CN221940056U - A weight-limited ladder - Google Patents

Abstract

The utility model proposes a weight-limited ladder frame, including a base, four groups of support columns are fixedly installed on the upper surface of the base, a pedal structure is arranged on the top of the support column, the pedal structure includes a fixed plate, a handrail is fixedly installed on the top of the fixed plate, a weight-limited device is arranged between the fixed plates, an escalator is fixedly installed between the fixed plate and the base, a control panel is fixedly installed on the front side wall of the support column, and a roller is fixedly installed at the bottom of the base. The utility model designs a weight-limited device on a weight-limited ladder frame. When the weight on the first load-bearing plate is greater than the value set by the pressure sensor, the control panel starts the hydraulic push rod to drive the second pedal and the first load-bearing plate to move downward to lower the overall center of gravity of the ladder frame. Then, the bottom of the second pedal contacts the top of the second load-bearing plate to achieve the weight limit of the ladder frame, thereby reducing the phenomenon that the ladder frame as a whole tilts due to the overload of weight on the maintenance platform during maintenance, thereby injuring the machine body and the staff.

Description

A weight-limited ladder

Technical Field

The utility model relates to the technical field of ladder frames, in particular to a weight-limited ladder frame.

Background Art

The space shuttle maintenance platform is used as aircraft access equipment. It is a large-scale maintenance equipment composed of a ladder and a walkway system. Movable casters are usually installed at the bottom to achieve free movement and facilitate workers to carry it.

In order to be able to repair or paint the top of the back of the aircraft, a maintenance rack is generally used. The maintenance rack is mainly built for aircraft maintenance. At present, when the maintenance rack is in use, in order to be closer to the aircraft maintenance part, a maintenance platform is generally built on the top. When the personnel stand on the maintenance platform, due to the weight of the maintenance personnel and the weight of the maintenance tools, the center is located on the maintenance platform. When the weight on the maintenance platform is heavy, it may cause the maintenance ladder to tilt or tip over, thereby causing damage to the aircraft or maintenance personnel.

Therefore, in response to the above problems, we propose a weight-limited ladder frame.

Utility Model Content

The purpose of the utility model is to provide a weight-limited ladder frame to solve the problems raised by the above-mentioned background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a weight-limited ladder frame, comprising a base, four groups of support columns are fixedly installed on the upper surface of the base, a pedal structure is arranged on the top of the support column, the pedal structure comprises a fixed plate, a handrail is fixedly installed on the top of the fixed plate, a weight-limited device is arranged between the fixed plates, an escalator is fixedly installed between the fixed plates and the base, a control panel is fixedly installed on the front side wall of the support column, a roller is fixedly installed on the bottom of the base, and a first reinforcing rod is fixedly installed between the support column and the escalator.

As a further description of the utility model: a first pedal is fixedly installed between the two groups of fixed plates on one side of the weight limiting device, the first pedal and the fixed plate are provided with the same first fixing hole, and a second reinforcing rod is fixedly installed between the first pedal and the support column.

As a further description of the present invention: a second fixing hole is also opened inside the fixing plate, and the fixing plate is fixedly installed on the end of the support column away from the base through the second fixing hole.

As a further description of the utility model: the weight limiting device includes a first load-bearing plate, which is located between two groups of fixed plates and is horizontal to the first pedal, a second pedal of matching size is slidably connected to the inside of the first load-bearing plate, limiting blocks are fixedly installed on the outer walls on both sides of the second pedal, a limiting groove matching the limiting block is opened inside the first load-bearing plate, and pressure sensors are fixedly installed at the four corners inside the first load-bearing plate.

As a further description of the utility model: two groups of hydraulic push rods are fixedly installed on the bottom of the first load-bearing plate, one end of the hydraulic push rod away from the first load-bearing plate is fixedly connected to the base, a second load-bearing plate is sleeved on the hydraulic push rod, both ends of the second load-bearing plate are fixedly connected to the support column, and a third reinforcement rod is fixedly installed between the bottom of the second load-bearing plate and the support column.

