CN109811636B

CN109811636B - Telescopic platform

Info

Publication number: CN109811636B
Application number: CN201910180796.6A
Authority: CN
Inventors: 高德祥
Original assignee: Hangzhou Xo Lift Co Ltd
Current assignee: Hangzhou Xo Lift Co Ltd
Priority date: 2019-03-11
Filing date: 2019-03-11
Publication date: 2024-05-03
Anticipated expiration: 2039-03-11
Also published as: CN109811636A

Abstract

The invention provides a telescopic platform, which comprises a first fixed platform and a telescopic overpass arranged in a sliding way relative to the first fixed platform, wherein the first fixed platform comprises a first pedal and a driving assembly positioned below the first pedal, a storage space is arranged between the first pedal and the driving assembly, and the telescopic overpass has a retracted state positioned in the storage space and an extended state extending out of the storage space; the telescopic overpass comprises a second pedal which is driven by the driving assembly to stretch and retract, and two sides of the second pedal are provided with foldable guard rails; the telescopic overpass is provided with a transmission mechanism connected with the guard rail, the first fixed table is provided with a trigger piece, and the trigger piece drives the guard rail to be unfolded through the transmission mechanism when the telescopic overpass is switched into an extending state. The invention has the advantages of convenient use, safety, reliability and wide application range.

Description

Telescopic platform

Technical Field

The invention relates to the technical field of temporary channels, in particular to a telescopic platform.

Background

In life-time practice, it is often necessary to build temporary channels for people to walk. For example, in the production process of a factory workshop, a fixed channel cannot be set for a long time due to the limitation of equipment space, and the channel needs to be added regularly or temporarily; in social life, a standby channel may need to be opened temporarily; in artistic performances, to increase the performance scenes, a temporary channel is also required for transporting personnel or props for enriching the performance contents.

The overpass built on site often lacks flexibility, not only consumes manpower, but also has poor adaptability to different site environments, and the safety of the overpass is difficult to ensure.

Disclosure of Invention

The telescopic platform is convenient to use, safe, reliable and wide in application range.

The telescopic platform comprises a first fixed platform and a telescopic overpass which is arranged in a sliding way relative to the first fixed platform, wherein the first fixed platform comprises a first pedal and a driving assembly positioned below the first pedal, a storage space is formed between the first pedal and the driving assembly, and the telescopic overpass has a retracted state positioned in the storage space and an extended state extending out of the storage space;

The telescopic overpass comprises a second pedal which is driven by the driving assembly to stretch and retract, and two sides of the second pedal are provided with foldable guard rails;

the telescopic overpass is provided with a transmission mechanism connected with the guard rail, the first fixed table is provided with a trigger piece, and the trigger piece drives the guard rail to be unfolded through the transmission mechanism when the telescopic overpass is switched into an extending state.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the first fixed platform further comprises two guide rails laid side by side, the storage space is between the two guide rails, travelling wheels are mounted on two sides of the second pedal, and each travelling wheel moves along the guide rail on the corresponding side;

the first fixed table further comprises a riding wheel for bearing the second pedal.

Optionally, the guide rail has a C-shaped cross section, and the travelling wheel is located inside the C-shape.

Optionally, along the direction of extension of flexible overpass, the travelling wheel is installed in the rear side of second footboard, the riding wheel is in the front side of accommodation space.

Optionally, the driving assembly includes:

A base positioned below the first pedal;

a motor mounted on the base;

a drive gear coupled to the motor;

A pair of top wheels mounted on the base;

The bottom of the second pedal is provided with a rack which is limited between the driving gear and the opposite top wheel and meshed with the driving gear.

Optionally, the second pedal includes:

Two side-by-side support beams;

A plurality of cross beams connected between the two support beams;

A bedplate laid on the support beam and the plurality of cross beams;

The bottoms of the cross beams are fixedly provided with mounting beams paved along the moving direction of the telescopic overpass, and the racks are fixedly attached to the mounting beams; the opposite top wheels are propped against one side of the mounting beam, which is opposite to the rack;

the riding wheels are matched with the bottom surfaces of the corresponding side supporting beams.

