CN221072257U - Trestle convenient to remove - Google Patents

Abstract

The utility model discloses a trestle convenient to move, which comprises a trestle body, a support frame and a driving mechanism, wherein a first guide wheel is arranged at the front end of the trestle body, a second guide wheel is arranged at the rear end of the trestle body, the support frame is connected to the trestle body and can slide relative to the trestle body along the front-rear direction, the support frame is vertically provided with a plurality of first lifting columns, the driving mechanism comprises a winding roller and a driving motor in transmission connection with the winding roller, the winding roller is axially provided with two winding grooves, a first traction rope and a second traction rope are respectively wound in the two winding grooves, the first traction rope is wound on the first guide wheel, the tail end of the first traction rope is connected with the support frame, the second traction rope is wound on the second guide wheel, the tail end of the second traction rope is connected with the support frame, and one of the first traction rope and the second traction rope is wound on the winding roller when the winding roller rotates, and the other traction rope is unwound from the winding roller. The trestle convenient to move provided by the utility model has the advantages that the trestle moves forward more conveniently, and the practicability is better.

Description

Trestle convenient to remove

Technical Field

The utility model relates to tunnel construction equipment, in particular to a trestle convenient to move.

Background

The landing stage is common tunnel construction equipment for supply the platform truck to walk, the rear end of landing stage generally supports in the position that the bottom of tunnel has carried out the concrete construction, the front end of landing stage supports in the position that the bottom of tunnel has not carried out the concrete construction, the below at landing stage middle part is the pouring area that is carrying out the concrete construction, the platform truck is gone to the landing stage middle part, can pour into the concrete and pour in the pouring area, after pouring the regional pouring and maintenance is accomplished, excavate the tunnel in the front of the landing stage, afterwards move forward the landing stage, make the rear end of landing stage support on just the concrete tunnel of maintenance completion, repeat preceding step, can accomplish the construction of tunnel bottom.

In the related art, the landing stage can slidable mounting on the support frame, and specifically, the landing stage is equipped with the guide rail along length direction, and the support frame is equipped with the drive wheel, and drive wheel and guide rail assembly, drive wheel transmission are connected with driving motor, start driving motor, and driving motor can control the drive wheel rotation, through the frictional force between drive wheel and the guide rail, can drive the landing stage and remove. However, because the trestle is heavy, the trestle is driven to move through friction, the phenomenon of skidding easily occurs, the trestle is inconvenient to move forward, and the practicability is poor.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the trestle convenient to move, so that the trestle moves forward more conveniently and has better practicability.

According to the embodiment of the utility model, the landing stage convenient to move comprises a landing stage body, a support frame and a driving mechanism, wherein the front end of the landing stage body is provided with a first guide wheel, the rear end of the landing stage body is provided with a second guide wheel, the support frame is connected to the landing stage body and can slide relative to the landing stage body along the front-rear direction, the support frame is vertically provided with a plurality of telescopic first lifting columns, the first lifting columns can be telescopic to be supported on the ground or separated from the ground, the driving mechanism comprises a winding roller rotatably arranged on the support frame and a driving motor in transmission connection with the winding roller, the winding roller is axially provided with two winding grooves, the two winding grooves are respectively provided with a first traction rope and a second traction rope, the first guide wheel is wound by the first traction rope, the tail end of the first traction rope is connected with the support frame, the second traction rope is wound on the second guide wheel, and the tail end of the second traction rope is connected with the support frame, and when the winding roller rotates, the first traction rope and the second traction rope are wound on the winding roller.

The trestle convenient to move according to the embodiment of the utility model has at least the following beneficial effects:

The landing stage body supports in ground through the first lift post of support frame, and the landing stage body can slide for the support frame along the fore-and-aft direction, when needing the antedisplacement landing stage, starts driving motor, driving motor control wind-up roll rotates towards setting for the direction, makes the second haulage rope rolling to the wind-up inslot that corresponds on the wind-up roll, and corresponding, first haulage rope can be followed the wind-up inslot that corresponds on the wind-up roll and is expanded, and the length of second haulage rope between second leading wheel and support frame can reduce gradually, and the length of first haulage rope between first leading wheel and support frame can increase gradually, because the support frame supports in ground, still motionless to just can pull the landing stage body and move forward. After the landing stage body moves forward to required position, shorten first lift post, make the bottom and the ground separation of first lift post, under this kind of circumstances, landing stage body self supports in ground, start driving motor, driving motor control wind-up roll rotates towards the opposite direction of setting for the direction, can make first haulage rope rolling up the wind-up inslot that corresponds on the wind-up roll, and the second haulage rope can be followed the wind-up inslot that corresponds on the wind-up roll and be expanded, the length of first haulage rope between first leading wheel and support frame can reduce gradually, the length of second haulage rope between second leading wheel and support frame can increase gradually, because landing stage body supports in ground, still motionless, thereby just can pull the support frame and move forward to initial position, so that the landing stage body moves forward next time. According to the trestle convenient to move, forward movement of the trestle body can be achieved through the driving motor to control forward rotation and reverse rotation of the wind-up roll, and compared with an existing forward movement mode, the trestle convenient to operate is more convenient and better in practicality.

