Automatic telescopic escalator of large-tonnage crane

Abstract

The utility model relates to an automatic telescopic escalator of a large-tonnage crane. The automatic telescopic escalator comprises an escalator body, a fixing frame and a driving mechanism. The escalator comprises an escalator body and a telescopic moving rod arranged on one side of the escalator body. A sliding rail and a driving mechanism are arranged on the fixing frame; a pulley is mounted in the sliding rail; the telescopic moving rod is connected with the sliding rail through the pulley; the driving mechanism is connected with the telescopic moving rod and used for driving the escalator to linearly move along the sliding rail. The automatic telescopic escalator of the large-tonnage crane is formed by processing aluminum alloy sections, is simple in structure and easy to process, reduces the weight of the whole crane, realizes the light weight of the crane, and effectively controls the cost at the same time. The automatic telescopic escalator is easy to operate and control, reasonable in structure and high in stability, the automation level of the whole vehicle is improved, and meanwhile an operator can conveniently, safely and efficiently get in and out of the control cabin.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to an automatic telescopic escalator for large-tonnage cranes. Background Art

[0002] The existing truck crane escalator is fixed to the frame by bolts and is not movable. When going up or down the control room, personnel need to walk on the platform on the frame ( Figure 4 8), go around to the control room ( Figure 4 6) in front of the control room, manually pull open the telescopic pedal ( Figure 4 7) in the figure, and then entering the control room to work is very inconvenient. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide an automatic telescopic escalator for a large-tonnage crane.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The invention discloses an automatic telescopic escalator for a large-tonnage crane. The automatic telescopic escalator comprises an escalator, a fixing frame and a driving mechanism.

[0006] The escalator includes an escalator body and a telescopic movable rod arranged on one side of the escalator body; a slide rail and a driving mechanism are provided on the fixed frame; a pulley is installed in the slide rail; the telescopic movable rod is connected to the slide rail through the pulley; the driving mechanism is connected to the telescopic movable rod, and is used to drive the escalator to move linearly along the slide rail.

[0007] Furthermore, the driving mechanism adopts a servo motor.

[0008] Furthermore, a connecting plate is provided on the outer wall of the fixing frame; the connecting plate is used to install the automatic telescopic escalator on the frame of the crane; the automatic telescopic escalator is installed on the frame below the control room of the crane.

[0009] Furthermore, the escalator is made of aluminum alloy.

[0010] Furthermore, the escalator body includes an escalator frame and multiple layers of pedals sequentially arranged on the escalator frame along the height direction.

[0011] Further, the fixing frame includes a first fixing frame arranged horizontally and a second fixing frame vertically arranged above one end of the first fixing frame; the first fixing frame is U-shaped and includes a first fixing portion and a second fixing portion arranged in parallel, and a first connecting portion connected between the same ends of the first fixing portion and the second fixing portion; the second fixing frame includes a third fixing portion arranged directly above the first fixing portion in parallel and two second connecting portions vertically connected between the first fixing portion and the third fixing portion and arranged at intervals; grooves are provided on the inner walls of the first fixing portion, the second fixing portion, and the third fixing portion as slide rails; the pulley is slidably engaged with the slide rail.

[0012] Further, the telescopic moving rod includes a first telescopic moving rod arranged on one side of the middle section of the escalator main body and a second telescopic moving rod arranged on one side of the bottom of the escalator main body; the second telescopic moving rod is H-shaped and includes two mutually parallel telescopic moving portions respectively arranged at the front and rear ends of the escalator main body and a connecting rod arranged between the two telescopic moving portions. The two mutually parallel telescopic moving portions are respectively a first telescopic moving portion and a second telescopic moving portion.

[0013] Further, the first telescopic moving rod is correspondingly arranged with the third fixing portion and is connected to the pulley in the slide rail on the third fixing portion; the second telescopic moving rod is located between the first fixing portion and the second fixing portion, and the two telescopic moving portions are respectively connected to the pulleys in the slide rails on the first fixing portion and the second fixing portion.

[0014] Further, the automatic telescopic escalator further includes a mechanical locking mechanism; the mechanical locking mechanism is used to lock and fix the escalator after it moves to a set position.

[0015] Further, the automatic telescopic escalator further includes an electric control system; the electric control system is signal-connected to the servo motor.

