CN112523674B - Outdoor electric power overhaul ladder with bottom height - Google Patents

Abstract

The invention belongs to the technical field of electric power overhaul ladders, and discloses an outdoor bottom-height electric power overhaul ladder which comprises two support columns, wherein the two support columns are aligned and flush, an upper leaning frame is fixedly arranged at the top of each support column, a support plate is fixedly arranged at the inner side of each support column, a support rod is fixedly arranged at the top of each support plate, and bolts are fixedly arranged at the inner side of each support plate. According to the invention, the supporting rod is improved to be designed into the trapezoid table with the inclined surface, the inclined surface compensates the inclined angle of the ladder in the inclined process of the supporting rod, and the falling foot surface of the supporting rod is leveled in a proper amount, so that the contact surface between the sole of a worker and the supporting rod is enlarged, and the friction coefficient can be increased at the same time by the upper anti-slip strip and the inclined surface anti-slip strip, so that the foot slip effect of the worker is avoided, the standing stability of the worker is improved, and the foot slip potential safety hazard caused by small contact area of the worker is eliminated.

Description

Outdoor electric power overhaul ladder with bottom height

Technical Field

The invention belongs to the technical field of electric power overhaul ladders, and particularly relates to an outdoor bottom-height electric power overhaul ladder.

Background

The ladder is daily life apparatus, is to make the limit with two long thick poles, and the middle cross is fit for climbing the horizontal pole, is used for climbing, and the ladder divide into lift list ladder and lift double ladder, divide into multiple type from material and style and usage, divide from the material: aluminum alloy, stainless steel, glass fiber reinforced plastic, iron, bamboo, wood, etc., are classified from the aspect of style: straight ladders, double ladders, telescopic ladders, dual-purpose ladders, single-side ladders, double-side ladders, multifunctional ladders, car washing tables, goods shelves ladders and the like, from the insulating property: uninsulated, semi-insulated, fully insulated, and rated for use: home ladders, engineering ladders, dual-purpose ladders, dry ladders, car washing tables and shelf ladders.

The existing electric power maintenance ladder has a certain part to be improved, the supporting rod part of the existing electric power ladder is in a horizontal state, but in various processes of actual use, the ladder is obviously not placed vertically, but is inclined due to leaning and climbing convenience, so that the plane of the horizontal supporting rod is inclined originally in the vertical placing state of the ladder, the inclined edge of the supporting rod is contacted with soles of workers, the contact area with the soles of the workers is reduced, friction force is reduced, and potential safety hazards exist.

And when present ladder is put in the slope, its stabilizer blade also can take place the slope, then the area of contact between stabilizer blade and the ground just reduces by a wide margin, causes to produce easily with the ground between the slip, probably leads to danger, and the operational environment of electric power maintenance ladder is various, and its coefficient of friction is also different on various different ground, causes the situation that stability is different, consequently needs to improve it.

Disclosure of Invention

The invention aims to provide an outdoor bottom-height electric power overhaul ladder so as to solve the problems in the background technology.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides an outdoor high electric power maintenance ladder of end, includes the support column, the support column is provided with two and to flush the line, two the top fixed mounting of support column has the frame of leaning on, two the inboard fixed mounting of support column has the backup pad, the top fixed mounting of backup pad has the bracing piece, the inboard fixed mounting of backup pad has the bolt, the backup pad passes through bolt fixed mounting on the support column, the top fixed mounting of bracing piece has the antislip strip, the inclined plane fixed mounting of support column has the inclined plane antislip strip.

Preferably, two the bottom of support column is equal fixed mounting has the riding block, the below of riding block is provided with the base, the bottom fixed mounting of riding block has the turning block, the inboard movable joint of base has the movable plate, the top fixed mounting of base has the top cap, two bar grooves have been seted up on the surface of top cap, the top fixed mounting of movable plate has two fixed blocks, two the fixed block corresponds respectively and passes the bar groove and extend to the top of top cap and with turning block swing joint.