As a further description of the present utility model: the pressure sensor is connected to the control panel, the number of the rollers is six groups, and the rollers are provided with a locking structure.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model designs a weight limiting device composed of a first load-bearing plate and a second pedal on a weight-limiting ladder frame. When in use, when the weight of the staff and maintenance tools on the first load-bearing plate is greater than the value set by the pressure sensor, the pressure sensor starts the hydraulic push rod through the control panel to drive the second pedal and the first load-bearing plate to move downward to lower the overall center of gravity of the ladder frame. Then, the bottom of the second pedal contacts the top of the second load-bearing plate to achieve the weight limit of the ladder frame, thereby reducing the phenomenon that the ladder frame as a whole tilts due to the overload of weight on the maintenance platform during the maintenance process, thereby injuring the body and the staff.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall three-dimensional structure of the utility model;

FIG2 is a schematic diagram of the pedal structure of the present utility model;

FIG3 is a schematic diagram of the structure of the limit device of the utility model;

FIG. 4 is a schematic diagram of the internal structure of the first load-bearing plate of the present invention.

In the figure: 1. base; 2. support column; 3. pedal structure; 301. fixing plate; 302. first pedal; 303. first fixing hole; 304. second fixing hole; 305. second reinforcing rod; 4. handrail; 5. weight limiting device; 501. first load-bearing plate; 502. second pedal; 503. limit block; 504. limit groove; 505. pressure sensor; 506. hydraulic push rod; 507. second load-bearing plate; 508. third reinforcing rod; 6. escalator; 7. control panel; 8. roller; 9. first reinforcing rod.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1 to 4. The utility model provides a technical solution: a weight-limited ladder frame, including a base 1, four groups of support columns 2 are fixedly installed on the upper surface of the base 1, a pedal structure 3 is arranged on the top of the support column 2, the pedal structure 3 includes a fixed plate 301, a handrail 4 is fixedly installed on the top of the fixed plate 301, a weight-limited device 5 is arranged between the fixed plates 301, an escalator 6 is fixedly installed between the fixed plates 301 and the base 1, a control panel 7 is fixedly installed on the front side wall of the support column 2, a roller 8 is fixedly installed on the bottom of the base 1, and a first reinforcing rod 9 is fixedly installed between the support column 2 and the escalator 6.

In this embodiment: a first pedal 302 is fixedly installed between the two sets of fixing plates 301 on one side of the weight limiting device 5, the first pedal 302 and the fixing plate 301 have the same first fixing hole 303 opened inside, and a second reinforcing rod 305 is fixedly installed between the first pedal 302 and the support column 2.

During specific use: the second reinforcing rod 305 and the first fixing hole 303 can increase the load-bearing capacity of the first pedal 302 .

In this embodiment, a second fixing hole 304 is further provided inside the fixing plate 301 , and the fixing plate 301 is fixedly mounted on an end of the supporting column 2 away from the base 1 through the second fixing hole 304 .

During specific use: the fixing plate 301 can be fixedly connected to the supporting column 2 through the second fixing hole 304 .

In this embodiment: the weight limiting device 5 includes a first load-bearing plate 501, which is located between the two sets of fixed plates 301 and is horizontal to the first pedal 302. A second pedal 502 of a matching size is slidably connected inside the first load-bearing plate 501, and limiting blocks 503 are fixedly installed on the outer walls on both sides of the second pedal 502. A limiting groove 504 matching the limiting block 503 is opened inside the first load-bearing plate 501, and pressure sensors 505 are fixedly installed at the four corners inside the first load-bearing plate 501.

During specific use: the limiting block 503 and the limiting groove 504 can prevent the first load-bearing plate 501 from tilting when sliding up and down inside the second pedal 502, causing the staff to stand unsteadily.

In this embodiment: two groups of hydraulic push rods 506 are fixedly installed on the bottom of the first load-bearing plate 501, and one end of the hydraulic push rod 506 away from the first load-bearing plate 501 is fixedly connected to the base 1, and a second load-bearing plate 507 is sleeved on the hydraulic push rod 506. The two ends of the second load-bearing plate 507 are fixedly connected to the support column 2, and a third reinforcing rod 508 is fixedly installed between the bottom of the second load-bearing plate 507 and the support column 2.

