A screw rod lifting platform for window cleaning machines

Abstract

The utility model discloses a screw rod lifting platform for window cleaning machine, including main frame, inner frame and two groups main track, the inner frame is installed in the main frame through a plurality of bolts, two groups main track are installed in the left lower part and right upper part of main frame respectively, install four screw rod bodies on the inner frame, be equipped with two lifting assemblies in the inner frame, lifting assembly includes lifting frame, link track, drive assembly and three reversers and four connecting components, the link track is welded in the upper end of lifting frame, drive assembly includes the drive motor and speed reducer of installation in the lower end of lifting frame, and the output shaft of drive motor is connected with the input shaft of speed reducer through the key. The utility model has the advantages of high stability, high precision, high security, can make lifting frame can steady synchronous lifting, and the operation of two groups lifting assemblies does not interfere with each other simultaneously, thereby can adjust the height of window cleaning machine according to the demand.

Description

Technical Field

[0001] This utility model relates to the field of window cleaning machine technology, and in particular to a screw lifting platform for a window cleaning machine. Background Technology

[0002] In the process of modern urban construction, the number of high-rise buildings continues to increase, making the cleaning and maintenance of their exterior walls increasingly important. Window cleaning machines, as the core equipment for this operation, directly affect cleaning efficiency and operational safety due to their operational stability, lifting accuracy, and safety reliability. Among these components, the lifting platform, as the key part of the window cleaning machine that carries the cleaning mechanism and personnel, has its structural design and transmission performance becoming the core factors determining the overall working efficiency of the window cleaning machine. Currently, most window cleaning machine lifting platforms on the market adopt wire rope traction, chain drive, or ordinary screw drive structures. However, these traditional structures have many shortcomings in practical applications: First, wire rope traction lifting platforms are prone to decreased lifting accuracy due to wire rope stretching, deformation, wear, or slack, and require frequent tension adjustments during long-term use, resulting in high maintenance costs and the safety hazard of wire rope breakage. Second, chain drive lifting platforms are prone to meshing gaps during operation, causing jerking during lifting, poor transmission stability, and the chains are susceptible to environmental corrosion, affecting their service life and further reducing the stability of equipment operation. Third, although ordinary screw drive lifting platforms are superior to the former two in terms of accuracy, most use single or double screw drives, lacking an effective synchronous transmission mechanism. When the platform is unbalanced, inconsistent lifting speeds on both sides can easily occur, causing the platform to tilt, which not only affects the quality of cleaning operations but may also lead to safety accidents.

[0003] Therefore, it is necessary to design a screw-driven lifting platform for window cleaning machines to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a screw-driven lifting platform for window cleaning machines. This invention has the advantages of high stability, high precision, and high safety, enabling the lifting frame to rise and fall stably and synchronously. At the same time, the operation of the two sets of lifting components does not interfere with each other, thus allowing the height of the window cleaning machine to be adjusted according to needs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A screw-driven lifting platform for a window cleaning machine includes a main frame, an inner frame, and two sets of main rails. The inner frame is installed inside the main frame by multiple bolts. The two sets of main rails are respectively installed on the lower left and upper right parts of the main frame. Four screw bodies are installed on the inner frame, and two lifting assemblies are provided inside the inner frame. Each lifting assembly includes a lifting frame, connecting rails, a drive assembly, three commutators, and four connecting assemblies. The connecting rails are welded to the upper end of the lifting frame. The drive assembly includes a drive motor and a reducer installed at the lower end of the lifting frame. The output shaft of the drive motor is connected to the input shaft of the reducer by a key. The three commutators are installed on the lifting frame. The output shaft of the reducer is connected to the input shaft of the middle commutator by a key. The output shaft of the middle commutator is connected to the input shafts of the commutators on both sides. Rotary rods are fixedly connected to the output shafts of the commutators on both sides. The side of each rotary rod away from the commutator is connected to a corresponding connecting assembly.

[0006] Preferably, the connecting assembly includes a mounting sleeve, a turbine, a threaded sleeve, and a worm gear. A plurality of the rotating rods pass through the mounting sleeve and are fixedly connected to the worm gear. The threaded sleeve is fixedly connected to the turbine. The lead screw body passes through the mounting sleeve, and the threaded sleeve is threadedly connected to the lead screw body.