Preferably, the inside fixed mounting of base has the parting bead, the parting bead divides into two parts around with the inner chamber of base, the ball groove has been seted up to the bottom of base rear portion inner chamber, the inside movable joint in ball groove has the ball, the bottom fixed mounting of base inner chamber has the clamp plate, the spherical logical groove has been seted up to the surface of clamp plate, ball movable joint is in the inboard in ball logical groove, the medial surface fixedly connected with guide pillar of movable plate, the surface activity of guide pillar has cup jointed the spring, the guide pillar passes the parting bead and extends to the front portion inner chamber of base, the ball groove has been seted up to the bottom of movable plate, the ball contacts with the inner wall in ball groove, the both ends of spring respectively with parting bead and movable plate contact, rear fixed cover fixed mounting is in the rear side of base, the through-hole has been seted up to the bottom of base front portion inner chamber, movable mounting has the rotation fixture block in the front portion inner chamber of base, bottom fixed mounting of base has the bottom antislip strip.

Preferably, the rotating fixture block comprises a main shaft, a middle clamping column, a gear and side clamping columns are sleeved on the surface of the main shaft, the two side clamping columns are respectively arranged at two ends of the main shaft, the middle clamping column is provided with one middle part and is positioned at the middle part of the main shaft, the two gears are respectively positioned between the middle clamping column and the side clamping columns, and the main shaft is movably arranged in a front inner cavity of the base.

Preferably, the backup pad is inside hollow triangular prism structure, the bracing piece is isosceles trapezoid structure, rectangular channel has all been seted up to the top of bracing piece and the inclined plane that is located the front portion, go up antislip strip and inclined plane antislip strip and imbed respectively in the rectangular channel of bracing piece top and inclined plane, go up antislip strip and inclined plane antislip strip surface and set up to horizontal strip and all be the rubber block system, when the ladder leaned on other supports of wall body process, the whole time of ladder presents incline condition, conventional falling foot support can produce incline condition this moment, cause the staff to fall the foot unstable, improve the bracing piece here, design it into the trapezoidal platform that possesses the inclined plane, the inclined plane can compensate the angle of inclination of ladder at the slope in-process of bracing piece, the appropriate amount is adapted to the falling foot face of bracing piece, in order to enlarge the contact surface between staff's the sole and the bracing piece, and here go up antislip strip and inclined plane antislip strip can also reach the effect that increases friction coefficient simultaneously, avoid staff's foot to slide.

Preferably, the lateral rectangular groove is formed in the side wall of the inner cavity at the rear part of the base, the front end of the lateral rectangular groove reaches the parting bead, the rear end penetrates through the rear port of the base, the two sides of the moving plate are provided with strip-shaped protrusions, the strip-shaped protrusions are movably clamped into the lateral rectangular groove, the rectangular groove formed in the inner wall of the base is matched with the strip-shaped protrusions of the moving plate, and the two are mainly used for limiting and guiding the moving plate, so that the moving plate is prevented from shifting and deviating in the translation process.

Preferably, two rows of equal quantity are offered to the spherical groove in the bottom of base inner chamber, every row the spherical groove is provided with eight, the quantity and the position of seting up of spherical logical groove on the clamp plate correspond with spherical groove, the inner wall of spherical logical groove is the annular cambered surface that is laminated in the ball surface, the top internal diameter of spherical logical groove is less than the diameter of ball, and spherical logical groove can block the upper portion of ball through such design, and spherical logical groove passes through the screw by fixed mounting in the bottom of base inner chamber, because the top internal diameter of spherical logical groove is less than the diameter of ball, causes the ball unable break away from under the joint of spherical logical groove, and the ball can take place free rotation, and the support of ball has reduced the resistance that receives in the fixed block removes.

