Electric extension ladder for attic

Abstract

The utility model discloses an attic electric extension ladder, which belongs to the technical field of extension ladders and comprises an opening and closing plate, a ladder body, a driving mechanism and an opening and closing motor. The opening and closing plate is rotationally connected with the attic plate; the opening-closing motor is fixedly arranged on the opening-closing plate or the attic plate, the output end of the opening-closing motor is connected with the attic plate or the opening-closing plate through a connecting rod mechanism, the ladder body comprises a shear fork mechanism with the telescopic capacity, and one end of the ladder body is fixedly arranged on the end face of the opening-closing plate; the driving mechanism comprises a swing rod, a telescopic rod and a swing motor; one end of the swing rod is connected with the output end of the swing motor, and a rod body of the swing rod is slidably or rotatably connected with the scissor mechanism of the ladder body; one end of the telescopic rod is connected with the opening-closing plate, and the other end is rotationally connected with the oscillating rod; the swing motor is fixedly connected to the opening and closing plate, the output end of the swing motor is directly connected with the swing rod, the output end of the swing motor can do reciprocating swing motion within a set range to drive the swing rod to rotate, the swing motor is provided with a brushless controller, and the brushless controller is matched with an external remote controller.

Description

Technical Field

[0001] This utility model belongs to the field of telescopic ladder technology, and more specifically, relates to an electric telescopic ladder for attics. Background Technology

[0002] Electric retractable ladders for lofts are widely used in various settings, including residential, commercial, and warehousing facilities, leading to a corresponding increase in demand. However, residents typically need to manually carry the ladder or construct a fixed staircase to access the loft. Carrying the ladder is inconvenient, while constructing a fixed staircase takes up valuable indoor space.

[0003] Existing attic stairs are usually hydraulically driven. The drive mechanism needs to be installed in the middle of the ladder frame, which takes up a lot of space, making them bulky and inflexible. They also account for a large proportion of the overall attic stairs and are costly. Therefore, there is a need for a lightweight, flexible, and space-saving electric telescopic ladder for attics. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electric telescopic ladder for lofts, which can meet the requirements of being lightweight, flexible and space-saving.

[0005] This utility model discloses an electric telescopic ladder for lofts, comprising an opening and closing plate, a ladder body, a drive mechanism, and an opening and closing motor. The opening and closing plate is rotatably connected to the loft floor, and the opening and closing motor is fixedly mounted on the opening and closing plate or the loft floor. The output end of the opening and closing motor is connected to the loft floor or the opening and closing plate through a linkage mechanism to open and close the opening and closing plate. The ladder body includes a scissor mechanism to have telescopic capability, and one end of the scissor mechanism is fixedly mounted on the end face of the opening and closing plate.

[0006] The drive mechanism includes a swing rod, a telescopic rod, a spring, and a swing motor. One end of the swing rod is connected to the output end of the swing motor, and the other end is connected to one end of the spring. The swing rod is slidably or rotatably connected to the scissor mechanism of the ladder body. One end of the telescopic rod is connected to the opening and closing plate, and the other end is rotatably connected to the swing rod. The other end of the spring is connected to the scissor mechanism of the ladder body. The swing motor is fixedly connected to the opening and closing plate, and its output end is directly connected to the swing rod. The output end of the swing motor can perform a reciprocating swing motion within a set range to drive the swing rod to rotate. The swing motor is electrically connected to a brushless controller, which is matched with an external remote control to remotely control the start, stop, direction, and speed of the swing motor. The spring absorbs and mitigates the impact and vibration generated by the ladder body during opening and closing, ensuring the smooth movement of the attic electric telescopic ladder, reducing damage to the attic electric telescopic ladder structure caused by sudden movements or load changes, and improving the smoothness and safety of operation.

