A mobile mixer truck ladder

Abstract

This utility model discloses a mobile concrete mixer truck ladder, including an L-shaped fixed base as an installation carrier. Two sets of strip plates are arranged on the inner top of the L-shaped fixed base, and several sets of folding foot pedal assemblies are evenly arranged between the two sets of strip plates. An electric cylinder is hinged to the bottom of the inner sidewall of the L-shaped fixed base. A connecting bearing is installed at the output end of the electric cylinder, and a connecting shaft is installed on the inner ring of the connecting bearing. One end of the connecting shaft is fixedly connected to the outer side of an adjacent set of strip plates. When not in use, this utility model controls the outer set of strip plates to move closer to the other set of strip plates via a drive device. During this process, each pair of foot pedals rotates around the connecting hinge as an axis, causing all connecting hinges to rise to their original height. When the two sets of strip plates are completely close, each pair of foot pedals has folded and retracted, greatly freeing up the space originally occupied by the concrete mixer truck ladder and improving the safety of the concrete mixer truck during operation.

Description

Technical Field

[0001] This utility model relates to the field of mixer truck equipment technology, and in particular to a mobile mixer truck ladder. Background Technology

[0002] A ladder structure is a climbing device used in concrete mixer trucks. Concrete mixer trucks are special trucks used to transport concrete for construction. Due to their shape, they are often called snail trucks. These trucks are equipped with cylindrical mixing drums to transport the mixed concrete. During transportation, the mixing drum is kept rotating to ensure that the transported concrete does not solidify.

[0003] Existing concrete mixer truck ladders are often fixedly installed on the truck frame and cannot be moved. This prevents the ladder from being retracted during truck movement, reducing safety during operation and taking up considerable space when not in use. Furthermore, the fixed installation of existing concrete mixer truck ladders means that the tilt angle cannot be adjusted for different users, thus reducing the ease of use of the ladder. Utility Model Content

[0004] The purpose of this invention is to provide a mobile concrete mixer truck ladder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mobile mixer truck ladder, comprising an L-shaped fixed base as an installation carrier, two sets of strip plates are provided on the inner top of the L-shaped fixed base, and several sets of folding pedal assemblies are evenly arranged between the two sets of strip plates. An electric cylinder is hinged to the bottom of the inner sidewall of the L-shaped fixed base, a connecting bearing is installed at the output end of the electric cylinder, and a connecting shaft is installed on the inner ring of the connecting bearing. One end of the connecting shaft is fixedly connected to the outer side of an adjacent set of strip plates. A protective compartment is installed on the outer side of one set of strip plates. Two sets of three-section telescopic rods are installed at the top and bottom between the two sets of strip plates.

[0006] Preferably, the folding pedal assembly includes a rotating shaft, and several sets of rotatable rotating shafts are symmetrically arranged on the inner sides of the two sets of strip plates. L-shaped mounting seats are symmetrically installed on the outer sides of the two sets of rotating shafts. A foot plate is hinged to the inner side of the L-shaped mounting seat. The two sets of foot plates are hinged together by a connecting hinge. A driving device for adjusting the distance between the two sets of strip plates is provided at the bottom of the L-shaped fixing seat. An adjustment driving assembly for driving the rotating shaft to rotate is provided inside the protective compartment.

[0007] Preferably, the adjustment drive assembly includes a rotating rod, which is disposed inside the protective chamber, and several sets of worm gears are installed on the outside of the protective chamber. Several sets of rotating shafts on the same side extend into the interior of the protective chamber and are equipped with worm wheels that mesh with the worm gears. A servo motor for driving the rotating rod to rotate is installed on the top of the protective chamber.

[0008] Preferably, the driving device includes bearing housings, bearing housings are symmetrically installed on both sides of the bottom of the L-shaped fixed base, and a lead screw is installed on the inner ring of the bearings of the two sets of bearing housings. A stepper motor for driving the lead screw to rotate is installed on one side of the bottom of the L-shaped fixed base. A threaded hole adapted to the lead screw is opened on the top of the inner side of one set of strip plates, and a through hole that cooperates with the lead screw is opened on the top of the inner side of the other set of strip plates.

[0009] Preferably, fixing bolts are evenly installed on the outer side of the L-shaped fixing seat, and the L-shaped fixing seat is fixedly connected to the mixer truck frame by the fixing bolts.

[0010] Preferably, an auxiliary bearing is installed on the outer end of the rotating shaft away from the L-shaped mounting seat, and the outer ring of the auxiliary bearing is fixedly connected to the inner side of an adjacent set of strip plates.

[0011] Preferably, a limiting ring is installed on the outer end of the lead screw away from the stepper motor to restrict the movement of an adjacent set of strip plates.

[0012] Beneficial effects

[0013] Compared with the prior art, this utility model provides a mobile mixer truck ladder, which has the following features:

[0014] Beneficial effects:

[0015] 1. When not in use, this utility model controls one set of outer strip plates to move closer to another set of strip plates via a drive device. During this process, each pair of foot plates rotates around the connecting hinge as an axis, causing all connecting hinges to rise at their original height. When the two sets of strip plates are completely close together, each pair of foot plates is folded and retracted, which greatly frees up the space originally occupied by the mixer truck ladder and also improves the safety of the mixer truck during operation.