During specific use: after the weight on the first load-bearing plate 501 exceeds the standard, the hydraulic push rod 506 can drive the second pedal 502 and the first load-bearing plate 501 to move downward, thereby lowering the center of gravity of the ladder frame and facilitating maintenance personnel or maintenance tools to quickly move away from the ladder frame, thereby reducing the load-bearing capacity of the ladder frame.

In this embodiment: the pressure sensor 505 is connected to the control panel 7, the number of rollers 8 is six groups, and the rollers 8 are provided with a locking structure.

During specific use: the pressure sensor 505 can set a pressure value through the control panel 7. When the pressure value is reached, the pressure sensor 505 can start the hydraulic push rod 506 through the control panel 7. The locking structure on the roller 8 can fix the device after the device is moved to a designated location.

Working principle: When in use, the staff can climb up the escalator 6 to the first load-bearing plate 501, and the first load-bearing plate 501 slides downward through the limit block 503 and the limit groove 504, and squeezes the pressure sensor 505. When the weight of the staff and the maintenance tools is less than the value set by the pressure sensor 505, the control panel 7 does not start the hydraulic push rod 506, and the staff can walk along the first load-bearing plate 501 to the first pedal 302 to maintain the machine body. When the weight of the staff and the maintenance tools is greater than the value set by the pressure sensor 505, the pressure sensor 505 starts the hydraulic push rod 506 through the control panel 7, driving the second pedal 502 and the first load-bearing plate 501 to move downward until the bottom of the second pedal 502 contacts the top of the second load-bearing plate 507, so as to realize the weight limit of the ladder frame, thereby reducing the phenomenon that the ladder frame as a whole tilts due to the overload of weight on the maintenance platform during the maintenance process, thereby injuring the machine body and the staff.

The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. A weight-limited ladder frame, comprising a base (1), characterized in that: four groups of support columns (2) are fixedly mounted on the upper surface of the base (1), a pedal structure (3) is arranged on the top of the support column (2), the pedal structure (3) comprises a fixed plate (301), a handrail (4) is fixedly mounted on the top of the fixed plate (301), a weight-limited device (5) is arranged between the fixed plates (301), an escalator (6) is fixedly mounted between the fixed plates (301) and the base (1), a control panel (7) is fixedly mounted on the front side wall of the support column (2), a roller (8) is fixedly mounted on the bottom of the base (1), and a first reinforcing rod (9) is fixedly mounted between the support column (2) and the escalator (6). 2. A weight-limited ladder frame according to claim 1, characterized in that: a first pedal (302) is fixedly installed between the two groups of fixed plates (301) on one side of the weight-limiting device (5), the first pedal (302) and the fixed plate (301) have the same first fixing hole (303) opened inside, and a second reinforcing rod (305) is fixedly installed between the first pedal (302) and the support column (2). 3. A weight-limited ladder frame according to claim 2, characterized in that: a second fixing hole (304) is further opened inside the fixing plate (301), and the fixing plate (301) is fixedly installed on the end of the support column (2) away from the base (1) through the second fixing hole (304). 4. A weight-limiting ladder frame according to claim 1, characterized in that: the weight-limiting device (5) includes a first load-bearing plate (501), the first load-bearing plate (501) is located between the two sets of fixed plates (301) and is horizontal to the first pedal (302), a second pedal (502) of a matching size is slidably connected inside the first load-bearing plate (501), limiting blocks (503) are fixedly installed on the outer walls on both sides of the second pedal (502), a limiting groove (504) matched with the limiting block (503) is opened inside the first load-bearing plate (501), and pressure sensors (505) are fixedly installed at the four corners inside the first load-bearing plate (501). 5. A weight-limited ladder frame according to claim 4, characterized in that: two groups of hydraulic push rods (506) are fixedly installed at the bottom of the first load-bearing plate (501), and the end of the hydraulic push rod (506) away from the first load-bearing plate (501) is fixedly connected to the base (1), and a second load-bearing plate (507) is sleeved on the hydraulic push rod (506), and the two ends of the second load-bearing plate (507) are fixedly connected to the support column (2), and a third reinforcing rod (508) is fixedly installed between the bottom of the second load-bearing plate (507) and the support column (2). 6. A weight-limited ladder frame according to claim 4, characterized in that: the pressure sensor (505) is connected to the control panel (7), the number of the rollers (8) is six groups, and the rollers (8) are provided with a locking structure.