1. The utility model provides an electric power cat ladder safety locking structure that falls which characterized in that: comprises a ladder stand body (1) and a ladder stand support (2); the ladder stand support seats (2) are arranged at the two ends of the ladder stand body (1); the ladder stand support (2) comprises a first support plate (3), a second support plate (4) and a connecting block (5); the two end faces of the ladder stand support (2) are fixedly connected with connecting blocks (5); the side surface of the connecting block (5) close to one side of the connecting block (5) is hinged with a first support plate (3); the surface of the connecting block (5) is hinged with a second support plate (4) at the position close to the side face of the other side of the connecting block (5).

2. The electric ladder safety locking structure as claimed in claim 1, wherein: the end surface of one side of the first support plate (3) far away from the corresponding connecting block (5) is hinged with a first pressing plate (6); the end surfaces of one sides of the second support plates (4) far away from the corresponding connecting blocks (5) are hinged with second pressing plates (7); the first pressing plate (6) and the corresponding second pressing plate (7) are hinged with each other; the surface of the second support plate (4) is provided with a groove.

3. The electric ladder safety locking structure as claimed in claim 2, wherein: side surfaces of the second pressing plates (7) departing from the corresponding second support plates (4) are provided with uniformly arranged limiting grooves; the inside of spacing groove all is equipped with spacing tooth (8) of evenly arranging.

4. The electric ladder safety locking structure as claimed in claim 3, wherein: first sliding grooves are formed in the positions, close to the limiting teeth (8), in the second support plate (4); the inner parts of the first sliding grooves are respectively connected with a first sliding plate (9) in a sliding manner, and the limiting teeth (8) are respectively fixedly connected with the corresponding first sliding plates (9); first springs (10) which are uniformly arranged are fixedly connected between the first sliding plate (9) and the groove bottom corresponding to the first sliding groove; the bottoms of the first sliding grooves are provided with vent holes (12); the surface of the limiting plate is fixedly connected with a telescopic rod (11), and the inside of the telescopic rod (11) is communicated with the corresponding vent holes (12) through pipelines.

5. The electric ladder safety locking structure as claimed in claim 4, wherein: the surfaces of the first support plate (3) and the second support plate (4) are fixedly connected with first through blocks (13); the surfaces of the first pressing plate (6) and the second pressing plate (7) are fixedly connected with second through blocks (14); and air guide holes (15) are formed in the side faces of the opposite sides of the first through block (13) and the corresponding second through block (14).

6. The electric ladder safety locking structure as claimed in claim 5, wherein: the limiting teeth (8) are all made of elastic metal materials; the bottom of the limiting teeth (8) is of a conical structural design, the bottom of the limiting teeth (8) is of a bending structural design at the conical structural position, and the bottom orientation of the limiting teeth (8) and the orientation of the corresponding end face of the ladder stand body (1) are acute angles.

7. The electric ladder safety locking structure as claimed in claim 6, wherein: moving grooves are formed in the positions, close to the tooth tips of the limiting teeth (8), of the bottom surface of the second pressing plate (7); moving blocks (16) are connected inside the moving grooves in a sliding manner; a second spring (17) is fixedly connected between the moving block (16) and the bottom of the corresponding moving groove; the surfaces of the moving blocks (16) are fixedly connected with elastic plates (18); elastic pieces (19) are fixedly connected between the elastic plates (18) and the surfaces of the corresponding limiting teeth (8).

8. The electric ladder safety locking structure as claimed in claim 7, wherein: the side face positions of the second pressing plate (7) corresponding to one side of the second support plate (4) are provided with telescopic holes which are uniformly distributed, and two telescopic holes are a group and are uniformly distributed; the telescopic holes are all designed in an arc structure, and the opening directions of the same group of telescopic holes are all designed in a back direction; the telescopic plates (20) are connected inside the telescopic holes in a sliding manner; a second sliding groove is formed in the position, close to the telescopic plate (20), inside the second pressing plate (7), and the second sliding groove is communicated with the vent hole (12); a second sliding plate (21) is connected to the inner part of the second sliding groove in a sliding manner, and the telescopic plates (20) are fixedly connected with the second sliding plate (21); and third springs (22) which are uniformly arranged are fixedly connected between the second sliding plate (21) and the bottom of the second sliding groove.