[0007] As a further improvement of the utility model, the ladder body comprises a plurality of sets of hinged frames and a plurality of ladder boards, the plurality of sets of hinged frames are hingedly connected in series to form a scissor mechanism, and each pair of hinged frames is rotatably connected to the middle part of the ladder board, so that the ladder board is prevented from being turned over to cause harm during ladder climbing, and the distance between the hinged frames is prevented from being pulled or pressed when the attic electric telescopic ladder is opened and closed.

[0008] As a further improvement of the utility model, any pair of hinged frames is rotatably connected to the swing rod, and any hinged frame below the hinged frame is connected to a spring.

[0009] As a further improvement of the utility model, the swing rod is rotatably connected to the hinged frame, any hinged frame below the hinged frame is connected to a spring, and the swing rod is rotatably connected to the hinged frame.

[0010] As a further improvement of the utility model, the swing rod is rotatably connected to the hinged frame, any hinged frame below the hinged frame is connected to a spring, and the swing rod is rotatably connected to the hinged frame.

[0011] As a further improvement of the utility model, the driving mechanism further comprises a reinforcing rod, the reinforcing rod is fixedly connected to one end of the upper and lower assembly plates of the pair of swing rods, and rotates with the pair of swing rods, so that the driving path of the swing rod not connected to the swing motor is shortened, the transmission efficiency of kinetic energy is improved, and the swing rod is prevented from being unable to swing to position, thereby preventing the ladder body from being hindered from being unfolded.

[0012] As a further improvement of the utility model, the driving mechanism further comprises a reinforcing rod, the reinforcing rod is fixedly connected to one end of the upper and lower assembly plates of the pair of swing rods, and rotates with the pair of swing rods, so that the driving path of the swing rod not connected to the swing motor is shortened, the transmission efficiency of kinetic energy is improved, and the swing rod is prevented from being unable to swing to position, thereby preventing the ladder body from being hindered from being unfolded.

[0013] As a further improvement of the utility model, the swing motor is a 24V brushless DC motor, which can ensure high-power low-speed operation, save a reducer for driving a large load, has light weight and small size, reduces the load of the opening and closing plate, has excellent torque characteristics, good low and medium speed torque performance, large starting torque and small starting current.

[0014] As a further improvement of the utility model, the pedal is provided with a friction part, the friction part is a plurality of protrusions uniformly distributed on the upper end surface of the pedal, and the bearing capacity of the telescopic ladder is improved, and the stability of a human being when climbing the pedal is improved.

[0015] As a further improvement of the utility model, still include fixed frame and assembly board, fixed frame and assembly board all one end fixed connection in the opening and closing board surface, fixed frame far from the opening and closing board one end is equipped with support platform, support platform and ladder body upper end fixed connection, assembly board includes a group of upper assembly board and a group of lower assembly board, upper assembly board and lower assembly board far from the opening and closing board one end are all equipped with hinged hole, a pair of telescopic rod one end is rotatedly connected with a group of upper assembly board hinged hole, the other end is rotatedly connected on the rod body of a pair of swing lever near the opening and closing board side, increase the stability of the utility model when the attic electric telescopic ladder opens and closes, prevent the ladder body, swing lever and opening and closing board damage or disconnect the connection between each other.

[0016] As a further improvement of the utility model, swing motor and opening and closing motor are all equipped with standby battery, the working condition of standby battery is that swing motor or opening and closing motor is powered off or lacks power, and swing motor and opening and closing motor can change self forward and reverse rotation through remote control, prevent swing motor or opening and closing motor power off from causing the ladder body to be unable to open or the opening and closing board to be unable to open, so that the telescopic ladder can be normally used without power supply, and the application scenario of the attic electric telescopic ladder is expanded.

[0017] As a further improvement of the utility model, the control system in the brushless controller is provided with opening and closing ladder buffer speed and adjusts the initial speed when the ladder body opens and closes, prevents the ladder body from moving too fast to cause personnel to be injured or too slow to reduce work efficiency, and can also set a resistance threshold to control the movement and stop of the ladder body during the opening and closing process of the ladder body, so that the ladder body can automatically stop moving when touching an object during the opening and closing process, and prevents the ladder body from injuring people during the opening and closing process.