Optionally, the guard rail comprises a cross bar and a plurality of support bars hinged between the cross bar and the second pedal; the transmission mechanism is connected with at least one supporting rod; the supporting rods on the same side of the second pedal are respectively hinged on the supporting beams on the same side.

Optionally, in the guard rail in the folded state, the support bar and the cross bar are both proximate to the support beams on the respective sides.

Optionally, the transmission mechanism includes:

the first transmission piece is fixed with one of the support rods;

A second transmission member hinged to the first transmission member;

and the trigger wheel is connected to the second transmission part in a switching way and walks along the guide rail.

Optionally, the telescopic platform further comprises a second fixed platform, and the telescopic overpass is butted between the first fixed platform and the second fixed platform in an extended state; and an inclined plane supporting table for guiding the telescopic overpass to be put in place is arranged on one side of the second fixed table, which faces the first fixed table.

The telescopic platform provided by the invention has a compact mechanical structure, realizes the uniformity of the flexibility of channel on-off and the safety of use, and has a wide application range.

Drawings

FIG. 1 is a schematic view of an embodiment of a telescopic platform in an initial state, wherein a telescopic overpass is in a retracted state;

FIG. 2 is a schematic view of the telescopic platform of FIG. 1 in another state, wherein the telescopic overpass is in an extended state and the guard rail is in a folded state;

FIG. 3 is a schematic view of the telescopic platform of FIG. 1 in another state, wherein the telescopic overpass is in an extended state and the guard rail is in an extended state;

FIG. 4 is a schematic view of a telescopic overpass in an extended state and docked with a second stationary table;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a side view of FIG. 2;

FIG. 7 is a side view of FIG. 3;

FIG. 8 is a schematic view of a first stationary table;

FIG. 9 is a side view of the first stationary table of FIG. 8;

FIG. 10 is a schematic view of the telescopic overpass of FIG. 1;

FIG. 11 is a top view of the telescoping overpass of FIG. 10;

FIG. 12 is a side view of the telescoping overpass of FIG. 10;

FIG. 13 is a schematic view of the guard rail and the driving mechanism in FIG. 3;

FIG. 14 is an enlarged view of region B of FIG. 5;

FIG. 15 is an enlarged view of area A of FIG. 3;

FIG. 16 is an enlarged view of region C of FIG. 2;

FIG. 17 is a schematic view of a second stationary platen;

fig. 18 is a side view of fig. 17.

Reference numerals in the drawings are described as follows:

1. A first fixed stage; 11. a first pedal; 12. a drive assembly; 121. a base; 1211. a base cross beam; 1212. a base stringer; 1213. a mounting plate; 1214. a mounting hole; 122. a motor; 123. a drive gear; 124. a top wheel; 13. a trigger; 131. a fixed stop block; 132. a movable stop block; 14. a guide rail; 15. a riding wheel; 151. a first limit flange; 16. a first base; 17. a first vertical beam; 18. a first vertical beam; 19. a first cross beam; 110. a first rail standing beam; 111. a first rail vertical beam; 2. a telescopic overpass; 21. a second pedal; 211. a travelling wheel; 2111. a limit flange; 212. a rack; 213. a support beam; 2131. an inclined plane; 214. a cross beam; 215. a platen; 216. mounting a beam; 22. a guard rail; 221. a cross bar; 2211. a support lug; 222. a support rod; 2221. a hinge ear; 23. a transmission mechanism; 231. a first transmission member; 232. a second transmission member; 233. a trigger wheel; 3. a first rotating shaft; 4. a second rotating shaft; 5. a second fixed stage; 51. an inclined plane supporting table; 52. a second pedal; 53. and a second guard rail.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1,2 and 3, a telescopic platform includes a first fixed base 1 and a telescopic overpass 2 slidably provided with respect to the first fixed base 1. The first fixed table 1 comprises a first pedal 11 and a driving assembly 12 positioned below the first pedal 11, a storage space is formed between the first pedal 11 and the driving assembly 12, and the telescopic overpass has a retracted state positioned in the storage space as shown in fig. 1 and an extended state extending out of the storage space as shown in fig. 2 and 3.

