with the fourth sliding block 416, the fourth sliding block 416 is slidably connected inside the fourth sliding rail 417, and the fourth sliding rail 417 is arranged at the rear end of the middle part of the telescopic loop bar 2.

As a preferable embodiment of the present embodiment: the sliding-assistant mechanism comprises a fourth fixed block 602, a second slot 603, a second reset spring 604, a fourth connecting rod 605, a second connecting block 606, a bottom plate 607 and a sliding-assistant wheel 608, wherein the outer sides of the bottom ends of the connecting plates 6 are fixedly connected with two groups of fourth fixed blocks 602, the middle parts of the fourth fixed blocks 602 are provided with the second slot 603, the middle parts of the top ends of the second slot 603 are welded with the second reset spring 604, one end of the second reset spring 604 far away from the top end of the second slot 603 is welded at the top end of the fourth connecting rod 605, the middle parts of the bottom ends of the fourth connecting rod 605 are fixedly connected with the second connecting block 606, the bottom ends of the second connecting blocks 606 all penetrate through the middle parts of the bottom ends of the fourth fixed blocks 602 to extend and be fixedly connected to the middle part of the top end of the bottom plate 607, the bottom ends of the bottom plate 607 are all fixedly provided with two groups, through the arrangement of the sliding-assistant mechanism, the auxiliary supporting rod 5 can be stably expanded outside the telescopic loop bar 2, so that the device is more stable.

As a preferable embodiment of the present embodiment: the outer sides of the fourth connecting rods 605 are all fixedly connected to the middle of the inner side of the fifth sliding blocks 609, the fifth sliding blocks 609 are all slidably connected to the inside of the fifth sliding rails 610, and the fifth sliding rails 610 are all symmetrically arranged on the inner wall of the outer side of the fourth fixed block 602.

As a preferable embodiment of the present embodiment: the inner side of the bottom end of the connecting plate 6 is fixedly connected with a plurality of groups of conical blocks 601 at equal intervals, and the formal sections of the conical blocks 601 are all triangular.

firstly, in the actual use process, under the action of the force obtained by rotating the handle sleeve 411, the transverse force is converted into the straight force through the mutual meshing of the second bevel gear 406 and the first bevel gear 405, and the supporting structure is driven to stretch and contract.

Second, make second bevel gear 406 drive the first lead screw 402 of connecting first bevel gear 405 rotate through rotating second lead screw 407, belt pulley 403 and belt strip 404 that first lead screw 402 bottom set up at this moment cooperate each other and drive two sets of first lead screw 402 and rotate simultaneously, thereby drive the screw 412 of taking a bill of on the top of first lead screw 402 and move on first lead screw 402, further drive the inside of the flexible interior pole 3 of second fixed block 301 drive through third connecting rod 413 connection and contract in flexible loop bar 2, thereby make this mechanism contract.

Third, thereby the circular gear 414 that the bottom of first lead screw 402 was billowed through the rotation of first lead screw 402 rolls to the rack plate 415 case outside that drives and circular gear 414 intermeshing moves, thereby the mutual cooperation through fourth slider 416 and fourth slide rail 417 with rack plate 415 fixed connection makes fourth slider 416 comparatively stable when moving and thereby drives the outside removal of plate 6 is connected to the bottom of the auxiliary stay 5 that the telescopic sleeve pole 2 outside is connected.

Fourthly, the bottom plate 607 connected with the second connecting block 606 outside the bottom end of the connecting plate 6 drives the pulley block 608 to be attached to the top end of the telescopic structure main body 1 to slide under the elastic action of the second return spring 604 when the circular gear 414 and the rack plate 415 are mutually matched to drive the auxiliary support rod 5 to open, when the rack plate 415 stops moving, the conical block 601 arranged on the inner side of the bottom end of the connecting plate 6 generates friction force with the top end of the telescopic structure main body 1, and the position of the auxiliary support rod 5 is saved for fixing.