Preferably, teeth are formed at bottoms of the ports of the two guide posts, the teeth at the ports of the two guide posts are respectively meshed with the two gears correspondingly, and the gears can rotate due to meshing between the clamping teeth in the process of stretching and translating the guide posts back and forth.

Preferably, the cross section shape size of middle card post and side card post is unanimous, and the length of middle card post is greater than the length of side card post, the surface of middle card post and side card post is provided with the latch, the latch has taken up middle card post and side card post surface one third space, when the ladder leans on the leaning on the thing, the staff begins to climb, the relative rotation takes place between the support block bottom rotating block and the fixed block, the fixed block keeps the angle unchanged, the ladder is whole to exert down force along the inclined plane to the fixed block, downward force of slope can decompose the component along the horizontal direction, cause the movable plate to slide to the inner chamber direction of base, the guide pillar translation to the inner chamber depths, the spring is compressed, the spring can play the reset effect to the fixed block here, the gear that meshes with it can take place to rotate, the main shaft is rotated to the gear, then middle card post and side card post rotate thereupon, under the initial state, the latch on middle card post and side card post surface is upwards, latch can rotate downwards when rotating, and finally form the card with the ground contact, perhaps soft ground, if the latch is in the soil, the place is formed to the latch, can be embedded into the ground in the ground.

The beneficial effects of the invention are as follows:

1. according to the invention, the supporting rod is improved to be designed into the trapezoid table with the inclined surface, the inclined surface compensates the inclined angle of the ladder in the inclined process of the supporting rod, and the falling foot surface of the supporting rod is leveled in a proper amount, so that the contact surface between the sole of a worker and the supporting rod is enlarged, and the friction coefficient can be increased at the same time by the upper anti-slip strip and the inclined surface anti-slip strip, so that the foot slip effect of the worker is avoided, the standing stability of the worker is improved, and the foot slip potential safety hazard caused by small contact area of the worker is eliminated.

2. According to the invention, when the ladder is inclined, the rotating block and the fixed block can relatively rotate, and the rotating angle is increased along with the increase of the leaning inclination angle of the ladder, so that the state of the base is kept unchanged all the time, the base can be horizontally placed on the ground all the time, the maximum contact area of the bottom of the base is attached to the ground, the inclination of the bottom supporting part of the base caused by the inclination of the ladder body is avoided, the stability of the bottom of the ladder is enhanced, and the contact area with the ground is enlarged.

3. According to the invention, when the ladder leans against the leaning object, the ladder integrally applies downward force along the inclined plane to the fixed block, the downward force can decompose component force along the horizontal direction, so that the movable plate slides towards the inner cavity direction of the base, the guide pillar moves deeply into the inner cavity, the gear meshed with the guide pillar rotates when the guide pillar moves horizontally, the gear drives the main shaft to rotate, the middle clamping column and the side clamping column rotate along with the rotation, the clamping teeth rotate downwards and finally contact with the ground to form clamping connection, or if a construction site is on a soft soil surface, the clamping teeth can be pricked into the soil to form embedded clamping connection, so that the friction force with the ground is enhanced, and the ladder is suitable for various different environments such as soft soil, cement ground and the like, and the overall stability and safety performance are improved.

Drawings

FIG. 1 is a schematic view of the overall appearance of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic diagram showing the connection of the support block and the fixing block according to the present invention;

FIG. 4 is an exploded view of the internal structure of the base of the present invention;

FIG. 5 is a schematic view of the attachment of the anchor block, guide post and spring of the present invention;

FIG. 6 is a schematic view of the interior cavity of the base of the present invention;

FIG. 7 is a top view of the interior cavity of the base of the present invention;

FIG. 8 is a schematic view of the bottom of the base of the present invention;

FIG. 9 is a schematic diagram of a rotary latch according to the present invention;

FIG. 10 is a schematic view showing the structure of the support plate and the support bar of the present invention;

FIG. 11 is an exploded view of the support pole of the present invention;

fig. 12 is an enlarged view of part a of the present invention.