9. The electric ladder safety locking structure as claimed in claim 8, wherein: the surface of the expansion plate (20) is provided with evenly distributed grooves (23) close to the top of the expansion link (11); the grooves (23) are designed into V-shaped structures.

10. The electric ladder safety locking structure as claimed in claim 9, wherein: guide grooves (24) are formed in the inner side surfaces of the grooves (23); mounting grooves are formed in the bottoms of the grooves (23); the interior of each mounting groove is fixedly connected with an elastic bag (25).

Background

The electric power cat ladder carries out electric power maintenance's special cat ladder as the electrician, does benefit to the electric power staff and climbs to the assigned position, carries out the circuit maintenance, because the height drop is great between the staff of standing at electric power cat ladder top position and ground to the service environment difference of electric power cat ladder is also great, and this has also provided higher requirement to the security of electric power cat ladder.

According to CN210134796U, when the electric crawling ladder with the automatic locking structure is used, the automatic locking mechanism is hooked on a wire, self-locking is realized through a locking piece on the hook, the wire is arranged in a closed space at the upper part of the hook, and therefore the electric crawling ladder is firmly hung on the wire to be overhauled; when the automatic locking mechanism is screwed out of the top of the rotating part, the rest ladder stand and the rotating part combination part can be used as a common ladder stand, and the practicability is improved.

However, in the prior art, when the electric crawling ladder needs to be used, the electric crawling ladder is simply put on the wall surface, so that a triangular stable structure is formed among the electric crawling ladder, the ground and the wall surface, but the wall surface and the ground are greatly changed, and the cement ground and the ground are completely different, so that the electric crawling ladder is easy to sideslip when in use, and the safety problem of electricians is influenced.

Therefore, the invention provides a safety locking structure of an electric crawling ladder.

Disclosure of Invention

In order to make up for the problem that in the prior art, when the electric crawling ladder needs to be used, the electric crawling ladder is simply put on a wall surface, so that a triangular stable structure is formed among the electric crawling ladder, the ground and the wall surface, but the electric crawling ladder is easy to sideslip when being used due to large changes of the wall surface and the ground, such as completely different conditions of cement ground and ground, and the problem of electrician safety is influenced, the invention provides the safety locking structure of the electric crawling ladder.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a safe locking structure of an electric crawling ladder, which comprises a crawling ladder body and a crawling ladder support; the ladder stand support is arranged at the two ends of the ladder stand body; the ladder stand support comprises a first support plate, a second support plate and a connecting block; the two end surfaces of the crawling ladder support are fixedly connected with connecting blocks; the side surface of the connecting block, which is close to the connecting block, is hinged with a first support plate; the surface of the connecting block is hinged with a second support plate at the position close to the side surface of the other side of the connecting block; when the electric power ladder stand is in work, the electric power ladder stand is taken as a special ladder stand for electrician to carry out electric power maintenance, which is convenient for the electric power working personnel to climb to a designated position for circuit maintenance, and because the height difference between the working personnel standing at the top of the electric power ladder stand and the ground is large and the difference of the using environment of the electric power ladder stand is also large, higher requirements are provided for the safety of the electric power ladder stand. The ladder stand supports at the two ends of the electric power ladder stand are respectively arranged on the wall and the ground, so that the ladder stand is fixed at a specified angle position, when an electrician climbs the electric power ladder stand, due to the ladder stand support structures at the two ends of the electric power ladder stand, the contact position of the electric power ladder stand and the wall or the ground is a triangular stable supporting structure, the ground and the wall can be firmly locked respectively through the structure, and the electric power ladder stand is prevented from sliding.

Preferably, the end face of one side of the first supporting plate, which is far away from the corresponding connecting block, is hinged with a first pressing plate; the end surfaces of the second support plates, which are far away from the corresponding connecting blocks, are hinged with second pressing plates; the first pressing plate and the corresponding second pressing plate are hinged with each other; the surface of the second support plate is provided with a groove; during operation, through setting up first clamp plate and second clamp plate, when first extension board and second extension board received pressure, all can rotate, first extension board and second extension board can drive and correspond first clamp plate and second clamp plate and rotate, make first clamp plate and second clamp plate be located same horizontal plane position, and then first clamp plate and second clamp plate can contact ground or wall completely this moment, because the bottom surface of first clamp plate and second clamp plate all carries out the matte design, can increase the coefficient of friction of electric power cat ladder and ground or wall, reduce the landing risk of electric power cat ladder.