To sum up: this extending structure and application method are used in bridge construction, setting through control mechanism, for this extending structure provides the effect power of required power when using, stretch out and draw back this mechanism under extending mechanism and decompression protection mechanism's cooperation use afterwards, use simultaneously under moving mechanism and the cooperation of helping smooth mechanism, carry out stable expansion to auxiliary stay pole 5 in this structure outside, can reach and drive the ascending flexible and outside support of this mechanism simultaneously under the effect of a power, this extending structure and application method are used in bridge construction, the extending structure is used in the actual use to some bridge construction of having solved, need carry out the support installation of supplementary stable structure in the structure outside, need many people to operate, comparatively loaded down with trivial details problem.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The working principle is as follows: the handle sleeve 411 is rotated to drive the second bevel gear 406 connected with the second screw rod 407 to rotate, the second bevel gear 406 and the first bevel gear 405 are meshed with each other to drive the right first screw rod 402 to rotate, the belt pulley 403 and the belt strip 404 arranged at the bottom end of the first screw rod 402 are matched with each other to drive the two groups of first screw rods 402 to rotate simultaneously, at this time, the telescopic inner rod 3 of the second fixed block 301 connected with the screw nut 412 can be driven to contract inside the telescopic loop bar 2 under the auxiliary support of the first slide rail 201 and the first slide block 202, meanwhile, the rack plate 415 which is meshed with the circular gear 414 on the nut 412 is driven to move outwards under the auxiliary stability of the fourth slider 416 and the fourth slide rail 417, so that the bottom end of the auxiliary support rod 5 connected to the outer side of the telescopic loop bar 2 is further driven to expand on the telescopic structure main body 1, and the bottom end of the telescopic structure when the upper end of the telescopic structure is expanded is stably supported.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Extending structure is used in bridge construction, including extending structure main part (1), its characterized in that: the telescopic structure comprises a telescopic structure main body (1), wherein telescopic loop bars (2) are symmetrically and fixedly connected to the outer side of the top end of the telescopic structure main body (1), the telescopic loop bars (2) are connected to the inner part of a telescopic inner rod (3) through a telescopic mechanism, the top ends of the telescopic inner rods (3) are fixedly connected to the outer side of the bottom end of a top plate (4), a plurality of groups of anti-abrasion convex blocks (401) are fixedly connected to the top end of the top plate (4), first grooves (204) are formed in the middle of the top end of each telescopic loop bar (2), two groups of pressure reduction protection mechanisms are arranged at the bottom ends of the first grooves (204), two groups of first lead screws (402) are symmetrically connected to the inner side of the bottom end of the top plate (4) through rotating shafts, belt pulleys (403) are arranged at the bottom ends of the first lead screws (402), two sets of belt pulleys (403) are connected through a belt strap (404), the right side is connected with a first bevel gear (405) in a sleeved mode on the outer wall of the bottom end of a first screw rod (402), racks on the outer side of the first bevel gear (405) are meshed with racks of a second bevel gear (406), the middle of the right side of the second bevel gear (406) is fixedly connected with a second screw rod (407), the right side of the second screw rod (407) penetrates through the middle of a telescopic sleeve rod (2) to extend to be connected to the middle of the left side of a second connecting rod (408), a control mechanism is fixedly connected to the right side of the second connecting rod (408), circular gears (414) are sleeved in the middle of the bottom end of the first screw rod (402), racks on the outer side of the circular gears (414) are meshed with racks on the inner end of a rack plate (415), the front ends of the rack plates (415) are connected to the rear end of the telescopic sleeve rod (, and the inboard of rack plate (415) all is glued with protection cushion (418), all the cover is equipped with screw (412) on the top outer wall of first lead screw (402), two sets of the inboard of screw (412) is passed through third connecting rod (413) and is connected, and the outside of screw (412) all passes through connecting block fixed connection in the inboard middle part of second fixed block (301), second fixed block (301) all fixed connection is on the top of flexible interior pole (3), the outside of rack plate (415) all passes through switching shaft fixed connection in the inboard middle part of auxiliary stay pole (5), and the top of auxiliary stay pole (5) all passes through fixed connection on third fixed block (501), the inboard of third fixed block (501) all fixed connection on the outer wall of flexible loop bar (2), the bottom of auxiliary stay pole (5) all fixed connection plate (6), and two sets of sliding-assisting mechanisms are arranged on the outer sides of the bottom ends of the connecting plates (6).

2. The telescopic structure for bridge construction according to claim 1, wherein: telescopic machanism includes first slide rail (201), first slider (202) and head rod (203), first slide rail (201) have all been seted up to the outside both ends of flexible loop bar (2) symmetry, and the inboard all sliding connection of first slide rail (201) has first slider (202), the inboard all fixed connection of first slider (202) is at the outside middle part of head rod (203), and the top middle part of head rod (203) all fixedly connected with pole (3) in flexible.

3. The telescopic structure for bridge construction according to claim 1, wherein: the decompression protection mechanism comprises a second slide rail (205), a second slide block (206), a support block (207), a first connecting block (208), a third slide block (209), a third slide rail (210), a first fixed block (211), a protection plate (212) and a first reset spring (214), wherein a plurality of groups of second slide rails (205) are symmetrically arranged at the bottom end of the first slot (204), the top ends of the second slide rails (205) are all slidably connected with the second slide block (206), the top ends of the second slide blocks (206) are all fixedly connected with the support block (207), the top ends of the support block (207) are all fixedly connected with the middle part of the first connecting block (208), the two ends of the first connecting block (208) are all fixedly connected with the third slide block (209), the third slide blocks (209) are all slidably connected inside the third slide rail (210), and the third slide rails (210) are all arranged at the upper end and the lower end of the first fixed block (211), and first fixed block (211) all fixed connection are in the bottom of guard plate (212), and the inner of two sets of first connecting block (208) all connects through welding first reset spring (214).