According to some embodiments of the utility model, the first guiding wheels are provided with two guiding wheels and are arranged along the left-right direction of the trestle body, the first traction rope winds one side of the two guiding wheels, which is away from each other, the second guiding wheels are provided with two guiding wheels and are arranged along the left-right direction of the trestle body, and the second traction rope winds one side of the two guiding wheels, which is away from each other.

According to some embodiments of the utility model, the support frame is provided with two first positioning wheels at one side of the wind-up roll, which is close to the first guiding wheels, one end of the first traction rope, which is close to the wind-up roll, is wound with one of the first positioning wheels, and the tail end of the first traction rope is wound with the other first positioning wheel.

According to some embodiments of the utility model, the support frame is provided with two second positioning wheels at one side of the wind-up roll, which is close to the second guiding wheels, one end of the second traction rope, which is close to the wind-up roll, is wound with one of the second positioning wheels, and the tail end of the second traction rope is wound with the other second positioning wheel.

According to some embodiments of the utility model, a portion of the first traction rope between the first positioning wheel and the first guiding wheel that are close to each other is defined as a first traction section, the first traction section extends along the front-rear direction of the trestle body, a portion of the second traction rope between the second positioning wheel and the second guiding wheel that are close to each other is defined as a second traction section, the second traction section extends along the front-rear direction of the trestle body, and a distance between two first traction sections is equal to a distance between two second traction sections.

According to some embodiments of the utility model, the top end and the bottom end of the trestle body are both provided with guide rails extending along the length direction, the support frame is provided with two groups of pulleys arranged up and down, the axial direction of the pulleys extends along the left-right direction of the trestle body, the guide rails at the top end of the trestle body are attached to the bottom ends of a group of pulleys above, and the guide rails at the bottom end of the trestle body are supported at the top ends of a group of pulleys below.

According to some embodiments of the utility model, the first lifting column comprises a first sleeve and a first inserted link slidably mounted in the first sleeve, and a first telescopic cylinder is arranged between the first sleeve and the first inserted link.

According to some embodiments of the utility model, the front end of the trestle body is vertically provided with a plurality of second lifting columns, the second lifting columns comprise a second sleeve and a second inserted link slidably mounted in the second sleeve, and a second telescopic oil cylinder is arranged between the second sleeve and the second inserted link.

According to some embodiments of the utility model, a lifting oil cylinder is vertically arranged at the rear end of the trestle body, a mounting frame is arranged at the bottom end of the lifting oil cylinder, travelling wheels are mounted on the mounting frame, and the travelling wheels can be supported on the ground or separated from the ground in the telescopic process of the lifting oil cylinder.

According to some embodiments of the utility model, two ends of the trestle body are rotatably connected with access bridges, a rotation axis of each access bridge extends along the left-right direction of the trestle body, and an adjusting oil cylinder is arranged between each access bridge and the trestle body and used for controlling the access bridge to rotate.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the operation of the drive mechanism;

FIG. 3 is an enlarged view of FIG. 1 at A;

Fig. 4 is an enlarged view of fig. 1 at B.

Reference numerals:

Trestle body 100; a first guide wheel 101; a second guide wheel 102; a guide rail 103; a second lifting column 104; a second sleeve 105; a second plunger 106; a second telescopic cylinder 107; a lift cylinder 108; a mounting rack 109; a road wheel 110; bridge approach 111; an adjustment cylinder 112;

A support frame 200; a first lifting column 201; a first positioning wheel 202; a second positioning wheel 203; a pulley 204; a first sleeve 205; a first plunger 206; a first telescopic cylinder 207;

A driving mechanism 300; a wind-up roller 301; a drive motor 302; a winding groove 303; a first traction rope 304; a second traction rope 305; a first traction segment 306; a second traction segment 307.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

A movable trestle according to an embodiment of the present utility model is described below with reference to fig. 1 to 4.