Preferably, the side surface of the second pressing plate, which is far away from the corresponding second support plate, is provided with uniformly arranged limiting grooves; limiting teeth which are uniformly arranged are arranged in the limiting grooves; during operation, through setting up spacing tooth, when the laminating of second clamp plate is on ground or wall, the spacing tooth that second clamp plate surface evenly arranged can directly pierce ground or wall, increases the spacing effect of second clamp plate on ground or wall.

Preferably, the positions, close to the limiting teeth, inside the second support plate are provided with first sliding chutes; the inner parts of the first sliding chutes are respectively connected with a first sliding plate in a sliding manner, and the limiting teeth are respectively fixedly connected with the corresponding first sliding plates; first springs which are uniformly arranged are fixedly connected between the first sliding plate and the groove bottom corresponding to the first sliding groove; the bottoms of the first sliding grooves are provided with vent holes; the surfaces of the limiting plates are fixedly connected with telescopic rods, and the interiors of the telescopic rods are communicated with the corresponding vent holes through pipelines; during operation, through setting up the telescopic link, when first extension board and corresponding second extension board rotate the expansion completely, first clamp plate and second clamp plate can extrude the telescopic link this moment, make the inside of the leading-in first spout of the inside gas of telescopic link, and then the inside first slide of first spout slides, first slide can promote spacing tooth and all slide, and ejecting spacing groove, spacing tooth just can be ejecting spacing this moment, in daily handling, spacing tooth income corresponds the spacing groove in can being automatic, spacing tooth fish tail transport personnel have been avoided.

Preferably, the surfaces of the first support plate and the second support plate are fixedly connected with first through blocks; the surfaces of the first pressing plate and the second pressing plate are fixedly connected with second through blocks; the side surfaces of the opposite sides of the first through block and the corresponding second through block are provided with air guide holes; the during operation, through setting up first logical piece and second logical piece, only when the normal rising of electric power cat ladder, make the cat ladder support receive fixed extrusion, first logical piece and the second of corresponding expert can contact each other this moment, not only can play the limiting displacement to first extension board and second extension board, the gas guide hole switches on completely this moment simultaneously, the telescopic link receives the extrusion this moment, its inside gas just can be through the inside of the normal leading-in first spout of gas guide hole, the normal ejecting of first slide and spacing tooth has been guaranteed, at the in-process of transport like this, just can not be because of touching the extrusion telescopic link, make the direct ejecting of spacing tooth, and fish tail transport personnel.

Preferably, the limiting teeth are all designed by elastic metal materials; the bottom of the limiting tooth is in a conical structural design, the bottom of the limiting tooth is in a bent structural design at the conical structural position, and the direction of the bottom of the limiting tooth and the direction of the corresponding end surface of the ladder stand body are acute angles; the during operation, through the structural design who bends spacing tooth, make spacing tooth top go out when corresponding spacing groove, the side of spacing tooth can extrude wall or ground, and the sharp tooth part of spacing tooth can not directly pierce wall or ground, and then avoided spacing tooth directly to produce the damage to wall or ground, when the electric power cat ladder has appeared sliding, spacing tooth can receive gliding effect and produce the deformation this moment, and then make the prong position of spacing tooth towards wall or ground, thereby just carry out further urgent spacing this moment, guarantee electrician's safety.

Preferably, the bottom surface of the second pressure plate is provided with moving grooves at positions close to the tooth tips of the limiting teeth; moving blocks are connected to the inner parts of the moving grooves in a sliding mode; second springs are fixedly connected between the moving blocks and the bottoms of the corresponding moving grooves; elastic plates are fixedly connected to the surfaces of the moving blocks; elastic pieces are fixedly connected between the elastic plates and the surfaces of the corresponding limiting teeth; during operation, through setting up the movable block, when the electric power cat ladder has appeared sliding, can relative slip between movable block and the cat ladder support, relative motion between movable block and the spacing tooth this moment, and then the movable block can automatic roof pressure limit teeth's prong, promotes limit teeth's prong to pierce wall and bottom surface.