As shown in fig. 3, the telescopic overpass 2 includes a second pedal 21 that is driven to telescope by a driving assembly, and two sides of the second pedal 21 are provided with foldable guard rails 22. The telescopic overpass is provided with a transmission mechanism 23 connected with the guard rail, the first fixed table is provided with a trigger piece 13, and the trigger piece 13 drives the guard rail 22 to be unfolded through the transmission mechanism 23 when the telescopic overpass 2 is switched into an extension state.

The first fixed table 1 is a basic supporting structure of the telescopic platform, and the fixed position of the first fixed table 1 is selected according to the field environment when the telescopic platform is used. The first fixing table 1 can be fixed on the ground by self gravity or a corresponding connecting piece; when the telescopic platform is in state transition, the position of the first fixed platform 1 is not changed any more.

On the one hand, the first fixing table 1 is used for raising the telescopic overpass 2, and on the premise of not damaging the original pedestrian or transportation channel, a second channel is built. The second channels and the first channels are arranged in a vertically staggered mode, so that the adjustment to the original field environment is small, and the adaptability is high.

Another aspect of the first stationary stage 1 is to provide support for the telescopic overpass 2 in the extended state. The other end of the telescopic overpass 2 may or may not be provided with a supporting structure according to the different field application environments. Under the scene that the other end of the telescopic overpass 2 is free of a supporting structure, when the telescopic overpass 2 is in an unfolding state, the first fixing table 1 provides reverse torque for the telescopic overpass 2 by means of self gravity or a connecting structure with the ground, and overcomes the torque generated by the gravity at the extending end of the telescopic overpass 2, so that the telescopic overpass 2 is kept horizontal.

The first fixed table 1 can also be used as a fixed bridge section which is in butt joint with the telescopic overpass 2. In the retracted state of the telescopic overpass 2, personnel or material can be previously stopped on the first fixed table 1; in the extended state of the telescopic overpass 2, the first fixing table 1 is butted with the telescopic overpass 2 to form a continuous channel, so that personnel or materials can be conveniently and directly transferred from the first pedal 11 to the second pedal 21.

The storage space is the storage space of the telescopic overpass 2 in the retracted state. Through setting up the accommodation space in the below of first footboard 11, on the one hand when making flexible overpass 2 carry out the state switch between the state of retracting and the state of extending, do not pass through the top of first footboard 11, therefore can not exert an influence to personnel or material on the first footboard 11, more high-efficient and safe. On the other hand, the telescopic overpass 2 is also arranged under the first pedal 11 in the extended state, and the material handling difficulty is reduced.

The driving assembly 12 drives the telescopic overpass 2 to slide along the first fixed table 1 to realize the transition between the extended state and the retracted state. The whole extending process of the telescopic overpass 2 leaving the storage space is in an extending state, specifically, the extending state comprises a state that the telescopic overpass 2 extends out of the first fixing table 1 but the protective rail 22 is in a folding state as shown in fig. 2; also included is the extended and retracted overpass 2 shown in fig. 3 extended from first stationary stage 1, but guard rail 22 in the extended position.

During the extension process of the telescopic overpass 2, the driving component 12 drives the second pedal 21 to slide along the first fixed table 1, the guard rail 22 and the transmission mechanism 23 connected to the second pedal 21 slide synchronously with the second pedal 21, and the trigger piece 13 is blocked on the sliding path of the transmission mechanism 23. After the telescopic overpass 2 reaches the state shown in fig. 2, the second pedal 21 is located in front of the first pedal 11, the second pedal 21 continues to advance under the drive of the drive assembly 12, a part of the transmission mechanism 23 interferes with the trigger piece 13, the transmission mechanism 23 does not slide synchronously with the second pedal 21 any more, and the state of the transmission mechanism 23 changes and causes the guard rail 22 to be converted from the folded state to the unfolded state.