In the figure: 1. a support column; 2. an upper leaning frame; 3. a support plate; 4. a support rod; 5. a bolt; 6. an upper anti-slip strip; 7. an inclined surface anti-slip strip; 8. a support block; 9. a rotating block; 10. a moving plate; 11. a fixed block; 12. a base; 13. a parting bead; 14. a spherical groove; 15. a through hole; 16. a ball; 17. rotating the clamping block; 1701. a main shaft; 1702. a middle clamping column; 1703. a gear; 1704. a side clamping column; 18. a pressing plate; 19. spherical through grooves; 20. a rear fixed cover; 21. a guide post; 22. a spring; 23. a top cover; 24. a bar-shaped groove; 25. a ball groove; 26. a bottom cleat.

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.

As shown in fig. 1 to 12, in the embodiment of the invention, an outdoor bottom height electric overhaul ladder comprises two support columns 1, wherein the two support columns 1 are arranged in parallel, an upper leaning frame 2 is fixedly arranged at the top of each support column 1, a support plate 3 is fixedly arranged at the inner side of each support column 1, a support rod 4 is fixedly arranged at the top of each support plate 3, a bolt 5 is fixedly arranged at the inner side of each support plate 3, each support plate 3 is fixedly arranged on each support column 1 through the corresponding bolt 5, an upper anti-slip strip 6 is fixedly arranged at the top of each support rod 4, and an inclined surface anti-slip strip 7 is fixedly arranged at the inclined surface of each support column 1.

The bottom of two support column 1 is all fixed mounting has riding block 8, the below of riding block 8 is provided with base 12, the bottom fixed mounting of riding block 8 has rotatory piece 9, the inboard movable joint of base 12 has movable plate 10, the top fixed mounting of base 12 has top cap 23, two bar grooves 24 have been seted up on the surface of top cap 23, the top fixed mounting of movable plate 10 has two fixed blocks 11, two fixed blocks 11 correspond respectively and pass bar groove 24 and extend to the top of top cap 23 and with rotatory piece 9 swing joint.

Wherein, the inner side of the base 12 is fixedly provided with a parting bead 13, the parting bead 13 divides the inner cavity of the base 12 into a front part and a rear part, the bottom of the inner cavity at the rear part of the base 12 is provided with a ball groove 14, the inner part of the ball groove 14 is movably clamped with a ball 16, the bottom of the inner cavity of the base 12 is fixedly provided with a pressing plate 18, the surface of the pressing plate 18 is provided with a spherical through groove 19, the ball 16 is movably clamped at the inner side of the spherical through groove 19, the inner side surface of the movable plate 10 is fixedly connected with a guide pillar 21, the surface of the guide pillar 21 is movably sleeved with a spring 22, the guide pillar 21 passes through the parting bead 13 and extends to the front inner chamber of base 12, ball groove 25 has been seted up to the bottom of movable plate 10, ball 16 and the inner wall contact in ball groove 25, the both ends of spring 22 respectively with parting bead 13 and movable plate 10 contact, back fixed cover 20 fixed mounting is in the rear side of base 12, through-hole 15 has been seted up to the bottom of the front inner chamber of base 12, movable mounting has rotation fixture block 17 in the front inner chamber of base 12, the bottom fixed mounting of base 12 has bottom antislip strip 26.

The rotating clamping block 17 comprises a main shaft 1701, a middle clamping column 1702, a gear 1703 and side clamping columns 1704 are fixedly sleeved on the surface of the main shaft 1701, the two side clamping columns 1704 are respectively located at two ends of the main shaft 1701, one middle clamping column 1702 is arranged and located in the middle of the main shaft 1701, the two gears 1703 are respectively located between the middle clamping column 1702 and the side clamping columns 1704, and the main shaft 1701 is movably mounted in a front inner cavity of the base 12.

