CN112177516A

CN112177516A - Movable ladder

Info

Publication number: CN112177516A
Application number: CN202011017278.1A
Authority: CN
Inventors: 李泽明; 罗育辉; 余海腾; 胡全; 黄晓俊; 刘文威; 周亚武
Original assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-01-05

Abstract

The invention relates to the technical field of maintenance tools, and particularly discloses a movable ladder. The movable ladder comprises a ladder frame, a driving device, rollers and a braking assembly, wherein the driving device is arranged on the ladder frame, the rollers are arranged at the bottom of the ladder frame, the driving device is in transmission connection with the rollers to drive the rollers to roll, the braking assembly is arranged on the ladder frame and located above the rollers, and the braking assembly is configured to be capable of being in contact with the rollers to prevent the rollers from rotating. The movable ladder can not only save physical power of maintainers, but also avoid time waste, thereby improving the working efficiency.

Description

Movable ladder

Technical Field

The invention relates to the technical field of maintenance tools, in particular to a movable ladder.

Background

The maintenance personnel often will use the ladder in the inspection of power distribution station, because the inspection of power distribution station can involve the maintenance point of a plurality of different positions, and current ladder inspection personnel can't accomplish the position and shift on the ladder in the use, consequently, the maintenance personnel need frequently go up and down the ladder and move the ladder to different maintenance points, not only use inconvenience, extravagant maintenance personnel's time and physical power, also make work efficiency low.

Disclosure of Invention

Based on the above, the invention aims to provide a movable ladder, which can save working time and physical strength of maintainers and improve working efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

a movable ladder comprises a ladder frame, a driving device, a roller and a braking assembly;

the driving device is arranged on the ladder frame, the roller is arranged at the bottom of the ladder frame, the driving device is in transmission connection with the roller to drive the roller to roll, the braking assembly is arranged on the ladder frame and located above the roller, and the braking assembly is configured to be capable of being in contact with the roller to prevent the roller from rotating.

As a preferable aspect of the movable ladder, the driving means includes:

the driving component is in driving connection with the transmission component, and the transmission component is connected with the roller.

As a preferable scheme of the movable ladder, the driving assembly is a crank, and the crank is arranged at the upper end of the ladder frame and is in transmission connection with the transmission assembly.

As a preferred aspect of the movable ladder, the crank is configured to be swingable in a horizontal direction to change the orientation of the roller.

As a preferred aspect of the movable ladder, the driving assembly comprises:

the driving wheel is connected with the crank, and the driven wheel is coaxially connected with the roller.

As a preferable aspect of the movable ladder, the braking assembly includes:

the brake device comprises a brake rod and a brake piece, wherein the brake piece is connected to the bottom end of the brake rod, the brake rod can move up and down, the brake piece can be in contact with the roller, and the shape of the contact surface of the brake piece in contact with the roller is matched with the shape of the roller.

As a preferable aspect of the movable ladder, the brake assembly further comprises:

the fixing frame is fixedly connected in the ladder frame and is provided with a through hole, and the brake rod penetrates through the through hole and can move up and down along the through hole.

the brake rod is fixedly arranged on the brake rod, the elastic piece is sleeved on the brake rod, and two ends of the elastic piece are respectively abutted to the fixing frame and the limiting plate.

and the pressing plate is connected to the upper end of the brake rod and protrudes out of the ladder rack, and the brake rod drives the brake piece to move downwards to be in contact with the roller when being pressed.

As a preferable aspect of the movable ladder, the ladder frame includes:

the folding ladder comprises a first ladder beam, a second ladder beam, a first top plate and a second top plate, wherein the first top plate is connected to the top of the first ladder beam, the second top plate is connected to the top of the second ladder beam, the first top plate is hinged to the second top plate, and the first top plate and the second top plate are configured to be capable of driving the first ladder beam and the second ladder beam to fold or unfold.

The invention has the beneficial effects that:

the invention provides a movable ladder, which comprises a ladder frame, a driving device, rollers and a braking assembly, wherein the driving device is arranged on the ladder frame, the rollers are arranged at the bottom of the ladder frame, the driving device is in transmission connection with the rollers, the braking assembly is arranged on the ladder frame and positioned above the rollers, the rollers are driven to rotate by the driving device so as to drive the ladder frame to move, and a maintainer can complete position transfer on the ladder frame; and the roller can be prevented from rolling by operating the brake assembly, the ladder frame is conveniently stopped and stabilized at the destination, the time and physical strength of maintainers are saved, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention 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 the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural view of a movable ladder provided by an embodiment of the present invention;

fig. 2 is a sectional view of a part of the structure of a movable ladder according to an embodiment of the present invention.