The driving component 12 is the only power source of the telescopic platform, not only provides power for the telescopic movement of the second pedal 21, but also provides power for the stretching movement of the guard rail 22, and the state conversion of the telescopic platform can be realized only by controlling the forward and reverse two-way movement of the driving component 12, so that the on-off conversion of the second channel is realized, and the telescopic platform is convenient and quick. The second passage is connected and corresponds to the expansion of the guard rail 22, so that safety guarantee is provided for pedestrians on the telescopic overpass 2. Besides the driving component 12 below the first pedal 11, other parts of the telescopic platform do not need a power source, so that a circuit is not involved, and the telescopic platform does not need to consider the safety problem possibly caused by cable bending when in state switching. The telescopic platform realizes the unification of the flexibility of channel on-off and the safety of use, and has wide application range.

In one embodiment, as shown in fig. 2, 6, 7 and 10, the first fixing table 1 further includes two guide rails 14 laid side by side, the storage space is between the two guide rails 14, and the running wheels 211 are mounted on two sides of the second pedal 21, and each running wheel 211 moves along the guide rail 14 on the corresponding side. The first fixed table 1 also comprises a riding wheel 15 for bearing a second pedal 21. The sliding of the telescopic overpass 2 is guided by the guide rail 14, so that the running precision of the telescopic overpass 2 is improved; the telescopic overpass 2 is borne by the travelling wheels 211 and the riding wheels 15, so that the sliding resistance of the telescopic overpass 2 is reduced, and the flexibility of state conversion of the telescopic platform is improved.

In one embodiment, as shown in fig. 8 and 9, the first fixing table 1 further includes a first base 16, a plurality of first vertical beams 17 fixed above both sides of the first base 16, a first vertical beam 18 fixed at the top ends of the plurality of first vertical beams 17 on the same side, and a plurality of first cross beams 19 fixed between the two first vertical beams 18. The first tread 11 is fixed on top of the first vertical beam 18 and the first transverse beam 19. A plurality of first column vertical beams 110 are arranged on two sides of the first pedal 11, and first column vertical beams 111 are fixed on the tops of the plurality of first column vertical beams 110 positioned on the same side. The first vertical beam 18 and the first rail vertical beam 110 each extend in the same direction as the rail 14.

Further, in one embodiment, as shown in FIG. 6, rail 14 has a C-shaped cross-section with the running wheel 211 inside the C-shape. The running wheel 211 is installed at the rear side of the second pedal 21 in the extending direction of the telescopic overpass 2, and the riding wheel 15 is at the front side of the receiving space. The C-section rail includes a top wall, a bottom wall, and side walls connected between the top wall and the bottom wall. The guide rail 14 is fixed to the first standing beam 17 of the first fixing table 1 on the corresponding side by the side wall. When the center of gravity of the telescopic overpass 2 is located on the first fixed platform, as shown in fig. 1, the guide rail 14 and the riding wheel 15 jointly provide support for the telescopic overpass 2, and the travelling wheel 211 rotates positively in contact with the bottom wall of the guide rail 14; when the center of gravity of the telescopic overpass 2 leaves the first fixed platform, as shown in fig. 2, the riding wheel 15 is located at the front side of the travelling wheel 211, the travelling wheel 211 contacts with the top wall of the guide rail 14 to rotate reversely, the riding wheel 15 and the travelling wheel 211 jointly provide reverse moment for the telescopic overpass 2, so that the front end of the telescopic overpass 2 is prevented from sagging due to gravity, and the flexibility of the telescopic overpass 2 in the telescopic process is ensured.

In one embodiment, as shown in fig. 6, the driving assembly includes a base 121 located under the first pedal 11, a motor 122 mounted on the base 121, a driving gear 123 coupled with the motor 122, and a counter wheel 124 mounted on the base 121. The bottom of the second pedal 21 is provided with a rack 212 which is constrained between the drive gear 123 and the counter wheel 124 and which meshes with the drive gear 123.