[0016] Compared with the prior art, the advantages of the present utility model are:

[0017] The automatic telescopic escalator of the large-tonnage crane described in the present utility model is made of aluminum alloy profiles, has a simple structure, is easy to process, reduces the weight of the whole vehicle, realizes the lightweight of the vehicle, and effectively controls the cost at the same time. The automatic telescopic escalator is simple to operate, has a reasonable structure, and high stability. While improving the automation level of the whole vehicle, it also makes it convenient, safe, and efficient for the operator to get on and off the cab. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the automatic telescopic escalator of the large-tonnage crane in the present utility model;

[0019] Figure 2 is a schematic structural view of the escalator in the present utility model;

[0020] Figure 3 is a schematic structural view of the fixing frame in the present utility model;

[0021] Figure 4 is an assembly schematic view of the present utility model on a large-tonnage crane.

[0022] Wherein:

[0023] 1. Escalator, 11. Escalator frame, 12. Pedal, 13. First telescopic moving rod, 14. First telescopic moving part, 15. Second telescopic moving part, 16. Connecting rod; 2. Fixing frame, 21. First fixing part, 22. Second fixing part, 23. First connecting part, 24. Third fixing part, 25. Second connecting part, 26. Pulley, 27. Connecting plate, 28. Slide rail; 3. Driving mechanism, 4. Mechanical locking mechanism, 5. Electric control system, 6. Control room, 7. Telescopic pedal, 8. Walking board, 9. Automatic telescopic escalator. Specific embodiments

[0024] The present utility model will be further described below with reference to the accompanying drawings:

[0025] As Figures 1-4 shown, an automatic telescopic escalator for a large-tonnage crane, the automatic telescopic escalator includes: an escalator 1, a fixing frame 2 and a driving mechanism 3. The escalator 1 includes an escalator main body and a telescopic moving rod arranged on one side of the escalator main body; the fixing frame 2 is provided with a slide rail 28 and a driving mechanism 3; a pulley 26 is installed in the slide rail 28; the telescopic moving rod is connected to the slide rail 28 through the pulley 26; the driving mechanism 3 is connected to the telescopic moving rod for driving the escalator to linearly move along the slide rail. Preferably, the driving mechanism 3 adopts a servo motor. The slide rail 28 is formed by welding profiles of "6-series high-strength aluminum alloy", and a pulley mechanism is provided in the chute of the slide rail. The outside of the slide rail is fixed to the vehicle frame of the crane by a connecting plate 27, reducing the bracket assembly process, and being easy to process and having a firm and reliable structure.

[0026] In the automatic telescopic escalator of the large-tonnage crane described in the present utility model, since the telescopic moving rod is slidably engaged with the slide rail through a pulley, and the servo motor pushes the telescopic moving rod to move, the telescopic moving rod will move linearly along the slide rail together with the pulley, and the escalator connected to the telescopic moving rod will also move linearly, thereby realizing the telescopic movement of the escalator main body. When the escalator main body moves to a suitable position, the mechanical locking mechanism is used to limit and fix the escalator. In this embodiment, the servo motor also has an automatic interlock and alarm prompt function. When the engine is started, if the escalator is not retracted, the electronic control system will issue an alarm prompt of "escalator not in place" on the central control display screen in the cab, and the driver can retract the escalator in the cab through the remote control.

[0027] Further, a connecting plate 27 is provided on the outer wall of the fixed frame 2; the connecting plate 27 is used to install the automatic telescopic escalator 9 on the vehicle frame of the crane; the automatic telescopic escalator 9 is installed on the vehicle frame below the cab 6 of the crane.

[0028] Further, the escalator 1 is made of aluminum alloy. The escalator main body includes an escalator frame 11 and multiple layers of pedals 12 arranged on the escalator frame in the height direction in sequence; the pedals 12 are anti-slip pedals, and an anti-slip pad can be set on the pedals. The escalator main body is welded by profiles of "6-series high-strength aluminum alloy" and is equipped with an aluminum alloy handrail and an aluminum alloy anti-slip pedal (crocodile mouth type anti-slip pattern), with a delicate appearance and a firm structure.

[0029] Further, the fixed frame 2 includes a first fixed frame arranged in the horizontal direction and a second fixed frame vertically arranged above one end of the first fixed frame. The first fixed frame is U-shaped and includes a first fixed portion 21 and a second fixed portion 22 arranged in parallel and a first connecting portion 23 connected between the same ends of the first fixed portion 21 and the second fixed portion 22; the second fixed frame includes a third fixed portion 24 arranged directly above the first fixed portion 21 and two second connecting portions 25 vertically connected between the first fixed portion 21 and the third fixed portion 24 and arranged at intervals, forming a stable vertical support structure. The first fixed frame provides horizontal support through the U-shaped structure. The second fixed frame provides vertical support through the vertically arranged third fixed portion 24 and the two second connecting portions 25.