As shown in fig. 1 to 4, the trestle convenient to move according to the embodiment of the present utility model includes a trestle body 100, a supporting frame 200, and a driving mechanism 300.

The front end of the trestle body 100 is provided with a first guide wheel 101, the rear end of the trestle body 100 is provided with a second guide wheel 102, the support frame 200 is connected to the trestle body 100 and can slide relative to the trestle body 100 along the front-rear direction, the support frame 200 is vertically provided with a plurality of telescopic first lifting columns 201, the first lifting columns 201 can stretch to be supported on the ground or separated from the ground, the driving mechanism 300 comprises a winding roller 301 rotatably mounted on the support frame 200 and a driving motor 302 in transmission connection with the winding roller 301, the winding roller 301 is axially provided with two winding grooves 303, the two winding grooves 303 are respectively wound with a first traction rope 304 and a second traction rope 305, the first traction rope 304 is wound on the first guide wheel 101, the tail end of the first traction rope 304 is connected with the support frame 200, the second traction rope 305 is wound on the second guide wheel 102, the tail end of the second traction rope 305 is connected with the support frame 200, and when the winding roller 301 rotates, one of the first traction rope 304 and the second traction rope 305 is wound on the winding roller 301, and the other traction rope 301 is unwound from the winding roller 301.

In this embodiment, the landing stage body 100 is supported on the ground through the first lifting column 201 of the support frame 200, the landing stage body 100 can slide along the front-rear direction relative to the support frame 200, when the landing stage needs to be moved forward, the driving motor 302 is started, the driving motor 302 controls the winding roller 301 to rotate towards the set direction, so that the second traction rope 305 is wound into the winding groove 303 corresponding to the winding roller 301, correspondingly, the first traction rope 304 is unwound from the winding groove 303 corresponding to the winding roller 301, the length of the second traction rope 305 between the second guide wheel 102 and the support frame 200 is gradually reduced, the length of the first traction rope 304 between the first guide wheel 101 and the support frame 200 is gradually increased, and the landing stage body 100 can be just pulled to move forward due to the fact that the support frame 200 is supported on the ground and is stationary. When the landing stage body 100 moves forward to a desired position, the first lifting column 201 is shortened, the bottom end of the first lifting column 201 is separated from the ground, in this case, the landing stage body 100 supports itself on the ground, the driving motor 302 is started, the driving motor 302 controls the winding roller 301 to rotate in the opposite direction of the set direction, the first traction rope 304 can be wound into the corresponding winding groove 303 on the winding roller 301, the second traction rope 305 can be unwound from the corresponding winding groove 303 on the winding roller 301, the length of the first traction rope 304 between the first guide wheel 101 and the supporting frame 200 is gradually reduced, and the length of the second traction rope 305 between the second guide wheel 102 and the supporting frame 200 is gradually increased, so that the supporting frame 200 can be pulled to move forward to the initial position just because the landing stage body 100 is supported on the ground and is stationary, so that the landing stage body 100 can be moved forward to the next time.

According to the trestle convenient to move, forward movement of the trestle can be achieved by controlling forward rotation and reverse rotation of the winding roller 301 through the driving motor 302, and compared with an existing forward movement mode, the trestle convenient to operate is more convenient and better in practicality.

It should be noted that, the support frame 200 is located between the first guide wheel 101 and the second guide wheel 102, the support frame 200 can slide relative to the trestle body 100 along the front-rear direction, or the support frame 200 is not moved, or the trestle body 100 is not moved, or the support frame 200 is not moved, specifically, when the first lifting column 201 extends to be supported on the ground, the support frame 200 is not moved, the trestle body 100 can slide relative to the support frame 200, and when the first lifting column 201 shortens to be separated from the ground, the trestle body 100 is supported on the ground under such conditions, and then the trestle body 100 is not moved, and the support frame 200 can slide relative to the trestle body 100. The driving motor 302 may be mounted on the support frame 200, an output shaft of the driving motor 302 may be directly and coaxially connected with the wind-up roller 301, or a transmission structure such as a belt or a gear reducer is mounted between the output shaft of the driving motor 302 and the wind-up roller 301, and the driving motor 302 may control the wind-up roller 301 to rotate forward and reverse. The axial direction of wind-up roll 301 can extend along the left and right directions of landing stage body 100, and two wind-up grooves 303 of wind-up roll 301 are arranged along the axial direction of wind-up roll 301, and wind-up grooves 303 encircle wind-up roll 301 along the circumference of wind-up roll 301 to conveniently roll up first haulage rope 304 and second haulage rope 305. The front-rear direction of the trestle body 100, that is, the front-rear direction when the trestle body 100 moves, that is, the length direction of the trestle body 100. The left-right direction of the trestle body 100 is the width direction of the trestle body 100. The first traction rope 304 and the second traction rope 305 are unwound from the wind-up roller 301, that is, the first traction rope 304 and the second traction rope 305 are removed from the wind-up roller 301.