Specifically, the base 121 includes two base beams 1211 connected between the first upright beams 17 on opposite sides of the first fixed stage 1, and a plurality of base stringers 1212 connected between the two base beams 1211. A mounting plate 1213 is fixed to the top of each of the adjacent base stringers 1212, and mounting holes 1214 are provided in the mounting plate 1213. The output shaft of the motor 122 faces upward and passes through the mounting hole 1214, and the upper portion of the motor 122 is fixed to the mounting plate 1213. A vertical rotating shaft is fixed to the mounting plate 1213, and the counter wheel 124 is a bearing fixed to the rotating shaft.

The motor 122 drives the driving gear 123 to rotate, and the forward or reverse rotation of the driving gear 123 drives the telescopic overpass 2 to stretch along the first fixed table 1. The rack 212 is clamped between the top wheel 124 and the drive gear 123 to prevent the telescopic overpass 2 from being laterally offset when longitudinally telescopic.

In one embodiment, as shown in fig. 10, 11, and 12, the second step 21 includes two side-by-side support beams 213, a plurality of cross beams 214 connected between the two support beams 213, and a platen 215 laid on the support beams 213 and the plurality of cross beams 214. As shown in fig. 6, the bottom of the plurality of cross beams 214 is fixed with a mounting beam 216 laid along the moving direction of the telescopic overpass, and the rack 212 is fixed on the mounting beam 216 in a leaning manner; the opposite top wheel 124 is pressed against the side of the mounting beam 216 facing away from the rack 212; the riding wheels 15 are engaged with the bottom surfaces of the corresponding side support beams 213. The telescopic overpass 2 has a width smaller than that of the first fixed stage 1 and is located at the middle of the first fixed stage 1 in the width direction, and a gap is formed between the support beam 213 and the guide rail 14, and the guard rail 22 and the transmission mechanism are located in the gap in the retracted state. One pair of base longitudinal beams 1212 on the base 121 is arranged below the gap, a transverse rotating shaft is fixed on the base longitudinal beams 1212, a pair of riding wheels 15 are respectively and rotatably arranged on the rotating shafts on the corresponding sides, a first limit flange 151 is arranged on one side, close to the base longitudinal beams 1212, of the riding wheels 15, the first limit flange 151 abuts against the outer side of the corresponding side supporting beam 213, the second pedal 21 is clamped from two ends of the second pedal 21 in the width direction, the second pedal 21 is prevented from being transversely deflected, and the stability of the telescopic platform is improved.

In one embodiment, as shown in fig. 3, the guard rail 22 includes a cross bar 221 and a plurality of support bars 222 hinged between the cross bar 221 and the second pedal 21; the transmission mechanism is connected with at least one supporting rod 222; each support bar 222 on the same side of the second step 21 is hinged to a support beam 213 on that side. As shown in fig. 1,2, and 6, in the guard rail 22 in the folded state, the support bar 222 and the cross bar 221 are each proximate to the support beam 213 on the corresponding side. As shown in fig. 3, 7 and 13, in the guard rail 22 in the extended state, a plurality of support rods 222 are vertically arranged, and the upper ends thereof are connected to the cross bars 221 and the lower ends thereof are connected to the support beams 213.

In one embodiment, as shown in fig. 13, 14 and 15, the transmission mechanism 23 includes a first transmission member 231 fixed to one of the support rods 222, a second transmission member 232 hinged to the first transmission member 231, and a trigger wheel 233 connected to the second transmission member 232 and running along the guide rail 14. The trigger 13 includes a fixed stopper 131 fixed in the guide rail 14 and a movable stopper 132 detachably mounted in the guide rail 14. Specifically, the fixed stopper 131 may be fixed to the guide rail 14 by welding or a bolt, and the movable stopper 132 may be connected to the movable stopper 132 by a bolt, an adhesive, or the like. The stop position of the trigger wheel 233 can be adjusted by increasing or decreasing the number of the movable stoppers 132 or adjusting the distance between the movable stoppers 132 and the fixed stoppers 131.

Specifically, the first transmission member 231 is fixedly connected to one of the support rods 222, and the hinge portion between the first transmission member 231 and the second transmission member 232 is deviated from the length direction of the support rod 222. The first transmission member 231 and the trigger wheel 233 are respectively connected to opposite ends of the second transmission member 232.