[0030] On the inner walls of the first fixing part 21, the second fixing part 22, and the third fixing part 23, grooves are provided as slide rails 28; the pulleys 26 are slidably engaged with the slide rails 28. The slide rails 28 are provided on the inner walls of the first fixing part 21, the second fixing part 22, and the third fixing part 24 as sliding paths. The pulleys 26 are slidably engaged with the slide rails 28, enabling the escalator to move smoothly within the fixing frame 2. The slide rails 28 are provided on the inner walls of the first fixing part 21, the second fixing part 22, and the third fixing part 24. The pulleys 26 are fixedly connected to the corresponding positions of the escalator and are slidably engaged with the slide rails 28. When the escalator needs to move, the escalator rolls along the slide rails 28 with the pulleys 26, enabling the escalator to extend and retract or move smoothly. When the escalator needs to be deployed, the motor or other driving devices are activated to move the escalator along the slide rails 28. When the escalator reaches the set position, the mechanical locking mechanism 4 is activated to fix the escalator in the current position, enabling users to safely use the escalator. When the escalator needs to be retracted, the mechanical locking mechanism 4 is released, and the motor or other driving devices are activated to retract the escalator along the slide rails 28.

[0031] Further, the telescopic moving rod includes a first telescopic moving rod 13 provided on one side of the middle section of the escalator main body and a second telescopic moving rod provided on one side of the bottom of the escalator main body; the second telescopic moving rod is of an H shape and includes two mutually parallel first telescopic moving parts 14 and second telescopic moving parts 15 respectively provided at the front and rear ends of the escalator main body and a connecting rod 16 provided between the first telescopic moving part 14 and the second telescopic moving part 15. The first telescopic moving rod 13 is used to provide intermediate support and guiding effects during the telescopic process of the escalator, ensuring the smoothness of the escalator during the telescopic process. The second telescopic moving rod is installed on one side of the bottom of the escalator main body and provides stable support and guiding effects through the H-shaped structure, ensuring the smoothness of the escalator during the telescopic process.

[0032] Further, the first telescopic moving rod is correspondingly arranged with the third fixing part 23 and is connected to the pulley 26 in the slide rail 28 on the third fixing part 23; the second telescopic moving rod is located between the first fixing part 21 and the second fixing part 22, and the two telescopic moving parts (the first telescopic moving part 14 and the second telescopic moving part 15) are respectively connected to the pulley 26 in the slide rail 28 on the first fixing part 21 and the second fixing part 22.

[0033] Furthermore, the automatic telescopic escalator further includes a mechanical locking mechanism 4; the mechanical locking mechanism 4 is used to lock and fix the escalator after it moves to a set position. This design can ensure the safety and stability of the escalator during use. The mechanical locking mechanism can adopt existing fixing methods. The mechanical locking mechanism can be ratchet type, hydraulic type, electric type or link type, etc. The specific selection depends on application requirements and design requirements. For example, after the escalator moves to a suitable position, a bolt can be inserted into the limit hole on the vehicle frame to prevent the escalator from moving further. The mechanical locking mechanism can also adopt a ratchet locking mechanism. The ratchet mechanism consists of a ratchet, a pawl and a spring. When the escalator moves to the set position, the pawl will catch in the tooth groove of the ratchet to prevent the escalator from moving in the reverse direction. When releasing, the pawl can be moved away from the ratchet manually or by an electromagnetic device.

[0034] Furthermore, the automatic telescopic escalator further includes an electric control system 5; the electric control system 5 is signal-connected to the servo motor.