[0018] As a further improvement of the utility model, the controller is electrically connected with the sound sensor and the voice recognition chip, the voice recognition chip can convert and transmit the sound received by the sound sensor to the controller to recognize the voice instruction and control the opening and closing movement of the ladder body.

[0019] Compared with the prior art, the utility model discloses the following beneficial effects: the hydraulic motor driving mode is abandoned, the motor is directly connected with the swing lever to drive the ladder body to open and close, the structure is optimized to save cost, the space proportion of the driving structure is reduced to reduce the weight of the opening and closing board, and the opening and closing of the telescopic ladder is more flexible.

[0020] The reinforcing rod shortens the driving path of the end of the swing lever not connected with the swing motor, improves the transmission efficiency of kinetic energy, and prevents the swing lever from swinging out of position to cause the ladder body to be blocked from unfolding.

[0021] The opening and closing motor is equipped with a standby battery, and swing motor and opening and closing motor can change self forward and reverse rotation through remote control, prevent opening and closing motor power off from causing the opening and closing board to be unable to open.

[0022] The swing motor is provided with a brushless controller, the brushless controller is matched with a remote controller, and the starting and stopping and rotating speed of the swing motor are controlled through the remote control; the control system of the brushless controller is provided with opening and closing buffer speed and initial speed, so that the personnel are prevented from being injured due to the too fast movement speed of the ladder body or the work efficiency is reduced due to the too slow movement speed of the ladder body; the resistance threshold is arranged, when the resistance reached by the ladder body during unfolding or folding reaches the threshold, the controller receives the signal, so that the ladder body can be automatically stopped when touching the object during the opening and closing process, and the personnel are prevented from being injured during the opening and closing process of the ladder body;

[0023] The sound sensor and the voice recognition chip are arranged, the opening and closing movement of the ladder body is controlled through the voice instruction, and the intelligent degree of the telescopic ladder is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the utility model;

[0025] Figure 2 It is a hidden loft board structure schematic view of the utility model;

[0026] Figure 3 It is a Figure 2 Area enlarged view;

[0027] Figure 4 It is a front view sectional view of the utility model;

[0028] Figure 5 It is a fixed frame and assembly plate connection schematic view of the utility model;

[0029] Figure 6 It is a pedal structure schematic view of the utility model;

[0030] Figure 7 It is a swing motor structure schematic view of the utility model;

[0031] Figure 8 It is a hinged frame and swing rod rotating connection schematic view of the utility model;

[0032] Figure 9 It is a hinged frame sliding column and swing rod sliding groove connection schematic view of the utility model;

[0033] Figure 10 It is a hinged frame sliding groove and swing rod sliding column connection schematic view of the utility model.

[0034] Explanation of reference numerals in the drawing:

[0035] Opening and closing board 1; fixed frame 2; support table 21; assembly plate 3; upper assembly plate 31; lower assembly plate 32; ladder body 4; hinged frame 41; ladder plate 42; friction part 421; drive mechanism 5; swing rod 51; telescopic rod 52; spring 53; swing motor 54; brushless controller 541; reinforcing rod 55; handrail 6; opening and closing motor 7; loft board 8; sliding groove a; sliding column b. DETAILED DESCRIPTION

