Telescopic ladder pulley yoke

Abstract

The telescopic ladder pulley yoke comprises a first sliding frame, a rectangular groove is formed in the first sliding frame, a motor is fixedly installed in the rectangular groove, the output end of the motor is movably connected with one end of a first threaded rod, the interior of the first sliding frame is fixedly connected with the two ends of a limiting rod, and a sliding groove is formed in the side face of the first sliding frame. A second sliding frame is arranged on the first sliding frame, the side face of the second sliding frame is fixedly connected with the sliding block, the side face of the second sliding frame is fixedly connected with a reinforcing plate, and idler wheels are arranged on the side face of the reinforcing plate. Through the rectangular groove, the motor, the first threaded rod, the limiting rod, the sliding groove, the sliding block and the reinforcing plate, the overall rigidity strength of the extension ladder in the using process is enhanced, the service life of the extension ladder is prolonged, and through the barrel, the clamping ring, the connecting column, the clamping plate, the spring, the second threaded rod and the sleeve, the scene with the uneven bottom face is dealt with; the applicability of the extension ladder is enhanced; the use safety of the extension ladder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic ladders, in particular to a telescopic ladder pulley frame. Background Art

[0002] A telescopic ladder is a ladder that can be stretched and shortened. Telescopic ladders can be divided into two types: engineering telescopic ladders and bamboo telescopic ladders. They are widely used because of their easy operation, small storage requirements, and ease of taking and moving. The telescopic ladder can be placed in utility rooms, study rooms, under beds or in the trunk of a car.

[0003] According to the announcement number CN216157565U, a "telescopic ladder pulley frame" is disclosed. The patent drives the winding assembly to rotate through a motor so that the second sliding frame can be extended and retracted with the cooperation of the rack. However, in actual use, it is found that 1. The second sliding frame of the above patent is lifted and lowered by the rack on the first sliding frame through the internal gear. When people use the telescopic ladder, the first sliding frame will press the second sliding frame downward, and the focus will be concentrated at the joint of the two sliding frames. It is easy to bend or even the gear and rack will be separated after long-term use. There are safety hazards; 2. The above patent cannot effectively deal with the uneven bottom surface during use, and there are limitations in use. Utility Model Content

[0004] The utility model aims to provide a telescopic ladder pulley frame to solve the problems raised in the above background technology.

[0005] The cam is an assembly made of a plurality of movable parts, each of which has a first end fixedly mounted on the first sliding frame and a second end fixedly mounted on the second sliding frame.

[0006] Preferably, the number of the first sliding frames is two, and the first sliding frames are respectively located on both sides of the rectangular groove, one end of the rectangular groove is fixedly connected to the side of the first sliding frame, and the rectangular grooves are distributed in a linear array on the side of the first sliding frame. The inner diameter of the first sliding frame is adapted to the outer diameter of the reinforcing plate, and the reinforcing plate is slidably connected to the outer side of the first sliding frame.

[0007] Preferably, the bottom of the threaded rod 1 is rotatably connected to the rectangular groove through a bearing, the threaded rod 1 is threadedly connected to the threaded hole on the slider, the threaded rod 1 and the limit rod are respectively located on both sides of the pedal, the number of the sliders is two, and the other slider is slidably connected to the outer side of the limit rod through a circular through hole.

[0008] Preferably, the slide groove is in a rectangular shape, the slide groove is connected to the inside of the rectangular groove, and the outer side of the sliding block is slidably connected to the slide groove.

[0009] Preferably, there are two second sliding frames, the side surfaces of the second sliding frames are fixedly connected to a plurality of evenly distributed pedals, the side surfaces of the second sliding frames near the bottom are fixedly connected to a connecting shaft, and the side surfaces of the rollers are rotatably connected to one end of the connecting shaft.