Further, in one embodiment, as shown in fig. 3, 7 and 10, the running wheel 211 is rotatably installed at the rear end of the support bar 222 through the first rotation shaft 3. The first transmission member 231 is welded and fixed with the support rod 222 at the rearmost end of the telescopic overpass 2, and the connection part of the first transmission member 231 and the support rod 222 is rotatably mounted at the front end of the support rod 222 through the second rotating shaft 4. When the telescopic platform is in state transition, the guard rail 22 and the transmission mechanism 23 do not interfere with the first rotating shaft 3.

As shown in fig. 16, the first transmission member 231 and the support bar 222 are rod-shaped and are in the same plane so as to be received between the guide rail 14 and the support beam 213 as shown in fig. 6. As shown in fig. 7, in the unfolded state of the guard rail 22, the cross bar 221 is located directly above the support beam 213. Specifically, as shown in fig. 3 and 13, a plurality of lugs 2211 are arranged at the lower part of the cross bar 221, and projections on a horizontal plane overlap with each other. In the folded state of the guard rail 22, a pair of hinge lugs 2221 spaced apart from each other are provided at the upper end of the support bar 222, and the lugs 2211 are rotatably installed between the pair of hinge lugs 2221 by means of a rotation shaft. As shown in fig. 6, in the folded state of the guard rail 22, the cross bar 221 interferes with the support bar 222 at the hinge portion of the lug 2211 and the hinge lug 2221, and the upper surface of the cross bar 221 is not higher than the top surface of the platen 215 so as to be retracted into the storage space.

In one embodiment, as shown in fig. 4, 5, 17 and 18, the telescopic platform further comprises a second fixed table 5, and the telescopic overpass 2 is butted between the first fixed table 1 and the second fixed table 5 in the extended state; the second fixing base 5 is provided with a slope support base 51 for guiding the telescopic overpass 2 to be placed in position on the side facing the first fixing base 1. As shown in fig. 10, one end of the support beam 213 is provided with a slope 2131 which acts on the slope support stand 51. As shown in fig. 17 and 18, the second fixing table 5 further includes a second pedal 52 and second guard rails 53 fixed to both sides of the second pedal 52. After telescoping overpass 2 is in place, deck 215 is positioned below second tread 52.

In one embodiment, as shown in fig. 1-18, two running wheels 211 are symmetrically rotatably mounted on the rear end of the support beam 213, with opposite end sides of the running wheels 211 having limit flanges 2111 to prevent the running wheels 211 from being laterally offset from the guide rail 14 in the event of an accident. During normal operation of the telescopic platform, the second pedal 21 cannot move laterally due to the clamping of the two sides of the drive gear 123 and the top wheel 124, and the limit flange 2111 does not contact the guide rail 14, and does not act. When an accident occurs, the second pedal 21 moves laterally, and the limiting flange 2111 of one of the running wheels 211 is sized so that the other running wheel 211 does not disengage from the guide rail 14 when it abuts against the guide rail 14, thereby providing further safety against lateral displacement of the second pedal 21.

The length of the first transmission member 231 is 1/3-1/5 of the length of the support rod 222, and the included angle between the first transmission member 231 and the support rod 222 connected with the first transmission member 231 is 30-45 degrees, so that the folded guard rail 22 has a smaller height. The length of the second transmission piece 232 is longer than the distance between the fixed stop 131 and the front end face of the first pedal 11, so that the guard rail 22 does not interfere with the first pedal 11 in the unfolding process, and the unfolded cross bar 221 is adjacent to the first rail vertical beam 111.

The working process of the telescopic platform is as follows:

initially, as shown in fig. 1, the telescopic overpass 2 is folded and stored in the storage space below the first step 11. The traveling wheel 211 supports the rear end of the telescopic overpass 2, the riding wheel 15 supports the front end of the telescopic overpass 2, and the trigger wheel 233 is stopped in the guide rail 14 but does not support the second pedal.