[0036] Specific embodiment one: please see Figures 1-8 The utility model relates to a kind of loft electric telescopic ladder, including opening and closing board 1, fixed frame 2, assembly plate 3, ladder body 4, drive mechanism 5 and opening and closing motor 7, opening and closing board 1 is located on loft floor and one end of opening and closing board is hinged with loft board 8, opening and closing motor 7 is set in the connecting part of opening and closing board 1 and loft board 8 for controlling the rotary opening and closing of opening and closing board 1, fixed frame 2 and assembly plate 3 are all one end fixedly connected on the board surface of opening and closing board 1, the end of fixed frame 2 away from opening and closing board 1 is equipped with support table 21, support table 21 is fixedly connected with the upper end of ladder body 4, assembly plate 3 includes a group of upper assembly plate 31 and a group of lower assembly plate 32, the end of upper assembly plate 31 and lower assembly plate 32 away from opening and closing board 1 is equipped with hinged hole, drive mechanism 5 includes a pair of swing rods 51, a pair of telescopic rods 52, a pair of springs 53 and swing motor 54, one end of a pair of swing rods 51 is respectively connected with a group of lower assembly plate 32 rotationally, the other end is respectively connected with a pair of springs 53, and middle region is rotationally connected with ladder body 4, one end of a pair of telescopic rods 52 is respectively rotationally connected with the hinged hole of a group of upper assembly plate 31, the other end is respectively rotationally connected on the rod body of a pair of swing rods 51 close to the side of opening and closing board 1, increase the stability of the loft electric telescopic ladder of the utility model when opening and closing, prevent ladder body 4, swing rod 51 and opening and closing board 1 from damaging or disconnecting the connection between each other, the end of spring 53 not being connected with swing rod 51 is connected with ladder body 4, absorbs and alleviates the impact force and vibration generated in the opening and closing process of ladder body 4, ensures the smooth movement of loft electric telescopic ladder, reduces the damage to the structure of loft electric telescopic ladder due to sudden action or load change, can also control the opening and closing force and speed of ladder body 4, ensure that each part of loft electric telescopic ladder can move according to preset trajectory and speed, improve the smoothness and safety of operation;Swing motor 54 base is fixedly connected on opening and closing board 1, output end is directly connected to the end of swing rod 51 and lower assembly plate 32 connection, the output end of swing motor 54 can reciprocating swing motion in set range to drive swing rod 51 to rotate.

[0037] Further embodiment, such as Figures 2-4As shown, the ladder body 4 includes several sets of hinged frames 41 and several ladder boards 42, part of which are respectively hinged with the middle part of a pair of hinged frames 41, preventing the ladder board 42 from turning over during the ladder climbing process, and preventing the ladder board 42 from being pulled or squeezed due to the change of the distance between the hinged frames 41 during the opening and closing of the attic electric telescopic ladder; wherein any hinged frame 41 is rotatably connected with the rod body of the swing rod 51, and any hinged frame 41 below the hinged frame 41 is connected with the spring 53.

[0038] Further embodiments, as shown in Figures 2-3 The driving mechanism 5 further includes a reinforcing rod 55, the two ends of which are respectively fixedly connected with one end of the connecting plate 32 of the middle and lower sets of a pair of swing rods 51, and rotate with the rotation of the pair of swing rods 51, shortening the driven path of the swing rod 51 not connected with the swing motor 54, improving the transmission efficiency of kinetic energy, and preventing the swing rod 51 from swinging out of position, causing the ladder body 4 to be blocked during expansion.

[0039] Further embodiments, as shown in Figure 2 Further embodiments, as shown in

[0040] Further embodiments, as shown in Figure 4 and Figure 7 The swing motor 54 is a 24v brushless DC motor, which can ensure high-power low-speed operation, save the large load driven by the speed reducer, reduce the weight and volume, reduce the weight of the opening and closing plate 1, and has excellent torque characteristics, good low-speed torque performance, large starting torque and small starting current.

[0041] Further embodiments, as shown in Figure 6 The pedal 42 is provided with a friction part 421, which is a plurality of protrusions uniformly distributed on the upper end surface of the pedal, improving the load bearing capacity of the telescopic ladder and the stability of human climbing the pedal.