[0016] 2. This utility model controls the extension of an electric cylinder to push two sets of strip plates to rotate around a lead screw, thus allowing free adjustment of the entire ladder's tilt angle. This makes it convenient for different users to use the ladder. During the extension of the electric cylinder, a servo motor drives a rotating rod to rotate, which, through the transmission of a worm gear and worm wheel, drives all rotating shafts on the same side to rotate synchronously and in the same direction. This, in turn, controls each pair of footplates to rotate accordingly, ensuring that each pair of footplates faces upwards regardless of the tilt angle of the two sets of strip plates. This further facilitates the use of the concrete mixer truck ladder and improves its practicality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional schematic diagram of the L-shaped fixing base of this utility model after removal;

[0019] Figure 3 This is a three-dimensional sectional view of the protective compartment of this utility model;

[0020] Figure 4 This is the front view of the present invention;

[0021] Figure 5 This is a bottom view of the L-shaped fixing base of this utility model;

[0022] Figure 6 This is a three-dimensional schematic diagram of the connection between the rotating shaft and the L-shaped mounting base of this utility model.

[0023] In the picture:

[0024] 10. L-shaped fixing base; 11. Strip plate; 12. Electric cylinder; 13. Connecting bearing; 14. Connecting shaft; 15. Protective compartment; 16. Three-section telescopic rod;

[0025] 20. Folding pedal assembly; 21. Rotating shaft; 22. L-shaped mounting base; 23. Footplate; 24. Connecting hinge; 25. Drive unit; 251. Bearing housing; 252. Lead screw; 253. Stepper motor;

[0026] 30. Adjustment drive assembly; 31. Rotating rod; 32. Worm gear; 33. Worm wheel; 34. Servo motor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1-6As shown, a mobile mixer truck ladder includes an L-shaped fixed base 10 as an installation carrier. The inner top of the L-shaped fixed base 10 is provided with two sets of strip plates 11, and several sets of folding pedal assemblies 20 are evenly arranged between the two sets of strip plates 11. An electric cylinder 12 is hinged to the bottom of the inner side wall of the L-shaped fixed base 10. A connecting bearing 13 is installed at the output end of the electric cylinder 12, and a connecting shaft 14 is installed on the inner ring of the connecting bearing 13. One end of the connecting shaft 14 is fixedly connected to the outer side of an adjacent set of strip plates 11. A protective chamber 15 is installed on the outer side of an set of strip plates 11. Two sets of three-section telescopic rods 16 are installed at the top and bottom between the two sets of strip plates 11.

[0029] In this embodiment, the folding pedal assembly 20 includes a rotating shaft 21. Several sets of rotatable rotating shafts 21 are symmetrically arranged on the inner side of the two sets of strip plates 11. An L-shaped mounting base 22 is symmetrically installed on the outer side of the two sets of rotating shafts 21. A foot plate 23 is hinged to the inner side of the L-shaped mounting base 22. The two sets of foot plates 23 are hinged to each other by a connecting hinge 24. The connecting hinge 24 is located on the side where the bottom of the two sets of foot plates 23 are close to each other, so that when the two sets of foot plates 23 are in a horizontal state, the two sets of foot plates 23 cannot continue to bend downward with the connecting hinge 24 as the axis. The L-shaped mounting base 22 can also restrict the foot plates 23 from rotating downward. The bottom of the L-shaped fixing base 10 is provided with a driving device 25 for adjusting the distance between the two sets of strip plates 11. The protective compartment 15 is provided with an adjustment driving assembly 30 for driving the rotating shaft 21 to rotate.

[0030] In this embodiment, the adjustment drive assembly 30 includes a rotating rod 31, which is located inside the protective chamber 15. Several sets of worm gears 32 are installed on the outside of the protective chamber 15. Several sets of rotating shafts 21 on the same side extend into the interior of the protective chamber 15 and are equipped with worm wheels 33 that mesh with the worm gears 32. A servo motor 34 that drives the rotating rod 31 to rotate is installed on the top of the protective chamber 15, which helps to adjust the tilt angle of each pair of footplates 23 simultaneously so that they always face upwards.

[0031] In this embodiment, the drive device 25 includes bearing housings 251. Bearing housings 251 are symmetrically installed on both sides of the bottom of the L-shaped fixed base 10, and a lead screw 252 is installed on the inner ring of the bearings of the two sets of bearing housings 251. A stepper motor 253 for driving the lead screw 252 to rotate is installed on one side of the bottom of the L-shaped fixed base 10. A threaded hole adapted to the lead screw 252 is opened on the top of the inner side of one set of strip plates 11, and a through hole that cooperates with the lead screw 252 is opened on the top of the inner side of the other set of strip plates 11. This helps the outer set of strip plates 11 to move due to the rotation of the lead screw 252, while the inner set of strip plates 11 will not move.

[0032] In this embodiment, fixing bolts are evenly installed on the outer side of the L-shaped fixing seat 10. The L-shaped fixing seat 10 is fixedly connected to the mixer truck frame by fixing bolts, which helps to fix the entire ladder on the top of one side of the mixer truck frame.