Preferably, the side face of the second pressing plate corresponding to one side of the second support plate is provided with uniformly arranged telescopic holes, and two telescopic holes are in a group and are uniformly distributed; the telescopic holes are all designed in an arc structure, and the opening directions of the same group of telescopic holes are all designed in a back direction; the telescopic plates are connected inside the telescopic holes in a sliding manner; a second sliding groove is formed in the position, close to the telescopic plate, inside the second pressing plate, and the second sliding groove is communicated with the vent hole; a second sliding plate is connected inside the second sliding chute in a sliding manner, and the telescopic plates are fixedly connected with the second sliding plate; third springs which are uniformly arranged are fixedly connected between the second sliding plate and the bottom of the second sliding groove; the during operation, through setting up the expansion plate, when the telescopic link received the extrusion, the inside of leading-in second spout in step can be passed through to the inside gas of telescopic link, make the inside second slide motion of second spout, the second slide can drive the expansion plate motion of its surperficial evenly arranged, make the ejecting telescopic hole of telescopic link, the expansion plate forms even protruding structure on the surface of second clamp plate, before the electrician climbs the electric power cat ladder, the foot can step on the surface at the second clamp plate at first, if the sole is stained with earth, can strike off through even expansion plate, the electric power cat ladder accomplishes the back of using simultaneously, the expansion plate can automatic interior income correspond the telescopic hole, make the surface of second clamp plate this moment smooth, be convenient for the clearance to second clamp plate surface earth.

Preferably, the surface of the telescopic plate is provided with uniformly arranged grooves at positions close to the top of the telescopic rod; the grooves are designed into V-shaped structures; the during operation, offer the slot of evenly arranging through the surface at the expansion plate, when the expansion plate roll-off corresponds the flex hole, the top of expansion plate can automatic bending because slot and self elastic effect, make the expansion plate more at the top occupation space of second clamp plate, the foot is stepped on the back, the slot on expansion plate surface can further increase anti-skidding effect, and the "V" shape structural design of slot, accomplish the work back, the expansion plate is automatic to be adducted in and is corresponded the flex hole, the expansion plate is under the effect in flex hole this moment, automatic deformation, two opposite flank extrusions of while slot inside are in the same place, make a large amount of earth of slot inside extrude automatically.

Preferably, the inner side surfaces of the grooves are provided with guide grooves; mounting grooves are formed in the bottoms of the grooves; the inner parts of the mounting grooves are fixedly connected with elastic bags; the during operation, through the elasticity bag, through with the inside of elasticity bag as for the mounting groove of slot bottom, when taking in the inside that corresponds the flexible hole in the expansion plate, the inside of slot draws in, the side of slot can extrude the elasticity bag automatically this moment, make the elasticity bag warp, the elasticity bag of deformation state is before corresponding the slot is complete income flexible hole, can promote to extrude the little stone block of slot inside, avoid the inside of the little stone block card income slot of stereoplasm, influence the inside normal slip in corresponding flexible hole of expansion plate.

The invention has the advantages that:

1. the ladder stand is provided with the ladder stand body and the ladder stand support; through the articulated first extension board of surface and the second extension board of cat ladder base, the effectual both ends that have realized the electric power cat ladder correspond the locking, through stable triangular structure, have reduced the gliding risk of electric power cat ladder by a wide margin for the stability of electric power cat ladder is higher, guarantees the security of electrician at the higher position during operation.

2. According to the invention, through the arrangement of the limiting teeth, the moving block and the elastic plate, and through the structural design of bending the limiting teeth, when the limiting tooth tops out of the corresponding limiting grooves, the side surfaces of the limiting teeth can extrude the wall surface or the ground, and the sharp teeth of the limiting teeth cannot directly penetrate into the wall surface or the ground, so that the limiting teeth are prevented from directly damaging the wall surface or the ground.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a cross-sectional view of a ladder stand of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic view of the construction of the first and second slide plates of the present invention;

FIG. 6 is a schematic structural view of the expansion plate of the present invention;

FIG. 7 is a schematic diagram of the construction of the elastomeric bladder of the present invention.