4. The telescopic structure for bridge construction according to claim 3, wherein: the top of guard plate (212) equidistance is provided with multiunit protection lug (213), and the material of protection lug (213) is the rubber material.

5. The telescopic structure for bridge construction according to claim 1, wherein: control mechanism includes auxiliary rod (409), changes (410) and handle cover (411), the right side outer end equidistance fixedly connected with multiunit auxiliary rod (409) of second connecting rod (408), and the right side of auxiliary rod (409) all fixed connection change the left side of (410), it is equipped with handle cover (411) to change on the right side outer wall of (410), and is provided with anti-skidding line to the outside of gloves (411).

6. The telescopic structure for bridge construction according to claim 1, wherein: the moving mechanism comprises a fourth sliding block (416) and a fourth sliding rail (417), the middle of the front end of the rack plate (415) is fixedly connected with the fourth sliding block (416), the fourth sliding block (416) is connected to the inside of the fourth sliding rail (417) in a sliding mode, and the fourth sliding rail (417) is arranged at the rear end of the middle of the telescopic loop bar (2).

7. The telescopic structure for bridge construction according to claim 5, wherein: the sliding assisting mechanism comprises a fourth fixing block (602), a second groove (603), a second reset spring (604), a fourth connecting rod (605), a second connecting block (606), a bottom plate (607) and a sliding assisting wheel (608), wherein the outer sides of the bottom ends of the connecting plate blocks (6) are fixedly connected with two groups of fourth fixing blocks (602), the middle parts of the fourth fixing blocks (602) are provided with the second groove (603), the middle parts of the top ends of the second groove (603) are welded with the second reset spring (604), one ends of the second reset spring (604), far away from the top ends of the second groove (603), are welded at the top ends of the fourth connecting rod (605), the middle parts of the bottom ends of the fourth connecting rod (605) are fixedly connected with the second connecting block (606), and the bottom ends of the second connecting block (606) extend through the middle parts of the bottom ends of the fourth fixing blocks (602) and are fixedly connected with the middle parts of the top ends of the, two groups of auxiliary pulleys (608) are fixedly arranged at the bottom end of the bottom plate (607) at equal intervals, and the bottom ends of the auxiliary pulleys (608) are attached to the top end of the telescopic structure main body (1).

8. The telescopic structure for bridge construction according to claim 7, wherein: the outer sides of the fourth connecting rods (605) are fixedly connected to the middle of the inner side of the fifth sliding blocks (609), the fifth sliding blocks (609) are slidably connected to the inner portion of the fifth sliding rails (610), and the fifth sliding rails (610) are symmetrically arranged on the inner wall of the outer side of the fourth fixing block (602).

9. The telescopic structure for bridge construction according to claim 1, wherein: the inner side of the bottom end of the connecting plate block (6) is fixedly connected with a plurality of groups of conical blocks (601) at equal intervals, and the formal sections of the conical blocks (601) are triangular.

10. A method of using a telescopic structure for bridge construction, comprising the telescopic structure for bridge construction according to any one of claims 1 to 9, the method comprising the steps of:

in the actual use process, under the action of force obtained by rotating the handle sleeve (411), the transverse force is converted into straight force through the mutual meshing of the second bevel gear (406) and the first bevel gear (405), and the supporting structure is driven to stretch and contract;

secondly, the second bevel gear (406) drives the first screw rod (402) connected with the first bevel gear (405) to rotate by rotating the second screw rod (407), and at the moment, a belt pulley (403) and a belt strip (404) arranged at the bottom end of the first screw rod (402) are matched with each other to drive two groups of first screw rods (402) to rotate simultaneously, so that a nut (412) shot at the top end of the first screw rod (402) is driven to move on the first screw rod (402), and a second fixed block (301) connected through a third connecting rod (413) is further driven to drive the telescopic inner rod (3) to contract in the telescopic sleeve rod (2), so that the mechanism contracts;

thirdly, the circular gear (414) which is shot at the bottom end of the first screw rod (402) is driven to roll through the rotation of the first screw rod (402), so that the outer side of a rack plate (415) box which is meshed with the circular gear (414) is driven to move, and the fourth slider (416) is relatively stable during moving through the mutual matching of the fourth slider (416) fixedly connected with the rack plate (415) and a fourth slide rail (417), so that the bottom end connecting plate block (6) of the auxiliary support rod (5) connected with the outer side of the telescopic sleeve rod (2) is driven to move outwards;

fourthly, bottom plate (607) that second connecting block (606) outside the bottom of connecting plate block (6) connects when the box outside of drive auxiliary stay pole (5) opens under mutually supporting of circular gear (414) and rack plate (415) drives the top that helps pulley (608) laminating extending structure main part (1) under the elastic action of second reset spring (604) and slides, when treating rack plate (415) stop motion, toper piece (601) and extending structure main part (1) top that the inboard setting in connection plate block (6) bottom produced frictional force, the position of leaving auxiliary stay pole (5) is fixed.