[0042] Further embodiments, as shown in Figure 1 The swing motor 54 and the opening and closing motor 7 are both provided with a backup battery, the working condition of the backup battery is that the swing motor 54 or the opening and closing motor 7 is powered off or lacks power, and the swing motor 54 and the opening and closing motor 7 can change their forward and reverse rotation through remote control, preventing the swing motor 54 or the opening and closing motor 7 from being powered off and causing the ladder body 4 to be unable to open or the opening and closing plate 1 to be unable to open, so that the telescopic ladder can be normally used without power supply, and the application scenarios of the attic electric telescopic ladder are expanded.

[0043] Further embodiments, as shown in Figure 7As shown, the swing motor 54 is connected with a brushless controller 541 through a cable, the brushless controller 541 is matched with a remote controller, and the start and stop of the swing motor 54 and the rotating speed are controlled through the remote control. The control system in the brushless controller 541 is provided with an opening and closing ladder buffer speed, which can adjust the initial speed of the ladder body 4 when the ladder body 4 is opened and closed, prevent the personnel from being injured due to the too fast movement speed of the ladder body 4, or reduce the work efficiency due to the too slow movement speed, and is provided with a resistance threshold. When the resistance received by the ladder body 4 reaches the threshold when the ladder body 4 is unfolded or folded, that is, when the ladder body 4 touches the person or object during the movement, the controller 541 receives the signal, the swing motor 54 stops rotating, and the ladder body 4 automatically stops moving, thereby protecting the staff from being injured by the ladder body 4 during the opening and closing movement.

[0044] Further, in the embodiment, as shown in Figure 7 The controller 541 is connected with a sound sensor through an analog signal and is connected with a voice recognition chip through an electrical signal. The voice recognition chip can convert and transmit the sound received by the sound sensor to the controller to recognize the voice instruction and control the opening and closing movement of the ladder body 4.

[0045] In use, the opening and closing motor 7 is started by operating the remote control or through voice, the opening and closing plate 1 is unfolded, the swing motor 54 is started in control, the swing rod 52 rotates and drives the hinged frame 41 to extend, the telescopic rod 52 extends and the spring 53 is stretched, the structure of the ladder body 4 is compensated for stability, the step plate 42 is driven to move obliquely downward, the unfolding of the ladder body 4 is completed, and the human being steps on the step plate 42 to climb; when folding, the swing motor 54 is reversed, the swing rod 41 is reversely rotated, the hinged frame 41 gradually drives the ladder plate 42 to move obliquely upward, and the ladder body 4 is folded to the initial state. The opening and closing motor 7 is started to drive the opening and closing plate 1 to rotate to be embedded in the attic plate 8. When the ladder body 4 touches the person or object during the opening and closing process, the resistance reaches the threshold value set in the controller 541, the controller 541 receives the signal, the swing motor 54 stops rotating, and the ladder body 4 automatically stops moving, thereby avoiding injury to the personnel.

[0046] Specific embodiment two: please refer to Figures 1-7 and Figure 9 The difference between this embodiment and the first embodiment is that the swing rod 51 and one side of the hinged frame 41 are provided with a sliding groove a, the hinged frame 41 is provided with a sliding column b, the sliding column b is slidingly connected in the sliding groove a, the hinged frame 41 and the swing rod 51 are slidingly connected, and any hinged frame 41 below the hinged frame 41 is connected with the spring 53, and the remaining structure is the same as that of the first embodiment.

[0047] Specific embodiment three: please refer to Figures 1-7 and Figure 10The embodiment is different from the first embodiment in that a slide column b is arranged on the swing rod 51, a slide groove a is arranged on one side of the hinged frame 41 close to the swing rod 51, the slide column b is slidably connected to the slide groove a, the hinged frame 41 is slidably connected to the swing rod 51, and any hinged frame 41 below the hinged frame 41 is connected to the spring 53, and the rest of the structure is the same as that of the first embodiment.