[0033] In this embodiment, an auxiliary bearing is installed on the outer end of the rotating shaft 21 away from the L-shaped mounting base 22, and the outer ring of the auxiliary bearing is fixedly connected to the inner side of an adjacent set of strip plates 11, which helps to improve the stability of the rotation of the L-shaped mounting base 22.

[0034] In this embodiment, a limiting ring is installed on the outer end of the lead screw 252 away from the stepper motor 253 to restrict the movement of an adjacent set of strip plates 11, which helps to limit the movement of the inner side strip plate 11.

[0035] Working principle: Before use, connect the power supply, and then fix the L-shaped fixing seat 10 to the top of one side of the mixer truck frame with fixing bolts. Then, control the stepper motor 253 to drive the lead screw 252 to rotate. The threaded action forces the outer set of strip plates 11 to gradually move away from the inner set of strip plates 11. During the process, the three-section telescopic rod 16 gradually extends, and each pair of foot plates 23 also rotates and unfolds around the hinge 24 connected to it, until each pair of foot plates 23 unfolds into a whole horizontal pedal. Then, control the electric cylinder 12 to extend and push the two sets of strip plates 11 to rotate around the lead screw 252, adjusting the tilt angle of the two sets of strip plates 11. At the same time, control the servo motor 34 to drive the rotating rod 31 to rotate. Through the transmission of the worm gear 32 and worm wheel 33, all rotating shafts 21 on the same side rotate synchronously and in the same direction, so that each pair of foot plates 23 rotates synchronously and keeps each pair of foot plates 23 facing upwards.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] 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 to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mobile mixer truck ladder, comprising an L-shaped fixed base (10) as a mounting carrier, characterized in that: The L-shaped fixed base (10) has two sets of strip plates (11) on its inner top, and several sets of folding pedal assemblies (20) are evenly arranged between the two sets of strip plates (11). An electric cylinder (12) is hinged to the bottom of the inner side wall of the L-shaped fixed base (10). A connecting bearing (13) is installed at the output end of the electric cylinder (12), and a connecting shaft (14) is installed on the inner ring of the connecting bearing (13). One end of the connecting shaft (14) is fixedly connected to the outer side of an adjacent set of strip plates (11). A protective compartment (15) is installed on the outer side of a set of strip plates (11). Two sets of three-section telescopic rods (16) are installed at the top and bottom of the two sets of strip plates (11).

2. The mobile mixer truck ladder according to claim 1, characterized in that: The folding pedal assembly (20) includes a rotating shaft (21). Several sets of rotatable rotating shafts (21) are symmetrically arranged on the inner side of the two sets of strip plates (11). An L-shaped mounting seat (22) is symmetrically installed on the outer side of the two sets of rotating shafts (21). A foot plate (23) is hinged to the inner side of the L-shaped mounting seat (22). The two sets of foot plates (23) are hinged to each other by a connecting hinge (24). A driving device (25) for adjusting the distance between the two sets of strip plates (11) is provided at the bottom of the L-shaped fixing seat (10). An adjustment driving assembly (30) for driving the rotating shaft (21) to rotate is provided inside the protective compartment (15).

3. The mobile mixer truck ladder according to claim 2, characterized in that: The adjustment drive assembly (30) includes a rotating rod (31), which is located inside the protective chamber (15). Several sets of worm gears (32) are installed on the outside of the protective chamber (15). Several sets of rotating shafts (21) on the same side extend into the interior of the protective chamber (15) and are equipped with worm wheels (33) that mesh with the worm gears (32). A servo motor (34) for driving the rotating rod (31) to rotate is installed on the top of the protective chamber (15).

4. The mobile mixer truck ladder according to claim 2, characterized in that: The driving device (25) includes bearing seats (251). Bearing seats (251) are symmetrically installed on both sides of the bottom of the L-shaped fixed seat (10). The inner rings of the bearings of the two sets of bearing seats (251) are jointly installed with lead screws (252). A stepper motor (253) for driving the lead screws (252) to rotate is installed on one side of the bottom of the L-shaped fixed seat (10). A threaded hole adapted to the lead screws (252) is opened on the top of the inner side of one set of strip plates (11), and a through hole that cooperates with the lead screws (252) is opened on the top of the inner side of the other set of strip plates (11).

5. The mobile mixer truck ladder according to claim 1, characterized in that: The L-shaped fixing seat (10) is uniformly equipped with fixing bolts on its outer side, and the L-shaped fixing seat (10) is fixedly connected to the mixer truck frame by fixing bolts.

6. The mobile mixer truck ladder according to claim 2, characterized in that: An auxiliary bearing is installed on the outer end of the rotating shaft (21) away from the L-shaped mounting base (22), and the outer ring of the auxiliary bearing is fixedly connected to the inner side of an adjacent set of strip plates (11).

7. A mobile mixer truck ladder according to claim 4, characterized in that: A limiting ring is installed on the outer end of the lead screw (252) away from the stepper motor (253) to restrict the movement of an adjacent set of strip plates (11).

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