In the figure:

1-a ladder frame; 11-a ladder beam; 12-a top plate; 13-a support bar; 111-a first ladder beam; 112-a second ladder beam; 121-a first top plate; 122-a second top panel; 123-hinge; 131-a first support bar; 132-a second support bar; 133-a hinge;

2-a drive device; 21-a drive assembly; 22-a transmission assembly; 221-a driving wheel; 222-a driven wheel; 223-a transmission belt;

3, rolling wheels;

4-a brake assembly; 41-brake lever; 42-a braking member; 43-a holder; 44-an elastic member; 45-limiting plate; 46-a platen; 47-pressing the through hole; 421-brake disc; 422-brake block;

10-a first containing cavity; 20-a second containing cavity.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1, the present embodiment provides a movable ladder including a ladder frame 1, the ladder frame 1 in turn including ladder beams 11 and a roof plate 12, the roof plate 12 being attached to the tops of the ladder beams 11. Specifically, the ladder beam 11 includes a first ladder beam 111 and a second ladder beam 112, the first ladder beam 111 and the second ladder beam 112 have the same structure, and respectively include two vertical beams and a plurality of cross beams, and the plurality of cross beams are connected between the two vertical beams at intervals. The top plate 12 includes a first top plate 121 and a second top plate 122, the first top plate 121 is connected to the top of the first ladder beam 111, the second top plate 122 is connected to the top of the second ladder beam 112, and the first top plate 121 and the second top plate 122 are hinged. Preferably, the first top plate 121 and the second top plate 122 are connected by a hinge 123, and the first top plate 121 and the second top plate 122 can drive the first ladder beam 111 and the second ladder beam 112 to fold or unfold through opening and closing of the hinge 123.

Preferably, two support bars 13 are spaced between the first ladder beam 111 and the second ladder beam 112, the support bars 13 include a first support bar 131 and a second support bar 132, and the first support bar 131 and the second support bar 132 are connected by a hinge 133. When the ladder frame 1 is erected, the support rod 13 can tension the first ladder beam 111 and the second ladder beam 112 to make the ladder frame 1 more stable; when the ladder rack 1 needs to be folded, the first support bar 131 and the second support bar 132 can drive the first ladder beam 111 and the second ladder beam 112 to fold.

As shown in fig. 2, the movable ladder further comprises a driving device 2 and rollers 3, the driving device 2 is disposed on the ladder frame 1, specifically on the vertical beams of the first ladder beam 111 or the second ladder beam 112, and the driving device 2 is in transmission connection with the rollers 3 to drive the rollers 3 to roll. Optionally, the bottom of the vertical beam is provided with a groove, the roller 3 is rotatably installed in the groove and protrudes out of the groove, furthermore, the groove comprises two opposite side walls, a rotating shaft is rotatably arranged between the two side walls, and the roller 3 is fixedly arranged on the rotating shaft. Preferably, two rollers 3 on the first ladder beam 111 or the second ladder beam 112 are respectively connected with one driving device 2. In this embodiment, it is preferable to provide one driving device 2 on each of the two vertical beams of the first ladder beam 111, however, in other embodiments, each roller 3 may be correspondingly connected to one driving device 2.

Specifically, the driving device 2 comprises a driving assembly 21 and a transmission assembly 22, the driving assembly 21 is connected to the transmission assembly 22 in a driving manner, and the transmission assembly 22 is connected with the roller 3. Preferably, the driving assembly 21 is a crank, and the crank is protrudingly disposed on the first top plate 121 and is drivingly connected to the transmission assembly 22, so as to facilitate manual control of the rotation speed of the crank, and thus control of the rolling speed of the roller 3. Of course, in other embodiments, the driving assembly 21 may also be a driving motor, and the output end of the driving motor is connected to the transmission assembly 22 in a transmission manner. Under above-mentioned structure, maintainer can rotate through rotating crank drive roller 3 on ladder frame 1 for the ladder removes, saves maintainer's time and physical power, thereby improves work efficiency. And because each set of drive arrangement 2 and gyro wheel 3 are independent each other, and the crank can slightly swing along the horizontal direction, consequently, can realize turning to of ladder frame 1 through the swing crank, exemplarily, the crank swings certain angle along the horizontal direction to make the orientation of gyro wheel 3 different, wave the crank again and drive gyro wheel 3 and roll, make ladder frame 1 move along the orientation of gyro wheel 3, realized turning to of ladder frame 1 promptly.