[0010] Preferably, a circular through hole is provided on the side of the cylinder, and the cylinder is slidably connected to the outer side of the connecting column through the circular through hole. One end of the connecting column extends to the outer side of the cylinder and is fixedly connected to the second threaded rod. The spring is located between the cylinder and the clamping plate.

[0011] Preferably, a plurality of slots are provided on the snap ring, the outer side of the snap plate is fixedly connected to a plurality of teeth, and the snap plate is meshedly connected with the slots on the snap ring via the teeth.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model effectively enhances the overall rigidity of the telescopic ladder during use by arranging a rectangular groove, a motor, a threaded rod, a limit rod, a slide groove, a slider and a reinforcing plate, avoids the situation where the force is concentrated at the connection between the first sliding frame and the second sliding frame to cause deformation, prolongs the service life of the telescopic ladder, and utilizes the reinforcing plate to enhance the stability of the second sliding frame during use.

[0014] 2. The utility model can also effectively cope with the scene of uneven bottom surface by arranging the cylinder, the clamping ring, the connecting column, the clamping plate, the spring, the threaded rod and the sleeve, thereby enhancing the applicability of the telescopic ladder. At the same time, the telescopic sleeve is used to protect the left and right sides of the telescopic ladder to avoid the telescopic ladder from shaking left and right when in use, thereby improving the safety of the telescopic ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the first sliding frame connection structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the second sliding frame connection structure of the utility model;

[0019] Figure 5 It is a cross-sectional view of the internal structure of the cylinder of the utility model.

[0020] In the figure: 1. first sliding frame; 2. rectangular groove; 3. motor; 4. threaded rod 1; 5. limit rod; 6. slide groove; 7. pedal; 8. second sliding frame; 9. slider; 10. reinforcement plate; 11. roller; 12. cylinder; 13. snap ring; 14. connecting column; 15. clamping plate; 16. spring; 17. threaded rod 2; 18. sleeve. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-5The utility model provides a technical solution: a telescopic ladder pulley frame, including a first sliding frame 1, a rectangular groove 2 is provided inside the first sliding frame 1, the inside of the rectangular groove 2 is fixedly connected to the top of the motor 3, the output end of the motor 3 is movably connected to one end of a threaded rod 4, the bottom of the threaded rod 4 is rotatably connected to the first sliding frame 1 through a bearing, the inside of the first sliding frame 1 is welded and fixed to both ends of a limit rod 5, a slide groove 6 is provided on the side of the first sliding frame 1, the slide groove 6 is connected to the rectangular groove 2, the side of the first sliding frame 1 is fixedly connected to a plurality of pedals 7, a second sliding frame 8 is provided on the side of the first sliding frame 1, and the side of the second sliding frame 8 is welded and fixed to a slider 9, the number of the sliders 9 is two and they are symmetrically distributed, one of the sliders 9 is threadedly connected to the threaded rod 4, and the other slider 9 is slidably connected to the limit rod 5 Then, the side of the second sliding frame 8 is welded and fixed to the reinforcing plate 10, the reinforcing plate 10 is slidably connected to the outer side of the first sliding frame 1, the side of the reinforcing plate 10 is rotatably connected to the side of the roller 11 through a connecting shaft, the side of the first sliding frame 1 is welded and fixed to one end of the cylinder 12, the inside of the cylinder 12 is fixedly connected to the outside of the snap ring 13, the side of the cylinder 12 is slidably connected to the connecting column 14 through a circular through hole, one end of the connecting column 14 is fixedly connected to the clamping plate 15, the outside of the clamping plate 15 is connected with a plurality of clamping teeth, a plurality of clamping grooves are provided inside the snap ring 13, the clamping plate 15 is meshed and connected with the snap ring 13, a spring 16 is sleeved on the outside of the connecting column 14, one end of the clamping plate 15 is welded and fixed to the outside of the threaded rod 17 through the connecting column 14, the outside of the threaded rod 17 is threadedly connected to the inside of the sleeve 18, and the bottom of the sleeve 18 is fixedly connected to the support plate.