The supporting plate 3 is of an isosceles trapezoid structure, rectangular grooves are formed in the top of the supporting rod 4 and the inclined plane located at the front of the supporting rod, the upper anti-slip strip 6 and the inclined plane anti-slip strip 7 are respectively embedded into the rectangular grooves in the top of the supporting rod 4 and the inclined plane, the surfaces of the upper anti-slip strip 6 and the inclined plane anti-slip strip 7 are formed into horizontal strips and are made of rubber blocks, when the ladder leans against other supports in the wall body process, the whole ladder is in an inclined state, at the moment, a conventional falling leg support can be in an inclined state, so that workers fall on feet unstably, the supporting rod 4 is improved, the inclined plane is designed into a trapezoid table with the inclined plane, the inclined plane of the ladder can compensate the inclined angle of the ladder in the inclined process of the supporting rod 4, the falling leg surface of the supporting rod 4 is properly flattened, the contact surface between the soles of workers and the supporting rod 4 is enlarged, and the effect of the foots of the workers can be avoided by simultaneously increasing friction coefficients through the upper anti-slip strip 6 and the inclined plane anti-slip strip 7.

The side wall of the inner cavity at the rear part of the base 12 is provided with a transverse rectangular groove, the front end of the transverse rectangular groove reaches the parting bead 13, the rear end of the transverse rectangular groove penetrates through the rear port of the base 12, the two sides of the movable plate 10 are provided with strip-shaped protrusions, the strip-shaped protrusions are movably clamped into the transverse rectangular groove, the rectangular groove formed in the inner wall of the base 12 is matched with the strip-shaped protrusions of the movable plate 10, and the two main functions are limiting and guiding the movable plate 10, so that the movable plate 10 is prevented from shifting and deviating in the translation process.

The two equal rows of the ball grooves 14 are arranged at the bottom of the inner cavity of the base 12, eight ball grooves 14 are arranged in each row, the number and the positions of the ball grooves 19 arranged on the pressing plate 18 correspond to those of the ball grooves 14, the inner wall of each ball groove 19 is an annular cambered surface attached to the surface of the corresponding ball 16, the inner diameter of the top of each ball groove 19 is smaller than the diameter of the corresponding ball 16, the upper part of the corresponding ball 16 can be clamped by the corresponding ball grooves 19, the corresponding ball grooves 19 are fixedly arranged at the bottom of the inner cavity of the base 12 through screws, the balls 16 cannot be separated under the clamping of the corresponding ball grooves 19 due to the fact that the inner diameter of the top of each ball groove 19 is smaller than the diameter of the corresponding ball 16, the corresponding ball 16 can rotate freely, and the resistance born by the moving of the fixed block 11 is reduced due to the supporting of the corresponding ball 16.

The bottom of the ports of the two guide posts 21 are provided with teeth, the teeth at the ports of the two guide posts 21 are respectively engaged with the two gears 1703, and the gears 1703 can rotate due to the engagement between the teeth in the process of stretching and translating the guide posts 21 back and forth.

The cross-sectional shapes of the middle clamping column 1702 and the side clamping columns 1704 are consistent, the length of the middle clamping column 1702 is larger than that of the side clamping columns 1704, clamping teeth are arranged on the surfaces of the middle clamping column 1702 and the side clamping columns 1704, the clamping teeth occupy one third of the space on the surfaces of the middle clamping column 1702 and the side clamping columns 1704, when a ladder leans against a leaning object, a worker starts climbing, the bottom rotating block 9 of the supporting block 8 and the fixed block 11 relatively rotate, the fixed block 11 keeps unchanged in angle, the whole ladder applies downward force along the inclined plane to the fixed block 11, the downward force can decompose a component force along the horizontal direction, so that the movable plate 10 slides towards the inner cavity direction of the base 12, the guide column 21 moves inwards, the spring 22 is compressed, the spring 22 can play a reset role on the fixed block 11, when the guide column 21 moves horizontally, the gear 1703 meshed with the middle clamping column 1702 rotates, the side clamping columns 1704 rotate along with the gear 1701, in an initial state, the middle clamping column 1702 and the side clamping columns rotate along with the side clamping columns, the clamping columns rotate along with the inclined plane, the clamping teeth face upwards, and the clamping teeth contact with the ground face in a soft ground, or the ground is formed in a soft ground contact place, and the ground is formed in a soft ground contact place, if the clamping place is formed.