It will be appreciated that, in order to unwind the second pulling rope 305 from the wind-up roller 301 when the first pulling rope 304 is wound around the wind-up roller 301, or unwind the first pulling rope 304 from the wind-up roller 301 when the second pulling rope 305 is wound around the wind-up roller 301, it is necessary to draw the first pulling rope 304 and the second pulling rope 305 from the same position of the wind-up roller 301, for example, the first pulling rope 304 may be drawn forward from the bottom end of the wind-up roller 301, the second pulling rope 305 may be drawn backward from the bottom end of the wind-up roller 301, or, of course, the first pulling rope 304 may be drawn forward from the top end of the wind-up roller 301, and the second pulling rope 305 may be drawn backward from the top end of the wind-up roller 301.

In some embodiments of the present utility model, as shown in fig. 2, the first guiding wheels 101 are arranged in two directions along the left-right direction of the trestle body 100, the first traction ropes 304 are wound around the sides of the two first guiding wheels 101 facing away, the second guiding wheels 102 are arranged in two directions along the left-right direction of the trestle body 100, and the second traction ropes 305 are wound around the sides of the two second guiding wheels 102 facing away. That is, the first traction rope 304 passes through one side of deviating from the two first guide wheels 101, passes through one side of deviating from the wind-up roller 301 of the two first guide wheels 101, the second traction rope 305 passes through one side of deviating from the two second guide wheels 102, and passes through one side of deviating from the wind-up roller 301 of the two second guide wheels 102, so that the acting force applied to the trestle body 100 and the supporting frame 200 is more uniform, the traction is more stable, and the traction effect is better.

In some embodiments of the present utility model, as shown in fig. 2 and 3, two first positioning wheels 202 are disposed on a side of the winding roller 301 near the first guiding wheel 101, one first positioning wheel 202 is wound on an end of the first traction rope 304 near the winding roller 301, and the other first positioning wheel 202 is wound on an end of the first traction rope 304. The two first positioning wheels 202 are arranged, one end, close to the supporting frame 200, of the first traction rope 304 can be guided and positioned, the position of the first traction rope 304 between the first positioning wheels 202 and the first guiding wheels 101 is unchanged, the traction effect of the first traction rope 304 is better, and interference can be reduced.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the supporting frame 200 is provided with two second positioning wheels 203 on one side of the wind-up roller 301 near the second guiding wheel 102, one second positioning wheel 203 is wound around one end of the second hauling rope 305 near the wind-up roller 301, and the other second positioning wheel 203 is wound around the other end of the second hauling rope 305. The two second positioning wheels 203 are arranged, so that one end, close to the supporting frame 200, of the second haulage rope 305 can be guided and positioned, the position of the second haulage rope 305 between the second positioning wheels 203 and the second guiding wheels 102 is unchanged, the haulage effect of the second haulage rope 305 is better, and interference can be reduced.

In some embodiments of the present utility model, as shown in fig. 2, a portion of the first traction rope 304 between the adjacent first positioning wheel 202 and the first guiding wheel 101 is defined as a first traction segment 306, the first traction segment 306 extends along the front-rear direction of the trestle body 100, a portion of the second traction rope 305 between the adjacent second positioning wheel 203 and the second guiding wheel 102 is defined as a second traction segment 307, and the second traction segment 307 extends along the front-rear direction of the trestle body 100, wherein a distance between the two first traction segments 306 is equal to a distance between the two second traction segments 307. In this way, when the support frame 200 is moved, the amount of increase in the portion of the first traction rope 304 outside the wind-up roller 301 can be made substantially equal to the amount of decrease in the portion of the second traction rope 305 outside the wind-up roller 301, or the amount of decrease in the portion of the first traction rope 304 outside the wind-up roller 301 can be made substantially equal to the amount of increase in the portion of the second traction rope 305 outside the wind-up roller 301. When the wind-up roller 301 rotates in the set direction, the first traction rope 304 can be smoothly unfolded from the wind-up roller 301, the second traction rope 305 can be smoothly rolled onto the wind-up roller 301, and when the wind-up roller 301 rotates in the opposite direction of the set direction, the first traction rope 304 can be smoothly rolled onto the wind-up roller 301, the second traction rope 305 can be smoothly unfolded from the wind-up roller 301, so that interference phenomenon can be avoided, and the movement of the support frame 200 is smoother.