Claims

1. A loft power retractable ladder for use in a loft, characterised in that: The utility model relates to a folding ladder, which comprises a folding board (1), a ladder body (4), a driving mechanism (5) and a folding motor (7). The folding board (1) is rotatably connected with a loft board (8), and the folding motor (7) is fixedly arranged on the folding board (1) or the loft board (8). The output end of the folding motor (7) is connected with the loft board (8) or the folding board (1) through a connecting rod mechanism to open and close the folding board (1). The ladder body (4) comprises a scissor mechanism to have telescopic ability, and one end of the ladder body (4) is fixedly arranged on the end face of the folding board (1). The driving mechanism (5) comprises a swing rod (51), an extension rod (52), a spring (53) and a swing motor (54). One end of the swing rod (51) is connected with the output end of the swing motor (54), and the other end of the swing rod (51) is connected with one end of the spring (53). The rod body of the swing rod (51) is slidably or rotatably connected with the scissor mechanism of the ladder body (4). One end of the extension rod (52) is connected with the folding board (1), and the other end of the extension rod (52) is rotatably connected with the swing rod (51). The other end of the spring (53) is connected with the scissor mechanism of the ladder body (4). The swing motor (54) is fixedly connected with the folding board (1) and directly connected with the swing rod (51) at the output end. The output end of the swing motor (54) can be set to reciprocating swing motion to drive the swing rod (51) to rotate. The swing motor (54) is electrically connected with a brushless controller (541), and the brushless controller (541) is matched with a remote controller to remotely control the start-stop, steering and rotating speed of the swing motor (54).

2. The loft power retractable stair according to claim 1, wherein: The ladder body (4) comprises a plurality of groups of hinged frames (41) and a plurality of ladder boards (42). The plurality of groups of hinged frames (41) are hingedly connected in series to form a scissor mechanism. Each pair of hinged frames (41) is rotatably connected with the middle part of the ladder board (42).

3. The electrically motorized loft extension ladder of claim 2, wherein: Any pair of hinged frames (41) is rotatably connected with the rod body of the swing rod (51), and any hinged frame (41) below the hinged frame (41) is connected with the spring (53).

4. The electrically motorized loft extension ladder of claim 2, wherein: The swing rod (51) and one side of the hinged frame (41) are provided with a sliding groove (a), the hinged frame (41) is provided with a sliding column (b), the sliding column (b) is slidably connected with the sliding groove (a), the hinged frame (41) is slidably connected with the rod body of the swing rod (51), and any hinged frame (41) below the hinged frame (41) is connected with the spring (53).

5. The electrically motorized loft extension ladder of claim 2, wherein: The swing rod (51) is provided with a sliding column (b), one side of the hinged frame (41) close to the swing rod (51) is provided with a sliding groove (a), the sliding column (b) is slidably connected with the sliding groove (a), the hinged frame (41) is slidably connected with the rod body of the swing rod (51), and any hinged frame (41) below the hinged frame (41) is connected with the spring (53).

6. The electrically motorized loft extension ladder of claim 1, wherein: The driving mechanism (5) further comprises a reinforcing rod (55), and the two ends of the reinforcing rod (55) are rotatably connected with the rod bodies of a pair of swing rods (51) and rotatable with the pair of swing rods (51).

7. The electrically motorized loft extension ladder of claim 1, wherein: The swing motor (54) is a 24V brushless DC motor.

8. The electrically motorized loft extension ladder of claim 7, wherein: The control system in the brushless controller (541) sets a buffer speed and a resistance threshold value for opening and closing the ladder body (4) to control the movement and stop of the ladder body (4), so that the ladder body (4) automatically stops moving when touching an object during opening and closing.

9. The electrically motorized loft extension ladder of claim 1, wherein: The swing motor (54) and the opening and closing motor (7) are provided with standby batteries, and the working condition of the standby batteries is that the swing motor (54) or the opening and closing motor (7) is powered off or lacks power.

10. The motorized loft extension ladder of claim 8, wherein: The controller (541) is electrically connected with the sound sensor and the voice recognition chip, so as to identify the voice instruction to control the opening and closing movement of the ladder body (4).

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