[0035] The working principle of the present utility model is as follows:

[0036] The large-tonnage crane automatic telescopic escalator described in the present utility model is fixed to the side of the large-tonnage crane vehicle frame by fasteners. When the vehicle is driving or not in operation, the automatic telescopic escalator 9 is in a retracted state; when the vehicle is in operation, the servo motor of the telescopic escalator can be turned on by using a remote control or a switch on the escalator. The servo motor pushes the slide rail mechanism inside the escalator, so that the telescopic moving rod of the escalator moves linearly along the slide rail together with the pulley, thereby realizing the telescoping of the escalator. The escalator is welded by 6-series high-strength aluminum alloy profiles, which is light in weight and strong in structure. The escalator extends to directly below the cab 6, and enters the cab 6 for operation through the five steps (anti-slip pedals) of the escalator. After the operation is completed, the operator also returns to the ground through the escalator, and then repeats the operation to retract the escalator. If the operator forgets to retract the escalator, an alarm prompt of "escalator not in place" will be issued after the engine is started, and the driver can retract the escalator in the cab through the remote control.

[0037] The above-described embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An automatically telescopic ladder for a large-tonnage crane, characterized in that, The automatic telescopic escalator comprises: an escalator (1), a fixed frame (2) and a driving mechanism (3); The escalator (1) includes an escalator main body and a telescopic moving rod arranged on one side of the escalator main body; The fixed frame (2) is provided with a slide rail (28) and a driving mechanism (3); a pulley (26) is installed in the slide rail (28); The telescopic moving rod is connected to the slide rail (28) through the pulley (26); The driving mechanism (3) is connected to the telescopic moving rod and is used to drive the escalator (1) to move linearly along the slide rail (28).

2. The automatically telescopic escalator for large-tonnage cranes according to claim 1, wherein The driving mechanism (3) adopts a servo motor.

3. The automatically telescopic ladder for large-tonnage cranes according to claim 1, characterized in that, A connecting plate (27) is arranged on the outer wall of the fixed frame (2); The connecting plate (27) is used to install the automatic telescopic escalator (9) on the vehicle frame of the crane; The automatic telescopic escalator (9) is installed on the vehicle frame below the cab (6) of the crane.

4. The automatically telescopic escalator for large-tonnage cranes according to claim 1, wherein The escalator (1) is made of aluminum alloy.

5. The automatic telescopic escalator for large-tonnage crane according to claim 1, characterized in that The escalator main body includes an escalator frame (11) and multiple layers of treads (12) arranged on the escalator frame (11) in sequence along the height direction.

6. The automatic telescopic escalator for large-tonnage crane according to claim 1, characterized in that The fixed frame (2) includes a first fixed frame arranged in the horizontal direction and a second fixed frame vertically arranged above one end of the first fixed frame; The first fixed frame is U-shaped and includes a first fixed part (21) and a second fixed part (22) arranged in parallel and a first connecting part (23) connected between the same ends of the first fixed part (21) and the second fixed part (22); The second fixed frame includes a third fixed part (24) arranged directly above the first fixed part (21) and two second connecting parts (25) vertically connected between the first fixed part (21) and the third fixed part (24) and arranged at intervals; Grooves are arranged on the inner walls of the first fixed part (21), the second fixed part (22) and the third fixed part (24) as the slide rail (28); the pulley (26) is in sliding fit with the slide rail (28).

7. The automatic telescopic escalator for large-tonnage crane according to claim 6, characterized in that The telescopic moving rod includes a first telescopic moving rod (13) arranged on one side of the middle section of the escalator main body and a second telescopic moving rod arranged on one side of the bottom of the escalator main body; The second telescopic moving rod is H-shaped and includes two mutually parallel telescopic moving parts respectively arranged at the front and rear ends of the escalator main body and a connecting rod (16) arranged between the two telescopic moving parts; the two mutually parallel telescopic moving parts are respectively a first telescopic moving part (14) and a second telescopic moving part (15).

8. The automatic telescopic escalator for large-tonnage crane according to claim 7, characterized in that The first telescopic moving rod (13) is correspondingly arranged with the third fixing part (24), and is connected to a pulley (26) in a slide rail (28) on the third fixing part (24); the second telescopic moving rod is located between the first fixing part (21) and the second fixing part (22), and the two telescopic moving parts are respectively connected to pulleys (26) in slide rails (28) on the first fixing part (21) and the second fixing part (22).

9. The automatic telescopic escalator for large-tonnage cranes according to claim 6, characterized in that the automatic telescopic escalator (9) further comprises a mechanical locking mechanism (4); the mechanical locking mechanism (4) is used for locking and fixing the escalator after the escalator moves to a set position.

10. The automatic telescopic escalator for large-tonnage cranes according to claim 2, characterized in that the automatic telescopic escalator (9) further comprises an electric control system (5); the electric control system (5) is in signal connection with the servo motor.

Images