In some embodiments of the present utility model, as shown in fig. 3, the top end and the bottom end of the trestle body 100 are both provided with the guide rail 103 extending along the length direction, the support frame 200 is provided with two sets of pulleys 204 arranged up and down, the axial direction of the pulleys 204 extends along the left-right direction of the trestle body 100, the guide rail 103 at the top end of the trestle body 100 is attached to the bottom end of the upper set of pulleys 204, and the guide rail 103 at the bottom end of the trestle body 100 is supported at the top end of the lower set of pulleys 204. Through the cooperation of pulley 204 and guide rail 103, not only can realize the sliding connection of support frame 200 and landing stage body 100, be rolling friction between pulley 204 and the guide rail 103 moreover, and then make the frictional force between landing stage body 100 and the support frame 200 less to remove landing stage body 100 and support frame 200 more smooth and easy, the required effort is less.

In some embodiments of the present utility model, as shown in fig. 3, the first lifting column 201 includes a first sleeve 205 and a first plunger 206 slidably mounted within the first sleeve 205, and a first telescopic ram 207 is provided between the first sleeve 205 and the first plunger 206. Specifically, the first telescopic cylinder 207 may extend vertically, and the first telescopic cylinder 207 may be started to control the first plunger 206 and the first sleeve 205 to slide relatively, so as to implement the telescopic operation of the first lifting column 201, with simple structure and convenient operation. It should be noted that, the first lifting column 201 may have other structures, for example, may be a vertically arranged cylinder.

In some embodiments of the present utility model, as shown in fig. 1 and 3, a plurality of second lifting columns 104 are vertically disposed at the front end of the trestle body 100, and the second lifting columns 104 include a second sleeve 105 and a second insert rod 106 slidably mounted in the second sleeve 105, and a second telescopic cylinder 107 is disposed between the second sleeve 105 and the second insert rod 106. The second lifting column 104 is arranged, so that when the trestle needs to work, the trestle can be supported together with the first lifting column 201, and the trestle is supported more stably. When the trestle body 100 needs to be moved, the second telescopic oil cylinder 107 is started, the second telescopic oil cylinder 107 controls the second sleeve 105 and the second inserting rod 106 to slide relatively so as to shorten the second lifting column 104, the bottom end of the second lifting column 104 is separated from the ground, the trestle body 100 can be moved conveniently, when the support frame 200 needs to be moved, the second telescopic oil cylinder 107 controls the second sleeve 105 and the second inserting rod 106 to slide relatively so as to extend the second lifting column 104, the bottom end of the second lifting column 104 is supported on the ground, and then the first lifting column 201 is shortened, so that the support frame 200 can be moved conveniently.

In some embodiments of the present utility model, as shown in fig. 4, a lift cylinder 108 is vertically disposed at the rear end of the trestle body 100, a mounting frame 109 is disposed at the bottom end of the lift cylinder 108, and a travelling wheel 110 is mounted on the mounting frame 109, where the travelling wheel 110 can be supported on the ground or separated from the ground during the extension and retraction of the lift cylinder 108. Starting lift cylinder 108, can controlling the mounting bracket 109 and go up and down to control walking wheel 110 goes up and down, when the landing stage needs to walk, make walking wheel 110 down move to support in ground, walking wheel 110 and then can drive the landing stage and remove, when the landing stage during operation, make walking wheel 110 up move to with ground separation, avoid the landing stage to remove at will through walking wheel 110, and then make the landing stage support more firm.