[0023] There are two first sliding frames 1, which are respectively located on both sides of the rectangular groove 2, one end of the rectangular groove 2 is fixedly connected to the side of the first sliding frame 1, and the rectangular grooves 2 are distributed in a linear array on the side of the first sliding frame 1. The inner diameter of the first sliding frame 1 is adapted to the outer diameter of the reinforcing plate 10, and the reinforcing plate 10 is slidably connected to the outer side of the first sliding frame 1. The bottom of the threaded rod 1 4 is rotatably connected to the rectangular groove 2 through a bearing, and the threaded rod 1 4 is threadedly connected to the threaded hole on the slider 9. The threaded rod 1 4 and the limit rod 5 are respectively located on both sides of the pedal 7. There are two sliders 9, and another slider 9 is slidably connected to the outer side of the limit rod 5 through a circular through hole. The threaded rod 1 4 is rotated by driving the motor 3, and the slider 9 is further driven to move up and down outside the threaded rod 1 4. The limiting rod 5 is used to limit the position to ensure the stability of the movement until the second sliding frame 8 is extended to the target position. During use, the two sliders 9 and the reinforcing plate 10 greatly improve the force effect of the second sliding frame 8 to avoid the situation where the force point is concentrated and the second sliding frame 8 is deformed by force. The shape of the slide 6 is rectangular, and the slide 6 is connected to the inside of the rectangular groove 2. The outside of the slider 9 is slidably connected to the slide 6. There are two second sliding frames 8. The side of the second sliding frame 8 is fixedly connected to a number of evenly distributed pedals 7. The side of the second sliding frame 8 near the bottom is fixedly connected to the connecting shaft. The side of the roller 11 is rotatably connected to one end of the connecting shaft. A circular through hole is opened on the side of the cylinder 12. The cylinder 12 is slidably connected to the outside of the connecting column 14 through the circular through hole. One end of the connecting column 14 extends to the outside of the cylinder 12 and is fixedly connected to the threaded rod 2 17. The spring 16 is located between the cylinder 12 and the clamping plate 15. The clamping ring 13 is provided with a plurality of slots, and the outer side of the clamping plate 15 is fixedly connected with a plurality of teeth, and the clamping plate 15 is meshed and connected with the slots on the clamping ring 13 through the teeth. The clamping plate 15 is disengaged from the clamping ring 13 by pulling the threaded rod 17 outward, and the threaded rod 17 is rotated to the target angle, and then reinserted into the clamping ring 13 under the elastic force of the spring 16 and fixed, and then the sleeve 18 is rotated to adjust the height of the sleeve 18 until the support plate abuts against and supports the bottom surface, so as to adjust the uneven ground on both sides of the telescopic ladder.