In order to improve the compactness, as shown in fig. 2, a first accommodating cavity 10 and a second accommodating cavity 20 are arranged in the ladder frame 1, a transmission assembly 22 is arranged in the first accommodating cavity 10, the transmission assembly 22 comprises a driving wheel 221, a driven wheel 222 and a transmission belt 223, and the transmission belt 223 is wound on the driving wheel 221 and the driven wheel 222. Alternatively, the transmission assembly 22 may be a belt transmission mechanism or a chain transmission mechanism, and correspondingly, the transmission belt 223 may be a belt or a chain. The driving wheel 221 is connected with the crank, the driven wheel 222 is coaxially connected with the roller 3 through a rotating shaft, and the transmission belt 223 extends along the vertical beam. Preferably, the shaft is fitted with bearings in order to support the rotating parts and reduce friction. The maintainer drives the transmission component 22 to operate through the crank, thereby driving the roller 3 to roll and realizing the movement of the ladder rack 1. Adopt above-mentioned drive arrangement 2, compare in other drive structures, for example, electric drive structure, not only simple structure and with the shape adaptation of ladder frame 1, the maintainer can only need to realize the position with the hand and shift on ladder frame 1 moreover.

Further, the movable ladder also comprises a brake assembly 4, the brake assembly 4 is partially arranged in the second accommodating cavity 20 and is positioned above the roller 3, and the brake assembly 4 is configured to be capable of contacting with the roller 3 to prevent the roller 3 from rotating. Specifically, brake assembly 4 includes brake lever 41 and brake member 42, and brake lever 41 and brake member 42 are both disposed in second receiving cavity 20. Brake piece 42 is connected in the bottom of brake lever 41, and brake lever 41 can move up and down, and brake piece 42 can contact with gyro wheel 3, and the appearance of the contact surface that brake piece 42 and gyro wheel 3 contacted is adapted with the shape of gyro wheel 3 to improve braking accuracy. Preferably, brake member 42 includes a brake disc 421 and a brake pad 422, brake disc 421 is connected to the bottom end of brake lever 41, brake pad 422 is connected to the bottom end of brake disc 421, and the shape of brake pad 422 is adapted to the shape of roller 3.

Further, the brake assembly 4 further includes a fixing frame 43, an elastic member 44 and a limiting plate 45 disposed in the second accommodating chamber 20, the fixing frame 43 is fixedly disposed on the inner wall of the second accommodating chamber 20, a through hole is disposed in the middle of the fixing frame 43, the limiting plate 45 is fixedly disposed on the brake lever 41, the brake lever 41 can move up and down along the through hole, the elastic member 44 is sleeved on the brake lever 41, two ends of the elastic member 44 abut against the fixing frame 43 and the limiting plate 45 respectively, and the elastic member 44 is preferably a spring in this example. With this structure, after braking is finished, the elastic restoring force of the elastic member 44 can lift the limiting plate 45 upwards, so as to drive the brake lever 41 to move upwards, and the brake member 42 is separated from the roller 3.

To facilitate braking, the brake assembly 4 further comprises a pressure plate 46, the pressure plate 46 being attached to the top of the brake lever 41 and being arranged to protrude from the ladder rack 1. In order to brake the roller 3 through the pressing plate 46, the pressing through holes 47 are respectively formed in the first ladder beam 111 and the second ladder beam 112, the pressing plate 46 can move up and down in the pressing through holes 47, so that the pressing or treading operation of the maintainer is facilitated, and when the pressing plate 46 is pressed downwards, the brake rod 41 drives the brake piece 42 to move downwards to contact with the roller 3, so that the braking effect is realized.

Because the maintainer can't use both hands braking when overhauing, adopt above-mentioned brake assembly 4, compare in other arresting gear, for example embrace the device of stopping, simple structure saves space, and with the shape looks adaptation of ladder frame 1, the maintainer only needs can realize the braking through trampling the clamp plate moreover.

The operation of the movable ladder is explained as follows:

when the movable ladder needs to be used, the first ladder beam 111 and the second ladder beam 112 are pulled open by hands until the first top plate 121 and the second top plate 122 are positioned on the same plane, at the moment, the support rod 13 is stretched flat, and a maintainer climbs the ladder frame 1 to work; when the ladder frame needs to be moved to the next maintenance point, the crank is rotated to drive the driving wheel 221 to rotate, and the driven wheel 222 is driven to rotate through the transmission belt 223, so that the roller 3 coaxially connected with the driven wheel 222 rolls, and the ladder frame 1 moves to the destination; when the ladder frame needs to move towards different directions, the cranks at the two sides are swung to realize the steering of the ladder frame 1.