[0007] Preferably, the mounting sleeve is integrally formed from a rectangular box and a cylindrical hollow block, with a thrust bearing fixedly connected inside the cylindrical hollow block, and the threaded sleeve located inside the cylindrical hollow block.

[0008] Preferably, the main frame consists of a base frame, a support frame, and two extension rods. The two sets of main tracks are respectively installed on the base frame and the extension rods. The main frame is formed by welding multiple steel beams together.

[0009] Preferably, limiters are installed at the upper ends of both sets of main tracks.

[0010] Preferably, the adjacent sides of each main track and the corresponding connecting track are mutually interlocking inclined surfaces.

[0011] Compared with existing technologies, the advantages of this device are: Compared with existing technologies, this device uses a multi-screw body in conjunction with a commutator and drive components to form a synchronous transmission structure, which solves the problems of low precision, easy tilting, and poor stability of traditional lifting platforms, achieves high-precision synchronous lifting, improves load balance, and significantly reduces safety risks. Compared with existing technologies, by setting up four fixed lead screw bodies and connecting components on the lifting frame, the two lifting components can operate independently without interfering with each other, thus ensuring the stability of the platform lifting. Compared with existing technologies, this device improves the matching accuracy between the main track and the connecting track through the inclined plane fitting design, and also adds a limit switch to accurately control the lifting limit. This not only solves the problem of easy shaking of traditional platforms, but also makes up for the deficiency of limit protection, thus taking into account both operational stability and operational safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a screw lifting platform for a window cleaning machine proposed in this utility model; Figure 2 for Figure 1 Internal diagram; Figure 3 This is a schematic diagram of the internal structure of the mounting sleeve.

[0013] In the diagram: 1 Main frame, 2 Main rail, 3 Inner frame, 4 Lead screw body, 5 Connecting rail, 6 Lifting frame, 7 Drive assembly, 8 Commutator, 9 Rotary rod, 10 Mounting sleeve, 11 Worm gear, 12 Turbine, 13 Thrust bearing, 14 Threaded sleeve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figures 1-3 A screw lifting platform for a window cleaning machine includes a main frame 1, an inner frame 3, and two sets of main rails 2. The inner frame 3 is installed inside the main frame 1 by multiple bolts. The two sets of main rails 2 are installed in the lower left and upper right parts of the main frame 1, respectively. Four screw bodies 4 are installed on the inner frame 3. The four screw bodies 4 are distributed in a rectangular shape at the four corners of the inner frame 3 to provide balanced support for the lifting action. Two lifting components are provided inside the inner frame 3. The lifting assembly includes a lifting frame 6, connecting rails 5, a drive assembly 7, three commutators 8, and four connecting components. The connecting rails 5 are welded to the upper end of the lifting frame 6, and the welding is done with full welding to ensure the connection is stable. The drive assembly 7 includes a drive motor and a reducer installed at the lower end of the lifting frame 6. The output shaft of the drive motor is connected to the input shaft of the reducer by a key. The drive motor is a servo motor, which can realize forward and reverse rotation control and speed adjustment. The output shaft of the drive motor is connected to the input shaft of the reducer by a key. The key is a flat key to ensure the stability of power transmission. The three commutators 8 are installed on the lifting frame 6 and are arranged in a straight line. The output shaft of the reducer is connected to the input shaft of the middle commutator 8 by a key. The output shaft of the middle commutator 8 is connected to the input shaft of the commutators 8 on both sides. The output shafts of the commutators 8 on both sides are fixedly connected to rotating rods 9. The side of the multiple rotating rods 9 away from the commutator 8 is connected to the corresponding connecting component.

[0016] The connecting components include a mounting sleeve 10, a turbine 12, a threaded sleeve 14, and a worm gear 11. Multiple rotating rods 9 pass through the mounting sleeve 10 and are fixedly connected to the worm gear 11. The threaded sleeve 14 is fixedly connected to the turbine 12. The lead screw body 4 passes through the mounting sleeve 10, and the threaded sleeve 14 is threadedly connected to the lead screw body 4. The threads of the threaded sleeve 14 and the lead screw body 4 are trapezoidal threads, which have the characteristics of strong load-bearing capacity and high transmission efficiency. The mounting sleeve 10 is integrally formed from a rectangular box and a cylindrical hollow block. A thrust bearing 13 is fixedly connected inside the cylindrical hollow block. The threaded sleeve 14 is located inside the cylindrical hollow block. The inner ring of the thrust bearing 13 is interference-fitted with the outer wall of the threaded sleeve 14, and the outer ring is interference-fitted with the inner wall of the cylindrical hollow block.