The motor 122 is a gear motor, and the motor 122 drives the second pedal 21, the guard rail 22 and the transmission mechanism 23 to slide horizontally through the driving gear 123 and the rack 212 until the trigger wheel 233 on the transmission mechanism 23 is blocked by the movable stop block 132 arranged on the guide rail 14. At this time, the cross bar 221 is located in front of the first pedal 11, and a gap exists between the last support bar 222 of the three rows of support bars and the riding wheel 15.

The second pedal 21 continues to advance, and the upper end of the first transmission member 231 is restricted by the trigger wheel 233 and the second transmission member 232, and starts to swing backward around the axis of the trigger wheel 233. Meanwhile, the lower end of the first driving member 231 is hinged to the rear end of the supporting beam 213, and the supporting bar 222 swings backward along with the first driving member 231 until the supporting bar 222 is perpendicular to the supporting beam 213, and the rear rail 221 cannot move relative to the supporting bar 222 due to the fixed position of the supporting bar 222. At the same time, the front end of the second pedal 21 has been mounted on the inclined support table 51, and the drive gear 123 and the fixed stopper 131 are fixed. The front and the back of the telescopic overpass 2 are communicated through the overpass, and personnel can pass through the overpass.

When large equipment passes through the telescopic overpass 2 which needs to be removed temporarily, the motor 122 is reversed, the lower end of the support bar 222 is moved backward, the cross bar 221 at the upper end of the support bar 222 is lowered to be close to the support beam 213 under the action of gravity, and the guard rail 22 is returned to the folded state. The telescopic overpass 2 is retracted into the receiving space as the motor 122 continues to rotate.

The front in each of the above embodiments means the extending direction of the telescopic overpass, which coincides with the longitudinal direction of the guide rail, and also coincides with the longitudinal direction. The transverse direction in each of the above embodiments is perpendicular to the length direction of the guide rail and coincides with the beam direction.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The telescopic platform comprises a first fixed platform and a telescopic overpass which is arranged in a sliding way relative to the first fixed platform, and is characterized in that the first fixed platform comprises a first pedal and a driving component positioned below the first pedal, a storage space is arranged between the first pedal and the driving component, and the telescopic overpass has a retracted state positioned in the storage space and an extended state extending out of the storage space;

2. The telescopic platform according to claim 1, wherein the first fixed platform further comprises two guide rails laid side by side, the storage space is between the two guide rails, the two sides of the second pedal are provided with travelling wheels, and each travelling wheel moves along the guide rail on the corresponding side;

3. The telescoping platform of claim 2, wherein said rail has a C-shaped cross-section and said travelling wheel is inside the C-shape.

4. The telescopic platform according to claim 2, wherein the travelling wheel is mounted at the rear side of the second pedal in the extension direction of the telescopic overpass, and the riding wheel is at the front side of the receiving space.

5. The telescoping platform of claim 2, wherein the drive assembly comprises:

A base positioned below the first pedal;

a motor mounted on the base;

a drive gear coupled to the motor;

A pair of top wheels mounted on the base;

6. The telescoping platform of claim 5, wherein the second pedal comprises:

Two side-by-side support beams;

A plurality of cross beams connected between the two support beams;

A bedplate laid on the support beam and the plurality of cross beams;

7. The telescoping platform of claim 6, wherein the rail guard comprises a cross bar and a plurality of support bars hinged between the cross bar and the second tread; the transmission mechanism is connected with at least one supporting rod; the supporting rods on the same side of the second pedal are respectively hinged on the supporting beams on the same side.

8. The telescoping platform of claim 7, wherein in the guard rail in the collapsed position, the support bar and the cross bar are each proximate to a respective side support beam.

9. The telescoping platform of claim 7, wherein the transmission comprises:

the first transmission piece is fixed with one of the support rods;

A second transmission member hinged to the first transmission member;

10. The telescoping platform of claim 1, further comprising a second stationary stage, wherein the telescoping overpass is docked between the first stationary stage and the second stationary stage in the extended state; and an inclined plane supporting table for guiding the telescopic overpass to be put in place is arranged on one side of the second fixed table, which faces the first fixed table.