Working principle and using flow:

when the ladder leans against other supports in the wall process, the whole ladder is in an inclined state, at the moment, a conventional falling support can generate an inclined state, so that workers fall on feet unstably, the supporting rod 4 is improved, the ladder is designed into a trapezoid table with an inclined plane, the inclined plane compensates the inclined angle of the ladder in the inclined process of the supporting rod 4, the falling surface of the supporting rod 4 is leveled in a proper amount, so that the contact surface between the soles of the workers and the supporting rod 4 is enlarged, and the friction coefficient can be increased at the same time by the upper anti-slip strip 6 and the inclined plane anti-slip strip 7, so that the foot slip of the workers is avoided;

when the ladder is inclined, the rotating block 9 and the fixed block 11 can relatively rotate, and the rotating angle is increased along with the increase of the leaning inclination angle of the ladder, so that the state of the base 12 is kept unchanged all the time, the base 12 can be placed on the ground all the time horizontally, and the maximum contact area of the bottom of the base 12 is attached to the ground;

when the ladder leans against the leaning object, the rotating block 9 at the bottom of the supporting block 8 and the fixed block 11 rotate relatively, the fixed block 11 keeps the angle unchanged, the ladder integrally applies downward force along the inclined plane to the fixed block 11, the downward force of the inclined plane can decompose the component force along the horizontal direction, so that the movable plate 10 slides towards the inner cavity direction of the base 12, the guide pillar 21 translates to the depth of the inner cavity, the spring 22 is compressed, when the guide pillar 21 translates, the gear 1703 meshed with the movable plate rotates, the gear 1703 drives the main shaft 1701 to rotate, the middle clamping post 1702 and the side clamping post 1704 rotate along with the fixed block 11, and in the initial state, the clamping teeth on the surfaces of the middle clamping post 1702 and the side clamping post 1704 face upwards, rotate downwards and finally contact with the ground to form clamping connection, or if the construction site is on the soft soil surface, the clamping teeth can be clamped into the soil to form embedded clamping connection, and the friction force with the ground is enhanced.

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

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

Claims (4)

1. The utility model provides an outdoor high electric power of end overhauls ladder, includes support column (1), its characterized in that: the support columns (1) are arranged in parallel, an upper leaning frame (2) is fixedly arranged at the tops of the two support columns (1), a support plate (3) is fixedly arranged at the inner sides of the two support columns (1), a support rod (4) is fixedly arranged at the tops of the support plates (3), bolts (5) are fixedly arranged at the inner sides of the support plates (3), the support plate (3) is fixedly arranged on the support columns (1) through the bolts (5), an upper anti-slip strip (6) is fixedly arranged at the tops of the support rods (4), and an inclined surface anti-slip strip (7) is fixedly arranged at the inclined surface of the support rod (4);

the bottom of two support columns (1) is fixedly provided with a support block (8), the lower part of the support block (8) is provided with a base (12), the bottom of the support block (8) is fixedly provided with a rotating block (9), the inner side of the base (12) is movably clamped with a movable plate (10), the top of the base (12) is fixedly provided with a top cover (23), the surface of the top cover (23) is provided with two strip-shaped grooves (24), the top of the movable plate (10) is fixedly provided with two fixed blocks (11), and the two fixed blocks (11) respectively correspondingly extend to the upper part of the top cover (23) through the strip-shaped grooves (24) and are movably connected with the rotating block (9);