In some embodiments of the present utility model, as shown in fig. 1, 3 and 4, two ends of a trestle body 100 are rotatably connected with a bridge approach 111, a rotation axis of the bridge approach 111 extends along a left-right direction of the trestle body 100, and an adjusting oil cylinder 112 is disposed between the bridge approach 111 and the trestle body 100, and the adjusting oil cylinder 112 is used for controlling the rotation of the bridge approach 111. When the trestle is needed to be used, the adjusting oil cylinder 112 is started, the adjusting oil cylinder 112 drives the corresponding approach bridge 111 to rotate, so that the corresponding approach bridge 111 rotates to extend downwards in a downward inclined mode along the direction away from the trestle body 100, the tail end of the approach bridge 111 is supported on the ground, a trolley can conveniently pass through, when the trestle needs to be moved, the adjusting oil cylinder 112 is started, the approach bridge 111 rotates to be separated from the ground at the tail end of the approach bridge 111, the trestle can conveniently move, and the trestle is convenient to use.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. Trestle convenient to remove, its characterized in that includes:

The landing stage body, the front end of landing stage body is equipped with first leading wheel, the rear end of landing stage body is equipped with the second leading wheel;

The support frame is connected to the trestle body and can slide relative to the trestle body along the front-back direction, a plurality of telescopic first lifting columns are vertically arranged on the support frame, and the first lifting columns can stretch to be supported on the ground or be separated from the ground;

The driving mechanism comprises a winding roller and a driving motor, wherein the winding roller is rotatably arranged on the supporting frame, the driving motor is in transmission connection with the winding roller, two winding grooves are formed in the winding roller along the axial direction, a first traction rope and a second traction rope are respectively wound on the winding grooves, the first traction rope is wound on a first guide wheel, the tail end of the first traction rope is connected with the supporting frame, the second traction rope is wound on a second guide wheel, the tail end of the second traction rope is connected with the supporting frame, and when the winding roller rotates, one of the first traction rope and the second traction rope is wound on the winding roller, and the other one of the first traction rope and the second traction rope is unwound on the winding roller.

2. The trestle convenient to move according to claim 1, wherein two first guide wheels are arranged along the left-right direction of the trestle body, two first traction ropes are wound on one sides of the two first guide wheels, two second guide wheels are arranged along the left-right direction of the trestle body, and two second traction ropes are wound on one sides of the two second guide wheels.

3. The trestle convenient to move according to claim 2, wherein the support frame is provided with two first positioning wheels on one side of the wind-up roller, which is close to the first guide wheels, one end of the first traction rope, which is close to the wind-up roller, is wound with one of the first positioning wheels, and the tail end of the first traction rope is wound with the other one of the first positioning wheels.

4. The trestle convenient to move according to claim 3, wherein the support frame is provided with two second positioning wheels on one side of the winding roller, which is close to the second guiding wheels, one end of the second traction rope, which is close to the winding roller, is wound with one second positioning wheel, and the tail end of the second traction rope is wound with the other second positioning wheel.

5. The mobile-friendly landing stage of claim 4 wherein the portion of the first traction rope between the adjacent first positioning wheel and first guide wheel is defined as a first traction segment extending in the fore-and-aft direction of the landing stage body, and the portion of the second traction rope between the adjacent second positioning wheel and second guide wheel is defined as a second traction segment extending in the fore-and-aft direction of the landing stage body, wherein the distance between two of the first traction segments is equal to the distance between two of the second traction segments.

6. The movable trestle according to any of claims 1 to 5, wherein guide rails extending along the length direction are provided at the top end and the bottom end of the trestle body, two sets of pulleys arranged up and down are provided on the support frame, the axial direction of the pulleys extends along the left-right direction of the trestle body, the guide rails at the top end of the trestle body are attached to the bottom ends of a set of pulleys above, and the guide rails at the bottom end of the trestle body are supported at the top ends of a set of pulleys below.

7. The mobile landing stage of any one of claims 1 to 5, wherein the first lifting column comprises a first sleeve and a first plunger slidably mounted within the first sleeve, a first telescopic ram being provided between the first sleeve and the first plunger.

8. The portable landing stage of any one of claims 1 to 5, wherein a plurality of second lifting columns are vertically arranged at the front end of the landing stage body, the second lifting columns comprise second sleeves and second inserting rods slidably mounted in the second sleeves, and second telescopic cylinders are arranged between the second sleeves and the second inserting rods.

9. The portable landing stage of any one of claims 1 to 5, wherein the rear end of the landing stage body is vertically provided with a lifting cylinder, the bottom end of the lifting cylinder is provided with a mounting frame, the mounting frame is provided with a travelling wheel, and the travelling wheel can be supported on the ground or separated from the ground during the telescopic process of the lifting cylinder.

10. The bridge according to any one of claims 1 to 5, wherein two ends of the bridge body are rotatably connected with an approach bridge, a rotation axis of the approach bridge extends along a left-right direction of the bridge body, and an adjusting cylinder is arranged between the approach bridge and the bridge body and is used for controlling the approach bridge to rotate.