[0017] The main frame 1 consists of a base frame, a support frame, and two extension rods. Two sets of main rails 2 are installed on the base frame and the extension rods respectively. The main frame 1 is made of multiple steel beams welded together. Limiters are installed at the upper ends of the two sets of main rails 2. The limiters are contact type limit switches that detect the movement of the window machine on the subsequent rails to prevent derailment. The adjacent sides of each main rail 2 and the corresponding connecting rail 5 are mutually interlocking inclined surfaces.

[0018] The functional principle of this utility model can be explained through the following operation: The drive motor in the drive assembly 7 is started, and power is transmitted to the intermediate commutator 8 via the reducer. The intermediate commutator 8 distributes the power to the two side commutators 8, causing the rotating rod 9 to rotate synchronously. The rotating rod 9 drives the worm gear 11 to rotate, and the worm gear 11 meshes with the worm wheel 12, causing the threaded sleeve 14 to rotate. The threaded sleeve 14 moves up and down along the screw body 4, thereby driving the lifting frame 6 to rise and fall synchronously. During the rising and falling of the lifting frame 6, the connecting rail 5 at its upper end moves along with it until the connecting rail 5 is precisely aligned with the main rail 2 on the main frame 1. The window cleaning machine can then rely on the aligned main rail 2 and connecting rail 5 to move stably on the rail. The two sets of lifting components can operate independently to adjust the height of the window cleaning machine on the corresponding track as needed. The limiter at the upper end of the main track 2 prevents overtravel from affecting the alignment accuracy of the track, thus achieving safe and stable mobile operation of the window cleaning machine.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A screw-driven lifting platform for a window cleaning machine, characterized in that, include: The main frame (1), inner frame (3) and two sets of main rails (2) are installed inside the main frame (1) by multiple bolts. The two sets of main rails (2) are installed in the lower left and upper right parts of the main frame (1) respectively. Four screw bodies (4) are installed on the inner frame (3). Two lifting components are provided inside the inner frame (3). The lifting assembly includes a lifting frame (6), a connecting rail (5), a drive assembly (7), three commutators (8), and four connecting assemblies. The connecting rail (5) is welded to the upper end of the lifting frame (6). The drive assembly (7) includes a drive motor and a reducer installed at the lower end of the lifting frame (6). The output shaft of the drive motor is connected to the input shaft of the reducer by a key. The three commutators (8) are installed on the lifting frame (6). The output shaft of the reducer is connected to the input shaft of the middle commutator (8) by a key. The output shaft of the middle commutator (8) is connected to the input shaft of the commutators (8) on both sides. Rotary rods (9) are fixedly connected to the output shafts of the commutators (8) on both sides. The side of the multiple rotary rods (9) away from the commutator (8) is connected to the corresponding connecting assembly.

2. The screw lifting platform for a window cleaning machine according to claim 1, characterized in that: The connecting assembly includes a mounting sleeve (10), a turbine (12), a threaded sleeve (14), and a worm (11). A plurality of the rotating rods (9) pass through the mounting sleeve (10) and are fixedly connected to the worm (11). The threaded sleeve (14) is fixedly connected to the turbine (12). The lead screw body (4) passes through the mounting sleeve (10) and the threaded sleeve (14) is threadedly connected to the lead screw body (4).

3. The screw lifting platform for a window cleaning machine according to claim 2, characterized in that: The mounting sleeve (10) is integrally formed from a rectangular box and a cylindrical hollow block. A thrust bearing (13) is fixedly connected inside the cylindrical hollow block, and the threaded sleeve (14) is located inside the cylindrical hollow block.

4. The screw lifting platform for a window cleaning machine according to claim 1, characterized in that: The main frame (1) consists of a base frame, a support frame and two extension rods. The two sets of main rails (2) are respectively installed on the base frame and the extension rods. The main frame (1) is made of multiple steel beams welded together.

5. The screw lifting platform for a window cleaning machine according to claim 1, characterized in that: Limiters are installed at the upper end of both sets of main tracks (2).

6. The screw lifting platform for a window cleaning machine according to claim 1, characterized in that: Each of the main tracks (2) and the corresponding connecting tracks (5) are adjacent slopes that fit together.

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