In the figure: the ladder stand comprises a ladder stand body 1, a ladder stand support 2, a first support plate 3, a second support plate 4, a connecting block 5, a first pressing plate 6, a second pressing plate 7, limiting teeth 8, a first sliding plate 9, a first spring 10, an expansion rod 11, an air vent 12, a first through block 13, a second through block 14, an air guide hole 15, a moving block 16, a second spring 17, an elastic plate 18, an elastic sheet 19, an expansion plate 20, a second sliding plate 21, a third spring 22, a groove 23, a guide groove 24 and an elastic bag 25.

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. 1-6, a safety locking structure for an electric ladder stand comprises a ladder stand body 1 and a ladder stand support 2; the ladder stand support seats 2 are arranged at the two ends of the ladder stand body 1; the ladder stand support 2 comprises a first support plate 3, a second support plate 4 and a connecting block 5; the two end surfaces of the ladder stand support 2 are fixedly connected with connecting blocks 5; the side surface of the connecting block 5, which is close to the connecting block 5, is hinged with a first supporting plate 3; the surface of the connecting block 5 is hinged with a second support plate 4 at the position close to the side surface of the other side of the connecting block 5; when the electric power ladder stand is in work, the electric power ladder stand is taken as a special ladder stand for electrician to carry out electric power maintenance, which is convenient for the electric power working personnel to climb to a designated position for circuit maintenance, and because the height difference between the working personnel standing at the top of the electric power ladder stand and the ground is large and the difference of the using environment of the electric power ladder stand is also large, higher requirements are provided for the safety of the electric power ladder stand. The ladder stand supports 2 at the two ends of the electric power ladder stand are respectively arranged on the wall and the ground, so that the ladder stand is fixed at a specified angle position, when an electrician climbs the electric power ladder stand, the ladder stand supports 2 at the two ends of the electric power ladder stand are in structures, the contact position of the electric power ladder stand and the wall or the ground is a triangular stable supporting structure, the ground and the wall can be firmly locked respectively through the structures, and the electric power ladder stand is prevented from sliding.

The end surfaces of the first supporting plates 3, which are far away from the corresponding connecting blocks 5, are hinged with first pressing plates 6; the end surfaces of the second support plates 4, which are far away from the corresponding connecting blocks 5, are hinged with second pressing plates 7; the first pressing plate 6 and the corresponding second pressing plate 7 are hinged with each other; the surface of the second support plate 4 is provided with a groove; during operation, through setting up first clamp plate 6 and second clamp plate 7, when first extension board 3 and second extension board 4 received pressure, all can rotate, first extension board 3 and second extension board 4 can drive and correspond first clamp plate 6 and second clamp plate 7 and rotate, make first clamp plate 6 and second clamp plate 7 be located same horizontal plane position, and then first clamp plate 6 and second clamp plate 7 can contact ground or wall completely this moment, because the bottom surface of first clamp plate 6 and second clamp plate 7 all carries out the matte design, can increase the coefficient of friction of electric power cat ladder and ground or wall, reduce the landing risk of electric power cat ladder.

The side surface of the second pressing plate 7, which is far away from the corresponding second support plate 4, is provided with evenly-arranged limiting grooves; limiting teeth 8 which are uniformly arranged are arranged in the limiting grooves; during operation, through setting up spacing tooth 8, when the laminating of second clamp plate 7 on ground or wall, the spacing tooth 8 that 7 surfaces of second clamp plate were evenly arranged can directly pierce ground or wall, increases the spacing effect of second clamp plate 7 on ground or wall.