After the target station is reached, a maintainer only needs to sit on the top plate 12, then step on one pressing plate 46 with one foot, the pressing plate 46 moves downwards in the pressing through hole 47 to move the braking rod 41, the braking rod 41 moves downwards, the braking piece 42 is driven to be in contact with the roller 3, the roller 3 stops rolling, and therefore the ladder frame 1 is stabilized at the destination, and at the moment, the elastic piece 44 on the braking rod 41 is compressed between the limiting plate 45 and the fixing frame 43; when it is desired to move the ladder 1 again, the pressing plate 46 is released, the restraining plate 45 moves upward under the restoring force of the elastic member 44, and the brake lever 41 is moved upward, thereby disengaging the brake member 42 from the roller 3. The maintainer can accomplish the removal of ladder, turn to and the braking on the ladder, and need not to climb up and climb and move the ladder down, labour saving and time saving, and work efficiency is showing and is improving.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A movable ladder is characterized by comprising a ladder frame (1), a driving device (2), a roller (3) and a braking component (4);

drive arrangement (2) set up in on ladder frame (1), gyro wheel (3) set up in the bottom of ladder frame (1), drive arrangement (2) transmission connect in gyro wheel (3) are in order to drive gyro wheel (3) roll, braking component (4) set up in on ladder frame (1) and be located the top of gyro wheel (3), braking component (4) be configured as can with gyro wheel (3) contact in order to prevent gyro wheel (3) rotate.

2. A movable ladder as claimed in claim 1, characterized in that the drive means (2) comprise:

the roller mechanism comprises a driving assembly (21) and a transmission assembly (22), wherein the driving assembly (21) is connected to the transmission assembly (22) in a driving mode, and the transmission assembly (22) is connected with the roller (3).

3. A movable ladder as claimed in claim 2, characterized in that the drive assembly (21) is a crank arranged at the upper end of the ladder frame (1) and in driving connection with the transmission assembly (22).

4. A movable ladder as claimed in claim 3, characterized in that the crank is configured to be swung in a horizontal direction to change the orientation of the roller (3).

5. A movable ladder as claimed in claim 3, characterized in that said transmission assembly (22) comprises:

the driving wheel (221), the driven wheel (222) and the transmission belt (223), the transmission belt (223) is wound on the driving wheel (221) and the driven wheel (222), the driving wheel (221) is connected with the crank, and the driven wheel (222) is coaxially connected with the roller (3).

6. A movable ladder as claimed in claim 1, characterized in that the braking assembly (4) comprises:

the brake device comprises a brake rod (41) and a brake piece (42), wherein the brake piece (42) is connected to the bottom end of the brake rod (41), the brake rod (41) can move up and down, the brake piece (42) can be in contact with the roller (3), and the shape of the contact surface of the brake piece (42) and the roller (3) is matched with the shape of the roller (3).

7. A movable ladder as claimed in claim 1, characterized in that the braking assembly (4) further comprises:

the fixing frame (43) is fixedly connected with the ladder frame (1) and a through hole is formed in the fixing frame (43), and the brake rod (41) penetrates through the through hole and can move up and down along the through hole.

8. A movable ladder as claimed in claim 7, characterized in that the braking assembly (4) further comprises:

elastic component (44) and limiting plate (45), limiting plate (45) fixed set up in on brake lever (41), elastic component (44) cover is located on brake lever (41) and both ends respectively the butt in mount (43) with limiting plate (45).

9. A movable ladder as claimed in claim 6, characterized in that the braking assembly (4) further comprises:

the pressing plate (46) is connected to the upper end of the brake rod (41) and protrudes out of the ladder frame (1), and the brake rod (41) drives the brake piece (42) to move downwards to be in contact with the roller (3) when the pressing plate (46) is pressed.

10. A movable ladder as claimed in claim 1, characterized in that the ladder frame (1) comprises:

the folding device comprises a first ladder beam (111), a second ladder beam (112), a first top plate (121) and a second top plate (122), wherein the first top plate (121) is connected to the top of the first ladder beam (111), the second top plate (122) is connected to the top of the second ladder beam (112), the first top plate (121) is hinged to the second top plate (122), and the first top plate (121) and the second top plate (122) are configured to be capable of driving the first ladder beam (111) and the second ladder beam (112) to fold or unfold.