[0024] Working principle: When in use, the staff drives the motor 3 to rotate the threaded rod 14, further making the slider 9 move up and down on the outside of the threaded rod 14, and uses the slide groove 6 to limit the lifting of the threaded rod 14 to ensure the stability of movement. The slider 9 will drive the second sliding frame 8 and the reinforcement plate 10 to move up and down on the surface of the first sliding frame 1, and use the slider 9 and the reinforcement plate 10 to expand the focus point of the telescopic ladder during use, thereby reducing the squeezing of the second sliding frame 8 during use, avoiding the deformation of the second sliding frame 8 after long-term use, and then pull the threaded rod 17 outward. The clamping plate 15 is disengaged from the clamping ring 13, and then the threaded rod 17 is rotated to a suitable position. The clamping ring 13 and the clamping plate 15 are engaged with each other by the elastic force of the connecting column 14 to fix the threaded rod 17 to prevent the threaded rod 17 from deflecting. The sleeve 18 is then rotated until the bottom is in contact with the bottom surface and fixed. This operation is repeated until the telescopic ladder is leveled through the sleeves 18 on both sides, thereby solving the problem of the telescopic ladder shaking due to the uneven bottom surface. After use, the motor 3 is driven to lower the second sliding frame 8 to the bottom, and the telescopic ladder can be conveniently moved by the roller 11 to reduce the difficulty of movement.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic ladder pulley frame, comprising a first sliding frame (1), characterized in that: A rectangular groove (2) is provided inside the first sliding frame (1), a motor (3) is fixedly installed inside the rectangular groove (2), an output end of the motor (3) is movably connected to one end of a threaded rod (4), the first sliding frame (1) is fixedly connected to both ends of a limit rod (5), a sliding groove (6) is provided on the side of the first sliding frame (1), the side of the first sliding frame (1) is fixedly connected to a plurality of pedals (7), a second sliding frame (8) is provided on the first sliding frame (1), the side of the second sliding frame (8) is fixedly connected to a slider (9), and the side of the second sliding frame (8) is connected to a reinforcement The reinforcing plate (10) is fixedly connected, a roller (11) is arranged on the side of the reinforcing plate (10), the side of the first sliding frame (1) is fixedly connected to one end of the cylinder (12), the inside of the cylinder (12) is fixedly connected to a clamping ring (13), a connecting column (14) is arranged inside the cylinder (12), one end of the connecting column (14) is fixedly connected to a clamping plate (15), a spring (16) is sleeved on the outside of the connecting column (14), one end of the clamping plate (15) is fixedly connected to the second threaded rod (17) through the connecting column (14), and the outside of the second threaded rod (17) is threadedly connected to a sleeve (18).

2. The telescopic ladder pulley frame according to claim 1, characterized in that: The number of the first sliding frames (1) is two, and the first sliding frames (1) are respectively located on both sides of the rectangular groove (2), one end of the rectangular groove (2) is fixedly connected to the side of the first sliding frame (1), and the rectangular grooves (2) are distributed in a linear array on the side of the first sliding frame (1), the inner diameter of the first sliding frame (1) is compatible with the outer diameter of the reinforcing plate (10), and the reinforcing plate (10) is slidably connected to the outer side of the first sliding frame (1).

3. The telescopic ladder pulley frame according to claim 1, characterized in that: The bottom of the threaded rod (4) is rotatably connected to the rectangular groove (2) via a bearing, the threaded rod (4) is threadedly connected to the threaded hole on the slider (9), the threaded rod (4) and the limit rod (5) are respectively located on both sides of the pedal (7), the number of the sliders (9) is two, and the other slider (9) is slidably connected to the outer side of the limit rod (5) via a circular through hole.

4. The telescopic ladder pulley frame according to claim 1, characterized in that: The slide groove (6) is in the shape of a rectangle, the slide groove (6) is connected to the inside of the rectangular groove (2), and the outside of the sliding block (9) is slidably connected to the slide groove (6).

5. The telescopic ladder pulley frame according to claim 1, characterized in that: The number of the second sliding frames (8) is two, the side of the second sliding frame (8) is fixedly connected to a plurality of evenly distributed pedals (7), the side of the second sliding frame (8) near the bottom is fixedly connected to a connecting shaft, and the side of the roller (11) is rotatably connected to one end of the connecting shaft.

6. The telescopic ladder pulley frame according to claim 1, characterized in that: A circular through hole is provided on the side of the cylinder (12), and the cylinder (12) is slidably connected to the outside of the connecting column (14) through the circular through hole. One end of the connecting column (14) extends to the outside of the cylinder (12) and is fixedly connected to the second threaded rod (17). The spring (16) is located between the cylinder (12) and the clamping plate (15).

7. The telescopic ladder pulley frame according to claim 1, characterized in that: A plurality of clamping grooves are provided on the clamping ring (13); the outer side of the clamping plate (15) is fixedly connected to a plurality of clamping teeth; and the clamping plate (15) is meshedly connected with the clamping grooves on the clamping ring (13) via the clamping teeth.

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