First sliding grooves are formed in the positions, close to the limiting teeth 8, in the second support plate 4; the first sliding grooves are connected with first sliding plates 9 in a sliding mode, and the limiting teeth 8 are fixedly connected with the corresponding first sliding plates 9; first springs 10 which are uniformly arranged are fixedly connected between the first sliding plate 9 and the groove bottom corresponding to the first sliding groove; the bottom of each first sliding chute is provided with a vent hole 12; the surfaces of the limiting plates are fixedly connected with telescopic rods 11, and the interiors of the telescopic rods 11 are communicated with the corresponding vent holes 12 through pipelines; during operation, through setting up telescopic link 11, when first extension board 3 and corresponding second extension board 4 rotate the expansion completely, first clamp plate 6 and second clamp plate 7 can extrude telescopic link 11 this moment, make the inside of the leading-in first spout of the gaseous inside of telescopic link 11, and then the inside first slide 9 of first spout slides, first slide 9 can promote spacing tooth 8 and all slide, and ejecting spacing groove, spacing tooth 8 just can be ejecting spacing this moment, in daily handling, income corresponds the spacing groove in spacing tooth 8 can be automatic, 8 fish tail carriers of spacing tooth have been avoided.

The surfaces of the first support plate 3 and the second support plate 4 are fixedly connected with a first through block 13; the surfaces of the first pressing plate 6 and the second pressing plate 7 are fixedly connected with a second through block 14; the side surfaces of the opposite sides of the first through block 13 and the corresponding second through block 14 are both provided with air guide holes 15; during operation, through setting up first logical piece 13 and second logical piece 14, only when the normal rising of electric power cat ladder, make cat ladder support 2 receive fixed extrusion, first logical piece 13 and the second of corresponding logical piece 14 can contact each other this moment, not only can play the limiting displacement to first extension board 3 and second extension board 4, air guide hole 15 switches on completely this moment simultaneously, telescopic link 11 receives the extrusion this moment, its inside gas just can be through the inside of air guide hole 15 normal leading-in first spout, the normal ejecting of first slide 9 and spacing tooth 8 has been guaranteed, at the in-process of transport like this, just can not be because of touching extrusion telescopic link 11, make the ejecting of spacing tooth 8 directness, and fish tail porter.

The limiting teeth 8 are all made of elastic metal materials; the bottom of the limiting tooth 8 is designed to be a conical structure, the bottom of the limiting tooth 8 is designed to be a bent structure at the position of the conical structure, and the orientation of the bottom of the limiting tooth 8 and the orientation of the corresponding end surface of the ladder stand body 1 are acute angles; the during operation, through the structural design who bends spacing tooth 8, make spacing tooth 8 when ejecting corresponding spacing groove, spacing tooth 8's side can extrude wall or ground, and spacing tooth 8's sharp tooth part can not directly pierce wall or ground, and then avoided spacing tooth 8 directly to produce the damage to wall or ground, when the electric power cat ladder has appeared sliding, spacing tooth 8 can receive gliding effect and produce and warp this moment, and then make spacing tooth 8's prong position towards wall or ground, thereby just carry out further urgent spacing this moment, guarantee electrician's safety.

Moving grooves are formed in the positions, close to the tooth tips of the limiting teeth 8, of the bottom surface of the second pressing plate 7; the moving blocks 16 are connected to the inner parts of the moving grooves in a sliding manner; a second spring 17 is fixedly connected between the moving block 16 and the bottom of the corresponding moving groove; the surfaces of the moving blocks 16 are fixedly connected with elastic plates 18; elastic sheets 19 are fixedly connected between the elastic plates 18 and the surfaces of the corresponding limiting teeth 8; during operation, through setting up movable block 16, when the electric power cat ladder has appeared sliding, can relative sliding between movable block 16 and the cat ladder support 2, relative motion between movable block 16 and the spacing tooth 8 this moment, and then movable block 16 can automatic roof pressure limit tooth 8's prong, promotes limit tooth 8's prong to pierce wall and bottom surface.