the utility model discloses a base, including base (12) and movable cover, partition (13) are installed to the inboard fixed mounting of base (12), partition (13) divide into front and back two parts with the inner chamber of base (12), ball groove (14) have been seted up to the bottom of base (12) rear portion inner chamber, ball groove (16) have been seted up to the inside movable joint of ball groove (14), the bottom fixed mounting of base (12) inner chamber has clamp plate (18), spherical through groove (19) have been seted up to the surface of clamp plate (18), ball (16) movable joint is in the inboard of spherical through groove (19), the medial surface fixedly connected with guide pillar (21) of movable cover (10), spring (22) have been cup jointed in the surface activity of guide pillar (21), guide pillar (21) pass partition (13) and extend to the front portion inner chamber of base (12), ball groove (25) have been seted up to the bottom of movable cover (10), ball groove (16) and the inner wall contact of ball groove (25), the both ends of spring (22) respectively with partition (13) and movable cover (10), the front portion of base (12) have the fixed cover (20) in the rear portion of base (12), the bottom of the base (12) is fixedly provided with a bottom anti-slip strip (26);

the rotary clamping block (17) comprises a main shaft (1701), wherein an intermediate clamping column (1702), a gear (1703) and side clamping columns (1704) are fixedly sleeved on the surface of the main shaft (1701), the two side clamping columns (1704) are respectively arranged at two ends of the main shaft (1701), the intermediate clamping column (1702) is provided with one middle part and is positioned in the middle of the main shaft (1701), the gear (1703) is provided with two side clamping columns (1704) which are respectively positioned between the intermediate clamping column (1702), and the main shaft (1701) is movably arranged in a front inner cavity of the base (12);

teeth are formed at the bottoms of the ports of the two guide posts (21), and the teeth at the ports of the two guide posts (21) are respectively meshed with two gears (1703) correspondingly;

the cross-sectional shapes of the middle clamping column (1702) and the side clamping columns (1704) are consistent, the length of the middle clamping column (1702) is larger than that of the side clamping columns (1704), clamping teeth are arranged on the surfaces of the middle clamping column (1702) and the side clamping columns (1704), and the clamping teeth occupy one third of the space on the surfaces of the middle clamping column (1702) and the side clamping columns (1704).

2. The outdoor use floor height power access ladder of claim 1, wherein: the supporting plate (3) is of an internally hollow triangular prism structure, the supporting rod (4) is of an isosceles trapezoid structure, rectangular grooves are formed in the top of the supporting rod (4) and the inclined plane located at the front, the upper anti-slip strip (6) and the inclined plane anti-slip strip (7) are respectively embedded into the rectangular grooves in the top of the supporting rod (4) and the inclined plane, and the surfaces of the upper anti-slip strip (6) and the inclined plane anti-slip strip (7) are formed in a horizontal strip shape and are made of rubber blocks.

3. The outdoor use floor height power access ladder of claim 1, wherein: the lateral wall of the inner cavity at the rear part of the base (12) is provided with a transverse rectangular groove, the front end of the transverse rectangular groove reaches the parting bead (13) and the rear end penetrates through the rear port of the base (12), the two sides of the moving plate (10) are provided with strip-shaped bulges, and the strip-shaped bulges are movably clamped into the transverse rectangular groove.

4. The outdoor use floor height power access ladder of claim 1, wherein: the ball-shaped groove (14) is provided with two rows with equal quantity at the bottom of the inner cavity of the base (12), each row of ball-shaped grooves (14) is provided with eight ball-shaped through grooves (19), the quantity and the position of the ball-shaped through grooves (19) on the pressing plate (18) are corresponding to those of the ball-shaped grooves (14), the inner wall of the ball-shaped through grooves (19) is an annular cambered surface attached to the surface of the ball (16), and the inner diameter of the top of the ball-shaped through grooves (19) is smaller than the diameter of the ball (16).