The side face positions of the second pressing plate 7, corresponding to one side of the second support plate 4, are provided with telescopic holes which are uniformly distributed, and two telescopic holes are a group and are uniformly distributed; the telescopic holes are all designed in an arc structure, and the opening directions of the same group of telescopic holes are all designed in a back direction; the telescopic plates 20 are connected inside the telescopic holes in a sliding manner; a second sliding chute is formed in the second pressure plate 7 at a position close to the expansion plate 20, and the second sliding chute is communicated with the vent hole 12; a second sliding plate 21 is connected inside the second sliding chute in a sliding manner, and the telescopic plates 20 are fixedly connected with the second sliding plate 21; third springs 22 which are uniformly arranged are fixedly connected between the second sliding plate 21 and the bottom of the second sliding chute; the during operation, through setting up expansion plate 20, when telescopic link 11 receives the extrusion, the inside of leading-in second spout in step can be passed through to the inside gas of telescopic link 11, make the inside second slide 21 motion of second spout, second slide 21 can drive the expansion plate 20 motion that its surface evenly arranged, make the ejecting telescopic hole of telescopic link 11, expansion plate 20 forms even protruding structure on the surface of second clamp plate 7, electrician climbs the electric power cat ladder before, the foot can at first step on the surface of second clamp plate 7, if the sole is stained with when earth, can strike off through even expansion plate 20, electric power cat ladder accomplishes the use back simultaneously, expansion plate 20 can automatic interior income correspond the telescopic hole, make the surface of second clamp plate 7 smooth this moment, be convenient for to the clearance of second clamp plate 7 surface earth.

The surface of the expansion plate 20 close to the top of the expansion link 11 is provided with uniformly arranged grooves 23; the grooves 23 are all designed into V-shaped structures; the during operation, offer the slot 23 of evenly arranging through the surface at expansion plate 20, when expansion plate 20 roll-off corresponds the flex hole, expansion plate 20's top is because slot 23 and self elastic effect can automatic bending, make expansion plate 20 more at the top occupation space of second clamp plate 7, the foot steps on the back, slot 23 on expansion plate 20 surface can further increase anti-skidding effect, and the "V" shape structural design of slot 23, accomplish the work back, expansion plate 20 is automatic to be taken in and corresponds the flex hole in, expansion plate 20 is under the effect in flex hole this moment, automatic deformation, two opposite flank extrusion inside slot 23 are in the same place simultaneously, make the automatic extrusion of a large amount of earth of slot 23 insides.

Example two

Referring to fig. 7, the inner side surfaces of the grooves 23 are both provided with guide grooves 24; mounting grooves are formed in the bottoms of the grooves 23; the elastic bags 25 are fixedly connected inside the mounting grooves; the during operation, through elasticity bag 25, through the inside with elasticity bag 25 as for the mounting groove of slot 23 bottom, when the expansion plate 20 adduction corresponds the inside in flexible hole, the inside of slot 23 draws in, the side of slot 23 can extrude elasticity bag 25 automatically this moment, make elasticity bag 25 warp, the elasticity bag 25 of deformation state is before corresponding the slot 23 is complete income flexible hole, can promote to extrude the inside little stone block of slot 23, avoid the inside of the little stone block card income slot 23 of stereoplasm, the inside that influences expansion plate 20 at corresponding flexible hole normally slides.

According to the working principle, when the electric crawling ladder is required to be used, the crawling ladder supports 2 at the two ends of the electric crawling ladder are respectively arranged on a wall surface and the ground, so that the crawling ladder is fixed at a specified angle position, when an electrician climbs the electric crawling ladder, due to the crawling ladder support 2 structures at the two ends of the electric crawling ladder, the contact positions of the electric crawling ladder and the wall surface or the ground are both triangular stable supporting structures, the ground and the wall surface can be respectively and firmly locked through the structures, and the electric crawling ladder is prevented from sliding; by arranging the first pressing plate 6 and the second pressing plate 7, when the first supporting plate 3 and the second supporting plate 4 are stressed, the first supporting plate 3 and the second supporting plate 4 can drive the corresponding first pressing plate 6 and the corresponding second pressing plate 7 to rotate, so that the first pressing plate 6 and the second pressing plate 7 are positioned at the same horizontal plane, and further the first pressing plate 6 and the second pressing plate 7 can be completely contacted with the ground or the wall surface; by arranging the limiting teeth 8, when the second pressing plate 7 is attached to the ground or the wall surface, the limiting teeth 8 uniformly arranged on the surface of the second pressing plate 7 can directly penetrate into the ground or the wall surface, so that the limiting effect of the second pressing plate 7 on the ground or the wall surface is improved; by arranging the telescopic rod 11, when the first support plate 3 and the corresponding second support plate 4 are completely rotated and unfolded, the first pressing plate 6 and the second pressing plate 7 can extrude the telescopic rod 11, so that gas in the telescopic rod 11 is guided into the first sliding groove, the first sliding plate 9 in the first sliding groove slides, the first sliding plate 9 can push the limiting teeth 8 to slide uniformly and push the limiting grooves out, the limiting teeth 8 can push the limiting grooves out for limiting, and the limiting teeth 8 can automatically retract into the corresponding limiting grooves in the daily carrying process, so that the situation that the limiting teeth 8 scratch a carrying person is avoided; by arranging the first through block 13 and the second through block 14, only when the electric ladder stand normally stands, the ladder stand support 2 is fixedly extruded, at the moment, the first through block 13 and the corresponding second through block 14 can be contacted with each other, not only can the limiting effect on the first support plate 3 and the second support plate 4 be achieved, at the moment, the air guide hole 15 is completely communicated, the telescopic rod 11 is extruded at the moment, the air in the telescopic rod can be normally guided into the first chute through the air guide hole 15, and the normal ejection of the first sliding plate 9 and the limiting teeth 8 is ensured, so that the telescopic rod 11 cannot be extruded due to touch in the conveying process, the limiting teeth 8 are directly ejected, and the conveying personnel are scratched; through the structural design of bending the limiting teeth 8, when the limiting teeth 8 are ejected out of the corresponding limiting grooves, the side faces of the limiting teeth 8 can extrude the wall or the ground, the sharp tooth parts of the limiting teeth 8 cannot directly penetrate into the wall or the ground, and further the limiting teeth 8 are prevented from directly damaging the wall or the ground; by arranging the moving block 16, when the electric crawling ladder slides, the moving block 16 and the crawling ladder support 2 can slide relatively, at the moment, the moving block 16 and the limiting teeth 8 can move relatively, and then the moving block 16 can automatically press the tooth tops of the limiting teeth 8 to promote the tooth tops of the limiting teeth 8 to penetrate into the wall surface and the bottom surface; by arranging the expansion plate 20, when the expansion link 11 is extruded, gas inside the expansion link 11 can be synchronously guided into the second chute through a pipeline, so that the second sliding plate 21 inside the second chute moves, the second sliding plate 21 can drive the expansion plate 20 uniformly distributed on the surface of the expansion link 11 to move, the expansion link 11 can eject out expansion holes, the expansion plate 20 forms a uniform protruding structure on the surface of the second pressing plate 7, an electrician can step on the surface of the second pressing plate 7 firstly before climbing the electric crawling ladder, if the sole is stuck with soil, the uniform expansion plate 20 can be used for scraping off, and after the electric crawling ladder is used, the expansion plate 20 can automatically retract into the corresponding expansion holes, so that the surface of the second pressing plate 7 is smooth at the moment, and the cleaning of the soil on the surface of the second pressing plate 7 is facilitated; through the grooves 23 uniformly arranged on the surface of the expansion plate 20, when the expansion plate 20 slides out of the corresponding expansion hole, the top of the expansion plate 20 can be automatically bent due to the effect of the grooves 23 and the elasticity of the expansion plate, so that the expansion plate 20 occupies more space at the top of the second pressing plate 7, after the foot is stepped on, the grooves 23 on the surface of the expansion plate 20 can further increase the anti-skidding effect, and due to the V-shaped structural design of the grooves 23, after the work is finished, the expansion plate 20 automatically retracts to correspond to the corresponding expansion hole, at the moment, the expansion plate 20 automatically deforms under the effect of the expansion hole, and meanwhile, two opposite side surfaces inside the grooves 23 are extruded together, so that a large amount of soil inside the grooves 23 is automatically extruded; through elasticity bag 25, through the inside with elasticity bag 25 as for the mounting groove of slot 23 bottom, when the expansion plate 20 adduction corresponds the inside in flexible hole, the inside of slot 23 draws in, the side of slot 23 can extrude elasticity bag 25 automatically this moment, make elasticity bag 25 warp, the elasticity bag 25 of deformation state is before corresponding the slot 23 is complete income flexible hole, can promote to extrude the inside little stone block of slot 23, avoid the inside of the little stone block card income slot 23 of stereoplasm, the inside normal slip that corresponds flexible hole of expansion plate 20 is influenced.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.